* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: #1c1c1c;
}

body {
  min-height: 100vh;
  background: url('../images/textur-gas-kvas-com-32ex-p-teksturi-neba-s-oblakami-1 1.jpg') center/cover fixed no-repeat;
  display: flex;
  flex-direction: column;
}

a {
  color: #1657d9;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 10px 25px rgba(0,0,0,.08);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-row {
  min-height: 92px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: #111;
}

.brand:hover {
  text-decoration: none;
}

.brand-logo {
  width: 64px;
  height: 64px;
  object-fit: contain;
}

.brand-title {
  font-size: 20px;
  font-weight: 700;
}

.brand-subtitle {
  font-size: 13px;
  color: #555;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.main-nav a {
  color: #111;
  font-weight: 600;
  padding: 10px 14px;
  border-radius: 12px;
}

.main-nav a.active,
.main-nav a:hover {
  background: #eef3ff;
  text-decoration: none;
}

.header-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: #f6f7fb;
  border-radius: 999px;
}

.user-chip img {
  width: 34px;
  height: 34px;
  border-radius: 50%;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  padding: 12px 22px;
  font-weight: 700;
  border: 1px solid #111;
  transition: .2s ease;
  cursor: pointer;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: #111;
  color: #fff;
}

.btn-primary:hover {
  color: #fff;
}

.btn-outline {
  background: #fff;
  color: #111;
}

.btn-full {
  width: 100%;
}

.hero {
  padding: 56px 0 80px;
}

.hero-card,
.card {
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(8px);
  border-radius: 28px;
  box-shadow: 0 18px 40px rgba(0,0,0,.12);
}

.hero-card {
  padding: 48px;
}

.hero-badge {
  display: inline-block;
  padding: 10px 16px;
  border: 1px solid #111;
  border-radius: 999px;
  margin-bottom: 18px;
  font-size: 14px;
  font-weight: 700;
}

.hero-card h1 {
  font-size: clamp(34px, 6vw, 68px);
  line-height: 1.02;
  margin: 0 0 18px;
}

.hero-card p {
  font-size: 20px;
  line-height: 1.6;
  max-width: 860px;
  color: #333;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin: 28px 0 34px;
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.hero-meta div {
  padding: 18px;
  background: rgba(255,255,255,.7);
  border-radius: 20px;
}

.hero-meta strong {
  display: block;
  font-size: 24px;
  margin-bottom: 6px;
}

.hero-meta span {
  color: #555;
}

.page-section {
  padding: 42px 0 70px;
}

.section-head {
  margin-bottom: 24px;
}

.section-head h1 {
  margin: 0 0 10px;
  font-size: clamp(30px, 4vw, 48px);
}

.section-head p,
.muted {
  color: #5a5a5a;
  line-height: 1.6;
}

.center { text-align: center; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.span-2 { grid-column: span 2; }

.auth-page {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 16px 72px;
  flex: 1;
}

.card-sm { max-width: 520px; }
.auth-card,
.form-card,
.admin-card { padding: 32px; }
.auth-card-wide { max-width: 860px; }

.auth-card h1,
.form-card h1 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 38px;
  text-align: center;
}

.auth-form,
.register-grid,
.admin-form-grid {
  display: grid;
  gap: 18px;
  margin-top: 22px;
}

.register-grid,
.admin-form-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

label {
  display: grid;
  gap: 8px;
  font-weight: 700;
}

input,
textarea {
  width: 100%;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid #cfd5e1;
  background: #fff;
  font-size: 16px;
}

textarea {
  resize: vertical;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.alert {
  border-radius: 14px;
  padding: 14px 16px;
  margin-top: 18px;
  font-weight: 700;
}

.alert-error {
  background: #ffe8e8;
  color: #9f2222;
}

.alert-success {
  background: #e8f8ec;
  color: #1d7b35;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.news-card {
  padding: 26px;
}

.news-card h2 {
  margin: 8px 0 12px;
  font-size: 24px;
  line-height: 1.3;
}

.news-date {
  color: #666;
  font-size: 14px;
  font-weight: 700;
}

.courses-list {
  display: grid;
  gap: 18px;
}

.course-row {
  display: grid;
  grid-template-columns: 150px 1fr 160px;
  gap: 22px;
  align-items: start;
  padding: 22px;
  border-radius: 24px;
  background: rgba(255,255,255,.88);
  color: #151515;
  box-shadow: 0 12px 28px rgba(0,0,0,.08);
}

.course-row:hover {
  text-decoration: none;
  transform: translateY(-2px);
}

.course-thumb-wrap {
  display: flex;
  justify-content: center;
}

.course-thumb {
  width: 140px;
  height: 140px;
  object-fit: cover;
  border-radius: 16px;
}

.course-main h2 {
  margin: 0;
  font-size: 34px;
  line-height: 1.2;
}

.course-topline {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.bundle-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 10px;
  border-radius: 10px;
  background: #e8f1ff;
  color: #2a5ec7;
  font-size: 13px;
  font-weight: 700;
}

.course-author {
  color: #666;
  font-size: 24px;
  margin-bottom: 12px;
}

.course-excerpt {
  color: #383838;
  font-size: 24px;
  line-height: 1.55;
  margin: 0 0 14px;
}

.course-meta-line {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  color: #666;
  font-size: 18px;
}

.course-side {
  text-align: right;
}

.course-old-price {
  color: #777;
  text-decoration: line-through;
  margin-bottom: 6px;
  font-size: 22px;
}

.course-price {
  color: #c35724;
  font-size: 34px;
  font-weight: 800;
  margin-bottom: 24px;
}

.course-link-text {
  color: #1657d9;
  font-weight: 700;
}

.course-single {
  padding: 28px;
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 28px;
}

.course-single-media img {
  width: 100%;
  border-radius: 24px;
  object-fit: cover;
}

.course-single-top {
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

.course-single-content h1 {
  font-size: 44px;
  margin: 0 0 8px;
}

.price-box { text-align: right; }

.course-meta-grid {
  margin: 26px 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.course-meta-grid div {
  background: #f5f7fb;
  border-radius: 18px;
  padding: 16px;
}

.course-meta-grid span {
  display: block;
  color: #666;
  margin-bottom: 6px;
}

.course-meta-grid strong {
  font-size: 20px;
}

.course-full-text {
  font-size: 18px;
  line-height: 1.8;
}

.empty-state {
  padding: 26px;
}

.admin-actions {
  margin-bottom: 18px;
}

.table-wrap {
  overflow-x: auto;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
}

.admin-table th,
.admin-table td {
  text-align: left;
  padding: 14px;
  border-bottom: 1px solid #e4e8f0;
  vertical-align: top;
}

.admin-table th {
  background: #f7f9fd;
}

.table-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.site-footer {
  margin-top: auto;
  background: rgba(255,255,255,.95);
  border-top: 1px solid rgba(0,0,0,.06);
}

.footer-row {
  padding: 18px 0;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  color: #555;
  font-size: 14px;
}

@media (max-width: 1100px) {
  .news-grid { grid-template-columns: 1fr; }
  .course-row { grid-template-columns: 120px 1fr; }
  .course-side { grid-column: 2; text-align: left; }
  .course-single { grid-template-columns: 1fr; }
  .course-meta-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 820px) {
  .header-row {
    flex-direction: column;
    align-items: stretch;
    padding: 16px 0;
  }

  .brand { justify-content: center; }
  .main-nav, .header-user { justify-content: center; }
  .hero-card { padding: 28px; }
  .hero-meta { grid-template-columns: 1fr; }
  .register-grid,
  .admin-form-grid { grid-template-columns: 1fr; }
  .span-2 { grid-column: span 1; }
  .course-row {
    grid-template-columns: 1fr;
  }
  .course-thumb-wrap { justify-content: flex-start; }
  .course-side { grid-column: auto; }
  .course-main h2 { font-size: 26px; }
  .course-author,
  .course-excerpt { font-size: 18px; }
}

@media (max-width: 520px) {
  .container { width: min(100% - 20px, 1200px); }
  .btn { width: 100%; }
  .form-actions { flex-direction: column; }
  .course-meta-grid { grid-template-columns: 1fr; }
  .footer-row { flex-direction: column; }
}