/* =============================================================
   CaaSaaS Marketing Website - main.css
   Version: 1.0.0
   Theme: Dark, professional, tech-forward
   ============================================================= */

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

:root {
    --color-bg: #0a0a0f;
    --color-bg-elevated: #12121a;
    --color-bg-card: #1a1a26;
    --color-surface: #22222e;
    --color-border: #2a2a3a;
    --color-text: #e4e4ec;
    --color-text-muted: #8888a0;
    --color-accent: #6366f1;
    --color-accent-glow: rgba(99, 102, 241, 0.3);
    --color-success: #22c55e;
    --color-warning: #eab308;
    --color-intent: #a78bfa;
    --font-display: 'DM Sans', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --radius: 8px;
    --radius-lg: 16px;
    --max-width: 1200px;
}

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=JetBrains+Mono:wght@400;500&display=swap');

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-display);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: opacity 0.2s;
}
a:hover {
    opacity: 0.85;
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}
.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-brand {
    text-decoration: none;
}
.nav-logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.03em;
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}
.nav-links a {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
}
.nav-links a:hover {
    color: var(--color-text);
    opacity: 1;
}
.nav-cta {
    background: var(--color-accent);
    color: white !important;
    padding: 0.5rem 1.2rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.85rem;
}
.nav-cta:hover {
    opacity: 0.9 !important;
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    border: none;
}
.btn-primary {
    background: var(--color-accent);
    color: white;
}
.btn-primary:hover {
    opacity: 0.9;
    box-shadow: 0 0 30px var(--color-accent-glow);
}
.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}
.btn-secondary:hover {
    border-color: var(--color-text-muted);
}
.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

/* --- Hero Section --- */
.hero {
    padding: 10rem 2rem 6rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
    opacity: 0.15;
    pointer-events: none;
}
.hero-inner {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}
.hero-badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-accent);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 2rem;
}
.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
}
.hero-accent {
    background: linear-gradient(135deg, var(--color-accent), #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-sub {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
}
.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* --- Live Demo Section --- */
.demo-section {
    padding: 6rem 2rem;
    background: var(--color-bg-elevated);
}
.demo-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}
.demo-header {
    text-align: center;
    margin-bottom: 3rem;
}
.demo-header h2 {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
}
.demo-header p {
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
}
.demo-badge-live {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.9rem;
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-success);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 1.5rem;
}
.demo-pulse {
    width: 8px;
    height: 8px;
    background: var(--color-success);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* --- Demo Workspace (fake terminal/app window) --- */
.demo-workspace {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.5);
    max-width: 900px;
    margin: 0 auto;
}
.demo-workspace-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 1rem 1.25rem;
    background: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
}
.demo-workspace-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.demo-workspace-dot--red { background: #ff5f57; }
.demo-workspace-dot--yellow { background: #ffbd2e; }
.demo-workspace-dot--green { background: #28c840; }
.demo-workspace-title {
    margin-left: 0.75rem;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-weight: 500;
}
.demo-workspace-body {
    padding: 1.5rem;
    min-height: 400px;
}

/* --- Demo Command Bar --- */
.demo-command-bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
}
.demo-command-prompt {
    color: var(--color-accent);
    font-weight: 600;
}
.demo-command-text {
    color: var(--color-text-muted);
}
.demo-command-cursor {
    width: 2px;
    height: 1.1em;
    background: var(--color-accent);
    animation: blink 1s step-end infinite;
}
@keyframes blink {
    50% { opacity: 0; }
}

/* --- Demo Cards (SSE-injected) --- */
.demo-feed {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-height: 320px;
    overflow-y: auto;
}
.demo-card {
    padding: 1rem 1.25rem;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    animation: cardIn 0.4s ease-out;
}
@keyframes cardIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.demo-card p {
    font-size: 0.9rem;
    margin-top: 0.5rem;
}
.demo-card--generating {
    border-left: 3px solid var(--color-accent);
}
.demo-card--complete {
    border-left: 3px solid var(--color-success);
}
.demo-card--intent {
    border-left: 3px solid var(--color-intent);
}
.demo-card--waiting {
    border-left: 3px solid var(--color-border);
    opacity: 0.5;
}
.demo-badge {
    display: inline-block;
    padding: 0.15rem 0.6rem;
    background: rgba(99, 102, 241, 0.15);
    color: var(--color-accent);
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.demo-badge--success {
    background: rgba(34, 197, 94, 0.15);
    color: var(--color-success);
}
.demo-badge--intent {
    background: rgba(167, 139, 250, 0.15);
    color: var(--color-intent);
}
.demo-meta {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 0.4rem;
}
.demo-progress {
    margin-top: 0.75rem;
    height: 4px;
    background: var(--color-surface);
    border-radius: 2px;
    overflow: hidden;
}
.demo-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent), #a78bfa);
    border-radius: 2px;
    animation: progressPulse 2s ease-in-out infinite;
}
@keyframes progressPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}
.demo-reset {
    text-align: center;
    padding: 2rem;
    color: var(--color-text-muted);
    font-size: 0.85rem;
    font-style: italic;
}

/* --- Technology Grid --- */
.tech-section {
    padding: 6rem 2rem;
}
.tech-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    text-align: center;
}
.tech-inner h2 {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}
.tech-sub {
    color: var(--color-text-muted);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    text-align: left;
}
.tech-card {
    padding: 2rem;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: border-color 0.3s, box-shadow 0.3s;
}
.tech-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 0 40px rgba(99, 102, 241, 0.08);
}
.tech-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}
.tech-card p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.65;
}

/* --- CTA Section --- */
.cta-section {
    padding: 6rem 2rem;
    text-align: center;
    background: var(--color-bg-elevated);
    border-top: 1px solid var(--color-border);
}
.cta-inner {
    max-width: 600px;
    margin: 0 auto;
}
.cta-inner h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}
.cta-inner p {
    color: var(--color-text-muted);
    margin-bottom: 2rem;
}

/* --- Placeholder Pages --- */
.page-hero {
    padding: 10rem 2rem 3rem;
    text-align: center;
}
.page-hero h1 {
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}
.page-hero p {
    color: var(--color-text-muted);
    margin-top: 1rem;
    font-size: 1.1rem;
}
.page-body {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem;
    text-align: center;
    min-height: 30vh;
}

/* --- Footer --- */
.footer {
    padding: 4rem 2rem 2rem;
    border-top: 1px solid var(--color-border);
}
.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}
.footer-brand {
    margin-bottom: 2rem;
}
.footer-brand p {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    margin-top: 0.5rem;
}
.footer-links {
    display: flex;
    gap: 4rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}
.footer-col {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}
.footer-col h4 {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-muted);
    margin-bottom: 0.25rem;
}
.footer-col a {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}
.footer-col a:hover {
    color: var(--color-text);
}
.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}
.footer-bottom p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .nav-links {
        gap: 1rem;
    }
    .hero {
        padding: 8rem 1.5rem 4rem;
    }
    .hero-title {
        font-size: 2.2rem;
    }
    .tech-grid {
        grid-template-columns: 1fr;
    }
    .footer-links {
        gap: 2rem;
    }
    .demo-workspace-body {
        padding: 1rem;
    }
}