:root {
  /* Color Palette */
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --secondary: #10b981;
  --background: #f8fafc;
  --surface: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --border: #e2e8f0;
  --danger: #ef4444;

  /* Effects */
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.3s ease-in-out;

  /* Typography */
  --font-main: 'Tajawal', sans-serif;
}

[data-theme="dark"] {
  --background: #0f172a;
  --surface: #1e293b;
  --text: #f1f5f9;
  --text-light: #94a3b8;
  --border: #334155;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.3);
}

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

body {
  font-family: var(--font-main);
  background-color: var(--background);
  color: var(--text);
  line-height: 1.6;
  transition: background-color var(--transition), color var(--transition);
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-main);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  text-decoration: none;
  gap: 0.5rem;
}

.btn-primary {
  background-color: var(--primary);
  color: white;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

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

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

.btn-danger-outline {
  background-color: transparent;
  border: 1px solid var(--danger);
  color: var(--danger);
}

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

.btn-sm {
  padding: 0.4rem 0.8rem;
  font-size: 0.875rem;
}

.btn-text {
  background: none;
  color: var(--text-light);
  padding: 0.5rem;
}

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

/* Header */
.main-header {
  background-color: var(--surface);
  box-shadow: var(--shadow);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--primary);
}

.theme-toggle {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  transition: background-color 0.2s;
}

.theme-toggle:hover {
  background-color: var(--border);
}

/* Hero */
.hero {
  padding: 4rem 0;
  text-align: center;
}

.hero-title {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--text);
}

.hero-desc {
  font-size: 1.125rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto 2rem;
}

/* Tools Grid */
.tools-section {
  padding: 2rem 0 4rem;
}

.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.tool-card {
  background-color: var(--surface);
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid var(--border);
  text-align: center;
}

.tool-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

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

.tool-card h3 {
  margin-bottom: 0.5rem;
  color: var(--text);
}

.tool-card p {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* Workspace (Tool Active) */
.workspace-section {
  padding: 2rem 0;
  min-height: 60vh;
}

.workspace-section.hidden {
  display: none;
}

.workspace-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.workspace-content {
  background-color: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 2rem;
}

.label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

label {
  font-weight: 700;
  color: var(--text);
}

textarea {
  width: 100%;
  padding: 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background-color: var(--background);
  color: var(--text);
  font-family: var(--font-main);
  font-size: 1rem;
  resize: vertical;
  min-height: 200px;
  transition: border-color 0.2s;
}

textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.input-stats {
  text-align: left;
  font-size: 0.85rem;
  color: var(--text-light);
  margin-top: 0.5rem;
}

.tool-controls {
  padding: 1.5rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin: 1.5rem 0;
}

.result-group textarea {
  background-color: rgba(37, 99, 235, 0.05);
  /* Light primary tint */
}

[data-theme="dark"] .result-group textarea {
  background-color: rgba(37, 99, 235, 0.1);
}

/* Footer */
.main-footer {
  background-color: var(--surface);
  padding: 2rem 0;
  text-align: center;
  color: var(--text-light);
  margin-top: auto;
  border-top: 1px solid var(--border);
}

/* Toast */
#toast-container {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  background-color: var(--text);
  color: var(--background);
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.3s ease-out;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.toast.success {
  background-color: var(--secondary);
  color: white;
}

.toast.error {
  background-color: var(--danger);
  color: white;
}

@keyframes slideUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }

  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* Responsive */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }

  .grid-container {
    grid-template-columns: 1fr;
  }

  .tool-controls {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  opacity: 1;
  transition: opacity 0.3s;
}

.modal.hidden {
  display: none;
  opacity: 0;
  pointer-events: none;
}

.modal-content {
  background-color: var(--surface);
  padding: 1.5rem;
  border-radius: var(--radius);
  width: 90%;
  max-width: 500px;
  box-shadow: var(--shadow-lg);
  max-height: 80vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
}

.history-item {
  padding: 0.75rem;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background-color 0.2s;
  font-size: 0.9rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.history-item:hover {
  background-color: var(--background);
  color: var(--primary);
}

.history-item:last-child {
  border-bottom: none;
}

.text-center {
  text-align: center;
}