/* ==========================================================================
   Live Interpreter – Marketing Site Styles
   Dark theme with aquamarine accent
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (from UniversalTranslator app)
   -------------------------------------------------------------------------- */
:root {
    /* Dark backgrounds */
    --bg-0: #05060a;
    --bg-1: #0a0e16;
    --bg-2: #0c1220;
    --bg-3: #141e30;
    --bg-4: #1a2744;

    /* Text colors */
    --text: #eef2f7;
    --text-dim: rgba(238, 242, 247, 0.72);
    --text-faint: rgba(238, 242, 247, 0.42);

    /* Accent colors */
    --accent: #7fffd4;
    --accent-hover: #5ce0b8;
    --accent-dim: rgba(127, 255, 212, 0.15);

    /* Borders & glass */
    --stroke: rgba(255, 255, 255, 0.10);
    --stroke-accent: rgba(127, 255, 212, 0.3);
    --glass: rgba(255, 255, 255, 0.06);

    /* Typography */
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    --font-mono: "SF Mono", SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;

    /* Layout */
    --max-width: 1120px;
    --nav-height: 64px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-height) + 2rem);
}

body {
    font-family: var(--font-stack);
    font-size: 17px;
    line-height: 1.6;
    color: var(--text);
    background-color: var(--bg-1);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Focus styles */
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

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

ul, ol {
    list-style: none;
}

img, svg {
    display: block;
    max-width: 100%;
}

button {
    font: inherit;
    color: inherit;
    background: none;
    border: none;
    cursor: pointer;
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.section {
    padding: var(--space-2xl) 0;
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    margin-bottom: var(--space-lg);
}

.section-intro {
    max-width: 640px;
    margin-bottom: var(--space-xl);
}

.section-lead {
    font-size: 1.125rem;
    color: var(--text-dim);
    margin-top: var(--space-sm);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.5rem;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: 2px;
    transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.btn-primary {
    background-color: var(--accent);
    color: var(--bg-0);
}

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

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.btn-secondary {
    color: var(--accent);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.btn-secondary:hover {
    color: var(--text);
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(10, 14, 22, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--stroke);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--nav-height);
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--accent);
}

.nav-logo {
    height: 32px;
    width: auto;
}

.nav-links {
    display: none;
    gap: var(--space-md);
}

.nav-link {
    font-size: 0.9375rem;
    color: var(--text-dim);
    transition: color var(--transition-fast);
}

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

.nav-ctas {
    display: none;
    align-items: center;
    gap: var(--space-sm);
}

/* Mobile menu toggle */
.nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 24px;
    height: 24px;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--text);
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle[aria-expanded="true"] span:first-child {
    transform: translateY(3.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
    transform: translateY(-3.5px) rotate(-45deg);
}

/* Mobile menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-1);
    z-index: 99;
    padding: var(--space-lg) var(--space-md);
}

.mobile-menu[aria-hidden="false"] {
    display: block;
}

.mobile-menu-inner {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.mobile-link {
    font-size: 1.25rem;
    font-weight: 500;
    padding: var(--space-xs) 0;
    border-bottom: 1px solid var(--stroke);
}

.mobile-ctas {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

/* Desktop nav */
@media (min-width: 768px) {
    .nav-links {
        display: flex;
    }

    .nav-ctas {
        display: flex;
    }

    .nav-toggle {
        display: none;
    }

    .mobile-menu {
        display: none !important;
    }
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero {
    padding: var(--space-2xl) 0;
    background: linear-gradient(180deg, var(--bg-2) 0%, var(--bg-1) 100%);
}

.hero-grid {
    display: grid;
    gap: var(--space-xl);
    align-items: center;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3rem);
    letter-spacing: -0.03em;
    max-width: 560px;
}

.hero-sub {
    font-size: 1.125rem;
    color: var(--text-dim);
    margin-top: var(--space-md);
    max-width: 480px;
}

.hero-proof-inline {
    margin-top: var(--space-lg);
    font-size: 0.9375rem;
    color: var(--text-dim);
    letter-spacing: 0.01em;
}

.hero-ctas {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-sm) var(--space-md);
    margin-top: var(--space-lg);
}

/* Hero media */
.hero-media {
    display: none;
}

.hero-image {
    width: 100%;
    height: auto;
    border-radius: 4px;
    object-fit: cover;
}

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

    .hero-media {
        display: block;
    }
}

/* --------------------------------------------------------------------------
   Media Placeholders
   -------------------------------------------------------------------------- */
.media-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-3);
    border: 1px dashed var(--stroke-accent);
    border-radius: 4px;
    overflow: hidden;
}

.media-placeholder-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-lg);
    text-align: center;
}

.media-icon {
    width: 48px;
    height: 48px;
    color: var(--accent);
    opacity: 0.6;
}

.media-icon--lg {
    width: 64px;
    height: 64px;
}

.media-label {
    font-size: 0.875rem;
    color: var(--text-dim);
    max-width: 280px;
}

.media-dimensions {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--text-faint);
}

/* Hero placeholder */
.media-placeholder--hero {
    aspect-ratio: 4 / 3;
    width: 100%;
}

/* Full-width video placeholder */
.media-placeholder--video-full {
    aspect-ratio: 16 / 9;
    width: 100%;
    max-height: 600px;
}

/* Full-width image placeholder */
.media-placeholder--image-full {
    aspect-ratio: 21 / 9;
    width: 100%;
    min-height: 300px;
    max-height: 500px;
}

/* Feature placeholder */
.media-placeholder--feature {
    aspect-ratio: 3 / 2;
    width: 100%;
}

/* Step placeholder */
.media-placeholder--step {
    aspect-ratio: 4 / 3;
    width: 100%;
    margin-bottom: var(--space-md);
}

/* Video placeholder */
.media-placeholder--video {
    aspect-ratio: 16 / 9;
    width: 100%;
}

.video-embed {
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: 4px;
    overflow: hidden;
    background-color: var(--bg-3);
    border: 1px solid var(--stroke);
}

.video-embed iframe {
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
}

/* Use case placeholder */
.media-placeholder--usecase {
    aspect-ratio: 16 / 10;
    width: 100%;
}

/* --------------------------------------------------------------------------
   Media Sections (full-width)
   -------------------------------------------------------------------------- */
.media-section {
    padding: 0;
}

.media-section-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.media-section--image {
    background-color: var(--bg-0);
}

.fullwidth-image {
    width: 100%;
    height: auto;
    max-height: 500px;
    object-fit: cover;
}

/* --------------------------------------------------------------------------
   Features Grid
   -------------------------------------------------------------------------- */
.content-with-image {
    display: grid;
    gap: var(--space-lg);
    align-items: center;
}

.section-image {
    margin-bottom: 0;
}

.feature-hero-image {
    width: 100%;
    height: auto;
    border-radius: 4px;
    max-height: 480px;
    object-fit: cover;
}

.section-text {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--text-dim);
    max-width: 640px;
}

@media (min-width: 900px) {
    .content-with-image {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-xl);
    }
}

.features-grid {
    display: grid;
    gap: var(--space-lg);
}

.feature-card {
    padding: var(--space-lg);
    background-color: var(--glass);
    border: 1px solid var(--stroke);
    border-radius: 4px;
    transition: border-color var(--transition-fast);
}

.feature-card:hover {
    border-color: var(--stroke-accent);
}

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

.feature-card p {
    color: var(--text-dim);
}

@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* --------------------------------------------------------------------------
   Steps
   -------------------------------------------------------------------------- */
.steps {
    display: grid;
    gap: var(--space-lg);
}

.step {
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--stroke);
}

.step:last-child {
    padding-bottom: 0;
    border-bottom: none;
}

.step-media {
    margin-bottom: var(--space-md);
    border-radius: 4px;
    overflow: hidden;
}

.step-image {
    width: 100%;
    height: auto;
    aspect-ratio: 4 / 3;
    object-fit: cover;
}

.step-num {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    font-family: var(--font-mono);
    color: var(--accent);
    margin-bottom: var(--space-xs);
}

.step-title {
    font-size: 1.125rem;
    margin-bottom: var(--space-xs);
}

.step p {
    color: var(--text-dim);
}

@media (min-width: 768px) {
    .steps {
        grid-template-columns: repeat(3, 1fr);
        gap: 0;
    }

    .step {
        padding: 0 var(--space-lg);
        border-bottom: none;
        border-right: 1px solid var(--stroke);
    }

    .step:first-child {
        padding-left: 0;
    }

    .step:last-child {
        padding-right: 0;
        border-right: none;
    }
}

/* --------------------------------------------------------------------------
   Demo Section
   -------------------------------------------------------------------------- */
.section-demo {
    background-color: var(--bg-2);
}

.demo-grid {
    display: grid;
    gap: var(--space-xl);
    align-items: center;
}

.demo-content .section-title {
    margin-bottom: var(--space-sm);
}

.demo-content .section-lead {
    margin-top: 0;
    margin-bottom: var(--space-lg);
}

@media (min-width: 900px) {
    .demo-grid {
        grid-template-columns: 1fr 1.2fr;
    }
}

/* --------------------------------------------------------------------------
   Use Cases Grid
   -------------------------------------------------------------------------- */
.usecases-grid {
    display: grid;
    gap: var(--space-lg);
}

.usecase {
    transition: transform var(--transition-fast);
}

.usecase:hover {
    transform: translateY(-2px);
}

.usecase-media {
    margin-bottom: var(--space-sm);
    overflow: hidden;
    border-radius: 4px;
}

.usecase-image {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    transition: transform var(--transition-base);
}

.usecase:hover .usecase-image {
    transform: scale(1.03);
}

.usecase-title {
    font-size: 1.0625rem;
    margin-bottom: var(--space-xs);
}

.usecase p {
    font-size: 0.9375rem;
    color: var(--text-dim);
}

@media (min-width: 600px) {
    .usecases-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-lg) var(--space-xl);
    }
}

@media (min-width: 900px) {
    .usecases-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* --------------------------------------------------------------------------
   Pricing
   -------------------------------------------------------------------------- */
.pricing-content {
    max-width: 960px;
    margin: 0 auto;
}

.pricing-grid {
    display: grid;
    gap: var(--space-lg);
}

.pricing-plan {
    padding: var(--space-lg);
    background-color: var(--glass);
    border: 1px solid var(--stroke);
    border-radius: 4px;
}

.pricing-plan--featured {
    border-color: var(--accent);
    background-color: var(--accent-dim);
}

.pricing-label {
    display: inline-block;
    font-size: 1.1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent);
    margin-bottom: var(--space-xs);
}

.pricing-plan:not(.pricing-plan--featured) .pricing-label {
    color: var(--text-dim);
}

.pricing-value {
    font-size: 2rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
}

.pricing-period {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-dim);
}

.pricing-features {
    list-style: none;
    margin-bottom: var(--space-md);
}

.pricing-desc {
    margin: 0 0 var(--space-sm);
    font-size: 0.9rem;
    color: var(--text-dim);
    line-height: 1.5;
}

.pricing-highlight {
    margin: var(--space-sm) 0 var(--space-md);
    padding: 0.6rem 0.75rem;
    background-color: var(--accent-dim);
    border-left: 3px solid var(--accent);
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text);
}

.pricing-features li {
    position: relative;
    padding-left: 1.25rem;
    margin-bottom: var(--space-xs);
    color: var(--text-dim);
    font-size: 0.9375rem;
}

.pricing-features li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.5em;
    width: 6px;
    height: 6px;
    background-color: var(--accent);
    border-radius: 50%;
}

.pricing-note {
    margin: 0;
    color: var(--text-dim);
    font-size: 0.9rem;
}

.pricing-enterprise {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--stroke);
    text-align: center;
}

.pricing-enterprise p {
    color: var(--text-dim);
    margin-bottom: var(--space-sm);
}

.pricing-events {
    margin-top: var(--space-lg);
    text-align: left;
}

.pricing-events .pricing-label {
    margin: 0 0 var(--space-xs);
}

.pricing-events .btn {
    margin-top: var(--space-sm);
}

.pricing-footnotes {
    text-align: left;
    font-size: 0.9rem;
}

.pricing-footnotes h3 {
    margin: 0 0 var(--space-xs);
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-dim);
}

.pricing-footnotes h3 + p {
    margin-top: 0;
}

.pricing-footnotes p {
    margin-bottom: var(--space-sm);
}

@media (min-width: 768px) {
    .pricing-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* --------------------------------------------------------------------------
   FAQ
   -------------------------------------------------------------------------- */
.faq-list {
    max-width: 720px;
    border-top: 1px solid var(--stroke);
    margin: 0 auto;
}

#faq .section-title {
    text-align: center;
}

.faq-item {
    border-bottom: 1px solid var(--stroke);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: var(--space-md) 0;
    text-align: left;
    font-size: 1rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.faq-question:hover {
    color: var(--accent);
}

.faq-icon {
    position: relative;
    width: 12px;
    height: 12px;
    flex-shrink: 0;
    margin-left: var(--space-md);
}

.faq-icon::before,
.faq-icon::after {
    content: "";
    position: absolute;
    background-color: currentColor;
    transition: transform var(--transition-base);
}

.faq-icon::before {
    top: 50%;
    left: 0;
    width: 100%;
    height: 1px;
    transform: translateY(-50%);
}

.faq-icon::after {
    top: 0;
    left: 50%;
    width: 1px;
    height: 100%;
    transform: translateX(-50%);
}

.faq-question[aria-expanded="true"] .faq-icon::after {
    transform: translateX(-50%) rotate(90deg);
}

.faq-answer {
    padding-bottom: var(--space-md);
}

.faq-answer p {
    color: var(--text-dim);
    max-width: 600px;
}

/* --------------------------------------------------------------------------
   Final CTA
   -------------------------------------------------------------------------- */
.section-cta {
    text-align: center;
    padding: var(--space-2xl) 0;
    background: linear-gradient(180deg, var(--bg-1) 0%, var(--bg-2) 100%);
}

.cta-title {
    font-size: clamp(1.5rem, 4vw, 2rem);
    letter-spacing: -0.02em;
    max-width: 560px;
    margin: 0 auto var(--space-lg);
}

.cta-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: var(--space-sm) var(--space-md);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    padding: var(--space-lg) 0;
    background-color: var(--bg-0);
    border-top: 1px solid var(--stroke);
}

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

.footer-copy {
    font-size: 0.875rem;
    color: var(--text-faint);
}

.footer-links {
    display: flex;
    gap: var(--space-md);
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--text-dim);
    transition: color var(--transition-fast);
}

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

@media (min-width: 600px) {
    .footer-inner {
        flex-direction: row;
        justify-content: space-between;
    }
}

/* --------------------------------------------------------------------------
   Utilities & Animations
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}