:root{
  --navy:#0b1f2a;
  --navy2:#123443;
  --gold:#d2ad5b;
  --gold2:#f0d48e;
  --bg:#f4f6f7;
  --card:#ffffff;
  --text:#17242c;
  --muted:#6d7b84;
  --line:#dce3e7;
  --ok:#1c7a52;
  --warn:#a86419;
  --danger:#9b3535;
  --shadow:0 10px 30px rgba(11,31,42,.08);
  --radius:18px;
}
*{box-sizing:border-box}
html{background:var(--bg)}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text);background:var(--bg);padding-bottom:96px;font-size:16px;line-height:1.45}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
.app-header{position:relative;overflow:hidden;background:linear-gradient(135deg,var(--navy),#123b4d);color:#fff;padding:18px 18px 24px;min-height:122px;display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
.header-art{position:absolute;inset:0;background:radial-gradient(circle at 78% 28%,rgba(210,173,91,.18),transparent 25%),linear-gradient(170deg,transparent 0 60%,rgba(255,255,255,.05) 60% 62%,transparent 62% 100%)}
.header-art:after{content:"";position:absolute;right:-28px;bottom:-38px;width:190px;height:100px;border:1px solid rgba(255,255,255,.12);border-radius:50% 0 0 0;transform:skewX(-18deg)}
.brand-lockup{position:relative;z-index:1;display:flex;align-items:center;gap:12px}
.brand-mark{width:48px;height:48px;display:block;background:transparent;border-radius:0;padding:0;box-shadow:none;object-fit:contain;flex:0 0 auto}
.brand{font-size:13px;font-weight:900;letter-spacing:.16em;color:var(--gold2)}
.app-name{font-size:21px;font-weight:800;margin-top:2px}
.status-pill{position:relative;z-index:1;border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.08);padding:8px 10px;border-radius:999px;font-size:12px;white-space:nowrap}
.status-pill.online{color:#dfffea}
.app-shell{width:min(900px,100%);margin:-18px auto 0;padding:0 14px 28px;position:relative;z-index:2}
.page-title{font-size:26px;line-height:1.15;margin:0 0 6px}
.page-subtitle{margin:0 0 16px;color:var(--muted);font-size:15px}
.page-head{background:#fff;padding:18px 18px 16px;border-radius:20px;box-shadow:var(--shadow);margin-bottom:14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin:12px 0;box-shadow:var(--shadow)}
.card.flat{box-shadow:none}
.card.dark{background:linear-gradient(145deg,var(--navy),var(--navy2));color:#fff;border-color:transparent}
.card.soft{background:#f8fafb;box-shadow:none}
.card-title{font-weight:900;font-size:18px;margin-bottom:10px}
.section-title{font-size:14px;text-transform:uppercase;letter-spacing:.12em;font-weight:900;color:var(--muted);margin:22px 4px 8px}
.muted{color:var(--muted)}
.small{font-size:13px}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:12px}
.field label{font-size:14px;font-weight:800;color:#344650}
.field-note{font-size:13px;line-height:1.45;color:var(--muted)}
input,select,textarea{width:100%;font-size:16px;border:1px solid #cbd6dc;border-radius:12px;background:#fff;color:var(--text);padding:12px 13px;outline:none;min-height:48px}
input:focus,select:focus,textarea:focus{border-color:#6b8fa0;box-shadow:0 0 0 3px rgba(107,143,160,.12)}
input[readonly]{background:#eef2f4;color:#53636d}
textarea{min-height:140px;resize:vertical}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 12px}
.btn{width:100%;border:0;border-radius:13px;padding:14px 14px;min-height:48px;font-size:15px;font-weight:900;background:var(--navy);color:#fff;margin:6px 0}
.btn.gold{background:var(--gold);color:#17242c}
.btn.secondary{background:#dce7eb;color:var(--navy)}
.btn.ghost{background:#fff;color:var(--navy);border:1px solid #cbd6dc}
.btn.danger{background:#fff0f0;color:var(--danger);border:1px solid #efcaca}
.btn.compact{width:auto;padding:10px 12px;margin:0;font-size:13px;min-height:44px}
.btn:disabled{opacity:.45;cursor:not-allowed}
.segmented{display:grid;grid-template-columns:repeat(2,1fr);gap:6px;background:#edf1f3;padding:5px;border-radius:14px}
.segmented button{border:0;background:transparent;border-radius:10px;padding:10px 8px;font-weight:900;color:#52646e}
.segmented button.selected{background:#fff;color:var(--navy);box-shadow:0 3px 10px rgba(0,0,0,.08)}
.info-strip{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:10px 0;border-bottom:1px solid rgba(128,145,153,.18)}
.info-strip:last-child{border-bottom:0}
.info-strip strong{text-align:right}
.ok{color:var(--ok)}
.warn{color:var(--warn)}
.danger-text{color:var(--danger)}
.callout{background:#fff8e8;border:1px solid #ead9a8;border-radius:14px;padding:13px 14px;font-size:13px;line-height:1.5;color:#66501c;margin:12px 0}
.reminder{background:#edf7fb;border:1px solid #cfe5ee;border-radius:13px;padding:12px 13px;font-size:13px;color:#315362;margin:8px 0 12px}
.hero-value{font-size:34px;font-weight:950;letter-spacing:-.02em}
.hero-label{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:#cbd7dc;margin-top:4px}
.metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:12px 0}
.metric{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px;box-shadow:var(--shadow)}
.metric.full{grid-column:1/-1}
.big-number{font-size:23px;font-weight:950}
.metric-label{font-size:13px;color:var(--muted);line-height:1.3;margin-top:5px}
.bottom-nav{position:fixed;left:0;right:0;bottom:0;z-index:20;background:rgba(255,255,255,.97);backdrop-filter:blur(14px);border-top:1px solid #d8e0e4;display:grid;grid-template-columns:repeat(5,1fr);padding:8px max(8px,env(safe-area-inset-right)) calc(8px + env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left))}
.nav-btn{border:0;background:transparent;color:#71818a;padding:11px 2px;min-height:48px;font-size:12px;font-weight:900;letter-spacing:.05em;border-radius:10px}
.nav-btn.active{background:#edf2f4;color:var(--navy)}
.hydro-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px}
.hydro-table{width:100%;border-collapse:collapse;min-width:730px;background:#fff}
.hydro-table th{background:#eef3f5;text-align:left;font-size:14px;padding:9px 7px;white-space:nowrap}
.hydro-table td{border-top:1px solid #e5ebee;padding:5px}
.hydro-table input{min-height:44px;padding:9px 10px;border-radius:9px;font-size:15px}
.hydro-table .row-delete{width:44px;min-height:44px;font-size:15px;border-radius:9px;border:0;background:#fff0f0;color:var(--danger);font-weight:900}
.add-row{margin-top:8px;display:inline-flex;min-height:44px;font-size:14px;align-items:center;gap:6px;border:1px solid #cbd6dc;background:#fff;border-radius:10px;padding:8px 11px;font-weight:900;color:var(--navy)}
.mark-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.mark-box{border:1px solid var(--line);border-radius:14px;padding:12px;background:#fafcfc}
.mark-box h4{margin:0 0 10px;font-size:15px}
.draft-entry{display:grid;grid-template-columns:64px 1fr 1fr;gap:8px;align-items:start;margin-bottom:12px}
.draft-entry .station{font-size:14px;font-weight:950;padding-top:14px}
.draft-entry input{min-width:0;text-align:center;font-weight:800}
.draft-ref{grid-column:2/-1;background:#edf2f4;border-radius:10px;padding:9px 10px;font-size:13px;color:#4c616d;display:flex;align-items:center;justify-content:space-between;gap:8px}
.prev{display:block;text-align:center;font-size:13px;color:var(--muted);margin-top:4px}
.calc-preview{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin-top:10px}
.preview-box{border:1px solid var(--line);background:#f8fafb;border-radius:12px;padding:10px}
.preview-box strong{display:block;font-size:18px;margin-top:3px}
.weight-table{width:100%;border-collapse:collapse}
.weight-table th,.weight-table td{padding:9px 6px;border-bottom:1px solid var(--line);font-size:13px;text-align:right}
.weight-table th:first-child,.weight-table td:first-child{text-align:left}
.weight-table input{min-height:44px;padding:8px 9px;text-align:right;font-size:15px}
.weight-change.pos{color:var(--ok);font-weight:900}
.weight-change.neg{color:var(--danger);font-weight:900}
.report-list{display:flex;flex-direction:column;gap:8px}
.report-card{border:1px solid var(--line);border-radius:14px;background:#fff;overflow:hidden;box-shadow:0 4px 18px rgba(11,31,42,.05)}
.report-summary{width:100%;border:0;background:#fff;padding:14px 14px;min-height:48px;font-size:15px;display:flex;justify-content:space-between;align-items:center;text-align:left;font-weight:900;color:var(--navy)}
.report-body{padding:0 14px 14px;border-top:1px solid #edf1f3}
.report-meta{display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.tag{display:inline-flex;align-items:center;border-radius:999px;padding:5px 8px;font-size:11px;letter-spacing:.08em;font-weight:950;background:#edf2f4;color:#50616b}
.tag.edited{background:#fff2d7;color:#8b5b00}
.tag.final{background:#e8f5ee;color:#176641}
.details-toggle{border:0;background:#edf2f4;color:var(--navy);padding:11px 12px;min-height:44px;font-size:14px;border-radius:10px;font-weight:900;width:100%;text-align:left;margin-top:8px}
.nested-panel{display:none;padding:8px 0}
.nested-panel.open{display:block}
.lock-row{display:flex;gap:8px;margin-top:10px}
.lock-row .btn{margin:0}
.hidden{display:none!important}
.modal-backdrop{position:fixed;inset:0;background:rgba(5,17,23,.65);display:grid;place-items:center;z-index:50;padding:18px}
.modal{width:min(430px,100%);background:#fff;border-radius:20px;padding:18px;box-shadow:0 24px 70px rgba(0,0,0,.32)}
.modal h3{margin:0 0 8px}
.modal p{font-size:14px;color:var(--muted);line-height:1.5}
.choice{width:100%;border:1px solid #cbd6dc;background:#fff;border-radius:12px;padding:13px;min-height:48px;font-size:15px;text-align:left;font-weight:900;color:var(--navy);margin-top:8px}
.toast{position:fixed;left:50%;bottom:100px;transform:translate(-50%,18px);background:#10242e;color:#fff;padding:12px 15px;border-radius:12px;opacity:0;pointer-events:none;transition:.2s;z-index:80;max-width:90%;font-size:13px;box-shadow:0 10px 30px rgba(0,0,0,.2)}
.toast.show{opacity:1;transform:translate(-50%,0)}

.about-banner-wrap{margin:0 0 12px;border-radius:18px;overflow:hidden;background:#061a2d;box-shadow:var(--shadow);border:1px solid rgba(195,142,43,.28)}
.about-banner{display:block;width:100%;height:auto;aspect-ratio:1983/793;object-fit:contain;background:#061a2d}
.about-intro{margin-top:0}
.about-intro p{margin:0;font-size:16px;line-height:1.65;color:var(--ink)}
.about-hero p{margin:14px 0 0;color:#e3ebee;font-size:15px;line-height:1.6}
.about-brand-row{display:flex;align-items:center;gap:14px}
.about-mark{width:58px;height:58px;background:#fff;border-radius:50%;padding:5px}
.about-tagline{font-size:23px;font-weight:950;color:#fff;margin-top:2px;letter-spacing:.03em}
.about-section{background:#fff;border:1px solid var(--line);border-radius:16px;margin:10px 0;box-shadow:var(--shadow);overflow:hidden}
.about-section summary{list-style:none;cursor:pointer;padding:16px 18px;min-height:52px;font-size:17px;font-weight:950;color:var(--navy);display:flex;align-items:center;justify-content:space-between;gap:12px}
.about-section summary::-webkit-details-marker{display:none}
.about-section summary:after{content:'+';font-size:23px;line-height:1;color:var(--gold)}
.about-section[open] summary:after{content:'-'}
.about-section[open] summary{border-bottom:1px solid var(--line)}
.about-body{padding:15px 18px 18px;font-size:15px;line-height:1.6}
.about-body p{margin:0 0 13px}
.about-item{padding:12px 0;border-bottom:1px solid var(--line)}
.about-item:last-child{border-bottom:0}
.about-item strong{display:block;font-size:16px;color:var(--navy);margin-bottom:3px}
.about-item span{display:block;color:var(--muted)}
.about-subhead{margin-top:18px;padding:9px 10px;border-radius:10px;background:#edf2f4;color:var(--navy);font-size:13px;font-weight:950;text-transform:uppercase;letter-spacing:.08em}
.about-principle{background:#edf7fb;border:1px solid #cfe5ee;border-radius:13px;padding:13px 14px;font-weight:800;color:#315362}
.contact-row{display:flex;justify-content:space-between;gap:15px;padding:11px 0;border-bottom:1px solid var(--line);align-items:center}
.contact-row strong{text-align:right;color:var(--navy)}
.about-email{text-decoration:none;display:flex;align-items:center;justify-content:center;margin-top:15px}
.about-version{text-align:center;color:var(--muted);font-size:13px;padding:15px 0 4px}

@media(max-width:620px){
  .app-header{padding:15px 14px 22px;min-height:112px}
  .brand-mark{width:43px;height:43px}
  .app-name{font-size:19px}
  .status-pill{font-size:11px;padding:7px 8px}
  .app-shell{padding-left:10px;padding-right:10px}
  .form-grid,.mark-grid{grid-template-columns:1fr}
  .page-title{font-size:24px}
  .metric-grid{grid-template-columns:1fr 1fr}
  .draft-entry{grid-template-columns:58px 1fr 1fr;gap:6px}
  .nav-btn{font-size:11px;letter-spacing:.02em}
  .about-section summary{font-size:16px;padding:15px}
  .about-body{padding:14px 15px 17px;font-size:15px}
}