:root {
  --bg: #f6f8f6;
  --panel: #ffffff;
  --ink: #17211d;
  --muted: #66736d;
  --line: #dce4df;
  --primary: #0e766d;
  --primary-strong: #095c55;
  --secondary: #245b7c;
  --accent: #c9861a;
  --soft-primary: #e1f4ef;
  --soft-secondary: #e5f0f7;
  --soft-accent: #fff3d6;
  --danger: #b42318;
  --radius: 8px;
  --shadow: 0 18px 50px rgba(20, 36, 31, 0.11);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
}

[hidden] {
  display: none !important;
}

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

.auth-screen {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    linear-gradient(135deg, rgba(14, 118, 109, 0.12), rgba(36, 91, 124, 0.1)),
    var(--bg);
}

.auth-panel {
  width: min(520px, 100%);
  display: grid;
  gap: 20px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.auth-brand {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.auth-panel h1 {
  margin: 4px 0 8px;
  font-size: clamp(28px, 7vw, 42px);
  line-height: 1.05;
}

.auth-tabs,
.demo-users {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.auth-form {
  display: grid;
  gap: 12px;
}

.auth-form label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 700;
}

.auth-message {
  min-height: 20px;
  margin: 0;
  color: var(--danger);
  font-size: 0.88rem;
  font-weight: 700;
}

.demo-users {
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

button,
select {
  cursor: pointer;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 280px 1fr;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding: 24px;
  border-right: 1px solid var(--line);
  background: #fbfdfb;
}

.brand,
.profile-card,
.nav-item,
.metric-card,
.product-card,
.lesson-row,
.community-post,
.session-row {
  border-radius: var(--radius);
}

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

.brand-mark,
.avatar {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  color: #fff;
  background: var(--primary);
  font-weight: 800;
}

.brand small,
.profile-card small,
.muted,
.meta,
.eyebrow {
  color: var(--muted);
}

.nav-list {
  display: grid;
  gap: 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  color: var(--muted);
  border: 0;
  background: transparent;
  text-align: left;
}

.nav-item[aria-current="page"] {
  color: var(--ink);
  background: var(--soft-primary);
  font-weight: 700;
}

.nav-icon {
  width: 22px;
  text-align: center;
  color: var(--primary);
  font-weight: 800;
}

.profile-card,
.session-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.profile-card {
  margin-top: auto;
}

.session-card {
  min-height: 42px;
  padding: 6px 10px;
  border-radius: var(--radius);
}

.session-card .avatar {
  width: 32px;
  height: 32px;
  font-size: 0.86rem;
}

.session-card small {
  display: block;
  color: var(--muted);
}

.main {
  min-width: 0;
  padding: 28px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 20px;
}

.topbar h1,
.modal h2 {
  margin: 2px 0 0;
  line-height: 1.05;
  letter-spacing: 0;
}

.topbar h1 {
  max-width: 820px;
  font-size: clamp(22px, 3vw, 30px);
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}

.boot-splash {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 18px;
  background: var(--bg);
}

.skeleton-bar {
  width: 180px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(90deg, #e3eae6 25%, #f2f6f3 50%, #e3eae6 75%);
  background-size: 200% 100%;
  animation: shimmer 1.2s infinite;
}

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

.toasts {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 100;
  display: grid;
  gap: 8px;
}

.toast {
  max-width: 340px;
  padding: 12px 16px;
  border-radius: var(--radius);
  color: #fff;
  background: var(--primary-strong);
  box-shadow: var(--shadow);
  font-weight: 600;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.25s, transform 0.25s;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.toast.error {
  background: var(--danger);
}

.chip-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.chip {
  min-height: 36px;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--muted);
  font-weight: 700;
  font-size: 0.85rem;
}

.chip.active {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
}

.hero-card {
  display: grid;
  grid-template-columns: 280px 1fr;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  box-shadow: 0 8px 30px rgba(16, 40, 36, 0.06);
}

.hero-card .product-hero {
  min-height: 100%;
  margin: 0;
  border-radius: 0;
}

.hero-content {
  display: grid;
  gap: 10px;
  align-content: center;
  padding: 22px;
}

.hero-content h2 {
  margin: 0;
}

.section-title {
  margin: 8px 0 12px;
  font-size: 1.1rem;
}

.product-rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(230px, 1fr);
  gap: 14px;
  overflow-x: auto;
  padding-bottom: 6px;
}

.rail-card {
  display: grid;
  grid-template-rows: 110px 1fr;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
}

.rail-body {
  display: grid;
  gap: 8px;
  padding: 12px;
  align-content: start;
}

.empty-state {
  display: grid;
  gap: 10px;
  justify-items: center;
  padding: 36px 18px;
  text-align: center;
}

.empty-icon {
  font-size: 2rem;
}

.home-post {
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.post-badges {
  display: flex;
  gap: 6px;
  margin-left: auto;
}

.replies {
  display: grid;
  gap: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.reply {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.reply p {
  margin: 2px 0;
}

.avatar-small {
  width: 30px;
  height: 30px;
  font-size: 0.8rem;
}

.reply-form {
  display: flex;
  gap: 8px;
}

.reply-form input {
  flex: 1;
}

.eyebrow {
  margin: 0;
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.topbar-actions {
  display: flex;
  align-items: end;
  gap: 12px;
  flex-wrap: wrap;
}

.modal label,
.field {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  min-height: 42px;
  padding: 10px 12px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

textarea {
  min-height: 94px;
  resize: vertical;
}

.primary-button,
.secondary-button,
.ghost-button,
.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-weight: 800;
}

.primary-button {
  padding: 10px 15px;
  color: #fff;
  background: var(--primary);
}

.primary-button:hover {
  background: var(--primary-strong);
}

.secondary-button {
  padding: 10px 15px;
  color: var(--primary);
  border-color: var(--line);
  background: var(--panel);
}

.ghost-button {
  padding: 8px 10px;
  color: var(--secondary);
  background: transparent;
}

.icon-button {
  width: 38px;
  height: 38px;
  color: var(--muted);
  border-color: var(--line);
  background: var(--panel);
}

.quick-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(150px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.metric-card {
  padding: 16px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.metric-card strong {
  display: block;
  margin-top: 6px;
  font-size: 1.55rem;
}

.view {
  display: grid;
  gap: 20px;
}

.filters,
.split-layout,
.admin-layout {
  display: grid;
  gap: 14px;
}

.filters {
  grid-template-columns: minmax(220px, 1fr) repeat(3, minmax(140px, 190px));
  align-items: end;
}

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

.product-card,
.community-post,
.lesson-row,
.session-row,
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
}

.product-card {
  display: grid;
  grid-template-rows: 150px 1fr;
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(16, 40, 36, 0.06);
}

.cover {
  position: relative;
  display: flex;
  align-items: end;
  padding: 14px;
  color: #fff;
  background:
    linear-gradient(135deg, rgba(9, 92, 85, 0.9), rgba(36, 91, 124, 0.78)),
    var(--cover);
  background-size: cover;
  background-position: center;
}

.cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 20%, rgba(0, 0, 0, 0.32));
}

.cover span {
  position: relative;
  z-index: 1;
  font-weight: 900;
}

.product-hero {
  min-height: 170px;
  margin-bottom: 14px;
  border-radius: var(--radius);
}

.product-hero span {
  font-size: 1.1rem;
}

.product-content {
  display: grid;
  gap: 12px;
  padding: 16px;
}

.product-content h3,
.community-post h3,
.panel h2 {
  margin: 0;
}

.meta-row,
.card-actions,
.post-actions,
.tabs {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 5px 9px;
  border-radius: 999px;
  color: var(--secondary);
  background: var(--soft-secondary);
  font-size: 0.78rem;
  font-weight: 800;
}

.pill.accent {
  color: #7a4a00;
  background: var(--soft-accent);
}

.pill.primary {
  color: var(--primary-strong);
  background: var(--soft-primary);
}

.pill.success {
  color: #14532d;
  background: #dcfce7;
}

.value-list {
  display: grid;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.value-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 0.92rem;
}

.value-list li::before {
  content: "✓";
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  color: var(--primary-strong);
  background: var(--soft-primary);
  font-weight: 800;
  font-size: 0.75rem;
}

.nav-icon svg {
  width: 20px;
  height: 20px;
  display: block;
}

.primary-button,
.secondary-button,
.ghost-button,
.chip,
.product-card,
.rail-card {
  transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.product-card:hover,
.rail-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 34px rgba(16, 40, 36, 0.1);
}

.secondary-button:hover {
  background: var(--soft-primary);
}

.ghost-button:hover {
  background: var(--soft-secondary);
}

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

.lesson-progress-wrap {
  display: grid;
  gap: 4px;
  min-width: 220px;
}

.lesson-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) minmax(280px, 0.9fr);
  gap: 16px;
  align-items: start;
}

.lesson-main {
  display: grid;
  gap: 16px;
}

.player-placeholder {
  display: grid;
  place-items: center;
  align-content: center;
  gap: 12px;
  aspect-ratio: 16 / 9;
  border-radius: 12px;
  color: rgba(255, 255, 255, 0.92);
  background:
    linear-gradient(160deg, rgba(10, 24, 20, 0.92), rgba(10, 24, 20, 0.75)),
    var(--cover);
  text-align: center;
}

.player-icon {
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.35);
}

.player-icon svg {
  width: 24px;
  height: 24px;
  margin-left: 3px;
}

.lesson-info {
  display: grid;
  gap: 8px;
}

.lesson-info h2 {
  margin: 0;
}

.lesson-sidebar {
  position: sticky;
  top: 16px;
}

.lesson-item {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: transparent;
  text-align: left;
}

.lesson-item:hover {
  background: var(--soft-secondary);
}

.lesson-item.active {
  border-color: var(--primary);
  background: var(--soft-primary);
}

.lesson-check {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--line);
  color: var(--muted);
  background: var(--panel);
  font-size: 0.8rem;
  font-weight: 800;
}

.lesson-check.done {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
}

.lesson-item-body {
  display: grid;
  gap: 2px;
}

@media (max-width: 1060px) {
  .lesson-layout {
    grid-template-columns: 1fr;
  }

  .lesson-sidebar {
    position: static;
  }

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

  .hero-card .product-hero {
    min-height: 140px;
  }
}

.price {
  font-size: 1.35rem;
  font-weight: 900;
}

.split-layout {
  grid-template-columns: minmax(0, 1.6fr) minmax(280px, 0.8fr);
}

.panel {
  padding: 18px;
  border-radius: var(--radius);
}

.library-list,
.lesson-list,
.community-list,
.session-list {
  display: grid;
  gap: 10px;
}

.lesson-row,
.session-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 14px;
}

.progress {
  width: 100%;
  height: 9px;
  overflow: hidden;
  border-radius: 999px;
  background: #e8eeeb;
}

.progress span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--primary);
}

.community-post {
  display: grid;
  gap: 12px;
  padding: 16px;
  border-radius: var(--radius);
}

.post-author {
  display: flex;
  align-items: center;
  gap: 10px;
}

.comment-box {
  display: grid;
  gap: 10px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.admin-layout {
  grid-template-columns: 320px 1fr;
}

.admin-form {
  display: grid;
  gap: 12px;
}

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

.table-like table {
  width: 100%;
  border-collapse: collapse;
  min-width: 660px;
}

th,
td {
  padding: 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

th {
  color: var(--muted);
  font-size: 0.8rem;
  text-transform: uppercase;
}

.modal {
  width: min(560px, calc(100vw - 28px));
  padding: 0;
  border: 0;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.modal::backdrop {
  background: rgba(7, 19, 16, 0.5);
}

.modal-panel {
  position: relative;
  display: grid;
  gap: 14px;
  padding: 24px;
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
}

.modal-actions {
  display: flex;
  justify-content: end;
  gap: 10px;
}

.mobile-nav {
  display: none;
}

@media (max-width: 1060px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    display: none;
  }

  .main {
    padding: 20px 16px 86px;
  }

  .topbar {
    display: grid;
  }

  .quick-stats,
  .product-grid,
  .split-layout,
  .admin-layout {
    grid-template-columns: 1fr;
  }

  .filters {
    grid-template-columns: 1fr 1fr;
  }

  .mobile-nav {
    position: fixed;
    right: 12px;
    bottom: 12px;
    left: 12px;
    z-index: 20;
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: 1fr;
    gap: 4px;
    padding: 8px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow);
  }

  .mobile-nav .nav-item {
    display: grid;
    place-items: center;
    min-height: 50px;
    padding: 6px;
    font-size: 0.72rem;
    text-align: center;
  }

  .mobile-nav .nav-icon {
    width: auto;
  }
}

@media (max-width: 640px) {
  .topbar-actions,
  .modal-actions {
    width: 100%;
  }

  .topbar-actions > *,
  .modal-actions > * {
    flex: 1;
  }

  .filters {
    grid-template-columns: 1fr;
  }

  .lesson-row,
  .session-row {
    grid-template-columns: 1fr;
  }
}