/* ============================================
   Instagram Anonimo - Main Stylesheet
   Modern, Responsive, Accessible Design
   ============================================ */

/* CSS Variables for Theming */
:root {
  /* Light Theme */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #e9ecef;
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-muted: #adb5bd;
  --accent-primary: #405de6;
  --accent-secondary: #5851db;
  --accent-hover: #5b51e8;
  --border-color: #dee2e6;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
  --transition: all 0.3s ease;
}

[data-theme="dark"] {
  /* Dark Theme */
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --bg-tertiary: #3a3a3a;
  --text-primary: #f8f9fa;
  --text-secondary: #ced4da;
  --text-muted: #868e96;
  --accent-primary: #5b8def;
  --accent-secondary: #6c7ae8;
  --accent-hover: #7a8ff0;
  --border-color: #404040;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--transition), color var(--transition);
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

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

a:hover {
  color: var(--accent-hover);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header & Navigation */
header {
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--transition);
}

.nav-links a:hover {
  color: var(--accent-primary);
}

.theme-toggle {
  background: none;
  border: 2px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.theme-toggle:hover {
  background-color: var(--bg-secondary);
  border-color: var(--accent-primary);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 4rem 1.5rem;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.hero h1 {
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.125rem;
  max-width: 700px;
  margin: 0 auto 2rem;
  color: var(--text-secondary);
}

.cta-button {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  padding: 1rem 2rem;
  border-radius: 8px;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: var(--shadow-md);
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

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

/* Tool Section */
.tool-section {
  padding: 4rem 1.5rem;
  background-color: var(--bg-secondary);
}

.tool-container {
  max-width: 600px;
  margin: 0 auto;
  background-color: var(--bg-primary);
  padding: 2.5rem;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
}

.tool-container h2 {
  text-align: center;
  margin-bottom: 2rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-primary);
}

.form-group input {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: var(--transition);
}

.form-group input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(64, 93, 230, 0.1);
}

.submit-button {
  width: 100%;
  padding: 1rem;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.submit-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.submit-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.loading {
  display: none;
  text-align: center;
  padding: 2rem;
  color: var(--text-secondary);
}

.loading.active {
  display: block;
}

.loading-spinner {
  border: 3px solid var(--border-color);
  border-top: 3px solid var(--accent-primary);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
  margin: 0 auto 1rem;
}

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

.results {
  display: none;
  margin-top: 2rem;
  padding: 0;
  background-color: var(--bg-secondary);
  border-radius: 12px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.results.active {
  display: block;
  animation: fadeIn 0.3s ease-in;
}

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

.results-placeholder {
  text-align: center;
  padding: 2rem;
  color: var(--text-secondary);
}

.results img {
  max-width: 100%;
  height: auto;
  border-radius: 50%;
  object-fit: cover;
}

.results a {
  transition: var(--transition);
}

.results a:hover {
  opacity: 0.8;
}

.disclaimer {
  margin-top: 1.5rem;
  padding: 1rem;
  background-color: var(--bg-tertiary);
  border-left: 4px solid var(--accent-primary);
  border-radius: 4px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Content Sections */
.content-section {
  padding: 4rem 1.5rem;
}

.content-section h2 {
  margin-bottom: 2rem;
  text-align: center;
}

.content-wrapper {
  max-width: 800px;
  margin: 0 auto;
}

.content-wrapper h3 {
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.content-wrapper ul, .content-wrapper ol {
  margin-left: 2rem;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.content-wrapper li {
  margin-bottom: 0.5rem;
}

/* FAQ Section */
.faq-section {
  padding: 4rem 1.5rem;
  background-color: var(--bg-secondary);
}

.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin-bottom: 1rem;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  box-shadow: var(--shadow-sm);
}

.faq-question {
  padding: 1.5rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--text-primary);
  transition: var(--transition);
}

.faq-question:hover {
  background-color: var(--bg-secondary);
}

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--accent-primary);
  transition: var(--transition);
}

.faq-item.active .faq-question::after {
  content: '−';
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  padding: 0 1.5rem;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 1.5rem 1.5rem;
}

.faq-answer p {
  color: var(--text-secondary);
  margin: 0;
}

/* Blog Section */
.blog-section {
  padding: 4rem 1.5rem;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.blog-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.blog-card-image {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 3rem;
}

.blog-card-content {
  padding: 1.5rem;
}

.blog-card h3 {
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
}

.blog-card p {
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.blog-card a {
  color: var(--accent-primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

/* Blog Post */
.blog-post {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.blog-post-header {
  text-align: center;
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
}

.blog-post-meta {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 1rem;
}

.blog-post-content {
  line-height: 1.8;
}

.blog-post-content h2 {
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

.blog-post-content h3 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.blog-post-content img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: 2rem 0;
}

/* Forms */
.contact-form, .removal-form {
  max-width: 600px;
  margin: 0 auto;
  background-color: var(--bg-primary);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow-md);
}

.form-group textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  resize: vertical;
  min-height: 120px;
  transition: var(--transition);
}

.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(64, 93, 230, 0.1);
}

.form-error {
  color: #dc3545;
  font-size: 0.875rem;
  margin-top: 0.5rem;
  display: none;
}

.form-error.active {
  display: block;
}

.form-success {
  background-color: #d4edda;
  color: #155724;
  padding: 1rem;
  border-radius: 8px;
  margin-top: 1rem;
  display: none;
}

.form-success.active {
  display: block;
}

[data-theme="dark"] .form-success {
  background-color: #1e4620;
  color: #90ee90;
}

/* Footer */
footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 3rem 1.5rem 1.5rem;
  margin-top: 4rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h4 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.footer-section p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--accent-primary);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

/* Responsive Design */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  .hero {
    padding: 3rem 1.5rem;
  }

  .tool-container,
  .contact-form,
  .removal-form {
    padding: 1.5rem;
  }

  .content-section,
  .faq-section,
  .blog-section {
    padding: 3rem 1.5rem;
  }

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

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  nav {
    padding: 1rem;
  }

  .logo {
    font-size: 1.25rem;
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus Styles */
a:focus,
button:focus,
input:focus,
textarea:focus {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}