@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=DM+Mono:wght@300;400;500&display=swap');

  :root {
    --bg: #0a0c10;
    --surface: #111318;
    --surface2: #1a1d26;
    --border: #252836;
    --accent: #4fffb0;
    --accent2: #7c6dff;
    --accent3: #ff6b6b;
    --gold: #ffd166;
    --text: #eef0f7;
    --muted: #7a7f99;
    --radius: 16px;
    --font-head: 'Syne', sans-serif;
    --font-mono: 'DM Mono', monospace;
  }

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

  html { scroll-behavior: smooth; }

  body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-mono);
    min-height: 100vh;
    overflow-x: hidden;
  }

  /* BG GRID */
  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
      linear-gradient(rgba(79,255,176,0.03) 1px, transparent 1px),
      linear-gradient(90deg, rgba(79,255,176,0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
    z-index: 0;
  }

  /* HEADER */
  header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10,12,16,0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 0 clamp(16px, 5vw, 64px);
  }

  .header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 16px;
  }

  .logo {
    font-family: var(--font-head);
    font-weight: 800;
    font-size: 1.1rem;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text);
  }

  .logo-icon {
    width: 36px; height: 36px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 18px;
  }

  .logo span { color: var(--accent); }

  nav { display: flex; gap: 8px; flex-wrap: wrap; }

  nav a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.75rem;
    padding: 6px 12px;
    border-radius: 8px;
    transition: all 0.2s;
    border: 1px solid transparent;
  }

  nav a:hover {
    color: var(--accent);
    border-color: rgba(79,255,176,0.2);
    background: rgba(79,255,176,0.05);
  }

  /* HERO */
  .hero {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: clamp(48px, 10vw, 100px) clamp(16px, 5vw, 64px) clamp(32px, 6vw, 64px);
    max-width: 1200px;
    margin: 0 auto;
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(79,255,176,0.08);
    border: 1px solid rgba(79,255,176,0.2);
    border-radius: 100px;
    padding: 6px 16px;
    font-size: 0.72rem;
    color: var(--accent);
    margin-bottom: 24px;
    letter-spacing: 1px;
    text-transform: uppercase;
  }

  .hero-badge::before {
    content: '';
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--accent);
    animation: pulse 2s infinite;
  }

  @keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(1.4); }
  }

  h1 {
    font-family: var(--font-head);
    font-weight: 800;
    font-size: clamp(2rem, 6vw, 4rem);
    line-height: 1.1;
    letter-spacing: -1.5px;
    margin-bottom: 20px;
  }

  h1 em { font-style: normal; color: var(--accent); }

  .hero-sub {
    color: var(--muted);
    font-size: clamp(0.85rem, 2vw, 1rem);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.7;
  }

  .hero-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-bottom: 16px;
  }

  .tag {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 4px 12px;
    font-size: 0.7rem;
    color: var(--muted);
    transition: all 0.2s;
  }

  .tag:hover { color: var(--accent); border-color: rgba(79,255,176,0.3); }

  /* SECTION */
  section {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(24px, 4vw, 48px) clamp(16px, 5vw, 64px);
  }

  .section-label {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 32px;
  }

  .section-label h2 {
    font-family: var(--font-head);
    font-weight: 700;
    font-size: clamp(1.3rem, 3vw, 1.9rem);
    letter-spacing: -0.5px;
  }

  .section-label .pill {
    background: rgba(79,255,176,0.1);
    border: 1px solid rgba(79,255,176,0.2);
    color: var(--accent);
    border-radius: 100px;
    font-size: 0.65rem;
    padding: 3px 10px;
    letter-spacing: 1px;
    text-transform: uppercase;
  }

  /* CARDS GRID */
  .cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 20px;
  }

  .card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
    position: relative;
    overflow: hidden;
  }

  .card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--card-accent, var(--accent)), transparent);
    opacity: 0;
    transition: opacity 0.3s;
  }

  .card:hover { transform: translateY(-4px); border-color: rgba(79,255,176,0.2); box-shadow: 0 20px 60px rgba(0,0,0,0.4); }
  .card:hover::before { opacity: 1; }

  .card-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 24px;
  }

  .card-icon {
    width: 48px; height: 48px;
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
  }

  .card-title { font-family: var(--font-head); font-weight: 700; font-size: 1.05rem; }
  .card-desc { color: var(--muted); font-size: 0.72rem; margin-top: 2px; line-height: 1.5; }

  /* FORM ELEMENTS */
  .form-group { margin-bottom: 16px; }

  label {
    display: block;
    font-size: 0.7rem;
    color: var(--muted);
    margin-bottom: 6px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
  }

  input, select {
    width: 100%;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    padding: 10px 14px;
    outline: none;
    transition: border-color 0.2s;
    appearance: none;
  }

  input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(79,255,176,0.08); }

  input::placeholder { color: var(--muted); }

  .row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

  .btn {
    width: 100%;
    padding: 13px;
    border-radius: 10px;
    border: none;
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
    letter-spacing: 0.5px;
    margin-top: 8px;
  }

  .btn-primary {
    background: linear-gradient(135deg, var(--accent), #22c776);
    color: #0a0c10;
  }

  .btn-primary:hover { transform: scale(1.02); box-shadow: 0 8px 24px rgba(79,255,176,0.3); }
  .btn-primary:active { transform: scale(0.98); }

  .btn-secondary {
    background: var(--surface2);
    color: var(--accent);
    border: 1px solid rgba(79,255,176,0.2);
    margin-top: 8px;
  }

  .btn-secondary:hover { background: rgba(79,255,176,0.06); }

  /* RESULT BOX */
  .result-box {
    margin-top: 20px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    display: none;
    animation: fadeUp 0.3s ease;
  }

  .result-box.show { display: block; }

  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .result-main {
    font-family: var(--font-head);
    font-weight: 800;
    font-size: 2.4rem;
    letter-spacing: -1px;
    line-height: 1;
    margin-bottom: 4px;
  }

  .result-label { font-size: 0.7rem; color: var(--muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 12px; }

  .result-note {
    font-size: 0.78rem;
    color: var(--muted);
    line-height: 1.6;
    padding-top: 12px;
    border-top: 1px solid var(--border);
  }

  .grade-pill {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 100px;
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 0.85rem;
    margin-left: 10px;
    vertical-align: middle;
  }

  .grade-A { background: rgba(79,255,176,0.15); color: var(--accent); border: 1px solid rgba(79,255,176,0.3); }
  .grade-B { background: rgba(124,109,255,0.15); color: var(--accent2); border: 1px solid rgba(124,109,255,0.3); }
  .grade-C { background: rgba(255,209,102,0.15); color: var(--gold); border: 1px solid rgba(255,209,102,0.3); }
  .grade-D { background: rgba(255,107,107,0.1); color: #ff9a6b; border: 1px solid rgba(255,150,107,0.3); }
  .grade-F { background: rgba(255,107,107,0.15); color: var(--accent3); border: 1px solid rgba(255,107,107,0.3); }

  /* WEIGHTED GRADE ROWS */
  .wg-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr auto;
    gap: 8px;
    align-items: end;
    margin-bottom: 10px;
  }

  .wg-row input { margin-bottom: 0; }

  .del-btn {
    width: 36px; height: 36px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--surface2);
    color: var(--accent3);
    cursor: pointer;
    font-size: 16px;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.2s;
    flex-shrink: 0;
    margin-bottom: 0;
    align-self: flex-end;
  }

  .del-btn:hover { background: rgba(255,107,107,0.1); border-color: var(--accent3); }

  .add-btn {
    background: transparent;
    border: 1px dashed var(--border);
    color: var(--muted);
    border-radius: 10px;
    padding: 10px;
    width: 100%;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    transition: all 0.2s;
    margin-bottom: 16px;
  }

  .add-btn:hover { border-color: var(--accent); color: var(--accent); background: rgba(79,255,176,0.04); }

  /* DIVIDER */
  .wg-header {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr auto;
    gap: 8px;
    margin-bottom: 6px;
  }

  .wg-header span {
    font-size: 0.65rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }

  /* STATS ROW */
  .stats-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 16px;
  }

  .stat-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px 12px;
    text-align: center;
  }

  .stat-val {
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--accent);
  }

  .stat-lbl { font-size: 0.65rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.5px; margin-top: 2px; }

  /* GPA TABLE */
  .gpa-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.78rem;
    margin-top: 12px;
  }

  .gpa-table th {
    text-align: left;
    padding: 8px 10px;
    color: var(--muted);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border);
  }

  .gpa-table td {
    padding: 8px 10px;
    border-bottom: 1px solid rgba(37,40,54,0.5);
  }

  .gpa-table tr:last-child td { border-bottom: none; }

  .gpa-table tr:hover td { background: rgba(79,255,176,0.03); }

  /* PROGRESS BAR */
  .progress-wrap { margin: 12px 0; }
  .progress-bar {
    height: 6px;
    background: var(--surface2);
    border-radius: 100px;
    overflow: hidden;
    border: 1px solid var(--border);
  }

  .progress-fill {
    height: 100%;
    border-radius: 100px;
    transition: width 0.6s cubic-bezier(0.4,0,0.2,1);
    background: linear-gradient(90deg, var(--accent), var(--accent2));
  }

  /* FEATURES */
  .features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-top: 16px;
  }

  .feature-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    transition: all 0.2s;
  }

  .feature-item:hover { border-color: rgba(79,255,176,0.2); transform: translateY(-2px); }

  .feature-icon {
    font-size: 22px;
    flex-shrink: 0;
    margin-top: 2px;
  }

  .feature-text h3 {
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 0.85rem;
    margin-bottom: 4px;
  }

  .feature-text p { font-size: 0.72rem; color: var(--muted); line-height: 1.5; }

  /* FAQ */
  .faq-list { display: flex; flex-direction: column; gap: 12px; }

  .faq-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: border-color 0.2s;
  }

  .faq-item:hover { border-color: rgba(79,255,176,0.2); }

  .faq-q {
    padding: 16px 20px;
    cursor: pointer;
    font-family: var(--font-head);
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    user-select: none;
  }

  .faq-q::after {
    content: '+';
    font-size: 1.4rem;
    color: var(--accent);
    transition: transform 0.2s;
    flex-shrink: 0;
  }

  .faq-item.open .faq-q::after { transform: rotate(45deg); }

  .faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    font-size: 0.8rem;
    color: var(--muted);
    line-height: 1.7;
  }

  .faq-item.open .faq-a { max-height: 200px; }

  .faq-a-inner { padding: 0 20px 16px; }

  /* FOOTER */
  footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--border);
    padding: clamp(32px, 4vw, 56px) clamp(16px, 5vw, 64px);
    text-align: center;
    margin-top: 40px;
  }

  .footer-inner { max-width: 1200px; margin: 0 auto; }

  .footer-logo {
    font-family: var(--font-head);
    font-weight: 800;
    font-size: 1.2rem;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
  }

  .footer-logo em { font-style: normal; color: var(--accent); }

  footer p { color: var(--muted); font-size: 0.75rem; line-height: 1.7; max-width: 500px; margin: 0 auto 20px; }

  .footer-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; margin-bottom: 24px; }

  .footer-links a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.75rem;
    transition: color 0.2s;
  }

  .footer-links a:hover { color: var(--accent); }

  .footer-copy { font-size: 0.7rem; color: rgba(122,127,153,0.5); }

  /* COLOR VARIANTS */
  .card-purple { --card-accent: var(--accent2); }
  .card-gold { --card-accent: var(--gold); }
  .card-red { --card-accent: var(--accent3); }
  .card-teal { --card-accent: var(--accent); }

  .icon-teal { background: rgba(79,255,176,0.12); }
  .icon-purple { background: rgba(124,109,255,0.12); }
  .icon-gold { background: rgba(255,209,102,0.12); }
  .icon-red { background: rgba(255,107,107,0.12); }

  /* SCROLL TO TOP */
  #scroll-top {
    position: fixed;
    bottom: 24px; right: 24px;
    width: 44px; height: 44px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
    font-size: 18px;
    transition: all 0.2s;
    z-index: 99;
    opacity: 0;
    transform: translateY(10px);
    pointer-events: none;
  }

  #scroll-top.show { opacity: 1; transform: translateY(0); pointer-events: auto; }
  #scroll-top:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

  /* RESPONSIVE */
  @media (max-width: 640px) {
    nav { display: none; }
    .row-2 { grid-template-columns: 1fr; }
    .wg-row { grid-template-columns: 1fr 1fr; }
    .wg-row .del-btn { grid-column: span 2; }
    .wg-header { grid-template-columns: 1fr 1fr; }
    .stats-row { grid-template-columns: 1fr 1fr; }
    .cards-grid { grid-template-columns: 1fr; }
  }

  /* DIVIDER LINE */
  .divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 8px 0 20px;
  }

  /* TOOLTIP */
  [data-tip] { position: relative; cursor: help; }
  [data-tip]::after {
    content: attr(data-tip);
    position: absolute;
    bottom: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 6px 10px;
    font-size: 0.68rem;
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 50;
    color: var(--text);
  }
  [data-tip]:hover::after { opacity: 1; }