@import url('https://api.fontshare.com/v2/css?f[]=satoshi@700,500,400&display=swap');

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

:root {
  --primary:        #ea580c;
  --primary-hover:  #c2410c;
  --primary-bg:     #fff7ed;
  --primary-muted:  #fdba74;
  --primary-border: #fed7aa;
  --text:           #1c0a00;
  --text-muted:     #6b7280;
  --text-light:     #9ca3af;
  --bg:             #fffaf7;
  --surface:        #ffffff;
  --border:         #f3e8e0;
  --radius:         12px;
  --radius-sm:      8px;
  --shadow:         0 1px 3px rgba(234,88,12,0.08), 0 1px 2px rgba(0,0,0,0.06);
}

html { font-size: 16px; }
body {
  font-family: 'Satoshi', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
}

/* Layout */
.container { max-width: 480px; margin: 0 auto; padding: 0 20px; }

/* Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--primary-border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}
.navbar-brand {
  font-weight: 800;
  font-size: 20px;
  color: var(--text);
  letter-spacing: -0.5px;
  text-decoration: none;
}
.grade-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-bg);
  color: var(--primary);
  border: 1px solid var(--primary-border);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s;
}
.grade-btn:hover { background: var(--primary-border); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  border: none;
  transition: background 0.15s, opacity 0.15s;
  text-decoration: none;
}
.btn-primary {
  background: var(--primary);
  color: white;
  width: 100%;
}
.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  width: 100%;
}
.btn-secondary:hover { background: var(--primary-bg); }

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}
.card + .card { margin-top: 12px; }
.card-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--primary);
  margin-bottom: 8px;
}
.card-content { font-size: 15px; line-height: 1.6; color: var(--text); }

/* Upload zone */
.upload-zone {
  border: 2px dashed var(--primary-muted);
  border-radius: var(--radius);
  padding: 48px 24px;
  text-align: center;
  background: var(--primary-bg);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.upload-zone:hover, .upload-zone.dragover {
  border-color: var(--primary);
  background: var(--primary-border);
}
.upload-icon { font-size: 40px; margin-bottom: 12px; }
.upload-title { font-size: 16px; font-weight: 700; color: var(--primary); }
.upload-hint { font-size: 13px; color: var(--text-muted); margin-top: 4px; }

/* Uses counter */
.uses-counter {
  text-align: center;
  font-size: 13px;
  color: var(--text-light);
  padding: 12px 0 24px;
}
.uses-counter.warning { color: var(--primary); font-weight: 600; }

/* Inline grade picker */
.grade-picker-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-light);
  margin: 14px 0 8px;
  text-align: left;
}
.grade-select {
  width: 100%;
  padding: 10px 36px 10px 14px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: var(--surface);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23ea580c' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  margin-bottom: 16px;
  transition: border-color 0.15s;
}
.grade-select:focus {
  outline: none;
  border-color: var(--primary);
}

/* Section cards (result page) */
.section-card {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.section-card.visible { opacity: 1; transform: translateY(0); }

/* Canvas crop tool */
#crop-canvas {
  width: 100%;
  border-radius: var(--radius);
  touch-action: none;
  cursor: crosshair;
}
.crop-hint { font-size: 13px; color: var(--text-muted); text-align: center; margin: 8px 0 12px; }

/* Progress / streaming cursor */
.streaming-cursor::after {
  content: '▋';
  animation: blink 1s step-end infinite;
  color: var(--primary);
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

/* Markdown content within cards */
.card-content p { margin: 0 0 10px; }
.card-content p:last-child { margin-bottom: 0; }
.card-content ul {
  margin: 4px 0 10px;
  padding-left: 18px;
  list-style: disc;
}
.card-content ol {
  margin: 4px 0 10px;
  padding-left: 20px;
  list-style: decimal;
}
.card-content li {
  margin-bottom: 6px;
  line-height: 1.55;
  padding-left: 2px;
}
.card-content h4 {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--primary);
  margin: 14px 0 6px;
}
.card-content strong { font-weight: 700; }

/* Visualization block */
.viz-block {
  margin-top: 12px;
  padding: 14px;
  background: var(--primary-bg);
  border: 1px solid var(--primary-border);
  border-radius: var(--radius-sm);
  overflow-x: auto;
}

/* Wikipedia viz */
.wiki-img {
  width: 100%;
  max-height: 240px;
  object-fit: contain;
  border-radius: 8px;
  background: #fff;
  display: block;
}
.wiki-title {
  display: inline-block;
  margin-top: 10px;
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
}
.wiki-title:hover { text-decoration: underline; }
.wiki-extract {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.55;
  margin-top: 6px;
}

/* Print styles */
@media print {
  .navbar, .btn, .uses-counter { display: none !important; }
  .section-card { opacity: 1 !important; transform: none !important; page-break-inside: avoid; }
  body { background: white; color: black; }
}

/* Mobile tweaks */
@media (max-width: 480px) {
  .navbar { padding: 12px 16px; }
  .container { padding: 0 16px; }
}