/* VoltOps light control-room tokens — DESIGN.md / docs/DESIGN_SYSTEM.md */
:root {
  --canvas: #F4F7FB;
  --surface: #FFFFFF;
  --surface-warm: #FFFDF7;
  --border: #D9E2EC;
  --rule: #CBBDA7;
  --ink: #14213D;
  --ink-strong: #202B30;
  --muted: #6F756F;
  --primary: #1769E0;
  --primary-ink: #FFFDF7;
  --accent: #E3AA32;
  --connected: #14805E;
  --charging: #0B8FBC;
  --warning: #C77800;
  --fault: #C73E4D;
  --success: #2F7660;
  --error: #B84031;
  --radius-sm: 2px;
  --radius-md: 6px;
  --radius-lg: 10px;
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --shadow: 0 1px 0 rgba(20, 33, 61, 0.04), 0 8px 24px rgba(20, 33, 61, 0.06);
  --font-sans: "Public Sans", "Pretendard", "Noto Sans KR", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "SF Mono", ui-monospace, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--canvas);
}

img,
svg {
  max-width: 100%;
  display: block;
}

a {
  color: var(--primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--ink-strong);
}

h1, h2, h3 {
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--ink-strong);
  margin: 0 0 var(--space-md);
}

.phase2-grid {
  align-items: start;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.phase2-grid .card {
  min-width: 0;
  overflow: hidden;
}

.phase2-grid .table-wrap {
  max-width: 100%;
  overflow-x: auto;
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.85em;
  word-break: break-all;
}

.page-head {
  margin-bottom: var(--space-lg);
}

.page-head .proof-strip {
  margin-top: var(--space-md);
}

@media (max-width: 720px) {
  .phase2-grid {
    display: flex;
    flex-direction: column;
  }
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  /* CJK display floor ≥1.08 — avoid glyph clipping on 1440/390 */
  line-height: 1.12;
}

h2 {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 700;
}

h3 {
  font-size: 1.05rem;
  font-weight: 650;
}

p {
  margin: 0 0 var(--space-md);
}

.muted {
  color: var(--muted);
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.label-caps {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Layout shells */
.public-shell,
.app-shell {
  min-height: 100vh;
}

.public-shell {
  background:
    linear-gradient(180deg, #FFFFFF 0%, var(--canvas) 220px),
    var(--canvas);
}

.public-header,
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--ink-strong);
  text-decoration: none;
  font-weight: 700;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-md);
  background: var(--primary);
  color: var(--primary-ink);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
}

.nav-links a {
  color: var(--ink);
  text-decoration: none;
  padding: 8px 10px;
  border-radius: var(--radius-md);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.nav-links a:hover {
  background: var(--canvas);
}

.container {
  width: min(1200px, calc(100% - 2 * var(--space-md)));
  margin: 0 auto;
  padding: var(--space-lg) 0 var(--space-2xl, 48px);
}

.container-wide {
  width: min(1440px, calc(100% - 2 * var(--space-md)));
  margin: 0 auto;
  padding: var(--space-md) 0 var(--space-xl);
}

/* Buttons */
.btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  padding: 12px 16px;
  min-height: 44px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  transition: transform 200ms ease-out, background-color 200ms ease-out, border-color 200ms ease-out;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--primary);
  color: var(--primary-ink);
}

.btn-primary:hover {
  background: #1257ba;
  color: var(--primary-ink);
}

.btn-secondary {
  background: var(--surface);
  color: var(--ink-strong);
  border-color: var(--border);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-danger {
  background: var(--surface);
  color: var(--fault);
  border-color: #f0c4ca;
}

.btn-danger:hover {
  background: #fff5f6;
}

.btn-block {
  width: 100%;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

/* Cards / panels */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  box-shadow: var(--shadow);
}

.card + .card {
  margin-top: var(--space-md);
}

.panel-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.panel-title h2,
.panel-title h3 {
  margin: 0;
}

/* Status chips */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  border: 1px solid var(--border);
  background: var(--canvas);
  color: var(--ink);
  white-space: nowrap;
}

.chip::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--muted);
}

.chip-connected,
.chip-available {
  color: var(--connected);
  border-color: #b7e0d1;
  background: #f0faf6;
}
.chip-connected::before,
.chip-available::before { background: var(--connected); }

.chip-charging {
  color: var(--charging);
  border-color: #b6e3f1;
  background: #f0faff;
}
.chip-charging::before { background: var(--charging); }

.chip-warning,
.chip-preparing,
.chip-timeout {
  color: var(--warning);
  border-color: #f0d7a8;
  background: #fff8ec;
}
.chip-warning::before,
.chip-preparing::before,
.chip-timeout::before { background: var(--warning); }

.chip-fault,
.chip-faulted,
.chip-error,
.chip-failed,
.chip-rejected {
  color: var(--fault);
  border-color: #f0c4ca;
  background: #fff5f6;
}
.chip-fault::before,
.chip-faulted::before,
.chip-error::before,
.chip-failed::before,
.chip-rejected::before { background: var(--fault); }

.chip-disconnected,
.chip-unavailable {
  color: var(--muted);
}
.chip-accepted,
.chip-sent,
.chip-completed {
  color: var(--success);
  border-color: #b7e0d1;
  background: #f0faf6;
}
.chip-accepted::before,
.chip-sent::before,
.chip-completed::before { background: var(--success); }

/* Tables */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

table.data {
  width: 100%;
  border-collapse: collapse;
  min-width: 520px;
}

table.data th,
table.data td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

table.data th {
  position: sticky;
  top: 0;
  background: var(--surface);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
}

table.data td.num {
  text-align: right;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

table.data tr:hover td {
  background: #f8fafc;
}

/* Public landing */
.hero {
  display: grid;
  gap: var(--space-lg);
  padding: var(--space-xl) 0 var(--space-lg);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-lg);
  align-items: start;
}

.proof-strip {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin: var(--space-md) 0 var(--space-lg);
}

.proof-item {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  min-width: 120px;
}

.proof-item strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--ink-strong);
}

.flow-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-sm);
}

.flow-list li {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: var(--space-sm);
  align-items: start;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.flow-list .step {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--canvas);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--primary);
}

.roadmap {
  border-left: 3px solid var(--accent);
  padding-left: var(--space-md);
  color: var(--muted);
}

/* Login */
.login-wrap {
  width: min(420px, 100%);
  margin: var(--space-xl) auto;
}

.form-field {
  display: grid;
  gap: 6px;
  margin-bottom: var(--space-md);
}

.form-field label {
  font-weight: 600;
  color: var(--ink-strong);
}

.form-field input,
.form-field select {
  min-height: 44px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  font: inherit;
  background: var(--surface);
  color: var(--ink);
}

.form-field input:focus,
.form-field select:focus {
  outline: 2px solid rgba(23, 105, 224, 0.25);
  border-color: var(--primary);
}

.alert {
  border-radius: var(--radius-md);
  padding: 12px 14px;
  margin-bottom: var(--space-md);
  border: 1px solid var(--border);
}

.alert-error {
  background: #fff5f6;
  border-color: #f0c4ca;
  color: var(--fault);
}

.alert-info {
  background: #f0faff;
  border-color: #b6e3f1;
  color: var(--charging);
}

/* Operator dashboard grid */
.ops-summary {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.stat-card .value {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--ink-strong);
  line-height: 1.2;
}

.ops-grid {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr) 320px;
  gap: var(--space-md);
  align-items: start;
}

.fleet-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-sm);
}

.fleet-item {
  display: block;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px;
  background: var(--canvas);
  text-decoration: none;
  color: inherit;
  transition: border-color 200ms ease-out, transform 200ms ease-out;
}

.fleet-item:hover {
  border-color: var(--primary);
  transform: translateY(-1px);
}

.fleet-item .name {
  font-weight: 650;
  color: var(--ink-strong);
}

.fleet-item .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.timeline li {
  border-left: 2px solid var(--border);
  padding-left: 12px;
}

.timeline .when {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
}

.timeline .what {
  font-size: 0.95rem;
}

.event-payload {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
  word-break: break-word;
  max-height: 3.2em;
  overflow: hidden;
}

/* Charger detail */
.detail-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-md);
}

.detail-grid > .stack,
.detail-grid .card {
  min-width: 0;
}

.command-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

/* Simulator */
.sim-layout {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: var(--space-md);
}

.log-box {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.5;
  background: #0f172a0a;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px;
  min-height: 320px;
  max-height: 520px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--ink-strong);
}

.stack {
  display: grid;
  gap: var(--space-sm);
}

.footer-note {
  margin-top: var(--space-xl);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}

/* Mobile card rows for tables */
.mobile-cards {
  display: none;
}

/* 390px accessibility & overflow */
@media (max-width: 960px) {
  .hero-grid,
  .ops-grid,
  .detail-grid,
  .sim-layout {
    grid-template-columns: 1fr;
  }

  .ops-summary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .public-header,
  .app-header {
    padding: var(--space-md);
    flex-wrap: wrap;
  }
}

@media (max-width: 520px) {
  .ops-summary {
    grid-template-columns: 1fr;
  }

  table.data {
    min-width: 100%;
  }

  .hide-mobile {
    display: none !important;
  }

  .desktop-table {
    display: none;
  }

  .mobile-cards {
    display: grid;
    gap: var(--space-sm);
  }

  .mobile-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 12px;
    background: var(--canvas);
  }

  .mobile-card .row {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    padding: 4px 0;
    font-size: 0.95rem;
  }

  .mobile-card .row span:last-child {
    font-family: var(--font-mono);
    text-align: right;
  }

  .container,
  .container-wide {
    width: calc(100% - 2 * var(--space-md));
  }

  body {
    overflow-x: hidden;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}