:root {
  --primary: #1565c0;
  --primary-light: #1e88e5;
  --accent: #29b6f6;
  --bg: #eff6ff;
  --card: rgba(255, 255, 255, 0.94);
  --card-strong: #ffffff;
  --text: #10233a;
  --muted: #5d7288;
  --success: #2e7d32;
  --warning: #f57f17;
  --danger: #c62828;
  --line: #d8e6f7;
  --shadow: 0 16px 38px rgba(20, 63, 118, 0.08);
  --shadow-soft: 0 10px 22px rgba(21, 101, 192, 0.06);
  --sidebar-w: 284px;
  --radius-xl: 24px;
  --radius-lg: 18px;
  --radius-md: 14px;
  --container: 1180px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "DM Sans", "Segoe UI", "Helvetica Neue", sans-serif;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(41, 182, 246, 0.24), transparent 22rem),
    radial-gradient(circle at top right, rgba(21, 101, 192, 0.10), transparent 20rem),
    linear-gradient(180deg, #f9fbfe, var(--bg));
}

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

h1, h2, h3 {
  margin: 0;
  line-height: 1.15;
}

p {
  margin: 0;
}

input, select, textarea, button {
  font: inherit;
  width: 100%;
  display: block;
  margin: 0;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  padding: 0.8rem 0.95rem;
  transition: border-color 0.16s ease, box-shadow 0.16s ease, transform 0.16s ease;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary-light);
  box-shadow: 0 0 0 4px rgba(30, 136, 229, 0.12);
}

button {
  width: auto;
  border: 0;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  cursor: pointer;
  font-weight: 700;
}

button:hover {
  transform: translateY(-1px);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

.shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr;
}

.sidebar {
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.84);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(216, 230, 247, 0.9);
}

.sidebar-inner {
  width: min(var(--container), 100%);
  margin: 0 auto;
}

.sidebar-top {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.brand {
  min-width: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-mark {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 16px;
  display: inline-grid;
  place-items: center;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-weight: 800;
  box-shadow: var(--shadow-soft);
}

.brand-text {
  display: grid;
  gap: 0.05rem;
}

.brand-name {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-subtitle {
  color: var(--muted);
  font-size: 0.76rem;
}

.lite {
  font-style: italic;
}

.nav-toggle {
  margin-left: auto;
  width: 2.9rem;
  min-width: 2.9rem;
  padding: 0.72rem 0;
  border-radius: 12px;
  background: #fff;
  color: var(--text);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}

.sidebar-user {
  margin-top: 1rem;
  padding: 0.95rem 1rem;
  border: 1px solid rgba(216, 230, 247, 0.9);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(227, 242, 253, 0.7), rgba(255, 255, 255, 0.95));
}

.sidebar-user strong {
  display: block;
  font-size: 0.96rem;
}

.sidebar-user span {
  display: block;
  margin-top: 0.15rem;
  color: var(--muted);
  font-size: 0.84rem;
}

.nav-drawer {
  display: none;
  padding-top: 0.9rem;
}

.nav-drawer.open {
  display: grid;
  gap: 1rem;
}

.nav-group {
  display: grid;
  gap: 0.35rem;
}

.nav-section {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0 0.35rem 0.25rem;
}

.nav-link {
  display: block;
  padding: 0.8rem 0.95rem;
  border-radius: 14px;
  font-size: 0.95rem;
  font-weight: 600;
  color: #23405f;
}

.nav-link:hover {
  background: rgba(21, 101, 192, 0.08);
}

.nav-link.primary {
  background: linear-gradient(135deg, rgba(21, 101, 192, 0.12), rgba(41, 182, 246, 0.08));
  color: var(--primary);
}

.logout-form {
  margin: 0;
}

.logout-btn {
  width: 100%;
  justify-content: center;
  background: #fff;
  color: var(--text);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}

.content {
  width: min(var(--container), 100%);
  margin: 0 auto;
  padding: 1.1rem 1rem 2rem;
}

.page-head {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.2rem;
}

.page-head h1 {
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  letter-spacing: -0.03em;
}

.page-head p {
  max-width: 56ch;
  color: var(--muted);
}

.page-head-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.eyebrow {
  margin-bottom: 0.35rem;
  color: var(--primary);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.panel, .card, .auth-card, .stat {
  background: var(--card);
  border: 1px solid rgba(216, 230, 247, 0.95);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}

.panel, .auth-card {
  padding: 1.2rem;
}

.card {
  padding: 1.15rem;
}

.panel > h2,
.panel-head h2 {
  font-size: 1.03rem;
  letter-spacing: -0.02em;
}

.panel > h2 + *,
.panel-head + *,
.panel > p + * {
  margin-top: 1rem;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.panel-head p {
  color: var(--muted);
  font-size: 0.9rem;
}

.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

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

.stack {
  display: grid;
  gap: 1rem;
}

.form-grid {
  display: grid;
  gap: 0.95rem;
  grid-template-columns: 1fr;
}

.form-grid .full {
  grid-column: 1 / -1;
}

label:not(.checkbox) {
  display: grid;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

label:not(.checkbox) input,
label:not(.checkbox) select,
label:not(.checkbox) textarea {
  font-size: 0.96rem;
  font-weight: 500;
  color: var(--text);
  letter-spacing: 0;
  text-transform: none;
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-height: 48px;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 600;
}

.checkbox input {
  width: 1.1rem;
  height: 1.1rem;
  flex-shrink: 0;
  padding: 0;
}

.compact-form {
  display: grid;
  gap: 0.9rem;
}

.compact-form button {
  width: 100%;
}

.task-card,
.list-row {
  display: grid;
  gap: 0.32rem;
  padding: 1rem;
  margin: 0;
  border: 1px solid rgba(216, 230, 247, 0.95);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(227, 242, 253, 0.58), rgba(255, 255, 255, 0.96));
}

.task-card + .task-card,
.list-row + .list-row,
.admin-item + .admin-item {
  margin-top: 0.8rem;
}

.task-card strong,
.list-row strong {
  font-size: 0.98rem;
}

.task-card small,
.list-row small,
.list-row span,
.list-row p {
  color: var(--muted);
}

.task-card.danger {
  border-color: rgba(198, 40, 40, 0.18);
  box-shadow: inset 4px 0 0 var(--danger);
}

.chip {
  width: fit-content;
  display: inline-flex;
  align-items: center;
  padding: 0.28rem 0.55rem;
  border-radius: 999px;
  background: rgba(21, 101, 192, 0.12);
  color: var(--primary);
  font-size: 0.72rem;
  font-weight: 800;
}

.stats,
.admin-links {
  display: grid;
  gap: 0.85rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-bottom: 1rem;
}

.stat {
  padding: 1rem;
}

.stat span {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  margin-bottom: 0.3rem;
}

.stat strong {
  display: block;
  font-size: clamp(1.35rem, 4vw, 1.9rem);
  line-height: 1.1;
}

.quick-link {
  display: flex;
  align-items: center;
  min-height: 88px;
  font-size: 1rem;
  font-weight: 800;
}

.admin-item {
  display: grid;
  gap: 0.9rem;
  padding: 1rem;
  border: 1px solid rgba(216, 230, 247, 0.95);
  border-radius: var(--radius-lg);
  background: rgba(247, 251, 255, 0.9);
}

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

.holiday-row {
  grid-template-columns: 1fr;
}

.holiday-layout {
  align-items: start;
}

.holiday-stats {
  margin-bottom: 1rem;
}

.holiday-form .form-grid button {
  width: 100%;
}

.holiday-panel {
  min-height: 100%;
}

.holiday-list {
  display: grid;
  gap: 0.85rem;
}

.holiday-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
  align-items: center;
  padding: 1rem;
  border: 1px solid rgba(216, 230, 247, 0.95);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(227, 242, 253, 0.45), rgba(255, 255, 255, 0.98));
}

.holiday-date {
  width: fit-content;
  min-width: 92px;
  display: grid;
  gap: 0.08rem;
  padding: 0.8rem 0.9rem;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(21, 101, 192, 0.14), rgba(41, 182, 246, 0.12));
  color: var(--primary);
  text-align: left;
}

.holiday-date strong {
  font-size: 1.35rem;
  line-height: 1;
}

.holiday-date span {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.holiday-copy {
  display: grid;
  gap: 0.18rem;
}

.holiday-copy strong {
  font-size: 1rem;
}

.holiday-copy span {
  color: var(--muted);
  font-size: 0.9rem;
}

.holiday-delete {
  width: 100%;
}

.weekday-grid {
  display: grid;
  gap: 0.65rem;
  grid-template-columns: 1fr 1fr;
}

.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: 18px;
  border: 1px solid rgba(216, 230, 247, 0.95);
}

table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  background: rgba(255, 255, 255, 0.8);
}

th, td {
  padding: 0.9rem 0.85rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  font-size: 0.92rem;
}

th {
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  background: rgba(240, 247, 255, 0.9);
}

.alert {
  margin: 0.9rem 0;
  padding: 0.85rem 1rem;
  border-radius: 14px;
  background: rgba(198, 40, 40, 0.08);
  color: var(--danger);
  font-size: 0.92rem;
}

.alert-success {
  background: rgba(46, 125, 50, 0.10);
  color: var(--success);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 46px;
  padding: 0.8rem 1.15rem;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  font-size: 0.95rem;
  font-weight: 800;
  box-shadow: var(--shadow-soft);
}

.danger-button {
  background: var(--danger);
}

.landing {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.2rem;
}

.hero,
.auth-card {
  width: min(720px, 100%);
}

.login-shell {
  width: min(1080px, 100%);
  display: grid;
  gap: 1rem;
}

.login-hero {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 1rem;
  padding: 1.4rem;
  border-radius: 28px;
  color: #fff;
  background:
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.18), transparent 11rem),
    linear-gradient(145deg, #0d4ea6, #1d74df 58%, #39b7f6);
  box-shadow: 0 28px 70px rgba(21, 101, 192, 0.22);
}

.login-hero::after {
  content: "";
  position: absolute;
  right: -2rem;
  bottom: -2rem;
  width: 10rem;
  height: 10rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
}

.login-badge {
  width: fit-content;
  padding: 0.38rem 0.72rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.16);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.login-hero h1 {
  max-width: 10ch;
  font-size: clamp(2.2rem, 8vw, 4rem);
  letter-spacing: -0.05em;
}

.login-copy {
  max-width: 36rem;
  color: rgba(255, 255, 255, 0.9);
  font-size: 1rem;
}

.login-points {
  display: grid;
  gap: 0.8rem;
}

.login-point {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 0.18rem;
  padding: 0.95rem 1rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.login-point strong {
  font-size: 0.96rem;
}

.login-point span {
  color: rgba(255, 255, 255, 0.84);
  font-size: 0.9rem;
}

.login-card {
  width: 100%;
  max-width: none;
  padding: 1.4rem;
}

.login-card-head {
  display: grid;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.login-card-head h2 {
  font-size: 1.6rem;
  letter-spacing: -0.03em;
}

.login-card-head p:last-child {
  color: var(--muted);
}

.login-form button {
  width: 100%;
  min-height: 50px;
}

.login-divider {
  position: relative;
  margin: 1.1rem 0;
  text-align: center;
}

.login-divider::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  border-top: 1px solid var(--line);
}

.login-divider span {
  position: relative;
  z-index: 1;
  display: inline-block;
  padding: 0 0.7rem;
  background: rgba(255, 255, 255, 0.94);
  color: var(--muted);
  font-size: 0.85rem;
}

.forgot-form {
  margin-top: 0.2rem;
}

.login-help {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
}

.hero {
  display: grid;
  gap: 1.1rem;
}

.hero > p,
.hint,
.empty,
small {
  color: var(--muted);
}

.cards {
  margin-top: 0.4rem;
}

.cards .card h2 {
  margin-bottom: 0.35rem;
}

code {
  padding: 0.18rem 0.4rem;
  border-radius: 8px;
  background: rgba(21, 101, 192, 0.08);
  font-size: 0.9em;
}

@media (min-width: 640px) {
  .content {
    padding: 1.5rem 1.25rem 2.5rem;
  }

  .page-head {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
  }

  .compact-form {
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    align-items: end;
  }

  .compact-form button {
    width: auto;
  }

  .grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }

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

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

  .stats,
  .admin-links {
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  }

  .login-shell {
    gap: 1.25rem;
  }

  .login-hero,
  .login-card {
    padding: 1.8rem;
  }

  .holiday-row {
    grid-template-columns: auto 1fr auto;
    align-items: center;
  }

  .holiday-item {
    grid-template-columns: auto minmax(0, 1fr) auto;
  }

  .holiday-delete,
  .holiday-form .form-grid button {
    width: auto;
  }

  .weekday-grid {
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  }
}

@media (min-width: 980px) {
  .shell {
    grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  }

  .sidebar {
    height: 100vh;
    padding: 1.25rem;
    border-right: 1px solid rgba(216, 230, 247, 0.9);
    border-bottom: 0;
  }

  .sidebar-inner {
    height: 100%;
    display: grid;
    grid-template-rows: auto auto 1fr;
    width: 100%;
    margin: 0;
  }

  .sidebar-top {
    align-items: flex-start;
  }

  .nav-toggle {
    display: none;
  }

  .nav-drawer {
    display: grid;
    gap: 1rem;
    padding-top: 1rem;
    align-content: start;
  }

  .logout-form {
    margin-top: auto;
  }

  .content {
    max-width: none;
    padding: 2rem 2rem 3rem;
  }

  .form-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }

  .login-shell {
    grid-template-columns: minmax(0, 1.1fr) minmax(360px, 440px);
    align-items: stretch;
  }

  .login-hero,
  .login-card {
    min-height: 640px;
  }

  .login-hero {
    align-content: space-between;
    padding: 2.25rem;
  }

  .login-card {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
}