/* Theme: Coaching Management App (Android/Windows-friendly)
   Scope: Global styles shared across all roles/pages
*/
html {
  /* Material 3 inspired color roles (dark default) */
  --bg: #0b1220;
  --surface: #0f172a;
  --card: #101826;
  --muted: #94a3b8;
  --text: #e6eaf2;
  --primary: #6750A4; /* M3 Primary */
  --primary-600: #5b4795;
  --accent: #03DAC6; /* M3 Secondary/Accent */
  --danger: #ef4444;
  --success: #22c55e;
  --warning: #f59e0b;
  --border: #223148;
  --shadow: 0 14px 34px rgba(0,0,0,.38);
  --header-h: 64px; /* fallback header height for mobile offset */
}

/* Light theme overrides */
[data-theme="light"] {
  --bg: #f7f9fc;
  --surface: #ffffff;
  --card: #ffffff;
  --muted: #5b6b82;
  --text: #0b1220;
  --primary: #6750A4;
  --primary-600: #5b4795;
  --accent: #0bb3a7;
  --danger: #dc2626;
  --success: #16a34a;
  --warning: #d97706;
  --border: #d5deea;
  --shadow: 0 14px 34px rgba(0,0,0,.08);
}

* { box-sizing: border-box; }
html, body { height: 100%; overflow-x: hidden; }
body {
  margin: 0;
  font-family: Inter, Segoe UI, Roboto, system-ui, -apple-system, Arial, sans-serif;
  background: linear-gradient(180deg, var(--bg), var(--surface) 60%);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Suggest box */
.suggest-box { background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow); }
.suggest-box ul{ margin:0; padding:4px; }
.suggest-box li{ list-style:none; color: var(--text); }
.suggest-box li:hover{ background: rgba(103,80,164,0.14); }
[data-theme="light"] .suggest-box li:hover{ background: rgba(103,80,164,0.12); }

.container {
  max-width: 1050px;
  margin: 24px auto;
  padding: 0 16px;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 100; /* above sidebar */
  backdrop-filter: saturate(180%) blur(10px);
  background: rgba(17, 24, 39, 0.75);
  border-bottom: 1px solid var(--border);
}
[data-theme="light"] .app-header { background: rgba(255,255,255,0.8); }
.app-header .inner {
  display: grid;
  grid-template-columns: 48px minmax(0,1fr) auto;
  align-items: center;
  gap: 12px;
  max-width: 1050px;
  margin: 0 auto;
  padding: 10px 16px;
}
.menu-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 10px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, #0f172a, #0b1220);
  color: var(--text);
}
.menu-btn:hover { border-color: #35507a; }
[data-theme="light"] .menu-btn {
  background: linear-gradient(180deg, var(--surface), #f1f5f9);
  border-color: #cbd5e1;
  color: var(--text);
}
[data-theme="light"] .menu-btn:hover { border-color: #94a3b8; }
.app-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  letter-spacing: 0.2px;
  color: var(--text);
  opacity: 0.95;
  min-width: 0;
}
.app-title .app-logo {
  height: 40px;
  width: 40px;
  object-fit: cover;
  border-radius: 10px;
  vertical-align: middle;
  margin-right: 10px;
}
.app-title-text {
  display: block;
  min-width: 0;
  max-width: 100%;
  white-space: normal;
  word-break: break-word;
}
.app-actions a, .app-actions button {
  padding: 8px 12px; border-radius: 10px; border: 1px solid var(--border);
  background: linear-gradient(180deg, #0f172a, #0b1220);
  color: var(--text);
}

.layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 20px;
  max-width: 1050px;
  margin: 18px auto;
  padding: 0 16px;
}
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    top: var(--header-h);
    bottom: 0;
    left: 0;
    width: 78%; /* wider for tap targets */
    max-width: 340px;
    transform: translateX(-100%);
    overflow: auto;
    -webkit-overflow-scrolling: touch;
    z-index: 99;
    padding-top: 6px; /* ensure first item fully visible */
  }
  .sidebar.open { transform: translateX(0); }
}

.sidebar {
  outline: none;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, #0f172a, #0c1526);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 14px;
  height: fit-content;
}
[data-theme="light"] .sidebar { background: linear-gradient(180deg, #ffffff, #f8fafc); }
.sidebar .group { margin-bottom: 10px; color: var(--muted); font-size: 13px; text-transform: uppercase; }
.sidebar a {
  display: block; padding: 10px 12px; border-radius: 10px; color: var(--text);
}
.sidebar a:hover { background: rgba(103,80,164,0.14); }
.sidebar a.active { background: rgba(103,80,164,0.22); border: 1px solid #334155; }

.card {
  background: linear-gradient(180deg, #101826, #0d1524);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 18px;
  overflow: hidden;
}
[data-theme="light"] .card { background: linear-gradient(180deg, #ffffff, #f8fafc); }
.card h2 { margin: 0 0 10px; font-size: 18px; }

.grid { display: grid; gap: 16px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1024px) {
  .grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 860px) {
  .grid.cols-2, .grid.cols-3 { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .grid.cols-4 { grid-template-columns: 1fr; }
}

.input, select, textarea {
  width: 100%;
  background: #0b1322;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  padding: 10px 12px;
}
[data-theme="light"] .input, [data-theme="light"] select, [data-theme="light"] textarea { background: #ffffff; }
.label { display: block; margin-bottom: 6px; color: var(--muted); font-size: 13px; }

.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 14px; border-radius: 12px; border: 1px solid var(--border);
  background: linear-gradient(180deg, var(--primary), var(--primary-600));
  color: white; font-weight: 600;
}
.button.secondary { background: linear-gradient(180deg, var(--surface), var(--card)); color: var(--text); }
.button.danger { background: linear-gradient(180deg, #dc2626, #b91c1c); }

.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: 10px 12px; border-bottom: 1px solid #1e2a3c; word-break: break-word; }
.table th { text-align: left; color: var(--muted); font-weight: 600; font-size: 13px; }
.table-responsive { width: 100%; overflow-x: auto; }

/* Responsive visibility helpers */
@media (max-width: 560px) {
  .hide-sm { display: none; }
}

.kpi {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px; border-radius: 14px; border: 1px solid var(--border);
  background: linear-gradient(180deg, #0f172a, #0c1526);
}
[data-theme="light"] [data-force-light].kpi { background: linear-gradient(180deg, #ffffff, #f8fafc) !important; }
.kpi .value { font-size: 22px; font-weight: 700; }
.kpi .label { font-size: 12px; color: var(--muted); }
[data-theme="light"] .kpi { background: linear-gradient(180deg, #ffffff, #f8fafc) !important; border-color: var(--border); color: var(--text); }

.centered {
  max-width: 520px; margin: 40px auto; padding: 0 16px;
}
.center-card { padding: 20px; }
.form-row { display: grid; gap: 12px; grid-template-columns: 1fr; }
@media (min-width: 620px) { .form-row { grid-template-columns: 1fr 1fr; } }

.notice { padding: 10px 12px; border: 1px dashed #314460; border-radius: 12px; color: var(--muted); font-size: 13px; }

/* Form micro-controls: better cross-platform sizing (Windows + Mobile) */
input[type=number] { -moz-appearance: textfield; font-variant-numeric: tabular-nums; }
input[type=number]::-webkit-outer-spin-button,
input[type=number]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }

.time-group { display:flex; gap:6px; align-items:center; flex-wrap:wrap; white-space:normal; overflow-x:hidden; width:100%; }
.time-break { display: block; flex-basis: 100%; width:100%; height:0; }
.time-group .input.time-hh, .time-group .input.time-mm { max-width:64px; text-align:center; width:auto; flex:0 0 auto; padding:8px 10px; height:40px; font-size:14px; }
.time-group .input.time-ampm { min-width:80px; width:auto; flex:0 0 auto; padding:8px 10px; height:40px; font-size:14px; }
.time-sep { opacity:.7; }

.days-grid { display:grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap:6px; }
@media (max-width: 768px) {
  .time-group { gap:6px; }
  .time-group .input.time-hh, .time-group .input.time-mm { max-width:60px; height:38px; padding:6px 8px; font-size:14px; }
  .time-group .input.time-ampm { min-width:76px; height:38px; padding:6px 8px; font-size:14px; }
  .time-sep { min-width:12px; text-align:center; }
  .days-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
}

/* Responsive header actions for lists (e.g., Students, Staffs) */
.card .header-actions { display:flex; gap:8px; flex-wrap:wrap; align-items:center; }
@media (max-width: 560px) {
  .card .title-bar { display:flex; flex-direction:column; align-items:flex-start; gap:8px; }
  .card .header-actions { width:100%; display:grid; grid-template-columns: 1fr 1fr; gap:8px; }
  .card .header-actions .button { width:100%; justify-content:center; }
}