/* =========================================================
   CleanDoc v2.0 · OFS Tlaxcala
   Diseño minimalista moderno
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --color-primary: #1e293b;
  --color-accent: #3b82f6;
  --color-success: #10b981;
  --color-error: #ef4444;
  --color-warning: #f59e0b;
  --color-bg: #fafafa;
  --color-surface: #ffffff;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --color-hover: #f8fafc;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
}

/* =========================================================
   RESET
   ========================================================= */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* =========================================================
   UTILITIES
   ========================================================= */
.hidden {
  display: none !important;
}

code {
  background: var(--color-hover);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
  color: var(--color-accent);
  font-family: 'Monaco', 'Courier New', monospace;
}

/* =========================================================
   HEADER
   ========================================================= */
.header-fixed {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.95);
}

.header-content {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  max-width: 1200px;
  width: 100%;
}

.ofs-logo {
  height: 60px;
  width: auto;
  object-fit: contain;
}

.header-text h1 {
  color: var(--color-primary);
  font-weight: 700;
  font-size: 1.75rem;
  letter-spacing: -0.5px;
}

.header-text h1 .version {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--color-accent);
  background: #eff6ff;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  margin-left: 0.5rem;
  vertical-align: middle;
}

.header-text p {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-weight: 400;
  margin-top: 0.25rem;
}

/* =========================================================
   MAIN
   ========================================================= */
.main-content {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem 1.5rem;
}

.tool-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
  padding: 3.5rem;
  max-width: 700px;
  width: 100%;
  transition: var(--transition);
}

.tool-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.tool-card h2 {
  color: var(--color-primary);
  font-weight: 700;
  font-size: 1.875rem;
  margin-bottom: 1rem;
  letter-spacing: -0.5px;
  text-align: center;
}

.tool-card h3 {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 1rem;
  margin: 1.5rem 0 1rem 0;
}

/* =========================================================
   UPLOAD AREA (DRAG & DROP)
   ========================================================= */
.upload-area {
  background: var(--color-hover);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  margin-top: 2rem;
}

.upload-area:hover {
  border-color: var(--color-accent);
  background: #f0f7ff;
}

.upload-area.drag-over {
  border-color: var(--color-accent);
  background: #dbeafe;
  transform: scale(1.02);
}

.upload-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

.upload-area h3 {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 1.25rem;
  margin: 0 0 0.5rem 0;
}

.upload-area p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.file-types {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  background: white;
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  border: 1px solid var(--color-border);
}

/* =========================================================
   FILE PREVIEW
   ========================================================= */
.file-preview {
  margin-top: 2rem;
  animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.file-list {
  background: var(--color-hover);
  border-radius: var(--radius);
  padding: 1rem;
  max-height: 300px;
  overflow-y: auto;
}

.file-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  margin-bottom: 0.75rem;
  transition: var(--transition-fast);
}

.file-item:last-child {
  margin-bottom: 0;
}

.file-item:hover {
  box-shadow: var(--shadow-sm);
  transform: translateX(4px);
}

.file-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1;
  min-width: 0;
}

.file-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.file-details {
  display: flex;
  flex-direction: column;
  min-width: 0;
  flex: 1;
}

.file-name {
  font-weight: 500;
  color: var(--color-text);
  font-size: 0.9rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-size {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.btn-remove {
  background: var(--color-error);
  color: white;
  border: none;
  border-radius: 50%;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  padding: 0;
  margin: 0;
  transition: var(--transition-fast);
  flex-shrink: 0;
}

.btn-remove:hover {
  background: #dc2626;
  transform: scale(1.1);
}

/* =========================================================
   BUTTONS
   ========================================================= */
.btn-primary {
  width: 100%;
  background: var(--color-accent);
  color: white;
  border: none;
  border-radius: var(--radius);
  padding: 1rem 2rem;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  margin-top: 1rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-primary:hover {
  background: #2563eb;
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-primary:disabled:hover {
  background: var(--color-accent);
  box-shadow: var(--shadow-sm);
}

.btn-icon {
  font-size: 1.2rem;
}

/* =========================================================
   PROGRESS BAR
   ========================================================= */
.progress-container {
  margin-top: 2rem;
  animation: fadeIn 0.3s ease-in-out;
}

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

#progressText {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
}

#progressPercent {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-accent);
}

.progress-bar {
  height: 8px;
  background: var(--color-hover);
  border-radius: 10px;
  overflow: hidden;
  position: relative;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent), #60a5fa);
  border-radius: 10px;
  transition: width 0.3s ease-out;
  position: relative;
  overflow: hidden;
}

.progress-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* =========================================================
   STATUS MESSAGES
   ========================================================= */
.status-message {
  margin-top: 1.5rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
  animation: fadeIn 0.3s ease-in-out;
}

.status-message.status-success {
  background: #d1fae5;
  color: #065f46;
  border: 1px solid #6ee7b7;
}

.status-message.status-error {
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #fca5a5;
}

.status-message.status-warning {
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #fcd34d;
}

.status-message.status-info {
  background: #dbeafe;
  color: #1e40af;
  border: 1px solid #93c5fd;
}

/* =========================================================
   STATISTICS
   ========================================================= */
.stats-container {
  margin-top: 2rem;
  padding: 1.5rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: var(--radius-lg);
  animation: fadeIn 0.5s ease-in-out;
}

.stats-container h3 {
  color: white;
  text-align: center;
  margin: 0 0 1.5rem 0;
  font-size: 1.1rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
}

.stat-item {
  background: rgba(255, 255, 255, 0.95);
  border-radius: var(--radius);
  padding: 1.25rem 1rem;
  text-align: center;
  transition: var(--transition-fast);
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-weight: 500;
  line-height: 1.3;
}

/* =========================================================
   FOOTER
   ========================================================= */
.dashboard-footer {
  text-align: center;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.8rem;
  padding: 1.5rem;
}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 768px) {
  .header-fixed {
    padding: 1.25rem 1.5rem;
  }

  .header-content {
    gap: 1rem;
  }

  .header-text h1 {
    font-size: 1.5rem;
  }

  .header-text h1 .version {
    font-size: 0.6rem;
    padding: 0.2rem 0.4rem;
  }

  .header-text p {
    font-size: 0.8rem;
  }

  .main-content {
    padding: 2.5rem 1rem;
  }

  .tool-card {
    padding: 2.5rem 2rem;
  }

  .tool-card h2 {
    font-size: 1.5rem;
  }

  .upload-area {
    padding: 2rem 1.5rem;
  }

  .upload-icon {
    font-size: 2.5rem;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .header-content {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }

  .ofs-logo {
    height: 50px;
  }

  .header-text h1 {
    font-size: 1.25rem;
  }

  .header-text h1 .version {
    display: block;
    margin: 0.5rem 0 0 0;
  }

  .main-content {
    padding: 2rem 1rem;
  }

  .tool-card {
    padding: 2rem 1.5rem;
  }

  .tool-card h2 {
    font-size: 1.25rem;
  }

  .upload-area {
    padding: 1.5rem 1rem;
  }

  .upload-area h3 {
    font-size: 1.1rem;
  }

  .file-list {
    padding: 0.75rem;
  }

  .file-item {
    padding: 0.6rem 0.75rem;
  }

  .file-name {
    font-size: 0.85rem;
  }

  .stats-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .stat-value {
    font-size: 1.75rem;
  }
}

/* =========================================================
   SCROLLBAR STYLING
   ========================================================= */
.file-list::-webkit-scrollbar {
  width: 8px;
}

.file-list::-webkit-scrollbar-track {
  background: var(--color-hover);
  border-radius: 4px;
}

.file-list::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}

.file-list::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}