:root {
  color-scheme: dark;
  --bg: #07111f;
  --bg-soft: #0d1b2e;
  --panel: rgba(15, 29, 50, 0.78);
  --panel-strong: #12223a;
  --text: #eef6ff;
  --muted: #9db0c8;
  --line: rgba(158, 180, 210, 0.18);
  --primary: #45e4ff;
  --primary-strong: #18b7df;
  --accent: #8b5cf6;
  --success: #34d399;
  --warning: #fbbf24;
  --danger: #fb7185;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 12% 8%, rgba(69, 228, 255, 0.22), transparent 30rem),
    radial-gradient(circle at 88% 3%, rgba(139, 92, 246, 0.24), transparent 28rem),
    linear-gradient(180deg, #07111f 0%, #0a1424 42%, #07111f 100%);
  color: var(--text);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background-image: linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, black, transparent 88%);
}

button,
input,
select,
textarea {
  font: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: -5rem;
  z-index: 100;
  border-radius: 999px;
  background: var(--primary);
  color: #03111d;
  padding: 0.75rem 1rem;
  font-weight: 800;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 17, 31, 0.78);
  backdrop-filter: blur(18px);
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 0.85rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  min-height: 44px;
}

.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #02101a;
  font-weight: 900;
  box-shadow: 0 12px 28px rgba(69, 228, 255, 0.22);
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  font-size: 0.78rem;
}

.site-menu {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.site-menu a,
.menu-toggle {
  min-height: 44px;
  border-radius: 999px;
  padding: 0.72rem 1rem;
  color: var(--muted);
  font-weight: 700;
  transition: 180ms ease;
}

.site-menu a:hover,
.site-menu a:focus-visible,
.menu-toggle:hover,
.menu-toggle:focus-visible {
  outline: none;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
}

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  background: transparent;
}

.section {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 5rem 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.75fr);
  gap: 2rem;
  align-items: center;
  min-height: calc(100dvh - 74px);
}

.eyebrow {
  margin: 0 0 0.8rem;
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 840px;
  margin-bottom: 1.2rem;
  font-size: clamp(2.6rem, 7vw, 5.9rem);
  line-height: 0.93;
  letter-spacing: -0.07em;
}

h2 {
  margin-bottom: 0.8rem;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1;
  letter-spacing: -0.05em;
}

h3 {
  margin-bottom: 0.6rem;
}

.hero-text,
.section-heading p,
.feature-grid p,
.form-note,
.empty-state,
.site-footer {
  color: var(--muted);
  line-height: 1.7;
}

.hero-text {
  max-width: 690px;
  font-size: 1.08rem;
}

.hero-actions,
.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.82rem 1.1rem;
  cursor: pointer;
  font-weight: 800;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease, color 180ms ease;
}

.button:hover,
.button:focus-visible {
  outline: none;
  transform: translateY(-1px);
}

.button.primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  color: #03111d;
  box-shadow: 0 16px 34px rgba(69, 228, 255, 0.2);
}

.button.secondary,
.button.ghost {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}

.button.danger {
  border-color: rgba(251, 113, 133, 0.35);
  background: rgba(251, 113, 133, 0.12);
  color: #fecdd3;
}

.traffic-card,
.panel,
.feature-grid article,
.rotation-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(18, 34, 58, 0.92), rgba(13, 27, 46, 0.72));
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.traffic-card {
  padding: 1.4rem;
}

.card-topline,
.table-toolbar,
.section-heading.split {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.card-topline {
  margin-bottom: 1rem;
  color: var(--muted);
  font-weight: 800;
}

.card-topline strong {
  border-radius: 999px;
  background: rgba(52, 211, 153, 0.12);
  color: var(--success);
  padding: 0.35rem 0.65rem;
  font-size: 0.8rem;
}

.traffic-meter {
  overflow: hidden;
  height: 14px;
  margin-bottom: 1.2rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
}

.traffic-meter span {
  display: block;
  width: 68%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--success), var(--primary), var(--accent));
  transition: width 500ms ease;
}

.traffic-grid,
.feature-grid,
.panel-grid,
.result-stats,
.rotation-preview {
  display: grid;
  gap: 1rem;
}

.traffic-grid {
  grid-template-columns: repeat(2, 1fr);
}

.traffic-grid div,
.result-stats div,
.rotation-preview div {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.055);
  padding: 1rem;
}

.traffic-grid span,
.result-stats strong,
.rotation-preview strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 1.45rem;
  font-weight: 900;
}

.traffic-grid small,
.result-stats span,
.rotation-preview span {
  color: var(--muted);
}

.section-heading {
  max-width: 780px;
  margin-bottom: 1.5rem;
}

.section-heading.split {
  max-width: none;
  align-items: end;
}

.feature-grid {
  grid-template-columns: repeat(4, 1fr);
}

.feature-grid article {
  padding: 1.2rem;
}

.feature-icon {
  display: inline-flex;
  margin-bottom: 1rem;
  border-radius: 999px;
  background: rgba(69, 228, 255, 0.12);
  color: var(--primary);
  padding: 0.35rem 0.6rem;
  font-weight: 900;
}

.app-section {
  padding-top: 4rem;
}

.summary-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: flex-end;
}

.summary-pills span {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  padding: 0.6rem 0.8rem;
  color: var(--muted);
  font-weight: 700;
}

.summary-pills strong {
  color: var(--text);
}

.panel-grid {
  grid-template-columns: 1fr 0.82fr;
  align-items: start;
}

.checker-grid {
  grid-template-columns: 1fr 1fr;
}

.panel {
  padding: 1.1rem;
}

label {
  display: grid;
  gap: 0.45rem;
  margin-bottom: 0.95rem;
  color: #dceaff;
  font-size: 0.92rem;
  font-weight: 800;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(3, 12, 24, 0.62);
  color: var(--text);
  padding: 0.78rem 0.9rem;
  outline: none;
}

textarea {
  resize: vertical;
  min-height: 130px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  line-height: 1.55;
}

input:focus,
select:focus,
textarea:focus {
  border-color: rgba(69, 228, 255, 0.72);
  box-shadow: 0 0 0 4px rgba(69, 228, 255, 0.12);
}

.form-row.two {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.8rem;
}

.form-note {
  margin: 0.9rem 0 0;
  font-size: 0.9rem;
}

.table-toolbar {
  margin: 1.4rem 0 0.8rem;
}

.table-toolbar h3 {
  margin: 0;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  min-width: 860px;
  border-collapse: collapse;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 0.85rem 0.7rem;
  text-align: left;
  vertical-align: top;
}

th {
  color: #cfe1fb;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

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

.mono {
  color: var(--text);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.88rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.28rem 0.55rem;
  font-size: 0.78rem;
  font-weight: 900;
}

.badge.live {
  background: rgba(52, 211, 153, 0.13);
  color: #86efac;
}

.badge.die {
  background: rgba(251, 113, 133, 0.13);
  color: #fda4af;
}

.badge.unchecked {
  background: rgba(251, 191, 36, 0.13);
  color: #fde68a;
}

.empty-state {
  display: none;
  margin: 1rem 0 0;
  text-align: center;
}

.empty-state.visible {
  display: block;
}

.result-stats,
.rotation-preview {
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 1rem;
}

.rotation-preview {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.result-stats div,
.rotation-preview div {
  box-shadow: none;
}

.rotation-list {
  display: grid;
  gap: 1rem;
}

.rotation-card {
  display: grid;
  gap: 0.6rem;
  padding: 1rem;
}

.rotation-card header,
.rotation-card-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.rotation-card-actions {
  flex-wrap: wrap;
  justify-content: flex-end;
}

.rotation-card h4 {
  margin: 0;
}

.rotation-card pre {
  overflow: auto;
  max-height: 180px;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(3, 12, 24, 0.58);
  padding: 0.8rem;
  color: var(--muted);
  white-space: pre-wrap;
}

.site-footer {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  border-top: 1px solid var(--line);
  padding: 2rem 0 3rem;
  text-align: center;
}

.toast {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 80;
  max-width: min(420px, calc(100% - 2rem));
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(18, 34, 58, 0.96);
  padding: 0.9rem 1rem;
  color: var(--text);
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(16px);
  transition: 180ms ease;
  pointer-events: none;
}

.toast.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 940px) {
  .hero,
  .panel-grid,
  .checker-grid,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .section-heading.split {
    display: grid;
    align-items: start;
  }

  .summary-pills {
    justify-content: flex-start;
  }
}

@media (max-width: 720px) {
  .menu-toggle {
    display: inline-flex;
  }

  .site-menu {
    position: absolute;
    top: calc(100% + 1px);
    right: 1rem;
    left: 1rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: rgba(7, 17, 31, 0.96);
    padding: 0.6rem;
  }

  .site-menu.open {
    display: flex;
  }

  .form-row.two,
  .traffic-grid,
  .result-stats {
    grid-template-columns: 1fr;
  }

  .section {
    width: min(100% - 1rem, 1180px);
    padding: 3rem 0;
  }

  h1 {
    font-size: clamp(2.35rem, 16vw, 4rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}


.utility-panel {
  margin: 1.4rem 0;
}

.file-button {
  margin: 0;
}


.account-warning {
  padding-top: 2rem;
  padding-bottom: 0;
}

.warning-panel {
  border-color: rgba(251, 191, 36, 0.35);
  background: linear-gradient(180deg, rgba(91, 62, 17, 0.45), rgba(18, 34, 58, 0.86));
}

.user-badge {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.55rem 0.8rem;
  color: var(--primary);
  font-weight: 900;
}

.button.small {
  padding-inline: 0.85rem;
}


.group-stats-panel {
  margin: 1.4rem 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1rem;
}

.stats-grid div {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.055);
  padding: 1rem;
}

.stats-grid strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 1.45rem;
  font-weight: 900;
}

.stats-grid span {
  color: var(--muted);
}

@media (max-width: 940px) {
  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}