/* ================================================
   COURSEBREAK — MODERN EXECUTIVE EDUCATION THEME
   White • Blue • Pink • Orange
   ================================================ */

:root {
  /* Brand Colors — from CourseBreak logo */
  --cb-navy: #1B2A4A;
  --cb-navy-light: #2D3E66;
  --cb-navy-dark: #111D35;
  --cb-pink: #E91E8C;
  --cb-pink-light: #F54DA6;
  --cb-pink-dark: #C4176F;
  --cb-pink-muted: rgba(233, 30, 140, 0.08);
  --cb-orange: #F7941D;
  --cb-orange-light: #FFAB42;
  --cb-orange-dark: #D97B0A;
  --cb-purple: #8B5CF6;
  --cb-purple-light: #A78BFA;

  /* Gradient — signature brand gradient */
  --cb-gradient: linear-gradient(135deg, #E91E8C 0%, #F7941D 100%);
  --cb-gradient-reverse: linear-gradient(135deg, #F7941D 0%, #E91E8C 100%);
  --cb-gradient-full: linear-gradient(135deg, #8B5CF6 0%, #E91E8C 40%, #F7941D 100%);
  --cb-gradient-subtle: linear-gradient(135deg, rgba(233,30,140,0.06) 0%, rgba(247,148,29,0.06) 100%);

  /* Neutrals */
  --white: #FFFFFF;
  --off-white: #FAFBFC;
  --gray-50: #F8FAFC;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-300: #CBD5E1;
  --gray-400: #94A3B8;
  --gray-500: #64748B;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1E293B;
  --gray-900: #0F172A;

  /* Typography */
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-accent: 'Playfair Display', Georgia, serif;

  /* Spacing */
  --section-padding: clamp(4rem, 8vw, 7rem);
  --container-max: 1280px;
  --container-padding: clamp(1.5rem, 4vw, 3rem);

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(27, 42, 74, 0.04);
  --shadow-md: 0 4px 12px rgba(27, 42, 74, 0.06);
  --shadow-lg: 0 12px 32px rgba(27, 42, 74, 0.08);
  --shadow-xl: 0 24px 48px rgba(27, 42, 74, 0.10);
  --shadow-pink: 0 8px 24px rgba(233, 30, 140, 0.15);
  --shadow-card: 0 1px 3px rgba(27, 42, 74, 0.04), 0 1px 2px rgba(27, 42, 74, 0.06);
  --shadow-card-hover: 0 16px 48px rgba(27, 42, 74, 0.10);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ================================================
   BASE STYLES
   ================================================ */
html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  color: var(--gray-700);
  background-color: var(--white);
  line-height: 1.7;
  margin-bottom: 60px;
  letter-spacing: -0.01em;
}

/* ================================================
   TYPOGRAPHY
   ================================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--cb-navy);
  line-height: 1.15;
}

h1 { font-size: clamp(2.5rem, 5vw, 3.75rem); }
h2 { font-size: clamp(2rem, 4vw, 2.75rem); }
h3 { font-size: clamp(1.4rem, 3vw, 1.75rem); }
h4 { font-size: clamp(1.15rem, 2vw, 1.35rem); }

.font-display { font-family: var(--font-display); }
.font-accent { font-family: var(--font-accent); }

.text-gradient {
  background: var(--cb-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-navy { color: var(--cb-navy) !important; }
.text-pink { color: var(--cb-pink) !important; }
.text-orange { color: var(--cb-orange) !important; }
.bg-navy { background-color: var(--cb-navy) !important; }
.bg-off-white { background-color: var(--off-white) !important; }

/* ================================================
   FOCUS STATES — ACCESSIBILITY
   ================================================ */
.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem var(--cb-pink);
}

*:focus-visible {
  outline: 2px solid var(--cb-pink) !important;
  outline-offset: 2px !important;
}

/* ================================================
   BUTTONS
   ================================================ */
.btn-primary-cb {
  background: var(--cb-gradient);
  color: white;
  padding: 0.875rem 2.25rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: -0.01em;
  border: none;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-pink);
}

.btn-primary-cb:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(233, 30, 140, 0.25);
}

.btn-outline-cb {
  background: transparent;
  color: var(--cb-navy);
  padding: 0.875rem 2.25rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: -0.01em;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.btn-outline-cb:hover {
  border-color: var(--cb-pink);
  color: var(--cb-pink);
  background: var(--cb-pink-muted);
}

/* ================================================
   CARDS
   ================================================ */
.card-cb {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.card-cb:hover {
  border-color: transparent;
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.card-premium {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
  transition: all var(--transition-slow);
}

.card-premium:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
}

/* ================================================
   FORM ELEMENTS
   ================================================ */
.form-floating > .form-control-plaintext::placeholder,
.form-floating > .form-control::placeholder {
  color: var(--gray-400);
  text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder,
.form-floating > .form-control:focus::placeholder {
  text-align: start;
}

.input-cb {
  padding: 1rem 1.5rem;
  font-size: 0.95rem;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-md);
  background: var(--white);
  transition: all var(--transition-base);
  font-family: var(--font-body);
}

.input-cb:focus {
  border-color: var(--cb-pink);
  box-shadow: 0 0 0 3px var(--cb-pink-muted);
  outline: none;
}

.input-cb::placeholder {
  color: var(--gray-400);
  font-weight: 400;
}

/* ================================================
   NAVIGATION
   ================================================ */
.nav-link-cb {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--gray-600);
  padding: 0.5rem 0;
  position: relative;
  transition: color var(--transition-base);
}

.nav-link-cb::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--cb-gradient);
  border-radius: 1px;
  transition: width var(--transition-base);
}

.nav-link-cb:hover { color: var(--cb-pink); }
.nav-link-cb:hover::after { width: 100%; }

/* ================================================
   SECTIONS
   ================================================ */
.section-cb { padding: var(--section-padding) 0; }
.section-white { background: var(--white); }
.section-light { background: var(--gray-50); }
.section-navy { background: var(--cb-navy); color: white; }
.section-navy h2, .section-navy h3 { color: white; }

.divider-gradient {
  width: 60px;
  height: 3px;
  background: var(--cb-gradient);
  border-radius: 2px;
  margin: 1.5rem 0;
}

.divider-center {
  margin-left: auto;
  margin-right: auto;
}

/* ================================================
   BADGES & LABELS
   ================================================ */
.badge-cb {
  display: inline-block;
  padding: 0.4rem 1rem;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: var(--cb-pink-muted);
  color: var(--cb-pink);
  border-radius: var(--radius-full);
}

.badge-navy {
  background: var(--cb-navy);
  color: white;
}

.badge-gradient {
  background: var(--cb-gradient);
  color: white;
}

/* ================================================
   STATISTICS
   ================================================ */
.stat-cb { text-align: center; padding: 2rem; }

.stat-number-cb {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
}

.stat-label-cb {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--gray-500);
  margin-top: 0.5rem;
}

/* ================================================
   BLOCKQUOTES
   ================================================ */
.quote-cb {
  position: relative;
  padding: 2rem 2.5rem;
  font-family: var(--font-accent);
  font-size: 1.35rem;
  font-style: italic;
  color: var(--gray-700);
  border-left: 3px solid transparent;
  border-image: var(--cb-gradient) 1;
  background: var(--gray-50);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

/* ================================================
   LOADING & PRELOADER
   ================================================ */
.preloader-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  text-align: center;
}

.preloader-wrapper .spinner-border {
  width: 3rem;
  height: 3rem;
  border-color: var(--cb-pink);
  border-right-color: transparent;
}

.preloader-wrapper p {
  margin-top: 1rem;
  color: var(--gray-500);
  font-size: 0.9rem;
  font-weight: 400;
}

.spinner-cb {
  width: 36px;
  height: 36px;
  border: 2.5px solid var(--gray-200);
  border-top-color: var(--cb-pink);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ================================================
   HOVER EFFECTS
   ================================================ */
.hover-lift {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.hover-glow { transition: box-shadow var(--transition-base); }
.hover-glow:hover { box-shadow: 0 0 24px var(--cb-pink-muted); }

/* ================================================
   DECORATIVE ELEMENTS
   ================================================ */
.gradient-line {
  height: 3px;
  background: var(--cb-gradient);
  border-radius: 2px;
}

.gradient-dot {
  width: 8px;
  height: 8px;
  background: var(--cb-gradient);
  border-radius: 50%;
  display: inline-block;
}

/* ================================================
   SCROLL ANIMATIONS
   ================================================ */
.fade-in-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ================================================
   RESPONSIVE
   ================================================ */
@media (max-width: 768px) {
  :root {
    --section-padding: 3rem;
    --container-padding: 1.5rem;
  }

  .stat-number-cb { font-size: 2.2rem; }
  .quote-cb { padding: 1.5rem 2rem; font-size: 1.15rem; }
}

/* ================================================
   PRINT
   ================================================ */
@media print {
  .no-print { display: none !important; }
  body { background: white; color: black; }
  a[href]::after {
    content: ' (' attr(href) ')';
    font-size: 0.8em;
    color: var(--gray-500);
  }
}

/* ================================================
   ACCESSIBILITY
   ================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@media (prefers-contrast: high) {
  .card-cb, .card-premium { border-width: 2px; }
}

/* ================================================
   UTILITIES
   ================================================ */
.container-cb {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.text-balance { text-wrap: balance; }
.font-light { font-weight: 300; }
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

::selection {
  background-color: var(--cb-pink);
  color: white;
}

::-moz-selection {
  background-color: var(--cb-pink);
  color: white;
}