:root{color-scheme:light;--bg: #f7f8fa;--surface: #ffffff;--surface-2: #f2f3f5;--text: #323233;--subtle: #646566;--border: #ebedf0;--primary: #1989fa;--primary-weak: #e8f3ff;--success: #07c160;--shadow: 0 8px 24px rgba(50, 50, 51, .08);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.5;font-weight:400;color:var(--text);background:var(--bg)}*{box-sizing:border-box}html,body,#root{min-height:100%;margin:0}body{background:linear-gradient(180deg,#f7f8fa,#eef2f6)}button,input{font:inherit}.app-shell{min-height:100vh;padding:20px}.app-page{width:min(1120px,100%);margin:0 auto}.hero{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(280px,.9fr);gap:16px;align-items:stretch;margin-bottom:16px}.hero-copy,.hero-panel,.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow)}.hero-copy{padding:24px}.hero-badge,.tag,.status{display:inline-flex;align-items:center;border-radius:999px;font-size:12px;line-height:1}.hero-badge{padding:7px 10px;background:var(--primary-weak);color:var(--primary);margin-bottom:12px}.hero h1,.section-head h2{margin:0;letter-spacing:0}.hero h1{font-size:clamp(28px,3vw,42px);line-height:1.1}.hero p{margin:12px 0 0;max-width:56ch;color:var(--subtle)}.hero-panel{display:grid;gap:12px;padding:20px;background:linear-gradient(180deg,#fff,#fafbfc)}.timer-ring{display:grid;place-items:center;aspect-ratio:1;width:min(100%,240px);margin:0 auto;border-radius:50%;border:10px solid var(--primary-weak);background:conic-gradient(var(--primary) 0 42%,#eef3ff 42% 100%)}.timer-ring>div{display:grid;place-items:center;width:calc(100% - 22px);height:calc(100% - 22px);border-radius:50%;background:var(--surface);text-align:center}.timer-ring strong{font-size:clamp(28px,4vw,38px);line-height:1}.timer-ring span{margin-top:6px;font-size:13px;color:var(--subtle)}.hero-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.hero-stats div,.settings-list div,.result-grid div{padding:12px;background:var(--surface-2);border-radius:10px}.hero-stats span,.settings-list span,.result-grid dt,.input-grid span{display:block;font-size:12px;color:var(--subtle)}.hero-stats strong,.settings-list strong,.result-grid dd{display:block;margin-top:4px;font-size:20px;color:var(--text)}.settings-list label{display:grid;gap:8px}.settings-list select{width:100%;min-height:44px;padding:0 12px;border:1px solid var(--border);border-radius:10px;background:#fff;color:var(--text)}.progress-bar{height:8px;overflow:hidden;margin-bottom:20px;border-radius:999px;background:#eef2f7}.progress-bar span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--primary),#5babfc)}.board{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(280px,.7fr);gap:16px}.card{padding:20px}.section-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:16px}.section-head.compact{margin-bottom:12px}.section-head h2{font-size:18px}.tag{padding:7px 10px;background:#f0f9eb;color:var(--success);white-space:nowrap}.fraction-row{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:16px;padding:22px 0 8px}.fraction{display:grid;justify-items:center;min-width:140px}.fraction i{width:100%;height:1px;margin:8px 0;background:var(--text)}.fraction-value,.operator{font-size:clamp(22px,4vw,36px);font-weight:600}.operator{color:var(--primary)}.input-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:16px}.input-grid label{display:grid;gap:8px}.input-grid input{width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:10px;background:#fff;color:var(--text)}.input-grid input:focus{outline:2px solid rgba(25,137,250,.18);border-color:var(--primary)}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:16px}.actions button{min-height:44px;padding:0 18px;border:0;border-radius:10px;cursor:pointer}.primary{background:var(--primary);color:#fff}.secondary{background:#f2f3f5;color:var(--text)}.side-stack{display:grid;gap:16px}.mini-card{padding:18px}.status.ok{padding:7px 10px;background:#ecfdf3;color:var(--success)}.status.bad{padding:7px 10px;background:#fff1f0;color:#f56c6c}.result-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:0}.result-grid dd{margin-left:0}.settings-list{display:grid;gap:10px}@media(max-width:900px){.hero,.board{grid-template-columns:1fr}.hero-panel{grid-template-columns:minmax(0,1fr)}}@media(max-width:640px){.app-shell{padding:12px}.hero-copy,.hero-panel,.card{padding:16px}.input-grid,.hero-stats,.result-grid{grid-template-columns:1fr}.fraction-row{gap:10px}.fraction{min-width:120px}.actions button{width:100%}}