/* GPA Calculator Styles - Following Kitmodo Design System */

:root {
  --bg: #0b0d10;
  --card: #141820;
  --muted: #8fa3b8;
  --text: #e7eef6;
  --accent: #6aa3ff;
  --accent-2: #7bd389;
  --warn: #f7c948;
  --danger: #ff6b6b;
  --ok: #59d185;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --radius: 16px;
  --input-bg: #0f131a;
  --border: #222b36;
}

:root[data-theme="light"] {
  --bg: #f5f7fa;
  --card: #ffffff;
  --muted: #5a6b7f;
  --text: #1a1d23;
  --accent: #2b7de9;
  --accent-2: #2a9d5f;
  --warn: #8b6914;
  --danger: #d32f2f;
  --ok: #2e7d32;
  --shadow: 0 10px 30px rgba(0,0,0,.08);
  --input-bg: #f8f9fb;
  --border: #d1d9e3;
}

html, body { 
  height: 100%; 
}

body {
  margin: 0; 
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, 'Helvetica Neue', Arial;
  background: var(--bg);
  color: var(--text);
  transition: background .3s, color .3s;
}

.wrap { 
  max-width: 1200px; 
  margin: 0 auto; 
  padding: 24px; 
}

header { 
  display: grid; 
  gap: 8px; 
  margin: 12px 0 24px; 
}

h1 { 
  font-size: clamp(1.6rem, 2.6vw, 2.2rem); 
  margin: 0; 
  letter-spacing: .2px; 
}

h2 {
  font-size: 1.2rem;
  margin: 4px 0 16px;
  letter-spacing: .3px;
}

h3 {
  font-size: 1rem;
  margin: 12px 0 8px;
}

p.sub { 
  color: var(--muted); 
  margin: 0; 
}

.card { 
  background: var(--card); 
  border-radius: var(--radius); 
  box-shadow: var(--shadow); 
  padding: 20px; 
  margin-bottom: 16px;
}

.badge { 
  display: inline-block; 
  padding: 4px 10px; 
  border-radius: 999px; 
  background: #112134; 
  border: 1px solid #2a3b52; 
  color: var(--muted); 
  font-size: .82rem; 
}

/* Form Elements */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

@media (max-width: 768px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

.form-group {
  display: flex;
  flex-direction: column;
}

label {
  display: block;
  font-size: .9rem;
  color: var(--muted);
  margin-bottom: 6px;
  font-weight: 500;
}

.form-control,
input[type="text"],
input[type="number"],
select {
  width: 100%;
  background: var(--input-bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  font-size: 1rem;
  outline: none;
  box-sizing: border-box;
  transition: border-color .2s, box-shadow .2s;
}

.form-control:focus,
input:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(106,163,255,.2);
}

/* Buttons */
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

button {
  appearance: none;
  border: 0;
  padding: 10px 16px;
  border-radius: 12px;
  font-weight: 600;
  font-size: .95rem;
  cursor: pointer;
  transition: all .2s;
  box-shadow: var(--shadow);
}

.btn-primary {
  background: var(--accent);
  color: #071019;
}

.btn-primary:hover {
  background: #5a93ef;
  transform: translateY(-1px);
}

.btn-secondary {
  background: #1f2732;
  color: var(--text);
  border: 1px solid #2a3645;
}

.btn-secondary:hover {
  background: #2a3645;
}

.btn-danger {
  background: var(--danger);
  color: white;
  padding: 6px 12px;
  font-size: .85rem;
}

.btn-danger:hover {
  background: #e65555;
}

/* Toggle Buttons */
.toggle-group {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}

.toggle-btn {
  flex: 1;
  background: var(--input-bg);
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 10px 16px;
  border-radius: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all .2s;
}

.toggle-btn:hover {
  background: var(--border);
}

.toggle-btn.active {
  background: var(--accent);
  color: #071019;
  border-color: var(--accent);
}

/* Table Styles */
.table-container {
  overflow-x: auto;
  margin-bottom: 16px;
}

.courses-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--input-bg);
  border-radius: 12px;
  overflow: hidden;
}

.courses-table thead {
  background: var(--card);
  border-bottom: 2px solid var(--border);
}

.courses-table th {
  padding: 12px;
  text-align: left;
  font-weight: 600;
  font-size: .9rem;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
}

.courses-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

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

.courses-table tbody tr:hover {
  background: rgba(106, 163, 255, 0.05);
}

.courses-table input,
.courses-table select {
  width: 100%;
  padding: 8px 10px;
  font-size: .9rem;
}

/* Results Grid */
.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  text-align: center;
  transition: transform .2s;
}

.stat-card:hover {
  transform: translateY(-2px);
}

.stat-card.highlight {
  border-color: var(--accent);
  background: rgba(106, 163, 255, 0.1);
}

.stat-label {
  color: var(--muted);
  font-size: .9rem;
  margin-bottom: 8px;
  font-weight: 500;
}

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: .5px;
  margin-bottom: 4px;
}

.stat-detail {
  font-size: .85rem;
  color: var(--muted);
}

/* Notice Boxes */
.notice {
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  color: var(--muted);
  line-height: 1.6;
}

.notice.warn {
  border-color: #3a2d00;
  background: #141207;
  color: #f0e3b2;
}

.notice.success {
  border-color: #1a3d23;
  background: #0a1a0f;
  color: #b8e6c5;
}

.notice.error {
  border-color: #3d1a1a;
  background: #1a0a0a;
  color: #ffb8b8;
}

.notice strong {
  color: var(--text);
  display: block;
  margin-bottom: 6px;
}

/* Custom Scale Configuration */
.custom-scale {
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin: 16px 0;
}

.custom-scale-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr auto;
  gap: 10px;
  margin-bottom: 10px;
  align-items: end;
}

@media (max-width: 768px) {
  .custom-scale-row {
    grid-template-columns: 1fr;
  }
}

/* What-If Examples */
.what-if-examples {
  margin-top: 16px;
  padding: 16px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.what-if-examples h3 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 1rem;
}

.grade-mix-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 10px;
}

.grade-mix-item:last-child {
  margin-bottom: 0;
}

/* Utilities */
.muted {
  color: var(--muted);
  font-size: .92rem;
}

.text-center {
  text-align: center;
}

.mt-2 {
  margin-top: 16px;
}

.mb-2 {
  margin-bottom: 16px;
}

/* Footer */
footer {
  margin: 28px 0 8px;
  color: var(--muted);
  font-size: .9rem;
}

footer a {
  color: var(--accent-2);
  text-underline-offset: 3px;
}

.disclaimer {
  font-size: .9rem;
  line-height: 1.4;
}

.disclaimer-section {
  margin-top: 16px;
}

/* Inline Disclaimer */
.inline-disclaimer {
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 12px;
  padding: 14px;
  margin-top: 20px;
  color: var(--muted);
  line-height: 1.6;
}

.inline-disclaimer strong {
  color: var(--text);
}

.inline-disclaimer p {
  margin: 0;
}

/* FAQ Section */
.faq-section {
  margin-top: 16px;
}

.faq-item {
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
}

.faq-item:last-child {
  margin-bottom: 0;
}

.faq-question {
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 12px 0;
}

.faq-answer {
  color: var(--muted);
  line-height: 1.7;
}

.faq-answer p {
  margin: 0 0 12px 0;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
  .wrap {
    padding: 16px;
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.1rem;
  }

  .stat-value {
    font-size: 1.6rem;
  }

  .courses-table {
    font-size: .85rem;
  }

  .courses-table th,
  .courses-table td {
    padding: 8px;
  }
}

/* Print Styles */
@media print {
  .actions,
  .btn-danger,
  #header-placeholder,
  footer {
    display: none;
  }

  .card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ccc;
  }
}