:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --ink: #0f172a;
  --ink-muted: #475569;
  --brand: #3b49c7;
  --brand-deep: #2c38aa;
  --border: #dbe2f1;
  --star: #fbbf24;
  --error: #b91c1c;
  --success: #166534;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

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

.hidden {
  display: none !important;
}

.container {
  width: min(1120px, 92vw);
  margin: 0 auto;
}

.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar-inner {
  min-height: 74px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
}

.brand {
  text-decoration: none;
  color: var(--ink);
  font-size: 1.4rem;
  font-weight: 900;
}

.brand span {
  color: var(--brand);
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.user-pill {
  padding: 7px 12px;
  border-radius: 999px;
  background: #e9ecff;
  color: #23308f;
  font-weight: 700;
  font-size: 0.88rem;
}

.btn {
  border: 0;
  border-radius: 10px;
  padding: 10px 14px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s ease;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
}

.btn-primary:hover {
  background: var(--brand-deep);
}

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

.btn:focus-visible,
.back-link:focus-visible,
.card-link:focus-visible,
.input:focus-visible,
.textarea:focus-visible,
select.input:focus-visible,
.tab:focus-visible,
.close-btn:focus-visible {
  outline: 3px solid #1d4ed8;
  outline-offset: 2px;
}

.btn-danger {
  background: #b91c1c;
  color: #fff;
}

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

.page {
  padding-bottom: 42px;
}

.hero {
  margin-top: 24px;
  border-radius: 20px;
  padding: 34px 28px;
  background: linear-gradient(145deg, #3443c5, #202d96);
  color: #fff;
  box-shadow: var(--shadow);
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.7rem, 2.4vw, 2.4rem);
}

.hero p {
  margin: 10px 0 20px;
  max-width: 760px;
  color: #dbeafe;
}

.search-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
}

.input,
.textarea,
select.input {
  width: 100%;
  border: 1px solid #ccd6ea;
  border-radius: 10px;
  padding: 11px 12px;
  font-size: 0.95rem;
  color: var(--ink);
  background: #fff;
}

.input:focus,
.textarea:focus,
select.input:focus {
  border-color: var(--brand);
  outline: 2px solid #d9e0ff;
}

.panel {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.section {
  margin-top: 20px;
  padding: 20px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
}

.section-head h2 {
  margin: 0;
}

.section-head p {
  margin: 0;
  color: var(--ink-muted);
}

.grid-cards {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
}

.roommate-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  cursor: pointer;
}

.roommate-card:hover {
  border-color: #bdc8e7;
}

.roommate-card h3 {
  margin: 0;
  font-size: 1.05rem;
}

.roommate-card .school,
.roommate-card .count {
  margin: 8px 0 0;
  color: var(--ink-muted);
  font-size: 0.9rem;
}

.card-stats {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  font-weight: 700;
}

.card-rating {
  color: #111827;
}

.card-link {
  margin-top: 12px;
  border: 0;
  background: none;
  color: var(--brand);
  padding: 0;
  font-weight: 700;
  cursor: pointer;
}

.report-btn {
  margin-top: 8px;
  border: 1px solid #fca5a5;
  color: #991b1b;
  background: #fff;
  border-radius: 8px;
  padding: 6px 10px;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
}

.report-btn:hover {
  background: #fee2e2;
}

.review-actions {
  margin-top: 8px;
}

.stars {
  color: var(--star);
  letter-spacing: 1px;
}

.empty {
  margin: 14px 0 0;
  padding: 12px;
  border: 1px dashed #cbd5e1;
  border-radius: 10px;
  color: var(--ink-muted);
}

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

.sr-only {
  border: 0;
  clip: rect(0 0 0 0);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  width: 1px;
}

.back-link {
  border: 0;
  background: none;
  color: var(--brand);
  font-weight: 700;
  cursor: pointer;
  padding: 0;
}

.detail-score-row {
  margin-top: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.detail-average {
  font-weight: 900;
  font-size: 1.6rem;
}

.detail-action-row {
  margin: 14px 0 18px;
}

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

.review-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  background: #fff;
}

.review-top {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.review-card p {
  margin: 10px 0;
  line-height: 1.5;
}

.review-card small {
  color: var(--ink-muted);
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.58);
  display: grid;
  place-items: center;
  z-index: 90;
  padding: 20px;
}

.modal-card {
  width: min(560px, 95vw);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  box-shadow: var(--shadow);
  position: relative;
}

.close-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 30px;
  height: 30px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #fff;
  cursor: pointer;
  font-size: 1.2rem;
  line-height: 1;
}

.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
}

.tab {
  border: 1px solid var(--border);
  border-radius: 9px;
  background: #fff;
  padding: 8px 12px;
  cursor: pointer;
  font-weight: 700;
}

.tab.active {
  color: #fff;
  background: var(--brand);
  border-color: var(--brand);
}

.stack {
  display: grid;
  gap: 12px;
}

.stack label {
  display: grid;
  gap: 7px;
  font-weight: 600;
}

.textarea {
  resize: vertical;
}

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

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

@media (max-width: 840px) {
  .topbar-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 0;
  }

  .top-actions {
    flex-wrap: wrap;
  }

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

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