:root {
  --bg: #0A1A18;
  --bg-card: #0F2622;
  --text: #D0F0E8;
  --text-sec: #78A898;
  --text-muted: #3A6058;
  --primary: #14B8A6;
  --secondary: #2DD4BF;
  --accent: #E11D48;
  --green: #22C55E;
  --border: rgba(20,184,166,0.06);
  --radius: 12px;
  --font: 'Inter',system-ui,sans-serif;
  --mono: 'JetBrains Mono',monospace;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh}

.header{display:flex;align-items:center;justify-content:space-between;padding:8px 14px;background:var(--bg-card);border-bottom:1px solid var(--border)}
.header h1{font-size:.88rem;font-weight:700;color:var(--primary)}
.header-right{display:flex;gap:4px}

.btn{padding:4px 10px;border:1px solid var(--border);border-radius:8px;background:transparent;color:var(--text-sec);font-family:var(--font);font-size:.68rem;cursor:pointer;transition:.2s}
.btn:hover{border-color:var(--primary);color:var(--primary)}
.btn.primary{background:var(--primary);color:#000;border:none;font-weight:600}

.app{max-width:800px;margin:0 auto;padding:12px}

.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:12px;margin-bottom:8px}
.card h2{font-size:.64rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em;margin-bottom:6px}
.hint{font-size:.62rem;color:var(--text-muted);margin-bottom:6px}
.hint code{background:rgba(20,184,166,.08);padding:1px 4px;border-radius:3px;font-family:var(--mono);font-size:.6rem}

.input{width:100%;padding:6px 10px;border:1px solid var(--border);border-radius:8px;background:rgba(255,255,255,.02);color:var(--text);font-family:var(--font);font-size:.74rem}
.input.code{font-family:var(--mono);font-size:.7rem;line-height:1.6}
.input:focus{outline:none;border-color:var(--primary)}

.range{width:100%;accent-color:var(--primary)}
.timeline-bar{margin-bottom:6px}
.timeline-labels{display:flex;justify-content:space-between;font-size:.54rem;color:var(--text-muted);margin-top:2px}
.timeline-info{font-size:.7rem;color:var(--secondary)}

/* Diagram */
.diagram-area{display:flex;flex-wrap:wrap;gap:8px;min-height:100px}
.table-box{background:rgba(20,184,166,.04);border:1px solid rgba(20,184,166,.12);border-radius:8px;min-width:160px;overflow:hidden}
.table-name{padding:4px 8px;background:rgba(20,184,166,.08);font-size:.68rem;font-weight:600;color:var(--primary);border-bottom:1px solid rgba(20,184,166,.08)}
.col-list{padding:4px 8px}
.col-item{font-size:.64rem;color:var(--text-sec);padding:1px 0;font-family:var(--mono);display:flex;justify-content:space-between;gap:8px}
.col-type{color:var(--text-muted);font-size:.58rem}
.col-new{color:var(--green);font-weight:600}
.col-removed{color:var(--accent);text-decoration:line-through}
.idx-badge{font-size:.52rem;padding:1px 4px;border-radius:3px;background:rgba(45,212,191,.08);color:var(--secondary);margin:2px 8px}

/* Diff */
.diff-item{padding:3px 0;font-size:.68rem;font-family:var(--mono)}
.diff-add{color:var(--green)}
.diff-remove{color:var(--accent)}
.diff-modify{color:var(--secondary)}

@media(max-width:480px){.diagram-area{flex-direction:column}}