:root {
  --bg: #f5f9f7;
  --surface: #ffffff;
  --text: #1c2a2a;
  --muted: #607274;
  --border: #d8e5df;

  --week1-bg: #f5edff;
  --week1-border: #dcc8ff;
  --week1-accent: #7d53c7;

  --week2-bg: #eaf9ed;
  --week2-border: #bde8c4;
  --week2-accent: #2f8a47;

  --shadow-sm: 0 6px 24px rgba(37, 73, 64, 0.08);
  --shadow-lg: 0 20px 60px rgba(21, 41, 36, 0.24);
  --radius-lg: 18px;
  --radius-md: 14px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Manrope", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 0% 0%, #d9f3e8 0%, transparent 36%),
    radial-gradient(circle at 100% 100%, #efe7ff 0%, transparent 32%),
    var(--bg);
}

.page-wrap {
  width: min(1100px, 92vw);
  margin: 40px auto 72px;
}

.hero {
  margin-bottom: 28px;
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #4f6f67;
  font-weight: 700;
  font-size: 0.78rem;
}

h1 {
  margin: 10px 0 8px;
  font-size: clamp(1.8rem, 3.5vw, 2.7rem);
}

.subtitle {
  margin: 0;
  color: var(--muted);
  max-width: 72ch;
}

.week-section {
  margin: 26px 0 14px;
}

.week-toggle-btn {
  width: 100%;
  border: 1px solid transparent;
  border-radius: 12px;
  background: #ffffff;
  box-shadow: var(--shadow-sm);
  padding: 12px 14px;
  margin-bottom: 14px;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 800;
  cursor: pointer;
  transition: transform 150ms ease, box-shadow 150ms ease;
}

.week-toggle-btn:hover,
.week-toggle-btn:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(44, 71, 58, 0.12);
  outline: none;
}

.week-toggle-btn.active-week {
  box-shadow: 0 12px 30px rgba(44, 71, 58, 0.16);
  transform: translateY(-2px);
}

.week-toggle-btn.week-1-label {
  border-color: var(--week1-border);
  background: #f8f2ff;
  color: var(--week1-accent);
}

.week-toggle-btn.week-2-label {
  border-color: var(--week2-border);
  background: #f1fbf3;
  color: var(--week2-accent);
}

.curriculum-grid.hidden-grid {
  display: none;
}

.curriculum-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 14px;
}

.day-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
  text-align: left;
  cursor: pointer;
  min-height: 170px;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.day-card:hover,
.day-card:focus-visible {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(44, 71, 58, 0.12);
  outline: none;
}

.day-card.week-1 {
  background: var(--week1-bg);
  border-color: var(--week1-border);
}

.day-card.week-2 {
  background: var(--week2-bg);
  border-color: var(--week2-border);
}

.day-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  width: fit-content;
  padding: 4px 10px;
  font-size: 0.78rem;
  font-weight: 800;
}

.day-card.week-1 .day-pill {
  background: #e5d4ff;
  color: #5b33a6;
}

.day-card.week-2 .day-pill {
  background: #d3f2db;
  color: #266e39;
}

.day-title {
  margin: 0;
  font-size: 1rem;
}

.day-desc {
  margin: 0;
  color: #4e6361;
  line-height: 1.4;
  font-size: 0.94rem;
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(17, 24, 23, 0.55);
  display: grid;
  place-items: center;
  padding: 16px;
  z-index: 20;
}

.hidden {
  display: none;
}

.modal-panel {
  width: min(720px, 100%);
  max-height: min(90vh, 900px);
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-head {
  padding: 14px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
}

.modal-head h3 {
  margin: 0;
  font-size: 1rem;
}

.icon-btn {
  border: 0;
  background: #e5efeb;
  color: #27423d;
  border-radius: 8px;
  width: 34px;
  height: 34px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 800;
}

.chat-history {
  padding: 16px;
  overflow: auto;
  min-height: 290px;
  max-height: 48vh;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: #f9fcfb;
}

.bubble {
  padding: 10px 12px;
  border-radius: 12px;
  max-width: 80%;
  line-height: 1.35;
  font-size: 0.94rem;
}

.bubble.user {
  margin-left: auto;
  background: #dff3e4;
}

.bubble.tutor {
  margin-right: auto;
  background: #ebe4fa;
}

.chat-input-row {
  display: flex;
  gap: 10px;
  padding: 12px;
  border-top: 1px solid var(--border);
  background: #ffffff;
}

#chatInput {
  flex: 1;
  border: 1px solid #c9dbd5;
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
}

#chatInput:focus-visible {
  outline: 2px solid #8cbeb0;
  outline-offset: 1px;
}

.send-btn {
  border: 0;
  border-radius: 10px;
  padding: 10px 16px;
  font-weight: 700;
  background: #205a4d;
  color: white;
  cursor: pointer;
}

@media (max-width: 720px) {
  .page-wrap {
    margin-top: 26px;
  }

  .day-card {
    min-height: 158px;
  }

  .chat-history {
    min-height: 250px;
    max-height: 42vh;
  }
}