/* ==========================================================================
   FlightDeck Design System & Developer Visual Identity
   Inherits foundational tokens from ../style.css
   ========================================================================== */

:root {
    /* Aerospace Cyan & Technical Palette */
    --fd-cyan-primary: #38bdf8;
    --fd-cyan-hover: #0ea5e9;
    --fd-cyan-bright: #7dd3fc;
    --fd-cyan-glow: rgba(56, 189, 248, 0.16);
    --fd-cyan-dim: rgba(56, 189, 248, 0.08);
    --fd-cyan-border: rgba(56, 189, 248, 0.22);
    --fd-cyan-border-hover: rgba(56, 189, 248, 0.45);

    /* Complementary Technical Tones */
    --fd-indigo: #6366f1;
    --fd-indigo-glow: rgba(99, 102, 241, 0.16);
    --fd-status-emerald: #10b981;
    --fd-status-emerald-dim: rgba(16, 185, 129, 0.12);
    --fd-status-amber: #f59e0b;
    --fd-status-amber-dim: rgba(245, 158, 11, 0.12);

    /* Surfaces & Containers */
    --fd-bg-base: #0a0d12;
    --fd-card-surface: #111620;
    --fd-card-surface-hover: #161e2b;
    --fd-card-elevated: #182232;
    --fd-border-hairline: rgba(255, 255, 255, 0.06);
    --fd-border-medium: rgba(255, 255, 255, 0.12);

    /* Typography */
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: ui-monospace, 'SF Mono', SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;

    /* Radii & Shadows */
    --fd-radius-sm: 8px;
    --fd-radius-md: 14px;
    --fd-radius-lg: 22px;
    --fd-radius-xl: 30px;
    --fd-shadow-soft: 0 12px 36px -8px rgba(0, 0, 0, 0.5);
    --fd-shadow-glow: 0 0 40px -10px rgba(56, 189, 248, 0.25);
}

/* Base Adjustments */
html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--fd-bg-base);
    color: var(--text-primary);
    font-family: var(--font-heading);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Focus Visible Accessibility */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--fd-cyan-primary);
    outline-offset: 3px;
}

/* Atmospheric Gradients */
.background-atmosphere {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    pointer-events: none;
    z-index: -1;
    background: 
        radial-gradient(ellipse 900px 600px at 50% -10%, rgba(56, 189, 248, 0.12), transparent 70%),
        radial-gradient(ellipse 700px 500px at 90% 40%, rgba(99, 102, 241, 0.08), transparent 60%),
        radial-gradient(ellipse 800px 600px at 10% 80%, rgba(14, 165, 233, 0.06), transparent 65%),
        var(--fd-bg-base);
}

.background-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    pointer-events: none;
    z-index: -1;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse at 50% 30%, black 20%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse at 50% 30%, black 20%, transparent 75%);
}

/* Header & Navigation */
.fd-navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 13, 18, 0.82);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--fd-border-hairline);
    transition: var(--transition);
}

.fd-nav-brand {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.3px;
    color: var(--text-primary);
    text-decoration: none;
}

.fd-nav-icon {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4), 0 0 12px rgba(56, 189, 248, 0.25);
    display: block;
}

.fd-nav-badge {
    font-size: 0.72rem;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.6px;
    padding: 0.2rem 0.55rem;
    background: var(--fd-cyan-dim);
    color: var(--fd-cyan-bright);
    border: 1px solid var(--fd-cyan-border);
    border-radius: 6px;
    font-weight: 600;
}

.fd-nav-links {
    display: flex;
    align-items: center;
    gap: 1.75rem;
}

.fd-nav-link {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
}

.fd-nav-link:hover {
    color: var(--fd-cyan-bright);
}

.fd-nav-link.active {
    color: var(--text-primary);
    font-weight: 600;
}

.fd-nav-back {
    color: var(--text-secondary);
    font-size: 0.88rem;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.8rem;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--fd-border-hairline);
    transition: var(--transition);
}

.fd-nav-back:hover {
    color: var(--text-primary);
    border-color: var(--fd-border-medium);
    background: rgba(255, 255, 255, 0.06);
}

/* Hero Section */
.fd-hero {
    width: 100%;
    padding: 5rem 5% 4rem;
    text-align: center;
    position: relative;
    max-width: 1280px;
    margin: 0 auto;
    box-sizing: border-box;
}

.fd-hero-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.4rem 1.1rem;
    background: var(--fd-cyan-dim);
    border: 1px solid var(--fd-cyan-border);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--fd-cyan-bright);
    margin-bottom: 2rem;
    box-shadow: 0 0 20px -5px rgba(56, 189, 248, 0.2);
}

.fd-pulse-dot {
    width: 8px;
    height: 8px;
    background-color: var(--fd-status-emerald);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--fd-status-emerald);
}

.fd-hero-title {
    font-size: 4.2rem;
    line-height: 1.08;
    font-weight: 800;
    letter-spacing: -2px;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.fd-hero-highlight {
    background: linear-gradient(135deg, #ffffff 0%, #7dd3fc 45%, #38bdf8 70%, #6366f1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.fd-hero-subtitle {
    font-size: 1.25rem;
    line-height: 1.7;
    color: var(--text-secondary);
    max-width: 820px;
    margin: 0 auto 2.5rem;
}

/* Call to Action Group */
.fd-cta-group {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 4rem;
}

.fd-cta-store {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: var(--text-primary);
    border: 1px solid var(--fd-cyan-border);
    padding: 0.95rem 1.8rem;
    border-radius: 14px;
    font-weight: 600;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: var(--fd-shadow-soft), 0 0 24px -6px rgba(56, 189, 248, 0.25);
    cursor: default;
    transition: var(--transition);
}

.fd-cta-store:hover {
    border-color: var(--fd-cyan-border-hover);
    transform: translateY(-2px);
    box-shadow: var(--fd-shadow-soft), 0 0 32px -4px rgba(56, 189, 248, 0.4);
}

.fd-cta-store-badge {
    background: var(--fd-cyan-dim);
    color: var(--fd-cyan-bright);
    font-size: 0.72rem;
    font-family: var(--font-mono);
    text-transform: uppercase;
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.fd-cta-secondary {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
    border: 1px solid var(--fd-border-medium);
    padding: 0.95rem 1.8rem;
    border-radius: 14px;
    font-weight: 600;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
    transition: var(--transition);
}

.fd-cta-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
    color: #ffffff;
}

/* Real Product Screenshot Presentation Container */
.fd-screenshot-container {
    width: 100%;
    max-width: 1080px;
    margin: 0 auto;
    position: relative;
    border-radius: 14px;
    box-shadow: 0 24px 64px -12px rgba(0, 0, 0, 0.75), 0 0 40px -10px rgba(56, 189, 248, 0.18);
    border: 1px solid var(--fd-cyan-border);
    overflow: hidden;
    background: #0d121a;
    line-height: 0;
    box-sizing: border-box;
}

.fd-screenshot-img {
    width: 100%;
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 13px;
    aspect-ratio: 1440 / 900;
}


/* Feature & Architecture Sections */
.fd-section {
    width: 100%;
    padding: 6rem 5%;
    max-width: 1280px;
    margin: 0 auto;
    box-sizing: border-box;
}

.fd-section-header {
    text-align: center;
    max-width: 780px;
    margin: 0 auto 4rem;
}

.fd-section-eyebrow {
    color: var(--fd-cyan-bright);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    margin-bottom: 0.75rem;
    display: block;
}

.fd-section-title {
    font-size: 2.75rem;
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -1px;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
}

.fd-section-desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* Feature Grid Cards */
.fd-grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2rem;
}

.fd-card {
    background: var(--fd-card-surface);
    border: 1px solid var(--fd-border-hairline);
    border-radius: var(--fd-radius-lg);
    padding: 2.25rem;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.fd-card:hover {
    background: var(--fd-card-surface-hover);
    border-color: var(--fd-cyan-border);
    transform: translateY(-4px);
    box-shadow: var(--fd-shadow-soft), var(--fd-shadow-glow);
}

.fd-card-icon {
    width: 48px;
    height: 48px;
    background: var(--fd-cyan-dim);
    border: 1px solid var(--fd-cyan-border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--fd-cyan-bright);
    margin-bottom: 1.5rem;
    font-size: 1.35rem;
}

.fd-card-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.85rem;
    letter-spacing: -0.3px;
}

.fd-card-text {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.65;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.fd-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.fd-tag {
    font-size: 0.78rem;
    font-family: var(--font-mono);
    padding: 0.25rem 0.65rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--fd-border-hairline);
    border-radius: 6px;
    color: var(--text-secondary);
}

/* Architecture Comparison Section */
.fd-arch-box {
    background: var(--fd-card-surface);
    border: 1px solid var(--fd-border-hairline);
    border-radius: var(--fd-radius-lg);
    padding: 3rem;
    box-shadow: var(--fd-shadow-soft);
    margin-top: 2rem;
}

.fd-arch-diagram {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 2rem;
    align-items: center;
    padding: 2.5rem;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--fd-border-hairline);
    border-radius: 16px;
    margin: 2.5rem 0;
}

.fd-arch-node {
    background: var(--fd-card-elevated);
    border: 1px solid var(--fd-cyan-border);
    border-radius: 14px;
    padding: 1.5rem;
    text-align: center;
}

.fd-arch-node-title {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 1.15rem;
    margin-bottom: 0.4rem;
}

.fd-arch-node-sub {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--fd-cyan-bright);
}

.fd-arch-arrow {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--fd-cyan-bright);
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.fd-arch-line {
    width: 80px;
    height: 2px;
    background: linear-gradient(90deg, var(--fd-cyan-primary), #6366f1);
    position: relative;
}

.fd-arch-line::after {
    content: '▶';
    position: absolute;
    right: -6px;
    top: -7px;
    font-size: 11px;
    color: #6366f1;
}

/* Privacy Truth Highlights */
.fd-truth-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.75rem;
}

.fd-truth-card {
    background: rgba(255, 255, 255, 0.025);
    border: 1px solid var(--fd-border-hairline);
    border-radius: var(--fd-radius-md);
    padding: 1.75rem;
    position: relative;
    border-left: 3px solid var(--fd-cyan-primary);
}

.fd-truth-card h3,
.fd-truth-card h4 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.6rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.fd-truth-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0;
}

/* Hub Roadmap Preview */
.fd-hub-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
}

.fd-hub-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px dashed var(--fd-border-medium);
    border-radius: var(--fd-radius-md);
    padding: 1.5rem;
    opacity: 0.9;
    transition: var(--transition);
}

.fd-hub-card:hover {
    opacity: 1;
    border-color: var(--fd-cyan-border);
    background: rgba(56, 189, 248, 0.03);
}

.fd-hub-badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-secondary);
    margin-bottom: 0.85rem;
}

.fd-hub-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
}

.fd-hub-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
}

/* ==========================================================================
   Privacy Policy Specific Styles
   ========================================================================== */
.fd-policy-wrapper {
    max-width: 920px;
    margin: 0 auto;
    padding: 3rem 5% 6rem;
}

.fd-policy-card {
    background: var(--fd-card-surface);
    border: 1px solid var(--fd-border-hairline);
    border-radius: var(--fd-radius-xl);
    padding: 3.5rem;
    box-shadow: var(--fd-shadow-soft);
}

.fd-policy-header {
    border-bottom: 1px solid var(--fd-border-hairline);
    padding-bottom: 2rem;
    margin-bottom: 2.5rem;
}

.fd-policy-meta {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.fd-policy-tag {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--fd-cyan-bright);
    background: var(--fd-cyan-dim);
    padding: 0.25rem 0.65rem;
    border-radius: 6px;
    border: 1px solid var(--fd-cyan-border);
}

.fd-policy-date {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.fd-policy-section {
    margin-bottom: 3rem;
}

.fd-policy-section h2 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.fd-policy-section h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 1.5rem 0 0.6rem;
}

.fd-policy-section p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.75;
    margin-bottom: 1.15rem;
}

.fd-policy-section ul {
    margin: 1rem 0 1.5rem 1.5rem;
    color: var(--text-secondary);
}

.fd-policy-section li {
    margin-bottom: 0.65rem;
    line-height: 1.65;
    font-size: 1.02rem;
}

.fd-policy-callout {
    background: var(--fd-cyan-dim);
    border: 1px solid var(--fd-cyan-border);
    border-left: 4px solid var(--fd-cyan-primary);
    border-radius: 10px;
    padding: 1.25rem 1.5rem;
    margin: 1.5rem 0;
}

.fd-policy-callout p {
    color: var(--text-primary);
    font-size: 0.98rem;
    margin: 0;
    line-height: 1.6;
}

.fd-policy-table-wrapper {
    overflow-x: auto;
    margin: 1.5rem 0;
    border-radius: 10px;
    border: 1px solid var(--fd-border-hairline);
}

.fd-policy-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
    text-align: left;
}

.fd-policy-table th {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
    font-weight: 600;
    padding: 0.9rem 1.2rem;
    border-bottom: 1px solid var(--fd-border-hairline);
}

.fd-policy-table td {
    padding: 0.9rem 1.2rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--fd-border-hairline);
    vertical-align: top;
}

.fd-policy-table tr:last-child td {
    border-bottom: none;
}

.fd-code-inline {
    font-family: var(--font-mono);
    font-size: 0.88rem;
    padding: 0.15rem 0.45rem;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--fd-border-hairline);
    border-radius: 4px;
    color: var(--fd-cyan-bright);
}

.fd-link {
    color: var(--fd-cyan-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.fd-link:hover {
    color: var(--fd-cyan-bright);
    text-decoration: underline;
}

/* Footer */
.fd-footer {
    border-top: 1px solid var(--fd-border-hairline);
    padding: 4rem 5% 3rem;
    background: #080a0e;
    color: var(--text-secondary);
    font-size: 0.92rem;
}

.fd-footer-inner {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.fd-footer-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
}

.fd-footer-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.fd-footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.fd-footer-link:hover {
    color: var(--fd-cyan-bright);
}

/* Responsive Media Queries */
@media (max-width: 992px) {
    .fd-hero-title {
        font-size: 3.4rem;
    }
    .fd-arch-diagram {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    .fd-arch-line {
        width: 2px;
        height: 40px;
    }
    .fd-arch-line::after {
        content: '▼';
        top: auto;
        bottom: -6px;
        right: -5px;
    }
}

@media (max-width: 768px) {
    .fd-navbar {
        padding: 1.25rem 4%;
        flex-wrap: wrap;
        gap: 1rem;
    }
    .fd-nav-links {
        gap: 0.75rem 1.25rem;
        flex-wrap: wrap;
    }
    .fd-hero-title {
        font-size: 2.6rem;
        letter-spacing: -1px;
    }
    .fd-hero-subtitle {
        font-size: 1.1rem;
    }
    .fd-policy-card {
        padding: 2rem 1.5rem;
    }
    .fd-arch-box {
        padding: 1.75rem 1rem;
    }
    .fd-arch-diagram {
        padding: 1.5rem 1rem;
    }
    .fd-footer-inner {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .fd-hero-title {
        font-size: 2.15rem;
    }
    .fd-cta-group {
        flex-direction: column;
        width: 100%;
    }
    .fd-cta-store,
    .fd-cta-secondary {
        width: 100%;
        justify-content: center;
    }
}

/* Reduced Motion Accessibility */
@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;
    }
    .fd-card:hover,
    .fd-cta-store:hover,
    .fd-cta-secondary:hover {
        transform: none !important;
    }
}