:root {
  --gw-bg: #f4f7f9;
  --gw-surface: #ffffff;
  --gw-text: #183247;
  --gw-muted: #5d6d79;
  --gw-blue: #1479b8;
  --gw-blue-dark: #0d567f;
  --gw-green: #267961;
  --gw-line: #d9e2e8;
  --gw-soft-blue: #eaf4fa;
  --gw-soft-green: #eaf5f1;
  --gw-radius: 12px;
  --gw-shadow: 0 8px 22px rgba(24, 50, 71, 0.08);
}

* { box-sizing: border-box; }
html { min-height: 100%; }
body {
  min-height: 100vh;
  height: auto !important;
  margin: 0;
  color: var(--gw-text);
  background: var(--gw-bg);
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
a { color: var(--gw-blue-dark); }
a:hover { color: var(--gw-blue); }

.skip-link { position: fixed; left: 12px; top: -80px; z-index: 20000; padding: 9px 12px; color: #fff; background: var(--gw-blue-dark); border-radius: 0 0 8px 8px; }
.skip-link:focus { top: 0; }
#header-container { position: sticky; top: 0; z-index: 9999; }

.site-header {
  min-height: 76px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 18px;
  padding: 10px 18px;
  background: rgba(255, 255, 255, 0.98);
  border-bottom: 1px solid var(--gw-line);
  box-shadow: 0 3px 14px rgba(24, 50, 71, 0.06);
}
.site-logo { display: block; width: auto; max-width: 170px; height: 52px; object-fit: contain; }
.site-title { min-width: 0; color: var(--gw-text); text-align: center; text-decoration: none; }
.site-title strong { display: block; font-size: clamp(1.25rem, 2vw, 1.7rem); line-height: 1.1; }
.site-title .geo { color: var(--gw-green); }
.site-title .water { color: var(--gw-blue); }
.site-title small { display: block; margin-top: 3px; color: var(--gw-muted); font-size: clamp(0.75rem, 1.4vw, 0.95rem); font-weight: 500; }
.menu-btn { display: none; width: 42px; height: 42px; align-items: center; justify-content: center; border: 1px solid var(--gw-line); border-radius: 9px; color: var(--gw-text); background: #fff; font-size: 1.25rem; cursor: pointer; }

.page { min-height: calc(100vh - 76px); display: flex; align-items: stretch; gap: 0 !important; flex: 1 0 auto; }
#sidebar-container { width: 244px !important; flex: 0 0 244px; background: #eef3f6; border-right: 1px solid var(--gw-line); }
.page > main, .page > .main-content, main { min-width: 0; }
.page > main { flex: 1 1 auto; }
.sidebar { position: sticky; top: 76px; min-height: calc(100vh - 76px); padding: 22px 16px; overflow-y: auto; }
.sidebar-title { margin: 0 6px 18px; font-size: 1.2rem; }
.nav-group { margin: 0 0 18px; }
.nav-label { margin: 0 8px 6px; color: #72818c; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }
.sidebar a { display: block; margin: 2px 0; padding: 8px 10px; color: #315064; border-radius: 8px; font-size: 0.94rem; font-weight: 600; line-height: 1.2; text-decoration: none; }
.sidebar a:hover, .sidebar a:focus-visible { color: var(--gw-blue-dark); background: #fff; }
.sidebar a[aria-current="page"] { color: #fff; background: var(--gw-blue-dark); }
.support-note { display: grid; grid-template-columns: 30px 1fr; align-items: center; gap: 9px; margin: 22px 4px 0; padding-top: 16px; color: var(--gw-muted); border-top: 1px solid var(--gw-line); font-size: 0.75rem; }
.support-note img { width: 30px; height: 30px; object-fit: contain; }
.sb-close { display: none; }

.page-hero, .hero { flex: 0 0 auto !important; background: linear-gradient(120deg, var(--gw-soft-blue), var(--gw-soft-green)); border-bottom: 1px solid var(--gw-line); }
.page-hero-inner, .hero-inner { width: min(1120px, 100%); margin: 0 auto; padding: 30px 24px; }
.page-hero h1, .hero h1 { margin: 0 0 8px; color: var(--gw-text); font-size: clamp(1.7rem, 3.5vw, 2.55rem); line-height: 1.15; }
.page-hero p, .hero p { max-width: 780px; margin: 0; color: var(--gw-muted); font-size: 1.02rem; line-height: 1.65; }
.content-wrap { width: min(1120px, calc(100% - 40px)); margin: 24px auto 38px; }
.content-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.card, .section, .paper, .video-card { background: var(--gw-surface); border: 1px solid var(--gw-line); border-radius: var(--gw-radius); box-shadow: var(--gw-shadow); }
.card { padding: 20px; }
.card h2, .card h3 { margin-top: 0; }
.card p:last-child { margin-bottom: 0; }
.eyebrow { display: block; margin-bottom: 7px; color: var(--gw-green); font-size: 0.76rem; font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase; }
.button-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.button, .btn { display: inline-block; padding: 10px 14px; color: #fff; background: var(--gw-blue-dark); border: 1px solid var(--gw-blue-dark); border-radius: 9px; font-weight: 700; text-decoration: none; box-shadow: none; }
.button.secondary, .btn.secondary { color: var(--gw-blue-dark); background: #fff; }
.button:hover, .btn:hover { color: #fff; background: var(--gw-blue); border-color: var(--gw-blue); }
.button.secondary:hover, .btn.secondary:hover { color: var(--gw-blue-dark); background: var(--gw-soft-blue); }
.status-row { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 18px; }
.status-pill { padding: 7px 10px; color: #315064; background: rgba(255, 255, 255, 0.82); border: 1px solid var(--gw-line); border-radius: 999px; font-size: 0.82rem; font-weight: 650; }

.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; counter-reset: gw-step; }
.step { position: relative; min-height: 150px; padding: 48px 17px 17px; background: #fff; border: 1px solid var(--gw-line); border-radius: var(--gw-radius); }
.step::before { counter-increment: gw-step; content: counter(gw-step); position: absolute; top: 15px; left: 17px; width: 25px; height: 25px; display: grid; place-items: center; color: #fff; background: var(--gw-green); border-radius: 50%; font-size: 0.78rem; font-weight: 800; }
.step h3 { margin: 0 0 7px; font-size: 1rem; }
.step p { margin: 0; color: var(--gw-muted); font-size: 0.9rem; line-height: 1.5; }
.section-heading { margin: 34px 0 14px; font-size: clamp(1.35rem, 2.5vw, 1.8rem); }
.notice { padding: 13px 15px; color: #3f5565; background: var(--gw-soft-blue); border-left: 4px solid var(--gw-blue); border-radius: 8px; }

.home-current-page .page-hero-inner { padding-top: 34px; padding-bottom: 34px; }
.home-current-page .page-hero h1 { max-width: 920px; font-size: clamp(2rem, 4vw, 3.15rem); }
.home-current-page .page-hero p { max-width: 900px; font-size: clamp(1rem, 1.7vw, 1.14rem); }
.home-current-page .map-stage { height: clamp(520px, calc(100vh - 300px), 780px); }
.home-map-help { display: grid; gap: 7px; margin-bottom: 12px; }
.home-map-help p { margin: 0; }
.home-after-map { width: min(1120px, calc(100% - 40px)); margin: 24px auto 38px; }
.home-explain-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.home-panel { padding: 22px; background: #fff; border: 1px solid var(--gw-line); border-radius: var(--gw-radius); box-shadow: var(--gw-shadow); }
.home-panel h2 { margin: 0 0 10px; font-size: clamp(1.25rem, 2.2vw, 1.65rem); }
.home-panel p { color: var(--gw-muted); line-height: 1.65; }
.storage-key { display: grid; gap: 8px; margin: 18px 0 0; }
.storage-key div { display: grid; grid-template-columns: 108px 1fr; gap: 10px; padding-top: 8px; border-top: 1px solid var(--gw-line); }
.storage-key dt { color: var(--gw-text); font-weight: 800; }
.storage-key dd { margin: 0; color: var(--gw-muted); font-size: 0.9rem; line-height: 1.45; }
.concept-row { display: grid; grid-template-columns: 1fr auto 1fr; gap: 10px; align-items: center; padding: 13px 0; }
.concept-row + .concept-row { border-top: 1px solid var(--gw-line); }
.concept-state { font-weight: 800; }
.concept-detail { display: block; margin-top: 3px; color: var(--gw-muted); font-size: 0.82rem; font-weight: 500; line-height: 1.4; }
.concept-arrow { color: var(--gw-blue-dark); font-size: 1.35rem; font-weight: 800; }
.drought-context { margin-top: 16px; }
.drought-context > p:last-child { margin-bottom: 0; }
.drought-context-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.drought-context-grid p { margin-top: 0; }
.context-links { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 16px; }
.context-links a { display: grid; gap: 5px; padding: 15px 16px; color: var(--gw-blue-dark); background: transparent; border-top: 2px solid #b9d4e3; text-decoration: none; }
.context-links a:hover, .context-links a:focus-visible { background: var(--gw-soft-blue); }
.context-links span { color: var(--gw-muted); font-size: 0.86rem; line-height: 1.45; }

.site-footer { margin-top: auto; padding: 24px; color: #506371; background: #eaf0f3; border-top: 1px solid var(--gw-line); font-size: 0.82rem; }
.site-footer-inner { width: min(1040px, 100%); margin: 0 auto; display: grid; grid-template-columns: 1.15fr 1fr; gap: 24px; }
.site-footer p { margin: 0 0 7px; line-height: 1.55; }
.site-footer p:last-child { margin-bottom: 0; }
.site-footer .disclaimer { font-size: 0.76rem; }
#sidebar-overlay { display: none; }

@media (max-width: 980px) {
  #header-container { position: relative; }
  .site-header { grid-template-columns: auto 1fr auto; gap: 10px; padding: 9px 12px; }
  .menu-btn { display: inline-flex; }
  .site-logo.um-logo { display: none; }
  .site-logo { height: 42px; max-width: 120px; }
  .site-title { text-align: left; }
  .site-title small { font-size: 0.72rem; }
  #sidebar-container { position: fixed !important; left: 0; top: 0; bottom: 0; z-index: 10050; width: min(86vw, 320px) !important; transform: translateX(-105%); transition: transform 0.2s ease; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25); }
  body.sidebar-open #sidebar-container { transform: translateX(0); }
  #sidebar-overlay { position: fixed; inset: 0; z-index: 10040; background: rgba(0, 0, 0, 0.38); }
  body.sidebar-open #sidebar-overlay { display: block; }
  .sidebar { position: static; min-height: 100%; }
  .sb-close { display: inline-flex; margin: 0 0 14px; padding: 8px 10px; border: 1px solid var(--gw-line); border-radius: 8px; background: #fff; cursor: pointer; }
  .content-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .site-footer-inner { grid-template-columns: 1fr; }
  .context-links { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .site-logo.partner-logo { display: none; }
  .site-header { grid-template-columns: auto 1fr; }
  .page-hero-inner, .hero-inner { padding: 24px 18px; }
  .content-wrap { width: min(100% - 28px, 1120px); }
  .steps { grid-template-columns: 1fr; }
  .home-after-map { width: min(100% - 28px, 1120px); }
  .home-explain-grid, .drought-context-grid { grid-template-columns: 1fr; }
  .storage-key div { grid-template-columns: 1fr; gap: 3px; }
}