/* ========================================
   Prometheus Promotional Website
   Matching Extension Design System
   ======================================== */

/* CSS Custom Properties */
:root {
    /* Monochrome Palette */
    --black: #0a0a0a;
    --charcoal: #1a1a1a;
    --graphite: #2d2d2d;
    --slate: #4a4a4a;
    --stone: #6b6b6b;
    --silver: #9a9a9a;
    --ash: #c4c4c4;
    --pearl: #e8e8e8;
    --ivory: #f5f5f5;
    --white: #fafafa;

    /* Typography */
    --font-serif: 'Cormorant Garamond', Georgia, serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    --space-4xl: 96px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);

    /* Transitions */
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --transition-fast: 150ms;
    --transition-base: 250ms;
    --transition-slow: 400ms;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-weight: 400;
    font-size: 16px;
    line-height: 1.6;
    color: var(--charcoal);
    background-color: var(--white);
}

/* Typography */
h1, h2, h3, h4 {
    font-family: var(--font-serif);
    font-weight: 400;
    line-height: 1.2;
}

p {
    color: var(--slate);
}

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

/* Container */
section {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-4xl) var(--space-lg);
}

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

.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: var(--space-3xl);
    padding-top: var(--space-3xl);
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.logo {
    margin-bottom: var(--space-xl);
}

.logo-mark {
    font-family: var(--font-serif);
    font-size: 3.5rem;
    font-weight: 300;
    color: var(--black);
    display: block;
    line-height: 1;
}

.logo-mark.small {
    font-size: 1.5rem;
}

.hero-title {
    font-size: 4rem;
    font-weight: 300;
    letter-spacing: -0.02em;
    color: var(--black);
    margin-bottom: var(--space-md);
}

.hero-tagline {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-style: italic;
    font-weight: 300;
    color: var(--stone);
    margin-bottom: var(--space-md);
}

.hero-description {
    font-size: 1.125rem;
    color: var(--slate);
    max-width: 480px;
    margin-bottom: var(--space-xl);
    line-height: 1.7;
}

/* CTA Button */
.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--black);
    color: var(--white);
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 500;
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base) var(--ease-out);
    cursor: pointer;
    border: none;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
    background: var(--charcoal);
}

.cta-button:active {
    transform: translateY(0);
}

.cta-button.large {
    font-size: 1.125rem;
    padding: var(--space-lg) var(--space-xl);
}

.chrome-icon {
    width: 20px;
    height: 20px;
}

.cta-subtext {
    margin-top: var(--space-sm);
    font-size: 0.875rem;
    color: var(--silver);
}

/* Hero Visual / Mockup */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.mockup-container {
    perspective: 1000px;
}

.mockup-card {
    width: 320px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--pearl);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotateX(2deg) rotateY(-2deg); }
    50% { transform: translateY(-20px) rotateX(0deg) rotateY(0deg); }
}

.mockup-header {
    display: flex;
    gap: 6px;
    padding: var(--space-sm) var(--space-md);
    background: var(--ivory);
    border-bottom: 1px solid var(--pearl);
}

.mockup-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--ash);
}

.mockup-content {
    padding: var(--space-lg);
}

.mockup-image {
    width: 100%;
    height: 180px;
    background: linear-gradient(135deg, var(--pearl) 0%, var(--ash) 100%);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-lg);
    position: relative;
    overflow: hidden;
}

.mockup-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.4) 50%, transparent 100%);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.mockup-analysis {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.mockup-title-skeleton {
    height: 24px;
    width: 70%;
    background: var(--ivory);
    border-radius: var(--radius-sm);
}

.mockup-text-skeleton {
    height: 14px;
    width: 100%;
    background: var(--pearl);
    border-radius: var(--radius-sm);
}

.mockup-text-skeleton.short {
    width: 60%;
}

/* ========================================
   Section Headers
   ======================================== */

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 400;
    color: var(--black);
    margin-bottom: var(--space-sm);
}

.section-subtitle {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-style: italic;
    color: var(--stone);
}

/* ========================================
   Features Section
   ======================================== */

.features {
    background: var(--ivory);
    border-radius: 0;
    max-width: 100%;
    padding: var(--space-4xl) var(--space-lg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: var(--white);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--pearl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base) var(--ease-out);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--ivory);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.feature-icon svg {
    width: 24px;
    height: 24px;
    color: var(--charcoal);
}

.feature-title {
    font-size: 1.25rem;
    color: var(--black);
    margin-bottom: var(--space-sm);
}

.feature-description {
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--slate);
}

/* ========================================
   Analysis Preview Section
   ======================================== */

.analysis-preview {
    padding: var(--space-4xl) var(--space-lg);
}

.analysis-showcase {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    max-width: 900px;
    margin: 0 auto;
}

.analysis-item {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--white);
    border: 1px solid var(--pearl);
    border-radius: var(--radius-md);
    transition: all var(--transition-base) var(--ease-out);
}

.analysis-item:hover {
    border-color: var(--ash);
    box-shadow: var(--shadow-md);
}

.analysis-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--ivory);
    border-radius: var(--radius-sm);
}

.analysis-icon svg {
    width: 22px;
    height: 22px;
    color: var(--graphite);
}

.analysis-content {
    flex: 1;
}

.analysis-label {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    color: var(--black);
    margin-bottom: var(--space-xs);
}

.analysis-text {
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--stone);
}

/* ========================================
   Pinterest Section
   ======================================== */

.pinterest-section {
    background: linear-gradient(180deg, var(--charcoal) 0%, var(--graphite) 100%);
    max-width: 100%;
    padding: var(--space-4xl) var(--space-lg);
}

.pinterest-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.pinterest-badge {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    margin: 0 auto var(--space-lg);
}

.pinterest-badge svg {
    width: 28px;
    height: 28px;
    color: var(--white);
}

.pinterest-title {
    font-size: 2rem;
    color: var(--white);
    margin-bottom: var(--space-md);
}

.pinterest-description {
    font-size: 1.0625rem;
    color: var(--silver);
    line-height: 1.7;
}

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

.final-cta {
    padding: var(--space-4xl) var(--space-lg);
    text-align: center;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.5rem;
    color: var(--black);
    margin-bottom: var(--space-md);
}

.cta-description {
    font-size: 1.125rem;
    color: var(--slate);
    margin-bottom: var(--space-xl);
    line-height: 1.7;
}

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

.footer {
    padding: var(--space-3xl) var(--space-lg);
    border-top: 1px solid var(--pearl);
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.footer-brand {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--black);
}

.footer-tagline {
    font-family: var(--font-serif);
    font-size: 0.9375rem;
    font-style: italic;
    color: var(--stone);
}

.footer-nav {
    margin-top: var(--space-md);
}

.footer-link {
    font-size: 0.875rem;
    color: var(--silver);
    transition: color var(--transition-fast) var(--ease-out);
}

.footer-link:hover {
    color: var(--charcoal);
}

/* Preview Stack Layout */
.preview-stack {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

/* Extension Preview Mockup */
.extension-preview {
    width: 320px;
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl), 0 0 0 1px rgba(0, 0, 0, 0.03);
    overflow: hidden;
    font-family: var(--font-sans);
    flex-shrink: 0;
}

.ext-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
}

.ext-logo {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 300;
    font-style: italic;
    color: var(--slate);
    letter-spacing: 0.02em;
}

.ext-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--ivory);
    border: 1px solid var(--pearl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 0.875rem;
    color: var(--charcoal);
    cursor: pointer;
    transition: all 150ms var(--ease-out);
}

.ext-avatar:hover {
    background: var(--pearl);
    border-color: var(--ash);
}

.ext-hero {
    text-align: center;
    padding: 8px 20px 20px;
}

.ext-hero-title {
    display: block;
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: 400;
    color: var(--black);
}

.ext-hero-subtitle {
    display: block;
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-style: italic;
    font-weight: 300;
    color: var(--slate);
}

.ext-actions {
    display: flex;
    gap: 10px;
    padding: 0 20px 20px;
}

.ext-action-card {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px 8px;
    background: var(--white);
    border: 1px solid var(--pearl);
    border-radius: var(--radius-md);
    color: var(--slate);
    cursor: pointer;
    transition: all 200ms var(--ease-out);
    position: relative;
}

.ext-action-card:hover {
    background: var(--ivory);
    border-color: var(--ash);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.ext-action-card.has-badge {
    padding-top: 24px;
}

.ext-dev-badge {
    position: absolute;
    top: -8px;
    left: 50%;
    transform: translateX(-50%);
    background: #d4a857;
    color: white;
    font-size: 0.5rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 3px 8px;
    border-radius: 10px;
    white-space: nowrap;
}

.ext-action-card svg {
    width: 22px;
    height: 22px;
}

.ext-action-card span:not(.ext-dev-badge) {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--charcoal);
}

.ext-recent {
    padding: 0 20px 16px;
}

.ext-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.ext-section-title {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 400;
    color: var(--black);
}

.ext-section-link {
    font-size: 0.75rem;
    color: var(--silver);
    cursor: pointer;
    transition: color 150ms var(--ease-out);
}

.ext-section-link:hover {
    color: var(--charcoal);
}

.ext-recent-list {
    background: var(--white);
    border: 1px solid var(--pearl);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.ext-recent-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    cursor: pointer;
    transition: background 150ms var(--ease-out);
}

.ext-recent-item:hover {
    background: var(--ivory);
}

.ext-recent-item:not(:last-child) {
    border-bottom: 1px solid var(--pearl);
}

.ext-recent-thumb {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    flex-shrink: 0;
}

.ext-recent-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.ext-recent-name {
    font-family: var(--font-serif);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--black);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.ext-recent-date {
    font-size: 0.75rem;
    color: var(--silver);
}

.ext-nav {
    display: flex;
    border-top: 1px solid var(--pearl);
    background: var(--white);
}

.ext-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 12px;
    color: var(--silver);
    cursor: pointer;
    transition: color 150ms var(--ease-out);
}

.ext-nav-item:hover {
    color: var(--slate);
}

.ext-nav-item.active {
    color: var(--charcoal);
}

.ext-nav-item.active:hover {
    color: var(--charcoal);
}

.ext-nav-item.active::after {
    content: '';
    width: 4px;
    height: 4px;
    background: var(--charcoal);
    border-radius: 50%;
    margin-top: 2px;
}

.ext-nav-item span {
    font-size: 0.6875rem;
    font-weight: 500;
}

/* Runway References Preview */
.ext-image-bar {
    height: 12px;
    background: var(--pearl);
    margin: 0 20px 20px;
    border-radius: 6px;
}

.ext-references {
    padding: 0 20px 20px;
}

.ext-ref-title {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--black);
    margin-bottom: 4px;
}

.ext-ref-subtitle {
    font-size: 0.8125rem;
    color: var(--silver);
    margin-bottom: 16px;
}

.ext-runway-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.ext-runway-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--white);
    border: 1px solid var(--pearl);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 150ms var(--ease-out);
}

.ext-runway-item:hover {
    background: var(--ivory);
    border-color: var(--ash);
}

.ext-runway-icon {
    width: 48px;
    height: 48px;
    background: var(--charcoal);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--white);
    flex-shrink: 0;
}

.ext-runway-info {
    flex: 1;
    min-width: 0;
}

.ext-runway-designer {
    display: block;
    font-family: var(--font-serif);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--black);
}

.ext-runway-collection {
    display: block;
    font-size: 0.8125rem;
    color: var(--silver);
}

.ext-runway-arrow {
    color: var(--silver);
    font-size: 1rem;
    transition: transform 150ms var(--ease-out);
}

.ext-runway-item:hover .ext-runway-arrow {
    transform: translateX(3px);
    color: var(--slate);
}

.ext-action-buttons {
    display: flex;
    gap: 10px;
}

.ext-btn-primary {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--charcoal);
    color: var(--white);
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 150ms var(--ease-out);
}

.ext-btn-primary:hover {
    background: var(--black);
    transform: translateY(-1px);
}

.ext-btn-secondary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    background: var(--white);
    color: var(--charcoal);
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 500;
    border: 1px solid var(--pearl);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 150ms var(--ease-out);
}

.ext-btn-secondary:hover {
    background: var(--ivory);
    border-color: var(--ash);
}

/* Fullpage Hero Variant */
.hero.hero-fullpage {
    min-height: calc(100vh - 80px);
}

/* Minimal Footer Variant */
.footer.footer-minimal {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-lg);
    border-top: none;
    background: transparent;
}

.footer.footer-minimal .footer-content {
    flex-direction: row;
    justify-content: center;
}

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

@media (max-width: 1200px) {
    .preview-stack {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        min-height: auto;
        text-align: center;
        padding-top: var(--space-3xl);
    }

    .hero-content {
        align-items: center;
    }

    .hero-description {
        text-align: center;
    }

    .hero-visual {
        order: -1;
    }

    .preview-stack {
        flex-direction: row;
        gap: 16px;
    }

    .extension-preview {
        width: 280px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
    }

    .analysis-showcase {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    section {
        padding: var(--space-3xl) var(--space-md);
    }

    .hero-title {
        font-size: 2.75rem;
    }

    .hero-tagline {
        font-size: 1.25rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .preview-stack {
        flex-direction: column;
        gap: 20px;
    }

    .extension-preview {
        width: 300px;
    }

    .preview-runway {
        display: none;
    }

    .ext-hero-title,
    .ext-hero-subtitle {
        font-size: 1.5rem;
    }

    .cta-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.25rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .cta-button {
        width: 100%;
        justify-content: center;
    }

    .analysis-item {
        flex-direction: column;
        text-align: center;
    }

    .analysis-icon {
        margin: 0 auto;
    }
}