/* Metocore design system
   Signature: deep-navy curved header band (echoes the reference UI kit),
   card-based layout, pill buttons, tinted status badges. */

:root {
  --color-navy: #003272;
  --color-navy-dark: #001f47;
  --color-blue: #0065b3;
  --color-cyan: #009cd5;
  --color-green: #134c00;
  --color-green-light: #4d9822;
  --color-amber: #b45309;
  --color-amber-bg: #fef3e2;
  --color-red: #b91c1c;
  --color-red-bg: #fdecec;
  --color-green-bg: #eaf3e3;

  --ink: #0f172a;
  --ink-muted: #475569;
  --ink-faint: #94a3b8;
  --border: #e2e8f0;
  --surface: #ffffff;
  --page-bg: #f6f8fb;

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-pill: 999px;
  --shadow-card: 0 4px 20px rgba(0, 50, 114, 0.08);
  --shadow-card-hover: 0 8px 28px rgba(0, 50, 114, 0.12);

  --font-display: "Manrope", "Segoe UI", system-ui, sans-serif;
  --font-body: "Inter", "Segoe UI", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--page-bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 0.5em;
  color: var(--ink);
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.05rem; }

a {
  color: var(--color-blue);
}

.link-button {
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  font: inherit;
  color: var(--color-blue);
  cursor: pointer;
  text-decoration: none;
}

.link-button:hover {
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--color-cyan);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* Layout shell */

.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-header {
  background: var(--color-navy);
  color: #fff;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.app-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  color: #fff;
  text-decoration: none;
}

.app-header__logo-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: #fff;
  border-radius: 9px;
  flex-shrink: 0;
}

.app-header__logo-chip img {
  width: 20px;
  height: 20px;
  object-fit: contain;
}

.hero-band__logo {
  width: 56px;
  height: 56px;
  background: #fff;
  border-radius: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.hero-band__logo img {
  width: 34px;
  height: 34px;
  object-fit: contain;
}

.app-header__nav {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  align-items: center;
}

.app-header__nav a,
.app-header__nav .link-button {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
}

.app-header__nav a:hover,
.app-header__nav .link-button:hover {
  color: #fff;
}

.app-main {
  flex: 1;
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

/* Signature: curved navy header band, used on auth/check-in screens */

.hero-band {
  background: var(--color-navy);
  color: #fff;
  border-radius: 0 0 32px 32px;
  padding: 2.25rem 1.5rem 2.75rem;
  text-align: center;
}

.hero-band h1 {
  color: #fff;
  margin-bottom: 0.25rem;
}

.hero-band p {
  color: rgba(255, 255, 255, 0.8);
  margin: 0;
}

/* Cards */

.card {
  background: var(--surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 1.5rem;
}

.card + .card {
  margin-top: 1rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-pill);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.08s ease, box-shadow 0.08s ease;
}

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

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

.btn-primary:hover {
  background: var(--color-navy-dark);
}

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

.btn-danger {
  background: var(--color-red-bg);
  color: var(--color-red);
}

.btn-block {
  display: flex;
  width: 100%;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Forms */

.field {
  margin-bottom: 1rem;
}

.field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-muted);
  margin-bottom: 0.35rem;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  background: var(--surface);
  color: var(--ink);
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: 2px solid var(--color-cyan);
  outline-offset: 1px;
  border-color: var(--color-cyan);
}

/* Status badges */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 600;
}

.badge-success { background: var(--color-green-bg); color: var(--color-green); }
.badge-warning { background: var(--color-amber-bg); color: var(--color-amber); }
.badge-danger  { background: var(--color-red-bg); color: var(--color-red); }
.badge-neutral { background: var(--border); color: var(--ink-muted); }

/* Data table */

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  background: var(--surface);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th, td {
  text-align: left;
  padding: 0.85rem 1.1rem;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

th {
  font-family: var(--font-display);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
  background: var(--page-bg);
}

tr:last-child td {
  border-bottom: none;
}

/* Messages */

.messages {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.messages li {
  background: var(--color-green-bg);
  color: var(--color-green);
  padding: 0.7rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

/* Empty state */

.empty-state {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--ink-muted);
}

/* Utility */

.stack { display: flex; flex-direction: column; gap: 0.75rem; }
.row { display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.muted { color: var(--ink-muted); }
.text-center { text-align: center; }

/* Bottom nav (teacher check-in, announcements, events) */

.bottom-nav {
  display: flex;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 30;
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 0.5rem 0.5rem calc(0.5rem + env(safe-area-inset-bottom, 0px));
  justify-content: center;
  gap: 0.35rem;
  box-shadow: 0 -6px 20px rgba(0, 50, 114, 0.08);
}

.bottom-nav a {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  min-width: 76px;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-md);
  color: var(--ink-muted);
  text-decoration: none;
  font-size: 0.72rem;
  font-weight: 600;
  transition: background 0.15s ease, color 0.15s ease;
}

.bottom-nav a svg {
  width: 20px;
  height: 20px;
}

.bottom-nav a:hover {
  color: var(--color-navy);
}

.bottom-nav a.active {
  color: var(--color-navy);
  background: rgba(0, 50, 114, 0.08);
}

body:has(.bottom-nav) .app-main {
  padding-bottom: 6rem;
}

@media (max-width: 640px) {
  .app-main {
    padding: 1.25rem 1rem;
  }
}