/* Roboto – latin */
@font-face { font-family:'Roboto'; font-weight:300 400 700; font-style:normal; font-display:swap;
    unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
    src: url('/fonts/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBA.woff2') format('woff2'); }
/* Roboto – latin-ext */
@font-face { font-family:'Roboto'; font-weight:300 400 700; font-style:normal; font-display:swap;
    unicode-range: U+0100-02AF,U+0304,U+0308,U+0329,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
    src: url('/fonts/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3KUBGEe.woff2') format('woff2'); }
/* Roboto – cyrillic */
@font-face { font-family:'Roboto'; font-weight:300 400 700; font-style:normal; font-display:swap;
    unicode-range: U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116;
    src: url('/fonts/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3iUBGEe.woff2') format('woff2'); }
/* Roboto – greek */
@font-face { font-family:'Roboto'; font-weight:300 400 700; font-style:normal; font-display:swap;
    unicode-range: U+0370-0377,U+037A-037F,U+0384-038A,U+038C,U+038E-03A1,U+03A3-03FF;
    src: url('/fonts/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3-UBGEe.woff2') format('woff2'); }
/* Roboto Slab – latin */
@font-face { font-family:'Roboto Slab'; font-weight:400 700; font-style:normal; font-display:swap;
    unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
    src: url('/fonts/BngMUXZYTXPIvIBgJJSb6ufN5qU.woff2') format('woff2'); }
/* Roboto Slab – latin-ext */
@font-face { font-family:'Roboto Slab'; font-weight:400 700; font-style:normal; font-display:swap;
    unicode-range: U+0100-02AF,U+0304,U+0308,U+0329,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
    src: url('/fonts/BngMUXZYTXPIvIBgJJSb6ufD5qW54A.woff2') format('woff2'); }
/* Roboto Slab – cyrillic */
@font-face { font-family:'Roboto Slab'; font-weight:400 700; font-style:normal; font-display:swap;
    unicode-range: U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116;
    src: url('/fonts/BngMUXZYTXPIvIBgJJSb6ufJ5qW54A.woff2') format('woff2'); }

:root{
    --hl-dark:#215a8b;--hl-main:#327bb8;--hl-light:#93bfe7;
    --hl-red:#e70800;--hl-gray:#5d676d;
    --bg:#f0f4f8;--surface:#fff;--surface2:#e8f0f8;--border:#ccdaec;
    --text:#1a2630;--muted:#5d676d;--dim:#99aab8;
    --r:10px;
}
*{box-sizing:border-box;margin:0;padding:0;}
body{background:var(--bg);color:var(--text);font-family:"Roboto",sans-serif;min-height:100vh;font-size:16px;line-height:1.5;}
/* HEADER */
header{background:var(--hl-dark);height:72px;display:flex;align-items:center;padding:0 20px;gap:16px;box-shadow:0 2px 12px rgba(0,0,0,0.3);position:relative;}
.logo-wrap{display:flex;align-items:center;padding-right:16px;border-right:1px solid rgba(255,255,255,0.18);}
.logo-svg{height:40px;width:auto;}
.hdr-spacer{flex:1;}
.hdr-badge{background:rgba(255,255,255,0.1);border:1px solid rgba(255,255,255,0.2);border-radius:5px;padding:4px 12px;font-size:14px;font-weight:700;color:var(--hl-light);letter-spacing:0.5px;}
.accent-bar{height:3px;background:linear-gradient(90deg,var(--hl-main) 0%,var(--hl-light) 100%);}
/* TOP BAR: lang + units together */
.top-bar{background:var(--hl-dark);border-bottom:1px solid rgba(255,255,255,0.08);padding:7px 20px;display:flex;align-items:center;gap:6px;flex-wrap:wrap;}
.top-bar-sep{width:1px;height:22px;background:rgba(255,255,255,0.15);margin:0 4px;flex-shrink:0;}
.flag-btn{background:none;border:2px solid transparent;border-radius:5px;padding:2px;cursor:pointer;opacity:0.5;transition:opacity .12s,border-color .12s;display:flex;align-items:center;}
.flag-btn:hover{opacity:1;}
.flag-btn.active{opacity:1;border-color:var(--hl-light);}
.flag-btn img{height:22px;width:auto;display:block;}
.unit-sel{background:rgba(255,255,255,0.08);border:1.5px solid rgba(255,255,255,0.18);border-radius:5px;padding:3px 7px;font-size:13px;font-weight:600;color:var(--hl-light);outline:none;cursor:pointer;font-family:inherit;}
.unit-sel:focus{border-color:var(--hl-light);}
.unit-lbl{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:rgba(147,191,231,0.7);}
.lang-tt{position:fixed;background:#1a2630;color:#fff;font-size:12px;padding:3px 8px;border-radius:4px;pointer-events:none;white-space:nowrap;z-index:9999;display:none;}
/* MAIN */
main{max-width:960px;margin:0 auto;padding:22px 16px 64px;}
/* INTRO */
.intro-card{background:linear-gradient(135deg,var(--surface2),var(--surface));border:1px solid var(--hl-light);border-left:4px solid var(--hl-main);border-radius:var(--r);padding:16px 18px;margin-bottom:20px;}
.intro-card h2{font-size:17px;font-weight:700;color:var(--hl-dark);margin-bottom:6px;}
.intro-card p{font-size:14px;color:var(--muted);line-height:1.6;}
.sec-label{font-size:11px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;color:var(--hl-main);margin-bottom:10px;}
/* GOAL */
.goal-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px;margin-bottom:20px;}
.goal-btn{background:var(--surface);border:2px solid var(--border);border-radius:var(--r);padding:15px 16px;cursor:pointer;text-align:left;font-family:inherit;transition:all .12s;position:relative;overflow:hidden;}
.goal-btn::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:transparent;transition:background .12s;}
.goal-btn:hover{border-color:var(--hl-main);background:var(--surface2);}
.goal-btn.active{border-color:var(--hl-main);background:var(--surface2);box-shadow:0 2px 10px rgba(50,123,184,0.15);}
.goal-btn.active::before{background:var(--hl-main);}
.goal-icon{font-size:22px;margin-bottom:5px;}
.goal-title{font-size:15px;font-weight:700;color:var(--hl-dark);display:block;}
.goal-sub{font-size:12px;color:var(--muted);display:block;margin-top:3px;}
/* MODE BUTTONS */
.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:20px;}
.mode-btn{background:var(--surface);border:1.5px solid var(--border);border-radius:var(--r);padding:12px 14px 12px 17px;cursor:pointer;text-align:left;font-family:inherit;position:relative;overflow:hidden;transition:all .12s;}
.mode-btn::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:transparent;transition:background .12s;}
.mode-btn:hover{border-color:var(--hl-main);background:var(--surface2);}
.mode-btn:hover::before{background:var(--hl-light);}
.mode-btn.active{border-color:var(--hl-main);background:var(--surface2);}
.mode-btn.active::before{background:var(--hl-main);}
.mode-icon{font-size:18px;margin-bottom:3px;display:block;}
.mode-title{font-size:14px;font-weight:700;display:block;color:var(--text);}
.mode-btn.active .mode-title{color:var(--hl-dark);}
.mode-sub{font-size:12px;color:var(--muted);display:block;}
/* CARD */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:20px;margin-bottom:14px;box-shadow:0 1px 4px rgba(33,90,139,0.05);}
.card-title{font-size:11px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;color:var(--hl-main);margin-bottom:16px;display:flex;align-items:center;gap:8px;}
.card-title::after{content:"";flex:1;height:1px;background:var(--border);}
/* INPUTS */
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:12px;}
.field-row.triple{grid-template-columns:1fr 1fr 1fr;}
.field{display:flex;flex-direction:column;gap:5px;}
.field label{font-size:11px;font-weight:700;letter-spacing:0.8px;text-transform:uppercase;color:var(--muted);}
.fw{position:relative;display:flex;align-items:center;}
.fw input[type=number]{width:100%;background:var(--bg);border:1.5px solid var(--border);border-radius:6px;padding:10px 62px 10px 12px;color:var(--text);font-family:inherit;font-size:18px;font-weight:700;outline:none;transition:border-color .12s;-moz-appearance:textfield;}
.fw input::-webkit-inner-spin-button,.fw input::-webkit-outer-spin-button{-webkit-appearance:none;}
.fw input:focus{border-color:var(--hl-main);background:#fff;}
.fw .unit{position:absolute;right:10px;font-size:12px;color:var(--dim);font-weight:700;pointer-events:none;}
.hint{font-size:11px;color:var(--dim);}
/* ADVANCED */
.sep{height:1px;background:var(--border);margin:16px 0;}
.adv-toggle{display:flex;align-items:center;gap:8px;cursor:pointer;user-select:none;}
.adv-icon{width:22px;height:22px;border:1.5px solid var(--border);border-radius:4px;display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:900;color:var(--muted);transition:all .12s;flex-shrink:0;}
.adv-icon.open{background:var(--hl-main);border-color:var(--hl-main);color:#fff;}
.adv-label{font-size:13px;font-weight:700;color:var(--muted);}
.adv-panel{display:none;margin-top:16px;}
.adv-panel.open{display:block;}
/* ALERTS */
.alert{border-radius:6px;padding:10px 14px;font-size:13px;font-weight:600;display:flex;gap:8px;align-items:flex-start;margin-bottom:10px;}
.a-warn{background:#fff8e6;border:1px solid #f0c030;color:#7a5800;}
.a-err{background:#fff0f0;border:1px solid var(--hl-red);color:#a80000;}
/* RESULT - TM mode */
.result-card{background:var(--hl-dark);border-radius:var(--r);padding:22px 20px 20px;margin-bottom:14px;box-shadow:0 4px 20px rgba(33,90,139,0.3);}
.res-lbl{font-size:11px;font-weight:700;letter-spacing:1.8px;text-transform:uppercase;color:var(--hl-light);margin-bottom:4px;}
.res-main{display:flex;align-items:flex-end;gap:6px;margin-bottom:18px;}
.res-val{font-size:58px;font-weight:700;color:#fff;line-height:1;letter-spacing:-2px;}
.res-unit{font-size:20px;font-weight:700;color:var(--hl-light);margin-bottom:10px;}
.res-sub{font-size:13px;color:rgba(147,191,231,0.75);margin-top:-12px;margin-bottom:16px;}
.res-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;}
.ri{background:rgba(255,255,255,0.08);border:1px solid rgba(147,191,231,0.2);border-radius:6px;padding:10px 12px;}
.ri-l{font-size:10px;color:var(--hl-light);font-weight:700;letter-spacing:1px;text-transform:uppercase;margin-bottom:3px;}
.ri-v{font-size:16px;font-weight:700;color:#fff;}
/* ALT */
.alt-box{margin-top:12px;padding-top:12px;border-top:1px solid rgba(147,191,231,0.2);}
.alt-lbl{font-size:10px;font-weight:700;letter-spacing:1.2px;text-transform:uppercase;color:rgba(147,191,231,0.65);margin-bottom:8px;}
.alt-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:7px;}
.alt-item{background:rgba(255,255,255,0.04);border:1px solid rgba(147,191,231,0.12);border-radius:5px;padding:8px 10px;}
.alt-il{font-size:10px;color:rgba(147,191,231,0.6);font-weight:700;text-transform:uppercase;letter-spacing:0.8px;margin-bottom:3px;}
.alt-iv{font-size:13px;font-weight:700;color:rgba(255,255,255,0.72);}
/* MIX CARD */
.mix-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:20px;margin-bottom:14px;}
.mix-step{margin-bottom:16px;}
.mix-step-lbl{font-size:11px;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:var(--hl-main);margin-bottom:6px;}
.mix-val{font-size:28px;font-weight:700;color:var(--hl-dark);}
.mix-sub{font-size:13px;color:var(--muted);margin-top:3px;}
.mix-result{background:var(--hl-dark);border-radius:8px;padding:14px 16px;color:#fff;}
.mix-result .mix-step-lbl{color:var(--hl-light);}
.mix-result .mix-val{color:#fff;font-size:24px;}
/* EMPTY */
.empty{background:var(--surface);border:1.5px dashed var(--border);border-radius:var(--r);padding:30px 20px;text-align:center;color:var(--dim);}
.empty-icon{font-size:30px;opacity:0.35;margin-bottom:8px;}
.empty p{font-size:13px;}
/* DISCLAIMER */
.disclaimer{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:16px 18px;margin-top:10px;}
.disc-title{font-size:11px;font-weight:700;letter-spacing:1.2px;text-transform:uppercase;color:var(--dim);margin-bottom:8px;}
.disclaimer p{font-size:12px;color:var(--muted);line-height:1.6;}
.disclaimer a{color:var(--hl-main);text-decoration:none;font-weight:700;}
@media(max-width:520px){
    .goal-grid,.mode-grid{grid-template-columns:1fr;}
    .res-grid{grid-template-columns:1fr 1fr;}
    .alt-grid{grid-template-columns:1fr 1fr;}
    .field-row.triple{grid-template-columns:1fr 1fr;}
    .top-bar{gap:4px;}
}

/* ── HEADER TITLE ──────────────────────────────────────────────── */
.hdr-title{position:absolute;left:50%;top:54%;transform:translate(-50%,-50%);line-height:1;user-select:none;pointer-events:none;}
.hdr-logo-img{height:60px;width:auto;display:block}
.hdr-smart{font-family:"Roboto",sans-serif;font-size:32px;font-weight:700;color:#fff;letter-spacing:-0.5px;}
.hdr-mix{font-family:"Roboto",sans-serif;font-size:32px;font-weight:300;color:var(--hl-light);letter-spacing:1px;}
.hdr-web{font-family:"Roboto",sans-serif;font-size:13px;font-weight:400;color:rgba(147,191,231,0.55);letter-spacing:2px;text-transform:uppercase;margin-left:8px;align-self:center;}
@media(max-width:480px){
    .hdr-logo-img{height:18px;}
    .hdr-smart,.hdr-mix{font-size:22px;}
    .hdr-web{font-size:10px;margin-left:5px;}
    .logo-svg{height:28px;}
}

/* ── TWO COLUMN LAYOUT (Desktop) ────────────────────────────────── */
@media(min-width:900px){
    .layout-wrap{display:grid;grid-template-columns:340px 1fr;gap:24px;align-items:start;}
    .layout-left{position:sticky;top:16px;}
    .layout-right{min-width:0;}
}

/* MIX QUANTITIES */
.mix-qty-list{display:flex;flex-direction:column;gap:12px;margin-bottom:4px;}
.mix-qty-row{display:flex;align-items:baseline;gap:12px;}
.mix-qty-lbl{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:0.8px;color:var(--muted);min-width:100px;}
.mix-qty-val{font-size:28px;font-weight:700;color:var(--hl-dark);}
.card-title{font-size:11px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;color:var(--hl-main);padding-bottom:10px;border-bottom:1px solid var(--border);margin-bottom:16px;}