@font-face { font-family: 'Paperlogy'; src: url('https://cdn.jsdelivr.net/gh/projectnoonnu/2408-3@1.0/Paperlogy-4Regular.woff2') format('woff2'); font-weight: 400; font-display: swap; }
    @font-face { font-family: 'Paperlogy'; src: url('https://cdn.jsdelivr.net/gh/projectnoonnu/2408-3@1.0/Paperlogy-5Medium.woff2') format('woff2'); font-weight: 500; font-display: swap; }
    @font-face { font-family: 'Paperlogy'; src: url('https://cdn.jsdelivr.net/gh/projectnoonnu/2408-3@1.0/Paperlogy-6SemiBold.woff2') format('woff2'); font-weight: 600; font-display: swap; }
    @font-face { font-family: 'Paperlogy'; src: url('https://cdn.jsdelivr.net/gh/projectnoonnu/2408-3@1.0/Paperlogy-7Bold.woff2') format('woff2'); font-weight: 700; font-display: swap; }
    @font-face { font-family: 'Paperlogy'; src: url('https://cdn.jsdelivr.net/gh/projectnoonnu/2408-3@1.0/Paperlogy-8ExtraBold.woff2') format('woff2'); font-weight: 800; font-display: swap; }

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

    body {
      font-family: 'Paperlogy', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
      background: #0a0a0f;
      color: #fff;
      line-height: 1.6;
      overflow-x: hidden;
    }

    /* 헤더 */
    header {
      background: rgba(10, 10, 15, 0.8);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(255,255,255,0.06);
      padding: 16px 0;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
    }

    nav {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
      transition: opacity 0.2s;
    }
    .logo:hover { opacity: 0.8; }

    .logo-icon {
      width: 40px;
      height: 40px;
      background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
    }
    .logo-icon svg { width: 22px; height: 22px; color: #fff; }

    .logo-text { display: flex; flex-direction: column; line-height: 1.2; }
    .logo-title { font-size: 20px; font-weight: 800; color: #fff; letter-spacing: -0.5px; }
    .logo-tagline { font-size: 11px; color: rgba(255,255,255,0.5); font-weight: 500; }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 32px;
    }

    .nav-menu > a,
    .nav-menu .dropdown-trigger {
      color: rgba(255,255,255,0.7);
      text-decoration: none;
      font-size: 14px;
      font-weight: 500;
      transition: color 0.2s;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .nav-menu > a:hover,
    .nav-menu .dropdown-trigger:hover {
      color: #fff;
    }

    .dropdown { position: relative; }
    .dropdown-trigger svg {
      width: 16px;
      height: 16px;
      transition: transform 0.2s;
    }
    .dropdown:hover .dropdown-trigger svg {
      transform: rotate(180deg);
    }

    .dropdown-menu {
      position: absolute;
      top: 100%;
      left: 50%;
      transform: translateX(-50%);
      background: rgba(20, 20, 30, 0.95);
      backdrop-filter: blur(20px);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: 16px;
      padding: 12px;
      min-width: 320px;
      box-shadow: 0 20px 60px rgba(0,0,0,0.5);
      opacity: 0;
      visibility: hidden;
      transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
      margin-top: 20px;
    }

    .dropdown:hover .dropdown-menu {
      opacity: 1;
      visibility: visible;
      margin-top: 12px;
    }

    .dropdown-menu a {
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 14px 16px;
      color: rgba(255,255,255,0.8);
      text-decoration: none;
      border-radius: 12px;
      transition: all 0.2s;
    }

    .dropdown-menu a:hover {
      background: linear-gradient(135deg, rgba(99, 102, 241, 0.2) 0%, rgba(139, 92, 246, 0.2) 100%);
      color: #fff;
    }

    .dropdown-menu a:hover .menu-icon {
      background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
      color: #fff;
      box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
    }

    .dropdown-menu .menu-icon {
      width: 42px;
      height: 42px;
      background: rgba(255,255,255,0.05);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #a78bfa;
      flex-shrink: 0;
      transition: all 0.3s;
    }
    .dropdown-menu .menu-icon svg { width: 20px; height: 20px; }

    .dropdown-menu .menu-text { display: flex; flex-direction: column; }
    .dropdown-menu .menu-title { font-weight: 600; font-size: 15px; color: #fff; }
    .dropdown-menu .menu-desc { font-size: 13px; color: rgba(255,255,255,0.5); margin-top: 2px; }

    .nav-right {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .start-btn {
      padding: 10px 24px;
      background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
      color: #fff;
      border: none;
      border-radius: 10px;
      font-weight: 600;
      font-size: 14px;
      cursor: pointer;
      text-decoration: none;
      transition: all 0.3s;
      box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
    }
    .start-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 25px rgba(99, 102, 241, 0.4);
    }

    /* 유저 메뉴 */
    .user-menu {
      display: none;
      align-items: center;
      gap: 12px;
    }
    .user-menu.active {
      display: flex;
    }
    .user-avatar {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 700;
      font-size: 14px;
      overflow: hidden;
    }
    .user-avatar img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .user-name {
      color: #fff;
      font-weight: 600;
      font-size: 14px;
      max-width: 100px;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    .dashboard-btn {
      padding: 8px 16px;
      background: rgba(255,255,255,0.1);
      border: 1px solid rgba(255,255,255,0.2);
      color: #fff;
      border-radius: 8px;
      font-weight: 500;
      font-size: 13px;
      text-decoration: none;
      transition: all 0.2s;
    }
    .dashboard-btn:hover {
      background: rgba(255,255,255,0.15);
    }
    .logout-btn {
      padding: 8px 16px;
      background: transparent;
      border: 1px solid rgba(255,255,255,0.2);
      color: rgba(255,255,255,0.7);
      border-radius: 8px;
      font-weight: 500;
      font-size: 13px;
      cursor: pointer;
      transition: all 0.2s;
    }
    .logout-btn:hover {
      border-color: rgba(255,255,255,0.4);
      color: #fff;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .mobile-menu-btn svg {
      width: 24px;
      height: 24px;
      color: #fff;
    }

    /* 히어로 섹션 */
    .hero {
      padding: 180px 24px 80px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    /* 파티클 캔버스 */
    #particles {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
      z-index: 0;
    }

    /* 떠다니는 오브 */
    .floating-orbs {
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      pointer-events: none;
      overflow: hidden;
      z-index: 0;
    }

    .orb {
      position: absolute;
      border-radius: 50%;
      filter: blur(80px);
      opacity: 0.5;
      animation: floatOrb 20s ease-in-out infinite;
    }

    .orb-1 {
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(99, 102, 241, 0.4) 0%, transparent 70%);
      top: -100px;
      left: 10%;
      animation-delay: 0s;
    }

    .orb-2 {
      width: 300px;
      height: 300px;
      background: radial-gradient(circle, rgba(168, 85, 247, 0.35) 0%, transparent 70%);
      top: 30%;
      right: 5%;
      animation-delay: -5s;
      animation-duration: 25s;
    }

    .orb-3 {
      width: 250px;
      height: 250px;
      background: radial-gradient(circle, rgba(236, 72, 153, 0.3) 0%, transparent 70%);
      bottom: 10%;
      left: 20%;
      animation-delay: -10s;
      animation-duration: 22s;
    }

    .orb-4 {
      width: 200px;
      height: 200px;
      background: radial-gradient(circle, rgba(59, 130, 246, 0.3) 0%, transparent 70%);
      top: 50%;
      left: 60%;
      animation-delay: -15s;
      animation-duration: 18s;
    }

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

    /* 마우스 따라다니는 글로우 */
    .mouse-glow {
      position: fixed;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, transparent 60%);
      border-radius: 50%;
      pointer-events: none;
      transform: translate(-50%, -50%);
      z-index: 0;
      opacity: 0;
      transition: opacity 0.3s;
    }

    .hero:hover .mouse-glow {
      opacity: 1;
    }

    .hero::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse 60% 40% at 80% 60%, rgba(139, 92, 246, 0.08) 0%, transparent 50%);
      pointer-events: none;
      z-index: 0;
    }

    .hero h1 {
      font-size: 56px;
      font-weight: 800;
      line-height: 1.15;
      margin-bottom: 24px;
      letter-spacing: -1px;
      position: relative;
      z-index: 1;
    }

    .hero h1 .gradient-text {
      background: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero .subtitle {
      font-size: 20px;
      color: rgba(255,255,255,0.75);
      max-width: 600px;
      margin: 0 auto 48px;
      line-height: 1.7;
      position: relative;
      z-index: 1;
    }

    /* URL 입력 섹션 */
    .url-input-section {
      max-width: 700px;
      margin: 0 auto;
      position: relative;
      z-index: 1;
    }

    .url-input-wrapper {
      display: flex;
      gap: 12px;
      background: rgba(255,255,255,0.03);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: 16px;
      padding: 8px;
    }

    .url-input {
      flex: 1;
      padding: 16px 20px;
      background: transparent;
      border: none;
      color: #fff;
      font-size: 16px;
      outline: none;
    }
    .url-input::placeholder {
      color: rgba(255,255,255,0.4);
    }

    .shorten-btn {
      padding: 16px 32px;
      background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
      color: #fff;
      border: none;
      border-radius: 12px;
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      transition: all 0.3s;
      white-space: nowrap;
      box-shadow: 0 4px 20px rgba(99, 102, 241, 0.35);
    }
    .shorten-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 30px rgba(99, 102, 241, 0.5);
    }

    /* 광고 섹션 */
    .ad-section {
      max-width: 800px;
      margin: 40px auto 0;
      text-align: center;
      position: relative;
      z-index: 1;
    }

    /* 기능 섹션 */
    .features-section {
      padding: 100px 24px;
      position: relative;
    }

    .features-section::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.1) 50%, transparent 100%);
    }

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

    .section-header {
      text-align: center;
      margin-bottom: 64px;
    }

    .section-badge {
      display: inline-block;
      padding: 8px 16px;
      background: rgba(99, 102, 241, 0.1);
      border: 1px solid rgba(99, 102, 241, 0.2);
      border-radius: 100px;
      font-size: 13px;
      font-weight: 600;
      color: #a78bfa;
      margin-bottom: 20px;
    }

    .section-title {
      font-size: 40px;
      font-weight: 800;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 18px;
      color: rgba(255,255,255,0.7);
      max-width: 600px;
      margin: 0 auto;
      line-height: 1.7;
    }

    /* 기능 그리드 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: rgba(255,255,255,0.02);
      border: 1px solid rgba(255,255,255,0.06);
      border-radius: 20px;
      padding: 32px;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      position: relative;
      overflow: hidden;
    }

    .feature-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, transparent 50%);
      opacity: 0;
      transition: opacity 0.3s;
    }

    .feature-card:hover {
      border-color: rgba(99, 102, 241, 0.3);
      transform: translateY(-4px);
      box-shadow: 0 20px 40px rgba(0,0,0,0.3);
    }

    .feature-card:hover::before {
      opacity: 1;
    }

    .feature-icon {
      width: 56px;
      height: 56px;
      background: linear-gradient(135deg, rgba(99, 102, 241, 0.2) 0%, rgba(139, 92, 246, 0.1) 100%);
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      position: relative;
      z-index: 1;
    }
    .feature-icon svg {
      width: 28px;
      height: 28px;
      color: #a78bfa;
    }

    .feature-card h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
      position: relative;
      z-index: 1;
    }

    .feature-card p {
      font-size: 15px;
      color: rgba(255,255,255,0.7);
      line-height: 1.7;
      position: relative;
      z-index: 1;
    }

    /* 경고 CTA */
    .warning-cta {
      max-width: 900px;
      margin: 0 auto 80px;
      padding: 0 24px;
    }

    .warning-box {
      background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(234, 88, 12, 0.05) 100%);
      border: 1px solid rgba(245, 158, 11, 0.2);
      border-radius: 20px;
      padding: 40px;
      text-align: center;
    }

    .warning-box h2 {
      font-size: 24px;
      font-weight: 700;
      color: #fbbf24;
      margin-bottom: 12px;
    }

    .warning-box p {
      font-size: 16px;
      color: rgba(255,255,255,0.75);
      margin-bottom: 24px;
      line-height: 1.7;
    }

    .warning-box .btn {
      padding: 14px 32px;
      background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
      color: #fff;
      border: none;
      border-radius: 12px;
      font-weight: 600;
      font-size: 15px;
      cursor: pointer;
      text-decoration: none;
      transition: all 0.3s;
      display: inline-block;
    }
    .warning-box .btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(245, 158, 11, 0.4);
    }

    /* CTA 섹션 */
    .cta-section {
      padding: 100px 24px;
    }

    .cta-box {
      max-width: 900px;
      margin: 0 auto;
      background: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(139, 92, 246, 0.1) 50%, rgba(168, 85, 247, 0.05) 100%);
      border: 1px solid rgba(99, 102, 241, 0.2);
      border-radius: 32px;
      padding: 80px 60px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .cta-box::before {
      content: '';
      position: absolute;
      top: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(99, 102, 241, 0.2) 0%, transparent 70%);
      pointer-events: none;
    }

    .cta-box h2 {
      font-size: 40px;
      font-weight: 800;
      margin-bottom: 16px;
      position: relative;
      z-index: 1;
      letter-spacing: -0.5px;
    }

    .cta-box p {
      font-size: 18px;
      color: rgba(255,255,255,0.75);
      margin-bottom: 32px;
      position: relative;
      z-index: 1;
    }

    .btn-primary {
      padding: 16px 40px;
      background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
      color: #fff;
      border: none;
      border-radius: 12px;
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      text-decoration: none;
      transition: all 0.3s;
      box-shadow: 0 4px 20px rgba(99, 102, 241, 0.35);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      position: relative;
      z-index: 1;
    }
    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 8px 30px rgba(99, 102, 241, 0.5);
    }

    /* 푸터 */
    footer {
      background: rgba(0,0,0,0.3);
      border-top: 1px solid rgba(255,255,255,0.06);
      padding: 60px 24px 40px;
    }

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

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 60px;
      margin-bottom: 40px;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 20px;
    }

    .footer-brand-icon {
      width: 40px;
      height: 40px;
      background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .footer-brand-icon svg { width: 22px; height: 22px; color: #fff; }
    .footer-brand-name { font-size: 24px; font-weight: 800; color: #fff; }

    .footer-info {
      color: rgba(255,255,255,0.65);
      font-size: 14px;
      line-height: 1.8;
    }

    .footer-column h2 {
      font-size: 15px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 20px;
    }

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

    .footer-column li {
      margin-bottom: 12px;
    }

    .footer-column a {
      color: rgba(255,255,255,0.7);
      text-decoration: none;
      font-size: 14px;
      transition: color 0.2s;
    }
    .footer-column a:hover {
      color: #fff;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.06);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
    }

    .footer-copyright {
      color: rgba(255,255,255,0.65);
      font-size: 14px;
    }

    .footer-links {
      display: flex;
      gap: 24px;
    }

    .footer-links a {
      color: rgba(255,255,255,0.7);
      text-decoration: none;
      font-size: 14px;
      transition: color 0.2s;
    }
    .footer-links a:hover {
      color: #fff;
    }

    /* 모바일 메뉴 */
    .mobile-menu {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(10, 10, 15, 0.98);
      backdrop-filter: blur(20px);
      z-index: 2000;
      padding: 80px 24px 40px;
      overflow-y: auto;
    }
    .mobile-menu.active {
      display: block;
    }
    .mobile-menu-close {
      position: absolute;
      top: 20px;
      right: 20px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .mobile-menu-close svg {
      width: 28px;
      height: 28px;
      color: #fff;
    }
    .mobile-menu-nav {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .mobile-menu-nav a {
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 16px 20px;
      color: rgba(255,255,255,0.8);
      text-decoration: none;
      border-radius: 12px;
      font-size: 16px;
      font-weight: 500;
      transition: all 0.2s;
    }
    .mobile-menu-nav a:hover {
      background: rgba(255,255,255,0.05);
      color: #fff;
    }
    .mobile-menu-nav .menu-icon {
      width: 44px;
      height: 44px;
      background: rgba(99, 102, 241, 0.15);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #a78bfa;
    }
    .mobile-menu-nav .menu-icon svg {
      width: 22px;
      height: 22px;
    }
    .mobile-menu-divider {
      height: 1px;
      background: rgba(255,255,255,0.1);
      margin: 16px 0;
    }
    .mobile-menu-auth {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-top: 24px;
    }
    .mobile-menu-auth .btn-login {
      display: block;
      padding: 16px 24px;
      background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
      color: #fff;
      text-align: center;
      text-decoration: none;
      border-radius: 12px;
      font-weight: 600;
      font-size: 16px;
    }

    /* 반응형 */
    @media (max-width: 1024px) {
      .features-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
      }
    }

    @media (max-width: 768px) {
      nav { padding: 0 16px; }
      .logo-title { font-size: 18px; }
      .nav-menu { display: none; }
      .mobile-menu-btn { display: block; }
      .nav-right .start-btn { display: none; }
      .user-menu { display: none !important; }

      .hero { padding: 140px 16px 60px; }
      .hero h1 { font-size: 32px; }
      .hero .subtitle { font-size: 16px; margin-bottom: 32px; }

      .url-input-wrapper {
        flex-direction: column;
      }
      .shorten-btn {
        width: 100%;
      }

      .features-section { padding: 60px 16px; }
      .section-title { font-size: 28px; }
      .features-grid { grid-template-columns: 1fr; }

      .warning-cta { padding: 0 16px; }
      .warning-box { padding: 32px 24px; }
      .warning-box h2 { font-size: 20px; }

      .cta-box { padding: 48px 24px; border-radius: 24px; }
      .cta-box h2 { font-size: 28px; }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
    }