:root {
  --ink: #122b35;
  --muted: #61727a;
  --line: #dbe5e8;
  --paper: #f5f8f7;
  --white: #ffffff;
  --navy: #0c3038;
  --teal: #0b7d74;
  --teal-dark: #075b56;
  --teal-soft: #dff3ee;
  --blue: #2d6a91;
  --blue-soft: #e5eff7;
  --amber: #b16f20;
  --amber-soft: #f8edda;
  --red: #b84b4b;
  --red-soft: #fbe8e7;
  --green: #3c7a55;
  --green-soft: #e6f2e9;
  --violet: #6e5aa8;
  --violet-soft: #ece8f7;
  --cyan-soft: #e3f5f6;
  --shadow: 0 18px 50px rgba(18, 43, 53, 0.08);
}

* { box-sizing: border-box; }
html { min-height: 100%; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100%;
  min-width: 320px;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}
body.is-locked { overflow: hidden; }
button, input, textarea, select { max-width: 100%; font: inherit; }
button { cursor: pointer; }
button, .button {
  -webkit-appearance: none;
  appearance: none;
}

.app-shell { display: flex; width: 100%; min-height: 100vh; min-height: 100dvh; }
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 20;
  display: flex;
  width: 250px;
  max-height: 100vh;
  max-height: 100dvh;
  flex-direction: column;
  padding: 28px 18px;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  background: var(--navy);
  color: white;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,.28) transparent;
}
.sidebar::-webkit-scrollbar { width: 6px; }
.sidebar::-webkit-scrollbar-thumb { border-radius: 999px; background: rgba(255,255,255,.24); }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar-close {
  position: absolute; top: 14px; right: 14px; display: none; width: 34px; height: 34px;
  border: 1px solid rgba(255,255,255,.18); border-radius: 9px;
  background: rgba(255,255,255,.08); color: white; font-size: 22px; line-height: 1;
}
.brand { display: flex; align-items: center; gap: 12px; padding: 0 10px 34px; }
.brand-mark {
  display: grid; width: 42px; height: 42px; place-items: center;
  border-radius: 13px; background: #ffffff;
  overflow: hidden; box-shadow: 0 8px 20px rgba(0,0,0,.16);
}
.brand-mark img { display: block; width: 100%; height: 100%; object-fit: contain; }
.brand strong, .brand span { display: block; }
.brand strong { font-size: 18px; letter-spacing: .05em; }
.brand span { margin-top: 3px; color: #8eb1b5; font-size: 9px; letter-spacing: .04em; line-height: 1.35; }
nav { display: grid; gap: 8px; }
.nav-item {
  display: flex; align-items: center; gap: 13px; width: 100%;
  border: 0; border-radius: 10px; padding: 13px 14px;
  background: transparent; color: #a9c3c6; text-align: left;
}
.nav-item span { width: 24px; color: #77a6aa; font-size: 18px; text-align: center; }
.nav-item:hover, .nav-item.active { background: rgba(255,255,255,.09); color: white; }
.nav-item.active span { color: #6bd1bd; }
.privacy-card {
  display: flex; gap: 10px; align-items: flex-start; margin-top: auto;
  border: 1px solid rgba(255,255,255,.1); border-radius: 12px;
  padding: 14px; background: rgba(255,255,255,.04);
}
.privacy-card strong, .privacy-card small { display: block; }
.privacy-card strong { font-size: 12px; }
.privacy-card small { margin-top: 4px; color: #8eb1b5; font-size: 10px; }
.status-dot { width: 8px; height: 8px; margin-top: 3px; border-radius: 50%; background: #67d9a6; box-shadow: 0 0 0 4px rgba(103,217,166,.12); }

.main { width: calc(100% - 250px); min-width: 0; margin-left: 250px; }
.topbar {
  display: flex; height: 90px; align-items: center; gap: 20px; justify-content: space-between;
  border-bottom: 1px solid var(--line); padding: 0 4.5vw; background: rgba(245,248,247,.93);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px); position: sticky; top: 0; z-index: 10;
}
.topbar h1 { margin: 3px 0 0; font-size: 21px; }
.eyebrow { margin: 0; color: var(--teal); font-size: 10px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.top-actions { display: flex; align-items: center; gap: 18px; color: var(--muted); font-size: 12px; }
.user-badge {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 11px;
  background: rgba(255,255,255,.72);
  color: var(--teal-dark);
  font-weight: 700;
}
.menu-button { display: none !important; }
.page { display: none; min-width: 0; padding: 48px 4.5vw 70px; }
.page.active { display: block; }

.login-screen {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  min-height: 100vh;
  min-height: 100dvh;
  overflow: auto;
  padding: 24px;
  background:
    radial-gradient(circle at 20% 10%, rgba(107,209,189,.24), transparent 28%),
    radial-gradient(circle at 80% 85%, rgba(45,106,145,.18), transparent 32%),
    rgba(245,248,247,.96);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}
.login-screen.hidden { display: none; }
.login-card {
  width: min(460px, 100%);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 34px;
  background: rgba(255,255,255,.92);
  box-shadow: var(--shadow);
}
.login-card h2 {
  margin: 12px 0 8px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 42px;
  line-height: 1;
}
.login-card p {
  margin: 0 0 24px;
  color: var(--muted);
  line-height: 1.7;
}
.login-card label { display: block; margin-top: 14px; }
.login-card .button { width: 100%; margin-top: 18px; }
.login-card small { display: block; margin-top: 14px; color: var(--muted); line-height: 1.6; }
.login-error { min-height: 22px; margin: 10px 0 0 !important; color: var(--red) !important; font-weight: 700; }

.hero {
  display: grid; min-height: 390px; grid-template-columns: 1.05fr .95fr; align-items: center;
  overflow: hidden; border-radius: 24px; padding: 48px 52px;
  background: linear-gradient(120deg, #e2f1ec 0%, #edf5f1 52%, #e5ece7 100%);
}
.hero h2, .section-intro h2 { margin: 18px 0; font-family: Georgia, "Songti SC", serif; font-size: clamp(36px, 4vw, 58px); line-height: 1.07; letter-spacing: -.035em; }
.hero h2 em { color: var(--teal); font-style: normal; }
.hero p { max-width: 620px; color: var(--muted); font-size: 15px; line-height: 1.9; }
.pill { display: inline-flex; border: 1px solid rgba(11,125,116,.18); border-radius: 30px; padding: 7px 12px; background: rgba(255,255,255,.6); color: var(--teal); font-size: 10px; font-weight: 700; letter-spacing: .08em; }
.hero-actions { display: flex; gap: 12px; margin-top: 28px; }
.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid transparent; border-radius: 9px; padding: 11px 17px;
  font-size: 13px; font-weight: 700; transition: .2s ease;
  text-decoration: none;
  white-space: nowrap;
}
.button:hover { transform: translateY(-1px); }
.button.primary { background: var(--teal); color: white; box-shadow: 0 9px 24px rgba(11,125,116,.2); }
.button.primary:hover { background: var(--teal-dark); }
.button.secondary { border-color: #bed2d2; background: white; color: var(--ink); }
.button.ghost { border-color: var(--line); background: transparent; color: var(--ink); }
.button.danger { border-color: #e7c3c0; background: var(--red-soft); color: var(--red); }
.full-width { width: 100%; }
.icon-button { display: grid; width: 38px; height: 38px; place-items: center; border: 0; border-radius: 8px; background: transparent; color: var(--ink); font-size: 22px; }
.icon-button:hover { background: #edf2f1; }

.hero-visual { position: relative; min-height: 300px; }
.hero-visual svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-visual path { fill: none; stroke: #6baaa2; stroke-dasharray: 7 7; stroke-width: 2; animation: flow 12s linear infinite; }
@keyframes flow { to { stroke-dashoffset: -120; } }
.tank {
  position: absolute; z-index: 2; top: 87px; display: grid; width: 112px; height: 126px; place-content: center;
  border: 5px solid rgba(255,255,255,.65); border-radius: 24px 24px 38px 38px; color: white; text-align: center;
  box-shadow: inset 0 -45px 70px rgba(0,0,0,.15), var(--shadow);
}
.tank::before { content:""; position:absolute; top:-14px; left:24px; width:54px; height:16px; border-radius:8px; background:#dce8e4; }
.tank span { font-size: 11px; opacity: .82; }
.tank b { display: block; margin-top: 5px; font-size: 12px; }
.tank-positive { right: 0; background: linear-gradient(#4a8aac, #1d597c); }
.tank-negative { left: 0; background: linear-gradient(#619471, #306a4b); }
.stack-visual { position: absolute; z-index: 3; top: 73px; left: 50%; display: flex; gap: 5px; transform: translateX(-50%); }
.stack-visual i { display: block; width: 17px; height: 150px; border-radius: 3px; background: linear-gradient(90deg, #233c41, #8ea9a3, #1c353a); box-shadow: 0 4px 7px rgba(0,0,0,.15); }
.stack-visual span { position: absolute; top: 165px; width: 100%; color: var(--muted); font-size: 11px; text-align: center; }

.section-heading, .panel-heading, .section-intro { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.section-heading { margin: 45px 0 18px; }
.section-heading h3, .panel-heading h3 { margin: 6px 0 0; font-family: Georgia, "Songti SC", serif; font-size: 24px; }
.record-actions { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; }
.section-intro { margin-bottom: 28px; }
.section-intro h2 { margin: 11px 0 9px; font-size: 40px; }
.section-intro p { margin: 0; color: var(--muted); }

.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 18px; }
.feature-card {
  position: relative; min-height: 255px; overflow: hidden; border-radius: 17px;
  padding: 26px; transition: .25s ease; cursor: pointer;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.feature-card.teal { background: var(--teal-soft); }
.feature-card.blue { background: var(--blue-soft); }
.feature-card.amber { background: var(--amber-soft); }
.feature-card.violet { background: var(--violet-soft); }
.feature-card.green { background: var(--green-soft); }
.feature-card.cyan { background: var(--cyan-soft); }
.feature-card.slate { background: #e7eef5; }
.feature-card.moss { background: #e9f3ec; }
.feature-number { position: absolute; top: 16px; right: 20px; color: rgba(18,43,53,.15); font-family: Georgia, serif; font-size: 34px; }
.feature-icon { display: grid; width: 48px; height: 48px; place-items: center; border-radius: 13px; background: rgba(255,255,255,.72); font-size: 23px; }
.feature-card h4 { margin: 24px 0 10px; font-size: 19px; }
.feature-card p { color: var(--muted); font-size: 13px; line-height: 1.75; }
.card-link { position: absolute; bottom: 24px; color: var(--teal-dark); font-size: 12px; font-weight: 700; }

.dashboard-lower { display: grid; grid-template-columns: 1.5fr 1fr; gap: 18px; margin-top: 18px; }
.panel { min-width: 0; border: 1px solid var(--line); border-radius: 16px; padding: 24px; background: var(--white); box-shadow: 0 7px 24px rgba(18,43,53,.035); }
.knowledge-panel p:last-child { margin: 18px 0 0; color: var(--muted); font-size: 12px; line-height: 1.7; }
.causal-chain { display: flex; align-items: center; gap: 10px; margin-top: 22px; }
.causal-chain span { border-radius: 7px; padding: 9px 11px; background: var(--paper); font-size: 12px; }
.causal-chain b { color: var(--teal); }
.stats-panel { display: grid; grid-template-columns: repeat(3, 1fr); align-items: center; }
.stats-panel div { text-align: center; }
.stats-panel div + div { border-left: 1px solid var(--line); }
.stats-panel strong, .stats-panel span { display: block; }
.stats-panel strong { font-family: Georgia, serif; font-size: 28px; }
.stats-panel span { margin-top: 6px; color: var(--muted); font-size: 10px; }

.analysis-layout { display: grid; grid-template-columns: minmax(500px, .9fr) minmax(480px, 1.1fr); gap: 22px; align-items: start; }
.analysis-layout > *,
.voltage-layout > *,
.dashboard-lower > *,
.sample-analysis-layout > *,
.material-analysis-layout > * { min-width: 0; }
.electrolyte-panel .analysis-layout { grid-template-columns: 1fr; }
.module-switch {
  display: inline-grid; grid-template-columns: repeat(2, minmax(150px, 1fr)); gap: 6px;
  margin: 0 0 18px; border: 1px solid var(--line); border-radius: 13px; padding: 6px;
  background: white;
}
.module-tab {
  border: 0; border-radius: 9px; padding: 11px 18px; background: transparent;
  color: var(--muted); font-size: 13px; font-weight: 700;
}
.module-tab.active { background: var(--teal); color: white; box-shadow: 0 8px 20px rgba(11,125,116,.16); }
.compact-heading { margin: 4px 0 15px; }
.sample-analysis-placeholder { display: grid; gap: 22px; padding: 28px; }
.sample-analysis-placeholder h3 { margin: 7px 0 8px; font-family: Georgia, "Songti SC", serif; font-size: 26px; }
.sample-analysis-placeholder p { max-width: 760px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }
.sample-analysis-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.sample-analysis-grid article { border: 1px solid var(--line); border-radius: 13px; padding: 18px; background: #fbfdfc; }
.sample-analysis-grid span, .sample-analysis-grid strong { display: block; }
.sample-analysis-grid span { color: var(--muted); font-size: 10px; }
.sample-analysis-grid strong { margin-top: 9px; color: var(--teal-dark); font-size: 14px; line-height: 1.5; }
.sample-analysis-layout { align-items: start; }
.material-analysis-layout { grid-template-columns: 1fr; }
.material-record-panel { margin-top: 22px; }
.sample-standard-panel { margin-bottom: 14px; }
.sample-standard-grid { display: grid; grid-template-columns: 1fr; gap: 14px; }
.sample-standard-grid article { border: 1px solid var(--line); border-radius: 13px; padding: 14px; background: #fbfdfc; }
.sample-standard-grid h4 { margin: 0 0 10px; font-size: 13px; }
.standard-limit-table { min-width: 560px; background: white; }
.impurity-limit-table { min-width: 420px; }
.merged-standard-cell { text-align: center; vertical-align: middle; font-weight: 700; }
.sample-record-table { min-width: 720px; }
.reference-strip {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; overflow: hidden;
  margin-bottom: 18px; border: 1px solid var(--line); border-radius: 14px; background: var(--line);
}
.reference-strip div { padding: 15px 18px; background: white; }
.reference-strip span, .reference-strip strong { display: block; }
.reference-strip span { color: var(--muted); font-size: 9px; }
.reference-strip strong { margin-top: 6px; color: var(--teal-dark); font-size: 14px; }
.form-panel { min-width: 0; padding: 0; overflow: hidden; }
.form-section { padding: 24px; border-bottom: 1px solid var(--line); }
.compact-section { padding-bottom: 20px; }
.form-section-title { display: flex; align-items: center; gap: 9px; margin-bottom: 18px; }
.form-section-title span { width: 7px; height: 7px; border-radius: 50%; }
.positive-title span { background: var(--blue); }
.negative-title span { background: var(--green); }
.neutral-title span { background: var(--amber); }
.form-section-title h3 { margin: 0; font-size: 15px; }
.form-section-title small { margin-left: auto; color: var(--muted); font-size: 11px; }
.form-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 13px; }
.form-grid-single { grid-template-columns: 1fr; margin-top: 14px; }
.titration-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; background: white; }
.titration-table { min-width: 900px; margin: 0; }
.titration-table th, .titration-table td { border: 1px solid var(--line); padding: 8px; vertical-align: middle; }
.titration-table th { background: #f2f7f6; color: var(--ink); font-size: 12px; text-align: center; }
.titration-table td:first-child { width: 48%; color: #43565d; font-size: 12px; font-weight: 700; }
.titration-table input { min-width: 95px; padding: 8px 9px; border-radius: 6px; text-align: center; }
.sample-performance-table { min-width: 620px; }
.sample-performance-table th, .sample-performance-table td { text-align: center; }
.sample-performance-table th { white-space: nowrap; }
.sample-performance-table td:first-child {
  width: 25%;
  color: var(--ink);
  font-size: 13px;
  font-weight: 800;
  text-align: center;
}
.sample-current-density-cell { background: #fbfdfc; }
.sample-report-button {
  padding: 8px 12px;
  min-height: auto;
  font-size: 12px;
}
.titration-table .titration-note-row {
  background: #fbfdfc; color: #43565d; font-size: 12px; font-weight: 700; text-align: center;
}
.titration-summary-row td { background: #fbfdfc; }
.titration-summary-strip {
  display: grid; grid-template-columns: repeat(4, minmax(180px, 1fr)); gap: 12px;
  align-items: end;
}
.titration-summary-strip label {
  display: grid; grid-template-columns: auto minmax(90px, 1fr); gap: 8px; align-items: center;
  font-size: 11px; white-space: nowrap;
}
.titration-summary-strip input { text-align: center; }
.negative-summary-strip { margin-top: 14px; }
.high-negative-summary { grid-template-columns: repeat(3, minmax(180px, 1fr)); }
.formula-note { margin: 14px 0 0; color: var(--muted); font-size: 10px; line-height: 1.65; }
input[readonly] { background: #f1f5f4; color: var(--muted); cursor: not-allowed; }
label { display: grid; gap: 7px; color: #43565d; font-size: 11px; font-weight: 600; }
input, textarea, select {
  width: 100%; border: 1px solid #cad8db; border-radius: 8px; padding: 10px 11px;
  outline: none; background: white; color: var(--ink); font-size: 13px;
}
input:not([type="checkbox"]), textarea, select {
  -webkit-appearance: none;
  appearance: none;
}
select {
  padding-right: 34px;
  background-image: linear-gradient(45deg, transparent 50%, var(--ink) 50%), linear-gradient(135deg, var(--ink) 50%, transparent 50%);
  background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}
input[type="date"] {
  min-height: 42px;
}
input:focus, textarea:focus, select:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(11,125,116,.09); }
.form-panel > .button { border-radius: 0; padding: 15px; }
.results-column { min-width: 0; min-height: 460px; }
.electrolyte-panel .results-column { min-height: 0; }
.result-project { margin-bottom: 10px; color: var(--muted); font-size: 11px; text-align: right; }
.result-project strong { color: var(--ink); }
.empty-state { display: grid; min-height: 430px; place-content: center; text-align: center; }
.empty-icon { margin: auto; color: #92aaa9; font-size: 45px; }
.empty-state h3 { margin: 17px 0 7px; font-size: 16px; }
.empty-state p { max-width: 310px; margin: 0; color: var(--muted); font-size: 12px; line-height: 1.7; }
.hidden { display: none !important; }
.metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 14px; }
.metric-card { border: 1px solid var(--line); border-radius: 13px; padding: 17px; background: white; }
.metric-card span, .metric-card strong, .metric-card small { display: block; }
.metric-card span { color: var(--muted); font-size: 10px; }
.metric-card strong { margin: 10px 0 5px; color: var(--teal-dark); font-family: Georgia, serif; font-size: 24px; }
.metric-card small { color: #91a0a5; font-size: 9px; }
.results-column .panel + .panel { margin-top: 14px; }
.electrolyte-records-panel { min-height: 0; }
.record-toolbar {
  display: grid; grid-template-columns: minmax(150px, 1fr) minmax(150px, 1fr) auto;
  gap: 12px; align-items: end; margin: 12px 0 14px;
}
.electrolyte-record-table-wrap { border: 1px solid var(--line); border-radius: 12px; overflow-x: auto; }
.electrolyte-record-table { min-width: 1280px; }
.electrolyte-record-table th,
.electrolyte-record-table td { text-align: center; }
.electrolyte-record-table th:nth-child(2),
.electrolyte-record-table td:nth-child(2) { text-align: left; }
.empty-table-cell { height: 120px; color: var(--muted); text-align: center !important; }
.large-result { color: var(--teal); font-family: Georgia, serif; font-size: 26px; }
.danger-text { color: var(--red) !important; }
.energy-comparison {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 22px;
}
.energy-comparison div { border-radius: 10px; padding: 14px; background: var(--paper); }
.energy-comparison span, .energy-comparison strong { display: block; }
.energy-comparison span { color: var(--muted); font-size: 9px; line-height: 1.5; }
.energy-comparison strong { margin-top: 8px; font-size: 16px; }
.recovery-panel { border-color: #e7c3c0; background: linear-gradient(145deg, #fff, #fff8f7); }
.recovery-basis { margin: 17px 0; color: var(--muted); font-size: 11px; line-height: 1.7; }
.process-list { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.process-list li { display: grid; grid-template-columns: 30px 1fr; gap: 11px; border-radius: 10px; padding: 12px; background: white; }
.process-list li > span { display: grid; width: 27px; height: 27px; place-items: center; border-radius: 50%; background: var(--red-soft); color: var(--red); font-size: 11px; font-weight: 700; }
.process-list strong { font-size: 11px; }
.process-list p { margin: 4px 0 0; color: var(--muted); font-size: 10px; line-height: 1.6; }
.warning-note { border-left: 3px solid var(--amber); padding-left: 10px; }
.bar-comparison { display: grid; gap: 17px; margin-top: 23px; }
.bar-comparison > div { display: grid; grid-template-columns: 100px 1fr 75px; align-items: center; gap: 12px; }
.bar-comparison span, .bar-comparison b { font-size: 10px; }
.bar-comparison b { text-align: right; }
.bar-track { height: 8px; overflow: hidden; border-radius: 8px; background: #edf2f2; }
.bar-track i { display: block; width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--teal), #67b99e); transition: width .5s ease; }
.findings { display: grid; gap: 10px; margin-top: 18px; }
.finding { display: grid; grid-template-columns: auto 1fr auto; gap: 11px; align-items: start; border-radius: 10px; padding: 13px; background: var(--paper); }
.finding-icon { display: grid; width: 25px; height: 25px; place-items: center; border-radius: 50%; font-size: 12px; }
.finding.good .finding-icon { background: var(--green-soft); color: var(--green); }
.finding.warn .finding-icon { background: var(--amber-soft); color: var(--amber); }
.finding.danger .finding-icon { background: var(--red-soft); color: var(--red); }
.finding h4 { margin: 1px 0 5px; font-size: 12px; }
.finding p { margin: 0; color: var(--muted); font-size: 10px; line-height: 1.6; }
.confidence { border-radius: 20px; padding: 4px 7px; background: white; color: var(--muted); font-size: 9px; white-space: nowrap; }

.upload-panel { margin-bottom: 18px; }
.upload-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 20px; }
.drop-zone {
  place-content: center; min-height: 205px; border: 1.5px dashed #9cb8b7; border-radius: 12px;
  background: #f7fbfa; text-align: center; cursor: pointer;
}
.drop-zone input { display: none; }
.drop-zone strong, .drop-zone small { display: block; }
.drop-zone small { margin-top: 7px; color: var(--muted); }
.upload-icon { color: var(--teal); font-size: 32px; }
.paste-area { display: grid; gap: 9px; }
.paste-area textarea { resize: vertical; font-family: "SFMono-Regular", Consolas, monospace; font-size: 11px; }
.threshold-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 20px; padding-top: 18px; border-top: 1px solid var(--line); }
.voltage-layout { display: grid; grid-template-columns: 1.5fr .7fr; gap: 14px; margin-bottom: 14px; }
.chart-panel { min-width: 0; }
#voltageChart { display: block; width: 100%; height: 360px; margin-top: 18px; border-radius: 8px; background: #fbfdfd; }
.chart-legend { display: flex; flex-wrap: wrap; gap: 8px; max-width: 50%; justify-content: flex-end; }
.chart-legend span { display: flex; align-items: center; gap: 5px; font-size: 9px; color: var(--muted); }
.chart-legend i { width: 10px; height: 3px; border-radius: 2px; }
.table-wrap { overflow-x: auto; margin-top: 17px; }
table { width: 100%; border-collapse: collapse; }
th, td { border-bottom: 1px solid var(--line); padding: 11px 12px; text-align: left; font-size: 11px; white-space: nowrap; }
th input[type="checkbox"], td input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--teal); }
th { background: #f3f7f6; color: var(--muted); font-weight: 700; }
.status-badge { display: inline-flex; border-radius: 20px; padding: 4px 8px; font-size: 9px; font-weight: 700; }
.status-badge.normal { background: var(--green-soft); color: var(--green); }
.status-badge.warning { background: var(--amber-soft); color: var(--amber); }
.status-badge.danger { background: var(--red-soft); color: var(--red); }

.case-entry-panel { margin-bottom: 18px; padding: 22px; }
.case-entry-panel .panel-heading { margin-bottom: 16px; }
.case-entry-grid { margin-bottom: 16px; }
.case-form-actions { display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: center; }
.case-toolbar { display: grid; grid-template-columns: 1fr 170px 150px 150px auto; gap: 13px; margin-bottom: 18px; padding: 15px; }
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.case-card { display: flex; min-height: 250px; flex-direction: column; border: 1px solid var(--line); border-radius: 15px; padding: 21px; background: white; transition: .2s ease; }
.case-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.case-card-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.case-type { border-radius: 20px; padding: 5px 9px; background: var(--teal-soft); color: var(--teal-dark); font-size: 9px; font-weight: 700; }
.case-card time { color: var(--muted); font-size: 9px; }
.case-status-line { margin-top: 10px; }
.case-card h3 { margin: 19px 0 10px; font-size: 16px; line-height: 1.5; }
.case-card p { margin: 0; color: var(--muted); font-size: 11px; line-height: 1.7; }
.case-photo-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; margin-top: 12px; }
.case-photo-strip img { width: 100%; aspect-ratio: 1; border: 1px solid var(--line); border-radius: 8px; object-fit: cover; background: var(--paper); }
.case-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: auto; padding-top: 18px; }
.case-meta span { border-radius: 5px; padding: 5px 7px; background: var(--paper); color: var(--muted); font-size: 9px; }
.case-actions { display: flex; justify-content: flex-end; gap: 12px; margin-top: 12px; }
.text-button { border: 0; background: transparent; color: var(--red); font-size: 10px; }
.text-button.edit-case { color: var(--teal); }
.text-button.export-case { color: var(--navy); }
.no-cases { grid-column: 1/-1; }

.standards-summary {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 18px;
}
.standards-toolbar {
  display: grid;
  grid-template-columns: 1fr 170px 170px;
  gap: 13px;
  margin-bottom: 18px;
  padding: 15px;
}
.patents-toolbar { grid-template-columns: 1fr 150px 150px 150px; }
.standards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.patents-grid {
  display: block;
}
.patent-company-list {
  display: grid;
  gap: 18px;
}
.patent-company-group,
.patent-field-group,
.patent-year-group {
  border: 1px solid var(--line);
  border-radius: 17px;
  background: white;
}
.patent-company-group {
  padding: 16px;
  box-shadow: var(--shadow);
}
.patent-field-list,
.patent-year-list {
  display: grid;
  gap: 13px;
  margin-top: 13px;
}
.patent-field-group {
  padding: 13px;
  background: #fbfdfd;
}
.patent-year-group {
  padding: 12px;
  background: white;
}
.patent-company-group > summary,
.patent-field-group > summary,
.patent-year-group > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  list-style: none;
}
.patent-company-group > summary::-webkit-details-marker,
.patent-field-group > summary::-webkit-details-marker,
.patent-year-group > summary::-webkit-details-marker {
  display: none;
}
.patent-company-group > summary::before,
.patent-field-group > summary::before,
.patent-year-group > summary::before {
  content: "▸";
  color: var(--teal);
  font-size: 13px;
  transition: .2s ease;
}
.patent-company-group[open] > summary::before,
.patent-field-group[open] > summary::before,
.patent-year-group[open] > summary::before {
  transform: rotate(90deg);
}
.patent-company-group > summary span,
.patent-field-group > summary span,
.patent-year-group > summary span {
  flex: 1;
  color: var(--teal-dark);
  font-weight: 800;
}
.patent-company-group > summary span {
  font-size: 22px;
}
.patent-field-group > summary span {
  font-size: 16px;
}
.patent-year-group > summary span {
  font-size: 14px;
}
.patent-company-group > summary small,
.patent-field-group > summary small,
.patent-year-group > summary small {
  border-radius: 20px;
  padding: 5px 9px;
  background: var(--paper);
  color: var(--muted);
  font-size: 10px;
  white-space: nowrap;
}
.patent-year-grid {
  margin-top: 13px;
}
.patent-owner {
  margin-top: 10px;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.6;
}
.patent-owner div + div {
  margin-top: 4px;
}
.patent-abstract {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.ipc-line {
  margin-top: 10px;
  color: #809096;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 9px;
  line-height: 1.55;
}
.standard-card {
  display: flex;
  min-height: 285px;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 15px;
  padding: 21px;
  background: white;
  transition: .2s ease;
}
.standard-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.standard-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.standard-card h3 {
  margin: 18px 0 6px;
  color: var(--teal-dark);
  font-family: Georgia, serif;
  font-size: 23px;
}
.standard-card h4 {
  margin: 0;
  min-height: 45px;
  font-size: 15px;
  line-height: 1.5;
}
.standard-card p {
  margin: 13px 0 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.7;
}
.standard-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 13px;
}
.standard-meta span {
  border-radius: 5px;
  padding: 5px 7px;
  background: var(--paper);
  color: var(--muted);
  font-size: 9px;
}
.standard-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: auto;
  padding-top: 18px;
}
.standard-actions .button { padding: 9px 13px; font-size: 11px; text-decoration: none; }
.standard-waiting {
  border-radius: 20px;
  padding: 7px 10px;
  background: #f1f5f4;
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
}
.status-badge.muted { background: #eef3f3; color: var(--muted); }

.about-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.about-grid h3 { margin: 8px 0 16px; font-size: 19px; }
.clean-list { display: grid; gap: 10px; padding: 0; list-style: none; }
.clean-list li { position: relative; padding-left: 18px; color: var(--muted); font-size: 12px; line-height: 1.6; }
.clean-list li::before { content: "✓"; position: absolute; left: 0; color: var(--teal); font-weight: 700; }
.data-actions { grid-column: 1/-1; }
.data-actions > div { display: flex; gap: 10px; }
.file-button input { display: none; }

.account-layout {
  display: grid;
  grid-template-columns: minmax(360px, .8fr) minmax(520px, 1.2fr);
  gap: 18px;
  align-items: start;
}
.account-layout > * { min-width: 0; }
.account-form .panel-heading,
.account-list-panel .panel-heading { margin-bottom: 18px; }
.account-notification-panel {
  grid-column: 1 / -1;
}
.account-notification-panel .panel-heading {
  margin-bottom: 18px;
}
.account-notification-panel .panel-heading p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}
.account-module-block {
  margin-top: 18px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}
.account-module-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(150px, 1fr));
  gap: 10px;
}
.inline-check {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #43565d;
  font-size: 12px;
  font-weight: 700;
}
.inline-check input {
  width: 16px;
  height: 16px;
  accent-color: var(--teal);
}
.module-check {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  background: #fbfdfc;
}
.account-extra-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 18px 0;
}
.account-table { min-width: 760px; }
.account-permission-cell {
  max-width: 360px;
  white-space: normal;
  line-height: 1.7;
}
.account-built-in {
  display: inline-flex;
  margin-left: 6px;
  border-radius: 999px;
  padding: 2px 6px;
  background: var(--paper);
  color: var(--muted);
  font-size: 9px;
  font-weight: 700;
}
.text-button.delete-account { margin-left: 10px; }
.hint-text {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

dialog { width: min(720px, calc(100vw - 30px)); max-width: calc(100vw - 30px); border: 0; border-radius: 18px; padding: 0; color: var(--ink); box-shadow: 0 30px 90px rgba(0,0,0,.25); }
dialog::backdrop { background: rgba(8,31,36,.58); -webkit-backdrop-filter: blur(5px); backdrop-filter: blur(5px); }
dialog form { padding: 27px; }
.dialog-heading { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 22px; }
.dialog-heading h2 { margin: 5px 0 0; }
.dialog-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-bottom: 18px; }
.full-field { grid-column: 1/-1; }
textarea { resize: vertical; }
.toast { position: fixed; z-index: 100; right: 22px; bottom: 22px; transform: translateY(20px); border-radius: 9px; padding: 12px 16px; background: var(--navy); color: white; font-size: 12px; opacity: 0; pointer-events: none; transition: .25s ease; }
.toast.show { transform: translateY(0); opacity: 1; }

@media (max-width: 1150px) {
  .hero { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .analysis-layout, .voltage-layout { grid-template-columns: 1fr; }
  .account-layout { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 820px) {
  .sidebar { transform: translateX(-100%); transition: .25s ease; }
  .sidebar.open { transform: translateX(0); }
  .sidebar-close { display: grid; place-items: center; }
  .main { width: 100%; margin-left: 0; }
  .menu-button { display: grid !important; }
  .topbar { padding: 0 20px; }
  .top-actions span { display: none; }
  .page { padding: 30px 20px 50px; }
  .hero { padding: 34px 28px; }
  .feature-grid, .dashboard-lower, .about-grid, .standards-summary, .standards-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: 230px; }
  .metric-grid { grid-template-columns: repeat(2, 1fr); }
  .reference-strip { grid-template-columns: repeat(2, 1fr); }
  .data-actions { grid-column: auto; }
  .record-toolbar { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .top-actions .button { display: none; }
  .hero h2, .section-intro h2 { font-size: 34px; }
  .hero-actions, .section-intro { align-items: stretch; flex-direction: column; }
  .form-grid, .threshold-row, .upload-grid, .case-toolbar, .case-grid, .dialog-grid, .energy-comparison, .reference-strip, .standards-toolbar, .patents-toolbar { grid-template-columns: 1fr; }
  .full-field { grid-column: auto; }
  .causal-chain { align-items: stretch; flex-direction: column; }
  .causal-chain b { transform: rotate(90deg); text-align: center; }
  .stats-panel { grid-template-columns: 1fr; gap: 20px; }
  .stats-panel div + div { border-top: 1px solid var(--line); border-left: 0; padding-top: 20px; }
  .bar-comparison > div { grid-template-columns: 1fr; }
  .bar-comparison b { text-align: left; }
}