:root{--bg:#f5f8fc;--card:#fff;--primary:#1a4b5f;--accent:#6b9e9e;--muted:#5a6c7d;--border:#d0ddee;--gold:#ecdca8;--warm-bg:#fefcf5}.calculator{margin:30px 0}.calc-title{color:var(--primary);font-size:2rem;margin-bottom:10px;text-align:center}.calc-subtitle{color:var(--muted);text-align:center;margin-bottom:30px}.calc-card{background:linear-gradient(180deg,#fff 0%,#fbfdff 100%);padding:25px;border-radius:22px;box-shadow:0 10px 30px rgba(26,75,95,.08);border:1px solid #d9e3ee;position:relative;overflow:hidden}.calc-card::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at top right,rgba(107,158,158,.12),transparent 38%),radial-gradient(circle at bottom left,rgba(26,75,95,.08),transparent 35%);pointer-events:none}.calc-grid{display:flex;flex-direction:column;gap:15px;position:relative;z-index:1}.calc-row{display:flex;gap:10px}.calc-single{flex:1}.calc-double{flex:2}.input-group{flex:1}.input-group label{display:block;font-weight:700;margin-bottom:5px;color:var(--primary);font-size:0.9rem}.date-input-wrapper{position:relative}.date-input{width:100%;padding:10px;border-radius:12px;border:1.5px solid var(--gold);background:var(--warm-bg);font-size:0.95rem;cursor:pointer;transition:border-color .2s ease,box-shadow .2s ease;color:#1a3f5c}.date-input:focus{outline:none;border-color:var(--primary);background:#fff;box-shadow:0 0 0 4px rgba(26,75,95,.08)}.date-list{position:absolute;top:100%;left:0;right:0;background:#fff;border:1px solid var(--primary);border-radius:12px;max-height:200px;overflow:auto;display:none;z-index:1000;box-shadow:0 12px 28px rgba(0,0,0,0.08)}.date-list.active{display:block}.date-item{padding:10px;border-bottom:1px solid #dce5ec;cursor:pointer;font-size:0.9rem;color:#1a3f5c}.date-item:last-child{border-bottom:none}.date-item:hover{background:#f2f6fc}.calc-btn{background:linear-gradient(135deg,#FFD700,#DAA520,#B8860B);color:#fff;border:0;padding:12px 28px;border-radius:12px;cursor:pointer;display:block;margin:20px auto 0;transition:transform .2s ease,box-shadow .2s ease,filter .2s ease;width:auto;position:relative;overflow:hidden;box-shadow:0 8px 18px rgba(218,165,32,.3);font-weight:700}.calc-btn:hover{transform:translateY(-2px);box-shadow:0 12px 22px rgba(218,165,32,.5);filter:saturate(1.03);background:linear-gradient(135deg,#FFDF00,#E6BE8A,#CD853F);color:#654321}.calc-btn:active{transform:translateY(1px);box-shadow:0 4px 12px rgba(218,165,32,.3)}.calc-btn:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,0.3),transparent);transition:0.5s}.calc-btn:hover:before{left:100%}.results-box{margin-top:25px;padding:20px;background:var(--warm-bg);border-radius:16px;border:1px solid var(--gold);border-right:5px solid var(--accent);display:none;box-shadow:0 6px 16px rgba(0,0,0,.04)}.results-box.show{display:block}.result-row{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px dashed #dce5ec}.result-row:last-child{border-bottom:none}.result-label{font-weight:700;font-size:0.95rem;color:#1a3f5c}.result-value{font-weight:800;color:var(--accent);font-size:0.95rem}.meta-info{text-align:center;margin-top:15px;color:var(--muted);font-size:0.85rem}@media (max-width:767px){.calc-card{padding:16px}.calc-row{flex-wrap:nowrap;gap:8px}.input-group{flex:1;min-width:0}.date-input{padding:8px;font-size:0.9rem}.input-group label{font-size:0.85rem;margin-bottom:4px}.calc-btn{width:auto;padding:5px 5px;font-size:.8rem;margin:15px auto 0}}