/* ===================================
   Klip Landing Page - Design System
   =================================== */

:root {
    /* Colors */
    --bg-primary: #0a0a0b;
    --bg-secondary: #111113;
    --bg-tertiary: #18181b;
    --bg-card: rgba(24, 24, 27, 0.6);
    --bg-glass: rgba(255, 255, 255, 0.03);

    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;

    --accent-start: #818cf8;
    --accent-end: #c084fc;
    --accent-glow: rgba(129, 140, 248, 0.3);

    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-glass: rgba(255, 255, 255, 0.1);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    --font-size-6xl: 4.5rem;

    /* Borders */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

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

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

/* ===================================
   Utilities
   =================================== */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glass-card {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
}

.section {
    padding: var(--space-4xl) 0;
    position: relative;
}

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

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-md);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
    color: white;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow);
}

.btn-secondary {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-large {
    padding: var(--space-lg) var(--space-2xl);
    font-size: var(--font-size-lg);
}

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

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--space-md) 0;
    background: rgba(10, 10, 11, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.nav-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-links a {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.nav-github {
    display: flex;
    align-items: center;
    padding: var(--space-sm);
    border-radius: var(--radius-full);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
}

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

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 600px;
    background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
    pointer-events: none;
    opacity: 0.5;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-2xl);
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    margin-bottom: var(--space-4xl);
}

.hero-visual {
    margin-top: var(--space-3xl);
}

/* Flow Demo */
.flow-demo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
    padding: var(--space-xl);
}

.flow-step {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    min-width: 200px;
    text-align: center;
    transition: all var(--transition-base);
}

.flow-step:hover {
    transform: translateY(-4px);
    border-color: var(--accent-start);
    box-shadow: 0 8px 30px var(--accent-glow);
}

.flow-icon {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-sm);
}

.flow-label {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-bottom: var(--space-xs);
}

.flow-content {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-style: italic;
}

.flow-arrow {
    color: var(--accent-start);
    font-size: var(--font-size-2xl);
    font-weight: 700;
}

/* ===================================
   Pipeline Section
   =================================== */

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

.pipeline-step {
    flex: 1 1 0;
    min-width: 180px;
    max-width: 200px;
    padding: var(--space-xl) var(--space-lg);
    text-align: center;
    position: relative;
    transition: all var(--transition-base);
}

.pipeline-step:hover {
    transform: translateY(-4px);
}

.pipeline-number {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pipeline-icon {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-md);
}

.pipeline-step h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-sm);
}

.pipeline-step p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.pipeline-connector {
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-start), var(--accent-end));
    margin-top: 80px;
    flex-shrink: 0;
}

/* ===================================
   Context-Aware Section
   =================================== */

.context-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.context-content {
    text-align: left;
}

.context-content .section-title {
    text-align: left;
}

.context-content .section-subtitle {
    text-align: left;
    margin: 0 0 var(--space-2xl);
}

.feature-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-lg);
}

.context-demo {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.demo-step {
    display: flex;
    align-items: flex-start;
    gap: var(--space-lg);
}

.demo-number {
    width: 32px;
    height: 32px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
}

.demo-text strong {
    display: block;
    margin-bottom: var(--space-xs);
}

.demo-text span {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* Email Mockup */
.email-mockup {
    padding: 0;
    overflow: hidden;
}

.email-header {
    display: flex;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid var(--border-subtle);
}

.email-dot {
    width: 12px;
    height: 12px;
    border-radius: var(--radius-full);
}

.email-dot.red {
    background: #ff5f57;
}

.email-dot.yellow {
    background: #febc2e;
}

.email-dot.green {
    background: #28c840;
}

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

.email-from {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-bottom: var(--space-xs);
}

.email-subject {
    font-weight: 600;
    margin-bottom: var(--space-lg);
}

.email-body {
    font-size: var(--font-size-sm);
    line-height: 1.8;
}

.email-incoming {
    color: var(--text-secondary);
    padding: var(--space-md);
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.email-divider {
    height: 1px;
    background: var(--border-subtle);
    margin: var(--space-lg) 0;
}

.email-reply {
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

/* ===================================
   Modes Grid
   =================================== */

.modes-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.mode-card {
    padding: var(--space-xl);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
}

.mode-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-start);
}

.mode-card.featured {
    border-color: rgba(129, 140, 248, 0.3);
}

.mode-badge {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    font-size: var(--font-size-xs);
}

.mode-icon {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-md);
}

.mode-card h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-sm);
}

.mode-card p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* ===================================
   Hooks Section
   =================================== */

.hooks-card {
    padding: var(--space-3xl);
    text-align: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(129, 140, 248, 0.1), rgba(192, 132, 252, 0.05));
}

.hooks-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: rgba(129, 140, 248, 0.2);
    border: 1px solid var(--accent-start);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--accent-start);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-xl);
}

.hooks-content .section-title {
    margin-bottom: var(--space-md);
}

.hooks-content .section-subtitle {
    margin-bottom: var(--space-2xl);
}

.hooks-examples {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    flex-wrap: wrap;
}

.hook-example {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
}

/* ===================================
   Languages
   =================================== */

.languages-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-md);
}

.language-pill {
    padding: var(--space-sm) var(--space-lg);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

.language-pill:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
}

/* ===================================
   Steps
   =================================== */

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

.step-card {
    padding: var(--space-2xl);
    text-align: center;
    position: relative;
}

.step-number {
    position: absolute;
    top: var(--space-lg);
    left: var(--space-lg);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    font-weight: 600;
}

.step-key {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-lg);
}

.step-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-sm);
}

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

/* ===================================
   Testimonials
   =================================== */

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

.testimonial-card {
    padding: var(--space-xl);
}

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

.testimonial-content p {
    font-size: var(--font-size-lg);
    font-style: italic;
    color: var(--text-secondary);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.author-avatar {
    font-size: var(--font-size-2xl);
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-info strong {
    font-size: var(--font-size-base);
}

.author-info span {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

/* ===================================
   FAQ
   =================================== */

.faq-list {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.faq-item {
    overflow: hidden;
}

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

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

.faq-icon {
    transition: transform var(--transition-base);
    flex-shrink: 0;
    color: var(--text-muted);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: all var(--transition-base);
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding: 0 var(--space-lg) var(--space-lg);
    color: var(--text-secondary);
}

.faq-answer a {
    color: var(--accent-start);
    text-decoration: underline;
}

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

.cta-card {
    padding: var(--space-4xl);
    text-align: center;
    background: linear-gradient(135deg, rgba(129, 140, 248, 0.1), rgba(192, 132, 252, 0.05));
}

.cta-icon {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-xl);
    margin: 0 auto var(--space-xl);
    box-shadow: 0 8px 40px var(--accent-glow);
}

.cta-card .section-title {
    margin-bottom: var(--space-md);
}

.cta-card .section-subtitle {
    margin-bottom: var(--space-2xl);
}

.cta-buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
}

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

.footer {
    padding: var(--space-3xl) 0;
    border-top: 1px solid var(--border-subtle);
}

.footer-content {
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.footer-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
}

.footer-tagline {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
}

.footer-links a {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

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

/* ===================================
   Animations
   =================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 0.5;
    }

    50% {
        opacity: 0.8;
    }
}

.hero-glow {
    animation: pulse 4s ease-in-out infinite;
}

/* Reveal animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

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

@media (max-width: 1024px) {
    .pipeline {
        flex-wrap: wrap;
    }

    .pipeline-connector {
        display: none;
    }

    .pipeline-step {
        flex: 0 0 calc(33.333% - var(--space-md));
    }

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

    .context-grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

    .context-visual {
        order: -1;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-6xl: 3rem;
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
    }

    .nav-links a:not(.nav-github) {
        display: none;
    }

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

    .flow-demo {
        flex-direction: column;
    }

    .flow-arrow {
        transform: rotate(90deg);
    }

    .pipeline-step {
        flex: 1 1 100%;
        max-width: 100%;
    }

    .steps-container {
        grid-template-columns: 1fr;
    }

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

    .hooks-examples {
        flex-direction: column;
        align-items: center;
    }

    .cta-buttons {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }

    .hero-title {
        font-size: 2.5rem;
    }

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

    .section {
        padding: var(--space-3xl) 0;
    }
}

/* ===================================
   More Projects
   =================================== */

.more-projects {
    padding-bottom: var(--space-3xl);
}

.section-eyebrow {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-sm);
}

.project-card {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    padding: var(--space-xl) var(--space-2xl);
    text-decoration: none;
    transition: all var(--transition-base);
    cursor: pointer;
    max-width: 700px;
    margin: 0 auto;
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-start);
    box-shadow: 0 8px 40px var(--accent-glow);
}

.project-icon {
    font-size: 3rem;
    flex-shrink: 0;
}

.project-info {
    flex: 1;
}

.project-info h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.project-info p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

.project-arrow {
    color: var(--text-muted);
    transition: all var(--transition-base);
    flex-shrink: 0;
}

.project-card:hover .project-arrow {
    color: var(--accent-start);
    transform: translateX(4px);
}

@media (max-width: 640px) {
    .project-card {
        flex-direction: column;
        text-align: center;
        padding: var(--space-xl);
    }

    .project-arrow {
        transform: rotate(90deg);
    }

    .project-card:hover .project-arrow {
        transform: rotate(90deg) translateX(4px);
    }
}