/* ============================================================
   ATSY SolarSurvey — Design System
   Brand: AMARIT Solar System
   Colors: Primary Blue #004D99 | Primary Orange #FF9933
   ============================================================ */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Sarabun:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&family=Inter:wght@300;400;500;600;700&display=swap');

/* ============================================================
   CSS CUSTOM PROPERTIES — LIGHT MODE (default)
   ============================================================ */
:root {
  /* Brand */
  --brand-blue:       #004D99;
  --brand-blue-light: #0066CC;
  --brand-blue-dark:  #003A73;
  --brand-orange:     #FF9933;
  --brand-orange-light:#FFB347;
  --brand-orange-dark: #E07B00;

  /* Semantic */
  --primary:       var(--brand-blue);
  --primary-hover: var(--brand-blue-light);
  --accent:        var(--brand-orange);
  --accent-hover:  var(--brand-orange-dark);
  --danger:        #DC2626;
  --success:       #16A34A;
  --warning:       #D97706;
  --info:          #0284C7;

  /* Surfaces */
  --bg:            #F5F7FA;
  --surface:       #FFFFFF;
  --surface-2:     #F0F4F8;
  --surface-3:     #E8EDF5;
  --overlay:       rgba(0, 0, 0, 0.45);

  /* Text */
  --text-primary:  #1A2332;
  --text-secondary:#4A5568;
  --text-muted:    #718096;
  --text-inverse:  #FFFFFF;
  --text-on-accent:#FFFFFF;

  /* Borders */
  --border:        #DDE2EA;
  --border-focus:  var(--brand-blue);
  --border-error:  var(--danger);

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.05);
  --shadow:     0 4px 12px rgba(0,0,0,0.10), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-md:  0 8px 24px rgba(0,0,0,0.12), 0 4px 8px rgba(0,0,0,0.08);
  --shadow-lg:  0 16px 48px rgba(0,0,0,0.15), 0 8px 16px rgba(0,0,0,0.10);

  /* Glassmorphism */
  --glass-bg:     rgba(255,255,255,0.75);
  --glass-border: rgba(255,255,255,0.60);
  --glass-blur:   blur(16px);

  /* Typography */
  --font-th:  'Sarabun', sans-serif;
  --font-en:  'Inter', 'Sarabun', sans-serif;
  --font-size-xs:   0.75rem;    /* 12px */
  --font-size-sm:   0.875rem;   /* 14px */
  --font-size-base: 1rem;       /* 16px */
  --font-size-lg:   1.125rem;   /* 18px */
  --font-size-xl:   1.25rem;    /* 20px */
  --font-size-2xl:  1.5rem;     /* 24px */
  --font-size-3xl:  1.875rem;   /* 30px */
  --font-size-4xl:  2.25rem;    /* 36px */

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Radius */
  --radius-sm:  0.375rem;
  --radius:     0.625rem;
  --radius-md:  0.875rem;
  --radius-lg:  1.25rem;
  --radius-xl:  1.75rem;
  --radius-full:9999px;

  /* Transitions */
  --transition-fast:  150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition:       250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow:  400ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Navbar */
  --nav-height: 64px;
  --nav-bg:     var(--brand-blue);

  /* Sidebar */
  --sidebar-width: 260px;
}

/* ============================================================
   DARK MODE
   ============================================================ */
[data-theme="dark"] {
  --bg:            #0D1117;
  --surface:       #161B22;
  --surface-2:     #21262D;
  --surface-3:     #2D333B;

  --text-primary:  #E6EDF3;
  --text-secondary:#8B949E;
  --text-muted:    #6E7681;

  --border:        #30363D;
  --border-focus:  var(--brand-orange);

  --shadow-sm:  0 1px 3px rgba(0,0,0,0.35);
  --shadow:     0 4px 12px rgba(0,0,0,0.40);
  --shadow-md:  0 8px 24px rgba(0,0,0,0.50);
  --shadow-lg:  0 16px 48px rgba(0,0,0,0.60);

  --glass-bg:     rgba(22, 27, 34, 0.80);
  --glass-border: rgba(255,255,255,0.08);

  --nav-bg: #161B22;
  --primary: var(--brand-orange);
  --primary-hover: var(--brand-orange-light);
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-th);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg);
  transition: background-color var(--transition), color var(--transition);
  min-height: 100vh;
}

/* English language context */
[data-lang="en"] body,
[data-lang="en"] .nav-brand,
[data-lang="en"] h1,
[data-lang="en"] h2,
[data-lang="en"] h3,
[data-lang="en"] h4,
[data-lang="en"] h5,
[data-lang="en"] h6,
[data-lang="en"] p,
[data-lang="en"] label,
[data-lang="en"] span,
[data-lang="en"] button,
[data-lang="en"] input,
[data-lang="en"] select,
[data-lang="en"] textarea {
  font-family: var(--font-en);
}

a { color: var(--primary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--primary-hover); }

img { max-width: 100%; height: auto; display: block; }

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
}
h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-base); font-weight: 600; }
h6 { font-size: var(--font-size-sm); font-weight: 600; }
p  { color: var(--text-secondary); }

.text-muted    { color: var(--text-muted) !important; }
.text-primary-color { color: var(--primary) !important; }
.text-accent   { color: var(--accent) !important; }
.text-danger   { color: var(--danger) !important; }
.text-success  { color: var(--success) !important; }
.text-sm       { font-size: var(--font-size-sm); }
.text-xs       { font-size: var(--font-size-xs); }
.text-lg       { font-size: var(--font-size-lg); }
.text-xl       { font-size: var(--font-size-xl); }
.font-medium   { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold     { font-weight: 700; }

/* ============================================================
   NAVIGATION
   ============================================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: var(--nav-bg);
  display: flex;
  align-items: center;
  padding: 0 var(--space-6);
  z-index: 1000;
  box-shadow: 0 2px 12px rgba(0,0,0,0.25);
  transition: background var(--transition);
}

[data-theme="dark"] .navbar {
  border-bottom: 1px solid var(--border);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo {
  height: 48px;
  width: auto;
}

.nav-brand-text {
  display: flex;
  flex-direction: column;
}

.nav-brand-name {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.nav-brand-sub {
  font-size: var(--font-size-xs);
  color: rgba(255,255,255,0.70);
  line-height: 1.2;
}

.nav-spacer { flex: 1; }

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  font-size: var(--font-size-sm);
  font-weight: 500;
  font-family: inherit;
  transition: all var(--transition-fast);
  background: transparent;
  color: rgba(255,255,255,0.85);
}

.nav-btn:hover {
  background: rgba(255,255,255,0.12);
  color: #FFFFFF;
}

.nav-btn.active {
  background: rgba(255,255,255,0.18);
  color: #FFFFFF;
}

.nav-btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-full);
}

/* Theme toggle icon */
.icon-sun, .icon-moon {
  font-size: 18px;
  transition: transform var(--transition);
}
[data-theme="light"] .icon-sun  { display: none; }
[data-theme="light"] .icon-moon { display: inline-block; }
[data-theme="dark"] .icon-sun   { display: inline-block; }
[data-theme="dark"] .icon-moon  { display: none; }

/* Language toggle */
.lang-toggle {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.12);
  border-radius: var(--radius-full);
  padding: 2px;
  gap: 2px;
}
.lang-btn {
  padding: 4px 10px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  font-size: var(--font-size-xs);
  font-weight: 600;
  background: transparent;
  color: rgba(255,255,255,0.70);
  transition: all var(--transition-fast);
  font-family: inherit;
}
.lang-btn.active {
  background: rgba(255,255,255,0.95);
  color: var(--brand-blue);
}

/* User avatar */
.nav-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--brand-orange);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: 700;
  cursor: pointer;
  position: relative;
  border: 2px solid rgba(255,255,255,0.30);
  transition: border-color var(--transition-fast);
}
.nav-avatar:hover { border-color: rgba(255,255,255,0.70); }

/* Dropdown menu */
.dropdown {
  position: relative;
}
.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 200px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: var(--space-2) 0;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
}
.dropdown-menu.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  cursor: pointer;
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  transition: background var(--transition-fast);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  font-family: inherit;
}
.dropdown-item:hover { background: var(--surface-2); }
.dropdown-divider {
  height: 1px;
  background: var(--border);
  margin: var(--space-2) 0;
}
.dropdown-header {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--space-2);
}
.dropdown-name {
  font-weight: 600;
  color: var(--text-primary);
  font-size: var(--font-size-sm);
}
.dropdown-level {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

/* Mobile hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: rgba(255,255,255,0.85);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* ============================================================
   LAYOUT
   ============================================================ */
.page-wrapper {
  padding-top: var(--nav-height);
  min-height: 100vh;
}

.main-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-8) var(--space-6);
}

.main-container-sm {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-8) var(--space-6);
}

/* ============================================================
   CARDS
   ============================================================ */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), border-color var(--transition);
  overflow: hidden;
}

.card:hover { box-shadow: var(--shadow); }

.card-glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.card-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.card-header-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
}

.card-subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

.card-body {
  padding: var(--space-6);
}

.card-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border);
  background: var(--surface-2);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  font-size: var(--font-size-sm);
  font-weight: 600;
  font-family: inherit;
  line-height: 1;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background var(--transition-fast);
}
.btn:hover::after { background: rgba(255,255,255,0.08); }
.btn:active::after { background: rgba(0,0,0,0.08); }

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Sizes */
.btn-xs { padding: var(--space-1) var(--space-3); font-size: var(--font-size-xs); border-radius: var(--radius-sm); }
.btn-sm { padding: var(--space-2) var(--space-4); font-size: var(--font-size-sm); }
.btn-lg { padding: var(--space-4) var(--space-8); font-size: var(--font-size-lg); border-radius: var(--radius-md); }
.btn-xl { padding: var(--space-5) var(--space-10); font-size: var(--font-size-xl); border-radius: var(--radius-lg); }
.btn-block { width: 100%; }

/* Variants */
.btn-primary {
  background: linear-gradient(135deg, var(--brand-blue) 0%, var(--brand-blue-light) 100%);
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(0, 77, 153, 0.30);
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--brand-blue-light) 0%, var(--brand-blue) 100%);
  box-shadow: 0 6px 16px rgba(0, 77, 153, 0.40);
  transform: translateY(-1px);
}

.btn-accent {
  background: linear-gradient(135deg, var(--brand-orange-dark) 0%, var(--brand-orange) 100%);
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(255, 153, 51, 0.35);
}
.btn-accent:hover {
  box-shadow: 0 6px 16px rgba(255, 153, 51, 0.45);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: #FFFFFF;
}

.btn-outline-accent {
  background: transparent;
  border: 2px solid var(--accent);
  color: var(--accent);
}
.btn-outline-accent:hover {
  background: var(--accent);
  color: #FFFFFF;
}

.btn-ghost {
  background: var(--surface-2);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--surface-3); }

.btn-danger {
  background: var(--danger);
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.30);
}
.btn-danger:hover { box-shadow: 0 6px 16px rgba(220, 38, 38, 0.40); transform: translateY(-1px); }

.btn-success {
  background: var(--success);
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(22, 163, 74, 0.30);
}

/* Loading state */
.btn-loading {
  pointer-events: none;
  opacity: 0.85;
}
.btn-loading::before {
  content: '';
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.35);
  border-top-color: #FFFFFF;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin-right: var(--space-2);
}

/* ============================================================
   FORM ELEMENTS
   ============================================================ */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.form-label .required {
  color: var(--danger);
  margin-left: 2px;
}

.form-hint {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  margin-top: var(--space-1);
}

.form-error {
  font-size: var(--font-size-xs);
  color: var(--danger);
  margin-top: var(--space-1);
  display: none;
}

.form-control {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  font-family: inherit;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition);
  outline: none;
  appearance: none;
}

.form-control:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(0, 77, 153, 0.12);
  background: var(--surface);
}

[data-theme="dark"] .form-control:focus {
  box-shadow: 0 0 0 3px rgba(255, 153, 51, 0.15);
}

.form-control:disabled {
  background: var(--surface-2);
  cursor: not-allowed;
  opacity: 0.7;
}

.form-control.is-invalid {
  border-color: var(--border-error);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.10);
}

.form-control.is-invalid + .form-error { display: block; }

textarea.form-control {
  resize: vertical;
  min-height: 80px;
}

select.form-control {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236E7681' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14L2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

/* Radio and Checkbox */
.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition-fast);
  background: var(--surface);
}

.form-check:hover {
  border-color: var(--primary);
  background: var(--surface-2);
}

.form-check.checked {
  border-color: var(--primary);
  background: rgba(0, 77, 153, 0.05);
}

[data-theme="dark"] .form-check.checked {
  background: rgba(255, 153, 51, 0.07);
  border-color: var(--accent);
}

.form-check input[type="radio"],
.form-check input[type="checkbox"] {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  accent-color: var(--primary);
  cursor: pointer;
  margin-top: 2px;
}

.check-group {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: var(--space-3);
}

/* ============================================================
   BADGES & TAGS
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  line-height: 1.5;
  white-space: nowrap;
}

.badge-primary  { background: rgba(0,77,153,0.12);  color: var(--brand-blue); }
.badge-accent   { background: rgba(255,153,51,0.15); color: var(--brand-orange-dark); }
.badge-success  { background: rgba(22,163,74,0.12);  color: var(--success); }
.badge-danger   { background: rgba(220,38,38,0.12);  color: var(--danger); }
.badge-warning  { background: rgba(217,119,6,0.12);  color: var(--warning); }
.badge-neutral  { background: var(--surface-3);       color: var(--text-secondary); }

[data-theme="dark"] .badge-primary { background: rgba(0,77,153,0.25); color: #5BA3F5; }
[data-theme="dark"] .badge-accent  { background: rgba(255,153,51,0.25); color: var(--brand-orange-light); }

/* Level badges */
.level-admin      { background: rgba(220,38,38,0.12); color: var(--danger); }
.level-supervisor { background: rgba(255,153,51,0.15); color: var(--brand-orange-dark); }
.level-member     { background: rgba(22,163,74,0.12); color: var(--success); }

/* ============================================================
   ALERTS
   ============================================================ */
.alert {
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius);
  border-left: 4px solid;
  display: flex;
  gap: var(--space-3);
  font-size: var(--font-size-sm);
}

.alert-info    { background: rgba(2,132,199,0.08);  border-color: var(--info);    color: var(--info); }
.alert-success { background: rgba(22,163,74,0.08);  border-color: var(--success); color: var(--success); }
.alert-warning { background: rgba(217,119,6,0.08);  border-color: var(--warning); color: var(--warning); }
.alert-danger  { background: rgba(220,38,38,0.08);  border-color: var(--danger);  color: var(--danger); }

/* ============================================================
   TABLES
   ============================================================ */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

thead tr {
  background: var(--surface-2);
}

th {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}

td {
  padding: var(--space-3) var(--space-4);
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition-fast);
}

tbody tr:hover td { background: var(--surface-2); }
tbody tr:last-child td { border-bottom: none; }

/* ============================================================
   STATS / KPI CARDS
   ============================================================ */
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-orange), var(--brand-blue));
}

.stat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: var(--space-4);
}

.stat-value {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

/* ============================================================
   SECTION HEADERS
   ============================================================ */
.section-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 2px solid var(--border);
}

.section-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--brand-orange), var(--brand-orange-dark));
  color: #FFFFFF;
}

.section-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
}

.section-subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin-top: 2px;
}

/* ============================================================
   PAGE HEADER
   ============================================================ */
.page-header {
  background: linear-gradient(135deg, var(--brand-blue) 0%, var(--brand-blue-light) 60%, var(--brand-orange-dark) 100%);
  padding: var(--space-10) var(--space-6);
  color: #FFFFFF;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '☀';
  position: absolute;
  font-size: 200px;
  opacity: 0.04;
  right: -20px;
  top: -30px;
  line-height: 1;
}

.page-header-content {
  max-width: 1280px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.page-header h1 {
  color: #FFFFFF;
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-2);
}

.page-header p {
  color: rgba(255,255,255,0.80);
  font-size: var(--font-size-lg);
}

/* ============================================================
   MODAL
   ============================================================ */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: var(--overlay);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}

.modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.92) translateY(20px);
  transition: transform var(--transition);
}

.modal-backdrop.open .modal {
  transform: scale(1) translateY(0);
}

.modal-header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title { font-size: var(--font-size-lg); font-weight: 700; }

.modal-close {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  border: none;
  background: var(--surface-2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text-muted);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}
.modal-close:hover { background: var(--surface-3); color: var(--text-primary); }

.modal-body   { padding: var(--space-6); }
.modal-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border);
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
}

/* ============================================================
   TOAST NOTIFICATIONS
   ============================================================ */
.toast-container {
  position: fixed;
  top: calc(var(--nav-height) + 16px);
  right: var(--space-4);
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 300px;
  max-width: 400px;
  animation: slideInRight 0.3s ease;
  transition: all var(--transition);
}

.toast.removing { animation: slideOutRight 0.3s ease forwards; }
.toast-icon { font-size: 20px; flex-shrink: 0; }
.toast-content { flex: 1; }
.toast-title { font-weight: 600; font-size: var(--font-size-sm); color: var(--text-primary); }
.toast-msg { font-size: var(--font-size-xs); color: var(--text-muted); margin-top: 2px; }
.toast-close {
  background: none; border: none; cursor: pointer;
  color: var(--text-muted); font-size: 18px; padding: 0;
  transition: color var(--transition-fast); flex-shrink: 0;
}
.toast-close:hover { color: var(--text-primary); }

.toast-success { border-left: 4px solid var(--success); }
.toast-error   { border-left: 4px solid var(--danger); }
.toast-warning { border-left: 4px solid var(--warning); }
.toast-info    { border-left: 4px solid var(--info); }

/* ============================================================
   LOADING SPINNER
   ============================================================ */
.spinner-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 4000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}

.spinner-overlay.active {
  opacity: 1;
  visibility: visible;
}

.spinner {
  width: 56px;
  height: 56px;
  border: 5px solid rgba(255,255,255,0.25);
  border-top-color: var(--brand-orange);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.spinner-text {
  color: #FFFFFF;
  font-size: var(--font-size-sm);
  font-weight: 600;
}

/* ============================================================
   EMPTY STATE
   ============================================================ */
.empty-state {
  text-align: center;
  padding: var(--space-16) var(--space-8);
}

.empty-icon {
  font-size: 64px;
  margin-bottom: var(--space-4);
  opacity: 0.5;
}

.empty-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.empty-desc {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  max-width: 400px;
  margin: 0 auto var(--space-6);
}

/* ============================================================
   UTILITIES
   ============================================================ */
.d-flex     { display: flex; }
.d-grid     { display: grid; }
.d-none     { display: none !important; }
.d-block    { display: block; }
.d-inline-flex { display: inline-flex; }
.align-center  { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center  { justify-content: center; }
.flex-1     { flex: 1; }
.flex-wrap  { flex-wrap: wrap; }
.gap-2      { gap: var(--space-2); }
.gap-3      { gap: var(--space-3); }
.gap-4      { gap: var(--space-4); }
.gap-6      { gap: var(--space-6); }

.w-full { width: 100%; }
.h-full { height: 100%; }

.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

.p-4  { padding: var(--space-4); }
.p-6  { padding: var(--space-6); }
.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.py-2 { padding-top: var(--space-2); padding-bottom: var(--space-2); }

.text-center  { text-align: center; }
.text-right   { text-align: right; }

.rounded    { border-radius: var(--radius); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.divider {
  height: 1px;
  background: var(--border);
  margin: var(--space-6) 0;
}

/* Grid layouts */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-4); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-4); }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--space-5); }

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(100%); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes slideOutRight {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(110%); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.animate-fade-in { animation: fadeIn 0.4s ease both; }
.animate-pulse   { animation: pulse 2s ease-in-out infinite; }

/* Skeleton loading */
.skeleton {
  background: linear-gradient(90deg, var(--surface-2) 25%, var(--surface-3) 50%, var(--surface-2) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 56px;
    --font-size-3xl: 1.5rem;
    --font-size-2xl: 1.25rem;
  }

  .main-container,
  .main-container-sm {
    padding: var(--space-5) var(--space-4);
  }

  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }

  .nav-hamburger { display: flex; }

  .nav-desktop { display: none; }
  .nav-desktop.open {
    display: flex;
    position: fixed;
    top: var(--nav-height);
    left: 0; right: 0;
    background: var(--nav-bg);
    flex-direction: column;
    padding: var(--space-4);
    border-top: 1px solid rgba(255,255,255,0.10);
    box-shadow: var(--shadow-md);
    z-index: 999;
    animation: fadeIn 0.2s ease;
  }

  .page-header { padding: var(--space-8) var(--space-4); }
  .page-header h1 { font-size: var(--font-size-2xl); }

  .check-group { grid-template-columns: 1fr; }

  .modal { max-height: 95vh; }
  .toast-container { left: var(--space-4); right: var(--space-4); }
  .toast { min-width: unset; max-width: unset; }
}

@media (max-width: 480px) {
  .btn-lg { padding: var(--space-3) var(--space-6); font-size: var(--font-size-base); }
  .card-body { padding: var(--space-4); }
  .stat-value { font-size: var(--font-size-2xl); }
}

/* ============================================================
   SCROLLBAR
   ============================================================ */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--surface-2); }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ============================================================
   PRINT STYLES — for PDF
   ============================================================ */
@media print {
  .navbar, .nav-actions, .btn, .toast-container, .spinner-overlay { display: none !important; }
  .page-wrapper { padding-top: 0; }
  body { background: #FFFFFF; color: #000000; }
  .card { box-shadow: none; border: 1px solid #CCCCCC; }
}

/* ============================================================
   DISABLED MODULE BUTTON — โมดูลที่ backend ยังไม่พร้อม (ดู README.md
   "งานที่เหลือ") ใช้ theme เดิมของ .btn แค่ลด opacity + เปลี่ยน cursor
   ============================================================ */
.btn-module-disabled {
  opacity: 0.45;
  cursor: not-allowed;
  filter: grayscale(35%);
}
.btn-module-disabled:hover {
  opacity: 0.45;
  transform: none !important;
}