/**
 * SEBA GATE — Soft Futurism Design System
 * Production CSS3 with Logical Properties, RTL, and Dark Mode
 */

/* ==========================================================================
   1. COLOR TOKENS & SYSTEM VARIABLES
   ========================================================================== */
:root {
    /* Canvas & Surfaces */
    --bg:           #F5F9FD;
    --mist:         #EEF1F6;
    --surface:      #FFFFFF;
    --surface-card: #FFFFFF;
    --line:         #DCE2EE;
    --line-subtle:  rgba(220, 226, 238, 0.6);

    /* Text & Ink (WCAG AA compliant contrast) */
    --ink:          #12172B; /* Contrast > 7:1 against --bg */
    --text:         #4A5470; /* Contrast > 4.5:1 against --bg */
    --muted:        #717D96;
    --brand:        #1E3A8A; /* Navy focus ring & active states */
    --brand-light:  #3B82F6;

    /* Interactive Buttons */
    --button:       #12172B;
    --button-text:  #FFFFFF;
    --button-hover: #1E2746;
    --secondary-btn: #EEF2F9;
    --secondary-btn-hover: #E2E8F4;

    /* Soft Glows & Gradients (Reference B) */
    --glow-a:       #F3E8FA; /* Soft lilac */
    --glow-b:       #DCE7FF; /* Soft sky blue */
    --glow-accent:  #D7A0DF; /* Decorative vector strokes only */
    --gold:         #D4AF37; /* Tiny accents only (the inner node dot) */
    
    /* Semantic Status */
    --success:      #10B981;
    --success-text: #047857; /* Contrast > 4.5:1 */
    --warning:      #F59E0B;
    --danger:       #EF4444;

    /* Soft Relief Lighting (Reference A Hero) */
    --shadow-dark:  #D3D8E6;
    --shadow-light: #FFFFFF;
    --panel-shadow: 0 32px 64px -12px rgba(18, 23, 43, 0.08), 0 12px 24px -6px rgba(18, 23, 43, 0.04);
    --card-shadow:  0 8px 24px -4px rgba(18, 23, 43, 0.04);
    --card-hover-shadow: 0 16px 36px -6px rgba(18, 23, 43, 0.08);

    /* Typography Stacks */
    --font-heading: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    --font-body:    'Inter', system-ui, -apple-system, sans-serif;
    --letter-spacing-caps: 0.18em;

    /* Spacing & Radii */
    --radius-sm:    8px;
    --radius-md:    14px;
    --radius-lg:    22px;
    --radius-xl:    32px;
    --radius-pill:  9999px;
    --container-max: 1240px;
}

/* Dark Mode Tokens */
[data-theme="dark"] {
    --bg:           #0E1220;
    --mist:         #1A2136;
    --surface:      #151B2E;
    --surface-card: #161D32;
    --line:         #2A3350;
    --line-subtle:  rgba(42, 51, 80, 0.7);

    --ink:          #F1F3FA;
    --text:         #B8BFD6;
    --muted:        #7E8BA8;
    --brand:        #60A5FA;
    --brand-light:  #93C5FD;

    --button:       #E8ECF8;
    --button-text:  #12172B;
    --button-hover: #FFFFFF;
    --secondary-btn: #1E2740;
    --secondary-btn-hover: #263252;

    --glow-a:       #2A1D3D;
    --glow-b:       #192340;
    --glow-accent:  #8E5899;
    --gold:         #FBBF24;

    --success:      #10B981;
    --success-text: #34D399;

    --shadow-dark:  #080B14;
    --shadow-light: #1D253D;
    --panel-shadow: 0 32px 64px -12px rgba(0, 0, 0, 0.4), 0 8px 16px rgba(0, 0, 0, 0.3);
    --card-shadow:  0 8px 24px -4px rgba(0, 0, 0, 0.3);
    --card-hover-shadow: 0 16px 36px -6px rgba(0, 0, 0, 0.5);
}

/* Arabic Typography & Rules (Strict Zero-Letter-Spacing for Arabic Cursive) */
html[dir="rtl"] {
    --font-heading: 'Alexandria', 'Plus Jakarta Sans', system-ui, sans-serif;
    --font-body:    'IBM Plex Sans Arabic', 'Inter', system-ui, sans-serif;
    --letter-spacing-caps: 0;
}

/* ==========================================================================
   2. GLOBAL RESET & BASE STYLES
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body.seba-body {
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    transition: background-color 0.25s ease, color 0.25s ease;
}

/* Page-Edge Radial Ambient Glow (Reference B) */
body.seba-body::before,
body.seba-body::after {
    content: '';
    position: fixed;
    width: 60vw;
    height: 60vw;
    max-width: 800px;
    max-height: 800px;
    border-radius: 50%;
    filter: blur(120px);
    pointer-events: none;
    z-index: -1;
    opacity: 0.5;
}

body.seba-body::before {
    top: -20vw;
    inset-inline-end: -20vw;
    background: radial-gradient(circle, var(--glow-a) 0%, transparent 70%);
}

body.seba-body::after {
    bottom: -20vw;
    inset-inline-start: -20vw;
    background: radial-gradient(circle, var(--glow-b) 0%, transparent 70%);
}

/* Accessibility Focus Ring */
:focus-visible {
    outline: 2px solid var(--brand);
    outline-offset: 3px;
}

/* Accessible Skip Link */
.skip-link {
    position: absolute;
    top: -100px;
    inset-inline-start: 1rem;
    background: var(--button);
    color: var(--button-text);
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-sm);
    z-index: 10000;
    text-decoration: none;
    font-weight: 500;
    transition: top 0.2s ease;
}

.skip-link:focus {
    top: 1rem;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
    color: var(--ink);
    font-family: var(--font-heading);
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: -0.02em;
    text-wrap: balance;
}

a {
    color: inherit;
    text-decoration: none;
}

/* ==========================================================================
   3. NAVIGATION (TOP BAR CONTRACT)
   ========================================================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(245, 249, 253, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
    transition: background 0.25s ease, border-color 0.25s ease;
}

[data-theme="dark"] .site-header {
    background: rgba(14, 18, 32, 0.85);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0.875rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

/* Zone 1: Brand */
.brand-link {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--ink);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.05rem;
    letter-spacing: 0.08em;
    white-space: nowrap;
}

.brand-logo {
    flex-shrink: 0;
    color: var(--ink);
}

/* Zone 2: Navigation Links */
.desktop-nav {
    display: flex;
    align-items: center;
    gap: 1.75rem;
}

.nav-link {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-caps);
    color: var(--text);
    padding: 0.5rem 0;
    position: relative;
    transition: color 0.15s ease;
    white-space: nowrap;
}

html[dir="rtl"] .nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: none;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    inset-inline-start: 0;
    width: 0;
    height: 1.5px;
    background: var(--ink);
    transition: width 0.2s ease;
}

.nav-link:hover {
    color: var(--ink);
}

.nav-link:hover::after,
.nav-link.is-active::after {
    width: 100%;
}

.nav-link.is-active {
    color: var(--ink);
    font-weight: 600;
}

/* Zone 3: Actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.875rem;
}

.btn-lang {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text);
    padding: 0.4rem 0.75rem;
    border-radius: var(--radius-pill);
    border: 1px solid var(--line);
    background: var(--surface);
    transition: all 0.2s ease;
}

.btn-lang:hover {
    color: var(--ink);
    border-color: var(--ink);
}

.btn-theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-pill);
    border: 1px solid var(--line);
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-theme-toggle:hover {
    color: var(--ink);
    border-color: var(--ink);
}

.icon-sun { display: none; }
.icon-moon { display: block; }

[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }

.portal-nav-link {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--muted);
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.4rem 0.6rem;
    transition: color 0.15s ease;
}

.portal-nav-link:hover {
    color: var(--ink);
}

.portal-badge {
    font-size: 0.7rem;
    opacity: 0.6;
}

/* Primary Dark Pill Button */
.btn-pill-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-height: 48px;
    padding: 0 1.5rem;
    border-radius: var(--radius-pill);
    background: var(--button);
    color: var(--button-text);
    font-size: 0.8125rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-caps);
    border: none;
    cursor: pointer;
    white-space: nowrap;
    box-shadow: 0 4px 12px rgba(18, 23, 43, 0.12);
    transition: transform 0.15s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.15s ease, box-shadow 0.15s ease;
}

html[dir="rtl"] .btn-pill-primary {
    font-size: 0.9375rem;
    text-transform: none;
}

.btn-pill-primary:hover {
    background: var(--button-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(18, 23, 43, 0.18);
}

.btn-pill-primary:active {
    transform: scale(0.98);
}

.btn-pill-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-height: 48px;
    padding: 0 1.5rem;
    border-radius: var(--radius-pill);
    background: var(--secondary-btn);
    color: var(--ink);
    font-size: 0.8125rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-caps);
    border: 1px solid var(--line);
    cursor: pointer;
    white-space: nowrap;
    transition: transform 0.15s ease, background 0.15s ease;
}

html[dir="rtl"] .btn-pill-secondary {
    font-size: 0.9375rem;
    text-transform: none;
}

.btn-pill-secondary:hover {
    background: var(--secondary-btn-hover);
    transform: translateY(-1px);
}

.btn-mobile-menu {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.hamburger-bar {
    width: 100%;
    height: 2px;
    background: var(--ink);
    transition: all 0.2s ease;
}

/* ==========================================================================
   4. SIGNATURE HERO SECTION (REFERENCE A: SOFT-RELIEF FLOATING PANEL)
   ========================================================================== */
.hero-wrapper {
    max-width: var(--container-max);
    margin: 2rem auto 4rem;
    padding: 0 1.5rem;
}

.hero-relief-panel {
    background-color: var(--mist);
    border-radius: var(--radius-xl);
    border: 1px solid var(--line);
    box-shadow: var(--panel-shadow);
    position: relative;
    overflow: hidden;
    min-height: 580px;
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    align-items: end;
    padding: 4rem 3.5rem 3.5rem;
}

.hero-content-col {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    max-width: 540px;
}

.hero-kicker-text {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-caps);
    color: var(--muted);
    font-weight: 600;
    margin-bottom: 1.25rem;
}

html[dir="rtl"] .hero-kicker-text {
    text-transform: none;
    font-size: 0.875rem;
}

.hero-headline {
    font-size: clamp(2.25rem, 3.8vw, 3.25rem);
    font-weight: 300;
    color: var(--ink);
    line-height: 1.1;
    margin-bottom: 1.25rem;
}

.hero-subheadline {
    font-size: 1.0625rem;
    color: var(--text);
    line-height: 1.6;
    margin-bottom: 2.25rem;
    max-width: 480px;
}

.hero-cta-group {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Right 55% Topographic Contour Artwork */
.hero-contour-col {
    position: absolute;
    inset-block-start: 0;
    inset-block-end: 0;
    inset-inline-end: 0;
    width: 60%;
    height: 100%;
    pointer-events: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-contour-svg {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.95;
}

/* ==========================================================================
   5. SAMPLE DATA STATS RIBBON
   ========================================================================== */
.stats-ribbon {
    max-width: var(--container-max);
    margin: -1.5rem auto 5rem;
    padding: 0 1.5rem;
    position: relative;
    z-index: 3;
}

.stats-ribbon-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    padding: 1.75rem 2.5rem;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    border-inline-end: 1px solid var(--line-subtle);
    padding-inline-end: 1.5rem;
}

.stat-item:last-child {
    border-inline-end: none;
    padding-inline-end: 0;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 300;
    color: var(--ink);
    line-height: 1;
    margin-bottom: 0.5rem;
    font-variant-numeric: tabular-nums;
}

.stat-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text);
    line-height: 1.4;
    margin-bottom: 0.25rem;
}

.sample-tag {
    font-size: 0.6875rem;
    color: var(--muted);
    font-style: italic;
}

/* ==========================================================================
   6. SECTION SYSTEM & CONTAINERS
   ========================================================================== */
.section {
    max-width: var(--container-max);
    margin: 6rem auto;
    padding: 0 1.5rem;
}

.section-header {
    margin-bottom: 3.5rem;
    max-width: 680px;
}

.section-kicker {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-caps);
    color: var(--brand);
    margin-bottom: 0.75rem;
    display: block;
}

html[dir="rtl"] .section-kicker {
    font-size: 0.875rem;
    text-transform: none;
}

.section-title {
    font-size: clamp(1.875rem, 2.5vw, 2.375rem);
    font-weight: 400;
    color: var(--ink);
    line-height: 1.2;
    margin-bottom: 1rem;
}

.section-lead {
    font-size: 1.0625rem;
    color: var(--text);
    line-height: 1.6;
}

/* ==========================================================================
   7. CARDS & BENTO GRIDS (HAIRLINE BORDERS, 20-24px RADIUS)
   ========================================================================== */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.75rem;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.75rem;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 2.25rem 2rem;
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease, border-color 0.2s ease;
    display: flex;
    flex-direction: column;
    position: relative;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--card-hover-shadow);
    border-color: var(--ink);
}

.card-icon-wrap {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: var(--mist);
    border: 1px solid var(--line);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ink);
    margin-bottom: 1.5rem;
    flex-shrink: 0;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--ink);
    margin-bottom: 0.75rem;
}

.card-desc {
    font-size: 0.9375rem;
    color: var(--text);
    line-height: 1.6;
    margin-bottom: 1.25rem;
    flex-grow: 1;
}

.card-meta {
    font-size: 0.8125rem;
    color: var(--muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--line-subtle);
}

/* ==========================================================================
   8. TAB-PILL SWITCHER & NOTCHED FILE-TAB PANEL (REFERENCE B)
   ========================================================================== */
.tabs-control-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}

.tab-pill {
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-pill);
    border: 1px solid var(--line);
    background: var(--surface);
    color: var(--text);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tab-pill:hover {
    color: var(--ink);
    border-color: var(--ink);
}

.tab-pill.is-active {
    background: var(--button);
    color: var(--button-text);
    border-color: var(--button);
    box-shadow: 0 4px 12px rgba(18, 23, 43, 0.12);
}

/* Notched File-Tab Panel */
.notched-panel {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    padding: 3.5rem;
    box-shadow: var(--panel-shadow);
    position: relative;
    overflow: hidden;
}

.tab-content-pane {
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: 3.5rem;
    align-items: center;
    animation: paneCrossfade 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.tab-content-pane.is-active {
    display: grid;
}

@keyframes paneCrossfade {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.pane-kicker {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-caps);
    color: var(--brand);
    margin-bottom: 0.75rem;
}

.pane-headline {
    font-size: 2.25rem;
    font-weight: 300;
    color: var(--ink);
    line-height: 1.2;
    margin-bottom: 1.25rem;
}

.pane-text {
    font-size: 1rem;
    color: var(--text);
    line-height: 1.6;
    margin-bottom: 2rem;
}

.pane-visual {
    position: relative;
    background: var(--mist);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    min-height: 320px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* Floating UI Chip Notification (Reference B) */
.floating-chip {
    position: absolute;
    bottom: 1.5rem;
    inset-inline-start: 1.5rem;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-pill);
    padding: 0.625rem 1.125rem;
    display: inline-flex;
    align-items: center;
    gap: 0.625rem;
    box-shadow: 0 10px 24px rgba(18, 23, 43, 0.08);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--ink);
    z-index: 5;
    animation: floatLevitate 4s ease-in-out infinite;
}

.chip-dot-pulse {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

@keyframes floatLevitate {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

/* ==========================================================================
   9. TWO PATHS BAND
   ========================================================================== */
.two-paths-band {
    background: linear-gradient(135deg, var(--mist) 0%, rgba(220, 231, 255, 0.3) 100%);
    border-radius: var(--radius-xl);
    border: 1px solid var(--line);
    padding: 3.5rem;
    margin: 5rem auto;
    max-width: var(--container-max);
}

.two-paths-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.path-box {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
}

.path-flag {
    align-self: flex-start;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-caps);
    color: var(--brand);
    background: var(--glow-b);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-pill);
    margin-bottom: 1rem;
}

.path-title {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--ink);
    margin-bottom: 0.75rem;
}

/* ==========================================================================
   10. PROGRAMS LIFECYCLE (7 STEPS TIMELINE)
   ========================================================================== */
.lifecycle-timeline {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1rem;
    margin: 3.5rem 0 2rem;
    position: relative;
}

.lifecycle-step {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: 1.25rem 1rem;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.lifecycle-step:hover {
    border-color: var(--ink);
    transform: translateY(-2px);
}

.step-num {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--brand);
    margin-bottom: 0.5rem;
}

.step-name {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 0.35rem;
}

.step-desc {
    font-size: 0.8125rem;
    color: var(--text);
    line-height: 1.4;
}

.handover-block {
    margin-top: 2rem;
    background: var(--mist);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 2.25rem 2.5rem;
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2.5rem;
    align-items: center;
}

.handover-triad {
    display: flex;
    gap: 1.5rem;
}

.triad-item {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--ink);
}

/* ==========================================================================
   11. EMPTY LOGO STRIP & PARTNER QUOTE PLACEHOLDER
   ========================================================================== */
.logo-strip {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1.25rem;
    margin: 2.5rem 0;
}

.logo-slot-dashed {
    height: 64px;
    border: 1.5px dashed var(--line);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--muted);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    background: transparent;
}

.quote-placeholder-block {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    padding: 3rem;
    text-align: center;
    margin: 4rem auto;
    max-width: 860px;
}

.quote-text {
    font-family: var(--font-heading);
    font-size: 1.375rem;
    font-weight: 300;
    color: var(--ink);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.quote-author {
    font-size: 0.875rem;
    color: var(--muted);
}

/* ==========================================================================
   12. ACCORDION (FAQ)
   ========================================================================== */
.faq-accordion {
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
    max-width: 860px;
    margin: 0 auto;
}

.faq-item {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color 0.2s ease;
}

.faq-trigger {
    width: 100%;
    text-align: start;
    padding: 1.5rem 1.75rem;
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    font-family: var(--font-heading);
    font-size: 1.0625rem;
    font-weight: 500;
    color: var(--ink);
}

.faq-chevron {
    flex-shrink: 0;
    transition: transform 0.25s ease;
    color: var(--muted);
}

.faq-item[open] .faq-chevron,
.faq-item.is-open .faq-chevron {
    transform: rotate(180deg);
}

.faq-content {
    padding: 0 1.75rem 1.75rem;
    font-size: 0.9375rem;
    color: var(--text);
    line-height: 1.65;
}

/* ==========================================================================
   13. CLOSING CTA BAND (REFERENCE B: SOFT GRADIENT ARC)
   ========================================================================== */
.closing-cta-band {
    max-width: var(--container-max);
    margin: 6rem auto 4rem;
    padding: 0 1.5rem;
}

.cta-panel {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    padding: 5rem 3.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--panel-shadow);
}

.cta-headline {
    font-size: clamp(2rem, 3.5vw, 2.875rem);
    font-weight: 300;
    color: var(--ink);
    margin-bottom: 1.25rem;
    position: relative;
    z-index: 2;
}

.cta-lead {
    font-size: 1.125rem;
    color: var(--text);
    margin-bottom: 2.25rem;
    max-width: 580px;
    margin-inline: auto;
    position: relative;
    z-index: 2;
}

.cta-actions {
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* Sweeping Lilac to Sky Gradient Arc */
.cta-gradient-arc {
    position: absolute;
    bottom: -150px;
    left: 50%;
    transform: translateX(-50%);
    width: 120%;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(ellipse at center, rgba(215, 160, 223, 0.45) 0%, rgba(220, 231, 255, 0.4) 50%, transparent 80%);
    pointer-events: none;
    z-index: 1;
    animation: driftArc 20s ease-in-out infinite alternate;
}

@keyframes driftArc {
    0% { transform: translateX(-52%) scale(1); }
    100% { transform: translateX(-48%) scale(1.05); }
}

/* ==========================================================================
   14. FOOTER
   ========================================================================== */
.site-footer {
    border-top: 1px solid var(--line);
    background: var(--bg);
    padding: 5rem 1.5rem 3rem;
    margin-top: 5rem;
}

.footer-container {
    max-width: var(--container-max);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.2fr 2fr;
    gap: 4rem;
    margin-bottom: 3.5rem;
}

.footer-brand-link {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--ink);
    font-weight: 600;
    letter-spacing: 0.08em;
    margin-bottom: 1.25rem;
}

.footer-tagline {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--ink);
    margin-bottom: 0.75rem;
}

.footer-lineage {
    font-size: 0.8125rem;
    color: var(--muted);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    max-width: 380px;
}

.portal-isolation-notice {
    display: inline-flex;
    align-items: flex-start;
    gap: 0.625rem;
    background: var(--mist);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: 0.875rem 1rem;
    font-size: 0.75rem;
    color: var(--text);
    max-width: 380px;
    line-height: 1.5;
}

.footer-nav-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.footer-heading {
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-caps);
    color: var(--ink);
    margin-bottom: 1.25rem;
}

html[dir="rtl"] .footer-heading {
    text-transform: none;
    font-size: 0.9375rem;
}

.footer-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-list a {
    font-size: 0.875rem;
    color: var(--text);
    transition: color 0.15s ease;
}

.footer-list a:hover {
    color: var(--ink);
}

.draft-tag {
    font-size: 0.6875rem;
    color: var(--muted);
    border: 1px solid var(--line);
    padding: 0.1rem 0.4rem;
    border-radius: var(--radius-sm);
}

.compliance-text {
    font-size: 0.8125rem;
    color: var(--muted);
    line-height: 1.4;
}

.footer-bottom {
    max-width: var(--container-max);
    margin: 0 auto;
    padding-top: 2rem;
    border-top: 1px solid var(--line-subtle);
}

.footer-bottom-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    flex-wrap: wrap;
    font-size: 0.75rem;
    color: var(--muted);
}

/* ==========================================================================
   15. INTERACTIVE SIMULATION & TELEMETRY STYLES
   ========================================================================== */
.simulation-layout {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 2rem;
    align-items: flex-start;
}

.device-frame {
    background: var(--surface);
    border: 2px solid var(--line);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--panel-shadow);
}

.device-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--line);
}

.target-64px {
    min-height: 64px;
    padding: 1rem 1.5rem;
    font-size: 1.125rem;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border: 1.5px solid var(--line);
    background: var(--surface);
    cursor: pointer;
    transition: all 0.15s ease;
}

.target-64px:hover {
    border-color: var(--ink);
    background: var(--mist);
}

.telemetry-panel {
    background: var(--mist);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 2rem;
}

/* ==========================================================================
   16. RESPONSIVE BREAKPOINTS & MOBILE NAVIGATION
   ========================================================================== */
@media (max-width: 1024px) {
    .hero-relief-panel {
        grid-template-columns: 1fr;
        min-height: auto;
        padding: 3rem 2rem;
    }
    .hero-contour-col {
        position: relative;
        width: 100%;
        height: 320px;
        order: -1;
        margin-bottom: 2rem;
    }
    .stats-ribbon-card {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    .stat-item:nth-child(2) {
        border-inline-end: none;
    }
    .footer-container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    .footer-nav-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .lifecycle-timeline {
        grid-template-columns: repeat(2, 1fr);
    }
    .simulation-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .desktop-nav,
    .portal-nav-link {
        display: none;
    }
    .btn-mobile-menu {
        display: flex;
    }
    .grid-3, .grid-2, .two-paths-grid {
        grid-template-columns: 1fr;
    }
    .stats-ribbon-card {
        grid-template-columns: 1fr;
    }
    .stat-item {
        border-inline-end: none;
        border-bottom: 1px solid var(--line-subtle);
        padding-bottom: 1rem;
    }
    .stat-item:last-child {
        border-bottom: none;
        padding-bottom: 0;
    }
    .logo-strip {
        grid-template-columns: repeat(3, 1fr);
    }
    .notched-panel {
        padding: 2rem 1.5rem;
    }
    .tab-content-pane {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .lifecycle-timeline {
        grid-template-columns: 1fr;
    }
    .handover-block {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    .handover-triad {
        flex-direction: column;
        gap: 0.75rem;
    }
}

/* Mobile Drawer */
.mobile-nav-drawer {
    position: fixed;
    top: 65px;
    inset-inline-start: 0;
    inset-inline-end: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 1.5rem;
    box-shadow: 0 16px 32px rgba(18, 23, 43, 0.1);
    z-index: 999;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.mobile-nav-link {
    font-size: 1rem;
    font-weight: 500;
    color: var(--ink);
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--line-subtle);
}

/* ==========================================================================
   17. ACCESSIBILITY OVERRIDES & REDUCED MOTION
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    .cta-gradient-arc,
    .floating-chip {
        animation: none !important;
    }
}