:root {
    --bg: #f4f6fa;
    --surface: #ffffff;
    --surface2: #f0f2f7;
    --border: #dde1ea;
    --text: #1a1d2e;
    --text2: #5a5f7a;
    --text3: #9197b3;
    --accent: #2563eb;
    --accent-light: #eff4ff;
    --accent-dark: #1e4fc2;
    --success: #16a34a;
    --success-light: #f0fdf4;
    --danger: #dc2626;
    --danger-light: #fff1f1;
    --warning: #d97706;
    --warning-light: #fffbeb;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 2px 12px rgba(0,0,0,0.08);
  }
  [data-theme="dark"] {
    --bg: #0f1117;
    --surface: #1a1d2e;
    --surface2: #252840;
    --border: #2e3250;
    --text: #e8eaf6;
    --text2: #9197b3;
    --text3: #5a5f7a;
    --accent: #4f7ef8;
    --accent-light: #1a2240;
    --accent-dark: #7ba3fb;
    --success: #22c55e;
    --success-light: #0a2018;
    --danger: #f87171;
    --danger-light: #2a0d0d;
    --warning: #fbbf24;
    --warning-light: #2a1f05;
    --shadow: 0 2px 12px rgba(0,0,0,0.35);
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }

  /* smooth theme transition on everything */
  *, *::before, *::after {
    transition:
      background-color 0.4s ease,
      border-color 0.4s ease,
      color 0.4s ease,
      box-shadow 0.4s ease,
      fill 0.4s ease,
      stroke 0.4s ease;
  }
  /* but keep interaction transitions snappy */
  button, input, select, a {
    transition:
      background-color 0.4s ease,
      border-color 0.4s ease,
      color 0.4s ease,
      transform 0.15s ease,
      opacity 0.15s ease !important;
  }

  body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
  }
  [dir="rtl"] body {
    font-family: 'Segoe UI', 'Tahoma', 'Arial', system-ui, sans-serif;
  }

  /* ── Header ── */
  header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
    position: sticky;
    top: 0;
    z-index: 100;
  }
  .logo { display: flex; align-items: center; gap: 10px; }
  .logo-icon {
    width: 34px; height: 34px;
    background: var(--accent);
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: 13px; font-weight: 700; letter-spacing: -0.5px;
  }
  .logo-text { font-size: 15px; font-weight: 600; color: var(--text); letter-spacing: -0.3px; }
  .logo-sub { font-size: 11px; color: var(--text3); font-weight: 400; letter-spacing: 0.5px; text-transform: uppercase; }

  /* header right controls */
  .header-controls { display: flex; align-items: center; gap: 8px; }

  /* Language toggle */
  .lang-btn {
    height: 32px;
    padding: 0 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface2);
    color: var(--accent);
    cursor: pointer;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.5px;
    display: flex; align-items: center; gap: 5px;
  }
  .lang-btn:hover { background: var(--accent-light); }

  /* Theme toggle — SVG icon button */
  .theme-btn {
    width: 36px; height: 36px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface2);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    padding: 0;
  }
  .theme-btn:hover { background: var(--accent-light); }
  .theme-btn svg { width: 18px; height: 18px; display: block; }
  /* sun rays & moon — color controlled by accent */
  .theme-btn svg .icon-fill { fill: var(--accent); }
  .theme-btn svg .icon-stroke { stroke: var(--accent); fill: none; stroke-width: 1.8; stroke-linecap: round; }

  /* ── Main Layout ── */
  main { max-width: 780px; margin: 0 auto; padding: 32px 20px 60px; }

  /* ── Progress Bar ── */
  .progress-wrap { margin-bottom: 32px; }
  .progress-steps { display: flex; align-items: center; gap: 0; margin-bottom: 12px; }
  .step-dot {
    display: flex; flex-direction: column; align-items: center; gap: 6px;
    flex: 1; position: relative; cursor: pointer;
  }
  .step-dot:not(:last-child)::after {
    content: ''; position: absolute;
    top: 16px; left: calc(50% + 16px); right: calc(-50% + 16px);
    height: 2px; background: var(--border);
  }
  /* RTL Progress Line Fix */
  [dir="rtl"] .step-dot:not(:last-child)::after {
    right: calc(50% + 16px);
    left: calc(-50% + 16px);
  }
  .step-dot.done:not(:last-child)::after { background: var(--accent); }
  .dot-circle {
    width: 32px; height: 32px; border-radius: 50%;
    border: 2px solid var(--border); background: var(--surface);
    display: flex; align-items: center; justify-content: center;
    font-size: 13px; font-weight: 600; color: var(--text3);
    position: relative; z-index: 1;
  }
  .step-dot.active .dot-circle { border-color: var(--accent); background: var(--accent); color: #fff; }
  .step-dot.done .dot-circle   { border-color: var(--accent); background: var(--accent-light); color: var(--accent); }
  .step-dot.done:hover .dot-circle { background: var(--accent); color: #fff; }
  .dot-label { font-size: 11px; color: var(--text3); font-weight: 500; text-align: center; white-space: nowrap; }
  .step-dot.active .dot-label { color: var(--accent); }
  .step-dot.done .dot-label   { color: var(--text2); }

  /* ── Card ── */
  .card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 32px;
    box-shadow: var(--shadow);
  }
  .card-title { font-size: 20px; font-weight: 700; color: var(--text); margin-bottom: 4px; letter-spacing: -0.4px; }
  .card-sub { font-size: 14px; color: var(--text2); margin-bottom: 24px; line-height: 1.5; }

  /* ── Page transitions ── */
  .page { display: none; }
  .page.active { display: block; animation: fadeUp 0.28s ease; }
  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: translateY(0); }
  }

  /* ── Step 1 ── */
  .count-control {
    display: flex; align-items: center; gap: 0;
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    overflow: hidden; width: fit-content; margin: 8px 0 24px;
  }
  .count-btn {
    width: 44px; height: 44px; border: none; background: var(--surface2); color: var(--text);
    font-size: 20px; cursor: pointer; display: flex; align-items: center; justify-content: center;
    font-weight: 300;
  }
  .count-btn:hover { background: var(--accent-light); color: var(--accent); }
  .count-display {
    width: 64px; height: 44px; border: none;
    border-left: 1px solid var(--border); border-right: 1px solid var(--border);
    background: var(--surface); color: var(--text);
    font-size: 18px; font-weight: 600; text-align: center; outline: none;
  }
  .count-display::-webkit-inner-spin-button,
  .count-display::-webkit-outer-spin-button { -webkit-appearance: none; }

  /* ── Step 2 ── */
  .courses-grid {
    display: flex; flex-direction: column; gap: 10px;
    margin-bottom: 24px; max-height: 420px; overflow-y: auto; padding-right: 4px;
  }
  [dir="rtl"] .courses-grid { padding-right: 0; padding-left: 4px; }
  .courses-grid::-webkit-scrollbar { width: 4px; }
  .courses-grid::-webkit-scrollbar-track { background: var(--surface2); border-radius: 4px; }
  .courses-grid::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

  .course-row { display: grid; grid-template-columns: 28px 1fr 100px 130px; gap: 10px; align-items: center; }
  .course-num { font-size: 12px; font-weight: 600; color: var(--text3); text-align: center; }
  .col-headers { display: grid; grid-template-columns: 28px 1fr 100px 130px; gap: 10px; margin-bottom: 6px; }
  .col-hdr { font-size: 11px; font-weight: 600; color: var(--text3); text-transform: uppercase; letter-spacing: 0.6px; }

  .course-row input[type="text"],
  .course-row input[type="number"],
  .course-row select {
    height: 38px; border: 1px solid var(--border); border-radius: var(--radius-sm);
    background: var(--surface); color: var(--text); font-size: 14px; padding: 0 10px;
    outline: none; width: 100%;
  }
  .course-row input:focus, .course-row select:focus { border-color: var(--accent); }
  .course-row select option { background: var(--surface); color: var(--text); }

  /* ── Step 3 ── */
  .score-inputs { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 24px; }
  .score-field label { display: block; font-size: 13px; font-weight: 600; color: var(--text2); margin-bottom: 8px; }
  .score-field input {
    width: 100%; height: 48px; border: 1px solid var(--border); border-radius: var(--radius-sm);
    background: var(--surface); color: var(--text); font-size: 22px; font-weight: 600;
    padding: 0 14px; outline: none;
  }
  .score-field input:focus { border-color: var(--accent); }
  .score-hint { font-size: 12px; color: var(--text3); margin-top: 5px; }

  .formula-bar {
    background: var(--accent-light); border: 1px solid var(--accent);
    border-radius: var(--radius-sm); padding: 12px 16px; margin-bottom: 20px;
    font-size: 13px; color: var(--accent-dark);
    display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  }
  [data-theme="dark"] .formula-bar { color: var(--accent); }
  .formula-bar span { font-weight: 600; }

  /* ── Buttons ── */
  .btn-row { display: flex; gap: 10px; justify-content: flex-end; }
  [dir="rtl"] .btn-row { justify-content: flex-start; flex-direction: row-reverse; }
  .btn {
    height: 42px; padding: 0 22px; border-radius: var(--radius-sm);
    font-size: 14px; font-weight: 600; cursor: pointer; border: none;
    display: flex; align-items: center; gap: 7px;
  }
  .btn-primary { background: var(--accent); color: #fff; }
  .btn-primary:hover { background: var(--accent-dark); transform: translateY(-1px); }
  .btn-secondary { background: var(--surface2); color: var(--text2); border: 1px solid var(--border); }
  .btn-secondary:hover { background: var(--border); color: var(--text); }
  .btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

  /* ── Results ── */
  .result-hero {
    text-align: center; padding: 28px 0 24px;
    border-bottom: 1px solid var(--border); margin-bottom: 24px;
  }
  .result-label { font-size: 12px; font-weight: 600; color: var(--text3); letter-spacing: 1px; text-transform: uppercase; margin-bottom: 8px; }
  .result-score {
    font-size: 64px; font-weight: 800; letter-spacing: -3px; line-height: 1; margin-bottom: 6px;
    background: linear-gradient(135deg, var(--accent), #7c3aed);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  }
  .result-out-of { font-size: 14px; color: var(--text3); margin-bottom: 20px; }
  .score-breakdown { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; }
  .breakdown-pill {
    background: var(--surface2); border: 1px solid var(--border);
    border-radius: 20px; padding: 6px 16px; font-size: 13px; color: var(--text2);
  }
  .breakdown-pill strong { color: var(--text); }

  .result-meta { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 12px; margin-bottom: 28px; }
  .meta-card { background: var(--surface2); border-radius: var(--radius-sm); padding: 14px 16px; text-align: center; }
  .meta-val { font-size: 22px; font-weight: 700; color: var(--text); letter-spacing: -0.5px; }
  .meta-lbl { font-size: 11px; color: var(--text3); font-weight: 500; margin-top: 3px; text-transform: uppercase; letter-spacing: 0.5px; }

  .section-head {
    display: flex; align-items: center; gap: 8px;
    font-size: 14px; font-weight: 700; margin-bottom: 12px;
    padding-bottom: 10px; border-bottom: 1px solid var(--border);
  }
  .section-head .dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
  .dot-green { background: var(--success); }
  .dot-red   { background: var(--danger); }

  .college-list { display: flex; flex-direction: column; gap: 6px; margin-bottom: 24px; }
  .college-item {
    display: flex; align-items: center; justify-content: space-between;
    padding: 11px 14px; border-radius: var(--radius-sm);
    border: 1px solid var(--border); background: var(--surface);
  }
  .college-item:hover { border-color: var(--accent); background: var(--accent-light); }
  .college-item.unavail:hover { border-color: var(--danger); background: var(--danger-light); }
  .college-name { font-size: 14px; font-weight: 500; color: var(--text); }
  .college-right { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
  .college-min { font-size: 12px; color: var(--text3); }
  .badge { font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 20px; }
  .badge-green { background: var(--success-light); color: var(--success); }
  .badge-red   { background: var(--danger-light);  color: var(--danger); }

  .restart-wrap { text-align: center; margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--border); }

  .err-msg { font-size: 12px; color: var(--danger); margin-top: 6px; display: none; }
  .copyright {
  text-align: center;
  font-size: 12px;
  color: var(--text3);
  margin-top: 32px;
  letter-spacing: 0.5px;
}
/* إعدادات اللوجو للوضع الفاتح والداكن */
.logo-dark-img {
  display: none;
}
.logo-light-img {
  display: block;
}

[data-theme="dark"] .logo-light-img {
  display: none;
}
[data-theme="dark"] .logo-dark-img {
  display: block;
}
.note-text {
    font-size: 12px;
    color: var(--text3);
    margin-bottom: 24px;
    text-align: left;
  }
  [dir="rtl"] .note-text {
    text-align: right;
  }
  @media (max-width: 540px) {
    .course-row { grid-template-columns: 22px 1fr 72px 105px; gap: 7px; }
    .col-headers { grid-template-columns: 22px 1fr 72px 105px; gap: 7px; }
    .score-inputs { grid-template-columns: 1fr; }
    .result-meta { grid-template-columns: 1fr 1fr; }
    main { padding: 20px 12px 40px; }
    .card { padding: 20px 16px; }
    .result-score { font-size: 52px; }
    .header-controls { gap: 5px; }
    .lang-btn { padding: 0 8px; font-size: 11px; }
  }