:root {
  color-scheme: light;
  --bg: #f6f7fb;
  --surface: #ffffff;
  --surface-soft: #eef3ff;
  --text: #172033;
  --muted: #697386;
  --line: #dce2ee;
  --primary: #2557d6;
  --primary-dark: #163b98;
  --accent: #13a27b;
  --danger: #c33535;
  --shadow: 0 18px 45px rgba(31, 44, 71, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  min-height: 100vh;
}

body.logged-out .app-shell {
  grid-template-columns: 1fr;
}

body.logged-out .sidebar {
  display: none;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
  background: #101827;
  color: #fff;
  padding: 28px;
}

.brand,
.session-card,
.topbar,
.panel-heading,
.list-item-header,
.student-meta,
.chip-row,
.topbar-actions {
  display: flex;
  align-items: center;
}

.brand {
  gap: 12px;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 8px;
  background: var(--primary);
  font-weight: 800;
}

.brand small,
.session-card small {
  display: block;
  color: #a9b3c7;
  margin-top: 2px;
}

.session-card {
  gap: 10px;
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--accent);
}

.nav-list {
  display: grid;
  gap: 8px;
}

.nav-item,
.ghost-button {
  width: 100%;
  border: 0;
  border-radius: 8px;
  color: #dfe6f4;
  background: transparent;
  padding: 12px 14px;
  text-align: left;
}

.nav-item.active,
.nav-item:hover,
.ghost-button:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.ghost-button {
  margin-top: auto;
}

.main {
  min-width: 0;
}

.login-view {
  display: grid;
  min-height: 100vh;
  padding: 28px;
  place-items: center;
  background:
    radial-gradient(circle at 16% 18%, rgba(19, 162, 123, 0.18), transparent 28%),
    radial-gradient(circle at 86% 12%, rgba(37, 87, 214, 0.16), transparent 30%),
    linear-gradient(135deg, #f8fbff 0%, #eef6f3 48%, #f7f9ff 100%);
}

.login-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  align-items: center;
  width: min(1180px, 100%);
}

.landing-copy {
  display: grid;
  gap: 30px;
  overflow: hidden;
  position: relative;
  padding: 28px;
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(246, 251, 255, 0.88)),
    linear-gradient(135deg, #ffffff, #eff8f5);
  box-shadow: var(--shadow);
}

.landing-copy::after {
  content: "";
  position: absolute;
  right: -80px;
  top: -80px;
  width: 220px;
  height: 220px;
  border-radius: 999px;
  background: rgba(19, 162, 123, 0.12);
}

.landing-nav,
.landing-logo {
  display: flex;
  align-items: center;
}

.landing-nav {
  position: relative;
  z-index: 1;
  justify-content: space-between;
  gap: 16px;
}

.landing-logo {
  gap: 12px;
}

.landing-logo small {
  display: block;
  margin-top: 2px;
  color: var(--muted);
}

.brand-mark-large {
  width: 58px;
  height: 58px;
  font-size: 1.4rem;
}

.hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(360px, 0.75fr);
  gap: 34px;
  align-items: center;
}

.landing-copy h1 {
  margin: 8px 0 18px;
  max-width: 680px;
  font-size: clamp(2.65rem, 5vw, 5.3rem);
  line-height: 0.98;
  letter-spacing: 0;
}

.hero-text {
  margin: 0;
  max-width: 620px;
  color: var(--muted);
  font-size: 1.12rem;
  line-height: 1.6;
}

.landing-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.landing-pill {
  border: 1px solid #dbe4fb;
  border-radius: 999px;
  background: #f4f7ff;
  color: var(--primary-dark);
  padding: 7px 11px;
  font-size: 0.82rem;
  font-weight: 800;
}

.landing-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 0;
}

.landing-actions span {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

.feature-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.feature-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
  padding: 16px;
}

.feature-card strong {
  display: block;
  margin-bottom: 8px;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.45;
}

.landing-preview {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 24px 60px rgba(31, 44, 71, 0.14);
  padding: 16px;
  transform: rotate(1deg);
}

.preview-window-bar {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
}

.preview-window-bar span {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: #ccd6ea;
}

.preview-header,
.preview-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.preview-label {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.preview-status {
  border-radius: 999px;
  background: #eaf8f3;
  color: #087052;
  padding: 6px 10px;
  font-size: 0.8rem;
  font-weight: 800;
}

.preview-score-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-top: 16px;
}

.preview-score-grid div {
  border-radius: 8px;
  background: #f2f6ff;
  padding: 12px;
}

.preview-score-grid span {
  display: block;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
}

.preview-score-grid strong {
  display: block;
  margin-top: 4px;
  font-size: 1.35rem;
}

.preview-body {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.preview-row {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcff;
  padding: 12px 14px;
}

.preview-row span {
  color: var(--muted);
  font-size: 0.92rem;
}

.preview-row strong {
  font-size: 0.95rem;
}

.preview-warning {
  background: #fffaf1;
  border-color: #f5ddb0;
}

body.auth-mode .login-panel {
  grid-template-columns: minmax(0, 1fr) 400px;
  width: min(1120px, 100%);
}

body.auth-mode .landing-copy {
  padding: 32px;
}

body.auth-mode .hero-layout {
  grid-template-columns: 1fr;
}

body.auth-mode .landing-copy h1 {
  font-size: clamp(2rem, 4vw, 3.35rem);
}

body.auth-mode .landing-pills,
body.auth-mode .landing-preview {
  display: none;
}

body.auth-mode .feature-grid {
  display: none;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.login-box,
.panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.login-box,
.form-panel {
  display: grid;
  gap: 16px;
}

.login-box {
  padding: 28px;
}

.form-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.login-box h2,
.panel h2,
.category-builder h3 {
  margin: 0;
}

label {
  display: grid;
  gap: 7px;
  color: #344054;
  font-size: 0.9rem;
  font-weight: 700;
}

input,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  padding: 11px 12px;
}

input:focus,
select:focus {
  border-color: var(--primary);
  outline: 3px solid rgba(37, 87, 214, 0.15);
}

.primary-button,
.secondary-button {
  border: 0;
  border-radius: 8px;
  padding: 12px 16px;
  font-weight: 800;
}

.primary-button {
  background: var(--primary);
  color: #fff;
}

.primary-button:hover {
  background: var(--primary-dark);
}

.secondary-button {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
}

.form-help,
.muted {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.error-text {
  min-height: 20px;
  margin: 0;
  color: var(--danger);
  font-weight: 700;
}

.workspace {
  padding: 32px;
}

.hidden {
  display: none;
}

.topbar {
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 28px;
}

.topbar h1 {
  margin: 0;
  font-size: clamp(1.7rem, 3vw, 2.5rem);
}

.topbar-actions {
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.view {
  display: none;
}

.view.active {
  display: grid;
  gap: 22px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.stat-card {
  display: grid;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 20px;
}

.stat-card span {
  color: var(--muted);
  font-weight: 700;
}

.stat-card strong {
  font-size: 2.25rem;
}

.kpi-breakdown {
  display: grid;
  gap: 14px;
}

.kpi-breakdown div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.kpi-breakdown span {
  color: var(--muted);
  font-weight: 700;
}

.kpi-breakdown strong {
  font-size: 2rem;
}

progress {
  width: 100%;
  height: 12px;
  overflow: hidden;
  border: 0;
  border-radius: 999px;
  background: var(--surface-soft);
}

progress::-webkit-progress-bar {
  border-radius: 999px;
  background: var(--surface-soft);
}

progress::-webkit-progress-value {
  border-radius: 999px;
  background: var(--accent);
}

progress::-moz-progress-bar {
  border-radius: 999px;
  background: var(--accent);
}

.chart-placeholder {
  display: grid;
  min-height: 150px;
  place-items: center;
  border: 1px dashed var(--line);
  border-radius: 8px;
  background: #fbfcff;
  color: var(--muted);
  padding: 18px;
  text-align: center;
}

.eligibility-box {
  display: grid;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcff;
  padding: 14px;
}

.eligibility-ok {
  color: #087052;
}

.eligibility-warning {
  color: #b25a00;
}

.split-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) minmax(0, 1.2fr);
  gap: 20px;
  align-items: start;
}

.panel {
  padding: 20px;
}

.panel-heading {
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 16px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.category-builder {
  display: grid;
  gap: 12px;
}

#categoryInputs {
  display: grid;
  gap: 10px;
}

.category-row {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1fr 38px;
  gap: 8px;
}

.icon-button {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--danger);
  font-size: 1.25rem;
  font-weight: 800;
}

.delete-competition {
  width: 38px;
  height: 38px;
  line-height: 1;
}

.delete-result {
  width: 38px;
  height: 38px;
  line-height: 1;
}

.list {
  display: grid;
  gap: 12px;
}

.list-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 14px;
}

.list-item-header {
  justify-content: space-between;
  gap: 12px;
}

.list-item-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.list-item h3 {
  margin: 0 0 4px;
  font-size: 1rem;
}

.list-item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.chip-row {
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.chip {
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--primary-dark);
  padding: 5px 9px;
  font-size: 0.78rem;
  font-weight: 800;
}

.student-meta {
  gap: 8px;
  flex-wrap: wrap;
}

.badge {
  border-radius: 8px;
  background: #ebf8f3;
  color: #087052;
  padding: 5px 8px;
  font-size: 0.78rem;
  font-weight: 800;
}

.empty-state {
  border: 1px dashed var(--line);
  border-radius: 8px;
  color: var(--muted);
  padding: 18px;
  text-align: center;
}

.rule-preview {
  display: grid;
  gap: 10px;
}

.admin-hidden .admin-only {
  display: none;
}

@media (max-width: 960px) {
  .app-shell,
  .login-panel,
  .hero-layout,
  .split-layout,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  body.auth-mode .login-panel {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    min-height: auto;
  }

  .landing-copy {
    padding: 30px;
  }

  .landing-preview {
    transform: none;
  }

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

@media (max-width: 720px) {
  .workspace,
  .login-view,
  .sidebar {
    padding: 20px;
  }

  .landing-copy {
    padding: 20px;
  }

  .landing-nav,
  .preview-header,
  .preview-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .landing-copy h1 {
    font-size: 2.45rem;
  }

  .preview-score-grid {
    grid-template-columns: 1fr;
  }

  .topbar,
  .list-item-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .form-row,
  .category-row {
    grid-template-columns: 1fr;
  }

  .icon-button {
    min-height: 40px;
  }
}