*{margin:0;padding:0;box-sizing:border-box}
html{font-size:var(--base-font,16px)}
html.text-small{--base-font:14px}
html.text-large{--base-font:20px}
:root{
  --bg:#1a1a2e;--surface:#16213e;--card:#0f3460;--accent:#e94560;--accent2:#f5a623;
  --text:#e8e8e8;--muted:#8899aa;--green:#4ecca3;--border:#2a3a5e;
  --radius:12px;--shadow:0 4px 20px rgba(0,0,0,.3);
}
body.light{
  --bg:#f5f5f7;--surface:#ffffff;--card:#e8edf2;--accent:#e94560;--accent2:#d4941e;
  --text:#1a1a2e;--muted:#5a6a7a;--green:#2da882;--border:#d0d5dd;
  --shadow:0 4px 20px rgba(0,0,0,.08);
}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:var(--bg);color:var(--text);min-height:100vh;padding-bottom:80px}
.container{max-width:480px;margin:0 auto;padding:16px}

/* Header */
.header{position:relative;text-align:center;padding:20px 0 10px}
.header h1{font-size:1.6rem;background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;font-weight:800;letter-spacing:-0.5px}
.header p{color:var(--muted);font-size:.8rem;margin-top:2px}

/* Theme toggle */
.theme-toggle{position:absolute;top:20px;right:16px;background:none;border:1px solid var(--border);border-radius:50%;width:36px;height:36px;font-size:1.1rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:.2s}
.theme-toggle:hover{border-color:var(--accent)}

/* Tabs */
.tabs{display:flex;gap:4px;margin:16px 0;background:var(--surface);border-radius:var(--radius);padding:4px}
.tab{flex:1;text-align:center;padding:10px 4px;border-radius:10px;font-size:.8rem;font-weight:600;cursor:pointer;transition:.2s;color:var(--muted)}
.tab.active{background:var(--card);color:var(--text);box-shadow:var(--shadow)}

/* Cards */
.card{background:var(--surface);border-radius:var(--radius);padding:16px;margin-bottom:12px;border:1px solid var(--border)}
.card h3{font-size:.9rem;color:var(--accent2);margin-bottom:10px;display:flex;align-items:center;gap:6px}

/* Forms */
label{display:block;font-size:.75rem;color:var(--muted);margin-bottom:4px;margin-top:10px}
label:first-child{margin-top:0}
input,select,textarea{width:100%;padding:10px 12px;background:var(--bg);border:1px solid var(--border);border-radius:8px;color:var(--text);font-size:.9rem;outline:none;transition:.2s}
input:focus,select:focus,textarea:focus{border-color:var(--accent)}
textarea{resize:vertical;min-height:60px}
select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238899aa'%3E%3Cpath d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center}

.row{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.row3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px}

/* Yield display */
.yield-display{text-align:center;padding:16px;background:linear-gradient(135deg,var(--card),var(--surface));border-radius:var(--radius);margin:12px 0}
.yield-display .number{font-size:2.4rem;font-weight:800;color:var(--green)}
.yield-display .label{font-size:.75rem;color:var(--muted)}

/* Buttons */
.btn{display:block;width:100%;padding:14px;border:none;border-radius:var(--radius);font-size:1rem;font-weight:700;cursor:pointer;transition:.2s}
.btn-primary{background:linear-gradient(135deg,var(--accent),#c73e54);color:#fff}
.btn-primary:active{transform:scale(.98)}
.btn-secondary{background:var(--card);color:var(--text);border:1px solid var(--border)}
.btn-danger{background:transparent;color:var(--accent);border:1px solid var(--accent);font-size:.85rem;padding:10px}
.btn+.btn{margin-top:8px}

/* Stats grid */
.stats{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.stat{background:var(--surface);border-radius:var(--radius);padding:14px;text-align:center;border:1px solid var(--border)}
.stat .value{font-size:1.5rem;font-weight:800;color:var(--green)}
.stat .label{font-size:.7rem;color:var(--muted);margin-top:2px}
.stat.wide{grid-column:span 2}

/* Session list */
.session-item{background:var(--surface);border-radius:var(--radius);padding:14px;margin-bottom:8px;border:1px solid var(--border);cursor:pointer;transition:.2s}
.session-item:active{transform:scale(.98)}
.session-item .top{display:flex;justify-content:space-between;align-items:center}
.session-item .strain{font-weight:700;font-size:.95rem}
.session-item .yield-badge{background:var(--green);color:#000;padding:3px 10px;border-radius:20px;font-weight:800;font-size:.85rem}
.session-item .meta{font-size:.75rem;color:var(--muted);margin-top:4px;display:flex;gap:8px;flex-wrap:wrap}
.session-item .meta span{display:flex;align-items:center;gap:3px}

/* Reference cards */
.ref-card{background:var(--bg);border-radius:8px;padding:12px;margin-bottom:8px}
.ref-card h4{font-size:.85rem;color:var(--accent2);margin-bottom:6px}
.ref-card table{width:100%;font-size:.75rem;border-collapse:collapse}
.ref-card th{text-align:left;color:var(--muted);padding:4px 6px;border-bottom:1px solid var(--border)}
.ref-card td{padding:4px 6px;border-bottom:1px solid rgba(42,58,94,.3)}

/* Chip selectors */
.chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:4px}
.chip{padding:6px 12px;border-radius:20px;font-size:.75rem;background:var(--bg);border:1px solid var(--border);cursor:pointer;transition:.2s;color:var(--muted)}
.chip.selected{background:var(--accent);border-color:var(--accent);color:#fff}

/* Color chips */
.color-chips{display:flex;gap:6px;margin-top:4px}
.color-chip{width:32px;height:32px;border-radius:50%;cursor:pointer;border:2px solid transparent;transition:.2s}
.color-chip.selected{border-color:var(--text);transform:scale(1.15)}
.color-chip[data-color="pale-yellow"]{background:#f5e6a8}
.color-chip[data-color="golden"]{background:#daa520}
.color-chip[data-color="amber"]{background:#cc7722}
.color-chip[data-color="dark"]{background:#8b4513}

/* Photo preview */
.photo-preview{max-width:120px;max-height:120px;border-radius:8px;margin-top:8px;display:none}
.photo-preview.has-photo{display:block}

/* Page sections */
.page{display:none}
.page.active{display:block}

/* Filter bar */
.filter-bar{display:flex;gap:8px;margin-bottom:12px}
.filter-bar select{flex:1;font-size:.8rem;padding:8px}

/* Empty state */
.empty{text-align:center;padding:40px 20px;color:var(--muted)}
.empty .icon{font-size:3rem;margin-bottom:12px}
.empty p{font-size:.9rem}

/* Toast */
.toast{position:fixed;bottom:90px;left:50%;transform:translateX(-50%);background:var(--green);color:#000;padding:10px 24px;border-radius:20px;font-weight:700;font-size:.85rem;z-index:100;opacity:0;transition:.3s;pointer-events:none}
.toast.show{opacity:1}

/* Detail view */
.detail-actions{display:flex;gap:8px;margin-top:12px}
.detail-actions .btn{flex:1}

/* Nav */
.nav{position:fixed;bottom:0;left:0;right:0;background:var(--surface);border-top:1px solid var(--border);display:flex;z-index:50;padding:8px 0 env(safe-area-inset-bottom,8px)}
.nav-item{flex:1;text-align:center;padding:8px 0;cursor:pointer;color:var(--muted);font-size:.65rem;font-weight:600;transition:.2s}
.nav-item.active{color:var(--accent)}
.nav-item .icon{font-size:1.3rem;display:block;margin-bottom:2px}

/* Animations */
@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
.page.active{animation:fadeIn .2s ease}

/* Modal overlay */
.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.6);z-index:200;padding:16px;overflow-y:auto}
.modal-overlay .card{position:relative}

/* Inline help tooltips */
.help-btn{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;border-radius:50%;border:1px solid var(--border);background:none;color:var(--muted);font-size:.65rem;cursor:pointer;margin-left:4px;vertical-align:middle;padding:0;font-weight:700;line-height:1}
.help-btn:hover{border-color:var(--accent2);color:var(--accent2)}
.help-text{display:none;font-size:.75rem;color:var(--muted);background:var(--bg);padding:8px 10px;border-radius:6px;margin:4px 0 6px;border-left:2px solid var(--accent2);line-height:1.4}
.help-text.visible{display:block}

/* Field validation errors */
.field-error{display:none;font-size:.7rem;color:var(--accent);margin-top:2px}

/* Timer */
.timer-running{animation:timerPulse 1s ease infinite}
@keyframes timerPulse{0%,100%{opacity:1}50%{opacity:.7}}
.timer-done{color:var(--accent)!important;animation:timerFlash .5s ease 3}
@keyframes timerFlash{0%,100%{opacity:1}50%{opacity:.3}}

/* Effects multi-select chips */
#f-effects .chip{transition:.2s}

/* Drill-down overlay */
.drill-down{margin-top:8px;background:var(--bg);border-radius:8px;padding:10px;max-height:200px;overflow-y:auto}
.drill-down .session-item{margin-bottom:4px;padding:10px}

/* Focus visibility */
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}