/* ==========================================================
   ระบบวิเคราะห์ค่าความเที่ยงตรงของแบบสอบถาม (IOC)
   ธีม: เรียบหรู มินิมอล ใช้งานง่าย — เลย์เอาต์แถบเมนูด้านซ้าย
   ========================================================== */
:root {
  --c1: #FFBF00;
  --c2: #FFF78D;
  --c3: #467235;
  --c3-dark: #35591F;
  --c4: #283F24;
  --c4-soft: #33502D;
  --ink: #232823;
  --muted: #707A68;
  --muted-2: #97A08D;
  --bg: #FFFFFF;
  --surface: #F7F8F4;
  --surface-2: #EFF2E9;
  --border: #E3E6DC;
  --danger: #A6362F;
  --danger-bg: #FCEEED;
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(40,63,36,.05);
  --shadow: 0 4px 18px rgba(40,63,36,.08);
  --sidebar-w: 240px;
}

* { box-sizing: border-box; }
html { -webkit-font-smoothing: antialiased; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Sarabun', sans-serif;
  background: var(--surface);
  color: var(--ink);
  font-size: 15.5px;
  line-height: 1.7;
}

a { color: var(--c3); text-decoration: none; }
a:hover { color: var(--c3-dark); text-decoration: underline; }
::selection { background: var(--c2); color: var(--c4); }

/* ================= Sidebar ================= */
.sidebar {
  position: fixed; top: 0; left: 0; bottom: 0; width: var(--sidebar-w);
  background: var(--c4);
  display: flex; flex-direction: column;
  z-index: 50;
  transition: transform .25s ease;
}
.sidebar-brand {
  color: #fff; font-weight: 700; font-size: 1.02rem;
  padding: 22px 22px 18px;
  display: flex; align-items: center; gap: 8px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.brand-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--c1); display: inline-block; flex-shrink: 0; }
.sidebar-nav { flex: 1; padding: 16px 12px; overflow-y: auto; }
.nav-section-label {
  color: rgba(255,255,255,.4); font-size: .72rem; text-transform: uppercase;
  letter-spacing: .6px; font-weight: 600; padding: 14px 12px 6px;
}
.nav-section-label:first-child { padding-top: 4px; }
.sidebar-nav a {
  display: block; color: rgba(255,255,255,.75); font-size: .92rem;
  padding: 10px 12px; border-radius: var(--radius-sm); margin-bottom: 2px;
  border-left: 3px solid transparent;
}
.sidebar-nav a:hover { background: rgba(255,255,255,.06); color: #fff; text-decoration: none; }
.sidebar-nav a.active {
  background: rgba(255,255,255,.1); color: #fff; font-weight: 600;
  border-left-color: var(--c1);
}
.sidebar-user {
  padding: 16px 20px 20px; border-top: 1px solid rgba(255,255,255,.08);
}
.sidebar-user .user-chip { color: #fff; font-size: .88rem; margin-bottom: 6px; }
.sidebar-user .logout-link { color: rgba(255,255,255,.55); font-size: .82rem; }
.sidebar-user .logout-link:hover { color: #fff; }

/* Mobile toggle button + backdrop */
.mobile-toggle {
  display: none; position: fixed; top: 14px; left: 14px; z-index: 60;
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  background: var(--c4); border: none; cursor: pointer;
  flex-direction: column; align-items: center; justify-content: center; gap: 4px;
}
.mobile-toggle span { display: block; width: 20px; height: 2px; background: #fff; transition: transform .2s, opacity .2s; }
.mobile-toggle.is-active span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.mobile-toggle.is-active span:nth-child(2) { opacity: 0; }
.mobile-toggle.is-active span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
.sidebar-backdrop {
  display: none; position: fixed; inset: 0; background: rgba(0,0,0,.35); z-index: 45;
}
.sidebar-backdrop.show { display: block; }

/* ================= Main content area ================= */
html, body { height: 100%; }
.app-main {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.app-main.has-sidebar { margin-left: var(--sidebar-w); }

.page-container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 32px 32px 60px;
  min-height: 60vh;
  flex: 1 0 auto;
  width: 100%;
}

.site-footer {
  flex-shrink: 0;
  text-align: center;
  padding: 24px 10px;
  font-size: .78rem;
  color: var(--muted-2);
  border-top: 1px solid var(--border);
  background: var(--bg);
}

/* ================= Steps (clickable status bar) ================= */
.steps { display: flex; gap: 6px; margin: 0 0 28px; flex-wrap: wrap; }
.step {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 14px; border-radius: 999px;
  font-size: .82rem; background: var(--bg); border: 1px solid var(--border); color: var(--muted);
}
a.step { cursor: pointer; }
a.step:hover { border-color: var(--c3); color: var(--c3); text-decoration: none; }
.step .num {
  width: 18px; height: 18px; border-radius: 50%; background: var(--border); color: var(--bg);
  font-size: .72rem; display: flex; align-items: center; justify-content: center; font-weight: 700; flex-shrink: 0;
}
.step.done { border-color: var(--c3); color: var(--c3); }
.step.done .num { background: var(--c3); color: #fff; }
.step.active { border-color: var(--c4); color: var(--c4); background: var(--surface-2); font-weight: 600; }
.step.active .num { background: var(--c4); color: #fff; }

/* ================= Typography ================= */
h1 { color: var(--c4); font-size: 1.6rem; font-weight: 700; margin: 0 0 6px; letter-spacing: -.2px; }
h2 { color: var(--c4); font-size: 1.08rem; font-weight: 700; margin: 0 0 16px; }
h3 { color: var(--c4); font-size: .98rem; font-weight: 600; }
p  { color: var(--ink); }
.subtitle { color: var(--muted); font-size: .92rem; margin-top: 0; margin-bottom: 24px; }
.helper-text { color: var(--muted); font-size: .82rem; margin-top: 4px; }

/* ================= Card ================= */
.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 28px;
  margin-bottom: 22px;
  box-shadow: var(--shadow-sm);
}
.card-flush { padding: 0; overflow: hidden; }
.card-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px 24px; border-bottom: 1px solid var(--border); background: var(--surface);
}
.card-header h2 { margin: 0; }
.card-body { padding: 24px; }

.empty-state { text-align: center; padding: 48px 24px; color: var(--muted); }
.empty-state p { margin: 0 0 16px; }

/* ================= Forms ================= */
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-weight: 600; font-size: .86rem; color: var(--c4); margin-bottom: 6px; }
.form-group label .req { color: var(--danger); }
.form-row { display: flex; gap: 18px; flex-wrap: wrap; }
.form-row .form-group { flex: 1; min-width: 220px; }

input[type=text], input[type=email], input[type=password], input[type=tel],
input[type=date], input[type=time], input[type=url], input[type=number],
textarea, select {
  width: 100%; padding: 10px 13px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-family: inherit; font-size: .95rem; background: var(--bg); color: var(--ink);
  transition: border-color .15s, box-shadow .15s;
}
input:focus, textarea:focus, select:focus {
  outline: none; border-color: var(--c3); box-shadow: 0 0 0 3px rgba(70,114,53,.12);
}
input::placeholder, textarea::placeholder { color: var(--muted-2); }
textarea { resize: vertical; min-height: 88px; }
select { cursor: pointer; }

fieldset { border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; margin: 0 0 18px; }
legend { padding: 0 8px; font-weight: 600; color: var(--c4); font-size: .88rem; }

/* ================= Buttons ================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 20px; border-radius: var(--radius-sm); border: 1px solid var(--c3);
  background: var(--c3); color: #fff; font-family: inherit; font-size: .92rem; font-weight: 600;
  cursor: pointer; transition: background .15s, transform .05s, opacity .15s; line-height: 1.4;
}
.btn:hover { background: var(--c3-dark); border-color: var(--c3-dark); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .4; cursor: not-allowed; }
.btn-sm { padding: 5px 12px; font-size: .82rem; }
.btn-accent { background: var(--c1); color: var(--c4); border-color: var(--c1); }
.btn-accent:hover { background: #E8AC00; border-color: #E8AC00; }
.btn-outline { background: var(--bg); color: var(--c3); border: 1px solid var(--border); }
.btn-outline:hover { border-color: var(--c3); background: var(--surface); color: var(--c3-dark); }
.btn-danger { background: var(--bg); color: var(--danger); border: 1px solid var(--border); }
.btn-danger:hover { border-color: var(--danger); background: var(--danger-bg); }
.btn-block { width: 100%; }

.actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

/* ================= Alerts ================= */
.alert {
  padding: 12px 16px; border-radius: var(--radius-sm); margin-bottom: 20px; font-size: .9rem;
  border: 1px solid transparent; display: flex; align-items: center; gap: 8px;
}
.alert-success { background: #EEF6E9; color: var(--c3-dark); border-color: #CFE4C1; }
.alert-error   { background: var(--danger-bg); color: var(--danger); border-color: #F0C9C6; }

/* ================= Table ================= */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .91rem; }
th, td { padding: 12px 14px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: middle; }
th { color: var(--c4); font-weight: 700; font-size: .78rem; text-transform: uppercase; letter-spacing: .4px; background: var(--surface); white-space: nowrap; }
tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--surface); }

/* ================= Badge ================= */
.badge {
  display: inline-flex; align-items: center; gap: 5px; padding: 3px 11px; border-radius: 999px;
  font-size: .76rem; font-weight: 600; border: 1px solid transparent;
}
.badge::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.badge-pass    { background: #EEF6E9; color: var(--c3-dark); border-color: #CFE4C1; }
.badge-fail    { background: var(--danger-bg); color: var(--danger); border-color: #F0C9C6; }
.badge-pending { background: var(--surface); color: var(--muted); border-color: var(--border); }
.badge-info    { background: #EAF0FA; color: #2B4C7E; border-color: #CBDBF2; }

/* ================= Auth (no sidebar) ================= */
.auth-wrap { max-width: 560px; margin: 60px auto; }
.auth-wrap .card { padding: 36px 36px 32px; }
.auth-wrap h1 { text-align: center; margin-bottom: 4px; }
.auth-sub { text-align: center; color: var(--muted); font-size: .88rem; margin-bottom: 26px; }
.auth-footer-link { text-align: center; margin-top: 18px; font-size: .9rem; color: var(--muted); }

/* ================= Dashboard stat cards ================= */
.stat-card { flex: 1; min-width: 200px; }
.stat-card .stat-value { font-size: 1.7rem; font-weight: 700; color: var(--c4); margin: 2px 0; }
.stat-card .stat-label { font-size: .82rem; color: var(--muted); }

/* ================= Question builder tree ================= */
.q-node { border-left: 2px solid var(--border); padding: 12px 16px; margin-bottom: 6px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.q-node:hover { background: var(--surface); }
.q-node.is-topic { border-left-color: var(--c3); background: var(--surface); }
.q-node strong { color: var(--c4); }
.q-node-actions { display: flex; gap: 4px; white-space: nowrap; font-size: .8rem; }
.q-node-actions button, .q-node-actions .btn { padding: 3px 9px; font-size: .78rem; }

/* ================= Radio / choice groups (ให้คะแนน IOC) ================= */
.choice-row { display: flex; gap: 20px; flex-wrap: wrap; margin-bottom: 10px; }
.choice-row label {
  font-weight: 400; display: flex; align-items: center; gap: 6px; color: var(--ink); cursor: pointer;
  padding: 6px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg); transition: border-color .15s, background .15s;
}
.choice-row label:hover { border-color: var(--c3); }
.choice-row input[type=radio] { accent-color: var(--c3); }

/* ================= Responsive ================= */
@media (max-width: 880px) {
  .sidebar { transform: translateX(-100%); box-shadow: var(--shadow); }
  .sidebar.open { transform: translateX(0); }
  .mobile-toggle { display: flex; }
  .app-main.has-sidebar { margin-left: 0; }
  .page-container { padding: 72px 18px 60px; }
  .card { padding: 20px; }
  .form-row { gap: 10px; }
  h1 { font-size: 1.35rem; }
  .steps { gap: 4px; }
  .step { font-size: .78rem; padding: 6px 10px; }
}