/* DiplomaStudy - Components v2 (Premium) */

/* ═══════════════════════════════════════════
   CARD (Enhanced with hover lift)
   ═══════════════════════════════════════════ */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-xs);
  transition: 
    transform var(--transition-smooth),
    box-shadow var(--transition-smooth),
    border-color var(--transition-smooth);
}

.card-interactive {
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.card-interactive:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-sage);
}

.card-interactive:active {
  transform: scale(0.985);
  transition-duration: 0.1s;
}

.card-highlight {
  background: linear-gradient(135deg, rgba(122, 155, 122, 0.08), rgba(28, 62, 44, 0.05));
  border-color: var(--color-sage);
  box-shadow: 0 4px 16px rgba(28, 62, 44, 0.08);
}

/* ═══════════════════════════════════════════
   BUTTONS (Enhanced with ripple + glow)
   ═══════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 600;
  font-family: inherit;
  transition: 
    background-color var(--transition-fast),
    transform var(--transition-spring),
    box-shadow var(--transition-fast);
  border: 1px solid transparent;
  white-space: nowrap;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
}

.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(255,255,255,0.2) 0%, transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-fast);
  pointer-events: none;
}

.btn:hover::before { opacity: 1; }

.btn-primary {
  background: var(--grad-forest);
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(28, 62, 44, 0.25);
}
.btn-primary:hover {
  box-shadow: 0 6px 18px rgba(28, 62, 44, 0.35);
  transform: translateY(-1px);
}
.btn-primary:active {
  transform: scale(0.97);
  box-shadow: 0 2px 6px rgba(28, 62, 44, 0.3);
}

.btn-secondary {
  background-color: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn-secondary:hover {
  background-color: var(--color-surface-hover);
  border-color: var(--color-sage);
}
.btn-secondary:active {
  transform: scale(0.97);
}

.btn-outline {
  border-color: var(--color-forest);
  color: var(--color-forest);
  background: transparent;
}
.btn-outline:hover {
  background: var(--color-forest-soft);
}

.btn-danger {
  background: linear-gradient(135deg, #DC2626, #B91C1C);
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(185, 28, 28, 0.25);
}
.btn-danger:active {
  transform: scale(0.97);
}

.btn-sm {
  padding: 6px 12px;
  font-size: var(--font-size-xs);
  border-radius: var(--radius-sm);
}
.btn-lg {
  padding: 14px 24px;
  font-size: var(--font-size-md);
  border-radius: var(--radius-lg);
  width: 100%;
}
.btn-block { width: 100%; }

/* ═══════════════════════════════════════════
   SEARCH BAR (Enhanced with focus glow)
   ═══════════════════════════════════════════ */
.search-container {
  position: relative;
  width: 100%;
  margin-bottom: 16px;
}

.search-input {
  width: 100%;
  height: 46px;
  padding: 0 42px 0 44px;
  background-color: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-base);
  color: var(--color-text);
  outline: none;
  transition: all var(--transition-smooth);
  font-family: inherit;
}

.search-input:focus {
  border-color: var(--color-forest);
  box-shadow: 0 0 0 4px var(--color-forest-soft), 0 4px 12px rgba(28, 62, 44, 0.1);
  background-color: var(--color-surface);
}

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

.search-input:focus + .search-icon,
.search-container:focus-within .search-icon {
  color: var(--color-forest);
}

.search-clear-btn {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-dim);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  background: transparent;
  border: none;
}
.search-clear-btn:hover {
  background: var(--color-surface-hover);
  color: var(--color-text);
}

/* ═══════════════════════════════════════════
   BADGES (Enhanced)
   ═══════════════════════════════════════════ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 9px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  transition: transform var(--transition-spring);
}
.badge:hover { transform: scale(1.05); }

.badge-forest { background-color: var(--color-forest-soft); color: var(--color-forest); }
.badge-sage { background-color: var(--color-sage-light); color: var(--color-sage-dark); }
.badge-accent { background-color: var(--color-accent-light); color: var(--color-accent); }
.badge-success { background-color: var(--color-success-bg); color: var(--color-success); }
.badge-warning { background-color: var(--color-warning-bg); color: var(--color-warning); }
.badge-danger { background-color: var(--color-danger-bg); color: var(--color-danger); }

/* ═══════════════════════════════════════════
   PROGRESS BAR (Enhanced with animation)
   ═══════════════════════════════════════════ */
.progress-bar-track {
  width: 100%;
  height: 8px;
  background-color: var(--color-border-subtle);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.progress-bar-fill {
  height: 100%;
  background: var(--grad-forest);
  border-radius: var(--radius-full);
  transition: width 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  overflow: hidden;
}

.progress-bar-fill::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.3) 50%,
    transparent 100%
  );
  animation: shimmer 2s infinite;
}

/* ═══════════════════════════════════════════
   FILTER PILLS (Enhanced)
   ═══════════════════════════════════════════ */
.filter-pill {
  padding: 7px 15px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 700;
  background-color: var(--color-surface);
  border: 1.5px solid var(--color-border);
  color: var(--color-text-muted);
  white-space: nowrap;
  transition: all var(--transition-spring);
  cursor: pointer;
  font-family: inherit;
  -webkit-tap-highlight-color: transparent;
}

.filter-pill:hover {
  border-color: var(--color-sage);
  color: var(--color-forest);
}

.filter-pill.active {
  background: var(--grad-forest);
  color: #FFFFFF;
  border-color: var(--color-forest);
  box-shadow: 0 4px 12px rgba(28, 62, 44, 0.2);
  transform: translateY(-1px);
}

.filter-pill:active {
  transform: scale(0.94);
}

/* ═══════════════════════════════════════════
   EMPTY STATE (Enhanced with illustration)
   ═══════════════════════════════════════════ */
.empty-state {
  text-align: center;
  padding: 44px 20px;
  background-color: var(--color-surface);
  border: 1.5px dashed var(--color-border);
  border-radius: var(--radius-xl);
  margin: 16px 0;
  animation: fadeIn 0.4s ease;
}

.empty-state-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-forest-soft), var(--color-sage-light));
  color: var(--color-forest);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 14px auto;
  font-size: 28px;
  animation: float 3s ease-in-out infinite;
}

.empty-state-title {
  font-size: var(--font-size-md);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 6px;
  letter-spacing: -0.2px;
}

.empty-state-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  max-width: 280px;
  margin: 0 auto 16px auto;
  line-height: 1.6;
}

/* ═══════════════════════════════════════════
   MODAL (Enhanced with slide-up)
   ═══════════════════════════════════════════ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(16, 23, 18, 0.6);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 100;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  animation: fadeIn 0.2s ease forwards;
}

.modal-content {
  background-color: var(--color-surface);
  width: 100%;
  max-width: var(--max-content-width);
  border-radius: 24px 24px 0 0;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 -8px 40px rgba(0, 0, 0, 0.2);
  animation: slideUp 0.35s cubic-bezier(0.34, 1.2, 0.64, 1) forwards;
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: var(--font-size-md);
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.2px;
}

.modal-body {
  padding: 20px;
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  padding: 12px 20px calc(12px + var(--safe-bottom));
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: 10px;
}

/* ═══════════════════════════════════════════
   TOAST (Enhanced)
   ═══════════════════════════════════════════ */
#toast-container {
  position: fixed;
  bottom: calc(var(--bottom-nav-height) + 16px);
  left: 50%;
  transform: translateX(-50%);
  width: 90%;
  max-width: 400px;
  z-index: 150;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  color: var(--color-text);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 14px 18px;
  box-shadow: var(--shadow-lg);
  font-size: var(--font-size-sm);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  pointer-events: auto;
  animation: slideUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

/* ═══════════════════════════════════════════
   SPINNER (Enhanced)
   ═══════════════════════════════════════════ */
.spinner {
  width: 34px;
  height: 34px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-forest);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 20px auto;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ═══════════════════════════════════════════
   ICON BUTTON (NEW)
   ═══════════════════════════════════════════ */
.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition-spring);
  font-family: inherit;
  -webkit-tap-highlight-color: transparent;
}

.icon-btn:hover {
  background: var(--color-forest-soft);
  border-color: var(--color-forest);
  color: var(--color-forest);
  transform: scale(1.05);
}

.icon-btn:active {
  transform: scale(0.92);
}