/* =========================================================================
   DFMS Faculty Check-In — USAFA-branded theme
   Palette references USAFA brand guide: blue, silver, gold, red.
   ========================================================================= */

@import url("https://fonts.googleapis.com/css2?family=Oswald:wght@500;600;700&family=Source+Sans+3:wght@400;600;700&display=swap");

:root {
  /* USAFA brand palette */
  --usafa-blue:        #004F98;   /* PMS 287 C — primary */
  --usafa-blue-dark:   #003087;   /* deeper navy — hover/header */
  --usafa-blue-darker: #001F5C;   /* footer / deep chrome */
  --silver:            #8A8D8F;   /* PMS 877 */
  --silver-light:      #C8CBCD;
  --silver-pale:       #E9ECEE;
  --silver-mist:       #F3F5F7;
  --gold:              #FFC72C;   /* class color / accent */
  --gold-dark:         #D4A017;
  --usafa-red:         #A6282D;   /* class color / negative */
  --usafa-red-dark:    #7F1E22;

  /* Semantic tokens (mapped to palette) */
  --bg:            var(--silver-mist);
  --surface:       #ffffff;
  --border:        var(--silver-light);
  --border-strong: var(--silver);
  --text:          #1D232B;
  --muted:         #5C6370;
  --primary:       var(--usafa-blue);
  --primary-hover: var(--usafa-blue-dark);
  --accent:        var(--gold);
  --accent-dark:   var(--gold-dark);
  --success:       #1E7D45;
  --success-bg:    #E5F4EC;
  --error:         var(--usafa-red);
  --error-bg:      #FBEAEA;

  /* Check-in statuses */
  --available:     #1E7D45;
  --unavailable:   var(--usafa-red);
  --onleave:       var(--gold-dark);

  /* Typography */
  --font-display:  "Oswald", "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
  --font-body:     "Source Sans 3", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --shadow:        0 1px 3px rgba(0, 31, 92, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-lg:     0 10px 30px rgba(0, 31, 92, 0.18), 0 2px 8px rgba(0, 0, 0, 0.06);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.5;
}

h1, h2, h3 {
  line-height: 1.2;
  margin: 0 0 0.5em;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
h1 { font-size: 1.6rem; }
h2 { font-size: 1.3rem; }
h3 { font-size: 1.05rem; letter-spacing: 0.04em; }

a { color: var(--primary); }
a:hover { color: var(--primary-hover); }

.muted { color: var(--muted); font-size: 0.9rem; }
.error { color: var(--error); }
.subtitle {
  color: var(--muted);
  margin-top: -0.25em;
  font-family: var(--font-body);
  text-transform: none;
  letter-spacing: normal;
}

/* ---------- buttons ---------- */
button {
  font: inherit;
  font-family: var(--font-body);
  font-weight: 600;
  cursor: pointer;
  padding: 0.6rem 1.1rem;
  border-radius: 4px;
  border: 1px solid var(--primary);
  background: var(--primary);
  color: white;
  letter-spacing: 0.02em;
  transition: background 0.12s ease, border-color 0.12s ease, box-shadow 0.12s ease, transform 0.05s ease;
}
button:hover:not(:disabled) {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
}
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
button:active:not(:disabled) { transform: translateY(1px); }
button:disabled { opacity: 0.55; cursor: not-allowed; }

.btn-secondary {
  background: white;
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--silver-pale);
  border-color: var(--silver);
}

/* ---------- form fields ---------- */
label {
  display: block;
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin: 0.85rem 0 0.3rem;
}
input[type="email"],
input[type="password"],
input[type="text"],
textarea {
  width: 100%;
  padding: 0.6rem 0.75rem;
  font: inherit;
  font-family: var(--font-body);
  border: 1px solid var(--border);
  border-radius: 4px;
  background: white;
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}
input:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 79, 152, 0.18);
}
textarea { resize: vertical; }

/* ---------- login (index.html) ---------- */
.auth-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    linear-gradient(180deg, var(--usafa-blue-darker) 0%, var(--usafa-blue) 55%, var(--silver-mist) 55%, var(--silver-mist) 100%);
}
.auth-page .brand-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 1.1rem 1rem 0.4rem;
  color: white;
  text-align: center;
}
.auth-page .brand-bar .brand-wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.9rem;
  color: var(--gold);
}
.auth-page .brand-rule {
  height: 3px;
  width: min(560px, 90%);
  margin: 0 auto 5.5rem;
  background: linear-gradient(90deg, transparent 0%, var(--gold) 20%, var(--gold) 80%, transparent 100%);
  border: none;
  border-radius: 2px;
}
.auth-page main.card {
  margin: 0 auto;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 4px solid var(--usafa-blue);
  border-radius: 6px;
  padding: 2rem 1.75rem 1.75rem;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
  text-align: center;
  position: relative;
}
.card .seal {
  display: block;
  width: 120px;
  height: 120px;
  margin: -90px auto 0.75rem;
  background: white;
  border-radius: 50%;
  padding: 8px;
  box-shadow: 0 4px 14px rgba(0, 31, 92, 0.25), 0 0 0 1px var(--silver-light);
  object-fit: contain;
}
/* Graceful fallback when the seal image is missing */
.card .seal:not([src]),
.card .seal[src=""] { display: none; }

.card h1 { margin-top: 0.25rem; color: var(--usafa-blue-dark); }
.card .subtitle { margin-bottom: 1rem; }

.card form { text-align: left; }
.card button[type="submit"] { width: 100%; margin-top: 1.25rem; }

.card .muted {
  text-align: center;
  margin-top: 1rem;
}

.auth-footer {
  margin-top: auto;
  padding: 1.25rem 1rem;
  text-align: center;
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

/* ---------- app shell ---------- */
.app-header {
  background: linear-gradient(180deg, var(--usafa-blue-dark) 0%, var(--usafa-blue) 100%);
  color: white;
  border-bottom: 3px solid var(--gold);
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 2px 8px rgba(0, 31, 92, 0.25);
}
.app-header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.app-header .brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}
.app-header .brand-seal {
  width: 44px;
  height: 44px;
  padding: 3px;
  border-radius: 50%;
  background: white;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.6);
  flex-shrink: 0;
}
.app-header .brand-seal:not([src]),
.app-header .brand-seal[src=""] { display: none; }
.app-header .brand-text { min-width: 0; }
.app-header h1 {
  margin: 0;
  font-size: 1.1rem;
  color: white;
  letter-spacing: 0.06em;
  line-height: 1.1;
}
.app-header .brand-sub {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--gold);
  display: block;
  line-height: 1;
  margin-top: 2px;
}
.header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.header-right #who {
  color: rgba(255, 255, 255, 0.92);
  font-size: 0.88rem;
}
.app-header .btn-secondary {
  background: transparent;
  color: white;
  border-color: rgba(255, 255, 255, 0.55);
}
.app-header .btn-secondary:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.12);
  border-color: white;
}

.tabs {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  gap: 0.25rem;
}
.tab {
  background: transparent;
  border: none;
  color: rgba(255, 255, 255, 0.78);
  padding: 0.75rem 1.1rem;
  border-bottom: 3px solid transparent;
  border-radius: 0;
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.92rem;
}
.tab:hover {
  background: rgba(255, 255, 255, 0.08);
  color: white;
}
.tab.active {
  color: white;
  border-bottom-color: var(--gold);
  background: transparent;
}
.tab:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: -2px;
}

.app-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

.tab-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 3px solid var(--usafa-blue);
  border-radius: 6px;
  padding: 1.75rem;
  box-shadow: var(--shadow);
}
.tab-panel h2 { color: var(--usafa-blue-dark); }
.tab-panel h3 { color: var(--usafa-blue-dark); }

.sub-card {
  border-top: 1px solid var(--border);
  padding-top: 1.25rem;
  margin-top: 1.5rem;
}
.sub-card:first-of-type { border-top: none; padding-top: 0; margin-top: 0; }

/* ---------- check-in buttons ---------- */
.status-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 0.75rem;
  margin: 1rem 0 1.25rem;
}
.status-btn {
  padding: 1.1rem 1rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: white;
  border: none;
  border-radius: 4px;
  box-shadow: inset 0 -3px 0 rgba(0, 0, 0, 0.18);
}
.status-available   { background: var(--available); }
.status-available:hover:not(:disabled)   { background: #175F34; }
.status-unavailable { background: var(--unavailable); }
.status-unavailable:hover:not(:disabled) { background: var(--usafa-red-dark); }
.status-onleave     { background: var(--onleave); color: #1D232B; }
.status-onleave:hover:not(:disabled)     { background: #B0830A; color: white; }

.status-message {
  margin: 0.75rem 0;
  min-height: 1.25em;
  font-size: 0.95rem;
}
.status-message.success {
  color: var(--success);
  background: var(--success-bg);
  border-left: 3px solid var(--success);
  padding: 0.55rem 0.75rem;
  border-radius: 3px;
}
.status-message.error {
  color: var(--error);
  background: var(--error-bg);
  border-left: 3px solid var(--error);
  padding: 0.55rem 0.75rem;
  border-radius: 3px;
}

/* ---------- tables ---------- */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 4px;
}
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0;
}
th, td {
  text-align: left;
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  font-size: 0.95rem;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:nth-child(even) { background: var(--silver-mist); }
tbody tr:hover { background: rgba(0, 79, 152, 0.06); }

th {
  font-family: var(--font-display);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: white;
  background: var(--usafa-blue-dark);
  border-bottom: 2px solid var(--gold);
  position: sticky;
  top: 0;
  font-weight: 600;
}
th[data-sort] { cursor: pointer; user-select: none; }
th[data-sort]:hover { background: var(--usafa-blue-darker); }
.sort-indicator { font-size: 0.75rem; color: var(--gold); margin-left: 0.25rem; }

/* ---------- status pills ---------- */
.pill {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: white;
  white-space: nowrap;
}
.pill-available   { background: var(--available); }
.pill-unavailable { background: var(--unavailable); }
.pill-onleave     { background: var(--onleave); color: #1D232B; }

/* ---------- roster header ---------- */
.roster-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.roster-header h2 { margin-bottom: 0; }
.roster-actions { display: flex; gap: 0.5rem; }

/* ---------- modal ---------- */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 31, 92, 0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 100;
}
.modal[hidden] { display: none; }
.modal-card {
  background: var(--surface);
  border-top: 4px solid var(--usafa-blue);
  border-radius: 6px;
  padding: 1.75rem;
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow-lg);
}
.modal-card h2 { color: var(--usafa-blue-dark); }
.modal-card button { width: 100%; margin-top: 1rem; }

/* ---------- app footer ---------- */
.app-footer {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem;
  text-align: center;
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.app-footer .sep { color: var(--silver); margin: 0 0.5rem; }

/* ---------- responsive tweaks ---------- */
@media (max-width: 600px) {
  .tab-panel { padding: 1.15rem; }
  .app-header-inner { padding: 0.6rem 0.75rem; }
  .tabs { padding: 0 0.5rem; }
  .tab { padding: 0.6rem 0.75rem; font-size: 0.85rem; }
  th, td { padding: 0.5rem 0.45rem; font-size: 0.9rem; }
  .app-header h1 { font-size: 0.98rem; }
  .app-header .brand-sub { font-size: 0.64rem; letter-spacing: 0.18em; }
  .app-header .brand-seal { width: 38px; height: 38px; }
  .card .seal { width: 96px; height: 96px; margin-top: -70px; }
}