/* ==========================================================================
   PinGrab - Modern Pinterest Video & Image Downloader CSS Design System
   ========================================================================== */

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

:root {
  /* Color Palette - Vibrant Dark Mode */
  --bg-primary: #0b0f19;
  --bg-secondary: #131b2e;
  --bg-tertiary: #1b2640;
  
  --accent-pinterest: #e60023;
  --accent-pinterest-hover: #ff1a3c;
  --accent-gradient: linear-gradient(135deg, #e60023 0%, #ff4b6e 50%, #902bf5 100%);
  --accent-glow: rgba(230, 0, 35, 0.4);

  --glass-bg: rgba(19, 27, 46, 0.7);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-hover: rgba(27, 38, 64, 0.85);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --success: #10b981;
  --success-glow: rgba(16, 185, 129, 0.3);
  --warning: #f59e0b;
  --error: #ef4444;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;

  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
  --shadow-glow: 0 12px 40px -10px rgba(230, 0, 35, 0.35);
  --shadow-glass: 0 20px 50px rgba(0, 0, 0, 0.5);

  --font-main: 'Plus Jakarta Sans', sans-serif;
  --font-heading: 'Outfit', sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-primary: #f1f5f9;
  --bg-secondary: #ffffff;
  --bg-tertiary: #e2e8f0;

  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(0, 0, 0, 0.08);
  --glass-hover: rgba(255, 255, 255, 0.95);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --shadow-glass: 0 20px 50px rgba(0, 0, 0, 0.08);
}

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

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
  position: relative;
}

/* Background Animated Gradient Blobs */
.bg-glow-1 {
  position: fixed;
  top: -10%;
  left: 20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(230, 0, 35, 0.18) 0%, rgba(0, 0, 0, 0) 70%);
  filter: blur(80px);
  z-index: 0;
  pointer-events: none;
  animation: pulseGlow 10s infinite alternate ease-in-out;
}

.bg-glow-2 {
  position: fixed;
  bottom: 10%;
  right: 15%;
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(144, 43, 245, 0.15) 0%, rgba(0, 0, 0, 0) 70%);
  filter: blur(80px);
  z-index: 0;
  pointer-events: none;
  animation: pulseGlow 12s infinite alternate ease-in-out 2s;
}

@keyframes pulseGlow {
  0% { transform: scale(1) translate(0, 0); opacity: 0.7; }
  100% { transform: scale(1.2) translate(30px, -20px); opacity: 1; }
}

/* Container Layout */
.app-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Navigation Header */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  border-bottom: 1px solid var(--glass-border);
  position: relative;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-icon {
  width: 44px;
  height: 44px;
  background: var(--accent-gradient);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 22px;
  color: #fff;
  box-shadow: var(--shadow-glow);
}

.logo-text {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 24px;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-badge {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  background: rgba(230, 0, 35, 0.15);
  color: var(--accent-pinterest);
  padding: 3px 8px;
  border-radius: 20px;
  border: 1px solid rgba(230, 0, 35, 0.3);
}

/* Nav links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-pinterest-hover);
}

.mobile-menu-btn {
  display: none;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  font-size: 22px;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.theme-toggle-btn {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  font-size: 18px;
}

.theme-toggle-btn:hover {
  background: var(--glass-hover);
  transform: rotate(15deg);
}

/* Page Hero Section (for Info pages) */
.page-hero {
  text-align: center;
  padding: 50px 0 30px 0;
  max-width: 800px;
  margin: 0 auto;
}

.page-title {
  font-family: var(--font-heading);
  font-size: 44px;
  font-weight: 800;
  margin-bottom: 14px;
}

.page-title span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-subtitle {
  font-size: 17px;
  color: var(--text-secondary);
}

/* Shared Content Card for Pages & Articles */
.content-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-glass);
  margin-bottom: 60px;
  line-height: 1.8;
}

.content-card h2 {
  font-family: var(--font-heading);
  font-size: 26px;
  font-weight: 700;
  margin: 30px 0 14px 0;
  color: var(--text-primary);
}

.content-card h2:first-child {
  margin-top: 0;
}

.content-card h3 {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 600;
  margin: 20px 0 10px 0;
}

.content-card p {
  color: var(--text-secondary);
  font-size: 16px;
  margin-bottom: 16px;
}

.content-card ul {
  margin: 16px 0 24px 24px;
  color: var(--text-secondary);
}

.content-card li {
  margin-bottom: 8px;
}

.content-card code {
  background: var(--bg-tertiary);
  color: var(--accent-pinterest-hover);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 14px;
}

/* Feature Bullets Grid inside About */
.feature-bullets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin: 28px 0;
}

.bullet-box {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  padding: 24px;
  border-radius: var(--radius-lg);
}

.bullet-box h3 {
  font-size: 18px;
  margin-top: 0;
  margin-bottom: 8px;
}

.bullet-box p {
  font-size: 14px;
  margin-bottom: 0;
}

/* Contact Form Styling */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.form-input, .form-textarea {
  width: 100%;
  padding: 14px 18px;
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 15px;
  outline: none;
  transition: var(--transition);
}

.form-textarea {
  height: 140px;
  resize: vertical;
}

.form-input:focus, .form-textarea:focus {
  border-color: var(--accent-pinterest);
  box-shadow: 0 0 0 4px rgba(230, 0, 35, 0.15);
}

/* 3-Step Guide Grid */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.step-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  position: relative;
  transition: var(--transition);
}

.step-card:hover {
  transform: translateY(-4px);
  border-color: rgba(230, 0, 35, 0.3);
}

.step-num {
  width: 48px;
  height: 48px;
  background: var(--accent-gradient);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 22px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-glow);
}

.step-card h3 {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}

.step-card p {
  font-size: 14px;
  color: var(--text-secondary);
}

/* Formats Grid */
.formats-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.format-pill {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  padding: 10px 18px;
  border-radius: 30px;
  font-size: 14px;
  color: var(--text-primary);
}

/* FAQ Accordion Styling */
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-icon {
  font-size: 22px;
  color: var(--accent-pinterest);
  transition: var(--transition);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
  padding: 0 24px;
}

.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 0 24px 20px 24px;
  transition: max-height 0.3s cubic-bezier(1, 0, 1, 0);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

/* Footer Layout */
.main-footer {
  padding: 60px 0 30px 0;
  border-top: 1px solid var(--glass-border);
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 380px;
}

.footer-heading {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  transition: var(--transition);
}

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

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--glass-border);
  color: var(--text-muted);
  font-size: 13px;
}

.disclaimer-text {
  font-size: 12px;
  max-width: 700px;
  margin: 10px auto 0 auto;
  line-height: 1.5;
}

/* Hero Section */
.hero-section {
  text-align: center;
  padding: 60px 0 35px 0;
  max-width: 800px;
  margin: 0 auto;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(230, 0, 35, 0.1);
  border: 1px solid rgba(230, 0, 35, 0.25);
  border-radius: 30px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-pinterest-hover);
  margin-bottom: 24px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 52px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 20px;
}

.hero-title span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 36px;
  font-weight: 400;
}

/* Mode Navigation Tabs */
.tabs-header {
  display: inline-flex;
  background: var(--glass-bg);
  padding: 6px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  gap: 6px;
  margin-bottom: 32px;
  box-shadow: var(--shadow-sm);
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 10px 22px;
  border-radius: var(--radius-md);
  font-family: var(--font-main);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}

.tab-btn.active {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(230, 0, 35, 0.4);
}

/* Main Interactive Downloader Card */
.downloader-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 36px;
  box-shadow: var(--shadow-glass);
  margin-bottom: 60px;
}

/* Input Group */
.input-form-group {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
}

.input-wrapper {
  position: relative;
  flex: 1;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: 20px;
  color: var(--text-muted);
  font-size: 20px;
}

.main-input {
  width: 100%;
  padding: 18px 120px 18px 54px;
  background: var(--bg-secondary);
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 16px;
  transition: var(--transition);
  outline: none;
}

.main-input:focus {
  border-color: var(--accent-pinterest);
  box-shadow: 0 0 0 4px rgba(230, 0, 35, 0.15);
}

.input-actions {
  position: absolute;
  right: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.paste-btn, .clear-btn {
  background: var(--bg-tertiary);
  border: none;
  color: var(--text-secondary);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.paste-btn:hover, .clear-btn:hover {
  background: var(--accent-pinterest);
  color: #ffffff;
}

.download-submit-btn {
  background: var(--accent-gradient);
  color: #ffffff;
  border: none;
  padding: 18px 36px;
  border-radius: var(--radius-lg);
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-glow);
  white-space: nowrap;
}

.download-submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 30px rgba(230, 0, 35, 0.5);
}

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

/* Batch Textarea Form */
.batch-input-area {
  width: 100%;
  height: 140px;
  padding: 18px;
  background: var(--bg-secondary);
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 15px;
  resize: vertical;
  outline: none;
  transition: var(--transition);
  margin-bottom: 20px;
}

.batch-input-area:focus {
  border-color: var(--accent-pinterest);
  box-shadow: 0 0 0 4px rgba(230, 0, 35, 0.15);
}

/* Loading State */
.loading-box {
  display: none;
  text-align: center;
  padding: 40px 0;
}

.spinner {
  width: 56px;
  height: 56px;
  border: 4px solid rgba(230, 0, 35, 0.15);
  border-top-color: var(--accent-pinterest);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 20px auto;
}

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

.loading-text {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

.loading-subtext {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* Results Display Box */
.result-box {
  display: none;
  margin-top: 36px;
  padding-top: 36px;
  border-top: 1px solid var(--glass-border);
  animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-grid {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 32px;
  align-items: start;
}

/* Media Preview Container */
.media-preview-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  position: relative;
  box-shadow: var(--shadow-sm);
}

.media-preview-img, .media-preview-video {
  width: 100%;
  height: auto;
  max-height: 480px;
  object-fit: cover;
  display: block;
}

.media-type-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  color: #ffffff;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
  text-transform: uppercase;
}

/* Details & Download Action List */
.result-info {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.result-title {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.3;
}

.result-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  max-height: 80px;
  overflow-y: auto;
}

.download-options-title {
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.8px;
  margin-bottom: 16px;
}

.download-buttons-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.download-option-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  padding: 16px 20px;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
}

.download-option-btn:hover {
  background: var(--bg-tertiary);
  border-color: var(--accent-pinterest);
  transform: translateX(4px);
}

.btn-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.badge-quality {
  background: var(--accent-gradient);
  color: #fff;
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 6px;
  font-weight: 700;
}

.btn-icon-action {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--accent-pinterest-hover);
}

.action-bar-extra {
  display: flex;
  gap: 12px;
  margin-top: auto;
}

.secondary-action-btn {
  flex: 1;
  background: var(--bg-tertiary);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  padding: 12px;
  border-radius: var(--radius-md);
  font-family: var(--font-main);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.secondary-action-btn:hover {
  background: var(--glass-hover);
  border-color: var(--text-muted);
}

/* Feature Showcase Cards */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-bottom: 80px;
}

.feature-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(230, 0, 35, 0.3);
}

.feature-icon {
  width: 50px;
  height: 50px;
  background: rgba(230, 0, 35, 0.1);
  color: var(--accent-pinterest);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
}

.feature-title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-text {
  font-size: 14px;
  color: var(--text-secondary);
}

/* History Grid Tab */
.history-section {
  display: none;
}

.history-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.history-card {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.history-thumb {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.history-content {
  padding: 16px;
}

.history-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 30px;
  right: 30px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 9999;
}

.toast {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-left: 4px solid var(--accent-pinterest);
  padding: 14px 20px;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  font-weight: 600;
  animation: slideInRight 0.3s ease-out;
}

@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Responsive Media Queries */
@media (max-width: 900px) {
  .mobile-menu-btn {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    flex-direction: column;
    padding: 20px;
    gap: 16px;
    box-shadow: var(--shadow-glass);
    z-index: 100;
  }

  .nav-links.open {
    display: flex;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .result-grid {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 38px;
  }
  .input-form-group {
    flex-direction: column;
  }
  .download-submit-btn {
    width: 100%;
    justify-content: center;
  }
  .main-input {
    padding-right: 14px;
  }
  .input-actions {
    position: static;
    margin-top: 10px;
    justify-content: flex-end;
    width: 100%;
  }
}