@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&display=swap');
:root {
  --navy:#2B3370;--navy-deep:#1E2555;--navy-light:#3D4A8C;--lime:#C5D82D;--lime-soft:#D4E34E;
  --lime-muted:rgba(197,216,45,0.15);--lime-glow:rgba(197,216,45,0.25);
  --bg:#F7F7F5;--surface:#FFFFFF;--border:rgba(43,51,112,0.08);
  --text:#1A1A2E;--text-2:#4A4A5E;--text-3:#8888A0;
  --gradient:linear-gradient(135deg,#2B3370 0%,#3D4A8C 40%,#C5D82D 100%);
  --gradient-navy:linear-gradient(135deg,#1E2555 0%,#2B3370 50%,#3D4A8C 100%);
  --radius:16px;--radius-sm:8px;
  --shadow-1:0 1px 3px rgba(43,51,112,0.06),0 1px 2px rgba(0,0,0,0.03);
  --shadow-2:0 4px 14px rgba(43,51,112,0.08),0 1px 4px rgba(0,0,0,0.04);
  --shadow-3:0 10px 40px rgba(43,51,112,0.12),0 2px 10px rgba(0,0,0,0.05);
  --ease:cubic-bezier(0.16,1,0.3,1);--ease-bounce:cubic-bezier(0.34,1.56,0.64,1);
  --font:'Plus Jakarta Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{font-size:16px;-webkit-font-smoothing:antialiased;scroll-behavior:smooth}

body{font-family:var(--font);color:var(--text);line-height:1.5;min-height:100vh;display:flex;flex-direction:column;background:#EDEDEA;position:relative;overflow-x:hidden}

/* Bokeh */
.bokeh-bg{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden;background:linear-gradient(160deg,#EEEEE8 0%,#F4F4F0 40%,#E8EAE0 100%)}
.bokeh-bg span{position:absolute;border-radius:50%;filter:blur(45px);opacity:0;animation:bokehFloat linear infinite}
.bokeh-bg span:nth-child(1){width:320px;height:320px;background:rgba(43,51,112,0.18);left:10%;top:20%;animation-duration:25s}
.bokeh-bg span:nth-child(2){width:240px;height:240px;background:rgba(197,216,45,0.22);left:60%;top:10%;animation-duration:30s;animation-delay:-5s}
.bokeh-bg span:nth-child(3){width:380px;height:380px;background:rgba(43,51,112,0.12);left:70%;top:60%;animation-duration:35s;animation-delay:-10s}
.bokeh-bg span:nth-child(4){width:200px;height:200px;background:rgba(197,216,45,0.18);left:20%;top:70%;animation-duration:28s;animation-delay:-8s}
.bokeh-bg span:nth-child(5){width:280px;height:280px;background:rgba(61,74,140,0.14);left:45%;top:40%;animation-duration:32s;animation-delay:-15s}
.bokeh-bg span:nth-child(6){width:180px;height:180px;background:rgba(197,216,45,0.20);left:85%;top:30%;animation-duration:22s;animation-delay:-3s}
.bokeh-bg span:nth-child(7){width:300px;height:300px;background:rgba(43,51,112,0.10);left:5%;top:50%;animation-duration:38s;animation-delay:-20s}
.bokeh-bg span:nth-child(8){width:260px;height:260px;background:rgba(212,227,78,0.16);left:50%;top:80%;animation-duration:26s;animation-delay:-12s}
@keyframes bokehFloat{0%{opacity:0;transform:translate(0,0) scale(0.8)}10%{opacity:1}50%{transform:translate(40px,-60px) scale(1.2)}90%{opacity:1}100%{opacity:0;transform:translate(-30px,50px) scale(0.9)}}

.site-header,.main-content,.site-footer,.install-gate{position:relative;z-index:1}

/* Install gate */
.install-gate{position:fixed;inset:0;z-index:1000;background:var(--gradient-navy);display:flex;align-items:center;justify-content:center;padding:32px;overflow:hidden}
.install-gate::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 30% 70%,rgba(197,216,45,0.15) 0%,transparent 60%),radial-gradient(circle at 70% 20%,rgba(61,74,140,0.2) 0%,transparent 50%)}
.install-gate.hidden{display:none}
.install-card{background:var(--surface);border-radius:24px;padding:48px 40px;max-width:420px;width:100%;text-align:center;box-shadow:0 24px 80px rgba(0,0,0,0.2);animation:cardIn 0.6s var(--ease) both;position:relative;z-index:1}
@keyframes cardIn{from{opacity:0;transform:translateY(30px) scale(0.96)}to{opacity:1;transform:translateY(0) scale(1)}}
.install-logo{width:100px;height:auto;margin:0 auto 20px;display:block}
.install-card h2{font-size:1.4rem;font-weight:700;margin-bottom:6px;color:var(--navy)}
.install-card .install-subtitle{font-size:0.95rem;font-weight:600;color:var(--navy-light);margin-bottom:16px}
.install-card p{font-size:0.85rem;color:var(--text-2);margin-bottom:28px;line-height:1.6}
.install-btn{font-family:var(--font);font-size:1rem;font-weight:700;padding:14px 36px;border:none;border-radius:12px;background:var(--gradient-navy);color:#fff;cursor:pointer;display:inline-flex;align-items:center;gap:10px;transition:all 0.2s var(--ease);box-shadow:0 4px 20px rgba(43,51,112,0.3)}
.install-btn:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(43,51,112,0.4)}
.install-steps{margin-top:24px;padding-top:24px;border-top:1px solid var(--border);font-size:0.78rem;color:var(--text-3);line-height:1.8}
.install-steps strong{color:var(--text-2)}
.install-skip{display:block;margin-top:16px;font-size:0.72rem;color:var(--text-3);background:none;border:none;cursor:pointer;text-decoration:underline;font-family:var(--font)}

/* Header */
.site-header{background:rgba(255,255,255,0.7);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}
.header-inner{max-width:800px;margin:0 auto;padding:10px 24px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{display:flex;align-items:center;gap:12px}
.brand-logo{height:38px;width:auto}
.brand-text h1{font-size:0.92rem;font-weight:700;color:var(--navy);letter-spacing:-0.02em}
.brand-meta{font-size:0.62rem;color:var(--text-3);font-weight:500}
.privacy-pill{padding:5px 14px;border-radius:100px;background:var(--lime-muted);color:var(--navy);font-size:0.62rem;font-weight:700;letter-spacing:0.02em;display:flex;align-items:center;gap:5px;border:1px solid rgba(197,216,45,0.2)}

/* Main */
.main-content{flex:1;max-width:800px;margin:0 auto;padding:24px 24px 40px;width:100%;display:flex;flex-direction:column;gap:20px}

/* Cards */
.card{background:rgba(255,255,255,0.8);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,0.5);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-1);transition:box-shadow 0.3s var(--ease),transform 0.3s var(--ease)}
.card:hover{box-shadow:var(--shadow-2);transform:translateY(-1px)}
.card-label{font-size:0.62rem;font-weight:700;text-transform:uppercase;letter-spacing:0.1em;color:var(--navy);margin-bottom:18px;display:flex;align-items:center;gap:7px}
.card-label::before{content:'';display:block;width:8px;height:8px;border-radius:50%;background:var(--lime);box-shadow:0 0 6px var(--lime-glow)}

/* Form */
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
.field-row[hidden]{display:none!important}
.field-group{display:flex;flex-direction:column;gap:5px}
.field-group label{font-size:0.78rem;font-weight:600;color:var(--navy)}
.field-group select,.field-group input{font-family:var(--font);font-size:0.88rem;font-weight:500;padding:11px 14px;border:1.5px solid rgba(43,51,112,0.12);border-radius:var(--radius-sm);background:rgba(255,255,255,0.6);color:var(--text);outline:none;transition:all 0.2s var(--ease);-webkit-appearance:none;appearance:none}
.field-group select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10'%3E%3Cpath d='M2 3.5L5 6.5L8 3.5' stroke='%232B3370' stroke-width='1.5' stroke-linecap='round' fill='none'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:32px}
.field-group select:focus,.field-group input:focus{border-color:var(--navy);box-shadow:0 0 0 3px rgba(43,51,112,0.1);background:#fff}
.field-group input::placeholder{color:var(--text-3)}
.age-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.form-actions{display:flex;gap:10px;padding-top:8px}

/* Buttons */
.btn{font-family:var(--font);font-size:0.88rem;font-weight:700;padding:12px 28px;border:none;border-radius:var(--radius-sm);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;line-height:1;transition:all 0.2s var(--ease)}
.btn:disabled{opacity:0.5;cursor:not-allowed}
.btn-primary{background:var(--gradient-navy);color:#fff;box-shadow:0 4px 16px rgba(43,51,112,0.2)}
.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 8px 28px rgba(43,51,112,0.3)}
.btn-primary:active:not(:disabled){transform:translateY(0)}
.btn-secondary{background:rgba(255,255,255,0.6);color:var(--text-2);border:1.5px solid rgba(43,51,112,0.1)}
.btn-secondary:hover:not(:disabled){background:rgba(255,255,255,0.9)}
.btn-icon{font-size:1.1rem;line-height:1}

/* Error */
.error-box{background:#FEF2F2;color:#DC2626;border:1px solid #FECACA;border-radius:var(--radius-sm);padding:12px 16px;font-size:0.85rem;font-weight:500;line-height:1.5;margin-top:12px;animation:shake 0.4s var(--ease)}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-6px)}75%{transform:translateX(6px)}}

/* Results */
.results-grid{display:grid;grid-template-columns:1fr 1fr 1fr;grid-template-areas:"bmi centile zscore""chart chart chart""cat cat interp""actions actions actions";gap:16px}
.tile-bmi{grid-area:bmi}.tile-centile{grid-area:centile}.tile-zscore{grid-area:zscore}
.tile-chart{grid-area:chart}.tile-cat{grid-area:cat}.tile-interp{grid-area:interp}.tile-actions{grid-area:actions}
.tile-metric{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;min-height:140px;position:relative;overflow:hidden}
.tile-metric::after{content:'';position:absolute;top:-30px;right:-30px;width:80px;height:80px;border-radius:50%;background:var(--lime);opacity:0.08;transition:transform 0.4s var(--ease)}
.tile-metric:hover::after{transform:scale(2)}
.metric-value{font-size:3rem;font-weight:800;line-height:1;letter-spacing:-0.04em;margin-bottom:6px;font-variant-numeric:tabular-nums;color:var(--navy)}
.metric-unit{font-size:0.7rem;color:var(--text-3);font-weight:600;text-transform:uppercase;letter-spacing:0.05em}
.tile-cat{display:flex;align-items:center;gap:16px}
.cat-badge{width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.6rem;flex-shrink:0;font-weight:700;box-shadow:var(--shadow-1);transition:transform 0.3s var(--ease-bounce)}
.cat-badge:hover{transform:scale(1.1) rotate(-3deg)}
.cat-text{display:flex;flex-direction:column;gap:3px}
.cat-label{font-size:1.15rem;font-weight:800;line-height:1.2}
.cat-desc{font-size:0.78rem;color:var(--text-2)}
.tile-interp{font-size:0.85rem;line-height:1.7;color:var(--text-2)}
.tile-chart{overflow:hidden}
.chart-note{font-size:0.62rem;color:var(--text-3);text-align:center;margin-top:8px;font-style:italic}
.tile-actions{display:flex;flex-direction:column;gap:14px}

/* Unit toggle */
.card-label-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.card-label-row .card-label{margin-bottom:0}
.unit-toggle{display:flex;background:rgba(43,51,112,0.06);border-radius:var(--radius-sm);padding:3px;gap:2px}
.unit-btn{font-family:var(--font);font-size:0.72rem;font-weight:600;padding:6px 14px;border:none;border-radius:6px;cursor:pointer;background:transparent;color:var(--text-3);transition:all 0.2s var(--ease)}
.unit-btn.active{background:var(--surface);color:var(--navy);box-shadow:var(--shadow-1)}
.unit-btn:hover:not(.active){color:var(--text-2)}

/* Ref field */
.ref-field{width:100%}
.ref-field label{display:flex;align-items:baseline;gap:6px;font-size:0.78rem;font-weight:600;color:var(--navy)}
.ref-field input{font-family:var(--font);font-size:0.88rem;font-weight:500;padding:11px 14px;border:1.5px solid rgba(43,51,112,0.12);border-radius:var(--radius-sm);background:rgba(255,255,255,0.6);color:var(--text);outline:none;transition:all 0.2s var(--ease);width:100%;margin-top:5px}
.ref-field input:focus{border-color:var(--navy);box-shadow:0 0 0 3px rgba(43,51,112,0.1);background:#fff}
.ref-field input::placeholder{color:var(--text-3)}
.action-btns{display:flex;gap:12px}

[data-stagger]{opacity:0;transform:translateY(20px) scale(0.97)}
.tile-enter{animation:tileIn 0.5s var(--ease) forwards}
@keyframes tileIn{to{opacity:1;transform:translateY(0) scale(1)}}

.site-footer{border-top:1px solid var(--border);padding:20px 24px;margin-top:auto;position:relative;z-index:1}
.footer-inner{max-width:800px;margin:0 auto}
.footer-method{font-size:0.68rem;color:var(--text-3);line-height:1.6}
.footer-org{font-size:0.68rem;color:var(--text-3);margin-top:4px;font-weight:600}

@media(max-width:900px){.results-grid{grid-template-columns:1fr 1fr;grid-template-areas:"bmi centile""zscore zscore""chart chart""cat cat""interp interp""actions actions"}.action-btns{flex-direction:row}.action-btns .btn{flex:1}}
@media(max-width:640px){.header-inner{padding:8px 16px}.privacy-pill span{display:none}.brand-text h1{font-size:0.85rem}.main-content{padding:16px 16px 32px;gap:14px}.card{padding:22px 18px;border-radius:14px}.field-row{grid-template-columns:1fr;gap:14px}.age-row{grid-template-columns:1fr 1fr}.form-actions{flex-direction:column}.form-actions .btn{width:100%}.results-grid{grid-template-columns:1fr;grid-template-areas:"bmi""centile""zscore""chart""cat""interp""actions"}.tile-metric{min-height:110px}.metric-value{font-size:2.5rem}.action-btns{flex-direction:column}.action-btns .btn{width:100%}.install-card{padding:36px 24px}.bokeh-bg span{filter:blur(40px)}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:0.01ms!important;transition-duration:0.01ms!important}[data-stagger]{opacity:1;transform:none}.bokeh-bg span{animation:none;opacity:0.5}}
@media print{.site-header,.site-footer,.form-actions,.tile-actions,.bento-input,.install-gate,.bokeh-bg{display:none!important}body{background:#fff}.card{background:#fff;border:1px solid #ccc;break-inside:avoid;box-shadow:none;backdrop-filter:none}}