/* 
   KAMI OS DESIGN SYSTEM v4 — ENTERPRISE SAAS EDITION
   Inspired by Linear, Vercel, Stripe, and Apple.
   Theme: Deep Navy & Amber Gold
*/

:root {
    /* Colors */
    --bg-base: #030712; /* Deepest Navy / Black */
    --bg-surface: #0f172a; /* Elevated Navy */
    --bg-surface-glass: rgba(15, 23, 42, 0.4);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-tertiary: #475569;
    
    --accent-main: #f59e0b; /* Amber */
    --accent-light: #fcd34d;
    --accent-glow: rgba(245, 158, 11, 0.15);
    --accent-gradient: linear-gradient(135deg, #fcd34d 0%, #f59e0b 100%);
    
    --border-dim: rgba(255, 255, 255, 0.08);
    --border-bright: rgba(255, 255, 255, 0.2);
    --border-accent: rgba(245, 158, 11, 0.3);
    
    /* Spacing & Layout */
    --container-max: 1280px;
    --section-gap: 160px;
    
    /* Radii & Shadows */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    
    --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px var(--accent-glow);
    --shadow-inner: inset 0 1px 1px rgba(255, 255, 255, 0.1);
}

/* --------------------------------------------------------------------------
   GLOBAL RESETS & TYPOGRAPHY
-------------------------------------------------------------------------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Inter", sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    line-height: 1.6;
}

/* --------------------------------------------------------------------------
   AMBIENT BACKGROUND EFFECTS (Linear/Raycast style)
-------------------------------------------------------------------------- */
.ambient-background {
    position: fixed; inset: 0; z-index: -1; pointer-events: none;
    background: radial-gradient(circle at 50% 0%, rgba(15, 23, 42, 1) 0%, var(--bg-base) 70%);
}
.glow-orb {
    position: absolute; border-radius: 50%; filter: blur(120px); opacity: 0.4;
    animation: float 20s infinite ease-in-out alternate;
}
.glow-orb.top { top: -10%; left: 20%; width: 60vw; height: 60vh; background: rgba(245, 158, 11, 0.08); }
.glow-orb.bottom { bottom: -20%; right: -10%; width: 50vw; height: 50vh; background: rgba(56, 189, 248, 0.05); }

@keyframes float {
    0% { transform: translateY(0) scale(1); }
    100% { transform: translateY(50px) scale(1.1); }
}

/* --------------------------------------------------------------------------
   NAVIGATION (Glassmorphism)
-------------------------------------------------------------------------- */
nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    padding: 20px 0; border-bottom: 1px solid transparent;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
nav.scrolled {
    background: rgba(3, 7, 18, 0.7); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-dim); padding: 16px 0;
}
.nav-container {
    max-width: var(--container-max); margin: 0 auto; padding: 0 40px;
    display: flex; justify-content: space-between; align-items: center;
}
.brand {
    display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px;
    letter-spacing: -0.03em; color: var(--text-primary); text-decoration: none;
}
.brand i { color: var(--accent-main); font-size: 28px; }

.nav-links { display: flex; gap: 32px; }
.nav-links a {
    color: var(--text-secondary); text-decoration: none; font-size: 14px; font-weight: 500;
    transition: color 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); }

/* --------------------------------------------------------------------------
   BUTTONS
-------------------------------------------------------------------------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 24px; border-radius: 100px; font-size: 14px; font-weight: 600;
    text-decoration: none; transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    cursor: pointer; border: 1px solid transparent; outline: none;
}
.btn-primary {
    background: var(--text-primary); color: var(--bg-base);
    box-shadow: 0 4px 14px rgba(255,255,255,0.1);
}
.btn-primary:hover {
    background: #e2e8f0; transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255,255,255,0.15);
}
.btn-accent {
    background: var(--accent-gradient); color: #000;
    box-shadow: var(--shadow-glow), var(--shadow-inner);
}
.btn-accent:hover {
    transform: translateY(-2px); box-shadow: 0 0 60px rgba(245, 158, 11, 0.3), var(--shadow-inner);
}
.btn-glass {
    background: rgba(255,255,255,0.03); color: var(--text-primary);
    border: 1px solid var(--border-dim); backdrop-filter: blur(10px);
}
.btn-glass:hover {
    background: rgba(255,255,255,0.08); border-color: var(--border-bright); transform: translateY(-2px);
}

.btn-lg { padding: 16px 32px; font-size: 16px; }

/* --------------------------------------------------------------------------
   HERO SECTION
-------------------------------------------------------------------------- */
.hero {
    min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center;
    padding: 160px 40px 80px; text-align: center; position: relative;
}
.hero-badge {
    display: inline-flex; align-items: center; gap: 8px; padding: 6px 16px; border-radius: 100px;
    background: rgba(245, 158, 11, 0.1); border: 1px solid var(--border-accent);
    color: var(--accent-light); font-size: 13px; font-weight: 600; margin-bottom: 32px;
}
.hero h1 {
    font-size: clamp(48px, 6vw, 88px); font-weight: 800; letter-spacing: -0.04em;
    line-height: 1.05; max-width: 900px; margin: 0 auto 32px;
    background: linear-gradient(180deg, #ffffff 0%, rgba(255,255,255,0.6) 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero p {
    font-size: clamp(18px, 2vw, 22px); color: var(--text-secondary); max-width: 640px;
    margin: 0 auto 48px; line-height: 1.6; font-weight: 400;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; }

/* Custom CSS Dashboard Mockup */
.mockup-container {
    margin-top: 80px; width: 100%; max-width: 1100px; position: relative;
    perspective: 2000px;
}
.mockup-window {
    background: rgba(15, 23, 42, 0.6); border: 1px solid var(--border-bright);
    border-radius: var(--radius-lg); box-shadow: 0 40px 100px rgba(0,0,0,0.8), 0 0 0 1px rgba(255,255,255,0.05);
    backdrop-filter: blur(24px); overflow: hidden; transform: rotateX(8deg) translateY(0);
    transition: transform 0.5s ease;
}
.mockup-window:hover { transform: rotateX(0deg) translateY(-10px); }
.mockup-header {
    height: 48px; border-bottom: 1px solid var(--border-dim); display: flex; align-items: center; padding: 0 20px; gap: 8px;
}
.mockup-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--border-bright); }
.mockup-body { padding: 40px; display: grid; grid-template-columns: 250px 1fr; gap: 32px; text-align: left; }
.mockup-sidebar { display: flex; flex-direction: column; gap: 16px; }
.mockup-nav-item { height: 32px; border-radius: 6px; background: rgba(255,255,255,0.03); width: 100%; }
.mockup-nav-item.active { background: var(--accent-glow); border-left: 2px solid var(--accent-main); }
.mockup-content { display: flex; flex-direction: column; gap: 24px; }
.mockup-card { background: rgba(255,255,255,0.02); border: 1px solid var(--border-dim); border-radius: 12px; padding: 24px; }
.mockup-chart { display: flex; align-items: flex-end; gap: 8px; height: 120px; margin-top: 24px; }
.mockup-bar { flex: 1; background: var(--border-dim); border-radius: 4px 4px 0 0; }
.mockup-bar.accent { background: var(--accent-gradient); box-shadow: 0 0 20px var(--accent-glow); }

/* --------------------------------------------------------------------------
   LOGO CLOUD
-------------------------------------------------------------------------- */
.logo-cloud { padding: 80px 40px; border-top: 1px solid var(--border-dim); border-bottom: 1px solid var(--border-dim); background: rgba(15, 23, 42, 0.2); }
.logo-cloud p { text-align: center; color: var(--text-tertiary); font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 32px; }
.logos { display: flex; justify-content: center; gap: clamp(40px, 8vw, 100px); flex-wrap: wrap; opacity: 0.5; }
.logos i { font-size: 40px; color: var(--text-secondary); transition: color 0.3s; }
.logos i:hover { color: var(--text-primary); }

/* --------------------------------------------------------------------------
   GENERAL SECTIONS
-------------------------------------------------------------------------- */
section { padding: var(--section-gap) 40px; max-width: var(--container-max); margin: 0 auto; width: 100%; }
.section-header { margin-bottom: 80px; max-width: 640px; }
.section-header h2 { font-size: clamp(32px, 4vw, 48px); font-weight: 800; letter-spacing: -0.03em; margin-bottom: 24px; line-height: 1.1; }
.section-header p { font-size: 20px; color: var(--text-secondary); }

/* --------------------------------------------------------------------------
   BENTO GRID (Features)
-------------------------------------------------------------------------- */
.bento-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.bento-card {
    background: var(--bg-surface-glass); border: 1px solid var(--border-dim);
    border-radius: var(--radius-lg); padding: 40px; backdrop-filter: blur(10px);
    transition: all 0.4s ease; display: flex; flex-direction: column; position: relative; overflow: hidden;
}
/* Premium glow on hover */
.bento-card::before {
    content: ''; position: absolute; inset: 0; background: radial-gradient(800px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255,255,255,0.06), transparent 40%); opacity: 0; transition: opacity 0.3s; z-index: 0; pointer-events: none;
}
.bento-card:hover { border-color: var(--border-bright); transform: translateY(-4px); box-shadow: var(--shadow-glass); }
.bento-card:hover::before { opacity: 1; }

.bento-card > * { position: relative; z-index: 1; }
.bento-icon { width: 48px; height: 48px; border-radius: 12px; background: rgba(255,255,255,0.05); border: 1px solid var(--border-dim); display: flex; align-items: center; justify-content: center; font-size: 24px; margin-bottom: 24px; color: var(--text-primary); }
.bento-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.bento-card p { color: var(--text-secondary); font-size: 15px; line-height: 1.6; }
.bento-span-2 { grid-column: span 2; }

/* --------------------------------------------------------------------------
   IMAGE/TEXT SPLIT LAYOUTS (Features detail)
-------------------------------------------------------------------------- */
.split-section { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.split-section.reverse { direction: rtl; }
.split-section.reverse > * { direction: ltr; }
.split-content h3 { font-size: 40px; font-weight: 800; letter-spacing: -0.03em; margin-bottom: 24px; }
.split-content p { font-size: 18px; color: var(--text-secondary); margin-bottom: 32px; }
.split-list { list-style: none; display: flex; flex-direction: column; gap: 16px; }
.split-list li { display: flex; align-items: center; gap: 12px; font-size: 16px; font-weight: 500; }
.split-list i { color: var(--accent-main); font-size: 20px; }

/* --------------------------------------------------------------------------
   METRICS & TESTIMONIALS
-------------------------------------------------------------------------- */
.metrics-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; border-top: 1px solid var(--border-dim); padding-top: 80px; }
.metric-item h4 { font-size: 48px; font-weight: 800; color: var(--text-primary); letter-spacing: -0.04em; margin-bottom: 8px; }
.metric-item p { color: var(--text-secondary); font-size: 15px; }

.testimonial { background: var(--bg-surface-glass); border: 1px solid var(--border-dim); border-radius: var(--radius-lg); padding: 64px; text-align: center; }
.testimonial i { font-size: 40px; color: var(--accent-main); opacity: 0.5; margin-bottom: 24px; }
.testimonial h3 { font-size: 28px; font-weight: 500; line-height: 1.4; margin-bottom: 32px; font-style: italic; }
.testimonial-author { font-size: 16px; font-weight: 700; color: var(--text-primary); }
.testimonial-role { font-size: 14px; color: var(--text-secondary); }

/* --------------------------------------------------------------------------
   CTA SECTION
-------------------------------------------------------------------------- */
.cta-box {
    background: radial-gradient(120% 120% at 50% 100%, rgba(245, 158, 11, 0.1) 0%, rgba(15, 23, 42, 0.5) 100%), var(--bg-surface);
    border: 1px solid var(--border-dim); border-radius: var(--radius-xl);
    padding: 100px 40px; text-align: center; position: relative; overflow: hidden;
}
.cta-box h2 { font-size: 48px; font-weight: 800; letter-spacing: -0.03em; margin-bottom: 24px; }
.cta-box p { font-size: 20px; color: var(--text-secondary); max-width: 600px; margin: 0 auto 48px; }

/* --------------------------------------------------------------------------
   FOOTER
-------------------------------------------------------------------------- */
footer { border-top: 1px solid var(--border-dim); padding: 80px 40px 40px; background: var(--bg-base); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1fr; gap: 64px; max-width: var(--container-max); margin: 0 auto 80px; }
.footer-brand .brand { margin-bottom: 24px; }
.footer-brand p { color: var(--text-secondary); font-size: 14px; max-width: 300px; }
.footer-col h4 { font-size: 14px; font-weight: 600; margin-bottom: 24px; color: var(--text-primary); }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.footer-links a { color: var(--text-secondary); text-decoration: none; font-size: 14px; transition: color 0.2s; }
.footer-links a:hover { color: var(--text-primary); }
.footer-bottom { border-top: 1px solid var(--border-dim); padding-top: 32px; display: flex; justify-content: space-between; align-items: center; max-width: var(--container-max); margin: 0 auto; color: var(--text-tertiary); font-size: 14px; }

/* --------------------------------------------------------------------------
   FORMS & FAQ (Contact / Features)
-------------------------------------------------------------------------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; }
.form-container { background: var(--bg-surface-glass); border: 1px solid var(--border-dim); border-radius: var(--radius-lg); padding: 48px; backdrop-filter: blur(10px); }
.input-group { margin-bottom: 24px; }
.input-group label { display: block; font-size: 13px; font-weight: 600; color: var(--text-secondary); margin-bottom: 8px; }
.input-group input, .input-group textarea {
    width: 100%; background: rgba(0,0,0,0.2); border: 1px solid var(--border-dim); border-radius: 8px;
    padding: 16px; color: var(--text-primary); font-size: 15px; outline: none; transition: all 0.3s;
    font-family: inherit;
}
.input-group input:focus, .input-group textarea:focus { border-color: var(--accent-main); box-shadow: 0 0 0 1px var(--accent-main); background: rgba(0,0,0,0.4); }

.faq-item { border-bottom: 1px solid var(--border-dim); padding: 24px 0; }
.faq-item summary { font-size: 18px; font-weight: 600; cursor: pointer; list-style: none; display: flex; justify-content: space-between; outline: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; color: var(--accent-main); font-size: 24px; font-weight: 400; transition: transform 0.3s; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { margin-top: 16px; color: var(--text-secondary); font-size: 15px; line-height: 1.6; }

/* --------------------------------------------------------------------------
   SCROLL REVEAL ANIMATIONS
-------------------------------------------------------------------------- */
.reveal { opacity: 0; transform: translateY(30px); transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1); }
.reveal.active { opacity: 1; transform: translateY(0); }
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

/* RESPONSIVE */
@media (max-width: 1024px) {
    .bento-grid { grid-template-columns: 1fr; }
    .bento-span-2 { grid-column: span 1; }
    .split-section, .contact-grid { grid-template-columns: 1fr; gap: 64px; }
    .metrics-grid { grid-template-columns: 1fr 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
    .footer-brand { grid-column: span 2; }
}
@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero { padding-top: 120px; }
    .mockup-body { grid-template-columns: 1fr; }
    .mockup-sidebar { display: none; }
    .metrics-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-brand { grid-column: span 1; }
    .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
}