/*
Theme Name: Multilingual AI Summarizer
Theme URI: https://example.com/summarizer-theme
Author: Your Name
Author URI: https://example.com
Description: A premium one-page WordPress theme for an AI-powered multilingual text summarizer tool. Clean, modern SaaS-style design with dark mode support.
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: ai-summarizer
Tags: one-column, custom-colors, custom-logo, featured-images, translation-ready
*/

/* ========================================
   CSS Variables / Design Tokens
   ======================================== */
:root {
  --color-primary: #0d9488;
  --color-primary-light: #14b8a6;
  --color-primary-dark: #0f766e;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafb;
  --color-bg-card: #ffffff;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --color-success: #22c55e;
  --color-error: #ef4444;
  --color-warning: #f59e0b;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
  --radius: 12px;
  --radius-sm: 8px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --max-width: 1200px;
}

/* Dark mode */
body.dark-mode {
  --color-bg: #0f172a;
  --color-bg-alt: #1e293b;
  --color-bg-card: #1e293b;
  --color-text: #f1f5f9;
  --color-text-muted: #94a3b8;
  --color-border: #334155;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4);
  --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.5);
}

/* ========================================
   Reset & Base
   ======================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--color-primary-dark);
}

img {
  max-width: 100%;
  height: auto;
}

/* ========================================
   Layout
   ======================================== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ========================================
   Header / Navigation
   ======================================== */
.site-header {
  background: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(255,255,255,0.85);
}

body.dark-mode .site-header {
  background: rgba(15,23,42,0.85);
}

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

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
}

.site-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
}

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

.theme-toggle {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem;
  cursor: pointer;
  color: var(--color-text);
  font-size: 1.1rem;
  transition: all 0.2s;
}

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

/* ========================================
   Hero Section
   ======================================== */
.hero {
  text-align: center;
  padding: 4rem 0 3rem;
  background: var(--color-bg-alt);
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto 2rem;
}

.hero .badges {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.badge {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* ========================================
   Main App Section
   ======================================== */
.app-section {
  padding: 3rem 0;
}

.app-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

/* ========================================
   Card Component
   ======================================== */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.card-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-header h2 {
  font-size: 1rem;
  font-weight: 600;
}

.card-body {
  padding: 1.5rem;
}

/* ========================================
   Text Input
   ======================================== */
.text-input-area {
  width: 100%;
  min-height: 250px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-bg);
  resize: vertical;
  transition: border-color 0.2s;
  line-height: 1.7;
}

.text-input-area:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(13,148,136,0.1);
}

.text-input-area::placeholder {
  color: var(--color-text-muted);
}

.input-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.75rem;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.input-meta .counters {
  display: flex;
  gap: 1rem;
}

/* ========================================
   File Upload
   ======================================== */
.file-upload-area {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1.5rem;
  text-align: center;
  margin-top: 1rem;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.file-upload-area:hover {
  border-color: var(--color-primary);
  background: rgba(13,148,136,0.03);
}

.file-upload-area input[type="file"] {
  display: none;
}

.file-upload-area .upload-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

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

/* ========================================
   Options Panel
   ======================================== */
.options-panel {
  margin-top: 1.5rem;
}

.option-group {
  margin-bottom: 1.25rem;
}

.option-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.option-buttons {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.option-btn {
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-sans);
}

.option-btn:hover {
  border-color: var(--color-primary);
}

.option-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* Select dropdown */
.select-input {
  width: 100%;
  padding: 0.6rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 0.9rem;
  font-family: var(--font-sans);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
}

.select-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* Slider */
.range-slider {
  width: 100%;
  -webkit-appearance: none;
  height: 6px;
  border-radius: 3px;
  background: var(--color-border);
  outline: none;
  margin-top: 0.5rem;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  box-shadow: 0 2px 4px rgba(0,0,0,0.15);
}

/* Toggle switch */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0;
}

.toggle-label {
  font-size: 0.85rem;
  color: var(--color-text);
}

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

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

.toggle-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: var(--color-border);
  border-radius: 24px;
  transition: 0.3s;
}

.toggle-slider::before {
  content: '';
  position: absolute;
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background: #fff;
  border-radius: 50%;
  transition: 0.3s;
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--color-primary);
}

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

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.5rem;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all 0.2s;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  box-shadow: 0 4px 12px rgba(13,148,136,0.25);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(13,148,136,0.35);
}

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

.btn-secondary {
  background: var(--color-bg-alt);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

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

.btn-danger {
  background: var(--color-error);
  color: #fff;
}

.btn-block {
  width: 100%;
}

.btn-group {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

/* ========================================
   Summary Output
   ======================================== */
.summary-output {
  min-height: 200px;
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  line-height: 1.8;
  font-size: 0.95rem;
  white-space: pre-wrap;
}

.summary-output.empty {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-style: italic;
}

.summary-output ul {
  padding-left: 1.25rem;
}

.summary-output li {
  margin-bottom: 0.5rem;
}

.summary-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.75rem;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ========================================
   Loading Spinner
   ======================================== */
.loading-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.3);
  z-index: 200;
  align-items: center;
  justify-content: center;
}

.loading-overlay.active {
  display: flex;
}

.spinner-container {
  background: var(--color-bg-card);
  padding: 2.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 1rem;
}

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

.spinner-container p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

/* ========================================
   Toast / Notifications
   ======================================== */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 300;
  transform: translateY(120%);
  opacity: 0;
  transition: all 0.3s ease;
}

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

.toast.success {
  background: var(--color-success);
  color: #fff;
}

.toast.error {
  background: var(--color-error);
  color: #fff;
}

/* ========================================
   Sample Texts Section
   ======================================== */
.samples-section {
  padding: 3rem 0;
  background: var(--color-bg-alt);
}

.samples-section h2 {
  text-align: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 2rem;
}

.samples-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.sample-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  cursor: pointer;
  transition: all 0.2s;
}

.sample-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.sample-card h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.sample-card p {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ========================================
   Footer
   ======================================== */
.site-footer {
  text-align: center;
  padding: 2rem 0;
  border-top: 1px solid var(--color-border);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 1.75rem;
  }

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

  .card-body {
    padding: 1rem;
  }

  .btn-group {
    flex-direction: column;
  }

  .option-buttons {
    flex-direction: column;
  }

  .option-btn {
    width: 100%;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 2.5rem 0 2rem;
  }

  .hero h1 {
    font-size: 1.5rem;
  }

  .site-logo span {
    display: none;
  }
}