/* Modern design CSS for Threads Media Downloader */
:root {
  --primary-color: #f43f5e;  /* Rose-500 from Tailwind */
  --primary-hover: #e11d48;  /* Rose-600 from Tailwind */
  --secondary-color: #f8f9fa;
  --background-color: #ffffff;
  --background-gradient-start: #ffffff;
  --background-gradient-end: #f9fafb;
  --text-color: #333333;
  --heading-color: #111827;  /* Gray-900 from Tailwind */
  --text-light: #6b7280;     /* Gray-500 from Tailwind */
  --border-color: #e5e7eb;   /* Gray-200 from Tailwind */
  --card-bg: #ffffff;
  --info-bg: #f1f5f9;        /* Slate-100 from Tailwind */
  --error-color: #ef4444;    /* Red-500 from Tailwind */
  --success-color: #10b981;  /* Emerald-500 from Tailwind */
  --border-radius: 0.5rem;
  --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --transition: all 0.2s ease;
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  color: var(--text-color);
  line-height: 1.6;
  background-color: var(--background-color);
  margin: 0;
  padding: 0;
}

/* Layout */
.page-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

main {
  flex: 1;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--heading-color);
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.025em;
}

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

h3 {
  font-size: 1.25rem;
  font-weight: 600;
}

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

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

p {
  margin-bottom: 1rem;
}

.highlight {
  color: var(--primary-color);
}

/* Header */
.site-header {
  background-color: rgba(255, 255, 255, 0.8);
  padding: 0;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(8px);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
  display: flex;
  align-items: center;
}

.logo i {
  margin-right: 0.5rem;
}

.main-navigation ul {
  list-style: none;
  display: flex;
  margin: 0;
  padding: 0;
  gap: 1.5rem;
}

.main-navigation a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
  font-size: 0.875rem;
  transition: var(--transition);
}

.main-navigation a:hover {
  color: var(--primary-color);
}

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

.login-button {
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--text-color);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  color: var(--text-color);
}

/* Hero section */
.hero-section {
  text-align: center;
  padding: 4rem 1rem 6rem;
  background: linear-gradient(to bottom, var(--background-gradient-start), var(--background-gradient-end));
  border-bottom: 1px solid var(--border-color);
}

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

.hero-section h1 {
  margin-bottom: 1.5rem;
}

.hero-section p {
  font-size: 1.125rem;
  color: var(--text-light);
  max-width: 36rem;
  margin: 0 auto 3rem;
}

/* Downloader form */
.downloader-container {
  max-width: 36rem;
  margin: 0 auto;
  padding: 1.5rem;
  background-color: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  border: 1px solid var(--border-color);
}

.download-form {
  position: relative;
}

.input-group {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

#threads-url {
  flex: 1;
  height: 3rem;
  padding: 0 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 1rem;
  transition: var(--transition);
}

#threads-url:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(244, 63, 94, 0.2);
}

.download-button {
  background-color: var(--primary-color);
  color: white;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-width: 140px;
}

.download-button:hover {
  background-color: var(--primary-hover);
}

.download-button i {
  margin-right: 0.5rem;
}

.info-box {
  padding: 1rem;
  background-color: var(--info-bg);
  border-radius: var(--border-radius);
  margin-bottom: 1rem;
  text-align: left;
}

.info-content {
  display: flex;
  gap: 0.75rem;
}

.info-content i {
  color: var(--primary-color);
  margin-top: 0.25rem;
}

.info-content p {
  margin-bottom: 0.25rem;
  font-size: 0.875rem;
  color: var(--text-color);
}

.info-content .example {
  font-size: 0.75rem;
  color: var(--text-light);
}

/* Loader and Progress */
.loader {
  display: none;
  margin: 2rem auto;
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top: 3px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.progress-container {
  display: none;
  margin: 1.5rem 0;
}

.progress-step {
  display: flex;
  align-items: center;
  margin-bottom: 0.75rem;
}

.step-indicator {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: #f1f5f9;
  border: 2px solid #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-light);
  margin-right: 12px;
  transition: var(--transition);
}

.step-indicator.active {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-hover);
}

.step-text {
  font-size: 0.875rem;
  color: var(--text-color);
}

/* Media container */
.media-container {
  margin-top: 1.5rem;
}

.media-wrapper {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.25rem;
}

.media-card {
  background: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 0.75rem;
}

.media-type-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-light);
}

.media-item {
  width: 100%;
  border-radius: var(--border-radius);
  background: #f8fafc;
}

.media-item img,
.media-item video {
  width: 100%;
  height: auto;
  display: block;
}

.media-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 0.85rem;
  border-radius: 0.5rem;
  background: var(--primary-color);
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: var(--transition);
}

.media-download-btn:hover {
  background: var(--primary-hover);
}

.download-all-container {
  margin-top: 1.5rem;
  text-align: center;
}

#download-all-button {
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--border-radius);
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 1.5rem auto 0;
}

#download-all-button:hover {
  background-color: var(--primary-hover);
}

#download-all-button i {
  margin-right: 0.5rem;
}

#error-container {
  display: none;
  padding: 1rem;
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--error-color);
  border-radius: var(--border-radius);
  margin-top: 1rem;
}

/* How it works section */
.how-it-works {
  background-color: white;
  padding: 4rem 0;
  border-bottom: 1px solid var(--border-color);
}

.steps-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.step-card {
  padding: 1.5rem;
  background-color: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  text-align: center;
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.step-card:hover {
  transform: translateY(-5px);
}

.step-icon {
  margin-bottom: 1rem;
  display: flex;
  justify-content: center;
}

.step-number {
  width: 48px;
  height: 48px;
  background-color: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
}

.step-card h3 {
  margin-bottom: 0.75rem;
}

.step-card p {
  color: var(--text-light);
  font-size: 0.9375rem;
}

/* Features section */
.features {
  background-color: var(--secondary-color);
  padding: 4rem 0;
  border-bottom: 1px solid var(--border-color);
}

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

.feature-card {
  padding: 1.5rem;
  background-color: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.feature-card:hover {
  transform: translateY(-5px);
}

.feature-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: rgba(244, 63, 94, 0.1); /* Rose-500 with opacity */
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  color: var(--primary-color);
  font-size: 1.5rem;
}

.feature-card h3 {
  margin-bottom: 0.75rem;
}

.feature-card p {
  color: var(--text-light);
  font-size: 0.9375rem;
}

/* FAQ section */
.faq {
  background-color: white;
  padding: 4rem 0;
  border-bottom: 1px solid var(--border-color);
}

.faq-container {
  max-width: 800px;
  margin: 2rem auto 0;
}

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

.faq-question {
  padding: 1.25rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: white;
}

.faq-question h3 {
  margin: 0;
  font-size: 1.125rem;
}

.faq-icon {
  transition: var(--transition);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 1.25rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
  padding: 0 1.25rem 1.25rem;
  max-height: 500px;
}

/* CTA section */
.cta {
  background-color: var(--info-bg);
  padding: 4rem 0;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
}

.cta p {
  font-size: 1.125rem;
  color: var(--text-light);
  max-width: 36rem;
  margin: 0 auto 2rem;
}

.cta-button {
  background-color: var(--primary-color);
  color: white;
  padding: 0.75rem 2rem;
  border: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.cta-button:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
}

/* Footer */
.site-footer {
  background-color: white;
  padding: 3rem 0 1.5rem;
  border-top: 1px solid var(--border-color);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-column h3 {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

.footer-column p {
  font-size: 0.875rem;
  color: var(--text-light);
}

.footer-column ul {
  list-style: none;
  padding: 0;
}

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

.footer-column ul li a {
  font-size: 0.875rem;
  color: var(--text-light);
  transition: var(--transition);
}

.footer-column ul li a:hover {
  color: var(--primary-color);
}

.footer-bottom {
  text-align: center;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.footer-bottom p {
  font-size: 0.875rem;
  color: var(--text-light);
  margin: 0;
}

/* Mobile responsive */
@media (max-width: 768px) {
  .site-header .container {
    height: 3.5rem;
  }

  .nav-buttons .login-button {
    display: none;
  }

  .mobile-menu-toggle {
    display: block;
    padding: 0.75rem;
    min-width: 48px;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .main-navigation {
    display: none;
  }

  .main-navigation.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 3.5rem;
    left: 0;
    right: 0;
    background: white;
    padding: 1rem;
    box-shadow: var(--box-shadow);
    z-index: 1000;
    border-top: 1px solid var(--border-color);
  }

  .main-navigation.active ul {
    flex-direction: column;
  }

  .main-navigation.active li {
    margin: 0.5rem 0;
  }

  .main-navigation.active a {
    display: block;
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
  }

  .hero-section {
    padding: 3rem 1rem;
  }

  .hero-section h1 {
    font-size: 1.875rem;
    line-height: 1.2;
  }

  .hero-section p {
    font-size: 1rem;
  }

  .input-group {
    flex-direction: column;
    gap: 0.75rem;
  }

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

  .footer-content {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  /* Touch Target Compliance */
  .download-button {
    width: 100%;
    min-height: 48px;
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
  }

  .media-download-btn {
    min-height: 48px;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    width: 100%;
    justify-content: center;
  }

  #threads-url {
    min-height: 48px;
    font-size: 16px;
    padding: 0 1rem;
  }

  .cta-button {
    min-height: 48px;
    padding: 0.875rem 2rem;
    font-size: 1.0625rem;
  }

  .faq-question {
    padding: 1rem;
    min-height: 48px;
  }

  #download-all-button {
    width: 100%;
    max-width: 400px;
    min-height: 48px;
    padding: 0.875rem 1.5rem;
  }

  /* Typography Scaling */
  h2 {
    font-size: 1.75rem;
  }

  h3 {
    font-size: 1.125rem;
  }

  /* Form & Input Optimization */
  input, textarea, select {
    font-size: 16px;
  }

  .modal .input-group {
    flex-direction: column;
  }

  .modal .input-group input[type="text"] {
    border-radius: var(--border-radius);
    min-height: 48px;
    font-size: 16px;
  }

  .modal .input-group button {
    border-radius: var(--border-radius);
    min-height: 48px;
    width: 100%;
  }

  /* Notification & Modal Positioning */
  .notification {
    top: auto;
    bottom: 20px;
    right: 20px;
    left: 20px;
    max-width: none;
    font-size: 0.9375rem;
  }

  .modal-content {
    margin: 10% auto;
    padding: 1.5rem;
    width: 95%;
    max-height: 90vh;
    overflow-y: auto;
  }

  .modal-content .close {
    top: 10px;
    right: 10px;
    font-size: 32px;
    padding: 0.5rem;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .modal-content h2 {
    padding-right: 2.5rem;
    font-size: 1.5rem;
  }

  /* Touch Feedback States */
  .download-button:active,
  .media-download-btn:active,
  .cta-button:active,
  #download-all-button:active {
    transform: scale(0.98);
    opacity: 0.9;
  }

  .mobile-menu-toggle:active {
    background-color: var(--border-color);
    border-radius: var(--border-radius);
  }

  .main-navigation.active a:active {
    background-color: var(--info-bg);
  }

  .faq-question:active {
    background-color: var(--info-bg);
  }

  /* Focus states for keyboard navigation */
  .download-button:focus,
  .media-download-btn:focus,
  .cta-button:focus,
  #threads-url:focus,
  .mobile-menu-toggle:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
  }

  /* Remove default tap highlight */
  * {
    -webkit-tap-highlight-color: transparent;
  }

  /* Additional Mobile Polish */
  section {
    padding: 3rem 0;
  }

  .step-card,
  .feature-card {
    padding: 1.25rem;
  }

  .step-card:hover,
  .feature-card:hover {
    transform: none;
  }

  .media-wrapper {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
  }

  .info-content {
    flex-direction: column;
    gap: 0.5rem;
  }

  .info-content i {
    margin-top: 0;
  }

  .progress-step {
    margin-bottom: 0.5rem;
  }

  .step-indicator {
    width: 28px;
    height: 28px;
    font-size: 0.75rem;
    margin-right: 10px;
  }

  .step-text {
    font-size: 0.8125rem;
  }

  .login-method {
    padding: 1.25rem;
    margin-bottom: 1.5rem;
  }

  .instructions {
    padding-left: 1.25rem;
    font-size: 0.9375rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

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

  .media-wrapper {
    grid-template-columns: 1fr;
  }

  /* Typography adjustments for very small screens */
  .hero-section h1 {
    font-size: 1.625rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .logo {
    font-size: 1.125rem;
  }

  /* Spacing optimizations */
  .hero-section {
    padding: 2rem 1rem;
  }

  .downloader-container {
    padding: 1rem;
  }

  .step-card,
  .feature-card {
    padding: 1.25rem;
  }

  .site-header .container {
    height: 3rem;
    padding: 0 0.75rem;
  }

  .media-card {
    padding: 0.5rem;
  }

  .site-footer {
    padding: 2rem 0 1rem;
  }

  .footer-content {
    gap: 1.25rem;
  }

  /* Further notification adjustment */
  .notification {
    left: 10px;
    right: 10px;
    bottom: 10px;
    font-size: 0.875rem;
  }

  /* Further modal optimization */
  .modal-content {
    margin: 5% auto;
    padding: 1rem;
    width: 98%;
  }
}

/* Additional styles for modal and authentication */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(2px);
}

.modal-content {
  background-color: white;
  margin: 5% auto;
  padding: 2rem;
  border-radius: var(--border-radius);
  width: 90%;
  max-width: 600px;
  position: relative;
  animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-content .close {
  color: #aaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
  position: absolute;
  top: 15px;
  right: 20px;
  cursor: pointer;
}

.modal-content .close:hover,
.modal-content .close:focus {
  color: var(--primary-color);
  text-decoration: none;
}

.login-methods {
  margin-top: 1rem;
}

.login-method {
  margin-bottom: 2rem;
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: #f9fafb;
}

.login-method h3 {
  margin-bottom: 1rem;
  color: var(--heading-color);
}

.instructions {
  margin: 1rem 0;
  padding-left: 1.5rem;
}

.instructions li {
  margin-bottom: 0.5rem;
  line-height: 1.5;
}

.note {
  font-size: 0.875rem;
  color: var(--text-light);
  font-style: italic;
  margin-top: 1rem;
}

.auth-message {
  padding: 0.75rem 1rem;
  border-radius: var(--border-radius);
  margin-top: 1rem;
  font-size: 0.875rem;
}

.auth-message.error {
  background-color: #fef2f2;
  color: #dc2626;
  border: 1px solid #fecaca;
}

.auth-message.success {
  background-color: #f0fdf4;
  color: #16a34a;
  border: 1px solid #bbf7d0;
}

.auth-message.info {
  background-color: #eff6ff;
  color: #2563eb;
  border: 1px solid #bfdbfe;
}

.modal .input-group {
  display: flex;
  margin-bottom: 1rem;
}

.modal .input-group input[type="text"] {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius) 0 0 var(--border-radius);
  font-size: 0.875rem;
}

.modal .input-group button {
  padding: 0.75rem 1.5rem;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.875rem;
}

.modal .input-group button:hover {
  background-color: var(--primary-hover);
}

/* Fix for FAQ interaction */
.faq-item .faq-question:hover {
  background-color: #f1f5f9;
}

/* Script to toggle FAQs */
.faq-item .faq-answer {
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
}

/* Notification styles */
.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 1rem 1.5rem;
  border-radius: var(--border-radius);
  color: white;
  font-weight: 500;
  box-shadow: var(--box-shadow);
  z-index: 1001;
  max-width: 350px;
  transition: all 0.3s ease;
}

.notification.info {
  background-color: #3b82f6;
}

.notification.success {
  background-color: #10b981;
}

.notification.error {
  background-color: #ef4444;
}

.notification.warning {
  background-color: #f59e0b;
}

.notification.fade-out {
  opacity: 0;
  transform: translateX(100%);
}

/* Error message styles */
.error-message {
  background-color: #fef2f2;
  color: #dc2626;
  padding: 1rem;
  border-radius: var(--border-radius);
  border: 1px solid #fecaca;
  margin: 1rem 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}