/* ═══════════════════════════════════════
   DILI Predictor — Design System
   ═══════════════════════════════════════ */

/* ── Dark theme (default) ── */
:root {
  --bg-deep: #060a14;
  --bg: #0a1020;
  --surface: rgba(255,255,255,0.035);
  --surface-2: rgba(255,255,255,0.06);
  --surface-3: rgba(255,255,255,0.09);
  --border: rgba(255,255,255,0.07);
  --border-focus: rgba(0,212,170,0.4);
  --primary: #00d4aa;
  --primary-dark: #00b894;
  --primary-dim: rgba(0,212,170,0.15);
  --primary-glow: rgba(0,212,170,0.25);
  --accent: #7b6cf6;
  --text: #f0f2f5;
  --text-2: rgba(255,255,255,0.62);
  --text-3: rgba(255,255,255,0.28);
  --red: #ff4d6a;
  --red-dim: rgba(255,77,106,0.10);
  --green: #00d68f;
  --green-dim: rgba(0,214,143,0.10);
  --amber: #ffaa2c;
  --amber-dim: rgba(255,170,44,0.10);
  --mol-bg: rgba(255,255,255,0.03);
  --ring-bg: rgba(255,255,255,0.06);
  --chart-bg: rgba(255,255,255,0.03);
  --radius: 16px;
  --radius-sm: 10px;
  --font: 'Space Grotesk',-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
}

/* ── Light theme ── */
[data-theme="light"] {
  --bg-deep: #f4f7fa;
  --bg: #edf1f7;
  --surface: rgba(255,255,255,0.72);
  --surface-2: rgba(255,255,255,0.85);
  --surface-3: rgba(0,0,0,0.04);
  --border: rgba(0,0,0,0.08);
  --border-focus: rgba(13,148,136,0.45);
  --primary: #0d9488;
  --primary-dark: #0f766e;
  --primary-dim: rgba(13,148,136,0.12);
  --primary-glow: rgba(13,148,136,0.18);
  --accent: #7c3aed;
  --text: #0f172a;
  --text-2: #475569;
  --text-3: #94a3b8;
  --red: #dc2626;
  --red-dim: rgba(220,38,38,0.08);
  --green: #16a34a;
  --green-dim: rgba(22,163,74,0.08);
  --amber: #d97706;
  --amber-dim: rgba(217,119,6,0.08);
  --mol-bg: rgba(0,0,0,0.02);
  --ring-bg: rgba(0,0,0,0.06);
  --chart-bg: rgba(0,0,0,0.03);
}

/* ── Reset ── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
button,input,textarea,select{font:inherit}
button{cursor:pointer}
ul{list-style:none}
body{min-height:100vh;background:var(--bg);color:var(--text);font-family:var(--font);font-size:14px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
.hidden{display:none!important}

/* ── Orbs ── */
.orb{position:fixed;border-radius:50%;pointer-events:none;z-index:0}
.orb-1{width:700px;height:700px;background:radial-gradient(circle,rgba(0,212,170,.07),transparent 65%);top:-250px;left:-200px;animation:d1 20s ease-in-out infinite}
.orb-2{width:500px;height:500px;background:radial-gradient(circle,rgba(123,108,246,.06),transparent 65%);top:30%;right:-150px;animation:d2 25s ease-in-out infinite}
.orb-3{width:400px;height:400px;background:radial-gradient(circle,rgba(0,149,255,.05),transparent 65%);bottom:-100px;left:30%;animation:d3 22s ease-in-out infinite}
[data-theme="light"] .orb-1{background:radial-gradient(circle,rgba(13,148,136,.06),transparent 65%)}
[data-theme="light"] .orb-2{background:radial-gradient(circle,rgba(124,58,237,.05),transparent 65%)}
[data-theme="light"] .orb-3{background:radial-gradient(circle,rgba(0,149,255,.04),transparent 65%)}
@keyframes d1{0%,100%{transform:translate(0,0)}50%{transform:translate(30px,20px)}}
@keyframes d2{0%,100%{transform:translate(0,0)}50%{transform:translate(-20px,30px)}}
@keyframes d3{0%,100%{transform:translate(0,0)}50%{transform:translate(20px,-25px)}}

/* ── Glass ── */
.glass{background:var(--surface);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);border:1px solid var(--border);border-radius:var(--radius);padding:28px;margin-bottom:16px;position:relative;z-index:1}
[data-theme="light"] .glass{background:var(--surface);box-shadow:0 1px 4px rgba(0,0,0,.04)}
@supports not (backdrop-filter:blur(1px)){
  .glass{background:rgba(20,28,48,.92)}
  [data-theme="light"] .glass{background:rgba(255,255,255,.94)}
}

/* ── Header ── */
.header{position:sticky;top:0;z-index:50;background:rgba(10,16,32,.72);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border)}
[data-theme="light"] .header{background:rgba(244,247,250,.82)}
.header-inner{max-width:840px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:58px}
.brand{display:flex;align-items:center;gap:12px}
.brand-icon{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:800;color:#fff;flex-shrink:0}
[data-theme="light"] .brand-icon{color:#fff}
.brand h1{font-size:16px;font-weight:700;line-height:1.2}
.brand p{font-size:11px;color:var(--text-3);margin-top:1px}
.header-right{display:flex;align-items:center;gap:14px}

/* ── Status ── */
.status{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--text-3)}
.status-dot{width:7px;height:7px;border-radius:50%;background:var(--text-3);flex-shrink:0}
.status-dot--ready{background:var(--green);box-shadow:0 0 8px var(--green)}
.status-dot--down{background:var(--red);box-shadow:0 0 8px var(--red)}
.status-dot--checking{background:var(--amber);animation:blink 1.4s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.3}}

/* ── Theme toggle ── */
.theme-toggle{background:var(--surface-2);border:1px solid var(--border);border-radius:8px;width:34px;height:34px;display:flex;align-items:center;justify-content:center;font-size:15px;transition:background .2s,transform .15s}
.theme-toggle:hover{background:var(--surface-3);transform:scale(1.05)}
.theme-toggle:active{transform:scale(.95)}

/* ── Main ── */
.main{max-width:840px;margin:0 auto;padding:0 16px 40px;position:relative;z-index:1}

/* ── Hero ── */
.hero{text-align:center;padding:40px 0 32px}
.hero h2{font-size:30px;font-weight:700;background:linear-gradient(135deg,var(--text) 30%,var(--primary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:14px}
.hero p{font-size:15px;color:var(--text-2);max-width:500px;margin:0 auto;line-height:1.75}

/* ── How-to ── */
.how-to{display:flex;align-items:center;justify-content:center;gap:16px;padding:18px 28px;text-align:center;animation:fadeIn .5s ease}
.step{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-2)}
.step-num{width:26px;height:26px;border-radius:50%;background:var(--primary-dim);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;flex-shrink:0}
.step-arrow{color:var(--text-3);font-size:16px}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

/* ── Input grid ── */
.input-grid{display:grid;grid-template-columns:1fr 280px;gap:24px;align-items:start}
.input-right{position:sticky;top:74px}
.mol-preview-card{background:var(--mol-bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px;text-align:center}
.mol-preview-label{font-size:11px;color:var(--text-3);margin-bottom:8px;text-transform:uppercase;letter-spacing:.5px;font-weight:600}
#mol-preview{display:block;margin:0 auto;max-width:100%}
.mol-preview-fallback{font-size:12px;color:var(--text-3);padding:20px 0}

/* ── Tabs ── */
.tabs{display:flex;background:var(--surface-2);border-radius:var(--radius-sm);padding:3px;margin-bottom:22px}
.tab{flex:1;padding:9px 0;border:none;background:transparent;border-radius:8px;font-size:13px;font-weight:500;color:var(--text-2);transition:all .25s}
.tab:hover{color:var(--text)}
.tab.active{background:var(--surface-3);color:var(--text);box-shadow:0 1px 4px rgba(0,0,0,.2)}
[data-theme="light"] .tab.active{background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.08)}

/* ── Fields ── */
.field{display:block;margin-bottom:16px}
.field-label{display:block;font-size:13px;font-weight:500;color:var(--text-2);margin-bottom:8px}
input,textarea{width:100%;padding:11px 14px;background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:14px;outline:none;transition:border-color .2s,box-shadow .2s,background .2s}
input:focus,textarea:focus{border-color:var(--border-focus);box-shadow:0 0 0 3px var(--primary-dim);background:var(--surface-3)}
input::placeholder,textarea::placeholder{color:var(--text-3)}
textarea{resize:vertical;min-height:48px;font-family:"SF Mono","Cascadia Code",Consolas,monospace;font-size:13px}
.field-hint{font-size:12px;color:var(--text-3);margin-top:6px;transition:color .2s}
.field-hint.matched{color:var(--green)}
.field-hint.error{color:var(--red)}

/* ── Buttons ── */
.actions{display:flex;gap:12px;margin-top:8px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:var(--radius-sm);font-size:14px;font-weight:600;transition:all .25s;white-space:nowrap}
.btn-primary{padding:12px 34px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff}
[data-theme="light"] .btn-primary{color:#fff}
.btn-primary:hover{box-shadow:0 4px 28px var(--primary-glow);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-primary:disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}
.btn-ghost{padding:12px 20px;background:transparent;color:var(--text-2);border:1px solid var(--border)}
.btn-ghost:hover{background:var(--surface-2);color:var(--text)}
.btn-sm{padding:6px 14px;font-size:12px;border-radius:6px}
.spinner{display:none;width:16px;height:16px;border:2px solid rgba(255,255,255,.25);border-top-color:#fff;border-radius:50%;animation:spin .6s linear infinite}
.is-loading .spinner{display:inline-block}
@keyframes spin{to{transform:rotate(360deg)}}

/* ── Samples ── */
.samples{margin-top:24px;padding-top:20px;border-top:1px solid var(--border)}
.samples-label{font-size:12px;color:var(--text-3);display:block;margin-bottom:12px}
#sample-list{display:flex;flex-wrap:wrap;gap:8px}
.sample-chip{padding:6px 16px;border:1px solid var(--border);border-radius:20px;background:rgba(255,255,255,.03);font-size:12px;color:var(--text-2);transition:all .2s;position:relative;overflow:hidden}
.sample-chip:hover{background:var(--primary-dim);border-color:rgba(0,212,170,.3);color:var(--primary)}
[data-theme="light"] .sample-chip{background:rgba(0,0,0,.02)}
[data-theme="light"] .sample-chip:hover{background:var(--primary-dim)}

/* ── Results ── */
.results{animation:fadeUp .4s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}

/* ── Result card ── */
.result-card{border-left:3px solid var(--border)}
.result-top{display:flex;align-items:center;gap:28px}

/* SVG ring */
.prob-ring-wrap{position:relative;width:120px;height:120px;flex-shrink:0}
.prob-svg{width:100%;height:100%;transform:rotate(-90deg)}
.ring-track{fill:none;stroke:var(--ring-bg);stroke-width:8}
.ring-fill{fill:none;stroke:var(--primary);stroke-width:8;stroke-linecap:round;stroke-dasharray:326.73;stroke-dashoffset:326.73;transition:stroke-dashoffset 1.2s cubic-bezier(.4,0,.2,1),stroke .4s,filter .4s}
.prob-num{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:700}

.result-info{min-width:0}
.risk-label{font-size:22px;font-weight:700;line-height:1.3;transition:color .3s}
.risk-conf{font-size:13px;color:var(--text-2);margin-top:4px}
.smiles-out{display:inline-block;margin-top:10px;font-size:12px;color:var(--text-3);background:var(--surface-2);padding:5px 12px;border-radius:6px;word-break:break-all;font-family:"SF Mono","Cascadia Code",Consolas,monospace}

/* bar */
.bar-track{height:5px;background:var(--ring-bg);border-radius:3px;overflow:hidden;margin-top:22px}
.bar-fill{height:100%;width:0;border-radius:3px;transition:width .8s ease,background .3s}

/* ── Viz row (molecule + SHAP chart) ── */
.viz-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.viz-card{display:flex;flex-direction:column}
.viz-card canvas{display:block;margin:8px auto 0;max-width:100%}

/* ── SHAP chart ── */
.shap-chart{margin-top:4px}
.shap-empty{color:var(--text-3);font-size:13px;font-style:italic;padding:16px 0}
.shap-row{display:flex;align-items:center;gap:10px;margin-bottom:10px;animation:shapIn .4s ease backwards}
.shap-row:nth-child(1){animation-delay:.05s}
.shap-row:nth-child(2){animation-delay:.1s}
.shap-row:nth-child(3){animation-delay:.15s}
.shap-row:nth-child(4){animation-delay:.2s}
.shap-row:nth-child(5){animation-delay:.25s}
.shap-row:nth-child(6){animation-delay:.3s}
.shap-row:nth-child(7){animation-delay:.35s}
.shap-row:nth-child(8){animation-delay:.4s}
@keyframes shapIn{from{opacity:0;transform:translateX(-8px)}to{opacity:1;transform:translateX(0)}}
.shap-name{flex:1;font-size:11px;color:var(--text-2);text-align:right;line-height:1.4;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.shap-bar-bg{width:140px;height:18px;background:var(--chart-bg);border-radius:4px;overflow:hidden;flex-shrink:0}
.shap-bar{height:100%;border-radius:4px;transition:width .7s cubic-bezier(.4,0,.2,1)}
.shap-pos{background:linear-gradient(90deg,var(--red),rgba(255,77,106,.7))}
.shap-neg{background:linear-gradient(90deg,var(--green),rgba(0,214,143,.7))}
.shap-val{width:52px;font-size:11px;font-family:"SF Mono","Cascadia Code",Consolas,monospace;flex-shrink:0}
.shap-val-pos{color:var(--red)}
.shap-val-neg{color:var(--green)}

/* ── Section titles ── */
.section-title{font-size:14px;font-weight:600;margin-bottom:12px}
.body-text{font-size:14px;line-height:1.8;color:var(--text-2)}

/* ── Factors ── */
.factors{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.factor-risk{border-top:2px solid rgba(255,77,106,.4)}
.factor-safe{border-top:2px solid rgba(0,214,143,.4)}
[data-theme="light"] .factor-risk{border-top-color:rgba(220,38,38,.3)}
[data-theme="light"] .factor-safe{border-top-color:rgba(22,163,74,.3)}
.factor-list{margin-top:2px}
.factor-list li{padding:10px 14px;background:var(--surface-2);border-radius:8px;margin-bottom:8px;font-size:13px;line-height:1.6;color:var(--text-2)}
.factor-list li.factor-empty{color:var(--text-3);font-style:italic;background:transparent;padding-left:0}

/* ── SHAP text ── */
.shap-top{display:flex;align-items:center;justify-content:space-between}
.shap-pre{background:rgba(0,0,0,.18);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px;font-size:13px;line-height:1.7;white-space:pre-wrap;word-break:break-all;margin-top:12px;max-height:280px;overflow-y:auto;font-family:"SF Mono","Cascadia Code",Consolas,monospace;color:var(--text-2)}
[data-theme="light"] .shap-pre{background:rgba(0,0,0,.04)}

/* ── History ── */
#history-list{margin-top:4px}
.history-empty{color:var(--text-3);font-size:13px;font-style:italic;padding:8px 0}
.history-item{display:flex;align-items:center;gap:12px;padding:10px 14px;background:var(--surface-2);border-radius:8px;margin-bottom:8px;cursor:pointer;transition:background .2s}
.history-item:hover{background:var(--surface-3)}
.history-prob{font-size:14px;font-weight:700;min-width:48px}
.history-name{flex:1;font-size:13px;color:var(--text-2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.history-label{font-size:12px;padding:2px 8px;border-radius:4px;font-weight:500}
.history-label-pos{background:var(--red-dim);color:var(--red)}
.history-label-neg{background:var(--green-dim);color:var(--green)}
.history-time{font-size:11px;color:var(--text-3);flex-shrink:0}

/* ── Footer ── */
.footer{text-align:center;padding:28px 16px 40px;font-size:12px;color:var(--text-3);position:relative;z-index:1}

/* ── Toasts ── */
.toasts{position:fixed;top:20px;right:20px;z-index:200;display:flex;flex-direction:column;gap:8px;pointer-events:none}
.toast{padding:12px 20px;background:rgba(30,40,60,.95);backdrop-filter:blur(12px);border:1px solid var(--border);border-radius:var(--radius-sm);box-shadow:0 8px 32px rgba(0,0,0,.35);font-size:13px;color:var(--text);animation:toastIn .3s ease,toastOut .3s ease 2.7s forwards}
[data-theme="light"] .toast{background:rgba(255,255,255,.95);color:var(--text);box-shadow:0 8px 24px rgba(0,0,0,.12)}
.toast--error{border-color:rgba(255,77,106,.3);background:rgba(255,77,106,.12);color:var(--red)}
[data-theme="light"] .toast--error{background:rgba(254,242,242,.95);border-color:rgba(220,38,38,.2)}
@keyframes toastIn{from{opacity:0;transform:translateX(20px)}to{opacity:1;transform:translateX(0)}}
@keyframes toastOut{from{opacity:1}to{opacity:0}}

/* ── Responsive ── */
@media(max-width:768px){
  .input-grid{grid-template-columns:1fr}
  .input-right{position:static}
  .viz-row{grid-template-columns:1fr}
}
@media(max-width:640px){
  .factors{grid-template-columns:1fr}
  .result-top{flex-direction:column;align-items:flex-start;gap:20px}
  .prob-ring-wrap{width:100px;height:100px}
  .prob-num{font-size:20px}
  .risk-label{font-size:18px}
  .glass{padding:20px 16px}
  .hero h2{font-size:24px}
  .how-to{flex-direction:column;gap:8px}
  .step-arrow{display:none}
  .header-inner{padding:0 16px}
  .shap-bar-bg{width:100px}
  .orb-1{width:400px;height:400px}
  .orb-2{width:300px;height:300px}
  .orb-3{width:250px;height:250px}
}