:root {
  --bg: #f7f2e7;
  --bg-2: #e5dccb;
  --panel: rgba(255, 252, 246, 0.92);
  --panel-border: rgba(22, 44, 65, 0.14);
  --text: #162c41;
  --muted: #596b78;
  --primary: #cc5a21;
  --primary-dark: #a14519;
  --secondary: #0d3b56;
  --secondary-dark: #082739;
  --danger: #a62d1f;
  --success: #1f7d4a;
  --radius: 28px;
  --shadow: 0 24px 48px rgba(22, 44, 65, 0.12);
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  min-height: 100%;
  color: var(--text);
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(204, 90, 33, 0.18), transparent 26%),
    radial-gradient(circle at bottom right, rgba(13, 59, 86, 0.16), transparent 34%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
}
body { padding: 16px; }
a { text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, select { font: inherit; }
.app-shell { width: min(100%, 1320px); margin: 0 auto; }
.hero-card, .panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}
.hero-card {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 24px;
  margin-bottom: 18px;
}
.hero-card.compact { align-items: center; }
.hero-brand { display: flex; gap: 18px; align-items: flex-start; }
.brand-logo {
  width: clamp(84px, 10vw, 126px);
  aspect-ratio: 1;
  object-fit: contain;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.75);
  padding: 10px;
}
.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--primary);
}
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 10px; font-size: clamp(2rem, 4vw, 3.3rem); line-height: 0.98; }
h2 { margin-bottom: 8px; font-size: clamp(1.35rem, 3vw, 1.9rem); }
h3 { margin-bottom: 6px; font-size: 1.02rem; }
.hero-text, .muted-text, .soft-card p, .soft-card span, .stamp-card small, .panel-head p { color: var(--muted); }
.stamp-card {
  min-width: 220px;
  max-width: 280px;
  padding: 18px 20px;
  border-radius: 24px;
  color: #fff;
  background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
}
.stamp-card strong { display: block; font-size: 1.05rem; margin-bottom: 8px; }
.stamp-label, .timer-label {
  display: block;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  opacity: 0.86;
}
.prep-layout, .test-layout, .results-layout { display: grid; gap: 18px; }
.prep-layout, .test-layout { grid-template-columns: 1.15fr 0.95fr; }
.results-layout { grid-template-columns: 1fr; }
.panel { padding: 22px; }
.panel-visual { display: grid; gap: 16px; align-content: start; }
.field-label { display: block; margin-bottom: 10px; font-weight: 800; }
.form-block + .form-block { margin-top: 24px; }
.inline-field, .actions-row, .topbar-actions, .history-head { display: flex; gap: 12px; flex-wrap: wrap; }
.input, .button, .segment { border-radius: 18px; border: 0; }
.input {
  width: 100%;
  min-height: 54px;
  padding: 14px 16px;
  border: 1px solid rgba(22, 44, 65, 0.16);
  background: rgba(255, 255, 255, 0.9);
  color: var(--text);
}
.input-grow { flex: 1; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  padding: 14px 18px;
  font-weight: 800;
  cursor: pointer;
  transition: transform 0.18s ease, opacity 0.18s ease;
}
.button:hover:not(:disabled) { transform: translateY(-1px); }
.button:disabled { opacity: 0.52; cursor: not-allowed; }
.button-primary { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; }
.button-secondary { background: linear-gradient(135deg, var(--secondary), var(--secondary-dark)); color: #fff; }
.button-ghost { background: rgba(13, 59, 86, 0.08); color: var(--secondary); }
.button-danger { background: linear-gradient(135deg, #d44b39, var(--danger)); color: #fff; }
.button-success { background: linear-gradient(135deg, #249c5a, var(--success)); color: #fff; }
.button-large { min-height: 64px; }
.button-xl { min-height: 78px; font-size: clamp(1.05rem, 2vw, 1.3rem); }
.segmented-control { display: flex; gap: 10px; flex-wrap: wrap; }
.segment {
  min-height: 54px;
  min-width: 120px;
  padding: 12px 18px;
  background: rgba(13, 59, 86, 0.08);
  color: var(--secondary);
  font-weight: 800;
  cursor: pointer;
}
.segment.is-active { background: var(--secondary); color: #fff; }
.card-grid { display: grid; gap: 12px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.compact-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.soft-card, .timer-card, .history-box {
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(22, 44, 65, 0.1);
  padding: 16px;
}
.soft-card strong { display: block; margin-top: 8px; font-size: 1.15rem; }
.info-card-stack {
  display: grid;
  gap: 12px;
}

.toggle-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.toggle-row input {
  width: 20px;
  height: 20px;
}
.status-online {
  color: var(--success);
  font-weight: 900;
}

.status-offline {
  color: var(--danger);
  font-weight: 900;
}
.pill-list { display: flex; flex-wrap: wrap; gap: 10px; }
.pill-list span {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(13, 59, 86, 0.08);
  font-weight: 700;
}
.protocol-list { margin: 0; padding-left: 18px; display: grid; gap: 10px; }
.terrain-visual {
  width: 100%;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.72);
  padding: 10px;
}
.phase-chip {
  display: inline-flex;
  align-items: center;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(13, 59, 86, 0.08);
  color: var(--secondary);
  font-weight: 800;
}
.primary-status {
  margin-bottom: 4px;
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  line-height: 1.06;
  font-weight: 900;
}
.timer-card {
  background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
  color: #fff;
  padding: clamp(18px, 4vw, 28px);
}
.countdown-display {
  display: block;
  margin-top: 6px;
  font-size: clamp(3rem, 14vw, 6.4rem);
  line-height: 0.9;
  letter-spacing: -0.06em;
}
.stats-grid .soft-card strong { font-size: 1.25rem; }
.actions-column, .result-panel { display: grid; gap: 12px; }
.alert-banner { padding: 14px 16px; border-radius: 18px; font-weight: 800; }
.alert-success { color: var(--success); background: rgba(31, 125, 74, 0.12); }
.alert-danger { color: var(--danger); background: rgba(166, 45, 31, 0.12); }
.table-wrapper { overflow: auto; -webkit-overflow-scrolling: touch; }
.history-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 680px;
}
.history-table th, .history-table td {
  padding: 11px 12px;
  border-bottom: 1px solid rgba(22, 44, 65, 0.09);
  text-align: left;
  white-space: nowrap;
}
.history-table th { position: sticky; top: 0; background: rgba(255, 252, 246, 0.96); }
#historyChart, #resultsChart {
  width: 100%;
  height: auto;
  margin-bottom: 16px;
  border-radius: 20px;
  border: 1px solid rgba(22, 44, 65, 0.1);
  background: #f6efe1;
}

#resultsChart {
  display: block;
  min-height: 220px;
}
.dialog { border: none; background: transparent; padding: 0; }
.dialog::backdrop { background: rgba(10, 20, 28, 0.56); }
.dialog-card {
  width: min(92vw, 420px);
  border-radius: 24px;
  background: #fffaf2;
  padding: 22px;
  box-shadow: var(--shadow);
}

@media (max-width: 900px) {
  .prep-layout,
  .test-layout {
    grid-template-columns: 1fr;
  }

  .hero-card {
    flex-direction: column;
  }

  .stamp-card {
    max-width: none;
  }
}

@media (max-width: 960px) {
  .hero-brand {
    width: 100%;
  }
}
@media (max-width: 720px) {
  body { padding: 10px; }
  .panel, .hero-card { padding: 16px; border-radius: 22px; }
  .card-grid, .compact-grid { grid-template-columns: 1fr; }
  .hero-brand { flex-direction: column; align-items: flex-start; }
  .inline-field, .actions-row, .topbar-actions, .segmented-control, .history-head { flex-direction: column; }
  .button, .segment { width: 100%; }
  .history-table { min-width: 560px; }
}

@media (max-width: 680px) {
  .prep-layout {
    gap: 12px;
  }

  .prep-layout .panel,
  .prep-layout .panel-visual {
    padding: 14px;
  }

  .prep-layout .form-block + .form-block {
    margin-top: 18px;
  }

  .prep-layout .card-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .prep-layout .soft-card,
  .prep-layout .terrain-visual {
    padding: 14px;
  }

  .prep-layout .soft-card strong,
  .prep-layout .soft-card span,
  .prep-layout .soft-card p,
  .prep-layout .panel-head p {
    word-break: break-word;
  }

  .prep-layout .pill-list {
    gap: 8px;
  }

  .prep-layout .pill-list span {
    width: 100%;
    border-radius: 18px;
  }

  .prep-layout .actions-row,
  .prep-layout .inline-field {
    gap: 10px;
  }

  .prep-layout .actions-row .button,
  .prep-layout .inline-field .button,
  .prep-layout .inline-field .input {
    width: 100%;
  }

  .prep-layout .protocol-list {
    gap: 8px;
    padding-left: 16px;
  }
}

@media (max-width: 680px) {
  .test-layout {
    gap: 12px;
  }

  .panel-session-main,
  .panel-session-side {
    padding: 14px;
  }

  .timer-card {
    padding: 16px;
    border-radius: 22px;
  }

  .countdown-display {
    font-size: clamp(2.8rem, 18vw, 4.8rem);
    line-height: 0.92;
    word-break: break-word;
  }

  .primary-status {
    font-size: clamp(1.35rem, 6vw, 1.9rem);
  }

  .stats-grid,
  .compact-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .panel-session-main .soft-card,
  .panel-session-side .soft-card,
  .history-box {
    padding: 14px;
  }

  .panel-session-main .soft-card strong,
  .panel-session-side .soft-card strong {
    font-size: 1.05rem;
  }

  .actions-column {
    gap: 10px;
  }

  .actions-column .button {
    width: 100%;
  }

  .result-panel {
    gap: 10px;
  }

  .panel-session-side .history-head {
    gap: 10px;
  }

  .panel-session-side .history-head .button {
    width: 100%;
  }

  #historyChart {
    min-height: 180px;
    margin-bottom: 12px;
  }

  .panel-session-side .table-wrapper {
    margin: 0 -4px;
  }

  .panel-session-side .history-table {
    min-width: 520px;
  }

  .panel-session-side .history-table th,
  .panel-session-side .history-table td {
    padding: 10px;
    font-size: 0.82rem;
  }
}

@media (max-width: 420px) {
  body {
    padding: 8px;
  }

  .panel-session-main,
  .panel-session-side {
    padding: 12px;
  }

  .phase-chip {
    width: 100%;
    justify-content: center;
    text-align: center;
  }

  .timer-card {
    padding: 14px;
  }

  .countdown-display {
    font-size: clamp(2.4rem, 17vw, 3.9rem);
  }

  .primary-status,
  .muted-text,
  .panel-head p,
  .soft-card span,
  .soft-card strong {
    word-break: break-word;
  }

  #historyChart {
    min-height: 160px;
  }

  .panel-session-side .history-table {
    min-width: 470px;
  }
}

@media (max-width: 560px) {
  .hero-card {
    gap: 14px;
  }

  .brand-logo {
    width: 88px;
  }

  h1 {
    font-size: clamp(1.65rem, 8vw, 2.15rem);
  }

  h2 {
    font-size: clamp(1.15rem, 5.5vw, 1.45rem);
  }

  .stamp-card {
    min-width: 0;
    width: 100%;
    padding: 14px;
  }

  .dialog-card {
    width: min(94vw, 420px);
    padding: 18px;
    border-radius: 20px;
  }

  .results-layout {
    gap: 12px;
  }

  .results-layout .panel {
    padding: 14px;
  }

  .results-layout .inline-field {
    gap: 10px;
  }

  .results-layout .input,
  .results-layout .button {
    width: 100%;
  }

  .results-layout .compact-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .results-layout .soft-card {
    padding: 14px;
  }

  .results-layout .soft-card strong,
  .results-layout .soft-card span,
  .results-layout .panel-head p {
    word-break: break-word;
  }

  .results-layout .soft-card strong {
    font-size: 1.05rem;
  }

  #resultsChart {
    min-height: 180px;
    margin-bottom: 12px;
  }

  .results-layout .table-wrapper {
    margin: 0 -4px;
  }

  .results-layout .history-table {
    min-width: 520px;
  }

  .results-layout .history-table th,
  .results-layout .history-table td {
    padding: 10px;
    font-size: 0.82rem;
  }
}

@media (max-width: 400px) {
  body {
    padding: 8px;
  }

  .hero-card,
  .panel {
    border-radius: 18px;
  }

  .results-layout .panel {
    padding: 12px;
  }

  .results-layout .soft-card {
    border-radius: 18px;
  }

  #resultsChart {
    min-height: 160px;
  }

  .results-layout .history-table {
    min-width: 480px;
  }

  .prep-layout .panel,
  .prep-layout .panel-visual {
    padding: 12px;
  }

  .prep-layout .soft-card,
  .prep-layout .terrain-visual,
  .prep-layout .pill-list span {
    border-radius: 18px;
  }

  .prep-layout .button-xl,
  .prep-layout .button-large {
    min-height: 60px;
    font-size: 1rem;
  }
}