/* ========== DESIGN TOKENS ========== */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: rgba(255,255,255,0.04);
  --bg-card-hover: rgba(255,255,255,0.07);
  --bg-glass: rgba(255,255,255,0.06);
  --border-glass: rgba(255,255,255,0.08);
  --text-primary: #f0f0f5;
  --text-secondary: #9a9ab0;
  --text-muted: #6b6b80;
  --accent-pink: #E040FB;
  --accent-red: #FF5252;
  --accent-orange: #FF6E40;
  --accent-yellow: #FFD740;
  --accent-green: #69F0AE;
  --accent-blue: #448AFF;
  --accent-purple: #B388FF;
  --gradient-main: linear-gradient(135deg, #E040FB 0%, #FF5252 50%, #FFD740 100%);
  --gradient-hero: radial-gradient(ellipse at 50% 0%, rgba(224,64,251,0.15) 0%, transparent 60%);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-lg: 0 16px 64px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 40px rgba(224,64,251,0.15);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Outfit', 'Inter', sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== RESET ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}
a { text-decoration: none; color: inherit; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
input { font-family: inherit; }

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

/* ========== BG PARTICLES ========== */
.bg-particles {
  position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden;
}
.bg-particles .particle {
  position: absolute; border-radius: 50%; opacity: 0.15;
  animation: floatParticle 20s ease-in-out infinite;
}
@keyframes floatParticle {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-80px) scale(1.1); }
}

/* ========== HEADER ========== */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 16px 0;
  background: rgba(10,10,15,0.7);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
  transition: var(--transition);
}
.header.scrolled { padding: 10px 0; background: rgba(10,10,15,0.92); }
.header-inner { display: flex; align-items: center; justify-content: space-between; }

.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { display: flex; }
.logo-text { font-family: var(--font-display); font-size: 1.5rem; font-weight: 800; letter-spacing: -0.5px; }
.logo-highlight { background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

.nav { display: flex; gap: 8px; }
.nav-link {
  padding: 8px 18px; border-radius: var(--radius-sm); font-size: 0.9rem; font-weight: 500;
  color: var(--text-secondary); transition: var(--transition);
}
.nav-link:hover, .nav-link.active { color: var(--text-primary); background: var(--bg-glass); }

.mobile-menu-btn { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.mobile-menu-btn span { width: 22px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: var(--transition); }

/* ========== HERO ========== */
.hero {
  position: relative; padding: 160px 0 80px; text-align: center; overflow: hidden;
  background: var(--gradient-hero);
}
.hero-glow {
  position: absolute; border-radius: 50%; filter: blur(120px); pointer-events: none; opacity: 0.4;
}
.hero-glow-1 { width: 500px; height: 500px; background: rgba(224,64,251,0.2); top: -200px; left: -100px; animation: pulseGlow 8s ease-in-out infinite; }
.hero-glow-2 { width: 400px; height: 400px; background: rgba(255,82,82,0.15); top: -100px; right: -50px; animation: pulseGlow 10s ease-in-out infinite 2s; }
.hero-glow-3 { width: 350px; height: 350px; background: rgba(255,215,64,0.1); bottom: -150px; left: 50%; animation: pulseGlow 12s ease-in-out infinite 4s; }
@keyframes pulseGlow { 0%, 100% { transform: scale(1); opacity: 0.4; } 50% { transform: scale(1.2); opacity: 0.6; } }

.hero-content { position: relative; z-index: 2; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 20px; border-radius: 50px;
  background: var(--bg-glass); border: 1px solid var(--border-glass);
  font-size: 0.85rem; font-weight: 500; color: var(--accent-green);
  margin-bottom: 28px; animation: fadeInDown 0.8s ease;
}
.badge-dot { width: 8px; height: 8px; background: var(--accent-green); border-radius: 50%; animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }
@keyframes fadeInDown { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

.hero-title {
  font-family: var(--font-display); font-size: clamp(2.2rem, 5vw, 3.8rem); font-weight: 800;
  line-height: 1.15; letter-spacing: -1px; margin-bottom: 20px;
  animation: fadeInUp 0.8s ease 0.1s both;
}
.gradient-text { background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

.hero-subtitle {
  font-size: 1.1rem; color: var(--text-secondary); max-width: 560px; margin: 0 auto 36px;
  line-height: 1.7; animation: fadeInUp 0.8s ease 0.2s both;
}

/* ========== TYPE TABS ========== */
.type-tabs {
  display: flex; justify-content: center; gap: 6px; flex-wrap: wrap;
  margin-bottom: 32px; animation: fadeInUp 0.8s ease 0.3s both;
}
.type-tab {
  display: flex; align-items: center; gap: 6px;
  padding: 10px 20px; border-radius: var(--radius-sm);
  font-size: 0.88rem; font-weight: 500; color: var(--text-secondary);
  background: var(--bg-glass); border: 1px solid transparent;
  transition: var(--transition);
}
.type-tab:hover { color: var(--text-primary); border-color: var(--border-glass); background: var(--bg-card-hover); }
.type-tab.active {
  color: #fff; background: rgba(224,64,251,0.15); border-color: rgba(224,64,251,0.3);
}

/* ========== DOWNLOAD BOX ========== */
.download-box {
  max-width: 720px; margin: 0 auto 24px;
  background: var(--bg-glass); border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg); padding: 8px;
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-glow); transition: var(--transition);
  animation: fadeInUp 0.8s ease 0.4s both;
}
.download-box:focus-within { border-color: rgba(224,64,251,0.3); box-shadow: 0 0 60px rgba(224,64,251,0.2); }

.input-wrapper {
  display: flex; align-items: center; gap: 8px;
  background: rgba(0,0,0,0.3); border-radius: var(--radius-md); padding: 6px 8px 6px 16px;
  margin-bottom: 8px;
}
.input-icon { color: var(--text-muted); display: flex; flex-shrink: 0; }
.url-input {
  flex: 1; background: none; border: none; outline: none;
  font-size: 1rem; color: var(--text-primary); padding: 12px 8px;
}
.url-input::placeholder { color: var(--text-muted); }

.paste-btn {
  display: flex; align-items: center; gap: 6px;
  padding: 10px 18px; border-radius: var(--radius-sm);
  font-size: 0.85rem; font-weight: 600; color: var(--text-primary);
  background: var(--bg-card-hover); border: 1px solid var(--border-glass);
  transition: var(--transition); white-space: nowrap;
}
.paste-btn:hover { background: rgba(255,255,255,0.12); }

.download-btn {
  width: 100%; padding: 16px 32px; border-radius: var(--radius-md);
  font-size: 1.05rem; font-weight: 700; color: #fff;
  background: var(--gradient-main); background-size: 200% 200%;
  transition: var(--transition); position: relative; overflow: hidden;
}
.download-btn::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
  opacity: 0; transition: var(--transition);
}
.download-btn:hover::before { opacity: 1; }
.download-btn:hover { transform: translateY(-1px); box-shadow: 0 8px 32px rgba(224,64,251,0.3); }
.download-btn:active { transform: translateY(0); }
.download-btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.btn-content, .btn-loading { display: flex; align-items: center; justify-content: center; gap: 10px; }

.spinner {
  width: 20px; height: 20px; border: 2.5px solid rgba(255,255,255,0.3);
  border-top-color: #fff; border-radius: 50%; animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ========== STATUS & SUPPORTED ========== */
.status-msg {
  max-width: 720px; margin: 0 auto 16px; padding: 0; font-size: 0.9rem;
  border-radius: var(--radius-sm); text-align: center; transition: var(--transition);
}
.status-msg.error { padding: 12px 20px; background: rgba(255,82,82,0.12); color: #FF8A80; border: 1px solid rgba(255,82,82,0.2); }
.status-msg.success { padding: 12px 20px; background: rgba(105,240,174,0.12); color: #69F0AE; border: 1px solid rgba(105,240,174,0.2); }

.supported-info {
  display: flex; align-items: center; justify-content: center; gap: 12px; flex-wrap: wrap;
  font-size: 0.82rem; color: var(--text-muted); animation: fadeInUp 0.8s ease 0.5s both;
}
.format-tags { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; }
.format-tag {
  padding: 4px 12px; border-radius: 50px; font-size: 0.78rem; font-weight: 500;
  background: var(--bg-glass); border: 1px solid var(--border-glass); color: var(--text-secondary);
}

/* ========== RESULTS ========== */
.results-section { padding: 60px 0; }
.results-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 32px; }
.results-header .section-title { display: flex; align-items: center; gap: 10px; font-size: 1.4rem; color: var(--accent-green); }
.clear-btn {
  display: flex; align-items: center; gap: 6px; padding: 8px 16px;
  border-radius: var(--radius-sm); font-size: 0.85rem; font-weight: 500;
  color: var(--text-secondary); background: var(--bg-glass); border: 1px solid var(--border-glass);
  transition: var(--transition);
}
.clear-btn:hover { color: var(--accent-red); border-color: rgba(255,82,82,0.3); }

.results-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 24px; }

.result-card {
  background: var(--bg-card); border: 1px solid var(--border-glass); border-radius: var(--radius-lg);
  overflow: hidden; transition: var(--transition); animation: fadeInUp 0.5s ease both;
}
.result-card:hover { border-color: rgba(224,64,251,0.2); transform: translateY(-4px); box-shadow: var(--shadow-md); }

.result-thumb {
  position: relative; aspect-ratio: 1; overflow: hidden; background: var(--bg-secondary);
}
.result-thumb img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.result-card:hover .result-thumb img { transform: scale(1.05); }
.result-type-badge {
  position: absolute; top: 12px; left: 12px; padding: 4px 12px;
  border-radius: 50px; font-size: 0.75rem; font-weight: 600; text-transform: uppercase;
  background: rgba(0,0,0,0.6); backdrop-filter: blur(10px); color: #fff;
}
.result-duration {
  position: absolute; bottom: 12px; right: 12px; padding: 4px 10px;
  border-radius: 6px; font-size: 0.78rem; font-weight: 600;
  background: rgba(0,0,0,0.7); color: #fff;
}
.result-info { padding: 20px; }
.result-title {
  font-size: 0.92rem; font-weight: 500; color: var(--text-primary);
  margin-bottom: 8px; line-height: 1.5;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.result-meta { display: flex; gap: 16px; margin-bottom: 16px; font-size: 0.82rem; color: var(--text-muted); }
.result-meta span { display: flex; align-items: center; gap: 4px; }

.result-actions { display: flex; gap: 8px; }
.result-dl-btn {
  flex: 1; display: flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 16px; border-radius: var(--radius-sm);
  font-size: 0.88rem; font-weight: 600; color: #fff;
  background: var(--gradient-main); transition: var(--transition);
}
.result-dl-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 20px rgba(224,64,251,0.3); }
.result-dl-btn.secondary {
  background: var(--bg-glass); border: 1px solid var(--border-glass); color: var(--text-primary);
}
.result-dl-btn.secondary:hover { background: var(--bg-card-hover); box-shadow: none; }

/* ========== HOW IT WORKS ========== */
.how-section { padding: 100px 0; }

.section-header { text-align: center; margin-bottom: 60px; }
.section-badge {
  display: inline-block; padding: 6px 18px; border-radius: 50px;
  font-size: 0.82rem; font-weight: 600; text-transform: uppercase; letter-spacing: 1px;
  background: rgba(224,64,251,0.1); color: var(--accent-pink); border: 1px solid rgba(224,64,251,0.2);
  margin-bottom: 16px;
}
.section-title-lg {
  font-family: var(--font-display); font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800;
  letter-spacing: -0.5px; margin-bottom: 12px;
}
.section-desc { font-size: 1.05rem; color: var(--text-secondary); max-width: 500px; margin: 0 auto; }

.steps-grid { display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap; }

.step-card {
  flex: 1; min-width: 240px; max-width: 320px; padding: 40px 28px; text-align: center;
  background: var(--bg-card); border: 1px solid var(--border-glass); border-radius: var(--radius-lg);
  transition: var(--transition); position: relative;
}
.step-card:hover { border-color: rgba(224,64,251,0.2); transform: translateY(-6px); box-shadow: var(--shadow-glow); }

.step-number {
  font-family: var(--font-display); font-size: 3rem; font-weight: 900;
  background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  opacity: 0.2; position: absolute; top: 16px; right: 24px;
}
.step-icon { color: var(--accent-pink); margin-bottom: 20px; }
.step-title { font-family: var(--font-display); font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; }
.step-desc { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.6; }

.step-connector { color: var(--text-muted); flex-shrink: 0; }

/* ========== FEATURES ========== */
.features-section { padding: 100px 0; background: var(--bg-secondary); }

.features-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 20px; }

.feature-card {
  padding: 32px 24px; border-radius: var(--radius-lg);
  background: var(--bg-card); border: 1px solid var(--border-glass);
  transition: var(--transition);
}
.feature-card:hover { border-color: rgba(224,64,251,0.15); transform: translateY(-4px); box-shadow: var(--shadow-md); }

.feature-icon {
  width: 56px; height: 56px; border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  background: rgba(224,64,251,0.08); color: var(--accent, var(--accent-pink));
  margin-bottom: 20px; transition: var(--transition);
}
.feature-card:hover .feature-icon { transform: scale(1.1); }
.feature-card h3 { font-family: var(--font-display); font-size: 1.08rem; font-weight: 700; margin-bottom: 10px; }
.feature-card p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.6; }

/* ========== FAQ ========== */
.faq-section { padding: 100px 0; }

.faq-list { max-width: 720px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border-glass); border-radius: var(--radius-md);
  margin-bottom: 10px; overflow: hidden; transition: var(--transition);
}
.faq-item.open { border-color: rgba(224,64,251,0.2); }
.faq-question {
  width: 100%; display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px; font-size: 1rem; font-weight: 600; color: var(--text-primary);
  text-align: left; transition: var(--transition); background: var(--bg-card);
}
.faq-question:hover { background: var(--bg-card-hover); }
.faq-chevron { transition: var(--transition); color: var(--text-muted); flex-shrink: 0; }
.faq-item.open .faq-chevron { transform: rotate(180deg); color: var(--accent-pink); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.4s ease;
}
.faq-item.open .faq-answer { max-height: 300px; }
.faq-answer p { padding: 0 24px 20px; font-size: 0.92rem; color: var(--text-secondary); line-height: 1.7; }

/* ========== FOOTER ========== */
.footer { padding: 80px 0 40px; background: var(--bg-secondary); border-top: 1px solid var(--border-glass); }

.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 48px; }
.footer-brand .logo { margin-bottom: 16px; }
.footer-desc { font-size: 0.88rem; color: var(--text-muted); line-height: 1.7; max-width: 320px; }

.footer-links h4 { font-family: var(--font-display); font-size: 0.95rem; font-weight: 700; margin-bottom: 16px; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 0.88rem; color: var(--text-muted); transition: var(--transition); }
.footer-links a:hover { color: var(--text-primary); }

.footer-bottom {
  padding-top: 32px; border-top: 1px solid var(--border-glass); text-align: center;
}
.disclaimer { font-size: 0.82rem; color: var(--text-muted); max-width: 700px; margin: 0 auto 16px; line-height: 1.7; }
.copyright { font-size: 0.82rem; color: var(--text-muted); }

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
  .nav { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; padding: 16px; background: rgba(10,10,15,0.95); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border-glass); }
  .nav.open { display: flex; }
  .mobile-menu-btn { display: flex; }
  .mobile-menu-btn.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .mobile-menu-btn.open span:nth-child(2) { opacity: 0; }
  .mobile-menu-btn.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
  
  .hero { padding: 130px 0 60px; }
  .type-tabs { gap: 4px; }
  .type-tab { padding: 8px 14px; font-size: 0.8rem; }
  .input-wrapper { flex-wrap: wrap; }
  .paste-btn { flex-shrink: 0; }
  .steps-grid { flex-direction: column; }
  .step-connector { transform: rotate(90deg); }
  .features-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .results-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .download-btn { padding: 14px 24px; font-size: 0.95rem; }
}