/* SOND RU — Premium Dark Design (2026) */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    /* Base Colors */
    --bg-body: #050507;
    --bg-surface: #141416;
    --bg-surface-hover: #1D1D20;

    /* Text Colors */
    --text-primary: #FFFFFF;
    --text-secondary: #94969A;
    --text-tertiary: #5F6166;

    /* Accents */
    --accent-primary: #6E56CF;
    /* Purple-ish */
    --accent-gradient: linear-gradient(135deg, #FF6B6B 0%, #6E56CF 100%);
    --accent-glow: rgba(110, 86, 207, 0.4);

    /* Status Colors */
    --status-red-bg: rgba(255, 69, 58, 0.15);
    --status-red-text: #FF453A;
    --status-yellow-bg: rgba(255, 214, 10, 0.15);
    --status-yellow-text: #FFD60A;
    --status-green-bg: rgba(48, 209, 88, 0.15);
    --status-green-text: #30D158;

    /* Layout */
    --max-width: 1040px;
    --header-height: 70px;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;

    /* Spacing */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 32px;
    --space-lg: 64px;
    --space-xl: 120px;
}

/* === Reset & Base === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-body);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: 0.2s ease;
}

ul {
    list-style: none;
}

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

/* === Typography === */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

h1 {
    font-size: 48px;
}

h2 {
    font-size: 40px;
}

h3 {
    font-size: 32px;
}

@media (min-width: 768px) {
    h1 {
        font-size: 64px;
    }

    h2 {
        font-size: 52px;
    }

    h3 {
        font-size: 40px;
    }
}

p.lead {
    font-size: 20px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* === Components === */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-weight: 600;
    font-size: 16px;
    border-radius: var(--radius-full);
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background: #FFFFFF;
    color: #000000;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.btn-cta-gradient {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 10px 30px var(--accent-glow);
}

.btn-cta-gradient:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px var(--accent-glow);
}

.tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 12px;
}

.tag.red {
    background: var(--status-red-bg);
    color: var(--status-red-text);
}

.tag.yellow {
    background: var(--status-yellow-bg);
    color: var(--status-yellow-text);
}

.tag.green {
    background: var(--status-green-bg);
    color: var(--status-green-text);
}

/* === Header === */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: rgba(5, 5, 7, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

header .container {
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-weight: 700;
    font-size: 20px;
    letter-spacing: -0.03em;
}

.nav-links {
    display: none;
}

@media (min-width: 768px) {
    .nav-links {
        display: flex;
        gap: 32px;
    }

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

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

/* === Hero Section === */
.hero {
    padding-top: calc(var(--header-height) + 80px);
    padding-bottom: var(--space-xl);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.hero h1 {
    margin-bottom: 24px;
}

.hero-subtitle {
    margin-bottom: 40px;
    font-size: 20px;
    color: var(--text-secondary);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    flex-direction: column;
    gap: 16px;
    align-items: center;
}

.hero-note {
    margin-top: 12px;
    font-size: 13px;
    color: var(--text-tertiary);
}

/* Ambience / Glow */
.glow-spot {
    position: absolute;
    width: 600px;
    height: 600px;
    background: var(--accent-primary);
    filter: blur(150px);
    opacity: 0.15;
    border-radius: 50%;
    z-index: 0;
    pointer-events: none;
}

.glow-spot.top-center {
    top: -300px;
    left: 50%;
    transform: translateX(-50%);
}

/* === Conversation Types === */
.section-types {
    padding: var(--space-xl) 0;
}

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

.section-header h2 {
    margin-bottom: 16px;
}

.types-grid {
    display: grid;
    gap: 20px;
}

.type-card {
    background: var(--bg-surface);
    border: 1px solid rgba(255, 255, 255, 0.06);
    padding: 32px;
    border-radius: var(--radius-lg);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.type-card:hover {
    transform: translateY(-4px);
    border-color: rgba(110, 86, 207, 0.3);
}

.type-icon {
    font-size: 32px;
    margin-bottom: 16px;
}

.type-card h3 {
    font-size: 22px;
    margin-bottom: 12px;
}

.type-desc {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
}

.type-list {
    padding-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.type-list li {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    position: relative;
    padding-left: 16px;
}

.type-list li::before {
    content: "•";
    color: var(--accent-primary);
    position: absolute;
    left: 0;
}

@media (min-width: 768px) {
    .types-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* === Screenshots Gallery === */
.screenshots-section {
    padding: var(--space-lg) 0 var(--space-xl);
    overflow: hidden;
}

.screenshots-container {
    width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding: 20px 0;
}

.screenshots-container::-webkit-scrollbar {
    display: none;
}

.screenshots-track {
    display: flex;
    gap: 28px;
    padding: 0 var(--space-md);
    width: max-content;
}

.screenshot-item {
    flex-shrink: 0;
    text-align: center;
    transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.screenshot-item:hover {
    transform: translateY(-12px);
}

.screenshot-item img {
    width: 270px;
    height: auto;
    border-radius: 28px;
    box-shadow:
        0 8px 32px rgba(0, 0, 0, 0.5),
        0 0 60px rgba(110, 86, 207, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: box-shadow 0.4s ease;
}

.screenshot-item:hover img {
    box-shadow:
        0 16px 48px rgba(0, 0, 0, 0.6),
        0 0 80px rgba(110, 86, 207, 0.2);
}

.screenshot-item p {
    margin-top: 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.screenshot-item:hover p {
    color: var(--text-primary);
}

/* === Features Grid === */
.section-features {
    padding: var(--space-xl) 0;
}

.features-grid {
    display: grid;
    gap: 20px;
}

.feature-card {
    background: var(--bg-surface);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 28px;
    border-radius: var(--radius-md);
    transition: transform 0.2s ease, background 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-2px);
    background: var(--bg-surface-hover);
}

.feature-icon {
    font-size: 28px;
    margin-bottom: 16px;
}

.feature-card h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

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

@media (min-width: 600px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

/* === PROOF cards (used in testimonials) === */
.proof-card {
    background: var(--bg-surface);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 24px;
    border-radius: var(--radius-md);
    transition: transform 0.2s;
}

.proof-card:hover {
    transform: translateY(-4px);
    background: var(--bg-surface-hover);
}

.proof-quote {
    font-size: 18px;
    font-weight: 500;
    margin-bottom: 12px;
    color: var(--text-primary);
    font-style: italic;
}

.proof-context {
    font-size: 14px;
    color: var(--text-tertiary);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 12px;
}

/* === How It Works (legacy) === */
.section-steps {
    padding: var(--space-xl) 0;
}

.steps-list {
    display: grid;
    gap: 40px;
    margin-top: var(--space-lg);
}

.step-item {
    text-align: center;
}

.step-icon {
    width: 64px;
    height: 64px;
    background: var(--bg-surface);
    border-radius: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.step-item h3 {
    font-size: 20px;
    margin-bottom: 8px;
}

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

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

/* === Use Cases === */
.section-cases {
    padding: var(--space-xl) 0;
}

.cases-grid {
    display: grid;
    gap: 24px;
}

.case-card {
    background: var(--bg-surface);
    padding: 32px;
    border-radius: var(--radius-lg);
}

.case-quote {
    font-size: 18px;
    line-height: 1.6;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.case-role {
    color: var(--accent-primary);
    font-size: 12px;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.1em;
    margin-bottom: 16px;
    display: block;
}

.case-list {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.case-list li {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    position: relative;
    padding-left: 16px;
}

.case-list li::before {
    content: "•";
    color: var(--accent-primary);
    position: absolute;
    left: 0;
}

@media (min-width: 900px) {
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* === Pricing === */
.section-pricing {
    padding: var(--space-xl) 0;
}

.pricing-grid {
    display: grid;
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--bg-surface);
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    flex-direction: column;
}

.pricing-card.accent {
    border-color: var(--accent-primary);
    background: radial-gradient(circle at top right, rgba(110, 86, 207, 0.1), transparent 70%), var(--bg-surface);
}

.price {
    font-size: 32px;
    font-weight: 700;
    margin: 16px 0;
}

.price span {
    font-size: 16px;
    font-weight: 400;
    color: var(--text-secondary);
}

.pricing-features {
    margin: 24px 0;
    flex-grow: 1;
}

.pricing-features li {
    margin-bottom: 12px;
    font-size: 15px;
    color: var(--text-secondary);
}

/* === Final CTA === */
.section-cta {
    padding: var(--space-xl) 0;
    text-align: center;
}

/* === Footer === */
footer {
    padding: var(--space-lg) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
    color: var(--text-tertiary);
    font-size: 14px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 24px;
}

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

/* Utility */
.highlight {
    color: var(--text-primary);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate {
    animation: fadeIn 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

/* Mobile responsive utils */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }

    .hero {
        padding-top: 120px;
    }

    .btn-cta-gradient {
        width: 100%;
        max-width: 300px;
    }

    .screenshot-item img {
        width: 220px;
    }

    .screenshots-track {
        gap: 16px;
        padding: 0 16px;
    }

    .footer-links {
        flex-direction: column;
        gap: 12px;
    }
}

/* === Legal & Content Pages === */
.legal-content {
    padding-top: 140px;
    padding-bottom: 80px;
    max-width: 800px;
    margin: 0 auto;
}

.legal-content h1 {
    margin-bottom: 40px;
    text-align: center;
}

.legal-content section {
    margin-bottom: 48px;
}

.legal-content h2 {
    font-size: 28px;
    margin-bottom: 24px;
    color: var(--text-primary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 12px;
}

.legal-content h3 {
    font-size: 22px;
    margin-bottom: 16px;
    margin-top: 32px;
    color: var(--text-primary);
}

.legal-content h4 {
    font-size: 18px;
    margin-bottom: 12px;
    margin-top: 24px;
    color: var(--accent-primary);
}

.legal-content p,
.legal-content li {
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.legal-content ul,
.legal-content ol {
    padding-left: 24px;
    margin-bottom: 24px;
}

.legal-content li {
    margin-bottom: 8px;
}

.service-card {
    background: var(--bg-surface);
    padding: 24px;
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.note {
    background: rgba(255, 214, 10, 0.1);
    color: #FFD60A;
    padding: 16px;
    border-radius: var(--radius-sm);
    border-left: 4px solid #FFD60A;
}

.final-note {
    text-align: center;
    margin-top: 60px;
    padding: 40px;
    background: var(--bg-surface);
    border-radius: var(--radius-lg);
}