:root{font-family:Arial,Helvetica,sans-serif;color:#222;background:#fff;font-synthesis:none;--muted:#858580;--line:#e9e9e3;--yellow:#faf6e8}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input,select,summary{outline-offset:5px}button{cursor:pointer}header{padding:38px 4.5%;display:flex;align-items:flex-start;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{text-decoration:none;color:inherit}.brand-subtitle{display:block;font-size:12px;color:var(--muted);letter-spacing:0;margin-top:9px}.save{font-size:12px;text-align:right}.save label{display:flex;align-items:center;gap:8px;cursor:pointer}.save input{accent-color:#262626;width:15px;height:15px}.save span{display:block;color:var(--muted);font-size:11px;margin-top:8px}.shell{display:grid;grid-template-columns:255px 1fr;min-height:75vh;padding:52px 4.5% 65px;gap:65px}nav{padding-top:6px}.eyebrow{font-size:10px;color:var(--muted);letter-spacing:1.8px}#tabs{margin-top:25px;display:grid;gap:4px}.tab{display:flex;gap:18px;border:0;background:transparent;text-align:left;padding:15px 12px;color:#797975;font-size:13px;align-items:center}.tab .num{font-size:10px;color:#aaa;min-width:16px}.tab[aria-selected=true]{color:#222;background:#f4f4f0}.tab[aria-selected=true] .num{color:#222}.tab:hover{background:#f7f7f4}.nav-note{font-size:11px;line-height:1.8;color:#999;margin:48px 12px 0}main{max-width:1100px;width:100%;min-width:0}.intro{display:flex;align-items:center;justify-content:space-between;gap:20px}h1{font-size:34px;font-weight:400;letter-spacing:-1.2px;margin:16px 0 12px}.intro p{color:var(--muted);font-size:13px;line-height:1.7;margin:0}.primary{background:#252525;border:1px solid #252525;color:#fff;padding:13px 17px;white-space:nowrap;font-size:12px}.primary:hover{background:#454545}.workspace-meta{display:flex;justify-content:space-between;gap:10px;font-size:10px;color:var(--muted);padding:40px 0 15px}.workspace-meta i{display:inline-block;width:5px;height:5px;background:#7c8c76;border-radius:50%;margin-right:5px}.card{border:1px solid var(--line);margin-bottom:20px}.card-head{display:flex;align-items:center;justify-content:space-between;padding:19px 24px;border-bottom:1px solid var(--line);gap:12px}.name{border:0;background:transparent;padding:4px 0;width:60%;font-size:13px;color:#222}.actions{display:flex;gap:16px}.text-button{border:0;background:transparent;color:#81817b;padding:4px 0;font-size:11px}.text-button:hover{color:#222}.card-body{display:grid;grid-template-columns:1fr 1fr}.inputs{padding:28px 24px;display:grid;gap:20px;align-content:start}.field label{font-size:11px;display:block;margin-bottom:9px;color:#666}.input-wrap{display:flex;align-items:center;background:var(--yellow);border:1px solid #eee9d9}.input-wrap input,.input-wrap select{width:100%;min-width:0;border:0;background:transparent;padding:13px 14px;font-size:17px;color:#282820;outline-offset:0}.input-wrap span{font-size:11px;color:#9b988b;padding-right:14px;white-space:nowrap}.auto-field{display:flex;justify-content:space-between;gap:10px}.auto-field button{font-size:10px;margin-bottom:8px}.result{border-left:1px solid var(--line);background:#fafaf8;padding:28px 28px}.result-label{color:#77776f;font-size:11px}.big-value{font-size:42px;letter-spacing:-1.5px;font-weight:400;margin:13px 0 20px;word-break:break-word}.big-value small{font-size:15px;color:#96968b;letter-spacing:0;margin-left:8px}.badge{display:inline-flex;font-size:10px;padding:7px 10px;background:#eaf0e7;color:#53624b;margin-bottom:22px}.badge.warn{background:#f5e8df;color:#946045}.result-row{display:flex;align-items:baseline;justify-content:space-between;gap:15px;font-size:11px;padding:12px 0;border-top:1px solid #e7e7df}.result-row span:first-child{color:#85857b}.result-row strong{font-weight:400;text-align:right;white-space:nowrap;font-size:12px}.error{font-size:12px;line-height:1.8;color:#946045;padding:16px 0}.empty{padding:55px;text-align:center;background:#fafaf8;border:1px dashed #ddd;color:#777;font-size:13px}.method{border-top:1px solid var(--line);margin-top:34px;font-size:12px;color:#777}.method summary{list-style:none;display:flex;justify-content:space-between;padding:22px 0;cursor:pointer;color:#555}.method p{line-height:1.9;max-width:750px;margin:0 0 14px;font-size:11px}.method[open] summary span{transform:rotate(45deg)}.local-note{font-size:10px;color:#a1a198;margin-top:26px;line-height:1.8}footer{display:flex;justify-content:space-between;padding:22px 4.5%;border-top:1px solid var(--line);font-size:10px;color:#999}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:#292929;color:white;padding:12px 20px;font-size:12px;display:none;z-index:5}@media(min-width:1500px){.shell{gap:100px}}@media(max-width:1050px){.shell{grid-template-columns:200px 1fr;gap:30px}.intro{align-items:flex-start;flex-direction:column}.card-head{padding:16px}.inputs,.result{padding:22px 18px}h1{font-size:29px}}@media(max-width:750px){header{padding:25px 6%;gap:15px}.save{font-size:10px}.shell{display:block;padding:28px 6% 45px}nav{padding:0;margin-bottom:35px}#tabs{display:flex;overflow-x:auto;margin-top:16px;gap:6px;padding-bottom:8px}.tab{flex-shrink:0;padding:12px;gap:8px;font-size:11px}.nav-note{display:none}.intro{gap:22px}h1{font-size:30px}.workspace-meta{padding-top:28px}.card-body{grid-template-columns:1fr}.result{border-left:0;border-top:1px solid var(--line)}.big-value{font-size:38px}.name{width:55%}.actions{gap:12px}footer{gap:20px;line-height:1.6;padding:20px 6%}.empty{padding:35px}}

.wordmark{display:block;font-family:Arial,Helvetica,sans-serif;font-size:26px;font-weight:700;letter-spacing:0.17em;text-transform:uppercase;color:#191919;white-space:nowrap}
@media(max-width:700px){.wordmark{font-size:23px}header{flex-wrap:wrap}}

.add-calculation{margin-top:6px}

.reservoir-result{display:flex;flex-direction:column}.reservoir-length{margin-top:auto;padding-top:20px}.reservoir-length .result-label{margin-bottom:9px}.aligned-result{display:flex;align-items:center;justify-content:space-between;padding:13px 14px;border:1px solid transparent;font-size:17px}.aligned-result strong{font-weight:700}.aligned-result span{font-size:11px;color:#9b988b}@media(max-width:750px){.reservoir-length{margin-top:20px;padding-top:0}}

.aligned-result{justify-content:flex-start;gap:8px}.reservoir-area .result-label{margin-bottom:9px}.reservoir-result{position:relative}.reservoir-area{position:absolute;top:206px;left:28px;right:28px}.reservoir-area .aligned-result{font-size:12px}.reservoir-area .aligned-result strong{font-weight:400}@media(max-width:1050px){.reservoir-area{top:200px;left:18px;right:18px}}@media(max-width:750px){.reservoir-area{position:static}}