:root{--gold:#E8CC54;--bg:#121212;--bg-2:#1a1a1a;--muted:#B2B2B2;--font:'IRANSans',sans-serif}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
.btb-container{max-width:1200px;margin:0 auto;padding:0 24px}
.btb-hero{padding:100px 0;border-bottom:1px solid rgba(255,255,255,0.06)}
.btb-hero__inner{display:grid;grid-template-columns:1fr 420px;gap:64px;align-items:center}
.btb-hero__label{display:inline-block;font-size:12px;letter-spacing:0.12em;color:var(--gold);text-transform:uppercase;margin-bottom:20px;border:1px solid rgba(232,204,84,0.3);padding:4px 14px;border-radius:20px}
.btb-hero h1{font-size:clamp(36px,5vw,56px);font-weight:700;line-height:1.15;margin-bottom:20px;color:#fff}
.btb-hero h1 span{color:var(--gold)}
.btb-hero__desc{font-size:17px;color:var(--muted);line-height:1.75;margin-bottom:36px;max-width:520px}
.btb-hero__cta{display:flex;gap:16px;align-items:center;flex-wrap:wrap}
.btb-hero__card{background:var(--bg-2);border:1px solid rgba(232,204,84,0.15);border-radius:16px;padding:32px}
.btb-hero__card-title{font-size:13px;color:var(--muted);margin-bottom:20px;text-transform:uppercase;letter-spacing:0.08em}
.btb-hero__card ul{list-style:none}
.btb-hero__card ul li{display:flex;align-items:flex-start;gap:12px;padding:10px 0;font-size:14px;color:#e0e0e0;border-bottom:1px solid rgba(255,255,255,0.05)}
.btb-hero__card ul li:last-child{border-bottom:none}
.btb-hero__card ul li::before{content:'';width:6px;height:6px;background:var(--gold);border-radius:50%;flex-shrink:0;margin-top:6px}
.btb-who{padding:100px 0}
.btb-section-label{font-size:12px;letter-spacing:0.1em;color:var(--gold);text-transform:uppercase;margin-bottom:12px}
.btb-section-title{font-size:clamp(26px,3vw,38px);font-weight:700;margin-bottom:48px;line-height:1.25}
.btb-who__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:40px}
.btb-who__card{background:var(--bg-2);border:1px solid rgba(255,255,255,0.06);border-top:3px solid transparent;border-radius:12px;padding:28px;transition:border-color 0.2s,transform 0.2s}
.btb-who__card:hover{border-top-color:var(--gold);transform:translateY(-3px)}
.btb-who__card h3{font-size:17px;font-weight:600;margin-bottom:12px;color:#fff}
.btb-who__card p{font-size:14px;color:var(--muted);line-height:1.7}
.btb-who__note{text-align:center;font-size:15px;color:var(--muted);padding:24px;background:rgba(232,204,84,0.04);border:1px solid rgba(232,204,84,0.1);border-radius:10px}
.btb-measures{padding:100px 0;background:var(--bg-2)}
.btb-measures__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.btb-measures__card{background:var(--bg);border:1px solid rgba(255,255,255,0.06);border-radius:12px;padding:28px 24px;transition:border-color 0.2s,transform 0.2s}
.btb-measures__card:hover{border-color:rgba(232,204,84,0.22);transform:translateY(-3px)}
.btb-measures__num{font-size:32px;font-weight:700;color:var(--gold);opacity:0.35;margin-bottom:16px}
.btb-measures__card h3{font-size:16px;font-weight:600;margin-bottom:10px}
.btb-measures__card p{font-size:13px;color:var(--muted);line-height:1.65}
.btb-quiz{padding:100px 0}
.btb-quiz__header{margin-bottom:48px}
.btb-quiz__progress-wrap{margin-bottom:48px;background:rgba(255,255,255,0.05);border-radius:8px;overflow:hidden;height:4px}
.btb-quiz__progress-bar{height:100%;background:var(--gold);border-radius:8px;transition:width 0.4s ease;width:0%}
.btb-quiz__progress-text{font-size:13px;color:var(--muted);margin-bottom:10px;display:flex;justify-content:space-between}
.btb-quiz__step{display:none}
.btb-quiz__step.active{display:block}
.btb-quiz__cat-header{display:flex;align-items:center;gap:16px;margin-bottom:32px;padding-bottom:20px;border-bottom:1px solid rgba(255,255,255,0.06)}
.btb-quiz__cat-num{width:40px;height:40px;border-radius:50%;background:rgba(232,204,84,0.1);border:1px solid rgba(232,204,84,0.3);color:var(--gold);font-size:15px;font-weight:600;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.btb-quiz__cat-info h3{font-size:18px;font-weight:600}
.btb-quiz__cat-info span{font-size:13px;color:var(--muted)}
.btb-quiz__question{background:var(--bg-2);border:1px solid rgba(255,255,255,0.06);border-radius:12px;padding:24px 28px;margin-bottom:12px;transition:border-color 0.2s}
.btb-quiz__question:hover{border-color:rgba(232,204,84,0.15)}
.btb-quiz__q-text{font-size:15px;color:#e0e0e0;margin-bottom:16px;line-height:1.6}
.btb-quiz__options{display:flex;gap:10px}
.btb-quiz__opt{flex:1;background:transparent;border:1px solid rgba(255,255,255,0.12);color:var(--muted);border-radius:8px;padding:9px 16px;font-size:13px;font-family:var(--font);cursor:pointer;transition:all 0.15s;text-align:center}
.btb-quiz__opt:hover{border-color:rgba(232,204,84,0.4);color:var(--gold)}
.btb-quiz__opt.selected-yes{background:rgba(232,204,84,0.12);border-color:var(--gold);color:var(--gold);font-weight:600}
.btb-quiz__opt.selected-some{background:rgba(232,204,84,0.06);border-color:rgba(232,204,84,0.4);color:#c9ab40}
.btb-quiz__opt.selected-no{background:rgba(255,255,255,0.04);border-color:rgba(255,255,255,0.2);color:var(--muted)}
.btb-quiz__nav{display:flex;justify-content:space-between;align-items:center;margin-top:32px}
.btb-quiz__score-live{font-size:13px;color:var(--muted);background:rgba(232,204,84,0.06);border:1px solid rgba(232,204,84,0.15);padding:6px 16px;border-radius:20px}
.btb-quiz__score-live span{color:var(--gold);font-weight:600}
.btb-result{padding:100px 0;display:none}
.btb-result.visible{display:block}
.btb-result__inner{max-width:780px;margin:0 auto;text-align:center}
.btb-result__gauge-wrap{margin:0 auto 48px;max-width:300px}
.btb-result__gauge{width:100%}
.btb-result__level{display:inline-block;font-size:14px;padding:6px 20px;border-radius:20px;background:rgba(232,204,84,0.1);border:1px solid rgba(232,204,84,0.3);color:var(--gold);margin-bottom:24px}
.btb-result__desc{font-size:16px;color:var(--muted);line-height:1.75;margin-bottom:48px}
.btb-result__bars{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-bottom:56px;text-align:right}
.btb-result__bar-label{font-size:13px;color:var(--muted);margin-bottom:8px;display:flex;justify-content:space-between}
.btb-result__bar-track{height:6px;background:rgba(255,255,255,0.08);border-radius:6px;overflow:hidden}
.btb-result__bar-fill{height:100%;background:var(--gold);border-radius:6px;width:0%;transition:width 1s ease 0.3s}
.btb-paths{padding:80px 0;background:var(--bg-2)}
.btb-paths__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.btb-paths__card{background:var(--bg);border:1px solid rgba(255,255,255,0.06);border-radius:12px;padding:28px;transition:all 0.3s;opacity:0.5}
.btb-paths__card.active-path{border-color:var(--gold);opacity:1;transform:translateY(-4px)}
.btb-paths__card.show-all{opacity:1}
.btb-paths__range{font-size:11px;color:var(--gold);letter-spacing:0.08em;margin-bottom:14px;background:rgba(232,204,84,0.08);display:inline-block;padding:3px 10px;border-radius:10px}
.btb-paths__card h3{font-size:17px;font-weight:600;margin-bottom:12px}
.btb-paths__card p{font-size:13px;color:var(--muted);line-height:1.65}
.btb-form-section{padding:100px 0}
.btb-form-wrap{max-width:680px;margin:0 auto}
.btb-form__score-summary{background:rgba(232,204,84,0.06);border:1px solid rgba(232,204,84,0.2);border-radius:10px;padding:16px 20px;margin-bottom:28px;font-size:14px;color:var(--muted);display:none}
.btb-form__score-summary.visible{display:block}
.btb-form__score-summary strong{color:var(--gold)}
.btb-form__grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.btb-form__field{display:flex;flex-direction:column;gap:8px}
.btb-form__field.full{grid-column:1 / -1}
.btb-form__field label{font-size:13px;color:var(--muted)}
.btb-form__field input,.btb-form__field textarea{background:var(--bg-2);border:1px solid rgba(255,255,255,0.1);border-radius:8px;color:#fff;font-family:var(--font);font-size:14px;padding:12px 16px;transition:border-color 0.2s;outline:none;width:100%}
.btb-form__field input:focus,.btb-form__field textarea:focus{border-color:rgba(232,204,84,0.5)}
.btb-form__field textarea{resize:vertical;min-height:100px}
.btb-form__submit{margin-top:24px;text-align:center}
.btb-form__msg{margin-top:16px;font-size:14px;text-align:center;display:none}
.btb-form__msg.success{color:var(--gold);display:block}
.btb-form__msg.error{color:#e24b4a;display:block}
.btb-cta{padding:100px 0;text-align:center;border-top:1px solid rgba(255,255,255,0.06)}
.btb-cta h2{font-size:clamp(28px,3.5vw,44px);font-weight:700;margin-bottom:16px}
.btb-cta p{font-size:16px;color:var(--muted);margin-bottom:36px}
.btn.btn-primary{display:inline-flex;align-items:center;gap:8px;background:transparent;color:var(--gold);font-family:var(--font);font-size:14px;font-weight:600;padding:13px 30px;border-radius:6px;border:1.5px solid var(--gold);cursor:pointer;text-decoration:none;transition:all 0.25s ease}
.btn.btn-primary:hover{background:var(--gold);color:#121212;transform:translateY(-2px)}
.btn-outline{display:inline-flex;align-items:center;background:transparent;color:var(--gold);font-family:var(--font);font-size:14px;font-weight:600;padding:13px 28px;border-radius:8px;border:1px solid rgba(232,204,84,0.4);cursor:pointer;text-decoration:none;transition:all 0.2s}
.btn-outline:hover{background:rgba(232,204,84,0.08);border-color:var(--gold)}
.btn-next{background:var(--gold);color:#121212;font-family:var(--font);font-size:14px;font-weight:700;padding:12px 28px;border-radius:8px;border:none;cursor:pointer;transition:opacity 0.2s}
.btn-next:hover{opacity:0.88}
.btn-prev{background:transparent;color:var(--muted);font-family:var(--font);font-size:14px;padding:12px 20px;border-radius:8px;border:1px solid rgba(255,255,255,0.1);cursor:pointer;transition:all 0.2s}
.btn-prev:hover{color:#fff;border-color:rgba(255,255,255,0.3)}
@media(max-width:960px){.btb-hero__inner{grid-template-columns:1fr}.btb-who__grid{grid-template-columns:1fr}.btb-measures__grid{grid-template-columns:repeat(2,1fr)}.btb-paths__grid{grid-template-columns:1fr}.btb-result__bars{grid-template-columns:1fr}}
@media(max-width:600px){.btb-hero,.btb-who,.btb-measures,.btb-quiz,.btb-result,.btb-paths,.btb-form-section,.btb-cta{padding:64px 0}.btb-measures__grid{grid-template-columns:1fr}.btb-form__grid{grid-template-columns:1fr}.btb-quiz__options{flex-direction:column}}