:root {
  --primary: #0f172a;
  --secondary: #1e293b;
  --accent: #f59e0b;
  --accent-2: #06b6d4;
  --success: #16a34a;
  --danger: #dc2626;
  --warning: #d97706;
  --muted: #64748b;
  --border: #e2e8f0;
  --card: #ffffff;
  --bg: #f8fafc;
  --radius: 20px;
  --shadow: 0 20px 60px rgba(15, 23, 42, 0.08);
  --container: 1400px;
}

/* ===== Reset ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  min-width: 0;
}

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

body {
  margin: 0;
  font-family: Inter, sans-serif;
  background: var(--bg);
  color: var(--secondary);
  overflow-x: hidden;
  line-height: 1.5;
}

a {
  text-decoration: none;
  color: inherit;
}

img,
video,
iframe,
svg,
canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

button,
input,
select,
textarea {
  font: inherit;
}

input,
select,
textarea {
  width: 100%;
}

ul,
ol {
  padding-left: 1.2rem;
}

.container {
  width: min(var(--container), calc(100% - 32px));
  margin-inline: auto;
}

.section {
  padding: clamp(40px, 6vw, 72px) 0;
}

.muted {
  color: var(--muted);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: none;
  border-radius: 999px;
  padding: 14px 22px;
  font-weight: 700;
  cursor: pointer;
  transition: 0.25s ease;
  white-space: normal;
  text-align: center;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #fb923c);
  color: #111827;
  box-shadow: 0 12px 30px rgba(245, 158, 11, 0.25);
}

.btn-secondary {
  background: #e0f2fe;
  color: #0c4a6e;
}

.btn-outline {
  background: #fff;
  border: 1px solid var(--border);
  color: var(--primary);
}

.btn-outline-light {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
}

.btn-danger {
  background: #fee2e2;
  color: #991b1b;
}

.btn-sm {
  padding: 10px 16px;
  font-size: 0.92rem;
}

/* ===== Pills / Badge ===== */
.pill,
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 0.84rem;
  font-weight: 700;
}

.pill {
  background: #fff7ed;
  color: #9a3412;
  border: 1px solid #fed7aa;
}

.badge {
  background: #e2e8f0;
  color: #334155;
}

.badge.success {
  background: #dcfce7;
  color: #166534;
}

.badge.warning {
  background: #ffedd5;
  color: #9a3412;
}

.badge.danger {
  background: #fee2e2;
  color: #991b1b;
}

.badge.info {
  background: #e0f2fe;
  color: #075985;
}

/* ===== Alerts ===== */
.alert {
  padding: 14px 16px;
  border-radius: 14px;
  margin-bottom: 18px;
}

.alert.success {
  background: #dcfce7;
  color: #166534;
}

.alert.error {
  background: #fee2e2;
  color: #991b1b;
}

/* ===== Shared Cards ===== */
.card,
.panel,
.form-card,
.stat-card,
.hero-card,
.glass-card,
.feature-card,
.catalog-card,
.contact-card,
.testimonial-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(12px);
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 78px;
  position: relative;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: #fff;
  flex-shrink: 0;
}

.brand-logo {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 1.2rem;
  overflow: hidden;
  flex-shrink: 0;
  box-shadow: 0 12px 30px rgba(6, 182, 212, 0.25);
}

.brand-logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.brand-title {
  font-family: Poppins, sans-serif;
  font-weight: 800;
  line-height: 1.1;
}

.brand-subtitle {
  font-size: 0.8rem;
  color: #cbd5e1;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: #e2e8f0;
  flex-wrap: wrap;
}

.main-nav a {
  transition: 0.2s ease;
}

.main-nav a:hover {
  color: #fff;
}

.mobile-nav-toggle {
  display: none;
  border: none;
  background: transparent;
  color: #fff;
  font-size: 1.35rem;
  cursor: pointer;
}

/* ===== Hero ===== */
.hero {
  padding: clamp(40px, 7vw, 76px) 0 clamp(30px, 4vw, 42px);
  background: radial-gradient(circle at top right, #082f49 0, #0f172a 42%, #020617 100%);
  color: #fff;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  align-items: start;
}

.hero h1 {
  font: 800 clamp(1.9rem, 5vw, 4.25rem) / 1.1 Poppins, sans-serif;
  margin: 14px 0 16px;
}

.hero p {
  color: #cbd5e1;
  font-size: clamp(0.95rem, 2vw, 1.05rem);
}

.cta-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 22px;
}

.hero-card {
  padding: 26px;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.hero-card .mini-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 16px;
}

.hero-card .mini {
  background: rgba(255, 255, 255, 0.08);
  padding: 16px;
  border-radius: 16px;
}

/* ===== Slider ===== */
.slider {
  margin-top: 28px;
  overflow: hidden;
  border-radius: 24px;
  position: relative;
}

.slides {
  display: flex;
  transition: transform 0.5s ease;
}

.slide {
  min-width: 100%;
  position: relative;
  padding: clamp(48px, 8vw, 92px) clamp(18px, 4vw, 40px);
  background-size: cover;
  background-position: center;
}

.slide::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(2, 6, 23, 0.8), rgba(2, 6, 23, 0.25));
}

.slide-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
  color: #fff;
}

.slide h2 {
  font: 800 clamp(1.6rem, 4vw, 3rem) / 1.1 Poppins, sans-serif;
  margin: 0 0 14px;
}

/* ===== Grids ===== */
.stats-strip,
.grid-4,
.grid-3,
.grid-2,
.forms-grid,
.catalog-grid {
  display: grid;
  gap: 22px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.contact-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: minmax(280px, 0.9fr) minmax(280px, 1.1fr);
}

.info-strip {
  display: grid;
  gap: 24px;
  grid-template-columns: minmax(280px, 1.15fr) minmax(280px, 0.85fr);
}

.footer-grid {
  display: grid;
  gap: 28px;
  grid-template-columns: 1.4fr 0.8fr 1fr;
}

.dashboard-grid {
  display: grid;
  gap: 22px;
  grid-template-columns: 2fr 1fr;
}

.mini-panels {
  display: grid;
  gap: 22px;
  grid-template-columns: repeat(2, 1fr);
}

/* ===== Stats ===== */
.stat-card {
  padding: 22px;
}

.stat-card .label {
  color: var(--muted);
  font-weight: 600;
}

.stat-card .value {
  font: 800 2rem / 1 Poppins, sans-serif;
  margin-top: 12px;
}

/* ===== Cards ===== */
.feature-card,
.contact-card,
.testimonial-card {
  padding: 24px;
}

.catalog-card {
  overflow: hidden;
  padding: 0;
}

.catalog-card .thumb {
  aspect-ratio: 16 / 10;
  background: #e2e8f0;
}

.catalog-card .content {
  padding: 20px;
}

.catalog-card h3 {
  margin: 0 0 10px;
  font: 700 1.2rem Poppins, sans-serif;
}

.testimonial-card .fas.fa-quote-left {
  font-size: 1.5rem;
  color: var(--primary);
  margin-bottom: 16px;
  opacity: 0.7;
}

.testimonial-text {
  font-style: italic;
  line-height: 1.6;
  color: var(--secondary);
  margin-bottom: 16px;
  font-size: 0.95rem;
}

.student-name {
  font-weight: 600;
  color: var(--primary);
  margin: 0;
  font-size: 0.9rem;
  text-align: right;
}

.feature-icon {
  width: 58px;
  height: 58px;
  border-radius: 18px;
  background: #eff6ff;
  display: grid;
  place-items: center;
  font-size: 1.4rem;
  color: #1d4ed8;
  margin-bottom: 14px;
}

.meta-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 12px 0;
}

/* ===== Section heading ===== */
.section-title {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.section-title h2 {
  font: 800 clamp(1.5rem, 4vw, 2.7rem) / 1.1 Poppins, sans-serif;
  margin: 0;
}

/* ===== Forms ===== */
.form-card,
.panel {
  padding: 24px;
}

.form-card h2,
.panel h2 {
  margin-top: 0;
  font-family: Poppins, sans-serif;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group.full {
  grid-column: 1 / -1;
}

.form-group label {
  font-weight: 700;
  color: #334155;
}

.form-group input,
.form-group select,
.form-group textarea {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px 16px;
  background: #fff;
  outline: none;
}

.form-group textarea {
  min-height: 130px;
  resize: vertical;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent-2);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.12);
}

/* ===== Contact ===== */
.contact-list {
  display: grid;
  gap: 14px;
}

.contact-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #fff;
}

/* ===== Footer ===== */
.site-footer {
  background: #0f172a;
  color: #e2e8f0;
  padding-top: 54px;
  margin-top: 50px;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.footer-bottom {
  padding: 18px 0;
  margin-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: #94a3b8;
}

/* ===== Auth ===== */
.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background: linear-gradient(135deg, #082f49, #0f172a);
}

.auth-card {
  width: min(520px, 100%);
  background: #fff;
  border-radius: 28px;
  padding: 30px;
  box-shadow: var(--shadow);
}

/* ===== Admin ===== */
.admin-shell {
  display: grid;
  grid-template-columns: 290px minmax(0, 1fr);
  min-height: 100vh;
}

.admin-sidebar {
  background: #0f172a;
  color: #cbd5e1;
  padding: 22px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.admin-brand {
  display: flex;
  gap: 14px;
  align-items: center;
  margin-bottom: 24px;
}

.admin-brand span {
  display: block;
  color: #94a3b8;
  font-size: 0.85rem;
}

.admin-menu {
  display: grid;
  gap: 8px;
}

.admin-menu a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-radius: 14px;
  color: #cbd5e1;
}

.admin-menu a.active,
.admin-menu a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.admin-main {
  padding: 24px;
  min-width: 0;
}

.admin-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.admin-topbar h1 {
  margin: 0;
  font: 800 1.9rem Poppins, sans-serif;
}

.admin-user-badge {
  background: #fff;
  border: 1px solid var(--border);
  padding: 12px 16px;
  border-radius: 14px;
}

.admin-topbar-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-left: auto;
}

.admin-search {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.admin-search input {
  width: min(320px, 100%);
  min-width: 220px;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 12px 16px;
  background: #fff;
  outline: none;
}

.admin-search input:focus {
  border-color: var(--accent-2);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.12);
}

.panel-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.search-result-note {
  margin: 0;
  color: var(--muted);
}

.admin-nav-toggle {
  display: none;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  cursor: pointer;
}

.admin-content {
  display: grid;
  gap: 22px;
}

.admin-footer {
  margin-top: 26px;
  color: var(--muted);
}

/* ===== Table ===== */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: 16px;
}

.data-table {
  width: 100%;
  min-width: 700px;
  border-collapse: collapse;
  background: #fff;
}

.data-table th,
.data-table td {
  padding: 14px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.data-table th {
  font-size: 0.9rem;
  color: #475569;
  background: #f8fafc;
}

.inline-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.summary-list {
  display: grid;
  gap: 12px;
}

.summary-item {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #fff;
}

.empty-state {
  padding: 24px;
  text-align: center;
  color: var(--muted);
}

.category-section {
  margin-bottom: 44px;
}

.category-banner {
  padding: 22px 24px;
  margin-bottom: 18px;
  background: linear-gradient(135deg, #fff7ed, #eff6ff);
  border: 1px solid var(--border);
  border-radius: 22px;
}

.note {
  font-size: 0.9rem;
  color: var(--muted);
}

/* ===== Large tablets / small laptops ===== */
@media (max-width: 1100px) {

  .hero-grid,
  .dashboard-grid,
  .contact-grid,
  .info-strip,
  .footer-grid,
  .mini-panels {
    grid-template-columns: 1fr;
  }

  .admin-shell {
    grid-template-columns: 1fr;
  }

  .admin-sidebar {
    position: fixed;
    top: 0;
    left: -100%;
    width: min(320px, 85vw);
    height: 100vh;
    z-index: 1200;
    transition: left 0.3s ease;
  }

  .admin-sidebar.open {
    left: 0;
  }

  .admin-nav-toggle {
    display: inline-flex;
  }
}

/* ===== Tablet ===== */
@media (max-width: 900px) {

  .stats-strip,
  .grid-4,
  .grid-3,
  .grid-2,
  .forms-grid,
  .catalog-grid,
  .form-grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  }

  .hero-card .mini-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* ===== Mobile nav breakpoint ===== */
@media (max-width: 768px) {
  .nav-shell {
    min-height: 70px;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    width: 100%;
    background: #0f172a;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 18px;
    padding: 16px;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    box-shadow: 0 20px 50px rgba(15, 23, 42, 0.25);
  }

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

  .mobile-nav-toggle {
    display: inline-flex;
  }

  .brand-subtitle {
    display: none;
  }

  .hero-card .mini-grid,
  .stats-strip,
  .grid-4,
  .grid-3,
  .grid-2,
  .forms-grid,
  .catalog-grid,
  .form-grid,
  .contact-grid,
  .info-strip,
  .footer-grid,
  .dashboard-grid,
  .mini-panels {
    grid-template-columns: 1fr;
  }

  .section-title {
    flex-direction: column;
    align-items: flex-start;
  }

  .cta-row {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-row .btn {
    width: 100%;
  }

  .admin-topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .admin-topbar-meta,
  .admin-search {
    width: 100%;
  }

  .admin-search input {
    width: 100%;
    min-width: 0;
  }

  .admin-main {
    padding: 18px;
  }
}

/* ===== Small mobile ===== */
@media (max-width: 576px) {
  .container {
    width: calc(100% - 20px);
  }

  .hero h1 {
    font-size: clamp(1.7rem, 8vw, 2.4rem);
  }

  .hero-card,
  .form-card,
  .panel,
  .contact-card,
  .feature-card,
  .testimonial-card,
  .catalog-card .content {
    padding: 18px;
  }

  .slide {
    padding: 48px 16px;
  }

  .brand-title {
    font-size: 1rem;
  }

  .admin-main {
    padding: 14px;
  }

  .admin-user-badge {
    width: 100%;
    text-align: center;
  }

  .contact-item,
  .summary-item {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}

/* ===== Very small phones ===== */
@media (max-width: 380px) {
  .container {
    width: calc(100% - 16px);
  }

  .section {
    padding: 32px 0;
  }

  .hero {
    padding-top: 32px;
  }

  .hero-card .mini-grid {
    grid-template-columns: 1fr;
  }

  .btn {
    padding: 12px 16px;
    font-size: 0.95rem;
  }

  .brand {
    gap: 10px;
  }

  .brand-logo {
    width: 42px;
    height: 42px;
  }
}

/* ===== Large desktop ===== */
@media (min-width: 1440px) {
  .container {
    width: min(1500px, calc(100% - 60px));
  }

  .stats-strip {
      margin-top: 44px;
      grid-template-columns: repeat(4, 1fr);
    
  }
}

@media (min-width: 1920px) {
  .container {
    width: min(1700px, calc(100% - 80px));
  }
}