/* Global Stylesheet for English AI OS Companion Platform */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');
@import url('m3-tokens.css');

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--md-sys-typescale-font);
  background-color: var(--md-sys-color-surface-dim);
  color: var(--md-sys-color-on-surface);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Glassmorphism Surface Container */
.glass-panel {
  background: rgba(30, 41, 59, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--md-sys-shape-corner-l);
  box-shadow: var(--md-sys-shadow-1);
}

.glass-card {
  background: rgba(30, 41, 59, 0.5);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--md-sys-shape-corner-m);
  transition: all 0.3s ease;
}

.glass-card:hover {
  transform: translateY(-2px);
  border-color: rgba(79, 70, 229, 0.4);
  box-shadow: var(--md-sys-shadow-glow);
}

/* Header & Navbar */
.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 0.75rem 1.5rem;
}

.navbar-container {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  font-size: 1.25rem;
  color: #FFFFFF;
  white-space: nowrap;
  flex-shrink: 0;
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--md-sys-shape-corner-s);
  background: linear-gradient(135deg, var(--md-sys-color-primary), var(--md-sys-color-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFF;
  box-shadow: var(--md-sys-shadow-glow);
  flex-shrink: 0;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
  white-space: nowrap;
}

.nav-link {
  font-weight: 500;
  font-size: 0.92rem;
  color: var(--md-sys-color-on-surface-variant);
  transition: color 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  white-space: nowrap;
}

.nav-link:hover, .nav-link.active {
  color: #FFFFFF;
}

/* Nav Dropdown "Thêm ▾" */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  min-width: 220px;
  background: #0F172A;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.75);
  border: 1px solid rgba(99, 102, 241, 0.35);
  border-radius: 12px;
  padding: 0.5rem 0;
  z-index: 1000;
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown.active .nav-dropdown-menu {
  display: block;
}

.user-badge {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--md-sys-shape-corner-full);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  white-space: nowrap;
  flex-shrink: 0;
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--md-sys-color-primary);
}

/* Badge Pills */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--md-sys-shape-corner-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-free {
  background: rgba(148, 163, 184, 0.15);
  color: #94A3B8;
  border: 1px solid rgba(148, 163, 184, 0.3);
}

.badge-premium {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(217, 119, 6, 0.3));
  color: #FBBF24;
  border: 1px solid rgba(245, 158, 11, 0.5);
  box-shadow: 0 0 10px rgba(245, 158, 11, 0.2);
}

.badge-admin {
  background: rgba(239, 68, 68, 0.2);
  color: #FCA5A5;
  border: 1px solid rgba(239, 68, 68, 0.4);
}

/* Primary Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--md-sys-shape-corner-m);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

.btn-primary {
  background: linear-gradient(135deg, var(--md-sys-color-primary), #6366F1);
  color: #FFFFFF;
  box-shadow: var(--md-sys-shadow-1);
}

.btn-primary:hover {
  opacity: 0.95;
  transform: translateY(-1px);
  box-shadow: var(--md-sys-shadow-glow);
}

.btn-outline {
  background: transparent;
  color: var(--md-sys-color-on-surface);
  border: 1px solid var(--md-sys-color-outline);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: #FFFFFF;
}

/* Layout Container */
.main-content {
  flex: 1;
  max-width: 1280px;
  width: 100%;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

/* Footer */
.app-footer {
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(15, 23, 42, 0.6);
  padding: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--md-sys-color-on-surface-variant);
}

/* Mobile Menu Hamburger Button */
.mobile-menu-btn {
  display: none;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #FFFFFF;
  width: 40px;
  height: 40px;
  border-radius: var(--md-sys-shape-corner-m);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.mobile-menu-btn:hover {
  background: rgba(255, 255, 255, 0.15);
}

/* Mobile Navigation Drawer */
.mobile-nav-drawer {
  display: none;
  flex-direction: column;
  gap: 0.4rem;
  background: #0F172A;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(99, 102, 241, 0.35);
  padding: 1rem 1.5rem;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  z-index: 999;
  box-shadow: 0 20px 40px rgba(0,0,0,0.75);
}

.mobile-nav-drawer.active {
  display: flex;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-weight: 600;
  color: var(--md-sys-color-on-surface);
  transition: background 0.2s ease;
}

.mobile-nav-link:hover, .mobile-nav-link.active {
  background: rgba(255, 255, 255, 0.08);
}

/* Switch to Mobile Hamburger Drawer at 1200px & below */
@media (max-width: 1200px) {
  .nav-menu {
    display: none !important;
  }
  .mobile-menu-btn {
    display: inline-flex !important;
  }
  .main-content {
    padding: 0 1rem;
    margin: 1.25rem auto;
  }
}

/* Avatar Dropdown Item Hover Effects */
.dropdown-link-item {
  transition: background 0.2s ease, color 0.2s ease;
  border-radius: 6px;
  margin: 0 0.5rem;
}

.dropdown-link-item:hover {
  background: rgba(255, 255, 255, 0.08) !important;
}

.user-badge:hover {
  background: rgba(255, 255, 255, 0.12) !important;
  border-color: rgba(255, 255, 255, 0.25) !important;
}