/* 
  styles.css - Design System & UI Styling for RAFTAAR Pipeline Engine
*/

:root[data-theme="dark"] {
  --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
  --card-bg: rgba(30, 41, 59, 0.7);
  --card-border: rgba(255, 255, 255, 0.1);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-glow: rgba(99, 102, 241, 0.35);
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.15);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.15);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.15);
  --row-bg: rgba(15, 23, 42, 0.5);
  --row-border: rgba(255, 255, 255, 0.05);
  --shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
  --dropzone-bg: rgba(99, 102, 241, 0.05);
  --dropzone-border: rgba(99, 102, 241, 0.3);
}

:root[data-theme="light"] {
  --bg-gradient: linear-gradient(135deg, #f1f5f9 0%, #e0e7ff 50%, #f1f5f9 100%);
  --card-bg: rgba(255, 255, 255, 0.85);
  --card-border: rgba(99, 102, 241, 0.15);
  --text-main: #0f172a;
  --text-muted: #64748b;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-glow: rgba(79, 70, 229, 0.25);
  --success: #059669;
  --success-bg: rgba(5, 150, 105, 0.12);
  --warning: #d97706;
  --warning-bg: rgba(217, 119, 6, 0.12);
  --danger: #dc2626;
  --danger-bg: rgba(220, 38, 38, 0.12);
  --row-bg: rgba(248, 250, 252, 0.9);
  --row-border: rgba(226, 232, 240, 0.8);
  --shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --dropzone-bg: rgba(79, 70, 229, 0.03);
  --dropzone-border: rgba(79, 70, 229, 0.4);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease, opacity 0.25s ease, filter 0.25s ease;
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-gradient);
  min-height: 100vh;
  color: var(--text-main);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1rem;
}

.app-container {
  width: 100%;
  max-width: 1100px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  padding: 1.5rem 2rem;
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  box-shadow: var(--shadow);
}

.brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, #6366f1, #a855f7);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 1.5rem;
  box-shadow: 0 4px 14px var(--accent-glow);
}

.brand-text h1 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(90deg, #6366f1, #a855f7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-text p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.theme-toggle {
  background: var(--row-bg);
  border: 1px solid var(--card-border);
  border-radius: 30px;
  padding: 5px;
  display: flex;
  gap: 4px;
}

.theme-btn {
  padding: 6px 14px;
  border-radius: 20px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
}

.theme-btn.active {
  background: var(--accent);
  color: white;
  box-shadow: 0 2px 10px var(--accent-glow);
}

.card {
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: 24px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow);
}

.dropzone {
  border: 2px dashed var(--dropzone-border);
  background: var(--dropzone-bg);
  border-radius: 18px;
  padding: 3rem 1.5rem;
  text-align: center;
  cursor: pointer;
  position: relative;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent);
  background: rgba(99, 102, 241, 0.08);
}

.dropzone input[type="file"] {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  opacity: 0;
  cursor: pointer;
}

.drop-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.drop-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.drop-hint {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Action Controls Bar */
.action-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.25rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.bar-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.bar-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.format-selector {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.format-selector label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
}

.select-input {
  background: var(--row-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 0.65rem 1rem;
  color: var(--text-main);
  font-size: 0.9rem;
  font-weight: 600;
  outline: none;
  cursor: pointer;
}

.select-input:focus {
  border-color: var(--accent);
}

.stats {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 500;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  color: white;
  border: none;
  padding: 0.85rem 2rem;
  border-radius: 14px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 4px 16px var(--accent-glow);
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-glow);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}

/* Settings & Marking Box Styling */
.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.25rem;
  margin-top: 1rem;
}

.setting-box {
  background: var(--row-bg);
  border: 1px solid var(--row-border);
  border-radius: 18px;
  padding: 1.25rem 1.5rem;
  position: relative;
  overflow: hidden;
}

.setting-box.disabled-box {
  opacity: 0.35;
  filter: blur(1px) grayscale(0.8);
  pointer-events: none;
  border-color: rgba(255, 255, 255, 0.05);
  user-select: none;
}

.setting-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.setting-title {
  font-weight: 600;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.status-tag {
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 20px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
}

.status-tag.locked {
  background: rgba(239, 68, 68, 0.15);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.status-tag.off {
  background: var(--warning-bg);
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.status-tag.active {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.toggle-switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--card-border);
  transition: .3s;
  border-radius: 24px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .3s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--accent);
}

input:checked + .slider:before {
  transform: translateX(20px);
}

.marks-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.input-group label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.input-group input {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 0.6rem 0.8rem;
  color: var(--text-main);
  font-size: 0.9rem;
  font-weight: 600;
  outline: none;
}

.input-group input:focus {
  border-color: var(--accent);
}

/* Task List & Rows */
.task-section-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.task-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.task-row {
  background: var(--row-bg);
  border: 1px solid var(--row-border);
  border-radius: 16px;
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  animation: fadeIn 0.3s ease forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.file-info {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex: 1;
  min-width: 0;
}

.file-icon {
  width: 42px;
  height: 42px;
  background: rgba(99, 102, 241, 0.15);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.file-details {
  min-width: 0;
}

.file-name {
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 0.25rem;
}

.file-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.status-badge {
  padding: 0.4rem 0.85rem;
  border-radius: 30px;
  font-size: 0.8rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
}

.status-uploaded { background: var(--warning-bg); color: var(--warning); }
.status-queued { background: var(--warning-bg); color: var(--warning); }
.status-processing { background: rgba(99, 102, 241, 0.15); color: var(--accent); }
.status-completed { background: var(--success-bg); color: var(--success); }
.status-error { background: var(--danger-bg); color: var(--danger); }

.spinner {
  width: 14px;
  height: 14px;
  border: 2px solid currentColor;
  border-bottom-color: transparent;
  border-radius: 50%;
  display: inline-block;
  animation: rotation 1s linear infinite;
}

@keyframes rotation {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.row-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}

.btn-action {
  padding: 0.55rem 1rem;
  border-radius: 10px;
  font-size: 0.825rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
}

.btn-download-docx {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.btn-download-docx:hover {
  background: var(--success);
  color: white;
}

.btn-download-json {
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent);
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.btn-download-json:hover {
  background: var(--accent);
  color: white;
}

.btn-delete {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-delete:hover {
  background: var(--danger);
  color: white;
}

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}