:root{color-scheme:dark;--bg: #050505;--panel: #121212;--panel-strong: #191919;--panel-border: rgba(255, 255, 255, .1);--text: #ffffff;--muted: #c9c9c9;--subtle: #8f8f8f;--accent: #c41820;--accent-strong: #ec1c24;--accent-soft: rgba(196, 24, 32, .18);--shadow: 0 24px 80px rgba(0, 0, 0, .5);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{margin:0;min-width:320px;background:var(--bg);color:var(--text)}button,input,select{font:inherit}button{-webkit-tap-highlight-color:transparent}.app-shell{position:relative;min-height:100vh;overflow:hidden;background:radial-gradient(circle at top right,rgba(196,24,32,.18),transparent 30rem),linear-gradient(180deg,#090909,#050505 60%,#000);padding:16px}.ambient-grid{position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:42px 42px;-webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.8),transparent 78%);mask-image:linear-gradient(to bottom,rgba(0,0,0,.8),transparent 78%)}.diagnostic-frame{position:relative;width:min(100%,760px);min-height:calc(100vh - 32px);margin:0 auto;display:flex;flex-direction:column;border:1px solid var(--panel-border);border-radius:28px;background:#0a0a0aeb;box-shadow:var(--shadow);overflow:hidden}.topbar{display:grid;gap:18px;padding:20px;border-bottom:1px solid var(--panel-border);background:#050505d1;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.brand-lockup{display:flex;align-items:center;gap:10px}.brand-mark{display:grid;width:38px;height:38px;place-items:center;border-radius:14px;background:var(--accent);color:var(--text);font-weight:900}.brand-name{font-weight:800;letter-spacing:0;text-transform:uppercase}.progress-wrap{display:grid;gap:8px;color:var(--subtle);font-size:.78rem;text-transform:uppercase}.progress-track{height:7px;overflow:hidden;border-radius:999px;background:#242424}.progress-fill{height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--accent),var(--accent-strong));transition:width .24s ease}.screen{flex:1;display:flex;flex-direction:column;gap:26px;padding:28px 20px 24px}.intro-screen{justify-content:flex-end;min-height:580px}.eyebrow,.panel-label{margin:0 0 10px;color:var(--accent-strong);font-size:.78rem;font-weight:800;letter-spacing:0;text-transform:uppercase}h1,h2,p{margin-top:0}h1{max-width:680px;margin-bottom:16px;font-size:clamp(2.1rem,9vw,4.6rem);line-height:.95;letter-spacing:0}h2{margin-bottom:10px;font-size:1.35rem;line-height:1.15}.lead-copy,.secondary-copy{color:var(--muted);font-size:1.03rem;line-height:1.6}.secondary-copy{margin-bottom:0;color:var(--subtle)}.primary-button,.secondary-button{width:100%;min-height:58px;border:0;border-radius:999px;padding:15px 22px;cursor:pointer;font-weight:800;transition:transform .16s ease,background .16s ease,border-color .16s ease,opacity .16s ease}.primary-button{background:var(--accent);color:var(--text);box-shadow:0 16px 36px #c4182047}.secondary-button{border:1px solid var(--panel-border);background:#1c1c1c;color:var(--text)}.primary-button:hover,.secondary-button:hover,.option-card:hover{transform:translateY(-1px)}.primary-button:disabled,.secondary-button:disabled{cursor:not-allowed;opacity:.46;transform:none}.form-grid{display:grid;gap:14px}.field{display:grid;gap:8px;color:var(--muted);font-size:.9rem;font-weight:700}.field input,.field select{width:100%;min-height:54px;border:1px solid var(--panel-border);border-radius:18px;background:var(--panel);color:var(--text);padding:0 16px;outline:none}.field select{-webkit-appearance:none;-moz-appearance:none;appearance:none}.field input:focus,.field select:focus{border-color:var(--accent-strong);box-shadow:0 0 0 4px var(--accent-soft)}.form-error,.status-message{color:#ff8e94;font-weight:700}.question-meta{display:flex;justify-content:space-between;gap:14px;color:var(--subtle);font-size:.82rem;font-weight:800;text-transform:uppercase}.options-list{display:grid;gap:12px}.option-card{display:grid;grid-template-columns:42px 1fr;align-items:center;gap:14px;min-height:82px;border:1px solid var(--panel-border);border-radius:22px;background:var(--panel);color:var(--muted);padding:16px;text-align:left;cursor:pointer;line-height:1.38;transition:transform .16s ease,border-color .16s ease,background .16s ease}.option-letter{display:grid;width:42px;height:42px;place-items:center;border-radius:50%;background:#242424;color:var(--text);font-weight:900}.option-card.selected{border-color:var(--accent-strong);background:linear-gradient(135deg,rgba(196,24,32,.2),var(--panel-strong));color:var(--text)}.option-card.selected .option-letter{background:var(--accent)}.button-row,.button-stack{display:grid;gap:12px;margin-top:auto}.result-screen{gap:16px}.result-panel{border:1px solid var(--panel-border);border-radius:22px;background:var(--panel);padding:18px}.primary-result{border-color:#ec1c2473;background:linear-gradient(135deg,#c4182033,#121212fa)}.result-panel p{margin-bottom:0;color:var(--muted);line-height:1.55}.result-panel p+p{margin-top:12px}.leak-list{display:grid;gap:16px}.leak-list strong{display:block;margin-bottom:6px;color:var(--text)}@media (min-width: 680px){.app-shell{padding:28px}.diagnostic-frame{min-height:calc(100vh - 56px)}.topbar{grid-template-columns:1fr 220px;align-items:center;padding:24px 30px}.screen{padding:48px 42px 38px}.intro-screen{min-height:620px}.form-grid{grid-template-columns:repeat(2,1fr)}.button-row{grid-template-columns:.8fr 1.2fr}.button-stack{grid-template-columns:1fr 1fr}}