/* assets/css/style.css */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --color-primary: #0D9488;
  --color-primary-dark: #0F6E56;
  --color-on-primary: #FFFFFF;
  --color-secondary: #14B8A6;
  --color-coral: #D85A30;
  --color-coral-dark: #993C1D;
  --color-amber: #EF9F27;
  --color-amber-dark: #854F0B;
  --color-bg: #F0FDFA;
  --color-fg: #134E4A;
  --color-muted: #5f8a84;
  --color-card: #FFFFFF;
  --color-border: #99F6E4;
  --color-danger: #DC2626;
  --avatar-0: #0D9488;
  --avatar-1: #D85A30;
  --avatar-2: #99a8a5;
  --avatar-3: #EF9F27;
  --radius-card: 14px;
  --radius-control: 12px;
  --dur: 300ms;
}

@media (prefers-reduced-motion: reduce) {
  :root { --dur: 0ms; }
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

* { box-sizing: border-box; }
body { margin: 0; font-family: 'Inter', system-ui, sans-serif; background: var(--color-bg); color: var(--color-fg); }
h1, h2, h3 { font-weight: 600; }
.page-title { font-size: 20px; margin: 4px 0 16px; }
.section-heading { font-size: 15px; font-weight: 600; margin: 20px 0 8px; color: var(--color-fg); }
.empty-hint { color: var(--color-muted); font-size: 14px; }

.app-header { display: flex; justify-content: space-between; align-items: center; padding: 14px 16px; background: var(--color-primary); color: #fff; }
.app-header .brand { font-weight: 600; font-size: 16px; }
.logout-link { color: #fff; text-decoration: none; font-size: 13px; font-weight: 500; opacity: 0.9; }

.app-main { padding: 16px; max-width: 480px; margin: 0 auto; padding-bottom: 32px; }
body:has(.app-nav--bottom) .app-main { padding-bottom: 84px; }

.flash { padding: 12px 14px; border-radius: var(--radius-control); margin-bottom: 12px; font-size: 14px; }
.flash-error { background: #FAECE7; color: var(--color-coral-dark); }
.flash-success { background: #E1F5EE; color: var(--color-primary-dark); }

.form-card { display: flex; flex-direction: column; gap: 12px; background: var(--color-card); padding: 16px; border-radius: var(--radius-card); margin-bottom: 12px; }
.form-card label { display: flex; flex-direction: column; gap: 4px; font-size: 14px; color: var(--color-fg); }
.form-card input, .form-card select { padding: 10px 12px; font-size: 15px; border: 1px solid #d8ede9; border-radius: var(--radius-control); background: var(--color-bg); color: var(--color-fg); }
.form-card button { padding: 12px; font-size: 15px; font-weight: 600; background: var(--color-primary); color: #fff; border: none; border-radius: var(--radius-control); transition: transform 150ms; }
.form-card button:active { transform: scale(0.97); }
.form-card fieldset { border: 1px solid #d8ede9; border-radius: var(--radius-control); padding: 10px 12px; }
.form-card legend { font-size: 12px; color: var(--color-muted); padding: 0 4px; }
.form-card fieldset { display: flex; flex-wrap: wrap; gap: 8px 16px; }
.inline { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; }
.class-select-card { margin-bottom: 10px; }

.list { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 8px; margin: 0 0 16px; }
.list li { background: var(--color-card); padding: 12px 14px; border-radius: var(--radius-card); font-size: 14px; display: flex; align-items: center; flex-wrap: wrap; gap: 8px; }
.list a { color: var(--color-primary); text-decoration: none; font-weight: 600; }
.btn-toggle { margin-left: auto; padding: 6px 12px; font-size: 12px; font-weight: 600; background: var(--color-bg); color: var(--color-primary-dark); border: 1px solid var(--color-border); border-radius: 8px; }
.btn-toggle:active { transform: scale(0.96); }

/* ---- auth: name picker + pin pad ---- */
.auth-title { font-size: 20px; font-weight: 600; margin: 8px 0 2px; text-align: center; }
.auth-subtitle { font-size: 13px; color: var(--color-muted); margin: 0 0 20px; text-align: center; }
.avatar { width: 40px; height: 40px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 600; color: #fff; flex-shrink: 0; }
.avatar-lg { width: 60px; height: 60px; font-size: 20px; margin: 0 auto 12px; }
.name-list { list-style: none; padding: 0; margin: 0 0 16px; display: flex; flex-direction: column; gap: 8px; max-width: 360px; margin-left: auto; margin-right: auto; }
.name-list li { opacity: 0; animation: stagger-in var(--dur) ease-out forwards; animation-delay: calc(var(--stagger-index, 0) * 60ms); }
.name-tile { display: flex; align-items: center; gap: 12px; background: var(--color-card); border-radius: var(--radius-card); padding: 12px 14px; text-decoration: none; color: var(--color-fg); transition: transform 150ms; }
.name-tile:active { transform: scale(0.98); }
.name-tile-label { font-size: 14px; font-weight: 500; }
.admin-link { display: block; text-align: center; color: var(--color-muted); font-size: 13px; text-decoration: none; margin-top: 8px; }

.pin-screen { display: flex; flex-direction: column; align-items: center; max-width: 320px; margin: 0 auto; position: relative; padding-top: 8px; }
.back-link { position: absolute; left: 0; top: 8px; color: var(--color-fg); text-decoration: none; font-size: 18px; }
.pin-name { font-size: 16px; font-weight: 600; margin: 0 0 2px; }
.pin-dots { display: flex; gap: 14px; margin: 20px 0 28px; }
.pin-dot { width: 13px; height: 13px; border-radius: 50%; border: 2px solid var(--color-border); transition: background 150ms, border-color 150ms; }
.pin-dot-filled { background: var(--color-primary); border-color: var(--color-primary); }
.pin-pad { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; width: 100%; }
.pin-key { height: 54px; border-radius: 16px; background: var(--color-card); border: none; font-size: 19px; font-weight: 500; color: var(--color-fg); transition: transform 100ms; }
.pin-key:active { transform: scale(0.94); background: var(--color-bg); }
.pin-key-back { background: none; color: var(--color-muted); font-size: 20px; }

/* ---- nav ---- */
.app-nav { display: flex; gap: 12px; padding: 10px 16px; background: #fff; border-bottom: 1px solid #ddeeea; overflow-x: auto; }
.app-nav a { color: var(--color-muted); font-weight: 500; text-decoration: none; font-size: 13px; white-space: nowrap; }
.app-nav a.active { color: var(--color-primary); }
.app-nav--bottom { position: fixed; bottom: 0; left: 0; right: 0; border-bottom: none; border-top: 1px solid #ddeeea; justify-content: space-around; padding: 8px 8px calc(8px + env(safe-area-inset-bottom)); z-index: 6; }
.app-nav--bottom a { display: flex; flex-direction: column; align-items: center; gap: 2px; font-size: 11px; }
.app-nav--bottom .nav-icon { width: 20px; height: 20px; }

/* ---- today / class cards ---- */
.today-banner { background: var(--color-primary); color: #fff; padding: 20px 18px; border-radius: var(--radius-card); margin-bottom: 14px; }
.today-banner-date { display: block; font-size: 12px; color: var(--color-border); }
.today-banner-greeting { display: block; font-size: 18px; font-weight: 600; margin-top: 4px; }
.class-cards { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.class-cards li { opacity: 0; animation: stagger-in var(--dur) ease-out forwards; animation-delay: calc(var(--stagger-index, 0) * 60ms); }
.class-card a { display: flex; align-items: center; gap: 12px; background: var(--color-card); border-radius: var(--radius-card); padding: 14px; text-decoration: none; color: var(--color-fg); transition: transform 150ms; }
.class-card a:active { transform: scale(0.98); }
.class-card-icon { width: 38px; height: 38px; border-radius: 10px; background: #E1F5EE; color: var(--color-primary-dark); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.class-card-body { flex: 1; display: flex; flex-direction: column; gap: 2px; }
.class-card-name { font-size: 14px; font-weight: 600; }
.class-card-meta { font-size: 12px; color: var(--color-muted); }
.class-card-status { width: 10px; height: 10px; border-radius: 50%; background: #d8ede9; flex-shrink: 0; }
.class-card-status.is-marked { background: var(--color-primary); }

/* ---- roster / status chips ---- */
.roster { list-style: none; padding: 0; margin: 0 0 148px; display: flex; flex-direction: column; gap: 8px; }
.roster-row { display: flex; justify-content: space-between; align-items: center; background: var(--color-card); padding: 12px 14px; border-radius: var(--radius-card); gap: 8px; opacity: 0; animation: stagger-in var(--dur) ease-out forwards; animation-delay: calc(var(--stagger-index, 0) * 40ms); }
.student-name { flex: 1; font-size: 14px; }
.status-group { display: flex; gap: 5px; }
.status-btn { position: relative; }
.status-btn input { position: absolute; opacity: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; }
.status-btn { display: flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 10px; background: var(--color-bg); font-size: 12px; font-weight: 600; color: var(--color-muted); transition: transform 100ms, background 150ms, color 150ms; }
.status-btn:has(input:checked) { background: var(--color-primary); color: #fff; }
.status-btn:has(input[value="absent"]:checked) { background: var(--color-coral); }
.status-btn:has(input[value="late"]:checked) { background: var(--color-amber); }
.status-btn:active { transform: scale(0.92); }

.save-bar { position: fixed; bottom: 64px; left: 0; right: 0; background: #fff; padding: 12px 16px; box-shadow: 0 -2px 8px rgba(0,0,0,0.06); display: flex; flex-direction: column; align-items: center; gap: 6px; z-index: 5; }
.save-bar button { width: 100%; max-width: 340px; padding: 14px; font-size: 15px; font-weight: 600; background: var(--color-primary); color: #fff; border: none; border-radius: var(--radius-control); transition: transform 150ms; }
.save-bar button:active { transform: scale(0.97); }
#offline-indicator { font-size: 12px; color: var(--color-muted); }

/* ---- reports ---- */
.report-nav { display: flex; gap: 16px; margin-bottom: 14px; }
.report-nav a { color: var(--color-muted); font-weight: 600; text-decoration: none; font-size: 13px; padding-bottom: 4px; border-bottom: 2px solid transparent; }
.report-nav a.active { color: var(--color-primary); border-color: var(--color-primary); }

.month-pills { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 4px; margin-bottom: 14px; }
.month-pill { flex-shrink: 0; padding: 8px 16px; border-radius: 20px; background: var(--color-card); color: var(--color-fg); font-size: 12px; font-weight: 600; text-decoration: none; }
.month-pill-active { background: var(--color-primary); color: #fff; }

.stat-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 14px; }
.stat-card { background: var(--color-card); border-radius: var(--radius-card); padding: 14px; }
.stat-label { display: block; font-size: 11px; color: var(--color-muted); margin-bottom: 4px; }
.stat-value { display: block; font-size: 22px; font-weight: 700; color: var(--color-primary); }

.summary-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.summary-list li { opacity: 0; animation: stagger-in var(--dur) ease-out forwards; animation-delay: calc(var(--stagger-index, 0) * 40ms); }
.summary-row { display: flex; align-items: center; gap: 10px; background: var(--color-card); border-radius: var(--radius-card); padding: 10px 14px; }
.summary-name { flex: 1; font-size: 13px; }
.progress-bar { width: 90px; height: 6px; border-radius: 3px; background: #E1F5EE; overflow: hidden; flex-shrink: 0; }
.progress-fill { display: block; height: 100%; background: var(--color-primary); border-radius: 3px; }
.summary-pct { font-size: 12px; font-weight: 600; color: var(--color-primary-dark); width: 32px; text-align: right; flex-shrink: 0; }

.table-scroll { overflow-x: auto; }
.grid-table { border-collapse: collapse; width: 100%; background: var(--color-card); font-size: 13px; border-radius: var(--radius-card); overflow: hidden; }
.grid-table th, .grid-table td { border: 1px solid #eaf6f3; padding: 7px 9px; text-align: center; white-space: nowrap; }
.grid-table th { background: var(--color-bg); font-weight: 600; }
.grid-table th:first-child, .grid-table td:first-child { text-align: left; position: sticky; left: 0; background: var(--color-card); }

@keyframes stagger-in {
  from { opacity: 0; transform: translateY(10px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@media (max-width: 400px) {
  .app-main { padding: 12px; }
  .status-btn { width: 32px; height: 32px; font-size: 11px; }
}

@media (min-width: 560px) {
  .app-main { max-width: 560px; }
  .pin-pad, .name-list { max-width: 340px; }
}