/* =========================================
   Proceno — Design System v3
   Premium data platform aesthetic
   ========================================= */

/* === Custom Properties === */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-darker: #1e3a8a;
  --primary-hover: #1d4ed8;
  --primary-light: #dbeafe;
  --primary-50: #eff6ff;
  --accent: #6366f1;
  --accent-light: #e0e7ff;
  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;
  --bg: #f1f5f9;
  --bg-elevated: #f8fafc;
  --surface: #ffffff;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --success: #16a34a;
  --success-light: #dcfce7;
  --warning: #d97706;
  --warning-light: #fef3c7;
  --danger: #dc2626;
  --danger-light: #fef2f2;
  --orange: #ea580c;
  --orange-light: #fff7ed;
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --shadow-glow: 0 0 20px rgba(37,99,235,0.15);
  --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 0 0 1px rgba(0,0,0,0.02);
  --shadow-card-hover: 0 8px 25px -5px rgba(0,0,0,0.1), 0 0 0 1px rgba(37,99,235,0.08);
  --gradient-brand: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  --gradient-hero: linear-gradient(135deg, #1e3a8a 0%, #2563eb 40%, #6366f1 100%);
  --gradient-subtle: linear-gradient(135deg, rgba(37,99,235,0.03) 0%, rgba(99,102,241,0.03) 100%);
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration: 0.2s;
  --duration-slow: 0.35s;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --font-mono: 'SF Mono', SFMono-Regular, ui-monospace, Menlo, Consolas, monospace;
}

/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  min-height: 100vh;
  background-image: radial-gradient(ellipse at 30% 0%, rgba(37,99,235,0.04) 0%, transparent 50%),
                    radial-gradient(ellipse at 70% 100%, rgba(99,102,241,0.03) 0%, transparent 50%);
  background-attachment: fixed;
}
a { color: var(--primary); text-decoration: none; transition: color var(--duration) var(--ease); }
a:hover { color: var(--primary-dark); }
::selection { background: var(--primary-light); color: var(--primary-dark); }

/* === Layout === */
.container { max-width: 1280px; margin: 0 auto; padding: 0 1.5rem; }

/* === Navbar === */
.navbar {
  background: linear-gradient(135deg, #0f172a 0%, var(--primary-darker) 50%, #1e3a5f 100%);
  color: var(--text-inverse);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 4px 20px rgba(0,0,0,0.08);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.nav-content { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.logo {
  color: var(--text-inverse);
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  transition: all var(--duration) var(--ease);
}
.logo:hover { text-decoration: none; filter: brightness(1.15); transform: scale(1.02); }
.logo span { font-weight: 400; letter-spacing: 0.02em; }
.logo strong { font-weight: 800; color: #93c5fd; }
.logo svg { opacity: 0.85; }
.nav-links { display: flex; gap: 0.25rem; }
.nav-link {
  color: rgba(255,255,255,0.65);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  transition: all var(--duration) var(--ease);
  font-size: 0.875rem;
  font-weight: 500;
  position: relative;
}
.nav-link:hover { color: var(--text-inverse); background: rgba(255,255,255,0.08); text-decoration: none; }
.nav-link.active {
  color: var(--text-inverse);
  background: rgba(255,255,255,0.12);
  font-weight: 600;
}
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 2px;
  background: #93c5fd;
  border-radius: 1px;
}
.menu-toggle { display: none; background: none; border: none; color: var(--text-inverse); cursor: pointer; padding: 0.5rem; border-radius: var(--radius-sm); }
.menu-toggle:hover { background: rgba(255,255,255,0.1); }