:root {
  --bg: #222222;
  --panel: #2f2f2f;
  --panel-alt: #383838;
  --line: #5b4d3d;
  --text: #f3efe7;
  --muted: #d5c4a8;
  --accent: #f3a13b;
  --ok: #2c8f70;
  --warn: #cb7b1a;
  --danger: #b65757;
}

* {
  box-sizing: border-box;
}

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

a {
  color: var(--accent);
  text-decoration: none;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 16px 10px;
  background: #313131;
  border-bottom: 1px solid #474747;
}

.topbar h1 {
  margin: 4px 0 0;
  font-size: 1.35rem;
}

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

.topbar-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.nav-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  padding: 12px 16px 0;
}

.nav-pill,
.ghost-button,
.primary-button {
  border: 1px solid #686868;
  background: #454545;
  color: var(--text);
  border-radius: 12px;
  padding: 10px 12px;
  font-weight: 700;
}

.nav-pill.selected,
.ghost-button.active,
.primary-button {
  background: var(--accent);
  color: #111;
  border-color: #f0b96d;
}

.page-shell {
  padding: 16px;
}

.card,
.login-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px;
  margin-bottom: 16px;
}

.login-card {
  max-width: 420px;
  margin: 32px auto;
}

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

label {
  display: grid;
  gap: 6px;
  font-weight: 700;
}

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

input,
select,
textarea {
  width: 100%;
  background: #181818;
  color: var(--text);
  border: 1px solid #5a5a5a;
  border-radius: 12px;
  padding: 12px;
}

.flash {
  border-radius: 12px;
  padding: 12px;
  margin-bottom: 12px;
  border: 1px solid #6f6f6f;
  background: var(--panel-alt);
}

.flash.success {
  border-color: #4fa57f;
}

.flash.error {
  border-color: #c07070;
}

.assignment-chip,
.tiny-chip {
  display: grid;
  gap: 2px;
  padding: 12px;
  background: var(--accent, #5B8FF9);
  color: #fff;
  border-radius: 14px;
}

.tiny-chip {
  padding: 8px 10px;
  display: inline-block;
}

.list-card {
  display: grid;
  gap: 4px;
  background: var(--panel-alt);
  border: 1px solid #4f4f4f;
  border-radius: 14px;
  padding: 12px;
  margin-bottom: 10px;
}

.day-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.day-card,
.schedule-row {
  background: var(--panel-alt);
  border: 1px solid #4f4f4f;
  border-radius: 14px;
  padding: 12px;
}

.schedule-row {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 12px;
  margin-bottom: 10px;
}

.schedule-day,
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.stack-list {
  display: grid;
  gap: 10px;
}

.muted,
small {
  color: var(--muted);
}

.note-copy {
  margin: 4px 0 0;
}

@media (min-width: 900px) {
  .page-shell {
    max-width: 920px;
    margin: 0 auto;
  }

  .nav-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .day-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}