:root {
  --bg: #f4faf3;
  --surface: #ffffff;
  --surface-soft: #ecf9ee;
  --text: #1c2420;
  --muted: #68736c;
  --accent: #58cc02;
  --accent-dark: #44a000;
  --border: #e3eee4;
  --shadow: 0 8px 24px rgba(28, 36, 32, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
  padding: 1rem 1.4rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  margin: 1rem auto 0;
  width: min(1100px, calc(100% - 2rem));
  box-shadow: var(--shadow);
}

.logo-group {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.logo-group h1 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 800;
}

.logo-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-weight: 900;
  color: #ffffff;
  background: linear-gradient(140deg, #72e600, var(--accent-dark));
}

.eyebrow {
  margin: 0 0 0.15rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.eyebrow.green {
  color: var(--accent-dark);
}

.nav-stats {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.auth-status {
  font-size: 0.9rem;
}

.chip {
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.45rem 0.8rem;
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
}

.chip-label {
  color: var(--muted);
  font-size: 0.8rem;
}

.dashboard {
  width: min(1100px, 100%);
  margin: 0 auto;
  padding: 1.5rem;
}

.app-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 1rem;
  align-items: start;
}

.sidebar {
  position: sticky;
  top: 1rem;
  display: grid;
  gap: 0.55rem;
  padding: 0.8rem;
}

.sidebar-link {
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--text);
  border-radius: 10px;
  padding: 0.62rem 0.75rem;
  text-align: left;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease,
    transform 0.2s ease;
}

.sidebar-link:hover {
  border-color: #c8e8b2;
  background: #f8fff3;
}

.sidebar-link.active {
  border-color: var(--accent);
  background: #f0ffe6;
  box-shadow: 0 0 0 2px rgba(88, 204, 2, 0.2);
  transform: translateX(1px);
}

.sidebar-icon {
  width: 1.2rem;
  text-align: center;
}

.page-content {
  display: grid;
  gap: 1rem;
}

.page-grid {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
  gap: 1rem;
  align-items: start;
}

.page-main {
  display: grid;
  gap: 1rem;
}

.page-side {
  display: grid;
  gap: 1rem;
}

.page-section {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.22s ease, transform 0.22s ease;
}

.page-section.hidden {
  display: none;
}

.page-section.page-enter {
  opacity: 0;
  transform: translateY(8px);
}

.pro-compare-wrap {
  margin-top: 0.9rem;
  overflow-x: auto;
}

.pro-compare-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.pro-compare-table th,
.pro-compare-table td {
  text-align: left;
  padding: 0.6rem 0.65rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
}

.pro-compare-table th {
  background: #f5fced;
  font-weight: 700;
}

.pro-compare-table tr:last-child td {
  border-bottom: 0;
}

.dashboard-head h2 {
  margin: 0;
  font-size: clamp(1.35rem, 2.8vw, 2rem);
}

.continue-card {
  background: linear-gradient(165deg, #ffffff, #efffe4);
}

.continue-card h3 {
  margin: 0.1rem 0 0.45rem;
  font-size: clamp(1.2rem, 2vw, 1.45rem);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(180px, 1fr));
  gap: 1rem;
  margin: 1rem 0 1.25rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 1.1rem;
}

.stat-card h3 {
  margin: 0.4rem 0 0.3rem;
  font-size: 1.6rem;
}

.card-note {
  color: var(--muted);
  margin: 0;
  font-size: 0.88rem;
}

.main-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

.ai-learning-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.ai-card {
  background: linear-gradient(170deg, #ffffff, #f3ffec);
}

.ai-card h3 {
  margin: 0.2rem 0 0.6rem;
}

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

.section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.section-heading h3 {
  margin: 0;
}

.subject-list {
  display: grid;
  gap: 0.7rem;
  margin-top: 0.85rem;
}

.subject-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.75rem 0.85rem;
  background: #ffffff;
}

.subject-topline {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.subject-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.6rem;
}

.subject-input {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.62rem 0.8rem;
  font: inherit;
  color: var(--text);
  background: var(--surface);
}

.subject-input:focus {
  outline: 2px solid #b6e99c;
  border-color: var(--accent);
}

.subject-hint {
  margin-top: 0.8rem;
  font-size: 0.9rem;
}

.subject-select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #ffffff;
  padding: 0.75rem 0.85rem;
  text-align: left;
  font: inherit;
  cursor: pointer;
}

.subject-select.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(88, 204, 2, 0.15);
}

.unit-list {
  display: grid;
  gap: 0.7rem;
}

.notes-form,
.chat-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.6rem;
}

.lesson-container,
.quiz-container {
  margin-top: 1rem;
  display: grid;
  gap: 0.75rem;
}

.lesson-item,
.quiz-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.8rem;
  background: #ffffff;
}

.adaptive-row {
  margin-top: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.hint-keyword {
  border-bottom: 1px dashed var(--accent-dark);
  cursor: help;
  font-weight: 600;
}

.weak-header {
  margin-top: 1rem;
}

.weak-topics-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.weak-topic-pill {
  border-radius: 999px;
  padding: 0.25rem 0.65rem;
  font-size: 0.8rem;
  background: #fff4d6;
  color: #915c00;
}

.chat-messages {
  min-height: 220px;
  max-height: 320px;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.75rem;
  background: #ffffff;
  display: grid;
  gap: 0.5rem;
}

.guidance-card h4 {
  margin: 0.2rem 0 0.5rem;
}

.chat-bubble {
  border-radius: 12px;
  padding: 0.55rem 0.7rem;
  max-width: 92%;
}

.chat-user {
  margin-left: auto;
  background: #dcf9ca;
}

.chat-ai {
  margin-right: auto;
  background: #f3f4f6;
}

.unit-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.75rem 0.85rem;
  background: #ffffff;
}

.unit-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
}

.state-pill {
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 700;
}

.state-unlocked {
  background: #e6f7db;
  color: #2f6a00;
}

.state-locked {
  background: #f1f5f9;
  color: #64748b;
}

.subunit-list {
  margin: 0.5rem 0 0;
  padding-left: 1rem;
  color: var(--muted);
}

.unit-hint {
  margin-top: 0.8rem;
}

.progress-track {
  width: 100%;
  height: 10px;
  border-radius: 999px;
  background: #e9f4e8;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, #6de319, var(--accent));
}

.btn {
  border: 0;
  border-radius: 10px;
  padding: 0.62rem 0.95rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 0.95rem;
}

.navbar .btn {
  margin-top: 0;
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--accent-dark);
}

@media (max-width: 900px) {
  .app-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .sidebar-link {
    text-align: center;
  }

  .stats-grid {
    grid-template-columns: repeat(2, minmax(170px, 1fr));
  }

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

  .ai-learning-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 760px) {
  .navbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav-actions {
    width: 100%;
    justify-content: space-between;
  }

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

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

  .subject-form {
    grid-template-columns: 1fr;
  }

  .notes-form,
  .chat-form {
    grid-template-columns: 1fr;
  }
}