/* ═══════════════════════════════════════════════
   sova360 Design System — Crystal GAA M3 Palette
   Light-first · Professional · Institutional
   ═══════════════════════════════════════════════ */

:root {
  --indigo-50: #F0F3FA; --indigo-100: #E3E7F3; --indigo-200: #CDD3EA;
  --indigo-300: #A9B2D4; --indigo-400: #8490C2; --indigo-500: #6B74B5;
  --indigo-600: #5B6ABF; --indigo-700: #4C5AA8; --indigo-800: #3E4A8A;
  --indigo-900: #333D6E; --indigo-950: #1F2544;

  --slate-50: #F8FAFC; --slate-100: #F1F5F9; --slate-200: #E2E8F0;
  --slate-300: #CBD5E1; --slate-400: #94A3B8; --slate-500: #64748B;
  --slate-600: #475569; --slate-700: #334155; --slate-800: #1E293B;
  --slate-900: #0F172A; --slate-950: #020617;

  --emerald-100: #D1FAE5; --emerald-500: #10B981; --emerald-600: #059669;
  --red-500: #EF4444; --amber-500: #F59E0B; --amber-700: #B45309;
  --violet-300: #C4B5FD; --violet-500: #8B5CF6; --violet-600: #7C3AED;
  --blue-500: #3B82F6; --blue-600: #2563EB;

  --bg: var(--slate-50); --bg-card: #FFFFFF; --bg-elevated: var(--slate-100);
  --text: var(--slate-900); --text-secondary: var(--slate-500); --text-muted: var(--slate-400);
  --accent: var(--indigo-600); --accent-light: var(--indigo-50); --accent-glow: rgba(91,106,191,0.1);
  --border: var(--slate-200); --border-subtle: rgba(226,232,240,0.6);
  --success: var(--emerald-600);

  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --radius: 16px; --radius-sm: 8px; --radius-lg: 24px; --radius-full: 9999px;
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --max-w: 1200px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow: 0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.1);
}

/* ── Reset ── */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--indigo-700)}
img{max-width:100%;height:auto;display:block}
button{font-family:inherit;cursor:pointer}

/* ── Typography ── */
h1,h2,h3,h4{font-weight:800;line-height:1.2;color:var(--slate-900)}
h1{font-size:clamp(2.2rem,5vw,3.5rem);letter-spacing:-0.03em}
h2{font-size:clamp(1.6rem,3.5vw,2.5rem);letter-spacing:-0.02em}
h3{font-size:clamp(1.1rem,2vw,1.4rem)}
.label{font-size:0.7rem;font-weight:800;letter-spacing:0.15em;text-transform:uppercase;color:var(--accent)}

/* ── Layout ── */
.container{width:100%;max-width:var(--max-w);margin:0 auto;padding:0 24px}
section{padding:100px 0;position:relative}
.section-header{text-align:center;margin-bottom:56px}
.section-header h2{margin:12px 0 16px}
.section-header p{color:var(--text-secondary);max-width:600px;margin:0 auto;font-size:1.05rem}

/* ── Navigation ── */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:#f8fafc;border-bottom:1px solid var(--border-subtle);transition:box-shadow var(--transition)}
.nav.scrolled{box-shadow:0 1px 8px rgba(0,0,0,0.08)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:56px;max-width:1400px;margin:0 auto;padding:0 32px;gap:4px}
.nav-logo{display:flex;align-items:center;gap:8px;font-size:1.1rem;font-weight:900;color:var(--indigo-950);letter-spacing:0.03em;white-space:nowrap;flex-shrink:0}
.nav-logo svg{width:30px;height:30px}
.nav-links{display:flex;align-items:center;gap:2px;list-style:none;flex-shrink:1;min-width:0}
.nav-links li{flex-shrink:0}
.nav-links a{font-size:0.76rem;font-weight:600;color:var(--text-secondary);transition:all var(--transition);white-space:nowrap;padding:5px 7px;border-radius:6px;display:block}
.nav-links a:hover{color:var(--accent);background:var(--accent-glow)}
.lang-switcher{display:flex;gap:1px;background:var(--bg-elevated);border-radius:6px;padding:2px}
.lang-switcher a{padding:3px 7px!important;font-size:0.66rem!important;font-weight:700;color:var(--text-muted);border-radius:4px;transition:all var(--transition)}
.lang-switcher a.active,.lang-switcher a:hover{background:var(--accent);color:#fff}
.nav-login{padding:5px 12px;font-size:0.76rem;font-weight:600;color:var(--accent);border:1.5px solid var(--accent);border-radius:var(--radius-sm);background:transparent;transition:all var(--transition);white-space:nowrap;flex-shrink:0}
.nav-login:hover{background:var(--accent-light);transform:translateY(-1px)}
.nav-cta{display:inline-flex;align-items:center;gap:4px;padding:6px 14px;background:var(--accent);color:#fff!important;font-weight:700;font-size:0.76rem;border-radius:var(--radius-sm);border:none;transition:all var(--transition);white-space:nowrap;flex-shrink:0}
.nav-cta:hover{background:var(--indigo-700);transform:translateY(-1px);box-shadow:0 8px 25px rgba(91,106,191,0.3)}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;padding:4px}
.hamburger span{width:24px;height:2px;background:var(--slate-700);transition:all var(--transition)}

/* ── Hero ── */
.hero{min-height:100vh;display:flex;align-items:center;position:relative;overflow:hidden;padding-top:56px;background:linear-gradient(135deg,var(--slate-50) 0%,var(--indigo-50) 50%,var(--slate-50) 100%)}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-glow-1{position:absolute;top:-200px;right:-100px;width:600px;height:600px;background:radial-gradient(circle,rgba(91,106,191,0.12) 0%,transparent 70%);animation:float 20s ease-in-out infinite}
.hero-glow-2{position:absolute;bottom:-150px;left:-150px;width:500px;height:500px;background:radial-gradient(circle,rgba(124,58,237,0.08) 0%,transparent 70%);animation:float 25s ease-in-out infinite reverse}
@keyframes float{0%,100%{transform:translate(0,0)}50%{transform:translate(30px,-30px)}}
.hero-inner{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.hero-content{position:relative;z-index:1}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 16px;background:var(--accent-glow);border:1px solid rgba(91,106,191,0.2);border-radius:50px;font-size:0.75rem;font-weight:800;color:var(--accent);letter-spacing:0.05em;margin-bottom:24px}
.hero-badge .dot{width:6px;height:6px;background:var(--success);border-radius:50%;animation:pulse-dot 2s ease-in-out infinite}
@keyframes pulse-dot{0%,100%{opacity:1}50%{opacity:0.4}}
.hero-slogan{font-size:clamp(0.9rem,1.3vw,1rem);font-weight:700;letter-spacing:0.15em;color:var(--accent);margin-bottom:8px;text-transform:uppercase}
.hero h1{margin-bottom:20px;color:var(--indigo-950)}
.hero-desc{font-size:1.05rem;color:var(--text-secondary);margin-bottom:36px;max-width:520px;line-height:1.75}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-visual{position:relative;z-index:1;display:flex;justify-content:center}
.hero-illustration{width:100%;max-width:520px;border-radius:var(--radius-lg);box-shadow:var(--shadow-xl);border:1px solid var(--border)}

/* ── Buttons ── */
.btn-primary{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;background:var(--accent);color:#fff;font-weight:700;font-size:0.92rem;border-radius:var(--radius-sm);border:none;transition:all var(--transition)}
.btn-primary:hover{background:var(--indigo-700);transform:translateY(-2px);box-shadow:0 12px 30px rgba(91,106,191,0.3);color:#fff}
.btn-outline{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;background:transparent;color:var(--text);font-weight:700;font-size:0.92rem;border-radius:var(--radius-sm);border:1.5px solid var(--border);transition:all var(--transition)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-glow)}

/* ── Stats ── */
.stats{background:var(--indigo-950);padding:60px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;text-align:center}
.stat-number{font-size:2.5rem;font-weight:900;color:#fff;margin-bottom:4px}
.stat-label{font-size:0.85rem;font-weight:500;color:var(--slate-400)}

/* ── Feature Cards ── */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.feature-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:32px;transition:all var(--transition);position:relative;overflow:hidden}
.feature-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),var(--indigo-400));opacity:0;transition:opacity var(--transition)}
.feature-card:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:var(--shadow-lg)}
.feature-card:hover::before{opacity:1}
.feature-icon{width:52px;height:52px;display:flex;align-items:center;justify-content:center;background:var(--accent-light);border-radius:14px;font-size:1.5rem;margin-bottom:20px}
.feature-card h3{margin-bottom:8px}
.feature-card p{font-size:0.88rem;color:var(--text-secondary);line-height:1.65}

/* ── AI Section ── */
.ai-section{background:linear-gradient(135deg,var(--indigo-950) 0%,#2D1B69 50%,var(--indigo-950) 100%);color:#fff;overflow:hidden;position:relative}
.ai-section::before{content:'';position:absolute;inset:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Ccircle cx='30' cy='30' r='1'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E")}
.ai-section .section-header h2{color:#fff}
.ai-section .section-header p{color:var(--slate-300)}
.ai-section .label{color:var(--violet-300)}
.ai-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px;position:relative;z-index:1}
.ai-card{background:rgba(255,255,255,0.06);backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,0.1);border-radius:var(--radius);padding:32px;transition:all var(--transition)}
.ai-card:hover{transform:translateY(-4px);border-color:rgba(196,181,253,0.3);box-shadow:0 16px 40px rgba(0,0,0,0.3)}
.ai-card .feature-icon{background:rgba(124,58,237,0.2);border:1px solid rgba(196,181,253,0.2)}
.ai-card h3{color:#fff;margin-bottom:8px}
.ai-card p{color:var(--slate-300);font-size:0.88rem;line-height:1.65}
.ai-highlight{background:rgba(124,58,237,0.15);border:1px solid rgba(124,58,237,0.3);border-radius:var(--radius-sm);padding:16px 20px;margin-top:16px;font-size:0.82rem;color:var(--violet-300);line-height:1.6}

/* ── Domains ── */
.domains-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px}
.domain-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;text-align:center;transition:all var(--transition)}
.domain-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.domain-icon{font-size:2.2rem;margin-bottom:12px}
.domain-card h3{font-size:1rem;margin-bottom:6px}
.domain-card p{font-size:0.8rem;color:var(--text-secondary);line-height:1.55}

/* ── Security ── */
.pillars-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;max-width:960px;margin:0 auto}
.pillars-row-bottom{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;max-width:960px;margin:16px auto 0}
.pillar{text-align:center;padding:28px 16px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);transition:all var(--transition)}
.pillar:hover{transform:translateY(-3px);border-color:var(--accent);box-shadow:var(--shadow)}
.pillar-icon{font-size:2rem;margin-bottom:12px}
.pillar h4{font-size:0.85rem;font-weight:700;margin-bottom:6px}
.pillar p{font-size:0.75rem;color:var(--text-secondary);line-height:1.5}
.badges{display:flex;gap:12px;flex-wrap:wrap;justify-content:center;margin-top:40px}
.badge{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;background:var(--bg-card);border:1px solid var(--border);border-radius:50px;font-size:0.82rem;font-weight:700;color:var(--text)}
.badge .badge-dot{width:8px;height:8px;background:var(--success);border-radius:50%}

/* ── Interface Showcase ── */
.showcase-tabs{display:flex;gap:8px;margin-bottom:32px;justify-content:center;flex-wrap:wrap}
.showcase-tab{padding:10px 20px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);font-size:0.85rem;font-weight:600;color:var(--text-secondary);cursor:pointer;transition:all var(--transition)}
.showcase-tab.active,.showcase-tab:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.showcase-display{position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);box-shadow:var(--shadow-xl);background:var(--bg-card)}
.showcase-display .showcase-item{display:none;padding:40px}
.showcase-display .showcase-item.active{display:block}

/* ── Crystal App CTA ── */
.crystal-cta{background:linear-gradient(135deg,var(--slate-100) 0%,var(--indigo-50) 100%);border-radius:var(--radius-lg);padding:48px;display:flex;align-items:center;gap:40px;border:1px solid var(--border)}
.crystal-cta-content{flex:1}
.crystal-cta-content h3{margin-bottom:12px}
.crystal-cta-content p{color:var(--text-secondary);margin-bottom:20px;font-size:0.95rem}

/* ── FAQ ── */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;overflow:hidden;background:var(--bg-card);transition:border-color var(--transition)}
.faq-item.active{border-color:var(--accent)}
.faq-question{display:flex;justify-content:space-between;align-items:center;padding:20px 24px;cursor:pointer;gap:16px}
.faq-question h4{font-size:0.95rem;font-weight:600}
.faq-chevron{width:20px;height:20px;color:var(--text-muted);transition:transform var(--transition);flex-shrink:0}
.faq-item.active .faq-chevron{transform:rotate(180deg);color:var(--accent)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height 0.4s ease}
.faq-answer p{padding:0 24px 20px;font-size:0.9rem;color:var(--text-secondary);line-height:1.7}

/* ── Contact ── */
.cta-section{background:linear-gradient(135deg,var(--indigo-50) 0%,var(--slate-50) 100%)}
.contact-form{max-width:600px;margin:0 auto}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
.form-input{width:100%;padding:14px 18px;border:1.5px solid var(--border);border-radius:var(--radius-sm);font-size:0.9rem;font-family:var(--font);background:var(--bg-card);color:var(--text);transition:border-color var(--transition);margin-bottom:16px}
.form-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}
textarea.form-input{min-height:120px;resize:vertical}
.form-submit{width:100%;padding:16px;background:var(--accent);color:#fff;font-weight:700;font-size:0.95rem;border:none;border-radius:var(--radius-sm);transition:all var(--transition)}
.form-submit:hover{background:var(--indigo-700);transform:translateY(-2px);box-shadow:0 12px 30px rgba(91,106,191,0.3)}

/* ── Footer ── */
.footer{background:var(--indigo-950);color:var(--slate-300);padding:48px 0 32px}
.footer-inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:24px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:1.1rem;font-weight:800;color:#fff}
.footer-brand svg{width:28px;height:28px}
.footer-links{display:flex;gap:24px;list-style:none;flex-wrap:wrap}
.footer-links a{font-size:0.85rem;color:var(--slate-400);transition:color var(--transition)}
.footer-links a:hover{color:#fff}
.footer-bottom{text-align:center;margin-top:32px;padding-top:24px;border-top:1px solid rgba(255,255,255,0.1);font-size:0.8rem;color:var(--slate-500)}

/* ── Scroll Reveal ── */
.reveal{opacity:0;transform:translateY(20px);transition:opacity 0.6s ease,transform 0.6s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ── Mock UI Components ── */
.mock-ui{background:var(--bg-card);border-radius:var(--radius);border:1px solid var(--border);overflow:hidden;font-size:0.78rem;color:var(--text-secondary)}
.mock-topbar{display:flex;align-items:center;justify-content:space-between;padding:10px 16px;background:var(--indigo-950);color:#fff;font-size:0.72rem;font-weight:600}
.mock-sidebar{width:200px;background:var(--slate-100);border-right:1px solid var(--border);padding:12px}
.mock-sidebar-item{padding:8px 12px;border-radius:var(--radius-sm);margin-bottom:4px;font-size:0.75rem;cursor:default}
.mock-sidebar-item.active{background:var(--accent-light);color:var(--accent);font-weight:600}
.mock-content{flex:1;padding:20px}
.mock-body{display:flex;min-height:280px}
.mock-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px;margin-bottom:8px}
.mock-badge{display:inline-block;padding:2px 8px;border-radius:var(--radius-full);font-size:0.65rem;font-weight:700}
.mock-row{display:flex;gap:8px;align-items:center;padding:6px 0;border-bottom:1px solid var(--border-subtle)}
.mock-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}

/* ── Responsive ── */
@media(max-width:1024px){
  .hero-inner{grid-template-columns:1fr;text-align:center}
  .hero-desc{margin:0 auto 36px}
  .hero-actions{justify-content:center}
  .hero-visual{order:-1;margin-bottom:20px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .pillars-grid,.pillars-row-bottom{grid-template-columns:repeat(2,1fr)}
  .crystal-cta{flex-direction:column;text-align:center}
}
@media(max-width:768px){
  .nav-links,.nav-login{display:none}
  .hamburger{display:flex}
  .nav-links.open{display:flex;flex-direction:column;position:absolute;top:56px;left:0;right:0;background:var(--bg-card);padding:24px;border-bottom:1px solid var(--border);box-shadow:var(--shadow-lg);gap:16px}
  .nav-links.open .lang-switcher{justify-content:center}
  section{padding:60px 0}
  .features-grid{grid-template-columns:1fr}
  .ai-grid{grid-template-columns:1fr}
  .domains-grid{grid-template-columns:repeat(2,1fr)}
  .pillars-grid,.pillars-row-bottom{grid-template-columns:1fr 1fr}
  .form-row{grid-template-columns:1fr}
  .footer-inner{flex-direction:column;text-align:center}
  .mock-sidebar{display:none}
}

/* ── Counters Animation ── */
@keyframes countUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
.stat-number.animated{animation:countUp 0.5s ease forwards}