/* ==========================================================================
   NEXUS STUDIO — UI COMPONENTS
   Buttons, cards, badges, modals, form controls, tickers, toast alerts
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Buttons & Links
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.95rem 1.85rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  border-radius: var(--radius-xs);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: #050608;
  border: 1px solid var(--accent-primary);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
}

.btn-secondary:hover {
  border-color: var(--text-primary);
  background-color: rgba(255, 255, 255, 0.05);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  padding: 0.5rem 0.75rem;
}

.btn-ghost:hover {
  color: var(--accent-primary);
}

.btn-sm {
  padding: 0.6rem 1.15rem;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 1.15rem 2.25rem;
  font-size: 1.0625rem;
}

.btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--border-medium);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: scale(1.05);
}

/* Editorial Underline Link */
.editorial-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  color: var(--text-primary);
  position: relative;
  padding-bottom: 2px;
}

.editorial-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background-color: currentColor;
  transform-origin: right;
  transform: scaleX(1);
  transition: transform var(--transition-normal);
}

.editorial-link:hover::after {
  transform-origin: left;
  transform: scaleX(0);
}

.editorial-link:hover {
  color: var(--accent-primary);
}

.editorial-link .arrow-icon {
  transition: transform var(--transition-fast);
}

.editorial-link:hover .arrow-icon {
  transform: translateX(4px) translateY(-2px);
}

/* --------------------------------------------------------------------------
   2. Badges & Indicators
   -------------------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background-color: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--border-subtle);
  width: fit-content;
}

.badge-outline {
  background: transparent;
  border-color: var(--border-medium);
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-success);
  position: relative;
}

.status-dot.pulsing::after {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  border-radius: 50%;
  border: 1px solid var(--color-success);
  animation: pulse-ring 2s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.9); opacity: 0.8; }
  70% { transform: scale(2.2); opacity: 0; }
  100% { transform: scale(2.4); opacity: 0; }
}

/* --------------------------------------------------------------------------
   3. Theme Switcher Pill
   -------------------------------------------------------------------------- */
.theme-switch-wrapper {
  display: inline-flex;
  align-items: center;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 2px;
}

.theme-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  padding: 0;
}

.theme-btn svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
}

.theme-btn:hover {
  color: var(--text-primary);
}

.theme-btn.active {
  background-color: var(--bg-elevated);
  color: var(--accent-primary);
  box-shadow: var(--shadow-sm);
}

/* --------------------------------------------------------------------------
   4. Ticker / Infinite Marquee
   -------------------------------------------------------------------------- */
.marquee-container {
  width: 100%;
  overflow: hidden;
  position: relative;
  white-space: nowrap;
  mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
  padding: var(--space-xl) 0;
}

.marquee-content {
  display: inline-flex;
  align-items: center;
  gap: var(--space-4xl);
  animation: marquee-scroll 35s linear infinite;
}

.marquee-container:hover .marquee-content {
  animation-play-state: paused;
}

@keyframes marquee-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.client-logo-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  opacity: 0.55;
  filter: grayscale(100%);
  transition: all var(--transition-normal);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.client-logo-item:hover {
  opacity: 1;
  filter: grayscale(0%);
  color: var(--accent-primary);
}

.client-logo-item svg {
  height: 28px;
  width: auto;
  fill: currentColor;
}

/* --------------------------------------------------------------------------
   5. Work Portfolio Cards & Rows
   -------------------------------------------------------------------------- */
.project-card {
  display: flex;
  flex-direction: column;
  position: relative;
  border-top: 1px solid var(--border-subtle);
  padding-top: var(--space-xl);
  padding-bottom: var(--space-2xl);
  transition: all var(--transition-normal);
}

.project-card:hover {
  border-color: var(--accent-primary);
}

.project-card-image-wrap {
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-xs);
  position: relative;
  margin-bottom: var(--space-lg);
}

.project-card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-editorial), filter var(--transition-editorial);
  filter: brightness(0.92) contrast(1.05);
}

.project-card:hover .project-card-image {
  transform: scale(1.04);
  filter: brightness(1) contrast(1);
}

.project-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 11, 14, 0.7) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition-normal);
  display: flex;
  align-items: flex-end;
  padding: var(--space-lg);
}

.project-card:hover .project-card-overlay {
  opacity: 1;
}

.project-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: var(--space-xs);
}

.project-index {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-primary);
}

.project-year {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.project-title {
  font-size: clamp(1.5rem, 2.2vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-xs);
  transition: color var(--transition-fast);
}

.project-card:hover .project-title {
  color: var(--accent-primary);
}

.project-industry {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.project-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   6. Accordions (Services & FAQ)
   -------------------------------------------------------------------------- */
.accordion-list {
  border-top: 1px solid var(--border-medium);
}

.accordion-item {
  border-bottom: 1px solid var(--border-subtle);
  transition: background-color var(--transition-fast);
}

.accordion-item.is-open {
  background-color: rgba(255, 255, 255, 0.02);
  border-bottom-color: var(--border-medium);
}

.accordion-trigger {
  width: 100%;
  padding: var(--space-xl) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  background: none;
  border: none;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.accordion-trigger-left {
  display: flex;
  align-items: baseline;
  gap: var(--space-xl);
  flex: 1;
}

.accordion-num {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--accent-primary);
  min-width: 40px;
}

.accordion-title {
  font-size: clamp(1.35rem, 2vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.accordion-summary-tag {
  display: none;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
}

@media (min-width: 768px) {
  .accordion-summary-tag {
    display: inline-block;
  }
}

.accordion-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border-medium);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-normal), border-color var(--transition-normal), background-color var(--transition-normal);
  flex-shrink: 0;
}

.accordion-item.is-open .accordion-icon {
  transform: rotate(45deg);
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #000000;
}

.accordion-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
  opacity: 0;
}

.accordion-item.is-open .accordion-panel {
  opacity: 1;
}

.accordion-panel-content {
  padding-bottom: var(--space-2xl);
  padding-left: 0;
}

@media (min-width: 768px) {
  .accordion-panel-content {
    padding-left: calc(40px + var(--space-xl));
  }
}

/* --------------------------------------------------------------------------
   7. Form Controls & Validation
   -------------------------------------------------------------------------- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-xl);
  position: relative;
}

.form-label {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

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

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xs);
  padding: 0.95rem 1.25rem;
  color: var(--text-primary);
  font-size: 1rem;
  font-family: var(--font-sans);
  transition: border-color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--accent-primary);
  background-color: var(--bg-elevated);
  box-shadow: 0 0 0 1px var(--accent-primary);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}

.form-textarea {
  resize: vertical;
  min-height: 140px;
}

.form-group.has-error .form-input,
.form-group.has-error .form-textarea,
.form-group.has-error .form-select {
  border-color: var(--color-error);
}

.form-error-msg {
  font-size: 0.8125rem;
  color: var(--color-error);
  display: none;
  margin-top: 0.25rem;
}

.form-group.has-error .form-error-msg {
  display: block;
}

/* Chip Selectors (Budget, Timeline, Project Type) */
.chip-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: 0.25rem;
}

.chip-option {
  cursor: pointer;
  position: relative;
}

.chip-option input[type="radio"],
.chip-option input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.chip-label {
  display: inline-flex;
  align-items: center;
  padding: 0.65rem 1.15rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xs);
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  user-select: none;
}

.chip-option input:checked + .chip-label {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #000000;
  font-weight: 600;
}

.chip-option:hover .chip-label {
  border-color: var(--text-primary);
  color: var(--text-primary);
}

/* Custom Checkbox */
.checkbox-wrap {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  cursor: pointer;
  user-select: none;
}

.checkbox-wrap input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border: 1px solid var(--border-medium);
  border-radius: 2px;
  background: var(--bg-tertiary);
  cursor: pointer;
  margin-top: 2px;
  display: grid;
  place-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.checkbox-wrap input[type="checkbox"]:checked {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
}

.checkbox-wrap input[type="checkbox"]:checked::before {
  content: "✓";
  color: #000000;
  font-size: 14px;
  font-weight: 900;
}

.checkbox-label-text {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* File Upload Simulation Box */
.file-upload-zone {
  border: 2px dashed var(--border-medium);
  border-radius: var(--radius-sm);
  padding: var(--space-xl);
  text-align: center;
  background-color: var(--bg-tertiary);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.file-upload-zone.dragover,
.file-upload-zone:hover {
  border-color: var(--accent-primary);
  background-color: rgba(212, 255, 63, 0.03);
}

.file-upload-icon {
  width: 44px;
  height: 44px;
  margin: 0 auto var(--space-sm);
  stroke: var(--accent-primary);
}

.file-list {
  margin-top: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.file-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  font-size: 0.875rem;
}

.file-item-info {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-item-remove {
  color: var(--color-error);
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
  font-size: 1.1rem;
}

.upload-progress-bar {
  width: 100%;
  height: 4px;
  background: var(--border-subtle);
  border-radius: 2px;
  margin-top: 6px;
  overflow: hidden;
}

.upload-progress-fill {
  height: 100%;
  background: var(--accent-primary);
  width: 0%;
  transition: width 0.3s ease;
}

/* --------------------------------------------------------------------------
   8. Modals & Overlay Drawers
   -------------------------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 6, 8, 0.85);
  backdrop-filter: blur(12px);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

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

.modal-container {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  width: 100%;
  max-width: 680px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  padding: var(--space-2xl);
  transform: translateY(20px) scale(0.98);
  transition: transform var(--transition-normal);
  box-shadow: var(--shadow-lg);
}

.modal-overlay.active .modal-container {
  transform: translateY(0) scale(1);
}

.modal-close-btn {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border-medium);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.modal-close-btn:hover {
  color: var(--text-primary);
  border-color: var(--text-primary);
  background-color: var(--bg-tertiary);
}

/* --------------------------------------------------------------------------
   9. Toast Notifications
   -------------------------------------------------------------------------- */
.toast-container {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  z-index: 100000;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  min-width: 320px;
  max-width: 440px;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-medium);
  border-left: 4px solid var(--accent-primary);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-xs);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  transform: translateX(100%);
  opacity: 0;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
}

.toast.toast-show {
  transform: translateX(0);
  opacity: 1;
}

.toast-success { border-left-color: var(--color-success); }
.toast-error { border-left-color: var(--color-error); }
.toast-info { border-left-color: var(--accent-primary); }

.toast-title {
  font-weight: 700;
  font-size: 0.9375rem;
  margin-bottom: 2px;
}

.toast-message {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.toast-close {
  margin-left: auto;
  color: var(--text-muted);
  cursor: pointer;
}

.toast-close:hover {
  color: var(--text-primary);
}

/* Draft Banner prompt */
.draft-alert-banner {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-accent);
  padding: 1rem 1.5rem;
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.draft-alert-banner p {
  font-size: 0.9375rem;
}