/* FiftyX Website — Shipyard Design System */

/* ============================================
   Design Tokens
   ============================================ */

:root {
    /* Colors — Dark Mode (default) */
    --bg-primary: #000000;
    --bg-secondary: #111111;
    --bg-tertiary: #1A1A1A;
    --bg-elevated: #111111;
    --text-primary: #FFFFFF;
    --text-secondary: #888888;
    --text-tertiary: #666666;
    --text-disabled: #444444;
    --text-link: #0070F3;
    --accent: #0070F3;
    --accent-hover: #005BC4;
    --success-alt: #50E3C2;
    --error: #EE0000;
    --warning: #F5A623;
    --border-default: #333333;
    --border-subtle: #252525;
    --border-strong: #555555;

    /* Accent line colors (pink-purple-blue spectrum) */
    --line-pink: #ff1e56;
    --line-purple: #a853ba;
    --line-blue: #59a5ff;
    --gradient-line: linear-gradient(to right, transparent, #ff1e5626, #a853ba26, #59a5ff26, transparent);
    --gradient-line-strong: linear-gradient(to right, transparent, #ff1e5640, #a853ba40, #59a5ff40, transparent);
    --gradient-line-card: linear-gradient(135deg, #ff1e5630, #a853ba30, #59a5ff30);

    /* Grid line color */
    --grid-line: rgba(255, 255, 255, 0.03);

    /* Typography */
    --font-sans: 'Geist', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'Geist Mono', 'SF Mono', Menlo, Monaco, Consolas, monospace;

    /* Spacing (4px base) */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-6: 24px;
    --space-8: 32px;
    --space-12: 48px;
    --space-16: 64px;
    --space-24: 96px;

    /* Borders */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;
    --radius-pill: 999px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
    --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.2);

    /* Motion */
    --duration-fast: 150ms;
    --duration-normal: 200ms;
    --duration-slow: 300ms;
    --ease-default: ease;
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --duration-xslow: 500ms;
}

/* Light mode */
@media (prefers-color-scheme: light) {
    :root {
        --bg-primary: #FFFFFF;
        --bg-secondary: #FAFAFA;
        --bg-tertiary: #F5F5F5;
        --bg-elevated: #FFFFFF;
        --text-primary: #000000;
        --text-secondary: #666666;
        --text-tertiary: #999999;
        --text-disabled: #CCCCCC;
        --border-default: #EAEAEA;
        --border-subtle: #F0F0F0;
        --border-strong: #CCCCCC;
        --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.08);
        --grid-line: rgba(0, 0, 0, 0.04);
    }
}

/* ============================================
   Reset & Base
   ============================================ */

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

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

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--text-link);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-default);
}

a:hover {
    color: var(--accent-hover);
}

/* ============================================
   Typography
   ============================================ */

.hero-title {
    font-size: 64px;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.04em;
}

h1 {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.03em;
}

h2 {
    font-size: 36px;
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h3 {
    font-size: 24px;
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.01em;
}

h4 {
    font-size: 20px;
    font-weight: 600;
    line-height: 1.4;
    letter-spacing: -0.01em;
}

.text-small {
    font-size: 14px;
    line-height: 1.5;
}

.text-caption {
    font-size: 12px;
    line-height: 1.5;
    letter-spacing: 0.01em;
}

.text-secondary {
    color: var(--text-secondary);
}

.text-mono {
    font-family: var(--font-mono);
}

/* ============================================
   Layout
   ============================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.section {
    padding: var(--space-24) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.section-header p {
    color: var(--text-secondary);
    font-size: 18px;
    max-width: 600px;
    margin: var(--space-4) auto 0;
}

/* ============================================
   Navigation
   ============================================ */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid transparent;
    border-image: var(--gradient-line) 1;
    z-index: 100;
    display: flex;
    align-items: center;
}

@media (prefers-color-scheme: light) {
    .nav {
        background: rgba(255, 255, 255, 0.8);
    }

}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.nav-logo {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: color var(--duration-fast) var(--ease-default);
}

.nav-links a:hover {
    color: var(--text-primary);
}

.nav-links a.btn-primary {
    color: var(--bg-primary);
}

.nav-links a.btn-primary:hover {
    color: var(--bg-primary);
}

.nav-mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: var(--space-2);
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: background var(--duration-normal) var(--ease-default),
                color var(--duration-normal) var(--ease-default),
                border-color var(--duration-normal) var(--ease-default);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: 0 var(--space-4);
    height: 40px;
}

.btn-primary:hover {
    background: #CCCCCC;
    color: var(--bg-primary);
}

@media (prefers-color-scheme: light) {
    .btn-primary:hover {
        background: #333333;
    }
}

.btn-accent {
    background: linear-gradient(135deg, var(--accent), #5a3dba);
    color: #FFFFFF;
    padding: 0 var(--space-6);
    height: 44px;
    font-size: 15px;
    box-shadow: 0 0 20px rgba(0, 112, 243, 0.2);
}

.btn-accent:hover {
    background: linear-gradient(135deg, var(--accent-hover), #4a2da8);
    color: #FFFFFF;
    box-shadow: 0 0 24px rgba(0, 112, 243, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-default);
    padding: 0 var(--space-4);
    height: 40px;
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--border-strong);
    color: var(--text-primary);
}

.btn-sm {
    height: 36px;
    padding: 0 var(--space-3);
    font-size: 13px;
}

/* ============================================
   Hero
   ============================================ */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-24) var(--space-6);
    padding-top: calc(64px + var(--space-24));
}

.hero-content {
    max-width: 800px;
}

.hero-badge {
    display: inline-block;
    background: var(--bg-secondary);
    border: none;
    border-radius: var(--radius-pill);
    padding: var(--space-1) var(--space-3);
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-8);
    position: relative;
}

.hero-badge::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-pill);
    padding: 1px;
    background: linear-gradient(135deg, var(--line-pink), var(--line-purple), var(--line-blue));
    -webkit-mask:
        linear-gradient(#fff 0 0) content-box,
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
    opacity: 0.5;
}

.hero-badge .dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    background: var(--success-alt);
    border-radius: 50%;
    margin-right: var(--space-2);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero-title {
    margin-bottom: var(--space-6);
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: var(--space-12);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   Problem Section
   ============================================ */

.problem-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
}

.problem-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    transition: border-color var(--duration-fast) var(--ease-default);
}

.problem-card:hover {
    border-color: var(--border-strong);
}

.problem-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
    color: var(--text-secondary);
}

.problem-card h3 {
    margin-bottom: var(--space-3);
}

.problem-card p {
    color: var(--text-secondary);
    font-size: 15px;
}

/* ============================================
   Features (Differentiators)
   ============================================ */

/* Grid background texture on features section */
#features {
    background-image:
        radial-gradient(circle, var(--grid-line) 1px, transparent 1px);
    background-size: 32px 32px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.feature-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    position: relative;
    transition: border-color var(--duration-fast) var(--ease-default),
                box-shadow var(--duration-normal) var(--ease-default);
    box-shadow: inset 0 0.5px 0 0 rgba(255, 255, 255, 0.06);
}

.feature-card:hover {
    border-color: var(--border-strong);
    box-shadow:
        inset 0 0.5px 0 0 rgba(255, 255, 255, 0.1),
        0 4px 12px rgba(0, 0, 0, 0.12),
        0 0 0 1px rgba(168, 83, 186, 0.08);
}

.feature-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
    color: var(--text-secondary);
}

/* Colored accent dots on feature icons — each a different color */
.feature-card:nth-child(1) .feature-icon { color: var(--line-pink); }
.feature-card:nth-child(2) .feature-icon { color: var(--line-purple); }
.feature-card:nth-child(3) .feature-icon { color: var(--line-blue); }
.feature-card:nth-child(4) .feature-icon { color: var(--success-alt); }
.feature-card:nth-child(5) .feature-icon { color: var(--line-pink); }
.feature-card:nth-child(6) .feature-icon { color: var(--line-purple); }
.feature-card:nth-child(7) .feature-icon { color: var(--line-blue); }

.feature-card h3 {
    margin-bottom: var(--space-2);
    font-size: 18px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
}

/* ============================================
   Voice Science
   ============================================ */

.voice-science {
    border-top: 1px solid transparent;
    border-image: var(--gradient-line) 1;
}

.voice-science-inner {
    max-width: 720px;
    margin: 0 auto;
}

.voice-science-inner h2 {
    margin-bottom: var(--space-8);
}

.voice-science-inner p {
    color: var(--text-secondary);
    font-size: 17px;
    line-height: 1.7;
    margin-bottom: var(--space-6);
}

.voice-science-inner p:last-child {
    margin-bottom: 0;
}

.voice-science-inner strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* ============================================
   How It Works
   ============================================ */

#how-it-works {
    border-top: 1px solid transparent;
    border-image: var(--gradient-line) 1;
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
    position: relative;
}

.steps::before {
    content: '';
    position: absolute;
    top: 28px;
    left: calc(16.67% + 28px);
    right: calc(16.67% + 28px);
    height: 1px;
    background: linear-gradient(to right, var(--line-pink), var(--line-purple), var(--line-blue));
    opacity: 0.3;
}

.step {
    text-align: center;
}

.step-number {
    width: 56px;
    height: 56px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    border-radius: 50%;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: var(--space-6);
    position: relative;
    z-index: 1;
    box-shadow: inset 0 0.5px 0 0 rgba(255, 255, 255, 0.06);
}

.step:nth-child(1) .step-number { color: var(--line-pink); }
.step:nth-child(2) .step-number { color: var(--line-purple); }
.step:nth-child(3) .step-number { color: var(--line-blue); }

.step h3 {
    margin-bottom: var(--space-2);
}

.step p {
    color: var(--text-secondary);
    font-size: 15px;
    max-width: 280px;
    margin: 0 auto;
}

/* ============================================
   Comparison Table
   ============================================ */

.comparison-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    min-width: 700px;
}

.comparison-table th,
.comparison-table td {
    padding: var(--space-3) var(--space-4);
    text-align: left;
    border-bottom: 1px solid var(--border-subtle);
}

.comparison-table th {
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    background: var(--bg-secondary);
}

.comparison-table th:first-child {
    border-top-left-radius: var(--radius-lg);
}

.comparison-table th:last-child {
    border-top-right-radius: var(--radius-lg);
}

.comparison-table td {
    color: var(--text-secondary);
}

.comparison-table td:first-child {
    color: var(--text-primary);
    font-weight: 500;
}

.comparison-table .highlight {
    color: var(--text-primary);
    font-weight: 500;
}

.comparison-table .check {
    color: var(--success-alt);
}

.comparison-table .cross {
    color: var(--text-tertiary);
}

/* ============================================
   Privacy Section
   ============================================ */

#privacy {
    border-top: 1px solid transparent;
    border-image: var(--gradient-line) 1;
}

.privacy-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
}

.privacy-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    box-shadow: inset 0 0.5px 0 0 rgba(255, 255, 255, 0.06);
}

.privacy-card h3 {
    margin-bottom: var(--space-3);
}

.privacy-card p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
}

.privacy-list {
    list-style: none;
    margin-top: var(--space-4);
}

.privacy-list li {
    color: var(--text-secondary);
    font-size: 15px;
    padding: var(--space-2) 0;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.privacy-list li::before {
    content: '→';
    color: var(--text-tertiary);
}

/* ============================================
   CTA Section
   ============================================ */

.cta {
    text-align: center;
    padding: var(--space-24) 0;
    border-top: 1px solid transparent;
    border-image: var(--gradient-line) 1;
}

.cta h2 {
    margin-bottom: var(--space-4);
}

.cta p {
    color: var(--text-secondary);
    font-size: 18px;
    margin-bottom: var(--space-8);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   Footer
   ============================================ */

.footer {
    border-top: 1px solid transparent;
    border-image: var(--gradient-line) 1;
    padding: var(--space-12) 0;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-left {
    color: var(--text-tertiary);
    font-size: 14px;
}

.footer-links {
    display: flex;
    gap: var(--space-6);
    list-style: none;
}

.footer-links a {
    color: var(--text-tertiary);
    font-size: 14px;
}

.footer-links a:hover {
    color: var(--text-primary);
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 1024px) {
    .hero-title {
        font-size: 48px;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .steps::before {
        display: none;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 17px;
    }

    h2 {
        font-size: 28px;
    }

    .section {
        padding: var(--space-16) 0;
    }

    .section-header {
        margin-bottom: var(--space-12);
    }

    .problem-grid,
    .features-grid,
    .steps {
        grid-template-columns: 1fr;
    }

    .privacy-grid {
        grid-template-columns: 1fr;
    }

    .nav-links {
        display: none;
    }

    .nav-mobile-toggle {
        display: block;
    }

    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        border-bottom: 1px solid var(--border-default);
        padding: var(--space-4) var(--space-6);
        gap: var(--space-4);
    }

    .footer-inner {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
}

/* ============================================
   Light Mode — card/line overrides
   ============================================ */

@media (prefers-color-scheme: light) {
    .feature-card,
    .privacy-card,
    .step-number {
        box-shadow: inset 0 0.5px 0 0 rgba(255, 255, 255, 0.8);
    }

    .feature-card:hover {
        box-shadow:
            inset 0 0.5px 0 0 rgba(255, 255, 255, 0.9),
            0 4px 12px rgba(0, 0, 0, 0.04),
            0 0 0 1px rgba(168, 83, 186, 0.06);
    }

    .btn-accent {
        box-shadow: 0 0 20px rgba(0, 112, 243, 0.12);
    }

    .btn-accent:hover {
        box-shadow: 0 0 24px rgba(0, 112, 243, 0.18);
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 32px;
    }

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

    .container {
        padding: 0 var(--space-4);
    }
}