/* ========================================
   BestDownloader — Design System
   ======================================== */

/* --- CSS Custom Properties --- */
:root {
  /* Colors — Professional Slate/Teal */
  --bg-primary: #0c0f14;
  --bg-secondary: #141820;
  --bg-card: rgba(20, 26, 36, 0.75);
  --bg-card-hover: rgba(30, 38, 52, 0.8);
  --bg-input: rgba(18, 24, 34, 0.9);
  --bg-glass: rgba(255, 255, 255, 0.025);

  --text-primary: #e8eaf0;
  --text-secondary: #8a92a4;
  --text-muted: #515a6e;

  --accent-1: #2d8cf0; /* Professional Blue */
  --accent-2: #1abc9c; /* Teal */
  --accent-3: #3b7dd8; /* Mid Blue */
  --accent-gradient: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  --accent-gradient-hover: linear-gradient(135deg, #4da3f7, #26d4ab);

  --border-color: rgba(255, 255, 255, 0.06);
  --border-color-hover: rgba(255, 255, 255, 0.12);
  --border-accent: rgba(45, 140, 240, 0.25);

  --success: #1abc9c;
  --error: #e74c3c;
  --warning: #e67e22;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 40px rgba(45, 140, 240, 0.08);
  --shadow-glow-hover: 0 0 60px rgba(45, 140, 240, 0.14);

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.75rem;
  --font-size-5xl: 3.5rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

/* --- Layout --- */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* --- Background Effects --- */
.bg-effects {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.4;
  animation: float 20s ease-in-out infinite;
}

.bg-orb-1 {
  width: 500px;
  height: 500px;
  background: var(--accent-1);
  top: -200px;
  right: -150px;
  opacity: 0.08;
  animation-delay: 0s;
}

.bg-orb-2 {
  width: 400px;
  height: 400px;
  background: var(--accent-2);
  bottom: -100px;
  left: -100px;
  opacity: 0.06;
  animation-delay: -7s;
}

.bg-orb-3 {
  width: 300px;
  height: 300px;
  background: var(--accent-3);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0.04;
  animation-delay: -14s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(30px, -40px) scale(1.05); }
  50% { transform: translate(-20px, 30px) scale(0.95); }
  75% { transform: translate(40px, 20px) scale(1.02); }
}

/* --- Header --- */
.header {
  position: relative;
  z-index: 10;
  padding: var(--space-6) 0;
}

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

/* Language Switcher */
.lang-switcher {
  display: flex;
  gap: var(--space-1);
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 2px;
}

.lang-btn {
  padding: var(--space-1) var(--space-3);
  background: transparent;
  color: var(--text-muted);
  border: none;
  border-radius: 6px;
  font-family: var(--font-family);
  font-size: var(--font-size-xs);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  letter-spacing: 0.03em;
}

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

.lang-btn-active {
  background: var(--accent-1);
  color: white;
}

/* Header Nav */
.header-nav {
  display: flex;
  gap: var(--space-2);
}

.nav-link {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-glass);
}

.nav-link-active {
  color: var(--accent-1);
  background: rgba(45, 140, 240, 0.08);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--accent-gradient);
  font-size: var(--font-size-lg);
}

.logo-highlight {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Platform Hero Badge (subpages) */
.platform-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: white;
  margin-bottom: var(--space-6);
}

.platform-hero-ig {
  background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
}

.platform-hero-tt {
  background: #010101;
  border: 1px solid rgba(255,255,255,0.15);
}

/* --- Hero --- */
.hero {
  position: relative;
  z-index: 10;
  padding: var(--space-10) 0 var(--space-20);
  text-align: center;
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-6);
}

.hero-title-line {
  display: block;
}

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

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto var(--space-12);
  line-height: 1.7;
}

/* --- Download Card --- */
.download-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
  animation: fadeInUp 0.8s ease-out;
}

.download-card:hover,
.download-card:focus-within {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-lg), var(--shadow-glow-hover);
}

.download-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.input-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-2) var(--space-2) var(--space-2) var(--space-5);
  transition: border-color var(--transition-base);
}

.input-wrapper:focus-within {
  border-color: var(--accent-1);
}

.input-icon {
  color: var(--text-muted);
  flex-shrink: 0;
  display: flex;
}

.url-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  padding: var(--space-3) 0;
  min-width: 0;
}

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

.submit-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--accent-gradient);
  color: white;
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
}

.submit-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

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

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

/* Platform Badge */
.platform-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  align-self: flex-start;
  padding: var(--space-1) var(--space-3);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  transition: all var(--transition-base);
}

.platform-badge[hidden] {
  display: none;
}

.platform-badge[data-platform="instagram"] {
  border-color: rgba(225, 48, 108, 0.3);
  color: #e1306c;
}

.platform-badge[data-platform="tiktok"] {
  border-color: rgba(0, 242, 234, 0.3);
  color: #00f2ea;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* --- Error Message --- */
.error-message {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: rgba(231, 76, 60, 0.1);
  border: 1px solid rgba(231, 76, 60, 0.2);
  border-radius: var(--radius-md);
  color: var(--error);
  font-size: var(--font-size-sm);
  margin-top: var(--space-4);
  animation: fadeIn 0.3s ease-out;
}

.error-message[hidden] {
  display: none;
}

/* --- Results --- */
.results {
  margin-top: var(--space-8);
  animation: fadeInUp 0.5s ease-out;
}

.result-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  backdrop-filter: blur(20px);
}

.result-header {
  display: flex;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.result-thumb-wrapper {
  position: relative;
  flex-shrink: 0;
}

.result-thumbnail {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.result-platform-icon {
  position: absolute;
  bottom: -6px;
  right: -6px;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: white;
  border: 2px solid var(--bg-card);
}

.result-platform-icon[data-platform="instagram"] {
  background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
}

.result-platform-icon[data-platform="tiktok"] {
  background: #010101;
}

.result-info {
  flex: 1;
  min-width: 0;
}

.result-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: var(--space-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.result-meta {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

/* --- Download Buttons --- */
.result-actions {
  margin-bottom: var(--space-6);
}

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-8);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  width: 100%;
}

.download-btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: var(--shadow-sm);
}

.download-btn-primary:hover {
  background: var(--accent-gradient-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md), 0 0 30px rgba(45, 140, 240, 0.15);
}

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

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

.download-btn-small {
  padding: var(--space-3) var(--space-5);
  font-size: var(--font-size-sm);
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  width: auto;
}

.download-btn-small:hover {
  border-color: var(--border-color-hover);
  background: var(--bg-card-hover);
}

/* --- Formats --- */
.formats-details {
  border-top: 1px solid var(--border-color);
  padding-top: var(--space-4);
}

.formats-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  padding: var(--space-2) 0;
  list-style: none;
  transition: color var(--transition-fast);
}

.formats-summary::-webkit-details-marker {
  display: none;
}

.formats-summary:hover {
  color: var(--text-primary);
}

.formats-summary svg {
  transition: transform var(--transition-base);
}

.formats-details[open] .formats-summary svg {
  transform: rotate(180deg);
}

.formats-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-top: var(--space-4);
}

.format-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
}

.format-item:hover {
  border-color: var(--border-color-hover);
  background: var(--bg-card-hover);
}

.format-info {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  color: var(--text-secondary);
}

.format-ext {
  display: inline-block;
  padding: var(--space-1) var(--space-2);
  background: rgba(45, 140, 240, 0.12);
  border-radius: 4px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--accent-1);
  text-transform: uppercase;
  min-width: 40px;
  text-align: center;
}

/* --- Features --- */
.features {
  position: relative;
  z-index: 10;
  padding: var(--space-16) 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

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

.feature-icon {
  font-size: 2rem;
  margin-bottom: var(--space-4);
}

.feature-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.feature-card p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- How It Works --- */
.how-it-works {
  position: relative;
  z-index: 10;
  padding: var(--space-12) 0 var(--space-20);
}

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-12);
  letter-spacing: -0.02em;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.step {
  text-align: center;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent-gradient);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: white;
  margin-bottom: var(--space-5);
}

.step h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.step p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- Feature Images (replacing emoji) --- */
.feature-img {
  width: 64px;
  height: 64px;
  object-fit: contain;
  margin-bottom: var(--space-4);
  border-radius: var(--radius-sm);
}

/* --- Platforms Section --- */
.platforms {
  position: relative;
  z-index: 10;
  padding: var(--space-16) 0;
}

.platforms-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.platform-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

.platform-card:hover {
  border-color: var(--border-color-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.platform-card-link {
  text-decoration: none;
  color: inherit;
  display: block;
}

.platform-card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  color: white;
}

.platform-card-ig {
  background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
}

.platform-card-tt {
  background: #010101;
  border: 1px solid rgba(255,255,255,0.1);
}

.platform-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.platform-card p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

.platform-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
}

.platform-tags li {
  padding: var(--space-1) var(--space-3);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
}

/* --- Formats Section --- */
.formats-section {
  position: relative;
  z-index: 10;
  padding: var(--space-12) 0;
  text-align: center;
}

.section-desc {
  max-width: 600px;
  margin: 0 auto var(--space-8);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.7;
}

.format-badges {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.format-badge {
  padding: var(--space-3) var(--space-6);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.format-badge:hover {
  border-color: var(--accent-1);
  color: var(--accent-1);
}

/* --- FAQ Section --- */
.faq {
  position: relative;
  z-index: 10;
  padding: var(--space-16) 0 var(--space-20);
}

.faq-list {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

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

.faq-item[open] {
  border-color: var(--border-accent);
}

.faq-question {
  padding: var(--space-5) var(--space-6);
  cursor: pointer;
  font-weight: 600;
  font-size: var(--font-size-base);
  color: var(--text-primary);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: color var(--transition-fast);
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: '+';
  font-size: var(--font-size-xl);
  color: var(--text-muted);
  transition: transform var(--transition-base);
  flex-shrink: 0;
  margin-left: var(--space-4);
}

.faq-item[open] .faq-question::after {
  content: '−';
  color: var(--accent-1);
}

.faq-question:hover {
  color: var(--accent-1);
}

.faq-answer {
  padding: 0 var(--space-6) var(--space-5);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --- Utility: Screen Reader Only --- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- Content Types Grid (subpages) --- */
.content-types {
  position: relative;
  z-index: 10;
  padding: var(--space-16) 0;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.content-type-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
  text-align: center;
}

.content-type-card:hover {
  border-color: var(--border-color-hover);
  transform: translateY(-2px);
}

.content-type-icon {
  font-size: 2rem;
  margin-bottom: var(--space-3);
}

.content-type-card h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.content-type-card p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.5;
}

/* --- Footer --- */
.footer {
  position: relative;
  z-index: 10;
  padding: var(--space-8) 0;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.footer-nav {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
  margin-bottom: var(--space-4);
}

.footer-link {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--text-primary);
}

.footer p {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

/* --- Spinner --- */
.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.spinner-sm {
  width: 14px;
  height: 14px;
}

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

/* --- Animations --- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .hero-title {
    font-size: var(--font-size-3xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-base);
  }

  .input-wrapper {
    flex-direction: column;
    padding: var(--space-3);
  }

  .input-icon {
    display: none;
  }

  .url-input {
    padding: var(--space-3);
    width: 100%;
    text-align: center;
  }

  .submit-btn {
    width: 100%;
    padding: var(--space-4);
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }

  .steps-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .result-header {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .download-card {
    padding: var(--space-5);
  }

  .result-card {
    padding: var(--space-5);
  }

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

  .content-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }

  .header-nav {
    display: none;
  }

  .footer-nav {
    flex-direction: column;
    gap: var(--space-2);
  }

  .faq-question {
    font-size: var(--font-size-sm);
    padding: var(--space-4) var(--space-5);
  }

  .faq-answer {
    padding: 0 var(--space-5) var(--space-4);
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: var(--font-size-2xl);
  }

  .container {
    padding: 0 var(--space-4);
  }

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

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

  .format-badges {
    flex-direction: column;
    align-items: center;
  }

  .platform-hero-badge {
    font-size: var(--font-size-xs);
  }

  .lang-switcher {
    gap: 0;
  }

  .lang-btn {
    padding: var(--space-1) var(--space-2);
    font-size: 0.65rem;
  }
}