:root {
  --bg: #f3f6fb;
  --panel: #ffffff;
  --panel-2: #f8fbff;
  --text: #0f172a;
  --muted: #64748b;
  --line: #dbe4f0;
  --accent: #2563eb;
  --accent-2: #7c3aed;
  --success: #16a34a;
  --warn: #f59e0b;
  --danger: #ef4444;
  --radius: 16px;
  --shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
}

body.dark {
  --bg: #090f1d;
  --panel: #111a2d;
  --panel-2: #17253e;
  --text: #e6edf8;
  --muted: #93a4bd;
  --line: #22324d;
  --accent: #3b82f6;
  --accent-2: #a855f7;
  --shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top, #eef4ff 0%, var(--bg) 35%);
  transition: background .25s ease, color .25s ease;
}
body.dark { background: radial-gradient(circle at top, #0f1a34 0%, var(--bg) 35%); }

.wrapper { width: min(1440px, 100% - 24px); margin: 12px auto 24px; }
.topbar {
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  align-items: center; margin-bottom: 12px;
}
.brand h1 { margin: 0; font-size: clamp(1.2rem, 3vw, 1.8rem); }
.brand p { margin: 4px 0 0; color: var(--muted); }
.header-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.theme-toggle { display: inline-flex; align-items: center; gap: 8px; background: var(--panel); border: 1px solid var(--line); border-radius: 999px; padding: 8px 12px; }

.chip-btn, .action-buttons button, .clear-history-btn, .tool-toggle-btn, .copy-btn, .scroll-top-btn {
  border: 1px solid transparent; border-radius: 12px; cursor: pointer; transition: .2s ease;
}
.chip-btn { padding: 10px 14px; background: var(--panel); border-color: var(--line); color: var(--text); }
.chip-btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }

.workspace-grid { display: grid; gap: 12px; grid-template-columns: 1fr; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 14px; }
.panel-title { margin: 0 0 10px; font-size: 1rem; }
.panel-section { margin-top: 12px; border-top: 1px solid var(--line); padding-top: 12px; }
.mini-kpis p { margin: 8px 0; color: var(--muted); }

.action-buttons { display: grid; gap: 8px; }
.action-buttons button { min-height: 44px; color: #fff; font-weight: 700; padding: 10px 12px; }
#scanFreeBtn { background: linear-gradient(135deg, #16a34a, #15803d); }
#premiumBtn { background: linear-gradient(135deg, #8b5cf6, #6d28d9); }
#exportPdfBtn { background: linear-gradient(135deg, #0ea5e9, #0284c7); }
#exportTxtBtn, #exportCsvBtn, #copyReportBtn { background: linear-gradient(135deg, #1f2937, #0f172a); }

.center-workspace { position: relative; }
.fullscreen-btn {
  position: absolute; top: 12px; right: 12px; border: 1px solid var(--line); background: var(--panel);
  color: var(--text); border-radius: 10px; min-width: 40px; min-height: 40px; cursor: pointer;
}
.input-label { display: block; margin-bottom: 8px; color: var(--muted); font-weight: 600; }
#articleInput, #embedCode, .history-edit-input {
  width: 100%; border: 1px solid var(--line); border-radius: 12px; background: var(--panel-2);
  color: var(--text); padding: 12px; min-height: 190px; resize: vertical; font: inherit; line-height: 1.55;
}
.app-status { min-height: 20px; margin-top: 8px; color: var(--muted); }
.results-panel.hidden, .empty-state.hidden { display: none; }
.empty-state { border: 1px dashed var(--line); border-radius: 14px; padding: 20px; margin-top: 10px; background: var(--panel-2); }
.empty-state h2 { margin: 0 0 8px; font-size: 1.05rem; }
.empty-state p { margin: 0; color: var(--muted); }
.results-header { display: flex; align-items: end; justify-content: space-between; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.results-heading, .subheading { margin: 0; }
.scan-time { margin: 0; color: var(--muted); font-size: .9rem; }

.score-cards, .insights-grid, .paragraph-cards, .chart-grid { display: grid; gap: 10px; margin-top: 10px; }
.score-cards { grid-template-columns: repeat(auto-fit, minmax(135px, 1fr)); }
.insights-grid { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.paragraph-cards { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.chart-grid { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card {
  border: 1px solid var(--line); border-radius: 14px; padding: 12px; background: var(--panel-2);
}
.card h4, .card h5 { margin: 0 0 8px; }
.card p { margin: 0; color: var(--muted); }
.big-score { font-size: 1.5rem; font-weight: 800; margin: 2px 0; }
.meter { height: 8px; border-radius: 999px; background: #d7e3f4; overflow: hidden; margin-top: 8px; }
.meter > span { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width .45s ease; }
.badge { font-size: .75rem; padding: 4px 8px; border-radius: 999px; display: inline-block; font-weight: 700; }
.badge.good { background: rgba(22, 163, 74, .16); color: var(--success); }
.badge.warn { background: rgba(245, 158, 11, .16); color: var(--warn); }
.badge.risk { background: rgba(239, 68, 68, .16); color: var(--danger); }
.chart-card { border: 1px solid var(--line); border-radius: 14px; padding: 10px; background: var(--panel-2); min-height: 240px; }

#resultOutput {
  white-space: pre-wrap; overflow-wrap: anywhere; border: 1px solid var(--line); border-radius: 12px;
  background: var(--panel-2); color: var(--text); padding: 12px; margin-top: 8px;
}
.graph-output { display: grid; gap: 6px; margin-top: 10px; }
.graph-output .bar {
  min-height: 34px; border-radius: 10px; color: #fff; font-size: .8rem; display: flex;
  align-items: center; justify-content: flex-end; padding: 0 10px; font-weight: 700;
}

.history-search {
  width: 100%; min-height: 40px; border-radius: 10px; border: 1px solid var(--line); padding: 8px 10px; margin-bottom: 8px;
  background: var(--panel-2); color: var(--text);
}
.history-list { display: grid; gap: 8px; max-height: 62vh; overflow: auto; }
.history-item { border: 1px solid var(--line); border-radius: 12px; padding: 10px; background: var(--panel-2); }
.history-meta { display: flex; justify-content: space-between; gap: 8px; color: var(--muted); font-size: .82rem; }
.history-preview { margin: 8px 0; font-size: .9rem; }
.history-actions { display: flex; flex-wrap: wrap; gap: 6px; }
.history-actions button { background: #334155; color: #fff; border: 0; padding: 8px 10px; border-radius: 10px; }
.history-actions .fav { background: #7c3aed; }
.history-empty { color: var(--muted); }

.payment-popup, .popup-overlay, .legal-popup-overlay {
  position: fixed; inset: 0; background: rgba(2, 6, 23, .65); z-index: 9999; display: none; align-items: center; justify-content: center; padding: 16px;
}
.payment-popup.payment-popup--open, .popup-overlay.active, .legal-popup-overlay.is-open { display: flex; }
.payment-content, .popup-box, .legal-popup-box {
  width: min(640px, 100%); max-height: 90vh; overflow: auto; border-radius: 18px; background: var(--panel); color: var(--text); border: 1px solid var(--line); box-shadow: var(--shadow); padding: 18px;
}
.legal-popup-box {
  text-align: center;
}
.legal-popup-icon {
  font-size: 2rem;
  margin-bottom: 8px;
}
.legal-popup-box h3 {
  margin: 0 0 8px;
}
.legal-popup-box p {
  margin: 0 0 10px;
  color: var(--muted);
  line-height: 1.5;
}
.legal-popup-box #closeLegalPopup {
  min-height: 42px;
  padding: 10px 16px;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #fff;
  border: 0;
  border-radius: 10px;
  font-weight: 700;
  cursor: pointer;
}
.popup-close, .close-popup { position: absolute; top: 10px; right: 10px; background: var(--panel-2); color: var(--text); border: 1px solid var(--line); border-radius: 999px; min-width: 34px; min-height: 34px; }
.popup-box { position: relative; }
.tool-extra-actions { width: min(1440px, 100% - 24px); margin: 0 auto 20px; display: flex; gap: 8px; flex-wrap: wrap; }
.tool-toggle-btn { background: var(--panel); color: var(--text); border-color: var(--line); padding: 10px 14px; }
.copy-btn { background: linear-gradient(135deg, #16a34a, #15803d); color: #fff; padding: 10px 14px; border: 0; }

.scroll-top-btn {
  position: fixed; bottom: 14px; right: 14px; z-index: 10000; background: var(--panel); color: var(--text);
  border-color: var(--line); min-height: 42px; padding: 10px 14px;
}
.app-toast {
  position: fixed; left: 50%; transform: translateX(-50%) translateY(10px); bottom: 10px; z-index: 10000;
  background: #0f172a; color: #fff; border-radius: 10px; padding: 10px 12px; opacity: 0; transition: .2s ease;
}
.app-toast--visible { opacity: 1; transform: translateX(-50%) translateY(0); }
.app-status--success { color: var(--success); }
.app-status--error { color: var(--danger); }
.app-status--info { color: var(--accent); }

@media (min-width: 1024px) {
  .workspace-grid { grid-template-columns: 240px 1fr 300px; }
}
@media (max-width: 768px) {
  .action-buttons button, .history-actions button, .tool-toggle-btn { min-height: 44px; }
}