:root {
  --bg: #FAF8F5;
  --bg-card: #FFFFFF;
  --text: #1A1A2E;
  --text-sec: #5A5A78;
  --text-muted: #A0A0B8;
  --primary: #5C6BC0;
  --secondary: #7986CB;
  --accent: #FFB300;
  --green: #43A047;
  --red: #E53935;
  --amber: #F9A825;
  --border: rgba(92,107,192,0.08);
  --radius: 12px;
  --font: 'Inter',system-ui,sans-serif;
  --mono: 'JetBrains Mono',monospace;
  --shadow: 0 1px 4px rgba(0,0,0,0.06);
}

[data-theme="dark"] {
  --bg: #121218;
  --bg-card: #1A1A24;
  --text: #D0D0E0;
  --text-sec: #8888A8;
  --text-muted: #484868;
  --border: rgba(92,107,192,0.06);
  --shadow: 0 1px 4px rgba(0,0,0,0.2);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;transition:background .3s,color .3s}

.header{display:flex;align-items:center;justify-content:space-between;padding:8px 14px;background:var(--bg-card);border-bottom:1px solid var(--border);flex-wrap:wrap;gap:6px;box-shadow:var(--shadow)}
.header h1{font-size:.88rem;font-weight:700;color:var(--primary)}
.header-right{display:flex;align-items:center;gap:4px;flex-wrap:wrap}

.btn{padding:4px 10px;border:1px solid var(--border);border-radius:8px;background:transparent;color:var(--text-sec);font-family:var(--font);font-size:.66rem;cursor:pointer;transition:.2s}
.btn:hover{border-color:var(--primary);color:var(--primary)}
.btn.primary{background:var(--primary);color:#fff;border:none;font-weight:600}
.btn.full{width:100%}
.search{width:130px;padding:4px 8px;font-size:.64rem}

.app{max-width:1000px;margin:0 auto;padding:12px}

.layout{display:grid;grid-template-columns:260px 1fr;gap:8px}

.sidebar{display:flex;flex-direction:column;gap:4px}

.input{width:100%;padding:5px 8px;border:1px solid var(--border);border-radius:6px;background:var(--bg);color:var(--text);font-family:var(--font);font-size:.7rem;transition:border .2s}
.input:focus{outline:none;border-color:var(--primary)}
.sel{width:auto;font-size:.64rem}

.label{font-size:.54rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.03em;display:block;margin-bottom:2px;font-weight:500}

/* Decision list */
.dec-item{background:var(--bg-card);border:1px solid var(--border);border-radius:8px;padding:6px 8px;cursor:pointer;transition:.15s;box-shadow:var(--shadow)}
.dec-item:hover{border-color:rgba(92,107,192,.15)}
.dec-item.active{border-color:var(--primary);background:rgba(92,107,192,.04)}
.dec-item+.dec-item{margin-top:3px}
.dec-title{font-size:.66rem;font-weight:600;color:var(--text)}
.dec-meta{display:flex;gap:4px;margin-top:2px;flex-wrap:wrap}

.badge{font-size:.48rem;padding:1px 5px;border-radius:4px;font-weight:600}
.badge-proposed{background:rgba(255,179,0,.08);color:var(--amber)}
.badge-accepted{background:rgba(67,160,71,.08);color:var(--green)}
.badge-deprecated{background:rgba(229,57,53,.08);color:var(--red)}
.badge-superseded{background:rgba(160,160,184,.08);color:var(--text-muted)}

.badge-architecture{background:rgba(92,107,192,.08);color:var(--primary)}
.badge-security{background:rgba(229,57,53,.06);color:var(--red)}
.badge-performance{background:rgba(255,179,0,.06);color:var(--amber)}
.badge-ux{background:rgba(67,160,71,.06);color:var(--green)}
.badge-devops{background:rgba(121,134,203,.06);color:var(--secondary)}

.impact-low{color:var(--green)}
.impact-medium{color:var(--amber)}
.impact-high{color:var(--red)}

/* Detail / Form */
.detail{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:14px;box-shadow:var(--shadow);min-height:400px}
.empty-state{font-size:.7rem;color:var(--text-muted);text-align:center;padding:40px}

.form{animation:slideIn .2s ease}
.form-group{margin-bottom:8px}
.form-row{display:grid;grid-template-columns:1fr 1fr 1fr;gap:6px}
.form-actions{display:flex;gap:4px;margin-top:8px}

@keyframes slideIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}

@media print{.header,.sidebar,.form-actions{display:none !important}.layout{grid-template-columns:1fr}.detail{border:none;box-shadow:none}}
@media(max-width:600px){.layout{grid-template-columns:1fr}.form-row{grid-template-columns:1fr}}