/* === 9Baht.app Shared Design System === */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+Thai:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --primary: #6c3aed; --primary-light: #8b5cf6; --primary-dark: #5b21b6;
  --bg: #f0f2ff; --bg-card: #ffffff; --bg-dark: #1e1b4b;
  --text: #1e293b; --text-secondary: #64748b; --text-light: #94a3b8;
  --border: #e2e8f0; --success: #10b981; --error: #ef4444; --warning: #f59e0b;
  --radius: 16px; --radius-sm: 10px; --radius-xs: 6px;
  --shadow: 0 4px 24px rgba(108,58,237,0.08); --shadow-lg: 0 8px 40px rgba(108,58,237,0.12);
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
  --max-width: 1100px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans Thai', 'Inter', system-ui, sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* ── NAV ── */
.nav { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.85); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; max-width: var(--max-width); margin: 0 auto; padding: 14px 20px; }
.nav-logo { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; font-size: 1.25rem; color: var(--text); }
.nav-logo .logo-icon { width: 34px; height: 34px; background: var(--primary); border-radius: 10px; display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 700; font-size: 0.85rem; }
.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links a { text-decoration: none; color: var(--text-secondary); font-weight: 500; font-size: 0.9rem; transition: var(--transition); }
.nav-links a:hover { color: var(--primary); }
.lang-btn { padding: 6px 14px; border: 1.5px solid var(--border); border-radius: 20px; background: transparent; font-size: 0.85rem; cursor: pointer; transition: var(--transition); }
.lang-btn:hover { border-color: var(--primary); color: var(--primary); }

/* ── HERO ── */
.hero { text-align: center; padding: 60px 20px 40px; }
.hero h1 { font-size: clamp(1.8rem, 5vw, 2.8rem); font-weight: 700; background: linear-gradient(135deg, var(--primary), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; line-height: 1.3; margin-bottom: 12px; }
.hero p { color: var(--text-secondary); font-size: 1.05rem; max-width: 600px; margin: 0 auto; }

/* ── TOOL AREA ── */
.tool-section { max-width: 800px; margin: 0 auto 60px; padding: 0 20px; }
.tool-card { background: var(--bg-card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 40px; border: 1px solid var(--border); }
.tool-card h2 { font-size: 1.2rem; margin-bottom: 20px; color: var(--text); }

/* ── DROP ZONE ── */
.drop-zone { border: 2.5px dashed var(--border); border-radius: var(--radius); padding: 50px 20px; text-align: center; cursor: pointer; transition: var(--transition); background: #fafbff; }
.drop-zone:hover, .drop-zone.drag-over { border-color: var(--primary); background: rgba(108,58,237,0.04); }
.drop-zone .icon { font-size: 3rem; margin-bottom: 12px; }
.drop-zone p { color: var(--text-secondary); margin-bottom: 8px; }
.drop-zone .hint { font-size: 0.8rem; color: var(--text-light); }
.drop-zone input[type="file"] { display: none; }

/* ── BUTTONS ── */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: var(--radius-sm); font-weight: 600; font-size: 0.95rem; cursor: pointer; transition: var(--transition); border: none; text-decoration: none; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-secondary { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn-secondary:hover { background: rgba(108,58,237,0.06); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #059669; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn-sm { padding: 8px 18px; font-size: 0.85rem; }
.btn-lg { padding: 16px 36px; font-size: 1.05rem; }
.btn-block { display: flex; width: 100%; justify-content: center; }

/* ── PREVIEW ── */
.preview-area { margin-top: 30px; text-align: center; }
.preview-area img, .preview-area canvas { max-width: 100%; border-radius: var(--radius-sm); box-shadow: var(--shadow); }
.preview-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 20px; }
.preview-compare .preview-box { text-align: center; }
.preview-compare .preview-box img { max-width: 100%; border-radius: var(--radius-sm); }
.preview-compare .preview-box .label { font-size: 0.85rem; color: var(--text-secondary); margin-top: 8px; }

/* ── CONTROLS ── */
.controls { display: grid; gap: 16px; margin-top: 24px; }
.control-group { display: flex; flex-direction: column; gap: 6px; }
.control-group label { font-weight: 500; font-size: 0.9rem; color: var(--text); }
.control-row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
input[type="text"], input[type="number"], input[type="email"], input[type="url"], select, textarea {
  padding: 10px 14px; border: 1.5px solid var(--border); border-radius: var(--radius-xs);
  font-size: 0.95rem; font-family: inherit; transition: var(--transition); width: 100%; background: var(--bg-card);
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(108,58,237,0.1); }
input[type="range"] { width: 100%; accent-color: var(--primary); }

/* ── PRICING ── */
.pricing { padding: 80px 20px; text-align: center; }
.pricing h2 { font-size: 1.8rem; font-weight: 700; margin-bottom: 8px; }
.pricing .subtitle { color: var(--text-secondary); margin-bottom: 40px; }
.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; max-width: 900px; margin: 0 auto; }
.price-card { background: var(--bg-card); border-radius: var(--radius); padding: 30px 20px; border: 1.5px solid var(--border); transition: var(--transition); position: relative; }
.price-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.price-card.featured { border-color: var(--primary); }
.price-card .badge { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--primary); color: #fff; padding: 4px 16px; border-radius: 20px; font-size: 0.75rem; font-weight: 600; white-space: nowrap; }
.price-card .plan-name { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 4px; }
.price-card .price { font-size: 2.5rem; font-weight: 700; color: var(--primary); }
.price-card .price-note { font-size: 0.8rem; color: var(--text-light); margin-bottom: 16px; }
.price-card ul { list-style: none; text-align: left; margin-bottom: 20px; }
.price-card ul li { padding: 6px 0; font-size: 0.88rem; color: var(--text-secondary); }
.price-card ul li::before { content: "✔ "; color: var(--success); font-weight: 700; }
.price-card ul li.no::before { content: "✗ "; color: var(--error); }

/* ── FEATURES ── */
.features { padding: 60px 20px; text-align: center; }
.features h2 { font-size: 1.6rem; margin-bottom: 40px; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; max-width: 900px; margin: 0 auto; }
.feature-card { background: var(--bg-card); padding: 28px 20px; border-radius: var(--radius); border: 1px solid var(--border); }
.feature-card .icon { font-size: 2.2rem; margin-bottom: 12px; }
.feature-card h3 { font-size: 1rem; margin-bottom: 6px; }
.feature-card p { font-size: 0.85rem; color: var(--text-secondary); }

/* ── FOOTER ── */
.footer { text-align: center; padding: 30px 20px; color: var(--text-light); font-size: 0.85rem; border-top: 1px solid var(--border); }

/* ── MODAL ── */
.modal-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 200; align-items: center; justify-content: center; backdrop-filter: blur(4px); }
.modal-overlay.active { display: flex; }
.modal { background: var(--bg-card); border-radius: var(--radius); padding: 36px; max-width: 440px; width: 90%; max-height: 90vh; overflow-y: auto; box-shadow: var(--shadow-lg); }
.modal h3 { font-size: 1.2rem; margin-bottom: 20px; }
.modal .close-btn { position: absolute; top: 14px; right: 18px; background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--text-light); }

/* ── PROGRESS ── */
.progress-bar { width: 100%; height: 6px; background: var(--border); border-radius: 3px; overflow: hidden; margin: 16px 0; }
.progress-bar .fill { height: 100%; background: linear-gradient(90deg, var(--primary), var(--primary-light)); border-radius: 3px; transition: width 0.3s; }

/* ── STATUS ── */
.status-msg { padding: 12px 16px; border-radius: var(--radius-xs); font-size: 0.9rem; margin-top: 12px; }
.status-msg.success { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.status-msg.error { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.status-msg.info { background: #eff6ff; color: #1e40af; border: 1px solid #bfdbfe; }

/* ── FILE INFO ── */
.file-info { display: flex; align-items: center; gap: 12px; padding: 12px 16px; background: #f8fafc; border-radius: var(--radius-xs); margin-top: 12px; }
.file-info .name { font-weight: 500; font-size: 0.9rem; }
.file-info .size { font-size: 0.8rem; color: var(--text-secondary); }
.file-info .remove { margin-left: auto; background: none; border: none; color: var(--error); cursor: pointer; font-size: 1.2rem; }

/* ── WATERMARK ── */
.watermark-overlay { position: absolute; bottom: 8px; right: 8px; background: rgba(108,58,237,0.85); color: #fff; padding: 3px 10px; border-radius: 4px; font-size: 0.65rem; font-weight: 700; letter-spacing: 1px; pointer-events: none; }

/* ── ANIMATIONS ── */
@keyframes fadeIn { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }
@keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.02); } }
@keyframes spin { to { transform: rotate(360deg); } }
.fade-in { animation: fadeIn 0.5s ease-out; }
.spinner { width: 24px; height: 24px; border: 3px solid var(--border); border-top-color: var(--primary); border-radius: 50%; animation: spin 0.8s linear infinite; display: inline-block; }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .hero h1 { font-size: 1.6rem; }
  .tool-card { padding: 24px; }
  .pricing-grid { grid-template-columns: 1fr 1fr; }
  .preview-compare { grid-template-columns: 1fr; }
  .nav-links a:not(.lang-btn) { display: none; }
}
@media (max-width: 480px) {
  .pricing-grid { grid-template-columns: 1fr; }
  .control-row { flex-direction: column; }
}

/* ── HIDDEN ── */
.hidden { display: none !important; }