:root {
  --bg: #eef0f7;
  --surface: #ffffff;
  --surface-2: #f7f8fc;
  --border: #e3e6f0;
  --text: #161923;
  --text-secondary: #5b607a;
  --text-tertiary: #8d92a8;

  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-soft: #eef0fe;
  --primary-ring: #6366f1;

  --success: #15803d;
  --success-soft: #e3f7e9;
  --success-strong: #16a34a;

  --warning: #b45309;
  --warning-soft: #fef3e0;
  --warning-strong: #d97706;

  --danger: #b91c1c;
  --danger-soft: #fdeaea;
  --danger-strong: #dc2626;

  --neutral: #4b5065;
  --neutral-soft: #eaecf3;
  --neutral-strong: #6b7280;

  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 2px rgba(20, 24, 41, 0.05);
  --shadow: 0 1px 3px rgba(20, 24, 41, 0.06), 0 8px 24px -12px rgba(20, 24, 41, 0.14);
  --shadow-lg: 0 20px 45px -18px rgba(20, 24, 41, 0.35);
  --ring-track: #e5e7f2;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e1016;
    --surface: #171a24;
    --surface-2: #1d212c;
    --border: #272c3a;
    --text: #edeef5;
    --text-secondary: #a5aabf;
    --text-tertiary: #767c94;

    --primary: #818cf8;
    --primary-hover: #93a0fb;
    --primary-soft: rgba(129, 140, 248, 0.14);
    --primary-ring: #818cf8;

    --success: #4ade80;
    --success-soft: rgba(74, 222, 128, 0.12);
    --success-strong: #4ade80;

    --warning: #fbbf24;
    --warning-soft: rgba(251, 191, 36, 0.12);
    --warning-strong: #fbbf24;

    --danger: #f87171;
    --danger-soft: rgba(248, 113, 113, 0.12);
    --danger-strong: #f87171;

    --neutral: #a3a8bd;
    --neutral-soft: rgba(163, 168, 189, 0.12);
    --neutral-strong: #9aa0b8;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.35), 0 8px 24px -12px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 20px 45px -18px rgba(0, 0, 0, 0.6);
    --ring-track: #2a2f3e;
  }
}

:root[data-theme="dark"] {
  --bg: #0e1016;
  --surface: #171a24;
  --surface-2: #1d212c;
  --border: #272c3a;
  --text: #edeef5;
  --text-secondary: #a5aabf;
  --text-tertiary: #767c94;
  --primary: #818cf8;
  --primary-hover: #93a0fb;
  --primary-soft: rgba(129, 140, 248, 0.14);
  --primary-ring: #818cf8;
  --success: #4ade80;
  --success-soft: rgba(74, 222, 128, 0.12);
  --success-strong: #4ade80;
  --warning: #fbbf24;
  --warning-soft: rgba(251, 191, 36, 0.12);
  --warning-strong: #fbbf24;
  --danger: #f87171;
  --danger-soft: rgba(248, 113, 113, 0.12);
  --danger-strong: #f87171;
  --neutral: #a3a8bd;
  --neutral-soft: rgba(163, 168, 189, 0.12);
  --neutral-strong: #9aa0b8;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.35), 0 8px 24px -12px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 20px 45px -18px rgba(0, 0, 0, 0.6);
  --ring-track: #2a2f3e;
}

* { box-sizing: border-box; }

html { color-scheme: light dark; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Segoe UI Variable", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  transition: background 0.2s ease, color 0.2s ease;
}

svg { display: block; }

/* --- Topbar --- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.topbar-brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 15px; letter-spacing: -0.01em; }
.topbar-logo {
  display: flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; border-radius: 9px;
  background: linear-gradient(135deg, var(--primary), var(--primary-ring));
  color: #fff;
}
.topbar-logo svg { width: 17px; height: 17px; }

.icon-btn {
  display: flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-secondary);
  cursor: pointer;
}
.icon-btn:hover { background: var(--surface-2); color: var(--text); }
.icon-btn svg { width: 17px; height: 17px; }
.icon-btn .icon-moon { display: none; }
:root[data-theme="dark"] .icon-btn .icon-sun { display: none; }
:root[data-theme="dark"] .icon-btn .icon-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-btn .icon-sun { display: none; }
  :root:not([data-theme="light"]) .icon-btn .icon-moon { display: block; }
}

/* --- Page shell --- */

.page {
  max-width: 1120px;
  margin: 0 auto;
  padding: 28px 24px 90px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.muted { color: var(--text-tertiary); }

/* --- Hero --- */

.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: linear-gradient(155deg, var(--surface) 0%, var(--surface) 60%, var(--primary-soft) 130%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 26px 30px;
  flex-wrap: wrap;
}

.hero-profile { display: flex; align-items: center; gap: 18px; }

.avatar {
  flex-shrink: 0;
  width: 62px; height: 62px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--primary), #a78bfa);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; font-weight: 700;
  box-shadow: 0 8px 20px -8px rgba(79, 70, 229, 0.6);
}

.hero-info h1 { margin: 0 0 3px; font-size: 22px; letter-spacing: -0.01em; }
.hero-sub { margin: 0 0 10px; color: var(--text-secondary); font-size: 13.5px; }

.hero-tags { display: flex; flex-wrap: wrap; gap: 7px; }
.tag {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 10px;
}
.tag b { color: var(--text); font-weight: 600; }

.hero-ring { position: relative; width: 118px; height: 118px; flex-shrink: 0; }
.ring { width: 100%; height: 100%; transform: rotate(-90deg); }
.ring-track { fill: none; stroke: var(--ring-track); stroke-width: 10; }
.ring-progress {
  fill: none;
  stroke: url(#ringGradientFallback);
  stroke: var(--primary-ring);
  stroke-width: 10;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.6s cubic-bezier(0.65, 0, 0.35, 1);
}
.ring-label {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.ring-pct { font-size: 22px; font-weight: 800; letter-spacing: -0.02em; }
.ring-caption { font-size: 11px; color: var(--text-tertiary); text-transform: uppercase; letter-spacing: 0.06em; }

/* --- Stat grid --- */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 14px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.stat-top { display: flex; align-items: center; justify-content: space-between; }
.stat-icon {
  width: 34px; height: 34px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
}
.stat-icon svg { width: 17px; height: 17px; }
.stat-icon.icon-primary { background: var(--primary-soft); color: var(--primary); }
.stat-icon.icon-success { background: var(--success-soft); color: var(--success-strong); }
.stat-icon.icon-warning { background: var(--warning-soft); color: var(--warning-strong); }
.stat-icon.icon-neutral { background: var(--neutral-soft); color: var(--neutral-strong); }
.stat-value { font-size: 26px; font-weight: 800; letter-spacing: -0.02em; line-height: 1; }
.stat-label { font-size: 12.5px; color: var(--text-secondary); font-weight: 500; }
.stat-bar { height: 6px; border-radius: 999px; background: var(--surface-2); overflow: hidden; }
.stat-bar-fill { height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--primary), var(--primary-ring)); }

/* --- Panels --- */

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 22px 24px;
}
.panel-head { margin-bottom: 14px; }
.panel-head h2 {
  margin: 0 0 4px;
  font-size: 15.5px;
  display: flex;
  align-items: center;
  gap: 9px;
}
.panel-icon {
  width: 26px; height: 26px;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.panel-icon svg { width: 14px; height: 14px; }
.panel-icon.icon-primary { background: var(--primary-soft); color: var(--primary); }
.panel-icon.icon-warning { background: var(--warning-soft); color: var(--warning-strong); }
.panel-icon.icon-neutral { background: var(--neutral-soft); color: var(--neutral-strong); }
.breakdown-note { font-size: 12.5px; line-height: 1.5; margin: 6px 0 0; max-width: 68ch; }

.panel .courses-head-actions { display: flex; align-items: center; gap: 10px; }

/* --- Pending list --- */

.pending-list { display: flex; flex-direction: column; gap: 5px; }
.pending-item {
  display: grid;
  grid-template-columns: 118px 88px 1fr 60px;
  align-items: center;
  gap: 12px;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  border-left: 3px solid transparent;
  cursor: pointer;
}
.pending-item:hover { background: var(--surface-2); }
.pending-item.s-partial { border-left-color: var(--warning-strong); }
.pending-item.s-none { border-left-color: var(--neutral-strong); }
.pending-code { font-weight: 700; font-size: 13.5px; }
.pending-title { font-size: 13.5px; }
.pending-reasons { color: var(--warning); font-weight: 500; }
.pending-sem { color: var(--text-tertiary); font-size: 12px; text-align: right; }

.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
  width: fit-content;
}
.badge-complete { background: var(--success-soft); color: var(--success); }
.badge-partial { background: var(--warning-soft); color: var(--warning); }
.badge-none { background: var(--neutral-soft); color: var(--neutral); }

/* --- Pending breakdown cards --- */

.breakdown {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 14px;
}
.breakdown-col {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px 8px;
  background: var(--surface-2);
}
.breakdown-col-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.breakdown-col-head h3 { margin: 0; font-size: 13px; font-weight: 700; }
.breakdown-count {
  font-size: 12px; font-weight: 800;
  padding: 2px 9px; border-radius: 999px;
}
.breakdown-col[data-key="assignment"] .breakdown-count { background: var(--primary-soft); color: var(--primary); }
.breakdown-col[data-key="theory"] .breakdown-count { background: var(--warning-soft); color: var(--warning-strong); }
.breakdown-col[data-key="practical"] .breakdown-count { background: var(--danger-soft); color: var(--danger-strong); }

.breakdown-list { display: flex; flex-direction: column; gap: 2px; max-height: 230px; overflow-y: auto; padding-right: 2px; }
.breakdown-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px;
  padding: 7px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 12.5px;
}
.breakdown-item:hover { background: var(--surface); }
.breakdown-title { flex: 1; min-width: 110px; color: var(--text-secondary); }
.breakdown-detail { font-size: 11.5px; }

/* --- Semester accordion --- */

.semester-groups { display: flex; flex-direction: column; gap: 10px; }

.semester-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface-2);
}
.semester-card + .semester-card { margin-top: 0; }

.semester-card summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  user-select: none;
}
.semester-card summary::-webkit-details-marker { display: none; }

.semester-chevron {
  width: 18px; height: 18px;
  color: var(--text-tertiary);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}
.semester-card[open] .semester-chevron { transform: rotate(90deg); }

.semester-title { font-weight: 700; font-size: 14px; white-space: nowrap; }
.semester-cycle { color: var(--text-tertiary); font-weight: 500; font-size: 12.5px; }

.semester-progress { flex: 1; display: flex; align-items: center; gap: 10px; min-width: 140px; }
.semester-bar { flex: 1; height: 6px; border-radius: 999px; background: var(--border); overflow: hidden; }
.semester-bar-fill { height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--success-strong), #22c55e); }
.semester-credits { font-size: 12px; color: var(--text-tertiary); white-space: nowrap; font-variant-numeric: tabular-nums; }

.semester-card table { margin: 0; }
.table-wrap { overflow-x: auto; background: var(--surface); border-top: 1px solid var(--border); }

table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th {
  text-align: left;
  color: var(--text-tertiary);
  font-weight: 700;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
td { padding: 11px 14px; border-bottom: 1px solid var(--border); }
tbody tr { cursor: pointer; transition: background 0.12s ease; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--surface-2); }
.cell-code { font-weight: 700; }
.cell-muted { color: var(--text-tertiary); }

/* --- Buttons --- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  font: inherit;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.05s ease;
}
.btn svg { width: 15px; height: 15px; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); }
.btn-ghost { background: transparent; }
.btn-ghost:hover { background: var(--surface-2); }
.btn-danger { color: var(--danger-strong); border-color: var(--danger-soft); background: var(--danger-soft); }
.btn-danger:hover { filter: brightness(0.96); }

/* --- Dialog --- */

dialog {
  border: none;
  border-radius: var(--radius-lg);
  padding: 0;
  width: min(480px, 92vw);
  color: var(--text);
  background: var(--surface);
  box-shadow: var(--shadow-lg);
}
dialog::backdrop { background: rgba(10, 12, 20, 0.5); backdrop-filter: blur(2px); }

#courseForm { padding: 26px; display: flex; flex-direction: column; gap: 13px; }
#courseForm h3 { margin: 0 0 4px; font-size: 17px; }
#courseForm label { display: flex; flex-direction: column; gap: 5px; font-size: 12.5px; color: var(--text-secondary); font-weight: 500; }
#courseForm input, #courseForm select, #courseForm textarea {
  font: inherit;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  background: var(--surface-2);
}
#courseForm input:focus, #courseForm select:focus, #courseForm textarea:focus {
  outline: 2px solid var(--primary);
  outline-offset: 1px;
}
#courseForm input[readonly] { color: var(--text-tertiary); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-row-3 { grid-template-columns: 1fr 1fr 1fr; }

.dialog-actions { display: flex; align-items: center; gap: 8px; margin-top: 6px; }
.spacer { flex: 1; }

/* --- Scrollbars (webkit) --- */
.breakdown-list::-webkit-scrollbar { width: 6px; }
.breakdown-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 999px; }

/* --- Responsive --- */

/* --- Auth page --- */

.auth-body { display: flex; min-height: 100vh; align-items: center; justify-content: center; }

.auth-page { width: 100%; padding: 24px; display: flex; justify-content: center; }

.auth-card {
  width: 100%;
  max-width: 360px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  text-align: center;
}
.auth-card h1 { margin: 4px 0 0; font-size: 19px; }
.auth-sub { margin: 0 0 6px; font-size: 13px; }
.auth-card label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 12.5px;
  color: var(--text-secondary);
  font-weight: 500;
  text-align: left;
}
.auth-card input {
  font: inherit;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  background: var(--surface-2);
}
.auth-card input:focus { outline: 2px solid var(--primary); outline-offset: 1px; }
.auth-submit { width: 100%; justify-content: center; padding: 10px 14px; margin-top: 4px; }
.auth-error { color: var(--danger-strong); font-size: 12.5px; margin: 0; }

.input-with-action { position: relative; display: block; }
.input-with-action input { width: 100%; padding-right: 40px; }
.input-action-btn {
  position: absolute;
  top: 50%;
  right: 4px;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: none;
  background: transparent;
  color: var(--text-tertiary);
  cursor: pointer;
  border-radius: var(--radius-sm);
}
.input-action-btn:hover { color: var(--text-secondary); background: var(--border); }
.input-action-btn svg { width: 17px; height: 17px; }
.input-action-btn .icon-eye-off { display: none; }
.input-action-btn.is-active .icon-eye { display: none; }
.input-action-btn.is-active .icon-eye-off { display: block; }

/* --- Topbar auth actions --- */
.topbar-actions { display: flex; align-items: center; gap: 8px; }

@media (max-width: 720px) {
  .page { padding: 20px 14px 80px; }
  .hero { flex-direction: column; align-items: flex-start; }
  .hero-ring { align-self: center; }
  .pending-item { grid-template-columns: auto 1fr; grid-template-rows: auto auto; row-gap: 4px; }
  .pending-title { grid-column: 1 / -1; order: 3; }
  .pending-sem { display: none; }
  .semester-progress { min-width: 90px; }
  .semester-cycle { display: none; }
}