/* ═══════════════════════════════════════════════════════════════════════════
   DPI Dashboard — Premium Dark Theme
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─── Design Tokens ───────────────────────────────────────────────────────── */

:root {
    /* Background layers - Cyberpunk Industrial */
    --bg-0: #e8e4e4;
    --bg-1: #F5F5F5;
    --bg-2: #E8E8E8;
    --bg-3: #D1D5DB;

    /* Surface (glassmorphism) - More frosted, sharper borders */
    --surface: rgba(255, 255, 255, 0.75);
    --surface-hover: rgba(255, 255, 255, 0.95);
    --surface-border: rgba(31, 111, 95, 0.15);
    --surface-glow: rgba(31, 111, 95, 0.1);

    /* Text */
    --text-0: #111827;
    --text-1: #374151;
    --text-2: #4B5563;
    --text-3: #5e626b;

    /* Accents - Cyberpunk/Neon vibes */
    --accent: #1F6F5F;
    --accent-dim: #2FA084;
    --accent-glow: rgba(31, 111, 95, 0.35);
    --accent-sec: #6FCF97;
    --success: #10b981;
    --danger: #f43f5e;
    --warning: #f59e0b;

    /* Gradients */
    --brand-grad: linear-gradient(135deg, var(--accent), var(--accent-sec));

    /* Radius & Spacing */
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;

    /* Transitions */
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ─── Reset & Base ────────────────────────────────────────────────────────── */

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 15px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-0);
    color: var(--text-1);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: 
        radial-gradient(rgba(31, 111, 95, 0.05) 1px, transparent 1px),
        linear-gradient(rgba(0, 0, 0, 0.05) 1px, transparent 1px);
    background-size: 20px 20px, 100% 3px;
    pointer-events: none;
    z-index: 0;
}

/* ─── Typography ──────────────────────────────────────────────────────────── */

h1,
h2,
h3,
h4 {
    font-family: 'Syne', sans-serif;
    color: var(--text-0);
    font-weight: 700;
}

.gradient-text {
    color: var(--accent);
    text-shadow: 0 0 20px rgba(31, 111, 95, 0.4);
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* ─── Layout ──────────────────────────────────────────────────────────────── */

.app-container {
    position: relative;
    z-index: 1;
    max-width: 1440px;
    margin: 0 auto;
    padding: 24px 28px 60px;
}

@media (max-width: 768px) {
    .app-container {
        padding: 16px 14px 40px;
    }
}

/* ─── Sticky Navbar ───────────────────────────────────────────────────────── */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 58px;
    background: rgba(238, 238, 238, 0.6);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid transparent;
    transition: background 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.navbar.scrolled {
    background: rgba(238, 238, 238, 0.88);
    border-bottom-color: var(--surface-border);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

.navbar-inner {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 28px;
    height: 100%;
    display: flex;
    align-items: center;
    gap: 32px;
}

/* Brand */
.navbar-brand {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-0);
    text-decoration: none;
    letter-spacing: -0.04em;
    text-transform: uppercase;
    flex-shrink: 0;
}

.navbar-brand-dot {
    color: var(--accent);
    text-shadow: 0 0 10px var(--accent-glow);
}

/* Links */
.navbar-links {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
    margin: 0;
    padding: 0;
    margin-left: auto;
}

.navbar-links .nav-link {
    display: inline-block;
    padding: 6px 12px;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-2);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: color 0.2s, background 0.2s;
    white-space: nowrap;
}

.navbar-links .nav-link:hover {
    color: var(--text-0);
    background: rgba(255, 255, 255, 0.06);
}

.navbar-links .nav-link.active {
    color: var(--accent);
    background: rgba(31, 111, 95, 0.08);
}

/* GitHub link accent */
.navbar-links .nav-github {
    color: var(--text-1);
    border: 1px solid var(--surface-border);
    padding: 5px 14px;
    margin-left: 8px;
}

.navbar-links .nav-github:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(31, 111, 95, 0.06);
}

/* Hamburger toggle */
.navbar-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    margin-left: auto;
}

.navbar-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-2);
    border-radius: 2px;
    transition: all 0.25s var(--ease);
    transform-origin: center;
}

.navbar-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.navbar-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.navbar-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Push content below fixed navbar */
body {
    padding-top: 58px;
}

/* Mobile navbar */
@media (max-width: 768px) {
    .navbar-toggle {
        display: flex;
    }

    .navbar-links {
        display: none;
        position: absolute;
        top: 58px;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 8px 16px 16px;
        background: rgba(238, 238, 238, 0.97);
        border-bottom: 1px solid var(--surface-border);
        backdrop-filter: blur(18px);
    }

    .navbar-links.open {
        display: flex;
    }

    .navbar-links .nav-link {
        padding: 10px 12px;
        font-size: 0.9rem;
        border-radius: 6px;
    }

    .navbar-links .nav-github {
        margin-left: 0;
        margin-top: 8px;
        text-align: center;
    }

    .navbar-inner {
        padding: 0 16px;
    }
}

/* ─── Header ──────────────────────────────────────────────────────────────── */

.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0 28px;
    border-bottom: 1px solid var(--surface-border);
    margin-bottom: 28px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo-icon {
    width: 46px;
    height: 46px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--accent), var(--accent-sec));
    display: grid;
    place-items: center;
    font-size: 22px;
    box-shadow: 0 0 20px var(--accent-glow);
}

.header h1 {
    font-size: 1.6rem;
    letter-spacing: -0.03em;
}

.header .subtitle {
    font-size: 0.82rem;
    color: var(--text-3);
    margin-top: 2px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

@media (max-width: 600px) {
    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    .header-right {
        width: 100%;
        flex-wrap: wrap;
    }
}

/* ─── Buttons ─────────────────────────────────────────────────────────────── */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(31, 111, 95, 0.1);
    background: rgba(245, 245, 245, 0.6);
    color: var(--text-0);
    font-family: 'Outfit', sans-serif;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s var(--ease);
    backdrop-filter: blur(12px);
    box-shadow: inset 0 1px 0 rgba(31, 111, 95, 0.08);
}

.btn:hover {
    background: rgba(224, 224, 224, 0.8);
    border-color: var(--accent);
    box-shadow: 0 0 15px var(--accent-glow), inset 0 0 10px rgba(31, 111, 95, 0.1);
    transform: translateY(-2px);
}

.btn-primary {
    background: var(--accent);
    border: none;
    color: #ffffff; /* Dark color for contrast against cyan background */
    box-shadow: 0 4px 15px rgba(31, 111, 95, 0.2);
    transition: all 0.3s var(--ease);
    font-weight: 700;
}

.btn-primary:hover {
    background: #30681f;
    box-shadow: 0 8px 25px rgba(31, 111, 95, 0.4);
    transform: translateY(-2px);
}

.btn-danger {
    border-color: rgba(239, 68, 68, 0.3);
    color: var(--danger);
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.12);
    border-color: var(--danger);
}

.btn-sm {
    padding: 5px 11px;
    font-size: 0.75rem;
}

/* ─── Drop Zone ───────────────────────────────────────────────────────────── */

.drop-zone {
    position: relative;
    border: 2px dashed var(--surface-border);
    border-radius: var(--radius-lg);
    background: var(--surface);
    backdrop-filter: blur(16px);
    padding: 56px 40px;
    text-align: center;
    transition: all 0.35s var(--ease);
    cursor: pointer;
    margin-bottom: 28px;
}

@media (max-width: 480px) {
    .drop-zone {
        padding: 32px 20px;
    }
    .drop-zone .icon {
        font-size: 2.5rem;
    }
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--accent);
    background: rgba(31, 111, 95, 0.08);
    box-shadow: 0 0 30px var(--accent-glow), inset 0 0 20px rgba(31, 111, 95, 0.05);
}

.drop-zone.drag-over {
    transform: scale(1.02);
}

.drop-zone .icon {
    font-size: 3rem;
    margin-bottom: 14px;
    display: block;
    opacity: 0.7;
}

.drop-zone h2 {
    font-size: 1.25rem;
    margin-bottom: 6px;
}

.drop-zone p {
    color: var(--text-3);
    font-size: 0.85rem;
}

.drop-zone input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

/* ─── Error Banner ────────────────────────────────────────────────────────── */

.error-banner {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--radius-md);
    padding: 16px 22px;
    margin-bottom: 24px;
    display: none;
    align-items: flex-start;
    gap: 12px;
    animation: slideDown 0.3s var(--ease);
}

.error-banner.visible {
    display: flex;
}

.error-banner .icon {
    font-size: 1.3rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.error-banner .message {
    color: var(--danger);
    font-size: 0.88rem;
    white-space: pre-line;
}

.error-banner .close-btn {
    margin-left: auto;
    background: none;
    border: none;
    color: var(--text-3);
    cursor: pointer;
    font-size: 1.1rem;
}

/* ─── Stats Cards ─────────────────────────────────────────────────────────── */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

@media (max-width: 640px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 400px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

.stat-card {
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.8), rgba(245, 245, 245, 0.9));
    backdrop-filter: blur(20px);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: all 0.4s var(--ease);
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    min-width: 0;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--card-accent, var(--accent)), transparent);
    opacity: 0.9;
}

.stat-card:hover {
    border-color: rgba(31, 111, 95, 0.15);
    background: linear-gradient(145deg, rgba(224, 224, 224, 0.8), rgba(245, 245, 245, 0.9));
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.3);
}

.stat-card .label {
    font-family: 'Outfit', sans-serif;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-2);
    margin-bottom: 8px;
    font-weight: 600;
}

.stat-card .value {
    font-family: 'Outfit', sans-serif;
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-0);
    font-variant-numeric: tabular-nums;
    text-shadow: 0 0 20px rgba(31, 111, 95, 0.1);
    margin: 4px 0;
}

.stat-card .sub {
    font-size: 0.78rem;
    color: var(--text-3);
    margin-top: 4px;
}

/* ─── Dashboard Grid ──────────────────────────────────────────────────────── */

.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 24px;
}

@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

.panel {
    background: linear-gradient(180deg, rgba(245, 245, 245, 0.6), rgba(209, 213, 219, 0.8));
    backdrop-filter: blur(24px);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-md);
    padding: 22px 24px;
    transition: all 0.3s var(--ease);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.05), 0 4px 20px rgba(0,0,0,0.2);
    min-width: 0;
}

.panel:hover {
    border-color: rgba(31, 111, 95, 0.25);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.05), 0 8px 30px rgba(31, 111, 95, 0.08);
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 18px;
}

.panel-title {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-0);
    display: flex;
    align-items: center;
    gap: 8px;
}

.panel-title .icon {
    font-size: 1.05rem;
}

.panel.full-width {
    grid-column: 1 / -1;
}

/* ─── Chart Containers ────────────────────────────────────────────────────── */

.chart-container {
    position: relative;
    width: 100%;
    height: 280px;
}

.chart-container.small {
    height: 220px;
}

.chart-container.tall {
    height: 340px;
}

/* ─── Tables ──────────────────────────────────────────────────────────────── */

.data-table-wrap {
    max-height: 400px;
    overflow-y: auto;
    overflow-x: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--bg-3) transparent;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.78rem;
}

.data-table th {
    text-align: left;
    padding: 12px 14px;
    font-weight: 700;
    font-family: 'Outfit', sans-serif;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-2);
    border-bottom: 1px solid var(--surface-border);
    position: sticky;
    top: 0;
    background: rgba(245, 245, 245, 0.95);
    backdrop-filter: blur(12px);
    z-index: 1;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.data-table td {
    padding: 8px 12px;
    border-bottom: 1px solid rgba(148, 163, 184, 0.06);
    color: var(--text-1);
    font-variant-numeric: tabular-nums;
}

.data-table tbody tr {
    transition: background 0.15s;
}

.data-table tbody tr:hover {
    background: rgba(56, 189, 248, 0.04);
}

@media (max-width: 768px) {
    .data-table-wrap {
        margin: 0 -12px;
        padding: 0 12px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    .data-table {
        min-width: 600px;
    }
}

/* ─── App Tag ─────────────────────────────────────────────────────────────── */

.app-tag {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    white-space: nowrap;
}

.app-tag .dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    flex-shrink: 0;
}

/* ─── Action Badges ───────────────────────────────────────────────────────── */

.badge {
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 600;
}

.badge-forward {
    background: rgba(34, 197, 94, 0.12);
    color: var(--success);
}

.badge-blocked {
    background: rgba(239, 68, 68, 0.12);
    color: var(--danger);
}

/* ─── Payload Cell ────────────────────────────────────────────────────────── */

.payload-cell {
    display: flex;
    align-items: center;
    gap: 6px;
    max-width: 260px;
}

.payload-text {
    font-family: 'Courier New', Consolas, monospace;
    font-size: 0.68rem;
    line-height: 1.4;
    color: var(--text-2);
    background: rgba(245, 245, 245, 0.6);
    padding: 3px 8px;
    border-radius: 4px;
    max-width: 200px;
    max-height: 42px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    display: inline-block;
    cursor: default;
}

.payload-text:hover {
    max-height: 120px;
    white-space: pre-wrap;
    word-break: break-all;
    overflow-y: auto;
    position: relative;
    z-index: 2;
}

.payload-hex {
    color: var(--accent-sec);
    letter-spacing: 0.04em;
}

.payload-toggle {
    flex-shrink: 0;
    padding: 2px 7px;
    font-size: 0.6rem;
    font-weight: 700;
    border-radius: 4px;
    border: 1px solid var(--surface-border);
    background: var(--bg-2);
    color: var(--accent);
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}

.payload-toggle:hover {
    border-color: var(--accent);
    background: rgba(56, 189, 248, 0.08);
}

/* ─── Feed Controls & Filter ──────────────────────────────────────────────── */

.feed-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.filter-select {
    padding: 5px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--surface-border);
    background: var(--bg-2);
    color: var(--text-1);
    font-size: 0.76rem;
    font-weight: 500;
    outline: none;
    cursor: pointer;
    transition: border-color 0.2s;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%2394a3b8'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    padding-right: 28px;
}

.filter-select:hover,
.filter-select:focus {
    border-color: var(--accent);
}

/* ─── Blocking Rules Panel ────────────────────────────────────────────────── */

.rules-section {
    margin-top: 24px;
}

.rule-input-group {
    display: flex;
    gap: 8px;
    margin-bottom: 14px;
}

.rule-input-group select,
.rule-input-group input {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--surface-border);
    background: var(--bg-2);
    color: var(--text-1);
    font-size: 0.82rem;
    outline: none;
    transition: border-color 0.2s;
}

.rule-input-group select:focus,
.rule-input-group input:focus {
    border-color: var(--accent);
}

.rule-input-group input {
    flex: 1;
}

.rule-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 500;
    margin: 3px 4px;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.25);
    color: var(--danger);
}

.rule-chip .remove {
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.15s;
}

.rule-chip .remove:hover {
    opacity: 1;
}

/* ─── Speed Control ───────────────────────────────────────────────────────── */

.speed-control {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.8rem;
    color: var(--text-2);
}

.speed-control input[type="range"] {
    width: 100px;
    accent-color: var(--accent);
}

/* ─── Progress Bar ────────────────────────────────────────────────────────── */

.progress-bar {
    width: 100%;
    height: 4px;
    background: var(--bg-3);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 20px;
    display: none;
}

.progress-bar.visible {
    display: block;
}

.progress-bar .fill {
    height: 100%;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.1s linear;
    box-shadow: 0 0 15px var(--accent-glow);
}

/* ─── Hidden State ────────────────────────────────────────────────────────── */

.dashboard-content {
    display: none;
}

.dashboard-content.visible {
    display: block;
}

/* ─── Empty State ─────────────────────────────────────────────────────────── */

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-3);
    font-size: 0.85rem;
}

.empty-state .icon {
    font-size: 2rem;
    margin-bottom: 10px;
    display: block;
}

/* ─── Hero Section ────────────────────────────────────────────────────────── */

.hero {
    text-align: center;
    padding: 60px 20px 48px;
    border-bottom: 1px solid var(--surface-border);
    margin-bottom: 40px;
}

.hero-content {
    max-width: 720px;
    margin: 0 auto;
}

.hero-badges {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.tech-badge {
    padding: 4px 14px;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    background: rgba(56, 189, 248, 0.08);
    border: 1px solid rgba(56, 189, 248, 0.2);
    color: var(--accent);
}

.hero-title {
    font-size: 4.2rem;
    font-family: 'Outfit', sans-serif;
    font-weight: 900;
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-bottom: 16px;
    text-shadow: 0 0 40px rgba(31, 111, 95, 0.3);
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 3rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.2rem;
    }
}

.hero-tagline {
    font-size: 1.1rem;
    color: var(--text-2);
    font-weight: 500;
    margin-bottom: 16px;
}

.hero-description {
    color: var(--text-3);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 28px;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 36px;
    flex-wrap: wrap;
}

.btn-lg {
    padding: 12px 24px;
    font-size: 0.9rem;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 36px;
    flex-wrap: wrap;
}

.hero-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-stat-value {
    font-family: 'Outfit', sans-serif;
    font-size: 2rem;
    font-weight: 900;
    color: var(--text-0);
    font-variant-numeric: tabular-nums;
    text-shadow: 0 0 20px rgba(31, 111, 95, 0.1);
}

.hero-stat-label {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-3);
    margin-top: 2px;
}

/* ─── Section Headers ─────────────────────────────────────────────────────── */

.section-header {
    text-align: center;
    margin-bottom: 36px;
}

.section-header h2 {
    font-size: 3rem;
    margin-bottom: 10px;
}

@media (max-width: 768px) {
    .section-header h2 {
        font-size: 2.2rem;
    }
}

.architecture-section .section-header h2 .gradient-text {
    color: var(--accent);
    text-shadow: none;
}

.section-subtitle {
    color: var(--text-2);
    font-size: 0.92rem;
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ─── Architecture Section ────────────────────────────────────────────────── */

.architecture-section {
    padding: 48px 0;
    border-bottom: 1px solid var(--surface-border);
    margin-bottom: 40px;
}

/* Pipeline Diagram */
.arch-pipeline {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    padding: 10px 0;
    margin-bottom: 40px;
    background: transparent;
}

.arch-stage {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    background: transparent;
    border: 1px dashed rgba(31, 111, 95, 0.15);
    transition: all 0.3s var(--ease);
    min-width: 120px;
}

.arch-stage:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    background: rgba(31, 111, 95, 0.05);
}

.arch-stage-icon {
    display: none;
}

.arch-stage-label {
    font-family: 'Outfit', sans-serif;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-0);
    text-align: center;
}

.arch-stage-threads {
    font-size: 0.66rem;
    color: var(--text-3);
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.arch-arrow {
    color: rgba(31, 111, 95, 0.4);
    flex-shrink: 0;
    animation: flowPulse 2s ease-in-out infinite;
}

@media (max-width: 768px) {
    .arch-pipeline {
        flex-direction: column;
        gap: 8px;
    }
    .arch-arrow {
        transform: rotate(90deg);
        height: 32px;
    }
}

@keyframes flowPulse {
    0%, 100% { opacity: 0.3; filter: drop-shadow(0 0 2px transparent); }
    50% { opacity: 1; color: var(--accent); filter: drop-shadow(0 0 8px var(--accent)); }
}

/* Stage Detail Cards */
.arch-details-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    margin-bottom: 28px;
}

.arch-detail-card {
    background: rgba(245, 245, 245, 0.4);
    backdrop-filter: blur(10px);
    border: 1px solid var(--surface-border);
    border-radius: 0;
    padding: 24px 22px;
    position: relative;
    transition: all 0.3s var(--ease);
    min-width: 0;
}

.arch-detail-card:hover {
    border-color: rgba(31, 111, 95, 0.3);
    transform: translateY(-4px);
    box-shadow: inset 0 0 20px rgba(31, 111, 95, 0.05), 0 12px 30px rgba(0, 0, 0, 0.3);
}

.arch-detail-num {
    font-size: 0.85rem;
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
    color: var(--bg-0);
    background: var(--accent);
    padding: 4px 8px;
    display: inline-block;
    margin-bottom: 12px;
    line-height: 1;
}

.arch-detail-card h3 {
    font-family: 'Syne', sans-serif;
    font-size: 1.1rem;
    color: #111827;
    font-weight: 700;
    margin-bottom: 10px;
}

.arch-detail-card p {
    color: #4b5563;
    font-family: 'Inter', sans-serif;
    font-size: 0.82rem;
    line-height: 1.65;
    margin-bottom: 14px;
}

.arch-detail-card code {
    background: rgba(209, 213, 219, 0.8);
    color: var(--accent);
    padding: 3px 8px;
    border-radius: 999px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
}

.arch-detail-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    color: rgba(255, 255, 255, 0.4);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding-top: 10px;
    border-top: 1px solid rgba(31, 111, 95, 0.08);
}

/* Design Decision Cards */
.arch-decisions {
    margin-bottom: 8px;
}

.arch-decisions>h3 {
    font-size: 1.05rem;
    color: var(--text-0);
    margin-bottom: 18px;
    text-align: center;
}

.decision-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

@media (max-width: 768px) {
    .arch-details-grid,
    .decision-grid {
        grid-template-columns: 1fr;
    }
}

.decision-card {
    background: rgba(245, 245, 245, 0.4);
    border: 1px solid var(--surface-border);
    border-radius: 0;
    padding: 22px 20px;
    transition: all 0.3s var(--ease);
    min-width: 0;
}

.decision-card:hover, .decision-card.active {
    border-color: rgba(255, 61, 110, 0.5); /* hot pink glow */
    transform: translateY(-4px);
    box-shadow: 0 0 20px rgba(255, 61, 110, 0.15), inset 0 0 10px rgba(255, 61, 110, 0.1);
}

.decision-icon {
    font-size: 1.6rem;
    margin-bottom: 10px;
}

.decision-card h4 {
    font-family: 'Syne', sans-serif;
    font-size: 0.95rem;
    color: #252323;
    margin-bottom: 8px;
}

.decision-card p {
    color: #383f45;
    font-family: 'Inter', sans-serif;
    font-size: 0.8rem;
    line-height: 1.6;
}

@keyframes fadeUpScroll {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in-scroll {
    opacity: 0;
    transform: translateY(30px);
}

.fade-in-scroll.is-visible {
    animation: fadeUpScroll 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* ─── Packet Processing Pipeline ──────────────────────────────────────────── */

.pipeline-section {
    margin-top: 36px;
    margin-bottom: 36px;
}

.pipeline-section>h3 {
    font-size: 1.15rem;
    color: var(--text-0);
    text-align: center;
    margin-bottom: 8px;
}

.pipeline-intro {
    text-align: center;
    color: var(--text-3);
    font-size: 0.85rem;
    margin-bottom: 28px;
}

.vertical-pipeline {
    max-width: 620px;
    margin: 0 auto;
}

.vp-step {
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

@media (max-width: 600px) {
    .vp-step {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 12px;
    }
    .vp-connector {
        margin: 10px auto;
    }
}

.vp-node {
    flex-shrink: 0;
    width: 130px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    background: var(--surface);
    border: 1px solid var(--surface-border);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-0);
    text-align: center;
    transition: all 0.25s var(--ease);
    backdrop-filter: blur(12px);
}

.vp-node:hover {
    border-color: rgba(56, 189, 248, 0.3);
    transform: translateX(3px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.vp-node.entry {
    background: rgba(56, 189, 248, 0.08);
    border-color: rgba(56, 189, 248, 0.25);
    color: var(--accent);
}

.vp-node.exit {
    background: rgba(255, 61, 110, 0.08); /* hot pink from --accent-sec */
    border-color: rgba(255, 61, 110, 0.25);
    color: var(--accent-sec);
}

.vp-node.highlight-node {
    background: rgba(34, 197, 94, 0.06);
    border-color: rgba(34, 197, 94, 0.25);
    color: var(--success);
    box-shadow: 0 0 16px rgba(34, 197, 94, 0.08);
}

.vp-desc {
    display: flex;
    flex-direction: column;
    gap: 3px;
    padding-top: 6px;
}

.vp-desc strong {
    font-size: 0.84rem;
    color: var(--text-0);
}

.vp-desc span {
    font-size: 0.78rem;
    color: var(--text-3);
    line-height: 1.5;
}

.vp-desc code {
    display: inline-block;
    margin-top: 4px;
    padding: 3px 10px;
    border-radius: 4px;
    background: rgba(245, 245, 245, 0.6);
    color: var(--accent);
    font-size: 0.7rem;
    font-family: 'Courier New', Consolas, monospace;
    letter-spacing: 0.02em;
}

.vp-connector {
    width: 2px;
    height: 20px;
    margin: 0 0 0 64px;
    background: repeating-linear-gradient(to bottom,
            var(--text-3) 0px,
            var(--text-3) 4px,
            transparent 4px,
            transparent 8px);
    opacity: 0.4;
}

/* ─── Capabilities Section ────────────────────────────────────────────────── */

.capabilities-section {
    margin-top: 36px;
}

.capabilities-section>h3 {
    font-size: 1.15rem;
    color: var(--text-0);
    text-align: center;
    margin-bottom: 8px;
}

.capabilities-intro {
    text-align: center;
    color: var(--text-2);
    font-size: 0.85rem;
    line-height: 1.6;
    max-width: 640px;
    margin: 0 auto 6px;
}

.capabilities-table td {
    vertical-align: top;
}

.cap-status {
    display: block;
    font-size: 0.78rem;
    font-weight: 700;
    margin-bottom: 2px;
}

.cap-status.yes {
    color: var(--success);
}

.cap-status.no {
    color: var(--danger);
}

.cap-status.partial {
    color: var(--warning);
}

.cap-note {
    display: block;
    font-size: 0.7rem;
    color: var(--text-3);
    line-height: 1.4;
}

.capabilities-summary {
    text-align: center;
    margin-top: 20px;
    font-size: 0.82rem;
    color: var(--text-2);
    line-height: 1.6;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* ─── TLS SNI Section ─────────────────────────────────────────────────────── */

.sni-section {
    margin-top: 36px;
    margin-bottom: 36px;
}

.sni-section>h3 {
    font-size: 1.15rem;
    color: var(--text-0);
    text-align: center;
    margin-bottom: 8px;
}

.sni-intro {
    text-align: center;
    color: var(--text-3);
    font-size: 0.85rem;
    margin-bottom: 28px;
}

.sni-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.sni-explainer h4,
.sni-diagram-wrap h4 {
    font-size: 0.9rem;
    color: var(--text-0);
    margin-bottom: 8px;
    margin-top: 18px;
}

.sni-explainer h4:first-child,
.sni-diagram-wrap h4:first-child {
    margin-top: 0;
}

.sni-explainer p {
    color: var(--text-2);
    font-size: 0.82rem;
    line-height: 1.6;
    margin-bottom: 10px;
}

.sni-explainer code {
    background: rgba(56, 189, 248, 0.08);
    color: var(--accent);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.76rem;
}

.sni-match-list {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.sni-match-list li {
    font-size: 0.8rem;
    color: var(--text-2);
    display: flex;
    align-items: center;
    gap: 8px;
}

.sni-match-list code {
    background: rgba(245, 245, 245, 0.6);
    color: var(--accent);
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 0.72rem;
    font-family: 'Courier New', Consolas, monospace;
}

.match-app {
    font-weight: 700;
    color: var(--text-0);
    padding: 2px 10px;
    border-radius: 4px;
    background: rgba(56, 189, 248, 0.06);
    font-size: 0.74rem;
}

/* Tree Diagram */
.sni-tree {
    background: var(--surface);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-md);
    padding: 20px;
    font-size: 0.78rem;
    font-family: 'Courier New', Consolas, monospace;
    overflow-x: auto;
}

.tree-root {
    font-weight: 700;
    color: var(--accent);
    padding: 6px 12px;
    background: rgba(56, 189, 248, 0.08);
    border-radius: 4px;
    display: inline-block;
    margin-bottom: 6px;
}

.tree-branch {
    padding-left: 24px;
    border-left: 2px solid rgba(148, 163, 184, 0.15);
    margin-left: 12px;
}

.tree-node {
    color: var(--text-1);
    font-weight: 600;
    padding: 4px 0;
    position: relative;
}

.tree-node::before {
    content: '├─ ';
    color: var(--text-3);
}

.tree-leaf {
    color: var(--text-3);
    padding: 2px 0;
}

.tree-leaf::before {
    content: '├─ ';
    color: rgba(148, 163, 184, 0.3);
}

.tree-leaf:last-child::before {
    content: '└─ ';
}

.highlight-leaf {
    color: var(--success) !important;
    font-weight: 700;
}

.sni-value {
    color: var(--warning) !important;
    font-weight: 600;
}

.sni-value strong {
    color: #f59e0b;
}

/* Terminal Window Chrome */
.terminal-window {
    border-radius: var(--radius-md);
    overflow: hidden;
    background: rgba(10, 15, 30, 0.85);
    border: 1px solid rgba(148, 163, 184, 0.12);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.terminal-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: rgba(30, 35, 50, 0.9);
    border-bottom: 1px solid rgba(148, 163, 184, 0.08);
}

.terminal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
}

.dot-red    { background: #ff5f57; }
.dot-yellow { background: #febc2e; }
.dot-green  { background: #28c840; }

.terminal-title {
    flex: 1;
    text-align: center;
    font-size: 0.7rem;
    color: #94a3b8; /* Light gray for dark terminal bar */
    font-weight: 500;
    letter-spacing: 0.02em;
    margin-right: 36px;
}

.terminal-window .code-block {
    border: none;
    border-radius: 0;
    background: transparent;
}

/* Code Blocks */
.code-block {
    background: rgba(10, 15, 30, 0.7);
    border: 1px solid rgba(148, 163, 184, 0.1);
    border-radius: var(--radius-sm);
    padding: 16px 18px;
    font-family: 'Courier New', Consolas, monospace;
    font-size: 0.74rem;
    line-height: 1.7;
    color: #e2e8f0; /* Light text for dark terminal */
    overflow-x: auto;
    white-space: pre;
    margin: 0;
}

.code-comment {
    color: #94a3b8; /* Lighter grey for better contrast on black */
}

.code-keyword {
    color: #a78bfa;
}

.code-num {
    color: #f59e0b;
}

/* ─── Build & Run Section ─────────────────────────────────────────────────── */

.build-section {
    margin-top: 36px;
}

.build-section>h3 {
    font-size: 1.15rem;
    color: var(--text-0);
    text-align: center;
    margin-bottom: 8px;
}

.build-intro {
    text-align: center;
    color: var(--text-3);
    font-size: 0.85rem;
    margin-bottom: 24px;
}

.build-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    margin-bottom: 20px;
}

.build-card {
    background: var(--surface);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-md);
    padding: 20px;
    backdrop-filter: blur(12px);
    min-width: 0;
}

.build-card.full-span {
    grid-column: 1 / -1;
}

.build-card-label {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--accent);
    font-weight: 700;
    margin-bottom: 12px;
}

.build-note {
    margin-top: 12px;
    font-size: 0.78rem;
    color: var(--text-3);
    line-height: 1.5;
}

.build-note code {
    background: rgba(56, 189, 248, 0.08);
    color: var(--accent);
    padding: 1px 5px;
    border-radius: 3px;
    font-size: 0.72rem;
}

.output-block {
    font-size: 0.68rem;
    line-height: 1.5;
    color: #22c55e;
    letter-spacing: 0.01em;
}

.build-explanation {
    background: var(--surface);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-md);
    padding: 22px 24px;
    margin-top: 12px;
}

.build-explanation h4 {
    font-size: 0.9rem;
    color: var(--text-0);
    margin-bottom: 10px;
}

.build-explanation p {
    color: var(--text-2);
    font-size: 0.82rem;
    line-height: 1.65;
}

/* ─── Showcase (shared) ───────────────────────────────────────────────────── */

.showcase-card {
    background: linear-gradient(180deg, rgba(245, 245, 245, 0.6), rgba(209, 213, 219, 0.8));
    backdrop-filter: blur(24px);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-md);
    padding: 28px 26px;
    transition: all 0.3s var(--ease);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.05), 0 4px 20px rgba(0,0,0,0.2);
    overflow-x: auto;
}

.showcase-card:hover {
    border-color: rgba(31, 111, 95, 0.25);
    box-shadow: 0 8px 30px rgba(31, 111, 95, 0.08);
}

.showcase-card-icon {
    font-size: 2rem;
    margin-bottom: 14px;
}

.showcase-card h3 {
    font-size: 1.05rem;
    color: var(--text-0);
    margin-bottom: 12px;
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0 12px;
    font-size: 0.8rem;
}

.compare-table th {
    text-align: left;
    padding: 10px 14px;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-3);
    border-bottom: 1px solid var(--surface-border);
    background: rgba(245, 245, 245, 0.3);
}

.compare-table td {
    padding: 10px 14px;
    border-bottom: 1px solid rgba(148, 163, 184, 0.06);
    color: var(--text-1);
}

.compare-table code {
    background: rgba(56, 189, 248, 0.08);
    color: var(--accent);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.76rem;
}

.compare-table tbody tr:hover {
    background: rgba(56, 189, 248, 0.04);
}

.showcase-footnote {
    margin-top: 8px;
    font-size: 0.78rem;
    color: var(--text-3);
    font-style: italic;
}

.showcase-footer {
    display: flex;
    justify-content: center;
    gap: 14px;
}

/* ─── Engineering Challenges Section ─────────────────────────────────────── */

.challenges-section {
    padding: 56px 0;
    border-bottom: 1px solid var(--surface-border);
    margin-bottom: 40px;
}

.challenges-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px;
    margin-bottom: 48px;
    border: 1px solid var(--surface-border);
}

@media (max-width: 900px) {
    .challenges-grid {
        grid-template-columns: 1fr;
    }
}

.challenge-card {
    display: flex;
    gap: 20px;
    padding: 28px 26px;
    border-right: 1px solid var(--surface-border);
    border-bottom: 1px solid var(--surface-border);
    background: rgba(245, 245, 245, 0.3);
    transition: background 0.3s var(--ease);
    min-width: 0;
}

.challenge-card:nth-child(even) {
    border-right: none;
}

.challenge-card:nth-last-child(-n+2) {
    border-bottom: none;
}

@media (max-width: 900px) {
    .challenge-card {
        border-right: none;
    }
    .challenge-card:nth-last-child(-n+2) {
        border-bottom: 1px solid var(--surface-border);
    }
    .challenge-card:last-child {
        border-bottom: none;
    }
}

.challenge-card:hover {
    background: rgba(31, 111, 95, 0.04);
}

.challenge-num {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--accent);
    opacity: 0.18;
    line-height: 1;
    flex-shrink: 0;
    padding-top: 4px;
    user-select: none;
}

.challenge-body {
    min-width: 0;
}

.challenge-body h3 {
    font-size: 1rem;
    color: var(--text-0);
    margin-bottom: 12px;
    font-family: 'Syne', sans-serif;
    font-weight: 700;
}

.challenge-body p {
    font-size: 0.82rem;
    color: var(--text-2);
    line-height: 1.7;
    margin-bottom: 10px;
}

.challenge-body p:last-of-type {
    margin-bottom: 14px;
}

.challenge-body strong {
    color: var(--text-1);
}

.challenge-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.62rem;
    text-transform: uppercase;
    letter-spacing: 0.09em;
    color: rgba(255, 255, 255, 0.3);
    padding-top: 10px;
    border-top: 1px solid rgba(31, 111, 95, 0.08);
}

/* ─── What I Learned ──────────────────────────────────────────────────────── */

.learned-section {
    background: rgba(245, 245, 245, 0.35);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-md);
    padding: 36px 32px;
}

.learned-section > h3 {
    font-family: 'Syne', sans-serif;
    font-size: 1.15rem;
    color: var(--text-0);
    margin-bottom: 8px;
    text-align: center;
}

.learned-intro {
    text-align: center;
    font-size: 0.84rem;
    color: var(--text-3);
    line-height: 1.65;
    max-width: 600px;
    margin: 0 auto 28px;
}

.learned-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

@media (max-width: 1100px) {
    .learned-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 700px) {
    .learned-grid {
        grid-template-columns: 1fr 1fr;
    }
    .learned-section {
        padding: 24px 18px;
    }
}

@media (max-width: 420px) {
    .learned-grid {
        grid-template-columns: 1fr;
    }
}

.learned-item {
    text-align: center;
    padding: 20px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--surface-border);
    background: rgba(209, 213, 219, 0.4);
    transition: all 0.3s var(--ease);
    min-width: 0;
}

.learned-item:hover {
    border-color: rgba(31, 111, 95, 0.2);
    background: rgba(31, 111, 95, 0.04);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.learned-icon {
    font-size: 1.6rem;
    margin-bottom: 10px;
}

.learned-item h4 {
    font-family: 'Syne', sans-serif;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text-0);
    margin-bottom: 8px;
}

.learned-item p {
    font-size: 0.76rem;
    color: var(--text-3);
    line-height: 1.6;
}

/* ─── Responsive (Consolidated) ───────────────────────────────────────────── */


@media (max-width: 900px) {
    .sni-grid,
    .build-grid {
        grid-template-columns: 1fr;
    }

    .hero-stats {
        gap: 24px;
    }

    .showcase-footer {
        flex-direction: column;
        align-items: center;
    }
    
    .arch-pipeline {
        flex-direction: column;
        gap: 16px;
    }
    
    .arch-arrow {
        transform: rotate(90deg);
        height: 24px;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 40px 16px 32px;
    }
    
    .hero-stats {
        gap: 16px;
    }

    .hero-stat-value {
        font-size: 1.5rem;
    }
    
    .hero-title {
        font-size: 2.8rem;
    }
    
    .section-header h2 {
        font-size: 2.2rem;
    }
    
    .arch-details-grid,
    .decision-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 500px) {
    .hero {
        padding: 32px 12px 28px;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
        gap: 10px;
    }
    
    .hero-actions .btn {
        width: 100%;
        justify-content: center;
    }

    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-stat-value {
        font-size: 1.3rem;
    }
}

/* ─── Animations ──────────────────────────────────────────────────────────── */

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

.fade-in {
    animation: fadeIn 0.4s var(--ease);
}

.processing-indicator {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent);
    font-size: 0.82rem;
    font-weight: 500;
}

.processing-indicator .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    animation: pulse 1.2s infinite;
}

/* ─── Responsive (Consolidated Mobile Utilities) ──────────────────────────── */

@media (max-width: 768px) {
    .rule-input-group {
        flex-direction: column;
        gap: 10px;
    }
    
    .rule-input-group input,
    .rule-input-group select,
    .rule-input-group .btn {
        width: 100%;
    }

    .speed-control {
        width: 100%;
        justify-content: space-between;
        background: rgba(245, 245, 245, 0.4);
        padding: 8px 12px;
        border-radius: var(--radius-sm);
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-card {
        padding: 16px;
    }
    
    .stat-card .value {
        font-size: 1.8rem;
    }
}

/* ─── Scrollbar ───────────────────────────────────────────────────────────── */

::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(31, 111, 95, 0.2);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(31, 111, 95, 0.5);
    box-shadow: 0 0 8px rgba(31, 111, 95, 0.4);
}

/* ─── Connection Flow Map ─────────────────────────────────────────────────── */

#connGroupedView {
    overflow-x: auto;
    padding-bottom: 8px;
}

.flow-group {
    min-width: 600px;
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-sm);
    margin-bottom: 6px;
    overflow: hidden;
    transition: border-color 0.2s var(--ease);
}

.flow-group:hover {
    border-color: rgba(148, 163, 184, 0.2);
}

.flow-group.flow-blocked {
    border-color: rgba(239, 68, 68, 0.15);
}

.flow-group-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    cursor: pointer;
    background: rgba(245, 245, 245, 0.3);
    transition: background 0.2s var(--ease);
}

.flow-group-header:hover {
    background: rgba(245, 245, 245, 0.5);
}

.flow-group-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.flow-group-count {
    font-size: 0.72rem;
    color: var(--text-3);
}

.flow-group-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.flow-group-packets,
.flow-group-bytes {
    font-size: 0.72rem;
    color: var(--text-2);
    font-variant-numeric: tabular-nums;
}

.flow-group-bytes {
    font-weight: 600;
    color: var(--text-1);
    min-width: 60px;
    text-align: right;
}

.flow-group-chevron {
    font-size: 0.7rem;
    color: var(--text-3);
    transition: transform 0.25s var(--ease);
}

.flow-group.expanded .flow-group-chevron {
    transform: rotate(90deg);
}

.flow-group-body {
    display: none;
    padding: 6px 10px 10px;
    gap: 6px;
}

.flow-group.expanded .flow-group-body {
    display: flex;
    flex-direction: column;
}

/* Byte Bar */
.flow-byte-bar-wrap {
    height: 4px;
    background: rgba(148, 163, 184, 0.06);
    border-radius: 2px;
    overflow: hidden;
}

.flow-byte-bar-wrap.group-bar {
    width: 80px;
}

.flow-byte-bar-wrap.inline {
    width: 70px;
    height: 5px;
}

.flow-byte-bar {
    height: 100%;
    border-radius: 2px;
    transition: width 0.4s var(--ease);
    box-shadow: 0 0 6px rgba(56, 189, 248, 0.15);
}

/* Flow Cards */
.flow-card {
    background: var(--surface);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    transition: all 0.2s var(--ease);
}

.flow-card:hover {
    border-color: rgba(148, 163, 184, 0.2);
    transform: translateX(2px);
}

.flow-card-blocked {
    border-color: rgba(239, 68, 68, 0.15);
    background: rgba(239, 68, 68, 0.03);
}

.flow-card-endpoints {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 6px;
}

.flow-ep {
    font-family: 'Courier New', Consolas, monospace;
    font-size: 0.76rem;
    font-weight: 600;
}

.flow-ep.src {
    color: var(--accent);
}

.flow-ep.dst {
    color: var(--text-1);
}

.flow-port {
    color: var(--text-3);
    font-weight: 400;
}

.flow-arrow {
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.flow-card-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.flow-proto {
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-3);
    letter-spacing: 0.04em;
}

.flow-sni {
    font-size: 0.72rem;
    color: var(--text-2);
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.flow-stats {
    font-size: 0.7rem;
    color: var(--text-3);
    font-variant-numeric: tabular-nums;
    margin-left: auto;
}

.flow-card .flow-byte-bar-wrap {
    margin-top: 6px;
}

/* Toggle button */
.btn-sm {
    font-size: 0.7rem;
    padding: 4px 10px;
    border-radius: 4px;
    background: var(--surface);
    border: 1px solid var(--surface-border);
    color: var(--text-2);
    cursor: pointer;
    transition: all 0.2s var(--ease);
}

.btn-sm:hover {
    background: rgba(56, 189, 248, 0.08);
    border-color: rgba(56, 189, 248, 0.2);
    color: var(--accent);
}

.empty-state {
    text-align: center;
    padding: 32px 16px;
    color: var(--text-3);
    font-size: 0.84rem;
}

.empty-state .icon {
    display: block;
    font-size: 1.6rem;
    margin-bottom: 8px;
}

/* ─── Toast Notifications ─────────────────────────────────────────────────── */

.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.toast {
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-0);
    background: var(--surface);
    border: 1px solid var(--surface-border);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(12px);
    transform: translateX(120%);
    opacity: 0;
    transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    pointer-events: auto;
    max-width: 380px;
}

.toast.visible {
    transform: translateX(0);
    opacity: 1;
}

.toast-danger {
    border-color: rgba(239, 68, 68, 0.3);
    background: rgba(239, 68, 68, 0.08);
    box-shadow: 0 8px 32px rgba(239, 68, 68, 0.15);
}

.toast-warning {
    border-color: rgba(245, 158, 11, 0.3);
    background: rgba(245, 158, 11, 0.08);
    box-shadow: 0 8px 32px rgba(245, 158, 11, 0.15);
}

.toast-info {
    border-color: rgba(56, 189, 248, 0.3);
    background: rgba(56, 189, 248, 0.08);
}

/* ─── Stat Card Pulse ─────────────────────────────────────────────────────── */

@keyframes pulseDanger {
    0%   { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4); }
    40%  { box-shadow: 0 0 20px 8px rgba(239, 68, 68, 0.2); }
    100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

.stat-card.pulse-danger {
    animation: pulseDanger 1.2s ease-out;
    border-color: rgba(239, 68, 68, 0.4) !important;
}

/* ─── Hex Inspector Modal ─────────────────────────────────────────────────── */

.modal {
    display: flex; /* Always flex, use visibility/pointer-events to hide */
    justify-content: center;
    align-items: center;
    visibility: hidden;
    pointer-events: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(238, 238, 238, 0.85); /* Deep navy base */
    backdrop-filter: blur(8px);
    opacity: 0;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal.show {
    visibility: visible;
    pointer-events: auto;
    opacity: 1;
}

.hex-modal-content {
    background: var(--surface);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-lg);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(31, 111, 95, 0.1);
    width: 90%;
    max-width: 900px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: translateY(20px) scale(0.98);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@media (max-width: 768px) {
    .hex-modal-content {
        width: 95%;
        max-height: 95vh;
    }
    .hex-inspector-body {
        flex-direction: column;
        padding: 16px;
    }
    .modal-header {
        padding: 12px 16px;
        flex-wrap: wrap;
    }
    .modal-meta {
        margin-left: 0;
        width: 100%;
        order: 3;
        margin-top: 8px;
    }
}

.modal.show .hex-modal-content {
    transform: translateY(0) scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    padding: 16px 24px;
    border-bottom: 1px solid var(--surface-border);
    background: rgba(245, 245, 245, 0.6);
}

.modal-header h3 {
    margin: 0;
    font-size: 1.1rem;
    color: var(--accent);
    font-family: 'Syne', sans-serif;
    font-weight: 600;
}

.modal-meta {
    margin-left: 16px;
    font-size: 0.8rem;
    color: var(--text-2);
    font-family: 'JetBrains Mono', monospace;
    flex-grow: 1;
}

.close-modal {
    color: var(--text-3);
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
    transition: color 0.2s;
}

.close-modal:hover {
    color: var(--text-0);
}

.hex-inspector-body {
    display: flex;
    gap: 16px;
    padding: 24px;
    overflow-y: auto;
    background: var(--bg);
}

.hex-pane, .ascii-pane {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.pane-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-3);
    margin-bottom: 8px;
    font-weight: 600;
}

.mono-text {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    color: #e2e8f0; /* Light text for dark terminal bg */
    background: #0b1120;
    padding: 16px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(31, 111, 95, 0.08);
    overflow-x: auto;
    white-space: pre;
    flex-grow: 1;
    margin: 0;
}

.hex-pane .mono-text {
    color: #38bdf8; /* hex bytes in light blue */
}

.ascii-pane .mono-text {
    color: #a78bfa; /* ascii in purple */
}

/* Hovering a row could link them, but simpler for now */
.payload-cell {
    display: flex;
    align-items: center;
    gap: 8px;
}

.payload-text {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
}

/* Make rows clickable */
#packetFeedBody tr {
    cursor: pointer;
    transition: background 0.2s;
}

#packetFeedBody tr:hover {
    background: rgba(56, 189, 248, 0.05);
}

/* ─── World Map (Leaflet) ─────────────────────────────────────────────────── */

#worldMap {
    width: 100%;
    height: 480px;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    background: #0c111d;
    z-index: 0;
}

/* Invert Leaflet tiles to match dark theme */
.leaflet-tile {
    filter: invert(1) hue-rotate(180deg) brightness(0.85) contrast(0.95);
}

.leaflet-container {
    background: #0c111d;
    font-family: 'Inter', sans-serif;
}

/* Custom popup */
.leaflet-popup-content-wrapper {
    background: var(--surface) !important;
    border: 1px solid var(--surface-border) !important;
    border-radius: var(--radius-sm) !important;
    box-shadow: 0 8px 24px rgba(0,0,0,0.5) !important;
    color: var(--text-1) !important;
}

.leaflet-popup-tip {
    background: var(--surface) !important;
}

.leaflet-popup-content {
    margin: 12px 16px;
    font-size: 0.82rem;
    line-height: 1.6;
}

.geo-popup-ip {
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent);
    font-size: 0.88rem;
    font-weight: 700;
    display: block;
    margin-bottom: 4px;
}

.geo-popup-info {
    color: var(--text-2);
}

.geo-popup-count {
    display: inline-block;
    margin-top: 6px;
    padding: 2px 8px;
    border-radius: 20px;
    background: rgba(31, 111, 95, 0.1);
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 600;
}