/* =============================================================
   CourseFlow — Main Stylesheet v1.0.0
   Author: Websolute Codes | websolutecodes.cc
   ============================================================= */

/* ── 1. Design Tokens ─────────────────────────────────────── */
:root {
  /* Palette */
  --cf-primary:        #6366f1;
  --cf-primary-dark:   #4f46e5;
  --cf-primary-light:  #818cf8;
  --cf-primary-50:     #eef2ff;
  --cf-primary-100:    #e0e7ff;
  --cf-accent:         #f59e0b;
  --cf-accent-dark:    #d97706;
  --cf-accent-light:   #fcd34d;
  --cf-success:        #10b981;
  --cf-warning:        #f59e0b;
  --cf-error:          #ef4444;
  --cf-info:           #3b82f6;

  /* Neutral scale */
  --cf-900:  #0f172a;
  --cf-800:  #1e293b;
  --cf-700:  #334155;
  --cf-600:  #475569;
  --cf-500:  #64748b;
  --cf-400:  #94a3b8;
  --cf-300:  #cbd5e1;
  --cf-200:  #e2e8f0;
  --cf-100:  #f1f5f9;
  --cf-50:   #f8fafc;

  /* Semantic surfaces */
  --cf-bg:         #ffffff;
  --cf-bg-2:       var(--cf-50);
  --cf-bg-3:       var(--cf-100);
  --cf-surface:    #ffffff;
  --cf-border:     var(--cf-200);
  --cf-text:       var(--cf-900);
  --cf-text-muted: var(--cf-500);
  --cf-text-faint: var(--cf-400);

  /* Typography */
  --cf-font-sans:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --cf-font-display: 'Plus Jakarta Sans', var(--cf-font-sans);
  --cf-font-mono:    'JetBrains Mono', 'Fira Code', monospace;
  --cf-text-xs:   0.75rem;
  --cf-text-sm:   0.875rem;
  --cf-text-base: 1rem;
  --cf-text-lg:   1.125rem;
  --cf-text-xl:   1.25rem;
  --cf-text-2xl:  1.5rem;
  --cf-text-3xl:  1.875rem;
  --cf-text-4xl:  2.25rem;
  --cf-text-5xl:  3rem;
  --cf-text-6xl:  3.75rem;
  --cf-leading-tight:  1.25;
  --cf-leading-snug:   1.375;
  --cf-leading-normal: 1.6;
  --cf-leading-loose:  1.8;
  --cf-tracking-tight: -0.025em;
  --cf-tracking-wide:   0.025em;

  /* Spacing scale */
  --cf-1:   0.25rem;
  --cf-2:   0.5rem;
  --cf-3:   0.75rem;
  --cf-4:   1rem;
  --cf-5:   1.25rem;
  --cf-6:   1.5rem;
  --cf-8:   2rem;
  --cf-10:  2.5rem;
  --cf-12:  3rem;
  --cf-16:  4rem;
  --cf-20:  5rem;
  --cf-24:  6rem;

  /* Border radius */
  --cf-r-sm:   0.375rem;
  --cf-r-md:   0.75rem;
  --cf-r-lg:   1rem;
  --cf-r-xl:   1.5rem;
  --cf-r-2xl:  2rem;
  --cf-r-full: 9999px;

  /* Shadows */
  --cf-shadow-xs: 0 1px 2px rgba(0,0,0,.05);
  --cf-shadow-sm: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --cf-shadow-md: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -2px rgba(0,0,0,.1);
  --cf-shadow-lg: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -4px rgba(0,0,0,.1);
  --cf-shadow-xl: 0 20px 25px -5px rgba(0,0,0,.1), 0 8px 10px -6px rgba(0,0,0,.1);
  --cf-shadow-2xl:0 25px 50px -12px rgba(0,0,0,.25);
  --cf-shadow-glow: 0 0 40px rgba(99,102,241,.25);
  --cf-shadow-accent: 0 0 40px rgba(245,158,11,.25);

  /* Transitions */
  --cf-ease:      cubic-bezier(0.4,0,0.2,1);
  --cf-ease-in:   cubic-bezier(0.4,0,1,1);
  --cf-ease-out:  cubic-bezier(0,0,0.2,1);
  --cf-ease-spring: cubic-bezier(0.34,1.56,0.64,1);
  --cf-t-fast:   all 0.15s var(--cf-ease);
  --cf-t:        all 0.25s var(--cf-ease);
  --cf-t-slow:   all 0.4s var(--cf-ease);

  /* Glass */
  --cf-glass-bg:     rgba(255,255,255,.08);
  --cf-glass-border: rgba(255,255,255,.15);

  /* Layout */
  --cf-container:      1280px;
  --cf-container-sm:   768px;
  --cf-container-md:   1024px;
  --cf-header-h:       72px;
  --cf-sidebar-w:      300px;
}

/* Dark mode */
[data-theme="dark"], .dark-mode {
  --cf-bg:         var(--cf-900);
  --cf-bg-2:       var(--cf-800);
  --cf-bg-3:       var(--cf-700);
  --cf-surface:    var(--cf-800);
  --cf-border:     var(--cf-700);
  --cf-text:       #f1f5f9;
  --cf-text-muted: var(--cf-400);
  --cf-text-faint: var(--cf-500);
  --cf-glass-bg:   rgba(0,0,0,.2);
  --cf-link:       #a78bfa;
  --cf-link-hover: #c4b5fd;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --cf-bg:         var(--cf-900);
    --cf-bg-2:       var(--cf-800);
    --cf-bg-3:       var(--cf-700);
    --cf-surface:    var(--cf-800);
    --cf-border:     var(--cf-700);
    --cf-text:       #f1f5f9;
    --cf-text-muted: var(--cf-400);
    --cf-text-faint: var(--cf-500);
    --cf-link:       #a78bfa;
    --cf-link-hover: #c4b5fd;
  }
}

/* ── 2. Reset & Base ──────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--cf-font-sans);
  font-size: var(--cf-text-base);
  line-height: var(--cf-leading-normal);
  color: var(--cf-text);
  background-color: var(--cf-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, video { max-width: 100%; height: auto; display: block; }
a { color: var(--cf-link, var(--cf-primary)); text-decoration: none; transition: var(--cf-t-fast); }
a:hover { color: var(--cf-link-hover, var(--cf-primary-dark)); }
a:focus-visible { outline: 2px solid var(--cf-primary); outline-offset: 3px; border-radius: 3px; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--cf-font-display);
  font-weight: 700;
  line-height: var(--cf-leading-tight);
  letter-spacing: var(--cf-tracking-tight);
  color: var(--cf-text);
}
h1 { font-size: clamp(2rem, 5vw, var(--cf-text-5xl)); }
h2 { font-size: clamp(1.5rem, 3.5vw, var(--cf-text-4xl)); }
h3 { font-size: clamp(1.25rem, 2.5vw, var(--cf-text-3xl)); }
h4 { font-size: var(--cf-text-2xl); }
h5 { font-size: var(--cf-text-xl); }
h6 { font-size: var(--cf-text-lg); }

p { margin-bottom: var(--cf-4); color: var(--cf-text-muted); }
p:last-child { margin-bottom: 0; }

ul, ol { padding-left: var(--cf-6); margin-bottom: var(--cf-4); }
li { margin-bottom: var(--cf-1); }

blockquote {
  border-left: 4px solid var(--cf-primary);
  padding: var(--cf-4) var(--cf-6);
  background: var(--cf-primary-50);
  border-radius: 0 var(--cf-r-md) var(--cf-r-md) 0;
  margin: var(--cf-8) 0;
  font-style: italic;
  color: var(--cf-text-muted);
}

code, pre {
  font-family: var(--cf-font-mono);
  font-size: 0.9em;
}
code {
  background: var(--cf-bg-3);
  padding: 0.1em 0.4em;
  border-radius: var(--cf-r-sm);
  color: var(--cf-primary-dark);
}
pre {
  background: var(--cf-900);
  color: #e2e8f0;
  padding: var(--cf-6);
  border-radius: var(--cf-r-lg);
  overflow-x: auto;
  margin: var(--cf-8) 0;
}
pre code { background: none; color: inherit; padding: 0; }

hr { border: none; border-top: 1px solid var(--cf-border); margin: var(--cf-12) 0; }

table { width: 100%; border-collapse: collapse; }
th, td { padding: var(--cf-3) var(--cf-4); border: 1px solid var(--cf-border); text-align: left; }
th { background: var(--cf-bg-2); font-weight: 600; }

/* ── 3. Layout ────────────────────────────────────────────── */
.cf-container {
  max-width: var(--cf-container);
  margin-inline: auto;
  padding-inline: clamp(1rem, 5vw, 2.5rem);
}
.cf-container--sm { max-width: var(--cf-container-sm); }
.cf-container--md { max-width: var(--cf-container-md); }

.cf-row { display: flex; flex-wrap: wrap; gap: var(--cf-6); }
.cf-col { flex: 1 1 0; min-width: 0; }

.cf-grid { display: grid; gap: var(--cf-6); }
.cf-grid--2 { grid-template-columns: repeat(auto-fill, minmax(min(100%,480px),1fr)); }
.cf-grid--3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 900px) { .cf-grid--3 { grid-template-columns: repeat(2, 1fr); } }
.cf-grid--4 { grid-template-columns: repeat(auto-fill, minmax(min(100%,240px),1fr)); }

.cf-section {
  padding-block: clamp(3rem, 8vw, 6rem);
}
.cf-section--sm { padding-block: clamp(1.25rem, 5vw, 4rem); }
.cf-section--lg { padding-block: clamp(4rem, 10vw, 8rem); }

/* Sticky site header offset */
body.cf-has-sticky-header { scroll-padding-top: var(--cf-header-h); }

/* ── 4. Header ────────────────────────────────────────────── */
.cf-header {
  position: relative;
  z-index: 1000;
  background: var(--cf-bg);
  border-bottom: 1px solid var(--cf-border);
  transition: var(--cf-t);
}
.cf-header--sticky {
  position: sticky;
  top: 0;
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  background: rgba(255,255,255,.85);
}
[data-theme="dark"] .cf-header--sticky,
.dark-mode .cf-header--sticky {
  background: rgba(15,23,42,.85);
}
.cf-header--transparent {
  position: absolute;
  top: 0; left: 0; right: 0;
  background: transparent;
  border-bottom-color: transparent;
}
.cf-header__inner {
  display: flex;
  align-items: center;
  gap: var(--cf-6);
  height: var(--cf-header-h);
}
.cf-header__logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: var(--cf-3);
}
.cf-header__logo img { height: 40px; width: auto; }
.cf-header__site-title {
  font-family: var(--cf-font-display);
  font-size: var(--cf-text-xl);
  font-weight: 800;
  color: var(--cf-text);
  letter-spacing: -0.02em;
}
.cf-header__nav { flex: 1; }
.cf-header__actions {
  display: flex;
  align-items: center;
  gap: var(--cf-3);
  flex-shrink: 0;
}

/* ── Primary nav ── */
.cf-nav__list {
  display: flex;
  align-items: center;
  gap: var(--cf-1);
  list-style: none;
  padding: 0; margin: 0;
}
.cf-nav__item { position: relative; }
.cf-nav__link {
  display: flex;
  align-items: center;
  gap: var(--cf-1);
  padding: var(--cf-2) var(--cf-3);
  font-weight: 500;
  font-size: var(--cf-text-sm);
  color: var(--cf-text);
  border-radius: var(--cf-r-sm);
  white-space: nowrap;
}
.cf-nav__link:hover { color: var(--cf-primary); background: var(--cf-primary-50); }
.cf-nav__item--current > .cf-nav__link,
.cf-nav__item--active  > .cf-nav__link { color: var(--cf-primary); }

/* Dropdown */
.cf-nav__dropdown {
  position: absolute;
  top: calc(100% + var(--cf-2));
  left: 0;
  min-width: 220px;
  background: var(--cf-surface);
  border: 1px solid var(--cf-border);
  border-radius: var(--cf-r-lg);
  box-shadow: var(--cf-shadow-xl);
  list-style: none;
  padding: var(--cf-2);
  margin: 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: var(--cf-t-fast);
  z-index: 200;
}
.cf-nav__item:hover > .cf-nav__dropdown,
.cf-nav__item:focus-within > .cf-nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.cf-nav__dropdown-link {
  display: block;
  padding: var(--cf-2) var(--cf-3);
  font-size: var(--cf-text-sm);
  color: var(--cf-text);
  border-radius: var(--cf-r-sm);
}
.cf-nav__dropdown-link:hover { background: var(--cf-bg-2); color: var(--cf-primary); }

/* Mobile hamburger */
.cf-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--cf-2);
  color: var(--cf-text);
  border-radius: var(--cf-r-sm);
  flex-shrink: 0;
}
.cf-nav-toggle:hover { background: var(--cf-bg-2); }

/* ── Mobile header (hidden on desktop) ── */
.cf-mob-header { display: none; }

@media (max-width: 1024px) {
  /* Hide desktop header, show mobile header */
  .cf-header { display: none !important; }

  .cf-mob-header {
    display: block;
    position: sticky;
    top: 0;
    z-index: 200;
    margin: 10px 14px 0;
    border-radius: 16px;
    border: 1px solid rgba(0,0,0,.12);
    box-shadow: 0 4px 16px rgba(0,0,0,.10);
    background: rgba(255,255,255,.95);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
  }
  [data-theme="dark"] .cf-mob-header,
  .dark-mode .cf-mob-header {
    background: rgba(24,24,27,.95);
    border-color: rgba(255,255,255,.1);
  }

  .cf-mob-header__bar {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    min-height: 56px;
  }

  /* Hamburger button */
  .cf-mob-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    background: none;
    border: 1px solid var(--cf-border);
    border-radius: var(--cf-r-sm);
    cursor: pointer;
    padding: 8px;
    flex-shrink: 0;
  }
  .cf-mob-toggle span {
    display: block;
    height: 2px;
    background: var(--cf-text);
    border-radius: 2px;
    transition: transform .2s, opacity .2s;
  }
  .cf-mob-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .cf-mob-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .cf-mob-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  /* Logo — centered in its grid column */
  .cf-mob-header__logo { display:flex; flex-direction:column; align-items:center; justify-content:center; text-align:center; }
  .cf-mob-header__logo img { height: 36px; width: auto; }
  .cf-mob-header__tagline { font-size: .75rem; color: var(--cf-text-muted); margin-top: 2px; }

  /* Mobile nav dropdown — floating card */
  .cf-mob-nav {
    display: none;
    position: absolute;
    top: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    background: var(--cf-surface, #fff);
    border: 1px solid var(--cf-border);
    border-radius: 14px;
    box-shadow: 0 8px 28px rgba(0,0,0,.13);
    padding: 8px 0 4px;
    overflow: hidden;
    z-index: 300;
  }
  .cf-mob-nav.is-open { display: block; }

  /* Nav links inside mobile dropdown */
  .cf-mob-nav .cf-nav__list {
    display: flex;
    flex-direction: column;
    list-style: none;
    margin: 0; padding: 0;
  }
  .cf-mob-nav .cf-nav__list a {
    display: block;
    padding: 12px 20px;
    font-size: .95rem;
    font-weight: 600;
    color: var(--cf-text);
    text-decoration: none;
  }
  .cf-mob-nav .cf-nav__list a:hover { background: var(--cf-bg-2); color: var(--cf-primary); }

  /* CTA buttons inside mobile dropdown */
  .cf-mob-ctas {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 12px 16px 16px;
    border-top: 1px solid var(--cf-border);
    margin-top: 4px;
  }
  .cf-mob-ctas .cf-btn { width: 100%; justify-content: center; }
}

/* ── Legacy desktop mobile nav (≤1024px) kept for fallback ── */
@media (max-width: 1024px) {
  .cf-nav-toggle { display: flex; align-items: center; justify-content: center; }
  .cf-header__nav {
    display: none;
    position: absolute;
    top: var(--cf-header-h);
    left: 0; right: 0;
    background: var(--cf-surface);
    border-bottom: 1px solid var(--cf-border);
    box-shadow: var(--cf-shadow-lg);
    padding: var(--cf-4);
    z-index: 999;
  }
  .cf-header__nav--open { display: block; }
  .cf-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .cf-nav__link { padding: var(--cf-3) var(--cf-4); font-size: var(--cf-text-base); }
  .cf-nav__dropdown { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: none; background: var(--cf-bg-2); margin-top: var(--cf-1); }
}

/* ── 5. Hero ──────────────────────────────────────────────── */
.cf-hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--cf-bg);
}
.cf-hero--gradient {
  background: linear-gradient(135deg, var(--cf-900) 0%, #1e1b4b 50%, #312e81 100%);
  color: #fff;
}
.cf-hero--gradient .cf-hero__kicker,
.cf-hero--gradient p { color: rgba(255,255,255,.8); }
.cf-hero--gradient h1 { color: #fff; }

.cf-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.cf-hero__bg img, .cf-hero__bg video {
  width: 100%; height: 100%;
  object-fit: cover;
}
.cf-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,23,42,.85) 0%, rgba(79,70,229,.6) 100%);
}
.cf-hero__content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}
.cf-hero--centered .cf-hero__content { margin-inline: auto; text-align: center; }

.cf-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: var(--cf-2);
  font-size: var(--cf-text-sm);
  font-weight: 600;
  letter-spacing: var(--cf-tracking-wide);
  text-transform: uppercase;
  color: var(--cf-primary-light);
  margin-bottom: var(--cf-4);
}
.cf-hero__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: var(--cf-6);
}
.cf-hero__title .cf-highlight {
  background: linear-gradient(135deg, var(--cf-primary-light), var(--cf-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.cf-hero__desc {
  font-size: clamp(1rem, 2vw, var(--cf-text-lg));
  line-height: var(--cf-leading-loose);
  margin-bottom: var(--cf-8);
}
.cf-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--cf-4);
  align-items: center;
}
.cf-hero--centered .cf-hero__actions { justify-content: center; }

/* Floating stats strip */
.cf-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--cf-6);
  margin-top: var(--cf-10);
  padding-top: var(--cf-8);
  border-top: 1px solid rgba(255,255,255,.2);
}
.cf-hero__stat-value {
  font-family: var(--cf-font-display);
  font-size: var(--cf-text-3xl);
  font-weight: 800;
  color: #fff;
}
.cf-hero__stat-label { font-size: var(--cf-text-sm); color: rgba(255,255,255,.7); }

/* Mesh gradient blobs */
.cf-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  pointer-events: none;
}
.cf-blob--1 { width: 600px; height: 600px; background: var(--cf-primary); top: -200px; right: -200px; animation: cf-float 8s ease-in-out infinite; }
.cf-blob--2 { width: 400px; height: 400px; background: var(--cf-accent); bottom: -100px; left: -100px; animation: cf-float 10s ease-in-out infinite reverse; }

@keyframes cf-float {
  0%, 100% { transform: translate(0,0) scale(1); }
  33%  { transform: translate(30px,-20px) scale(1.05); }
  66%  { transform: translate(-20px,30px) scale(0.95); }
}

/* ── 6. Buttons ───────────────────────────────────────────── */
.cf-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--cf-2);
  padding: 0.75em 1.75em;
  font-family: var(--cf-font-sans);
  font-size: var(--cf-text-sm);
  font-weight: 600;
  line-height: 1;
  border-radius: var(--cf-r-full);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: var(--cf-t-fast);
  position: relative;
  overflow: hidden;
}
.cf-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: var(--cf-t-fast);
}
.cf-btn:hover::after { background: rgba(255,255,255,.08); }
.cf-btn:active { transform: scale(0.98); }

.cf-btn--primary {
  background: var(--cf-primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(99,102,241,.4);
}
.cf-btn--primary:hover {
  background: var(--cf-primary-dark);
  box-shadow: 0 6px 20px rgba(99,102,241,.5);
  color: #fff;
}
.cf-btn--accent {
  background: var(--cf-accent);
  color: var(--cf-900);
  box-shadow: 0 4px 14px rgba(245,158,11,.4);
}
.cf-btn--accent:hover { background: var(--cf-accent-dark); color: var(--cf-900); }
.cf-btn--outline {
  background: transparent;
  border-color: var(--cf-border);
  color: var(--cf-text);
}
.cf-btn--outline:hover { border-color: var(--cf-primary); color: var(--cf-primary); background: var(--cf-primary-50); }
.cf-btn--ghost { background: transparent; color: var(--cf-text); }
.cf-btn--ghost:hover { background: var(--cf-bg-2); }
.cf-btn--white {
  background: #fff;
  color: var(--cf-primary-dark);
}
.cf-btn--white:hover { background: var(--cf-primary-50); }
.cf-btn--sm { padding: 0.55em 1.2em; font-size: var(--cf-text-xs); }
.cf-btn--lg { padding: 1em 2.5em; font-size: var(--cf-text-base); }
.cf-btn--xl { padding: 1.1em 3em; font-size: var(--cf-text-lg); }
.cf-btn--icon { width: 2.5rem; height: 2.5rem; padding: 0; border-radius: var(--cf-r-full); }
.cf-btn[disabled], .cf-btn--disabled { opacity: .5; pointer-events: none; }
.cf-btn--loading { pointer-events: none; }
.cf-btn--loading::before {
  content: '';
  width: 1em; height: 1em;
  border: 2px solid rgba(255,255,255,.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: cf-spin .6s linear infinite;
  margin-right: var(--cf-2);
}

/* ── 7. Cards ─────────────────────────────────────────────── */
.cf-card {
  background: var(--cf-surface);
  border: 1px solid var(--cf-border);
  border-radius: var(--cf-r-xl);
  overflow: hidden;
  transition: var(--cf-t);
  position: relative;
}
.cf-card--hover:hover {
  transform: translateY(-4px);
  box-shadow: var(--cf-shadow-xl);
  border-color: var(--cf-primary-100);
}
.cf-card__media { position: relative; overflow: hidden; aspect-ratio: 16/9; }
.cf-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s var(--cf-ease); }
.cf-card--hover:hover .cf-card__media img { transform: scale(1.04); }
.cf-card__body { padding: var(--cf-5); }
.cf-card__footer { padding: var(--cf-4) var(--cf-5); border-top: 1px solid var(--cf-border); }
.cf-card__badge {
  position: absolute;
  top: var(--cf-3);
  left: var(--cf-3);
  z-index: 2;
}
.cf-card__price {
  font-family: var(--cf-font-display);
  font-size: var(--cf-text-2xl);
  font-weight: 800;
  color: var(--cf-primary);
}
.cf-card__price-original {
  font-size: var(--cf-text-sm);
  color: var(--cf-text-faint);
  text-decoration: line-through;
}

/* Glass card */
.cf-card--glass {
  background: var(--cf-glass-bg);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border-color: var(--cf-glass-border);
}

/* ── 8. Course Card ───────────────────────────────────────── */
.cf-course-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}
.cf-course-card .cf-card__body { flex: 1; }

.cf-course-card__category {
  font-size: var(--cf-text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--cf-tracking-wide);
  color: var(--cf-primary);
  margin-bottom: var(--cf-2);
}
.cf-course-card__title {
  font-size: var(--cf-text-lg);
  font-weight: 700;
  margin-bottom: var(--cf-3);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.cf-course-card__excerpt {
  font-size: var(--cf-text-sm);
  color: var(--cf-text-muted);
  margin-bottom: var(--cf-4);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.cf-course-card__instructor {
  display: flex;
  align-items: center;
  gap: var(--cf-2);
  margin-bottom: var(--cf-4);
}
.cf-course-card__avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  object-fit: cover;
}
.cf-course-card__instructor-name { font-size: var(--cf-text-xs); font-weight: 600; color: var(--cf-text-muted); }

.cf-course-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--cf-4);
  list-style: none;
  padding: 0; margin: 0;
  font-size: var(--cf-text-xs);
  color: var(--cf-text-muted);
}
.cf-course-meta li { display: flex; align-items: center; gap: var(--cf-1); }

/* Rating */
.cf-stars { display: inline-flex; gap: 2px; }
.cf-star { color: var(--cf-accent); font-size: 14px; }
.cf-star--empty { color: var(--cf-300); }
.cf-star--half { position: relative; color: var(--cf-300); }
.cf-star--half::after { content: '★'; position: absolute; left: 0; width: 50%; overflow: hidden; color: var(--cf-accent); }

/* Progress bar */
.cf-progress {
  height: 6px;
  background: var(--cf-bg-3);
  border-radius: var(--cf-r-full);
  overflow: hidden;
}
.cf-progress__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--cf-primary), var(--cf-accent));
  border-radius: var(--cf-r-full);
  transition: width 0.6s var(--cf-ease-out);
}

/* ── 9. Badges ────────────────────────────────────────────── */
.cf-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--cf-1);
  padding: 0.25em 0.75em;
  font-size: var(--cf-text-xs);
  font-weight: 600;
  border-radius: var(--cf-r-full);
  white-space: nowrap;
}
.cf-badge--primary   { background: var(--cf-primary-100); color: var(--cf-primary-dark); }
.cf-badge--accent    { background: #fef3c7; color: #92400e; }
.cf-badge--success   { background: #d1fae5; color: #065f46; }
.cf-badge--error     { background: #fee2e2; color: #991b1b; }
.cf-badge--beginner  { background: #d1fae5; color: #065f46; }
.cf-badge--intermediate { background: #fef3c7; color: #92400e; }
.cf-badge--advanced  { background: #fee2e2; color: #991b1b; }
.cf-badge--all-levels{ background: var(--cf-primary-100); color: var(--cf-primary-dark); }
.cf-badge--new       { background: linear-gradient(135deg, var(--cf-primary), var(--cf-accent)); color: #fff; }
.cf-badge--sale      { background: var(--cf-error); color: #fff; }
.cf-badge--free      { background: var(--cf-success); color: #fff; }

/* ── 10. Section Headers ──────────────────────────────────── */
.cf-section-header { margin-bottom: var(--cf-12); }
.cf-section-header--center { text-align: center; max-width: 640px; margin-inline: auto; margin-bottom: var(--cf-12); }
.cf-section-kicker {
  display: inline-flex;
  align-items: center;
  gap: var(--cf-2);
  font-size: var(--cf-text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--cf-primary);
  margin-bottom: var(--cf-3);
}
.cf-section-kicker::before {
  content: '';
  width: 24px; height: 2px;
  background: var(--cf-primary);
}
.cf-section-title { margin-bottom: var(--cf-4); }
.cf-section-desc { font-size: var(--cf-text-lg); color: var(--cf-text-muted); max-width: 560px; }
.cf-section-header--center .cf-section-desc { margin-inline: auto; }

/* ── Page / Archive Hero Banner ─────────────────────────── */
.cf-page-hero {
  padding: 2.25rem 0 2rem;
  text-align: center;
  background: linear-gradient(135deg, color-mix(in srgb, var(--cf-primary) 8%, var(--cf-bg)), var(--cf-bg-2));
  border-bottom: 1px solid var(--cf-border);
}
.cf-page-hero .cf-breadcrumbs { justify-content: center; margin-bottom: .6rem; }
.cf-page__title,
.cf-page-hero .cf-section-title {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 800;
  margin-bottom: .25rem;
}
.cf-page-hero .cf-section-desc {
  margin-inline: auto;
  margin-top: .5rem;
}

/* ── 11. Stats Block ──────────────────────────────────────── */
.cf-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--cf-6);
}
.cf-stat-item { text-align: center; padding: var(--cf-6); }
.cf-stat-value {
  font-family: var(--cf-font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--cf-primary), var(--cf-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: var(--cf-2);
}
.cf-stat-label { font-size: var(--cf-text-sm); color: var(--cf-text-muted); font-weight: 500; }

/* ── 12. Instructor Card ──────────────────────────────────── */
.cf-instructor-card { text-align: center; }
.cf-instructor-card__avatar {
  width: 88px; height: 88px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto var(--cf-4);
  border: 3px solid var(--cf-primary-100);
  box-shadow: var(--cf-shadow-glow);
}
.cf-instructor-card__name { font-size: var(--cf-text-lg); font-weight: 700; margin-bottom: var(--cf-1); }
.cf-instructor-card__title { font-size: var(--cf-text-sm); color: var(--cf-text-muted); margin-bottom: var(--cf-3); }
.cf-instructor-card__stats {
  display: flex;
  justify-content: center;
  gap: var(--cf-5);
  font-size: var(--cf-text-xs);
  color: var(--cf-text-muted);
}

/* ── 13. Testimonials ─────────────────────────────────────── */
.cf-testimonial {
  padding: var(--cf-6);
  position: relative;
}
.cf-testimonial::before {
  content: '\201C';
  position: absolute;
  top: var(--cf-4);
  left: var(--cf-5);
  font-size: 4rem;
  line-height: 1;
  color: var(--cf-primary);
  opacity: 0.3;
  font-family: Georgia, serif;
}
.cf-testimonial__text {
  font-size: var(--cf-text-base);
  line-height: var(--cf-leading-loose);
  color: var(--cf-text);
  margin-bottom: var(--cf-5);
  padding-top: var(--cf-6);
}
.cf-testimonial__author {
  display: flex;
  align-items: center;
  gap: var(--cf-3);
}
.cf-testimonial__avatar { width: 44px; height: 44px; border-radius: 50%; object-fit: cover; }
.cf-testimonial__name { font-weight: 700; font-size: var(--cf-text-sm); }
.cf-testimonial__role { font-size: var(--cf-text-xs); color: var(--cf-text-muted); }

/* ── 14. Pricing Table ────────────────────────────────────── */
.cf-pricing-card { position: relative; }
.cf-pricing-card--featured {
  border-color: var(--cf-primary);
  box-shadow: var(--cf-shadow-glow);
  transform: scale(1.03);
}
.cf-pricing-card--featured::before {
  content: attr(data-label);
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--cf-primary), var(--cf-accent));
  color: #fff;
  font-size: var(--cf-text-xs);
  font-weight: 700;
  padding: 0.3em 1em;
  border-radius: var(--cf-r-full);
  white-space: nowrap;
}
.cf-pricing-card__header { padding: var(--cf-6); border-bottom: 1px solid var(--cf-border); }
.cf-pricing-card__name { font-size: var(--cf-text-lg); font-weight: 700; margin-bottom: var(--cf-2); }
.cf-pricing-card__price { font-family: var(--cf-font-display); margin-bottom: var(--cf-1); }
.cf-pricing-card__amount {
  font-size: 3rem;
  font-weight: 800;
  color: var(--cf-primary);
  line-height: 1;
}
.cf-pricing-card__currency { font-size: var(--cf-text-xl); vertical-align: top; margin-top: 0.6rem; display: inline-block; }
.cf-pricing-card__period { font-size: var(--cf-text-sm); color: var(--cf-text-muted); }
.cf-pricing-card__features { padding: var(--cf-6); list-style: none; margin: 0; }
.cf-pricing-card__features li {
  display: flex;
  align-items: flex-start;
  gap: var(--cf-3);
  padding: var(--cf-2) 0;
  font-size: var(--cf-text-sm);
  color: var(--cf-text-muted);
  border-bottom: 1px solid var(--cf-border);
}
.cf-pricing-card__features li:last-child { border-bottom: none; }
.cf-pricing-card__features li svg { flex-shrink: 0; color: var(--cf-success); }
.cf-pricing-card__cta { padding: 0 var(--cf-6) var(--cf-6); }
.cf-pricing-card__cta .cf-btn { width: 100%; }

/* ── 15. Tabs ─────────────────────────────────────────────── */
.cf-tabs__nav {
  display: flex;
  gap: var(--cf-1);
  border-bottom: 2px solid var(--cf-border);
  margin-bottom: var(--cf-8);
  overflow-x: auto;
  scrollbar-width: none;
}
.cf-tabs__nav::-webkit-scrollbar { display: none; }
.cf-tabs__btn {
  padding: var(--cf-3) var(--cf-5);
  font-weight: 600;
  font-size: var(--cf-text-sm);
  color: var(--cf-text-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--cf-t-fast);
}
.cf-tabs__btn:hover { color: var(--cf-primary); }
.cf-tabs__btn--active { color: var(--cf-primary); border-bottom-color: var(--cf-primary); }
.cf-tabs__panel { display: none; }
.cf-tabs__panel--active { display: block; }

/* ── 16. Accordion / FAQ ──────────────────────────────────── */
.cf-accordion { border: 1px solid var(--cf-border); border-radius: var(--cf-r-lg); overflow: hidden; }
.cf-accordion__item { border-bottom: 1px solid var(--cf-border); }
.cf-accordion__item:last-child { border-bottom: none; }
.cf-accordion__trigger {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--cf-5) var(--cf-6);
  background: none;
  border: none;
  cursor: pointer;
  font-weight: 600;
  font-size: var(--cf-text-base);
  color: var(--cf-text);
  text-align: left;
  gap: var(--cf-4);
  transition: var(--cf-t-fast);
}
.cf-accordion__trigger:hover { background: var(--cf-bg-2); color: var(--cf-primary); }
.cf-accordion__icon { flex-shrink: 0; transition: transform .25s var(--cf-ease); }
.cf-accordion__item--open .cf-accordion__icon { transform: rotate(45deg); }
.cf-accordion__body {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s var(--cf-ease);
}
.cf-accordion__item--open .cf-accordion__body { max-height: 1000px; }
.cf-accordion__content { padding: 0 var(--cf-6) var(--cf-5); color: var(--cf-text-muted); line-height: var(--cf-leading-loose); }

/* ── 17. Forms ────────────────────────────────────────────── */
.cf-field { margin-bottom: var(--cf-5); }
.cf-label { display: block; font-weight: 600; font-size: var(--cf-text-sm); margin-bottom: var(--cf-2); color: var(--cf-text); }
.cf-input, .cf-select, .cf-textarea {
  display: block;
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--cf-font-sans);
  font-size: var(--cf-text-sm);
  color: var(--cf-text);
  background: var(--cf-bg);
  border: 1.5px solid var(--cf-border);
  border-radius: var(--cf-r-md);
  transition: var(--cf-t-fast);
  outline: none;
}
.cf-input:focus, .cf-select:focus, .cf-textarea:focus {
  border-color: var(--cf-primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,.15);
}
.cf-input::placeholder, .cf-textarea::placeholder { color: var(--cf-text-faint); }
.cf-textarea { min-height: 120px; resize: vertical; }
.cf-field--error .cf-input,
.cf-field--error .cf-select { border-color: var(--cf-error); }
.cf-field-hint { font-size: var(--cf-text-xs); color: var(--cf-text-muted); margin-top: var(--cf-1); }
.cf-field-error { font-size: var(--cf-text-xs); color: var(--cf-error); margin-top: var(--cf-1); }

/* Search form */
.cf-search-form {
  position: relative;
  max-width: 480px;
}
.cf-search-form__input {
  width: 100%;
  padding: 0.875rem 1rem 0.875rem 3rem;
  border-radius: var(--cf-r-full);
  border: 1.5px solid var(--cf-border);
  background: var(--cf-bg);
  font-size: var(--cf-text-sm);
  color: var(--cf-text);
  outline: none;
  transition: var(--cf-t-fast);
}
.cf-search-form__input:focus { border-color: var(--cf-primary); box-shadow: 0 0 0 3px rgba(99,102,241,.15); }
.cf-search-form__btn {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--cf-primary);
  color: #fff;
  border: none;
  cursor: pointer;
  width: 36px; height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--cf-t-fast);
}
.cf-search-form__btn:hover { background: var(--cf-primary-dark); }

/* ── 18. Sidebar & Layout ─────────────────────────────────── */
.cf-layout { display: grid; gap: var(--cf-8); }
.cf-layout--sidebar { grid-template-columns: 1fr var(--cf-sidebar-w); }
.cf-layout--sidebar-left { grid-template-columns: var(--cf-sidebar-w) 1fr; }
.cf-layout--full { grid-template-columns: 1fr; }

.cf-sidebar { min-width: 0; }
.cf-main-content { min-width: 0; }

@media (max-width: 1024px) {
  .cf-layout--sidebar,
  .cf-layout--sidebar-left { grid-template-columns: 1fr; }
  .cf-sidebar { order: 2; }
}

/* Widget */
.cf-widget { margin-bottom: var(--cf-8); }
.cf-widget__title { font-size: var(--cf-text-base); font-weight: 700; margin-bottom: var(--cf-4); padding-bottom: var(--cf-3); border-bottom: 2px solid var(--cf-primary); }

/* ── 19. Footer ───────────────────────────────────────────── */
.cf-footer {
  background: var(--cf-900);
  color: rgba(255,255,255,.7);
  padding-top: var(--cf-16);
}
.cf-footer__grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--cf-8);
  margin-bottom: var(--cf-12);
}
.cf-footer__brand { max-width: 300px; }
.cf-footer__logo { height: 40px; margin-bottom: var(--cf-4); }
.cf-footer__tagline { font-size: var(--cf-text-sm); line-height: 1.7; }
.cf-footer__col-title { font-size: var(--cf-text-sm); font-weight: 700; color: #fff; margin-bottom: var(--cf-4); text-transform: uppercase; letter-spacing: 0.08em; }
.cf-footer__links { list-style: none; padding: 0; margin: 0; }
.cf-footer__links li { margin-bottom: var(--cf-3); }
.cf-footer__links a { font-size: var(--cf-text-sm); color: rgba(255,255,255,.6); transition: var(--cf-t-fast); }
.cf-footer__links a:hover { color: #fff; }
.cf-footer__bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: var(--cf-6) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--cf-4);
  font-size: var(--cf-text-xs);
}
.cf-footer__social { display: flex; gap: var(--cf-3); }
.cf-footer__social a { color: rgba(255,255,255,.5); transition: var(--cf-t-fast); font-size: 18px; }
.cf-footer__social a:hover { color: #fff; }

@media (max-width: 768px) {
  .cf-footer__grid { grid-template-columns: 1fr 1fr; }
  .cf-footer__brand { grid-column: 1 / -1; }
}
@media (max-width: 480px) {
  .cf-footer__grid { grid-template-columns: 1fr; }
}

/* ── 20. Dark Mode Toggle ─────────────────────────────────── */
.cf-dark-toggle {
  background: none;
  border: 1.5px solid var(--cf-border);
  border-radius: var(--cf-r-full);
  cursor: pointer;
  width: 40px; height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cf-text);
  transition: var(--cf-t-fast);
  position: relative;
}
.cf-dark-toggle:hover { border-color: var(--cf-primary); color: var(--cf-primary); }
.cf-dark-toggle__moon { display: none; }
[data-theme="dark"] .cf-dark-toggle__sun,
.dark-mode .cf-dark-toggle__sun { display: none; }
[data-theme="dark"] .cf-dark-toggle__moon,
.dark-mode .cf-dark-toggle__moon { display: block; }

/* ── 21. Breadcrumbs ──────────────────────────────────────── */
.cf-breadcrumbs { margin-bottom: var(--cf-6); }
.cf-breadcrumbs__list { display: flex; flex-wrap: wrap; align-items: center; gap: var(--cf-2); list-style: none; padding: 0; margin: 0; }
.cf-breadcrumbs__list li { font-size: var(--cf-text-sm); color: var(--cf-text-muted); }
.cf-breadcrumbs__list li + li::before { content: '/'; margin-right: var(--cf-2); color: var(--cf-text-faint); }
.cf-breadcrumbs__list a { color: var(--cf-text-muted); }
.cf-breadcrumbs__list a:hover { color: var(--cf-primary); }

/* ── 22. Share Bar ────────────────────────────────────────── */
.cf-share-bar { display: flex; align-items: center; gap: var(--cf-3); flex-wrap: wrap; margin-top: var(--cf-8); padding-top: var(--cf-6); border-top: 1px solid var(--cf-border); }
.cf-share-bar__label { font-weight: 600; font-size: var(--cf-text-sm); }
.cf-share-bar__link { padding: 0.4em 1em; border-radius: var(--cf-r-full); font-size: var(--cf-text-xs); font-weight: 600; background: var(--cf-bg-2); color: var(--cf-text); border: 1px solid var(--cf-border); transition: var(--cf-t-fast); }
.cf-share-bar__link:hover { background: var(--cf-primary); color: #fff; border-color: var(--cf-primary); }

/* ── 23. Pagination ───────────────────────────────────────── */
.cf-pagination { margin-top: var(--cf-12); display: flex; justify-content: center; }
.cf-pagination .page-numbers {
  display: flex;
  list-style: none;
  gap: var(--cf-2);
  flex-wrap: wrap;
  justify-content: center;
  padding: 0; margin: 0;
}
.cf-pagination .page-numbers li a,
.cf-pagination .page-numbers li span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--cf-3);
  border-radius: var(--cf-r-md);
  font-size: var(--cf-text-sm);
  font-weight: 600;
  border: 1.5px solid var(--cf-border);
  color: var(--cf-text);
  background: var(--cf-surface);
  transition: var(--cf-t-fast);
}
.cf-pagination .page-numbers li a:hover { border-color: var(--cf-primary); color: var(--cf-primary); }
.cf-pagination .page-numbers li .current { background: var(--cf-primary); border-color: var(--cf-primary); color: #fff; }

/* ── 24. Utility Classes ──────────────────────────────────── */
.cf-text-gradient {
  background: linear-gradient(135deg, var(--cf-primary-light), var(--cf-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.cf-rounded   { border-radius: var(--cf-r-full); }
.cf-shadow-glow { box-shadow: var(--cf-shadow-glow); }
.cf-sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
.cf-visually-hidden { @extend .cf-sr-only; }

/* ── 25. Animations ───────────────────────────────────────── */
@keyframes cf-spin { to { transform: rotate(360deg); } }
@keyframes cf-pulse { 0%,100% { opacity: 1; } 50% { opacity: .5; } }
@keyframes cf-fade-up {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes cf-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes cf-scale-in {
  from { opacity: 0; transform: scale(.95); }
  to   { opacity: 1; transform: scale(1); }
}

.cf-animate-fade-up  { animation: cf-fade-up  .5s var(--cf-ease-out) both; }
.cf-animate-fade-in  { animation: cf-fade-in  .4s var(--cf-ease-out) both; }
.cf-animate-scale-in { animation: cf-scale-in .3s var(--cf-ease-spring) both; }

/* JS-driven entrance */
[data-cf-animate] { opacity: 0; transform: translateY(24px); transition: opacity .5s var(--cf-ease), transform .5s var(--cf-ease); }
[data-cf-animate].cf-visible { opacity: 1; transform: none; }
[data-cf-animate][data-delay="100"] { transition-delay: .1s; }
[data-cf-animate][data-delay="200"] { transition-delay: .2s; }
[data-cf-animate][data-delay="300"] { transition-delay: .3s; }
[data-cf-animate][data-delay="400"] { transition-delay: .4s; }

/* ── 26. Skip link ────────────────────────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--cf-primary);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: 0 0 var(--cf-r-md) var(--cf-r-md);
  font-weight: 600;
  z-index: 9999;
}
.skip-link:focus { top: 0; }

/* ── 27. Notices / Alerts ─────────────────────────────────── */
.cf-notice {
  display: flex;
  align-items: flex-start;
  gap: var(--cf-3);
  padding: var(--cf-4) var(--cf-5);
  border-radius: var(--cf-r-lg);
  font-size: var(--cf-text-sm);
  margin-bottom: var(--cf-5);
}
.cf-notice--info    { background: #eff6ff; border: 1px solid #bfdbfe; color: #1e40af; }
.cf-notice--success { background: #f0fdf4; border: 1px solid #bbf7d0; color: #166534; }
.cf-notice--warning { background: #fffbeb; border: 1px solid #fde68a; color: #92400e; }
.cf-notice--error   { background: #fef2f2; border: 1px solid #fecaca; color: #991b1b; }

/* ── 28. Loading skeleton ─────────────────────────────────── */
.cf-skeleton {
  background: linear-gradient(90deg, var(--cf-bg-2) 25%, var(--cf-bg-3) 50%, var(--cf-bg-2) 75%);
  background-size: 200% 100%;
  animation: cf-skeleton-loading 1.5s infinite;
  border-radius: var(--cf-r-md);
}
@keyframes cf-skeleton-loading {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ── 29. Back to top ──────────────────────────────────────── */
.cf-back-to-top {
  position: fixed;
  bottom: var(--cf-6);
  right: var(--cf-6);
  width: 44px; height: 44px;
  background: var(--cf-primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--cf-shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: var(--cf-t);
  z-index: 500;
}
.cf-back-to-top--visible { opacity: 1; visibility: visible; transform: none; }
.cf-back-to-top:hover { background: var(--cf-primary-dark); transform: translateY(-2px); }

/* ── 29b. Video Overlay ───────────────────────────────────── */
.cf-video-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.85);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity .3s var(--cf-ease);
  padding: var(--cf-6);
}
.cf-video-overlay--active { opacity: 1; }
.cf-video-modal {
  position: relative;
  width: 100%;
  max-width: 900px;
  background: #000;
  border-radius: var(--cf-r-xl);
  overflow: hidden;
  transform: scale(.95);
  transition: transform .3s var(--cf-ease-spring);
}
.cf-video-overlay--active .cf-video-modal { transform: scale(1); }
.cf-video-close {
  position: absolute;
  top: var(--cf-3);
  right: var(--cf-3);
  z-index: 10;
  background: rgba(255,255,255,.2);
  border: none;
  color: #fff;
  width: 36px; height: 36px;
  border-radius: 50%;
  font-size: 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--cf-t-fast);
}
.cf-video-close:hover { background: rgba(255,255,255,.35); }
.cf-video-wrap { position: relative; padding-bottom: 56.25%; }
.cf-video-wrap iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: none; }

/* ── 30. Responsive helpers ───────────────────────────────── */
@media (max-width: 768px) {
  .cf-hide-mobile { display: none !important; }
  .cf-grid--3, .cf-grid--4 { grid-template-columns: 1fr; }
  .cf-grid--2 { grid-template-columns: 1fr; }
  .cf-hero { min-height: 70vh; }
  .cf-pricing-card--featured { transform: none; }
  .cf-stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 769px) {
  .cf-hide-desktop { display: none !important; }
}
@media print {
  .cf-header, .cf-footer, .cf-back-to-top, .cf-dark-toggle { display: none !important; }
  body { color: #000; background: #fff; }
}