/* ==============================================================================
   PORTAL ỨNG DỤNG - CÔNG TY TNHH ĐÀO TẠO, KỸ THUẬT & THƯƠNG MẠI LÂM GIA
   Phong cách: Modern Enterprise Application Portal
   ============================================================================== */

:root {
  --primary: #1d4ed8;
  --primary-hover: #1e40af;
  --primary-light: #eff6ff;
  --primary-border: #bfdbfe;
  --secondary: #0284c7;
  
  --bg-body: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-light: #64748b;
  
  --border-color: #e2e8f0;
  --border-focus: #1d4ed8;
  
  --success: #047857;
  --success-bg: #ecfdf5;
  --success-border: #a7f3d0;
  
  --warning: #92400e;
  --warning-bg: #fefce8;
  --warning-border: #fef08a;
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.07), 0 4px 6px -2px rgba(15, 23, 42, 0.03);
  --shadow-hover: 0 10px 15px -3px rgba(15, 23, 42, 0.07), 0 4px 6px -2px rgba(15, 23, 42, 0.03);
  
  --transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* Skip link hỗ trợ trợ năng bàn phím */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  background: var(--primary);
  color: #ffffff;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 1000;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 16px;
}

/* Browser surfaces: selection, focus & scrollbar */
::selection {
  background-color: #bfdbfe;
  color: #1e3a8a;
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #94a3b8;
}

/* Reset cơ bản */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* Container chung */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Banner Hệ Thống - Phong cách trầm ấm, doanh nghiệp */
.site-header {
  background: linear-gradient(180deg, #0f172a 0%, #172554 100%);
  color: #ffffff;
  padding: 40px 0 48px;
  position: relative;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  z-index: 2;
}

/* Logo & Branding */
.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 16px;
}

.brand-logo-img {
  width: 76px;
  height: 76px;
  object-fit: contain;
  background-color: #ffffff;
  border-radius: 50%;
  padding: 4px;
  background-color: #ffffff;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  flex-shrink: 0;
}

.brand-titles {
  text-align: left;
}

.brand-company {
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #e2e8f0;
  font-weight: 600;
  margin-bottom: 3px;
}

.brand-unit {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.system-title {
  font-size: 1.85rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.01em;
  margin-top: 14px;
  text-transform: uppercase;
}

.system-description {
  font-size: 1rem;
  color: #cbd5e1;
  max-width: 640px;
  margin-top: 6px;
  font-weight: 400;
}

/* Control Toolbar & Search */
.portal-controls {
  margin-top: -28px;
  position: relative;
  z-index: 10;
  margin-bottom: 36px;
}

.controls-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: 16px 24px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.search-box {
  position: relative;
  flex: 1;
  min-width: 280px;
}

.search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
  pointer-events: none;
  display: flex;
}

.search-input {
  width: 100%;
  padding: 12px 44px 12px 48px;
  font-size: 0.95rem;
  font-family: inherit;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: #f8fafc;
  color: var(--text-main);
  outline: none;
  transition: var(--transition);
}

.search-input:focus {
  background-color: #ffffff;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.15);
}

.search-clear-btn {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: #e2e8f0;
  border: none;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 13px;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.search-clear-btn.visible {
  opacity: 1;
  visibility: visible;
}

.search-clear-btn:hover {
  background: #cbd5e1;
  color: var(--text-main);
}

/* Stats Badges & Filter Tabs */
.stats-and-filters {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.stat-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  min-height: 38px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  background-color: #f1f5f9;
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  cursor: pointer;
  user-select: none;
}

.stat-pill:hover {
  background-color: #e2e8f0;
  color: var(--text-main);
}

.stat-pill.active {
  background-color: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.stat-pill .count {
  background: rgba(15, 23, 42, 0.08);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.stat-pill.active .count {
  background: #ffffff;
  color: var(--primary);
  font-weight: 700;
}

/* Main Content & Section Layout */
.main-content {
  flex: 1;
  padding-bottom: 60px;
}

.section-block {
  margin-bottom: 48px;
}

.section-block.hidden {
  display: none;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.section-title-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-title-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.badge-admin {
  color: #1d4ed8;
}

.badge-teacher {
  color: #0f766e;
}

.badge-student {
  color: #047857;
}

.section-count-tag {
  font-size: 0.85rem;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: #f1f5f9;
  color: var(--text-muted);
  font-weight: 600;
  border: 1px solid var(--border-color);
}

/* Application Cards Grid */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

@media (min-width: 1200px) {
  .apps-grid.grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Single Application Card */
.app-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
}

.app-card:hover {
  transform: translateY(-2px);
  border-color: #cbd5e1;
  box-shadow: var(--shadow-hover);
}

.app-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 18px;
}

.app-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* Icon Theme Variations - Màu sắc chuẩn mực, điềm đạm */
.theme-blue { background-color: #eff6ff; color: #1d4ed8; }
.theme-indigo { background-color: #f1f5f9; color: #1e3a8a; }
.theme-violet { background-color: #f1f5f9; color: #334155; }
.theme-emerald { background-color: #ecfdf5; color: #047857; }
.theme-amber { background-color: #fefce8; color: #854d0e; }
.theme-rose { background-color: #f8fafc; color: #334155; }
.theme-sky { background-color: #f0f9ff; color: #0369a1; }
.theme-teal { background-color: #f0fdf4; color: #0f766e; }
.theme-cyan { background-color: #f0fdfa; color: #0f766e; }

.app-badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background-color: #f1f5f9;
  color: var(--text-muted);
  border: 1px solid var(--border-color);
}

.app-card-body {
  flex: 1;
  margin-bottom: 22px;
}

.app-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.4;
}

.app-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* Card Footer & Action Button */
.app-card-footer {
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 600;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.status-ready {
  color: var(--success);
}
.status-ready .status-dot {
  background-color: var(--success);
}

.status-pending {
  color: var(--warning);
}
.status-pending .status-dot {
  background-color: #d97706;
}

.btn-launch {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 10px 18px;
  font-size: 0.88rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-launch.active {
  background-color: var(--primary);
  color: #ffffff;
}

.btn-launch.active:hover {
  background-color: var(--primary-hover);
}

.btn-launch.active svg {
  transition: transform 0.2s ease;
}

.btn-launch.active:hover svg {
  transform: translateX(3px);
}

.btn-launch.disabled {
  background-color: #f1f5f9;
  color: var(--text-light);
  border: 1px solid var(--border-color);
  cursor: not-allowed;
  pointer-events: none;
  box-shadow: none;
}

/* Nút kép dành cho ứng dụng v1 & v2 */
.btn-group-dual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  width: 100%;
}

.btn-dual {
  padding: 9px 8px;
  font-size: 0.82rem;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.btn-dual-v1 {
  background-color: var(--primary);
  color: #ffffff;
}

.btn-dual-v1:hover {
  background-color: var(--primary-hover);
}

.btn-dual-v2 {
  background-color: #334155;
  color: #ffffff;
}

.btn-dual-v2:hover {
  background-color: #1e293b;
}

@media (max-width: 380px) {
  .btn-group-dual {
    grid-template-columns: 1fr;
  }
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 64px 20px;
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  border: 1px dashed var(--border-color);
  max-width: 540px;
  margin: 30px auto;
}

.empty-icon {
  width: 72px;
  height: 72px;
  background-color: #eff6ff;
  color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
}

.empty-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.empty-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.btn-reset {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 20px;
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  background-color: var(--primary);
  color: #ffffff;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn-reset:hover {
  background-color: var(--primary-hover);
}

/* Footer Doanh Nghiệp */
.site-footer {
  background-color: #0f172a;
  color: #94a3b8;
  padding: 48px 0 28px;
  border-top: 1px solid #1e293b;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 36px;
}

.footer-col-brand .footer-logo-title {
  color: #ffffff;
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.footer-col-brand .footer-company {
  color: #60a5fa;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.footer-col-brand .footer-text {
  font-size: 0.88rem;
  line-height: 1.6;
  max-width: 420px;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.footer-links, .footer-contact {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.88rem;
}

.footer-links li a {
  color: #94a3b8;
  text-decoration: none;
  transition: var(--transition);
}

.footer-links li a:hover {
  color: #38bdf8;
  padding-left: 4px;
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.footer-contact a {
  color: #e2e8f0;
  text-decoration: none;
  transition: var(--transition);
}

.footer-contact a:hover {
  color: #38bdf8;
  text-decoration: underline;
}

.footer-contact svg {
  color: #38bdf8;
  flex-shrink: 0;
  margin-top: 2px;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid #1e293b;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  font-size: 0.82rem;
}

.footer-bottom a {
  color: #38bdf8;
  text-decoration: none;
}

/* Simulation banner for testing */
/* Banner thông báo trạng thái kiểm thử */
.dev-banner {
  background: var(--warning-bg);
  border: 1px solid var(--warning-border);
  color: var(--warning);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  font-size: 0.82rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 24px;
}

.dev-banner-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.dev-toggle-btn {
  background: #ffffff;
  color: var(--warning);
  border: 1px solid #d97706;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.dev-toggle-btn:hover {
  background: #fef3c7;
}

.dev-toggle-btn.is-simulating {
  color: var(--success);
  border-color: var(--success);
}

.dev-toggle-btn.is-simulating:hover {
  background: #ecfdf5;
}

/* Highlight search matches & text */
mark.highlight {
  background-color: #fef08a;
  color: #854d0e;
  padding: 0 2px;
  border-radius: 3px;
}

.empty-query-highlight {
  font-weight: 700;
  color: var(--primary);
}

/* ==============================================================================
   RESPONSIVE DESIGN (Desktop, Laptop, Tablet, Mobile)
   ============================================================================== */

/* Laptops & Tablets (< 1024px) */
@media (max-width: 1024px) {
  .apps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .footer-col-brand {
    grid-column: span 2;
  }
  
  .system-title {
    font-size: 1.85rem;
  }
}

/* Mobile & Small Tablets (< 768px) */
@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
  
  .site-header {
    padding: 32px 0 40px;
  }
  
  .brand-wrapper {
    flex-direction: column;
    text-align: center;
    gap: 10px;
  }
  
  .brand-titles {
    text-align: center;
  }
  
  .system-title {
    font-size: 1.45rem;
  }
  
  .system-description {
    font-size: 0.92rem;
  }
  
  .portal-controls {
    margin-top: -20px;
  }
  
  .controls-card {
    padding: 16px;
    flex-direction: column;
    align-items: stretch;
  }
  
  .search-box {
    min-width: 100%;
  }
  
  .stats-and-filters {
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 4px;
  }
  
  .apps-grid {
    grid-template-columns: 1fr; /* 1 cột trên mobile */
    gap: 16px;
  }
  
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .footer-col-brand {
    grid-column: span 1;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 8px;
  }
  
  .dev-banner {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ==============================================================================
   ACCESSIBILITY: PREFERS-REDUCED-MOTION
   ============================================================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .app-card:hover {
    transform: none !important;
  }
  .btn-launch.active:hover svg {
    transform: none !important;
  }
}