:root {
  --bg: #f7f9fc;
  --surface: #ffffff;
  --surface2: #ffffff;
  --border: #e3e8f0;
  --text: #0f172a;
  --muted: #5b6878;
  --accent: #2563eb;
  --success: #059669;
  --radius: 8px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; }
body { background: var(--bg); color: var(--text); font-family: 'Segoe UI', system-ui, sans-serif; min-height: 100vh; }

nav { background: var(--surface); border-bottom: 1px solid var(--border); padding: 0 20px; }
.nav-inner { max-width: 1100px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; height: 52px; }
.logo { font-weight: 700; font-size: 1.1rem; }
.nav-badge { font-size: .75rem; color: var(--muted); background: var(--surface2); border: 1px solid var(--border); padding: 3px 10px; border-radius: 20px; }

.container { max-width: 1100px; margin: 0 auto; padding: 28px 20px; }

/* MAIN GRID */
.main-grid { display: grid; grid-template-columns: 1fr 180px; gap: 16px; align-items: start; margin-bottom: 28px; }

/* INPUT PANEL */
.input-panel { display: flex; flex-direction: column; }
.panel-header { display: flex; align-items: center; justify-content: space-between; padding: 10px 14px; background: var(--surface2); border: 1px solid var(--border); border-bottom: none; border-radius: var(--radius) var(--radius) 0 0; }
.panel-label { font-size: .8rem; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.panel-actions { display: flex; gap: 6px; }
.btn-sm { background: var(--surface); border: 1px solid var(--border); color: var(--text); padding: 4px 10px; border-radius: 5px; cursor: pointer; font-size: .8rem; transition: background .15s; }
.btn-sm:hover { background: var(--border); }
.big-area { width: 100%; height: 200px; resize: vertical; background: var(--surface); border: 1px solid var(--border); border-bottom: none; color: var(--text); font-size: .95rem; padding: 14px; outline: none; line-height: 1.6; font-family: inherit; transition: border-color .15s; }
.big-area:focus { border-color: var(--accent); }
.stats-bar { display: flex; gap: 16px; padding: 8px 14px; background: var(--surface2); border: 1px solid var(--border); border-radius: 0 0 var(--radius) var(--radius); font-size: .8rem; color: var(--muted); }

/* QUICK BUTTONS */
.quick-btns { display: flex; flex-direction: column; gap: 6px; }
.quick-btn { background: var(--surface2); border: 1px solid var(--border); color: var(--text); padding: 9px 10px; border-radius: var(--radius); cursor: pointer; font-size: .8rem; text-align: left; transition: background .15s, border-color .15s, color .15s; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.quick-btn:hover { background: var(--accent); border-color: var(--accent); color: #fff; }

/* RESULTS */
.results-title { font-size: .8rem; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 12px; }
.results-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 12px; margin-bottom: 20px; }
.result-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; cursor: pointer; transition: border-color .15s, background .15s; }
.result-card:hover { border-color: var(--accent); background: var(--surface2); }
.result-card.copied { border-color: var(--success); }
.card-header { display: flex; align-items: center; justify-content: space-between; padding: 8px 12px; background: var(--surface2); border-bottom: 1px solid var(--border); }
.card-name { font-size: .75rem; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.copy-hint { font-size: .7rem; color: var(--muted); }
.copied .copy-hint { color: var(--success); }
.card-value { padding: 12px; font-family: 'Consolas', 'Monaco', monospace; font-size: .875rem; line-height: 1.5; word-break: break-all; color: var(--text); min-height: 44px; }
.card-value:empty::before { content: '—'; color: var(--muted); }

/* TIP */
.tip-row { padding: 12px 16px; background: var(--surface2); border: 1px solid var(--border); border-left: 3px solid var(--accent); border-radius: 0 var(--radius) var(--radius) 0; font-size: .85rem; color: var(--muted); }

.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; }

@media (max-width: 700px) {
  .main-grid { grid-template-columns: 1fr; }
  .quick-btns { flex-direction: row; flex-wrap: wrap; }
  .quick-btn { flex: 0 0 auto; }
  .results-grid { grid-template-columns: 1fr; }
}