/* ===================================
   RoboKit STEM Academy - Main Styles
   Light Theme + Responsive
=================================== */

:root {
  /* Backgrounds */
  --bg-light:     #f5f7ff;
  --bg-card:      #ffffff;
  --bg-elevated:  #eef1f9;
  --bg-glass:     rgba(255,255,255,0.85);

  /* Brand accents — kept vivid for identity, adjusted for light bg */
  --cyan:         #0088cc;
  --cyan-soft:    #e0f4ff;
  --green:        #16a34a;
  --green-soft:   #dcfce7;
  --orange:       #e05a1a;
  --orange-soft:  #fff0e8;
  --purple:       #6d28d9;
  --purple-soft:  #ede9fe;
  --pink:         #c026d3;

  /* Text */
  --text-primary:   #0f172a;
  --text-secondary: #374151;
  --text-muted:     #9ca3af;

  /* Borders */
  --border:       #d1d9ea;
  --border-hover: #93afd4;

  /* Radius */
  --radius-sm: 8px;
  --radius:    12px;
  --radius-lg: 20px;
  --radius-xl: 32px;

  /* Shadows — use navy-tinted drops for depth on white */
  --shadow-glow:  0 0 40px rgba(0,136,204,0.12);
  --shadow-card:  0 4px 24px rgba(10,36,99,0.08);
  --shadow-hover: 0 12px 40px rgba(10,36,99,0.14);

  /* Fonts */
  --font-body:    'Bahnschrift', sans-serif;
  --font-display: 'Bahnschrift', sans-serif;
  --font-mono:    'Bahnschrift', monospace;

  /* Transitions */
  --transition:      all 0.3s cubic-bezier(0.4,0,0.2,1);
  --transition-fast: all 0.15s ease;
  --transition-slow: all 0.6s cubic-bezier(0.4,0,0.2,1);
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--bg-light);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}
a { text-decoration: none; color: inherit; transition: var(--transition-fast); }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select {
  font-family: inherit;
  background: transparent;
  color: var(--text-primary);
  border: none;
  outline: none;
}

/* ===== LOADER ===== */
#pageLoader {
  position: fixed; inset: 0;
  background: var(--bg-light);
  display: flex; align-items: center; justify-content: center;
  z-index: 9999;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}
#pageLoader.hidden { opacity: 0; visibility: hidden; }
.loader-inner { text-align: center; }
.loader-gear {
  font-size: 3rem;
  animation: spin 1s linear infinite;
  display: block;
  color: var(--cyan);
}
.loader-text {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-top: 0.5rem;
  letter-spacing: 0.1em;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== FLASH MESSAGES ===== */
.flash-message {
  position: fixed; top: 80px; right: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.5rem;
  display: flex; align-items: center; gap: 0.75rem;
  z-index: 1000;
  animation: slideIn 0.3s ease;
  max-width: 400px;
  box-shadow: var(--shadow-card);
}
.flash-success { border-color: #16a34a; }
.flash-success i { color: #16a34a; }
.flash-error { border-color: #dc2626; }
.flash-error i { color: #dc2626; }
.flash-message button { margin-left: auto; color: var(--text-muted); font-size: 1.25rem; }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ===== NAVBAR ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(245,247,255,0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.navbar.scrolled {
  background: rgba(255,255,255,0.98);
  box-shadow: 0 4px 24px rgba(10,36,99,0.08);
}
.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 70px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-brand {
  display: flex; align-items: center; gap: 0.75rem;
}
.brand-icon { flex-shrink: 0; }
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-main { font-family: var(--font-display); font-size: 1.25rem; font-weight: 800; color: var(--text-primary); }
.brand-sub { font-size: 0.65rem; color: var(--cyan); text-transform: uppercase; letter-spacing: 0.1em; font-weight: 500; }

.nav-links {
  display: flex; align-items: center; gap: 0.25rem;
}
.nav-link {
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.9rem;
  transition: var(--transition-fast);
}
.nav-link:hover, .nav-link.active { color: var(--text-primary); background: var(--bg-elevated); }
.nav-link.active { color: var(--cyan); }
.admin-link { color: var(--orange) !important; }

.btn-nav-cta {
  padding: 0.5rem 1.25rem;
  background: var(--cyan);
  color: #fff !important;
  font-weight: 700;
  font-size: 0.875rem;
  border-radius: var(--radius);
  margin-left: 0.5rem;
  transition: var(--transition);
}
.btn-nav-cta:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(0,136,204,0.3); }

.nav-cart {
  position: relative;
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}
.nav-cart:hover { color: var(--cyan); background: var(--bg-elevated); }
.cart-badge {
  position: absolute; top: 4px; right: 4px;
  background: var(--orange);
  color: white;
  font-size: 0.6rem; font-weight: 700;
  width: 16px; height: 16px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}

.nav-user-menu { position: relative; }
.nav-avatar {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.4rem 0.875rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 0.875rem; font-weight: 500;
  transition: var(--transition-fast);
}
.nav-avatar:hover { border-color: var(--cyan); background: var(--cyan-soft); }
.nav-avatar i:first-child { font-size: 1.125rem; color: var(--cyan); }

.user-dropdown {
  position: absolute; top: calc(100% + 8px); right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.5rem;
  min-width: 180px;
  opacity: 0; visibility: hidden;
  transform: translateY(-8px);
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}
.user-dropdown.open { opacity: 1; visibility: visible; transform: translateY(0); }
.user-dropdown a {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.625rem 0.875rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: var(--transition-fast);
}
.user-dropdown a:hover { background: var(--bg-elevated); color: var(--text-primary); }
.user-dropdown a i { width: 16px; color: var(--cyan); }
.dropdown-divider { height: 1px; background: var(--border); margin: 0.375rem 0; }

.nav-toggle {
  display: none;
  flex-direction: column; gap: 5px;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== COMMON LAYOUT ===== */
.page-wrapper { padding-top: 70px; min-height: 100vh; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 1.5rem; }
.section { padding: 6rem 0; }
.section-sm { padding: 4rem 0; }

/* Section headers */
.section-header { text-align: center; margin-bottom: 4rem; }
.section-tag {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: var(--cyan-soft);
  border: 1px solid rgba(0,136,204,0.25);
  color: var(--cyan);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  padding: 0.375rem 0.875rem;
  border-radius: 100px;
  margin-bottom: 1.25rem;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1rem;
  color: var(--text-primary);
}
.section-title span { color: var(--cyan); }
.section-desc { color: var(--text-secondary); font-size: 1.1rem; max-width: 600px; margin: 0 auto; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  font-weight: 600; font-size: 0.9rem;
  transition: var(--transition);
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary {
  background: var(--cyan);
  color: #fff;
  box-shadow: 0 4px 16px rgba(0,136,204,0.2);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,136,204,0.35); }
.btn-secondary {
  background: var(--cyan-soft);
  color: var(--cyan);
  border: 1px solid rgba(0,136,204,0.25);
}
.btn-secondary:hover { background: #c8e9f7; border-color: var(--cyan); }
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-hover);
}
.btn-outline:hover { background: var(--bg-elevated); border-color: var(--text-secondary); }
.btn-danger {
  background: #fef2f2;
  color: #dc2626;
  border: 1px solid #fca5a5;
}
.btn-danger:hover { background: #fee2e2; }
.btn-green {
  background: var(--green);
  color: #fff;
}
.btn-green:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(22,163,74,0.3); }
.btn-orange {
  background: var(--orange);
  color: #fff;
}
.btn-orange:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(224,90,26,0.3); }
.btn-lg { padding: 1rem 2rem; font-size: 1rem; }
.btn-sm { padding: 0.5rem 1rem; font-size: 0.8rem; }
.btn-full { width: 100%; justify-content: center; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }

/* ===== CARDS ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}
.card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

/* ===== FORMS ===== */
.form-group { margin-bottom: 1.25rem; }
.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}
.form-control {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: var(--transition-fast);
}
.form-control:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(0,136,204,0.1); }
.form-control::placeholder { color: var(--text-muted); }
.form-control.error { border-color: #dc2626; }
.form-error { font-size: 0.8rem; color: #dc2626; margin-top: 0.375rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.input-icon { position: relative; }
.input-icon i { position: absolute; left: 1rem; top: 50%; transform: translateY(-50%); color: var(--text-muted); }
.input-icon .form-control { padding-left: 2.75rem; }

/* ===== BADGES ===== */
.badge {
  display: inline-flex; align-items: center;
  padding: 0.25rem 0.625rem;
  border-radius: 100px;
  font-size: 0.7rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.05em;
}
.badge-cyan    { background: var(--cyan-soft); color: var(--cyan); border: 1px solid rgba(0,136,204,0.25); }
.badge-green   { background: var(--green-soft); color: var(--green); border: 1px solid rgba(22,163,74,0.25); }
.badge-orange  { background: var(--orange-soft); color: var(--orange); border: 1px solid rgba(224,90,26,0.25); }
.badge-purple  { background: var(--purple-soft); color: var(--purple); border: 1px solid rgba(109,40,217,0.25); }
.badge-beginner    { background: var(--green-soft); color: var(--green); }
.badge-intermediate{ background: var(--cyan-soft); color: var(--cyan); }
.badge-advanced    { background: var(--orange-soft); color: var(--orange); }

/* ===== HERO ===== */
.hero {
  min-height: 90vh;
  display: flex; align-items: center;
  position: relative;
  overflow: hidden;
  padding: 7rem 0 4rem;
  background: linear-gradient(160deg, #e8f4ff 0%, #f0f6ff 40%, #f5f0ff 100%);
}
.hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 50%, rgba(0,136,204,0.08) 0%, transparent 60%),
    radial-gradient(ellipse 50% 60% at 10% 30%, rgba(22,163,74,0.05) 0%, transparent 50%);
}
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(0,136,204,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,136,204,0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 80%);
}
.hero-content {
  position: relative; z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: var(--cyan-soft);
  border: 1px solid rgba(0,136,204,0.25);
  color: var(--cyan);
  font-size: 0.75rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.15em;
  padding: 0.375rem 1rem;
  border-radius: 100px;
  margin-bottom: 1.5rem;
}
.hero-eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); animation: pulse 2s infinite; }
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.05;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}
.hero-title .accent { color: var(--cyan); }
.hero-title .accent-green { color: var(--green); }
.hero-desc { font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 2.5rem; line-height: 1.7; max-width: 520px; }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 3rem; }
.hero-stats { display: flex; gap: 2.5rem; flex-wrap: wrap; }
.hero-stat-num {
  font-family: var(--font-display);
  font-size: 1.75rem; font-weight: 800;
  color: var(--text-primary);
}
.hero-stat-num span { color: var(--cyan); }
.hero-stat-label { font-size: 0.8rem; color: var(--text-muted); margin-top: 0.125rem; }

/* Robot visual in hero */
.hero-visual {
  position: relative;
  display: flex; align-items: center; justify-content: center;
}
.hero-robot {
  width: 100%;
  max-width: 480px;
  aspect-ratio: 1;
  position: relative;
}
.robot-glow {
  position: absolute; inset: -20%;
  background: radial-gradient(circle, rgba(0,136,204,0.1) 0%, transparent 70%);
  animation: pulse 3s ease-in-out infinite;
}
.robot-svg { position: relative; z-index: 1; }
.float-badge {
  position: absolute;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  display: flex; align-items: center; gap: 0.625rem;
  font-size: 0.8rem; font-weight: 600;
  box-shadow: var(--shadow-card);
  white-space: nowrap;
  animation: float 3s ease-in-out infinite;
  color: var(--text-primary);
}
.float-badge.badge-1 { top: 10%; left: -5%; animation-delay: 0s; }
.float-badge.badge-2 { bottom: 20%; right: -5%; animation-delay: 1.5s; }
.float-badge .badge-icon { font-size: 1.25rem; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.6; } }

/* ===== KIT CARDS ===== */
.kits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.75rem;
}
.kit-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  position: relative;
  display: flex; flex-direction: column;
}
.kit-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
  transform: translateY(-6px);
}
.kit-card-image {
  height: 200px;
  background: linear-gradient(135deg, #dbeafe, #e0f2fe);
  display: flex; align-items: center; justify-content: center;
  position: relative;
  overflow: hidden;
}
.kit-card-image::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 80%, rgba(0,136,204,0.08) 0%, transparent 60%);
}
.kit-robot-icon {
  font-size: 5rem;
  position: relative; z-index: 1;
  filter: drop-shadow(0 4px 16px rgba(0,136,204,0.2));
  animation: float 4s ease-in-out infinite;
}
.kit-badge-overlay {
  position: absolute; top: 1rem; right: 1rem;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 0.25rem 0.75rem;
  font-size: 0.7rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--cyan);
}
.kit-card-body { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; }
.kit-meta {
  display: flex; align-items: center; gap: 0.5rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}
.kit-level { font-size: 0.7rem; font-weight: 600; text-transform: uppercase; padding: 0.2rem 0.5rem; border-radius: 100px; }
.kit-age { font-size: 0.75rem; color: var(--text-muted); }
.kit-name {
  font-family: var(--font-display);
  font-size: 1.1rem; font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  line-height: 1.3;
}
.kit-desc { font-size: 0.875rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 1rem; flex: 1; }
.kit-projects {
  display: flex; gap: 0.375rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}
.kit-project-tag {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.7rem;
  padding: 0.2rem 0.5rem;
  border-radius: 100px;
}
.kit-card-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}
.kit-price-group { display: flex; align-items: baseline; gap: 0.5rem; }
.kit-price { font-family: var(--font-display); font-size: 1.4rem; font-weight: 800; color: var(--text-primary); }
.kit-original-price { font-size: 0.85rem; color: var(--text-muted); text-decoration: line-through; }
.kit-discount { font-size: 0.7rem; font-weight: 700; color: var(--green); }
.kit-actions { display: flex; gap: 0.5rem; }
.btn-add-cart {
  width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  background: var(--cyan-soft);
  border: 1px solid rgba(0,136,204,0.25);
  border-radius: var(--radius-sm);
  color: var(--cyan);
  transition: var(--transition-fast);
}
.btn-add-cart:hover { background: #c8e9f7; border-color: var(--cyan); }

/* ===== FEATURES ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.5rem;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  text-align: center;
  transition: var(--transition);
}
.feature-card:hover { border-color: var(--border-hover); transform: translateY(-4px); box-shadow: var(--shadow-card); }
.feature-icon {
  width: 60px; height: 60px;
  margin: 0 auto 1.25rem;
  display: flex; align-items: center; justify-content: center;
  background: var(--cyan-soft);
  border: 1px solid rgba(0,136,204,0.2);
  border-radius: var(--radius);
  font-size: 1.5rem;
  color: var(--cyan);
}
.feature-title { font-weight: 700; margin-bottom: 0.5rem; font-size: 0.95rem; color: var(--text-primary); }
.feature-desc { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.5; }

/* ===== PROCESS / STEPS ===== */
.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  position: relative;
}
.step-card { text-align: center; position: relative; }
.step-number {
  width: 52px; height: 52px;
  margin: 0 auto 1.25rem;
  display: flex; align-items: center; justify-content: center;
  background: var(--cyan);
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 1.25rem; font-weight: 800;
  color: #fff;
  position: relative; z-index: 1;
}
.step-title { font-weight: 700; margin-bottom: 0.5rem; color: var(--text-primary); }
.step-desc { font-size: 0.875rem; color: var(--text-secondary); }

/* ===== TESTIMONIALS ===== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}
.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}
.testimonial-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.testimonial-card::before {
  content: '"';
  position: absolute; top: 1rem; right: 1.5rem;
  font-size: 5rem;
  font-family: var(--font-display);
  color: rgba(0,136,204,0.07);
  line-height: 1;
}
.testimonial-stars { color: #f59e0b; font-size: 0.875rem; margin-bottom: 1rem; letter-spacing: 2px; }
.testimonial-text { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; margin-bottom: 1.25rem; }
.testimonial-author { display: flex; align-items: center; gap: 0.75rem; }
.author-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.875rem; color: #fff;
}
.author-name { font-weight: 600; font-size: 0.875rem; color: var(--text-primary); }
.author-school { font-size: 0.75rem; color: var(--text-muted); }

/* ===== AUTH FORMS ===== */
.auth-page {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 5rem 1.5rem 2rem;
  background:
    radial-gradient(ellipse 60% 60% at 20% 50%, rgba(0,136,204,0.06) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 80% 20%, rgba(22,163,74,0.04) 0%, transparent 50%),
    var(--bg-light);
}
.auth-container {
  width: 100%;
  max-width: 460px;
}
.auth-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-card);
}
.auth-header { text-align: center; margin-bottom: 2rem; }
.auth-logo { margin-bottom: 1.5rem; }
.auth-title { font-family: var(--font-display); font-size: 1.75rem; font-weight: 800; margin-bottom: 0.5rem; color: var(--text-primary); }
.auth-subtitle { color: var(--text-secondary); font-size: 0.9rem; }
.auth-divider {
  display: flex; align-items: center; gap: 1rem;
  margin: 1.5rem 0;
  color: var(--text-muted); font-size: 0.8rem;
}
.auth-divider::before, .auth-divider::after {
  content: ''; flex: 1;
  height: 1px; background: var(--border);
}
.auth-footer { text-align: center; margin-top: 1.5rem; font-size: 0.875rem; color: var(--text-secondary); }
.auth-footer a { color: var(--cyan); font-weight: 600; }

/* ===== DASHBOARD ===== */
.dashboard-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 0;
  min-height: calc(100vh - 70px);
}
.sidebar {
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  padding: 2rem 1rem;
  position: sticky;
  top: 70px;
  height: calc(100vh - 70px);
  overflow-y: auto;
}
.sidebar-nav { display: flex; flex-direction: column; gap: 0.25rem; }
.sidebar-link {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 0.9rem; font-weight: 500;
  transition: var(--transition-fast);
}
.sidebar-link:hover { background: var(--bg-elevated); color: var(--text-primary); }
.sidebar-link.active { background: var(--cyan-soft); color: var(--cyan); }
.sidebar-link i { width: 18px; }
.sidebar-section { margin-top: 1.5rem; margin-bottom: 0.5rem; padding: 0 1rem; font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.15em; color: var(--text-muted); font-weight: 600; }
.dashboard-main { padding: 2.5rem; overflow-y: auto; }
.dash-title { font-family: var(--font-display); font-size: 1.75rem; font-weight: 800; margin-bottom: 2rem; color: var(--text-primary); }
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: var(--transition);
}
.stat-card:hover { box-shadow: var(--shadow-card); }
.stat-icon { font-size: 1.5rem; margin-bottom: 0.75rem; }
.stat-value { font-family: var(--font-display); font-size: 2rem; font-weight: 800; color: var(--text-primary); }
.stat-label { font-size: 0.8rem; color: var(--text-muted); margin-top: 0.25rem; }

/* ===== KIT DETAIL ===== */
.kit-detail-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.kit-image-main {
  background: linear-gradient(135deg, #dbeafe, #e0f2fe);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 3rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.kit-image-main::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 80%, rgba(0,136,204,0.08) 0%, transparent 60%);
}
.kit-hero-icon { font-size: 8rem; position: relative; z-index: 1; }
.kit-detail-title { font-family: var(--font-display); font-size: 2rem; font-weight: 800; margin-bottom: 1rem; color: var(--text-primary); }
.kit-detail-price { font-family: var(--font-display); font-size: 2.5rem; font-weight: 800; color: var(--cyan); margin-bottom: 1.5rem; }
.kit-original { font-size: 1.1rem; color: var(--text-muted); text-decoration: line-through; margin-left: 0.5rem; }
.components-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}
.component-item {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.85rem; color: var(--text-secondary);
}
.component-item i { color: var(--cyan); font-size: 0.7rem; }
.tabs { display: flex; gap: 0.25rem; margin-bottom: 1.5rem; border-bottom: 1px solid var(--border); overflow-x: auto; }
.tab-btn {
  padding: 0.75rem 1.25rem;
  font-size: 0.9rem; font-weight: 600;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: var(--transition-fast);
  white-space: nowrap;
}
.tab-btn.active { color: var(--cyan); border-color: var(--cyan); }
.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* ===== CART ===== */
.cart-layout { display: grid; grid-template-columns: 1fr 360px; gap: 2.5rem; align-items: start; }
.cart-item {
  display: flex; gap: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-bottom: 1rem;
  align-items: center;
  transition: var(--transition);
}
.cart-item:hover { border-color: var(--border-hover); box-shadow: var(--shadow-card); }
.cart-item-img {
  width: 80px; height: 80px;
  background: linear-gradient(135deg, #dbeafe, #e0f2fe);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 2.5rem;
  flex-shrink: 0;
}
.cart-item-info { flex: 1; min-width: 0; }
.cart-item-name { font-weight: 700; margin-bottom: 0.25rem; color: var(--text-primary); }
.cart-item-meta { font-size: 0.8rem; color: var(--text-muted); }
.qty-control { display: flex; align-items: center; gap: 0.5rem; margin-top: 0.5rem; }
.qty-btn { width: 28px; height: 28px; display: flex; align-items: center; justify-content: center; background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius-sm); color: var(--text-primary); transition: var(--transition-fast); }
.qty-btn:hover { border-color: var(--cyan); color: var(--cyan); }
.qty-input { width: 40px; text-align: center; background: transparent; font-weight: 600; color: var(--text-primary); }
.cart-item-price { font-family: var(--font-display); font-size: 1.25rem; font-weight: 800; text-align: right; color: var(--text-primary); }
.order-summary {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  position: sticky; top: 90px;
}
.summary-row { display: flex; justify-content: space-between; align-items: center; padding: 0.625rem 0; font-size: 0.9rem; color: var(--text-secondary); }
.summary-row.total { font-weight: 700; font-size: 1.1rem; border-top: 1px solid var(--border); margin-top: 0.5rem; padding-top: 1rem; color: var(--text-primary); }

/* ===== ADMIN ===== */
.admin-layout { display: grid; grid-template-columns: 240px 1fr; min-height: calc(100vh - 70px); }
.admin-sidebar { background: var(--bg-card); border-right: 1px solid var(--border); padding: 1.5rem 1rem; }
.admin-main { padding: 2.5rem; background: var(--bg-light); }
.admin-title { font-family: var(--font-display); font-size: 1.5rem; font-weight: 800; margin-bottom: 2rem; color: var(--text-primary); }
.data-table { width: 100%; border-collapse: collapse; }
.data-table th {
  text-align: left; padding: 0.875rem 1rem;
  font-size: 0.75rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--text-muted);
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}
.data-table td { padding: 1rem; border-bottom: 1px solid var(--border); font-size: 0.9rem; color: var(--text-primary); }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--bg-elevated); }
.table-wrapper { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; }

/* ===== STATUS PILLS ===== */
.status-pill { display: inline-flex; align-items: center; gap: 0.375rem; padding: 0.25rem 0.625rem; border-radius: 100px; font-size: 0.75rem; font-weight: 600; }
.status-pending   { background: #fef9c3; color: #854d0e; }
.status-confirmed { background: var(--cyan-soft); color: var(--cyan); }
.status-delivered { background: var(--green-soft); color: var(--green); }
.status-cancelled { background: #fee2e2; color: #dc2626; }
.status-active    { background: var(--green-soft); color: var(--green); }
.status-approved  { background: var(--green-soft); color: var(--green); }

/* ===== CONTACT ===== */
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: start; }
.contact-info-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
}
.contact-item { display: flex; gap: 1rem; margin-bottom: 1.75rem; }
.contact-icon { width: 44px; height: 44px; flex-shrink: 0; background: var(--cyan-soft); border: 1px solid rgba(0,136,204,0.2); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; color: var(--cyan); }
.contact-label { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.08em; font-weight: 600; margin-bottom: 0.25rem; }
.contact-value { font-weight: 600; color: var(--text-primary); }

/* ===== FOOTER ===== */
.footer { background: #0a1628; border-top: 1px solid #1e2e4a; }
.footer-top {
  max-width: 1280px; margin: 0 auto;
  padding: 4rem 1.5rem;
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 4rem;
}
.footer-brand p { color: #94a3b8; font-size: 0.875rem; line-height: 1.6; margin-top: 1rem; }
.footer-logo { display: flex; align-items: center; gap: 0.75rem; font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; color: #fff; }
.footer-social { display: flex; gap: 0.75rem; margin-top: 1.5rem; }
.footer-social a { width: 38px; height: 38px; display: flex; align-items: center; justify-content: center; background: rgba(255,255,255,0.07); border: 1px solid rgba(255,255,255,0.1); border-radius: var(--radius-sm); color: #94a3b8; transition: var(--transition-fast); }
.footer-social a:hover { border-color: var(--cyan); color: var(--cyan); }
.footer-links { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; }
.footer-col h4 { font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: #94a3b8; margin-bottom: 1.25rem; }
.footer-col ul li { margin-bottom: 0.625rem; }
.footer-col ul li a { font-size: 0.875rem; color: #64748b; transition: var(--transition-fast); }
.footer-col ul li a:hover { color: var(--cyan); }
.contact-list li { display: flex; align-items: flex-start; gap: 0.625rem; font-size: 0.85rem; color: #64748b; margin-bottom: 0.625rem; }
.contact-list li i { color: var(--cyan); margin-top: 0.15rem; flex-shrink: 0; }
.footer-newsletter {
  max-width: 1280px; margin: 0 auto;
  padding: 2.5rem 1.5rem;
  border-top: 1px solid #1e2e4a;
  display: flex; align-items: center; justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}
.newsletter-content h3 { font-family: var(--font-display); font-size: 1.25rem; font-weight: 700; margin-bottom: 0.25rem; color: #fff; }
.newsletter-content p { font-size: 0.875rem; color: #64748b; }
.newsletter-form { display: flex; gap: 0.75rem; flex: 1; max-width: 450px; }
.newsletter-form input { flex: 1; min-width: 0; background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1); border-radius: var(--radius); padding: 0.75rem 1rem; color: #fff; font-family: inherit; font-size: 0.9rem; }
.newsletter-form input:focus { border-color: var(--cyan); outline: none; }
.newsletter-form input::placeholder { color: #475569; }
.footer-bottom {
  max-width: 1280px; margin: 0 auto;
  padding: 1.5rem;
  border-top: 1px solid #1e2e4a;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 1rem;
}
.footer-bottom p { font-size: 0.8rem; color: #475569; }
.footer-legal { display: flex; gap: 1.5rem; }
.footer-legal a { font-size: 0.8rem; color: #475569; transition: var(--transition-fast); }
.footer-legal a:hover { color: var(--cyan); }

/* ===== UTILITIES ===== */
.text-cyan     { color: var(--cyan); }
.text-green    { color: var(--green); }
.text-orange   { color: var(--orange); }
.text-muted    { color: var(--text-muted); }
.text-secondary{ color: var(--text-secondary); }
.font-display  { font-family: var(--font-display); }
.font-mono     { font-family: var(--font-mono); }
.fw-700 { font-weight: 700; }
.fw-800 { font-weight: 800; }
.text-center { text-align: center; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-6 { margin-bottom: 3rem; }
.mt-4 { margin-top: 2rem; }
.d-flex { display: flex; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.divider { height: 1px; background: var(--border); margin: 2rem 0; }
.empty-state { text-align: center; padding: 4rem 2rem; color: var(--text-muted); }
.empty-state i { font-size: 3rem; margin-bottom: 1rem; opacity: 0.4; }
.empty-state h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.5rem; color: var(--text-secondary); }

/* ===== BREADCRUMB ===== */
.breadcrumb { display: flex; align-items: center; gap: 0.5rem; font-size: 0.8rem; color: var(--text-muted); margin-bottom: 2rem; flex-wrap: wrap; }
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb .sep { color: var(--text-muted); }
.breadcrumb .current { color: var(--text-secondary); }

/* ===== PAGE HERO ===== */
.page-hero {
  padding: 5rem 0 3rem;
  background: linear-gradient(180deg, rgba(0,136,204,0.04) 0%, transparent 100%);
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.page-hero-title { font-family: var(--font-display); font-size: clamp(1.75rem, 4vw, 3rem); font-weight: 800; margin-bottom: 0.75rem; color: var(--text-primary); }
.page-hero-desc { color: var(--text-secondary); max-width: 560px; margin: 0 auto; }

/* ===== CTA SECTION ===== */
.cta-section {
  background: linear-gradient(135deg, #0a1628, #0d1f3c);
  border-radius: var(--radius-xl);
  padding: 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  color: #fff;
}
.cta-section::before {
  content: '';
  position: absolute; top: -50%; left: -50%; right: -50%; bottom: -50%;
  background: radial-gradient(circle, rgba(0,136,204,0.08) 0%, transparent 50%);
}
.cta-title { font-family: var(--font-display); font-size: 2.25rem; font-weight: 800; margin-bottom: 1rem; position: relative; z-index: 1; }
.cta-desc { color: rgba(255,255,255,0.75); margin-bottom: 2rem; position: relative; z-index: 1; }
.cta-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; position: relative; z-index: 1; }

/* ===== SEARCH & FILTER ===== */
.filter-bar { display: flex; gap: 1rem; align-items: center; margin-bottom: 2.5rem; flex-wrap: wrap; }
.filter-btn {
  padding: 0.5rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--text-secondary);
  font-size: 0.85rem; font-weight: 500;
  transition: var(--transition-fast);
}
.filter-btn:hover, .filter-btn.active { border-color: var(--cyan); color: var(--cyan); background: var(--cyan-soft); }
.search-bar {
  flex: 1; min-width: 200px;
  position: relative;
}
.search-bar i { position: absolute; left: 1rem; top: 50%; transform: translateY(-50%); color: var(--text-muted); }
.search-bar input { width: 100%; background: var(--bg-card); border: 1px solid var(--border); border-radius: 100px; padding: 0.625rem 1rem 0.625rem 2.5rem; color: var(--text-primary); font-size: 0.875rem; font-family: inherit; }
.search-bar input:focus { border-color: var(--cyan); outline: none; box-shadow: 0 0 0 3px rgba(0,136,204,0.1); }
.search-bar input::placeholder { color: var(--text-muted); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; text-align: center; }
  .hero-visual { display: none; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-desc { margin: 0 auto 2.5rem; }
  .kit-detail-layout { grid-template-columns: 1fr; }
  .cart-layout { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-links { grid-template-columns: repeat(2, 1fr); }
  .dashboard-layout { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .admin-layout { grid-template-columns: 1fr; }
  .admin-sidebar { display: none; }
}

@media (max-width: 768px) {
  .nav-links {
    display: none; flex-direction: column;
    position: fixed; inset: 70px 0 0 0;
    background: var(--bg-card);
    padding: 2rem 1.5rem; gap: 0.5rem;
    border-top: 1px solid var(--border);
    overflow-y: auto; z-index: 50;
    box-shadow: var(--shadow-card);
  }
  .nav-links.open { display: flex; }
  .nav-link { padding: 0.875rem 1rem; border-radius: var(--radius); font-size: 1rem; }
  .nav-toggle { display: flex; }
  .form-row { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-links { grid-template-columns: repeat(2, 1fr); }
  .footer-newsletter { flex-direction: column; }
  .newsletter-form { max-width: 100%; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 4rem 0; }
  .cta-section { padding: 2.5rem 1.5rem; }
  .cta-title { font-size: 1.75rem; }
  .auth-card { padding: 1.75rem; }
  .components-list { grid-template-columns: 1fr; }
  .filter-bar { flex-direction: column; align-items: stretch; }
  .kits-grid { grid-template-columns: 1fr; }
  .kit-detail-layout { gap: 2rem; }
  .container { padding: 0 1rem; }
  .dashboard-main { padding: 1.5rem 1rem; }
}

@media (max-width: 480px) {
  .features-grid { grid-template-columns: 1fr; }
  .kits-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 2rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .footer-links { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .footer-top { padding: 2.5rem 1rem; }
  .stats-row { grid-template-columns: 1fr 1fr; }
  .order-summary { position: static; }
  .process-steps { grid-template-columns: 1fr; }
}