/* ========================================
   ZONE INTELLIGENCE SYSTEM - Core Styles
   ======================================== */

:root {
  --primary-dark: #0a0e1a;
  --secondary-dark: #111827;
  --card-bg: #161d2e;
  --card-border: #1e2d45;
  --accent-blue: #1a6fc4;
  --accent-cyan: #00c9e4;
  --accent-gold: #e8b84b;
  --accent-green: #22c55e;
  --accent-red: #ef4444;
  --text-primary: #f0f4ff;
  --text-secondary: #8fa3c0;
  --text-muted: #4a6080;
  --zone1-color: #ef4444;
  --zone2-color: #e8b84b;
  --zone3-color: #22c55e;
  --gradient-hero: linear-gradient(135deg, #0a0e1a 0%, #0d1829 40%, #0a1628 100%);
  --gradient-card: linear-gradient(145deg, #161d2e, #111827);
  --gradient-blue: linear-gradient(135deg, #1a6fc4, #00c9e4);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
  background: var(--primary-dark);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5 { font-weight: 700; letter-spacing: -0.02em; line-height: 1.2; }
h1 { font-size: clamp(2rem, 5vw, 4rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.5rem); }
p { line-height: 1.7; color: var(--text-secondary); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

.section-title { text-align: center; margin-bottom: 3rem; }
.section-title h2 {
  background: var(--gradient-blue);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  margin-bottom: 0.75rem;
}
.section-title p { font-size: 1.1rem; color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

.badge {
  display: inline-block; padding: 0.25rem 0.85rem; border-radius: 50px;
  font-size: 0.75rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase;
}
.badge-blue { background: rgba(26,111,196,0.2); color: var(--accent-cyan); border: 1px solid rgba(0,201,228,0.3); }
.badge-gold { background: rgba(232,184,75,0.15); color: var(--accent-gold); border: 1px solid rgba(232,184,75,0.3); }
.badge-green { background: rgba(34,197,94,0.15); color: var(--accent-green); border: 1px solid rgba(34,197,94,0.3); }

.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.75rem 2rem; border-radius: 8px; font-size: 0.95rem; font-weight: 600;
  cursor: pointer; border: none; transition: all 0.25s ease; text-decoration: none;
  font-family: inherit;
}
.btn-primary { background: var(--gradient-blue); color: #fff; box-shadow: 0 0 20px rgba(0,201,228,0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 30px rgba(0,201,228,0.5); }
.btn-outline { background: transparent; color: var(--accent-cyan); border: 1.5px solid var(--accent-cyan); }
.btn-outline:hover { background: rgba(0,201,228,0.1); transform: translateY(-2px); }
.btn-gold { background: linear-gradient(135deg, #e8b84b, #f0c96a); color: #0a0e1a; }
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 0 20px rgba(232,184,75,0.4); }
.btn-lg { padding: 1rem 2.5rem; font-size: 1.05rem; }

.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(10,14,26,0.95); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border); padding: 0.85rem 0;
}
.navbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1200px; margin: 0 auto; padding: 0 1.5rem;
}
.logo { display: flex; align-items: center; gap: 0.65rem; text-decoration: none; }
.logo-icon {
  width: 38px; height: 38px; background: var(--gradient-blue); border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 900; font-size: 1.1rem; color: #fff;
}
.logo-text { display: flex; flex-direction: column; line-height: 1.1; }
.logo-text span:first-child { font-size: 0.9rem; font-weight: 800; color: var(--text-primary); letter-spacing: 0.05em; }
.logo-text span:last-child { font-size: 0.65rem; color: var(--accent-cyan); letter-spacing: 0.12em; text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: 0.25rem; list-style: none; }
.nav-links a { padding: 0.4rem 0.9rem; color: var(--text-secondary); text-decoration: none; font-size: 0.9rem; font-weight: 500; border-radius: 6px; transition: all 0.2s; }
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); background: rgba(255,255,255,0.06); }
.nav-cta { display: flex; gap: 0.75rem; align-items: center; }

.card { background: var(--gradient-card); border: 1px solid var(--card-border); border-radius: 14px; padding: 1.75rem; transition: all 0.3s ease; }
.card:hover { border-color: rgba(0,201,228,0.3); transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,0,0,0.4); }

.form-group { margin-bottom: 1.25rem; }
.form-label { display: block; font-size: 0.85rem; font-weight: 600; color: var(--text-secondary); margin-bottom: 0.4rem; letter-spacing: 0.05em; text-transform: uppercase; }
.form-control {
  width: 100%; padding: 0.75rem 1rem;
  background: rgba(255,255,255,0.05); border: 1px solid var(--card-border);
  border-radius: 8px; color: var(--text-primary); font-size: 0.95rem;
  font-family: inherit; transition: border-color 0.2s;
}
.form-control:focus { outline: none; border-color: var(--accent-cyan); background: rgba(0,201,228,0.05); }
.form-control::placeholder { color: var(--text-muted); }
select.form-control option { background: var(--secondary-dark); color: var(--text-primary); }

.upload-zone {
  border: 2px dashed var(--card-border); border-radius: 12px;
  padding: 2.5rem 1.5rem; text-align: center; cursor: pointer;
  transition: all 0.3s; background: rgba(26,111,196,0.03);
}
.upload-zone:hover, .upload-zone.dragover { border-color: var(--accent-cyan); background: rgba(0,201,228,0.06); }
.upload-icon { font-size: 2.5rem; margin-bottom: 0.75rem; opacity: 0.6; }
.upload-zone p { font-size: 0.9rem; color: var(--text-muted); }
.upload-zone strong { color: var(--accent-cyan); }

.stat-card { background: var(--gradient-card); border: 1px solid var(--card-border); border-radius: 12px; padding: 1.25rem 1.5rem; text-align: center; }
.stat-value { font-size: 2.2rem; font-weight: 800; line-height: 1; margin-bottom: 0.3rem; }
.stat-label { font-size: 0.78rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.08em; }

.zone1 { color: var(--zone1-color); }
.zone2 { color: var(--zone2-color); }
.zone3 { color: var(--zone3-color); }

.progress-bar-wrap { background: rgba(255,255,255,0.06); border-radius: 50px; height: 8px; overflow: hidden; margin-top: 0.4rem; }
.progress-bar-fill { height: 100%; border-radius: 50px; transition: width 1s ease; }

.divider { height: 1px; background: var(--card-border); margin: 2rem 0; }

.alert { padding: 1rem 1.25rem; border-radius: 10px; font-size: 0.9rem; display: flex; align-items: flex-start; gap: 0.75rem; margin-bottom: 1rem; }
.alert-info { background: rgba(0,201,228,0.08); border: 1px solid rgba(0,201,228,0.2); color: var(--accent-cyan); }
.alert-success { background: rgba(34,197,94,0.08); border: 1px solid rgba(34,197,94,0.2); color: var(--accent-green); }

.toast-container { position: fixed; bottom: 2rem; right: 2rem; z-index: 9999; display: flex; flex-direction: column; gap: 0.75rem; }
.toast { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 10px; padding: 1rem 1.25rem; min-width: 280px; box-shadow: 0 8px 32px rgba(0,0,0,0.5); display: flex; align-items: center; gap: 0.75rem; animation: slideIn 0.3s ease; }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

.page-header { padding: 7rem 0 3rem; background: linear-gradient(180deg, rgba(26,111,196,0.08) 0%, transparent 100%); border-bottom: 1px solid var(--card-border); margin-bottom: 3rem; }
.page-header h1 { font-size: clamp(1.8rem, 4vw, 3rem); margin-bottom: 0.5rem; }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }

@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}

.spinner { width: 40px; height: 40px; border: 3px solid rgba(0,201,228,0.2); border-top-color: var(--accent-cyan); border-radius: 50%; animation: spin 0.8s linear infinite; margin: 1rem auto; }
@keyframes spin { to { transform: rotate(360deg); } }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--primary-dark); }
::-webkit-scrollbar-thumb { background: var(--card-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-blue); }

footer { background: var(--secondary-dark); border-top: 1px solid var(--card-border); padding: 2.5rem 0; text-align: center; margin-top: 5rem; }
footer p { font-size: 0.85rem; color: var(--text-muted); }