/* ============================================================
   K2BOX — Design System Global
   ============================================================ */

/* ─── Variables ─────────────────────────────────────────────── */
:root {
  /* Couleurs */
  --bg-base:       #080810;
  --bg-surface:    #0e0e1a;
  --bg-card:       #13131f;
  --bg-card-hover: #181828;
  --bg-input:      #0e0e1a;

  --primary:       #7c3aed;
  --primary-light: #9d5cff;
  --primary-dim:   rgba(124, 58, 237, 0.15);
  --primary-glow:  rgba(124, 58, 237, 0.4);

  --secondary:     #3b82f6;
  --secondary-dim: rgba(59, 130, 246, 0.15);

  --accent:        #a855f7;
  --accent-cyan:   #06b6d4;

  --text-primary:  #f1f5f9;
  --text-secondary:#94a3b8;
  --text-muted:    #475569;
  --text-dim:      #334155;

  --border:        rgba(255,255,255,0.07);
  --border-focus:  rgba(124, 58, 237, 0.6);
  --border-card:   rgba(255,255,255,0.05);

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

  /* Gradients */
  --grad-primary:  linear-gradient(135deg, #7c3aed, #3b82f6);
  --grad-hero:     radial-gradient(ellipse 80% 60% at 50% 0%, rgba(124,58,237,0.2) 0%, transparent 70%);
  --grad-card:     linear-gradient(135deg, rgba(124,58,237,0.08), rgba(59,130,246,0.05));
  --grad-glow:     radial-gradient(circle at center, rgba(124,58,237,0.3) 0%, transparent 70%);

  /* Typographie */
  --font-sans:     'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display:  'Inter', sans-serif;

  /* Espacements */
  --spacing-xs:    0.25rem;
  --spacing-sm:    0.5rem;
  --spacing-md:    1rem;
  --spacing-lg:    1.5rem;
  --spacing-xl:    2rem;
  --spacing-2xl:   3rem;
  --spacing-3xl:   5rem;
  --spacing-4xl:   8rem;

  /* Rayons */
  --radius-sm:     6px;
  --radius-md:     12px;
  --radius-lg:     16px;
  --radius-xl:     24px;
  --radius-full:   9999px;

  /* Ombres */
  --shadow-sm:     0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:     0 4px 20px rgba(0,0,0,0.5);
  --shadow-lg:     0 8px 40px rgba(0,0,0,0.6);
  --shadow-glow:   0 0 40px rgba(124,58,237,0.25);
  --shadow-card:   0 2px 20px rgba(0,0,0,0.4);

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;

  /* Header */
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a  { color: inherit; text-decoration: none; }
button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}
ul, ol { list-style: none; }

/* ─── Scrollbar ──────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-surface); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--primary-light); }

/* ─── Sélection ──────────────────────────────────────────────── */
::selection { background: var(--primary-dim); color: var(--text-primary); }

/* ─── Container ──────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

.container--wide { max-width: 1400px; }
.container--narrow { max-width: 800px; }

/* ─── Typographie ────────────────────────────────────────────── */
.text-xs     { font-size: 0.75rem; }
.text-sm     { font-size: 0.875rem; }
.text-base   { font-size: 1rem; }
.text-lg     { font-size: 1.125rem; }
.text-xl     { font-size: 1.25rem; }
.text-2xl    { font-size: 1.5rem; }
.text-3xl    { font-size: 1.875rem; }
.text-4xl    { font-size: 2.25rem; }
.text-5xl    { font-size: 3rem; }
.text-6xl    { font-size: 3.75rem; }

.font-medium  { font-weight: 500; }
.font-semibold{ font-weight: 600; }
.font-bold    { font-weight: 700; }
.font-black   { font-weight: 900; }

.text-primary   { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted     { color: var(--text-muted); }
.text-purple    { color: var(--primary-light); }
.text-blue      { color: var(--secondary); }
.text-gradient  {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.leading-tight  { line-height: 1.2; }
.leading-snug   { line-height: 1.35; }
.leading-relaxed{ line-height: 1.75; }

/* ─── Boutons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9375rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-base);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  text-align: center;
  justify-content: center;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.08);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn:hover::before { opacity: 1; }

.btn-primary {
  background: var(--grad-primary);
  color: #fff;
  box-shadow: 0 4px 20px rgba(124,58,237,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(124,58,237,0.5);
}
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border);
  backdrop-filter: blur(8px);
}
.btn-secondary:hover {
  border-color: rgba(124,58,237,0.5);
  background: var(--primary-dim);
  color: var(--primary-light);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}
.btn-ghost:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }

.btn-outline-primary {
  background: transparent;
  color: var(--primary-light);
  border-color: rgba(124,58,237,0.4);
}
.btn-outline-primary:hover {
  background: var(--primary-dim);
  border-color: var(--primary);
}

.btn-sm { padding: 0.5rem 1.25rem; font-size: 0.875rem; }
.btn-lg { padding: 1rem 2.25rem; font-size: 1.0625rem; }
.btn-xl { padding: 1.125rem 2.5rem; font-size: 1.125rem; border-radius: var(--radius-lg); }

.btn:disabled, .btn.loading {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ─── Badge ──────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.badge-primary {
  background: var(--primary-dim);
  color: var(--primary-light);
  border: 1px solid rgba(124,58,237,0.25);
}
.badge-success {
  background: rgba(16,185,129,0.1);
  color: var(--success);
  border: 1px solid rgba(16,185,129,0.2);
}
.badge-warning {
  background: rgba(245,158,11,0.1);
  color: var(--warning);
  border: 1px solid rgba(245,158,11,0.2);
}
.badge-secondary {
  background: var(--secondary-dim);
  color: var(--secondary);
  border: 1px solid rgba(59,130,246,0.2);
}

/* ─── Cards ──────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
}

.card-hover:hover {
  background: var(--bg-card-hover);
  border-color: rgba(124,58,237,0.2);
  box-shadow: var(--shadow-card);
  transform: translateY(-3px);
}

.card-gradient {
  background: var(--grad-card);
  border: 1px solid rgba(124,58,237,0.15);
}

/* ─── Section Titles ─────────────────────────────────────────── */
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary-light);
  margin-bottom: var(--spacing-md);
}

.section-eyebrow::before {
  content: '';
  width: 20px;
  height: 2px;
  background: var(--grad-primary);
  border-radius: 2px;
}

.section-title {
  font-size: clamp(1.875rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
}

.section-subtitle {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 560px;
}

.section-header { margin-bottom: var(--spacing-3xl); }
.section-header.center {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.section-header.center .section-subtitle { text-align: center; }

/* ─── Inputs ─────────────────────────────────────────────────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-lg);
}

.form-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-input {
  width: 100%;
  padding: 0.8125rem 1rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.9375rem;
  transition: all var(--transition-fast);
  outline: none;
}

.form-input::placeholder { color: var(--text-muted); }
.form-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.12);
}
.form-input:focus + .form-input-icon { color: var(--primary-light); }

.form-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}
.form-input-wrapper .form-input { padding-left: 2.75rem; }
.form-input-icon {
  position: absolute;
  left: 1rem;
  color: var(--text-muted);
  pointer-events: none;
  transition: color var(--transition-fast);
  width: 18px;
  height: 18px;
}

.form-input.error { border-color: var(--error); }
.form-error { font-size: 0.8125rem; color: var(--error); margin-top: 4px; }
.form-hint  { font-size: 0.8125rem; color: var(--text-muted); margin-top: 4px; }

textarea.form-input {
  resize: vertical;
  min-height: 120px;
  padding: 0.875rem 1rem;
}

select.form-input {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

/* ─── Header ─────────────────────────────────────────────────── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 100;
  transition: all var(--transition-base);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header.scrolled {
  background: rgba(8,8,16,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.375rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  flex-shrink: 0;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--grad-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 900;
  color: #fff;
  box-shadow: 0 4px 12px rgba(124,58,237,0.4);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.nav-link {
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
  color: var(--text-primary);
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: all var(--transition-base);
}

/* Mobile nav */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: rgba(8,8,16,0.98);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: var(--spacing-lg) var(--spacing-xl);
  flex-direction: column;
  gap: var(--spacing-xs);
  z-index: 99;
  animation: slideDown 200ms ease forwards;
}

.mobile-nav.open { display: flex; }

.mobile-nav-link {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

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

.mobile-nav-divider {
  height: 1px;
  background: var(--border);
  margin: var(--spacing-sm) 0;
}

/* ─── Hero ───────────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: var(--header-height);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-glow {
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(124,58,237,0.18) 0%, rgba(59,130,246,0.08) 40%, transparent 70%);
  filter: blur(40px);
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 20%, black 0%, transparent 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: var(--spacing-4xl) 0;
}

/* ─── Section Spacing ────────────────────────────────────────── */
.section {
  padding: var(--spacing-4xl) 0;
}

.section-sm { padding: var(--spacing-3xl) 0; }
.section-lg { padding: calc(var(--spacing-4xl) * 1.5) 0; }

/* ─── Divider ────────────────────────────────────────────────── */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

/* ─── Grid helpers ───────────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--spacing-xl); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-xl); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-xl); }

/* ─── Flex helpers ───────────────────────────────────────────── */
.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }
.flex-wrap { flex-wrap: wrap; }

/* ─── Feature Icon ───────────────────────────────────────────── */
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
  flex-shrink: 0;
}

.feature-icon-primary {
  background: var(--primary-dim);
  border: 1px solid rgba(124,58,237,0.2);
  color: var(--primary-light);
}

.feature-icon-secondary {
  background: var(--secondary-dim);
  border: 1px solid rgba(59,130,246,0.2);
  color: var(--secondary);
}

.feature-icon-cyan {
  background: rgba(6,182,212,0.1);
  border: 1px solid rgba(6,182,212,0.2);
  color: var(--accent-cyan);
}

/* ─── Dots / Lists ───────────────────────────────────────────── */
.check-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.check-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.check-item::before {
  content: '';
  width: 18px;
  height: 18px;
  background: var(--primary-dim);
  border: 1px solid rgba(124,58,237,0.3);
  border-radius: 50%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 24 24' fill='none' stroke='%239d5cff' stroke-width='3'%3E%3Cpath d='m5 12 5 5L20 7'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  flex-shrink: 0;
}

/* ─── Stats ──────────────────────────────────────────────────── */
.stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: var(--spacing-xs);
}

/* ─── Trust Bar ──────────────────────────────────────────────── */
.trust-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.trust-icon {
  width: 20px;
  height: 20px;
  color: var(--primary-light);
  flex-shrink: 0;
}

/* ─── Footer ─────────────────────────────────────────────────── */
.footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding: var(--spacing-4xl) 0 var(--spacing-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-3xl);
}

.footer-brand { display: flex; flex-direction: column; gap: var(--spacing-lg); }
.footer-brand-desc { color: var(--text-muted); font-size: 0.9375rem; line-height: 1.7; max-width: 280px; }

.footer-heading {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--spacing-lg);
}

.footer-links { display: flex; flex-direction: column; gap: var(--spacing-sm); }
.footer-link {
  font-size: 0.9375rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}
.footer-link:hover { color: var(--primary-light); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-copyright {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-legal {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-legal a {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}
.footer-legal a:hover { color: var(--text-secondary); }

/* ─── Notifications / Toast ──────────────────────────────────── */
.toast-container {
  position: fixed;
  top: calc(var(--header-height) + 16px);
  right: 20px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 360px;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  box-shadow: var(--shadow-lg);
  animation: toastIn 300ms ease forwards;
}

.toast-success { border-left: 3px solid var(--success); }
.toast-error   { border-left: 3px solid var(--error); }
.toast-info    { border-left: 3px solid var(--primary); }

.toast-icon { width: 18px; height: 18px; flex-shrink: 0; margin-top: 1px; }
.toast-success .toast-icon { color: var(--success); }
.toast-error   .toast-icon { color: var(--error); }
.toast-info    .toast-icon { color: var(--primary-light); }

.toast-body { flex: 1; }
.toast-title { font-weight: 600; font-size: 0.9375rem; margin-bottom: 2px; }
.toast-message { font-size: 0.875rem; color: var(--text-secondary); }

/* ─── Animations ─────────────────────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(124,58,237,0.3); }
  50%       { box-shadow: 0 0 40px rgba(124,58,237,0.5); }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-8px); }
}

@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position:  200% 0; }
}

/* Reveal animations au scroll */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.revealed {
  opacity: 1;
  transform: none;
}
.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }

/* ─── Overlay / Modal ────────────────────────────────────────── */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  animation: fadeIn 200ms ease;
}

/* ─── Skeleton Loader ────────────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg,
    var(--bg-card) 25%,
    var(--bg-card-hover) 50%,
    var(--bg-card) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

/* ─── Page Loader ────────────────────────────────────────────── */
.page-loader {
  position: fixed;
  inset: 0;
  background: var(--bg-base);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.page-loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  animation: dot-bounce 1.4s ease-in-out infinite both;
}

.loader-dot:nth-child(1) { animation-delay: 0s; }
.loader-dot:nth-child(2) { animation-delay: 0.16s; }
.loader-dot:nth-child(3) { animation-delay: 0.32s; }

@keyframes dot-bounce {
  0%, 80%, 100% { transform: scale(0); opacity: 0.5; }
  40%           { transform: scale(1); opacity: 1; }
}

/* ─── Responsive ─────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-2xl); }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
    --spacing-4xl: 5rem;
    --spacing-3xl: 3.5rem;
  }

  .container { padding: 0 var(--spacing-lg); }

  .nav { display: none; }
  .nav-actions .btn:not(.btn-primary) { display: none; }
  .hamburger { display: flex; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr; gap: var(--spacing-2xl); }
  .footer-brand-desc { max-width: 100%; }

  .footer-bottom { flex-direction: column; text-align: center; }

  .text-6xl { font-size: 2.5rem; }
  .text-5xl { font-size: 2rem; }

  .section-title { font-size: clamp(1.5rem, 5vw, 2rem); }

  .hero-glow { width: 400px; height: 300px; }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--spacing-md); }
  .btn-xl { padding: 0.9rem 1.75rem; font-size: 1rem; }
  .toast-container { right: 12px; left: 12px; max-width: none; }
}