/* ==========================================================================
   ใบงานดนตรี (Worksheet App) - Anime / Comic Style Theme for Secondary Students
   Designed for: ม.3 และ ม.4 โรงเรียนโนนไทยคุรุอุปถัมภ์
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Kanit:wght@400;500;600;700&family=Mali:wght@500;600;700&family=Sarabun:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

:root {
  /* Color Palette - Vibrant Anime Pastel (Light Mode) */
  --bg: #FAF7F2;
  --bg-pattern: #F2ECE1;
  --card: #FFFFFF;
  --card-alt: #FDFBF7;
  --ink: #2C2A29;
  --muted: #6B6864;
  --line: #E2DBD0;
  --line-strong: #3A3530;
  
  --accent: #2C8C74;
  --accent-light: #E0F2EE;
  --accent-hover: #226E5B;
  --accent-ink: #FFFFFF;
  
  --coral: #FF7B54;
  --coral-light: #FFEFEA;
  --yellow: #FFD166;
  --yellow-light: #FFF8E7;
  --purple: #8B5CF6;
  --purple-light: #F3E8FF;
  
  --chip: #EBF3F0;
  --chip-ink: #225C4D;
  --warn: #D9531E;
  --ok: #22863A;
  --shadow-comic: 0 4px 0 #E2DBD0, 0 10px 24px rgba(60, 40, 20, 0.05);
  --shadow-btn: 0 4px 0 var(--line-strong);
  --radius-card: 20px;
  --radius-btn: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161717;
    --bg-pattern: #1F2120;
    --card: #222423;
    --card-alt: #282B29;
    --ink: #F2F4F3;
    --muted: #A3A8A5;
    --line: #383D3A;
    --line-strong: #5A615D;
    
    --accent: #52C2A3;
    --accent-light: #1A332B;
    --accent-hover: #67D9BA;
    --accent-ink: #0E241E;
    
    --coral: #FF8F6B;
    --coral-light: #3D261E;
    --yellow: #FFD57A;
    --yellow-light: #332B18;
    --purple: #A78BFA;
    --purple-light: #2D2245;
    
    --chip: #293631;
    --chip-ink: #8FE3CA;
    --warn: #FF8552;
    --ok: #5FD678;
    --shadow-comic: 0 4px 0 #121313, 0 10px 24px rgba(0, 0, 0, 0.4);
    --shadow-btn: 0 4px 0 #0D0E0E;
  }
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

body {
  margin: 0;
  background-color: var(--bg);
  background-image: 
    radial-gradient(circle at 10% 20%, var(--bg-pattern) 2px, transparent 2px),
    radial-gradient(circle at 90% 80%, var(--bg-pattern) 2px, transparent 2px);
  background-size: 32px 32px;
  color: var(--ink);
  font-family: 'Sarabun', system-ui, -apple-system, sans-serif;
  font-size: 18px;
  line-height: 1.6;
  min-height: 100vh;
}

/* ==========================================================================
   Header & Decorative Branding
   ========================================================================== */

header, main {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 16px;
}

header {
  padding-top: 24px;
  padding-bottom: 8px;
  position: relative;
}

.header-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 8px;
}

.header-title-box {
  flex: 1;
}

.header-mascot {
  width: 76px;
  height: 76px;
  flex-shrink: 0;
  filter: drop-shadow(0 4px 8px rgba(0,0,0,0.1));
}

h1 {
  margin: 0 0 6px;
  font-family: 'Kanit', 'Mali', sans-serif;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: 0.2px;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 10px;
}

h2 {
  font-family: 'Kanit', 'Mali', sans-serif;
  font-size: 23px;
  font-weight: 600;
  margin: 4px 0 12px;
  color: var(--ink);
}

h3 {
  font-family: 'Kanit', sans-serif;
  font-size: 20px;
  font-weight: 600;
  margin: 16px 0 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

p.demo {
  font-size: 15px;
  color: var(--muted);
  margin: 4px 0 14px;
  background: var(--card);
  border: 1px solid var(--line);
  padding: 10px 14px;
  border-radius: 12px;
  line-height: 1.5;
}

p.demo a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: underline;
}

/* Navigation Tabs (Teacher page) */
nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 14px 0;
}

.tab {
  font-family: 'Kanit', sans-serif;
  font-size: 16px;
  font-weight: 600;
  padding: 10px 16px;
  border: 2px solid var(--line);
  border-radius: 12px;
  background: var(--card);
  color: var(--ink);
  cursor: pointer;
  transition: all 0.15s ease-out;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.tab:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.tab.active {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--line-strong);
  box-shadow: 0 3px 0 var(--line-strong);
  transform: translateY(-2px);
}

/* ==========================================================================
   Card Styling (Comic Anime Box)
   ========================================================================== */

.card {
  background: var(--card);
  border: 2px solid var(--line);
  border-radius: var(--radius-card);
  padding: 20px 22px;
  margin: 18px 0;
  box-shadow: var(--shadow-comic);
  position: relative;
  transition: border-color 0.2s;
}

/* Accent badges for Parts 1 and 2 */
.card h3 {
  padding-bottom: 6px;
  border-bottom: 2px dashed var(--line);
}

/* Form Labels & Text */
label {
  display: block;
  font-family: 'Kanit', sans-serif;
  font-weight: 600;
  font-size: 17px;
  margin-top: 14px;
  margin-bottom: 4px;
  color: var(--ink);
}

.hint {
  font-family: 'Sarabun', sans-serif;
  font-weight: 400;
  color: var(--muted);
  font-size: 15px;
  margin-top: 2px;
  margin-bottom: 6px;
}

.small {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.5;
}

/* ==========================================================================
   Buttons (Comic Pop & Bounce)
   ========================================================================== */

button.btn, .btn {
  font-family: 'Kanit', sans-serif;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.3px;
  padding: 10px 20px;
  border: 2px solid var(--line-strong);
  border-radius: var(--radius-btn);
  background: var(--card);
  color: var(--ink);
  cursor: pointer;
  min-height: 48px;
  box-shadow: var(--shadow-btn);
  transition: transform 0.12s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.12s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
}

button.btn:hover, .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 0 var(--line-strong);
}

button.btn:active, .btn:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 var(--line-strong);
}

button.primary, .btn.primary {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--line-strong);
}

button.primary:hover, .btn.primary:hover {
  background: var(--accent-hover);
}

/* Google Sign-in button with prominent styling */
#gg {
  background: #FFFFFF;
  color: #3C4043;
  border: 2px solid #3A3530;
  font-size: 18px;
  font-weight: 600;
  box-shadow: 0 4px 0 #3A3530;
  background-image: url('assets/icon_google.svg');
  background-repeat: no-repeat;
  background-position: 16px center;
  background-size: 24px 24px;
  padding-left: 50px;
}

@media (prefers-color-scheme: dark) {
  #gg {
    background-color: #2D3130;
    color: #FFFFFF;
    border-color: #5A615D;
    box-shadow: 0 4px 0 #121313;
  }
}

.small-btn {
  font-size: 14px;
  padding: 6px 14px;
  min-height: 36px;
  border-radius: 10px;
  margin: 4px 4px 4px 0;
  box-shadow: 0 3px 0 var(--line-strong);
}

/* ==========================================================================
   Inputs, Textarea & Select
   ========================================================================== */

input[type=text],
input[type=password],
input[type=email],
input[type=number],
textarea,
select {
  width: 100%;
  font-family: inherit;
  font-size: 17px;
  padding: 10px 14px;
  border: 2px solid var(--line);
  border-radius: 12px;
  background: var(--bg);
  color: var(--ink);
  transition: border-color 0.15s, box-shadow 0.15s, background-color 0.15s;
  min-height: 44px;
}

input[type=text]:focus,
input[type=password]:focus,
input[type=email]:focus,
input[type=number]:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--card);
  box-shadow: 0 0 0 3px var(--accent-light);
}

textarea {
  min-height: 84px;
  resize: vertical;
}

input[readonly], textarea[readonly] {
  opacity: 0.8;
  border-style: dashed;
  background: var(--card-alt);
}

.field {
  margin-bottom: 14px;
}

.row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.row > * {
  flex: 1 1 140px;
}

/* ==========================================================================
   Badges, Chips and Messages
   ========================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  font-family: 'Kanit', sans-serif;
  font-size: 13px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--coral-light);
  color: var(--coral);
  border: 1px solid var(--coral);
  margin-left: 8px;
}

.msg {
  padding: 12px 16px;
  border-radius: 14px;
  background: var(--accent-light);
  color: var(--accent);
  border: 2px solid var(--accent);
  font-weight: 500;
  margin: 14px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.member {
  border-top: 2px dashed var(--line);
  margin-top: 14px;
  padding-top: 10px;
}

/* ==========================================================================
   Level Buttons (Rating 1-5)
   ========================================================================== */

.levels {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 8px 0;
}

.levels button {
  font-family: 'Kanit', sans-serif;
  font-size: 15px;
  font-weight: 600;
  padding: 8px 14px;
  border: 2px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  color: var(--ink);
  cursor: pointer;
  min-height: 40px;
  transition: all 0.15s ease;
}

.levels button:hover {
  border-color: var(--accent);
  transform: scale(1.04);
}

.levels button.on {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--line-strong);
  box-shadow: 0 3px 0 var(--line-strong);
  transform: scale(1.05);
}

.desc {
  font-size: 15px;
  color: var(--muted);
  min-height: 1.6em;
  padding: 4px 6px;
}

/* Options / Radio / Self-Evaluation */
.selfopt {
  display: flex;
  align-items: center;
  padding: 10px 14px;
  border: 2px solid var(--line);
  border-radius: 12px;
  margin: 8px 0;
  font-weight: 500;
  cursor: pointer;
  background: var(--card-alt);
  transition: all 0.15s ease;
}

.selfopt:hover {
  border-color: var(--accent);
  background: var(--card);
}

.selfopt input {
  margin-right: 12px;
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

/* ==========================================================================
   Tables & ABC Notation Paper
   ========================================================================== */

.wrap, .wrapx {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 8px 0;
  border-radius: 12px;
  border: 1px solid var(--line);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 16px;
  background: var(--card);
}

th, td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
  vertical-align: middle;
}

th {
  background: var(--chip);
  color: var(--chip-ink);
  font-family: 'Kanit', sans-serif;
  font-weight: 600;
}

.pass {
  color: var(--ok);
  font-weight: 700;
}

.nopass {
  color: var(--warn);
  font-weight: 700;
}

/* Strictly crisp white ABC sheet paper */
.abc-ex {
  margin: 16px 0;
}

.abc-paper {
  background: #FFFFFF !important;
  border: 2px solid #D0C9BA;
  border-radius: 14px;
  padding: 10px 14px;
  max-width: 680px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
  margin: 8px 0;
}

.abc-paper, .abc-paper svg {
  color: #111111 !important;
  fill: #111111 !important;
}

.abc-paper svg path, .abc-paper svg rect {
  stroke: #111111 !important;
}


/* ==========================================================================
   Extended Unified System UI Components (Zero Custom CSS Required)
   ========================================================================== */

/* Aliases for quick status & button variants */
.pass, .ok {
  color: var(--ok);
  font-weight: 700;
}

.nopass, .no {
  color: var(--warn);
  font-weight: 700;
}

.small, .mut {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.5;
}

button.primary, .btn.primary, button.pri, .pri {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--line-strong);
}

button.primary:hover, .btn.primary:hover, button.pri:hover, .pri:hover {
  background: var(--accent-hover);
}

button.secondary, .btn.secondary {
  background: var(--card-alt);
  color: var(--ink);
  border-color: var(--line);
  box-shadow: 0 3px 0 var(--line);
}

button.secondary:hover, .btn.secondary:hover {
  border-color: var(--line-strong);
}

button.danger, .btn.danger {
  background: var(--warn);
  color: #FFFFFF;
  border-color: var(--line-strong);
}

button.success, .btn.success {
  background: var(--ok);
  color: #FFFFFF;
  border-color: var(--line-strong);
}

/* Compact UI Buttons (Teacher Dashboard & Toolbars) */
.btn-ui {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: 'Kanit', sans-serif;
  font-weight: 600;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: none;
}
.btn-ui:hover {
  transform: translateY(-1px);
  box-shadow: 0 3px 8px rgba(0,0,0,0.12);
}
.btn-ui:active {
  transform: translateY(1px);
  box-shadow: none;
}
.btn-ui-md { height: 36px; padding: 0 14px; font-size: 0.88rem; }
.btn-ui-sm { height: 28px; padding: 0 10px; font-size: 0.80rem; border-radius: 6px; }
.btn-ui-xs { height: 22px; padding: 0 7px; font-size: 0.74rem; border-radius: 5px; }

.btn-ui-primary { background: var(--accent); color: var(--accent-ink) !important; border-color: var(--accent-hover); }
.btn-ui-primary:hover { background: var(--accent-hover); }
.btn-ui-success { background: var(--ok); color: #ffffff !important; border-color: var(--ok); }
.btn-ui-success:hover { filter: brightness(0.92); }
.btn-ui-warning { background: var(--warn); color: #ffffff !important; border-color: var(--warn); }
.btn-ui-warning:hover { filter: brightness(0.92); }
.btn-ui-outline { background: var(--card); color: var(--ink); border-color: var(--line); }
.btn-ui-outline:hover { background: var(--card-alt); border-color: var(--line-strong); }
.btn-ui-subtle-blue, .btn-ui-subtle-accent { background: var(--accent-light); color: var(--accent); border-color: var(--accent); }
.btn-ui-subtle-blue:hover, .btn-ui-subtle-accent:hover { background: var(--accent); color: var(--accent-ink); }
.btn-ui-subtle-green { background: var(--chip); color: var(--chip-ink); border-color: var(--line); }
.btn-ui-subtle-green:hover { border-color: var(--ok); color: var(--ok); }
.btn-ui-subtle-amber { background: var(--yellow-light); color: var(--warn); border-color: var(--line); }
.btn-ui-subtle-amber:hover { border-color: var(--warn); }

/* Segmented Control Pills */
.seg-control {
  display: inline-flex;
  background: var(--card-alt);
  border: 1px solid var(--line);
  padding: 3px;
  border-radius: 10px;
  gap: 3px;
  align-items: center;
}
.seg-btn {
  font-family: 'Kanit', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 7px;
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.15s ease;
  line-height: 1;
  white-space: nowrap;
}
.seg-btn:hover {
  color: var(--ink);
}
.seg-btn.active {
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
  box-shadow: 0 2px 6px rgba(0,0,0,0.12);
}

/* Status Pills & Chips */
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: 'Kanit', sans-serif;
  font-size: 0.76rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  line-height: 1.2;
  white-space: nowrap;
}
.status-pill-green { background: var(--chip); color: var(--ok); border: 1px solid var(--ok); }
.status-pill-blue { background: var(--accent-light); color: var(--accent); border: 1px solid var(--accent); }
.status-pill-amber { background: var(--yellow-light); color: var(--warn); border: 1px solid var(--warn); }
.status-pill-gray { background: var(--card-alt); color: var(--muted); border: 1px solid var(--line); }
.status-pill-live { background: var(--coral-light); color: var(--coral); border: 1px solid var(--coral); }

/* Knowledge Card & Smart Group Components */
.knowledge-card {
  background: var(--card-alt);
  border: 2px solid var(--line);
  border-radius: var(--radius-card);
  margin-bottom: 16px;
  padding: 16px 20px;
  color: var(--ink);
}
.knowledge-card summary {
  font-family: 'Kanit', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent);
  cursor: pointer;
  user-select: none;
}
.smart-group-box {
  background: var(--card-alt);
  border: 2px solid var(--accent);
  border-radius: var(--radius-card);
  padding: 16px 20px;
  margin-bottom: 18px;
  color: var(--ink);
}
.smart-group-title {
  font-family: 'Kanit', sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--accent);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.smart-group-members {
  font-size: 0.95rem;
  color: var(--ink);
  line-height: 1.6;
}
.peer-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--card);
  border: 1.5px solid var(--line);
  color: var(--ink);
  padding: 4px 12px;
  border-radius: 999px;
  margin: 4px 4px 4px 0;
  font-size: 0.9rem;
  font-weight: 600;
}
.peer-remove {
  cursor: pointer;
  color: var(--warn);
  font-weight: bold;
  margin-left: 4px;
}

/* Group Grid in Classroom */
.group-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
  margin-top: 14px;
}
.group-card {
  background: var(--card);
  border: 2px solid var(--line);
  border-radius: 12px;
  padding: 14px;
}
.group-card.active {
  border-color: var(--accent);
}
.group-card-title {
  font-family: 'Kanit', sans-serif;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--ink);
  margin-bottom: 6px;
  display: flex;
  justify-content: space-between;
}
.group-card-members {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.5;
}

/* ==========================================================================
   Mobile & Responsive Adjustments
   ========================================================================== */

@media (max-width: 520px) {
  body {
    font-size: 17px;
  }
  
  header, main {
    padding: 0 12px;
  }
  
  .card {
    padding: 16px 14px;
    border-radius: 16px;
    margin: 12px 0;
  }
  
  h1 {
    font-size: 24px;
  }
  
  .header-mascot {
    width: 60px;
    height: 60px;
  }
  
  .row > * {
    flex-basis: 100%;
  }
  
  button.btn, .btn {
    width: 100%;
    margin-right: 0 !important;
    margin-bottom: 8px;
  }
  
  .tab {
    flex: 1 1 auto;
    font-size: 15px;
    padding: 8px 12px;
  }
}

/* ให้แอตทริบิวต์ hidden ใช้ได้เสมอ (nav แสดงก่อนล็อกอินเพราะ display:flex ทับ) */
[hidden] { display: none !important; }


/* สถานะล็อคใบงานที่ส่งแล้ว (Submitted / Read-Only Worksheet Lock) */
.field input:disabled,
.field textarea:disabled,
.field select:disabled {
  background-color: #f1f5f9 !important;
  color: #1e293b !important;
  border-color: #cbd5e1 !important;
  cursor: not-allowed !important;
  opacity: 0.95 !important;
  -webkit-text-fill-color: #1e293b !important;
}

.field input[type="radio"]:disabled,
.field input[type="checkbox"]:disabled {
  cursor: not-allowed !important;
  opacity: 0.85 !important;
}

.field label.selfopt:has(input:checked) {
  background-color: #e0f2fe !important;
  border-color: #0284c7 !important;
  color: #0369a1 !important;
  font-weight: 700;
}


/* ตารางเลือกคำตอบ (grid) ในใบงาน: ช่องต้องมองเห็นคำตอบที่เลือกแล้วบนมือถือ */
table.grid { width: 100%; border-collapse: collapse; table-layout: fixed; }
table.grid select { padding: 8px 20px 8px 8px; font-size: 15px; min-height: 44px; text-overflow: ellipsis; background-position: right 4px center; }
table.grid select:not([value=""]) { font-weight: 600; }
@media (max-width: 720px) {
  table.grid, table.grid tbody, table.grid tr, table.grid th, table.grid td { display: block; width: 100%; box-sizing: border-box; }
  table.grid { table-layout: auto; }
  table.grid tr:first-child { display: none; }               /* แถวหัวคอลัมน์ ใช้ป้ายในแต่ละช่องแทน */
  table.grid tr { border: 1px solid var(--line); border-radius: 12px; margin: 10px 0; padding: 8px 10px; background: var(--card); }
  table.grid tr th { font-size: 1.02rem; text-align: left; padding: 4px 2px 8px; border: 0; background: transparent; color: var(--accent); }
  table.grid tr td { display: grid; grid-template-columns: 38% 1fr; align-items: center; gap: 8px; padding: 4px 0; border: 0; background: transparent; }
  table.grid tr td::before { content: attr(data-col); font-size: .95rem; color: var(--muted); }
  table.grid select { font-size: 17px; padding: 8px 28px 8px 12px; }
}