/**
 * IntervAI Pro - Main CSS & Design Tokens
 */

:root {
  --bg-primary: #090d16;
  --bg-secondary: #0f172a;
  --bg-surface: #1e293b;
  --bg-glass: rgba(30, 41, 59, 0.7);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(99, 102, 241, 0.4);

  --color-primary: #6366f1;
  --color-primary-glow: rgba(99, 102, 241, 0.35);
  --color-cyan: #06b6d4;
  --color-sky: #38bdf8;
  --color-emerald: #10b981;
  --color-amber: #f59e0b;
  --color-rose: #f43f5e;
  --color-purple: #a855f7;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --font-heading: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;

  --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.25);
  --shadow-cyan-glow: 0 0 25px rgba(6, 182, 212, 0.25);
}

body.light-theme {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-surface: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --border-glass: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(99, 102, 241, 0.6);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.06);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  min-height: 100vh;
  overflow-x: hidden;
  background-image: 
    radial-gradient(at 10% 10%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
    radial-gradient(at 90% 90%, rgba(6, 182, 212, 0.1) 0px, transparent 50%);
}

/* Custom Smooth Scrollbar */
::-webkit-scrollbar {
  width: 7px;
  height: 7px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-surface);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}

/* Top App Header / Navbar */
.app-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(16px);
  background: var(--bg-glass);
  border-bottom: 1px solid var(--border-glass);
  padding: 0.75rem 2rem;
}

.header-container {
  max-width: 1440px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  text-decoration: none;
}

.brand-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-cyan));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: #ffffff;
  box-shadow: var(--shadow-glow);
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #ffffff 40%, var(--color-sky));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-tag {
  background: var(--color-primary-glow);
  color: var(--color-sky);
  border: 1px solid var(--color-primary);
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
}

.nav-link {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.nav-link.active {
  color: #ffffff;
  background: var(--color-primary);
  box-shadow: var(--shadow-glow);
}

.header-right-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Glassmorphism Card utility */
.card-glass {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-subtle);
  transition: all 0.25s ease;
}

.card-glass:hover {
  border-color: var(--border-hover);
}

/* Buttons */
.btn {
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: none;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), #4f46e5);
  color: #ffffff;
  box-shadow: 0 4px 15px var(--color-primary-glow);
}

.btn-primary:hover {
  filter: brightness(1.15);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px var(--color-primary-glow);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-glass);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--text-secondary);
}

.btn-success {
  background: linear-gradient(135deg, var(--color-emerald), #059669);
  color: #ffffff;
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.8rem;
}

.btn-icon-only {
  padding: 0.55rem;
  border-radius: 50%;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Badges */
.badge {
  padding: 0.25rem 0.65rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.badge-easy { background: rgba(16, 185, 129, 0.15); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.3); }
.badge-med { background: rgba(245, 158, 11, 0.15); color: #fbbf24; border: 1px solid rgba(245, 158, 11, 0.3); }
.badge-hard { background: rgba(244, 63, 94, 0.15); color: #fb7185; border: 1px solid rgba(244, 63, 94, 0.3); }

.badge-strong-hire { background: rgba(16, 185, 129, 0.2); color: #10b981; border: 1px solid #10b981; }
.badge-hire { background: rgba(56, 189, 248, 0.2); color: #38bdf8; border: 1px solid #38bdf8; }
.badge-lean { background: rgba(245, 158, 11, 0.2); color: #f59e0b; border: 1px solid #f59e0b; }
.badge-needs-work { background: rgba(244, 63, 94, 0.2); color: #f43f5e; border: 1px solid #f43f5e; }

/* Text Utility Colors */
.text-indigo { color: var(--color-primary); }
.text-cyan { color: var(--color-cyan); }
.text-emerald { color: var(--color-emerald); }
.text-amber { color: var(--color-amber); }
.text-rose { color: var(--color-rose); }

/* Main Views Container */
.view-container {
  display: none;
  max-width: 1440px;
  margin: 0 auto;
  padding: 1.5rem 2rem;
  animation: fadeIn 0.3s ease;
}

.view-container.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Toast Popups */
.toast-popup {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 2000;
  background: var(--bg-surface);
  color: #ffffff;
  padding: 0.85rem 1.35rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-glass);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  font-weight: 500;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast-popup.show {
  transform: translateY(0);
  opacity: 1;
}

.toast-popup.toast-success { border-left: 4px solid var(--color-emerald); }
.toast-popup.toast-warning { border-left: 4px solid var(--color-amber); }
.toast-popup.toast-info { border-left: 4px solid var(--color-cyan); }