/* ==========================================================================
   Base Design Tokens & CSS Variables
   ========================================================================== */
:root {
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: #eef2ff;
  --secondary: #06b6d4;

  /* Playful Vibrant Palette */
  --coral: #ff6b6b;
  --coral-light: #ffe3e3;
  --sun: #ffd43b;
  --sun-light: #fff9db;
  --mint: #20c997;
  --mint-light: #e6fcf5;
  --sky: #38bdf8;
  --sky-light: #e0f2fe;
  --purple: #8b5cf6;
  --purple-light: #f3e8ff;

  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;

  --bg-main: #f8faff;
  --bg-card: #ffffff;
  --bg-alt: #f1f5f9;

  --text-main: #1e1b4b;
  --text-muted: #64748b;
  --text-light: #94a3b8;

  --border: #e0e7ff;
  --border-focus: #818cf8;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  /* Claymorphism 3D Shadows */
  --clay-card: 14px 18px 30px -4px rgba(99, 102, 241, 0.12),
               inset -6px -6px 14px rgba(99, 102, 241, 0.06),
               inset 6px 6px 14px rgba(255, 255, 255, 0.95);

  --clay-card-hover: 18px 26px 38px -4px rgba(99, 102, 241, 0.18),
                     inset -6px -6px 14px rgba(99, 102, 241, 0.08),
                     inset 6px 6px 14px rgba(255, 255, 255, 1);

  --clay-btn-primary: 6px 10px 20px rgba(99, 102, 241, 0.35),
                      inset -3px -3px 8px rgba(0, 0, 0, 0.2),
                      inset 3px 3px 8px rgba(255, 255, 255, 0.6);

  --clay-btn-coral: 6px 10px 20px rgba(255, 107, 107, 0.35),
                    inset -3px -3px 8px rgba(0, 0, 0, 0.2),
                    inset 3px 3px 8px rgba(255, 255, 255, 0.6);

  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-fun: 'Fredoka', 'Plus Jakarta Sans', cursive, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ==========================================================================
   CSS Reset & Global Shell
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-hover);
}

.main-content {
  flex: 1;
  max-width: 1280px;
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 4rem;
}


/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  font-family: inherit;
  font-size: 0.925rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
}

.btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--primary);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-hover);
}

.btn-outline {
  border-color: var(--border);
  background-color: var(--bg-card);
  color: var(--text-main);
}

.btn-outline:hover:not(:disabled) {
  background-color: var(--bg-alt);
  border-color: var(--text-light);
}

.btn-danger-outline {
  border-color: #fecaca;
  background-color: transparent;
  color: var(--danger);
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
}

.btn-danger-outline:hover {
  background-color: #fee2e2;
}

.btn-block {
  width: 100%;
}

/* ==========================================================================
   Loading Skeleton & Spinners
   ========================================================================== */
.page-loading-skeleton {
  min-height: 350px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  color: var(--text-muted);
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ==========================================================================
   Toast Notification System
   ========================================================================== */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  z-index: 999;
}

.toast {
  min-width: 280px;
  max-width: 400px;
  background-color: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.15rem;
  box-shadow: var(--shadow-lg);
  border-left: 4px solid var(--primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  animation: slideUp 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 0.9rem;
}

.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--danger); }
.toast.info { border-left-color: var(--primary); }

@keyframes slideUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}