:root {
  --platform-primary: #2957d7;
  --platform-primary-soft: #edf2ff;
  --platform-ink: #172033;
  --platform-muted: #6e7789;
  --platform-line: #e6eaf1;
  --platform-canvas: #f5f7fb;
  --platform-sidebar: 256px;
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }

body {
  margin: 0;
  color: var(--platform-ink);
  background: var(--platform-canvas);
  font-family: Inter, "Noto Sans TC", "Microsoft JhengHei", system-ui, sans-serif;
}

a { text-decoration: none; }
.material-symbols-outlined { font-size: 22px; font-variation-settings: "FILL" 0, "wght" 300, "GRAD" 0, "opsz" 24; }
.platform-shell { min-height: 100vh; }

.platform-sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 1030;
  width: var(--platform-sidebar);
  display: flex;
  flex-direction: column;
  padding: 24px 18px 18px;
  background: #fff;
  border-right: 1px solid var(--platform-line);
  transition: transform .22s ease;
}

.platform-brand { display: flex; align-items: center; gap: 12px; min-height: 48px; padding: 0 10px; color: var(--platform-ink); }
.brand-mark { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 12px; color: #fff; background: linear-gradient(145deg, #3165ec, #1f43aa); box-shadow: 0 8px 20px rgba(41, 87, 215, .25); font-weight: 700; }
.platform-brand strong, .platform-brand small { display: block; }
.platform-brand strong { font-size: 18px; line-height: 1.15; }
.platform-brand small { margin-top: 3px; color: var(--platform-muted); font-size: 11px; letter-spacing: .04em; }

.platform-nav { margin-top: 38px; }
.nav-caption { display: block; margin: 0 12px 9px; color: #a0a7b6; font-size: 11px; font-weight: 700; letter-spacing: .12em; }
.nav-caption-spaced { margin-top: 28px; }
.platform-nav-link { display: flex; align-items: center; gap: 13px; min-height: 46px; margin-bottom: 5px; padding: 0 13px; border-radius: 10px; color: #526078; font-size: 14px; font-weight: 600; transition: background .15s, color .15s, transform .15s; }
.platform-nav-link:hover { color: var(--platform-primary); background: #f5f7fc; transform: translateX(2px); }
.platform-nav-link.active { color: var(--platform-primary); background: var(--platform-primary-soft); }
.platform-nav-link.active .material-symbols-outlined { font-variation-settings: "FILL" 1, "wght" 400, "GRAD" 0, "opsz" 24; }

.sidebar-footer { display: flex; align-items: center; gap: 9px; margin-top: auto; padding: 14px 12px 2px; color: var(--platform-muted); border-top: 1px solid var(--platform-line); font-size: 12px; }
.environment-dot { width: 8px; height: 8px; border-radius: 50%; background: #28b67a; box-shadow: 0 0 0 4px #e8f8f1; }
.platform-main { min-height: 100vh; margin-left: var(--platform-sidebar); }

.platform-header { position: sticky; top: 0; z-index: 1020; height: 72px; display: flex; align-items: center; gap: 16px; padding: 0 32px; background: rgba(255, 255, 255, .94); border-bottom: 1px solid var(--platform-line); backdrop-filter: blur(10px); }
.header-context { display: flex; flex-direction: column; }
.header-context strong { font-size: 16px; }
.header-eyebrow { color: var(--platform-muted); font-size: 11px; }
.header-actions { display: flex; align-items: center; gap: 7px; margin-left: auto; }
.icon-button { width: 40px; height: 40px; display: grid; place-items: center; padding: 0; color: #4f5d75; background: transparent; border: 0; border-radius: 10px; }
.icon-button:hover { color: var(--platform-primary); background: var(--platform-primary-soft); }
.sidebar-toggle { display: none; }
.header-divider { width: 1px; height: 28px; margin: 0 10px; background: var(--platform-line); }
.account-chip { display: flex; align-items: center; gap: 10px; }
.account-avatar { width: 36px; height: 36px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: #263650; }
.account-copy small, .account-copy strong { display: block; line-height: 1.25; }
.account-copy small { color: var(--platform-muted); font-size: 10px; }
.account-copy strong { max-width: 150px; overflow: hidden; font-size: 13px; text-overflow: ellipsis; white-space: nowrap; }

.platform-content { max-width: 1480px; margin: 0 auto; padding: 34px 36px 56px; }
.page-heading { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 26px; }
.page-heading h1 { margin: 0 0 7px; font-size: 27px; font-weight: 700; letter-spacing: -.02em; }
.page-heading p { margin: 0; color: var(--platform-muted); font-size: 14px; }
.metric-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.metric-card, .content-card, .placeholder-card { background: #fff; border: 1px solid var(--platform-line); border-radius: 15px; box-shadow: 0 3px 12px rgba(22, 32, 51, .025); }
.metric-card { padding: 20px; }
.metric-icon { width: 42px; height: 42px; display: grid; place-items: center; margin-bottom: 20px; border-radius: 12px; color: var(--platform-primary); background: var(--platform-primary-soft); }
.metric-card small { color: var(--platform-muted); }
.metric-card strong { display: block; margin-top: 4px; font-size: 26px; }
.metric-card .pending-value { color: #a5abba; }
.dashboard-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 18px; margin-top: 18px; }
.content-card { min-height: 290px; padding: 24px; }
.content-card h2 { margin: 0; font-size: 16px; }
.card-heading { display: flex; align-items: center; justify-content: space-between; margin-bottom: 28px; }
.status-badge { padding: 5px 9px; color: #28785c; background: #e9f8f2; border-radius: 999px; font-size: 11px; font-weight: 700; }
.empty-state { height: 185px; display: grid; place-items: center; text-align: center; color: var(--platform-muted); }
.empty-state .material-symbols-outlined { display: block; margin: 0 auto 10px; color: #b7bfcd; font-size: 40px; }
.empty-state p { margin: 0; font-size: 13px; }
.placeholder-card { min-height: 360px; display: grid; place-items: center; padding: 42px; text-align: center; }
.placeholder-icon { width: 64px; height: 64px; display: grid; place-items: center; margin: 0 auto 18px; color: var(--platform-primary); background: var(--platform-primary-soft); border-radius: 18px; }
.placeholder-icon .material-symbols-outlined { font-size: 30px; }
.placeholder-card h2 { margin: 0 0 10px; font-size: 20px; }
.placeholder-card p { max-width: 520px; margin: 0; color: var(--platform-muted); font-size: 14px; line-height: 1.7; }
.phase-badge { display: inline-block; margin-top: 20px; padding: 6px 11px; color: #7b6330; background: #fff6dd; border-radius: 999px; font-size: 11px; font-weight: 700; }
.sidebar-backdrop { display: none; }
.access-page { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.access-card { width: min(520px, 100%); padding: 48px; text-align: center; background: #fff; border: 1px solid var(--platform-line); border-radius: 18px; box-shadow: 0 20px 50px rgba(23, 32, 51, .08); }
.access-code { display: block; color: var(--platform-primary); font-size: 54px; font-weight: 800; }
.access-card h1 { margin: 8px 0 10px; font-size: 23px; }
.access-card p { margin-bottom: 24px; color: var(--platform-muted); }

@media (max-width: 1100px) { .metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 800px) {
  .platform-sidebar { transform: translateX(-100%); }
  .platform-sidebar.open { transform: translateX(0); }
  .platform-main { margin-left: 0; }
  .sidebar-toggle { display: grid; }
  .sidebar-backdrop { position: fixed; inset: 0; z-index: 1025; background: rgba(20, 28, 43, .42); border: 0; }
  .sidebar-backdrop.show { display: block; }
  .platform-header { padding: 0 18px; }
  .platform-content { padding: 26px 18px 42px; }
  .account-copy { display: none; }
  .header-divider { margin: 0 3px; }
  .dashboard-grid { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .header-context .header-eyebrow { display: none; }
  .header-context strong { max-width: 110px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .metric-grid { grid-template-columns: 1fr; }
  .page-heading h1 { font-size: 24px; }
}