/* ═══ 1. FEDU BRAND FONT DECLARATIONS ═══ */
@font-face {
  font-family: 'FD Aeonik Extended';
  src: url('https://font.fedu.vn/fonts/FDAeonikExtended-Bold.woff2?v=20260911b') format('woff2'),
       local('FD Aeonik Extended Bold');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'FD Aeonik';
  src: url('https://font.fedu.vn/fonts/FDAeonikExtended-SemiBold.woff2?v=20260911b') format('woff2'),
       local('FD Aeonik SemiBold');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'FD Aeonik';
  src: url('./fonts/FDAeonikRegular.ttf') format('truetype'),
       local('FD Aeonik Regular');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Tiempos Text';
  src: local('FDTiemposText-Regular'),
       local('Tiempos Text Regular'),
       local('TiemposText-Regular'),
       url('https://font.fedu.vn/fonts/FDTiemposText-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Tiempos Text';
  src: local('FDTiemposText-Medium'),
       local('Tiempos Text Medium'),
       local('TiemposText-Medium'),
       url('https://font.fedu.vn/fonts/FDTiemposText-Medium.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

/* ═══ 2. SWISS DESIGN SYSTEM TOKENS ═══ */
:root {
  /* Typography System */
  --font-display-short: 'FD Aeonik Extended', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display-long: 'FD Aeonik', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Colors - Zebra Striping & Slate Theme */
  --cl-bg-header:   #07090e;     /* Deepest Onyx */
  --cl-bg-tint:     #f8fafc;     /* Slate 50 */
  --cl-bg-light:    #ffffff;
  --cl-card:        #ffffff;
  --cl-text-base:   #090d16;     /* Slate 950 */
  --cl-text-body:   #0f172a;     /* Slate 900 */
  --cl-text-muted:  #475569;     /* Slate 600 */
  --cl-text-faint:  #94a3b8;     /* Slate 400 */
  --cl-accent:      #1a73e8;     /* Royal Blue */
  --cl-accent-led:  #eab308;     /* LED Amber Gold */
  --primary-color:  #07090e;     /* Swiss Onyx */
  
  --cl-line:        rgba(0, 0, 0, 0.08);
  --cl-line-dark:   rgba(255, 255, 255, 0.1);
  --cl-line-strong: rgba(255, 255, 255, 0.2);

  /* Apple Motion Curves */
  --apple-spring: cubic-bezier(0.25, 1, 0.35, 1.05);
  --apple-ease:   cubic-bezier(0.16, 1, 0.3, 1);
}

body {
  background-color: var(--cl-bg-tint);
  margin: 0;
  padding: 0;
  font-family: var(--font-display-long);
  color: var(--cl-text-base);
  -webkit-font-smoothing: antialiased;
}

/* ═══ 3. TYPOGRAPHY CLASSES ═══ */
.title-short {
  font-family: var(--font-display-short);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: -0.01em;
}

.title-long {
  font-family: var(--font-display-long);
  font-weight: 600;
}

.font-mono {
  font-family: var(--font-mono);
}

.cl-body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--cl-text-body);
  font-size: 15.5px;
  line-height: 1.75;
}

.editorial-hook {
  font-family: var(--font-body);
  font-style: italic;
  font-weight: 500;
  color: var(--cl-text-base);
  border-left: 3px solid var(--cl-accent-led);
  padding-left: 1rem;
}

/* ═══ 4. HEADER & PILLS ═══ */
.brand-header {
  background-color: var(--cl-bg-header);
  border-bottom: 1px solid var(--cl-line-dark);
}

.cl-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--cl-line-strong);
  color: var(--cl-accent-led);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  position: relative;
}

.status-dot.active {
  background-color: #22c55e;
  box-shadow: 0 0 10px rgba(34, 197, 94, 0.8);
}
.status-dot.active::after {
  content: '';
  position: absolute;
  top: -2px; left: -2px; right: -2px; bottom: -2px;
  border-radius: 50%;
  border: 1px solid rgba(34, 197, 94, 0.6);
  animation: pulse-ring 2s infinite;
}

.status-dot.error {
  background-color: #ef4444;
  box-shadow: 0 0 10px rgba(239, 68, 68, 0.8);
}

@keyframes pulse-ring {
  0% { transform: scale(1); opacity: 1; }
  100% { transform: scale(2.2); opacity: 0; }
}

/* ═══ 5. ZEBRA STRIPING ═══ */
.cl-zebra--light {
  background-color: var(--cl-bg-light);
}

.cl-zebra--tint {
  background-color: var(--cl-bg-tint);
  border-bottom: 1px solid var(--cl-line);
}

/* ═══ 6. TABS NAVIGATION ═══ */
.tab-nav {
  display: flex;
  gap: 0.6rem;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 0.35rem 0;
}
.tab-nav::-webkit-scrollbar {
  display: none;
}
.tab-item {
  padding: 0.55rem 1.15rem;
  border-radius: 9999px;
  cursor: pointer;
  white-space: nowrap;
  font-family: var(--font-display-long);
  font-weight: 600;
  font-size: 13.5px;
  color: var(--cl-text-muted);
  background-color: var(--cl-bg-light);
  border: 1px solid rgba(0, 0, 0, 0.08);
  transition: all 0.22s var(--apple-ease);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.tab-item:hover {
  background-color: #f1f5f9;
  color: var(--cl-text-base);
  border-color: rgba(0, 0, 0, 0.16);
  transform: translateY(-1px);
}
.tab-item.active {
  background-color: var(--cl-bg-header);
  color: #ffffff;
  border-color: var(--cl-bg-header);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* ═══ 7. KANBAN BOARD ═══ */
.kanban-board {
  display: flex;
  overflow-x: auto;
  height: 100%;
  gap: 1.25rem;
  padding: 0.5rem 0;
}

.kanban-col {
  flex: 0 0 320px;
  background: #f1f5f9;
  border-radius: 16px;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.kanban-card {
  background: #ffffff;
  border-radius: 12px;
  padding: 1rem;
  margin-bottom: 0.85rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
  border: 1px solid rgba(0, 0, 0, 0.06);
  cursor: grab;
  transition: transform 0.25s var(--apple-spring), box-shadow 0.25s var(--apple-ease), border-color 0.2s ease;
}
.kanban-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px -3px rgba(0, 0, 0, 0.08);
  border-color: rgba(234, 179, 8, 0.5); /* Amber accent */
}
.kanban-card:active {
  cursor: grabbing;
  transform: scale(0.98);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 0.2rem 0.6rem;
  border-radius: 9999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  font-family: var(--font-mono);
}
.badge-yellow { background: #fef9c3; color: #854d0e; border: 1px solid #fef08a; }
.badge-blue { background: #dbeafe; color: #1e40af; border: 1px solid #bfdbfe; }
.badge-green { background: #dcfce7; color: #166534; border: 1px solid #bbf7d0; }
.badge-purple { background: #f3e8ff; color: #6b21a8; border: 1px solid #e9d5ff; }

/* ═══ 8. DRAWER & MODAL ═══ */
.drawer-overlay {
  background: rgba(7, 9, 14, 0.6);
  backdrop-filter: blur(6px);
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 40;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--apple-ease);
}
.drawer-overlay.open {
  opacity: 1;
  pointer-events: auto;
}
.drawer {
  position: fixed;
  top: 0; right: 0; bottom: 0;
  width: 100%;
  max-width: 520px;
  background: #ffffff;
  z-index: 50;
  box-shadow: -12px 0 40px rgba(0, 0, 0, 0.2);
  transform: translateX(100%);
  transition: transform 0.4s var(--apple-spring);
  display: flex;
  flex-direction: column;
}
.drawer.open {
  transform: translateX(0);
}

/* ═══ 9. BUTTONS ═══ */
.btn-fedu {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 13.5px;
  transition: all 0.2s var(--apple-ease);
  cursor: pointer;
  border: 1px solid transparent;
}
.btn-fedu:hover {
  transform: translateY(-1px);
}
.btn-fedu-primary {
  background-color: var(--cl-bg-header);
  color: #ffffff;
}
.btn-fedu-primary:hover {
  background-color: #1a2233;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
}

/* Mobile adjustments */
@media (max-width: 768px) {
  .kanban-board {
    flex-direction: column;
    height: auto;
  }
  .kanban-col {
    flex: auto;
    width: 100%;
    margin-bottom: 1rem;
  }
  .tab-item {
    font-size: 12.5px;
    padding: 0.45rem 0.9rem;
  }
}