:root {
      --bg-primary: #ffffff;
      --bg-secondary: #f8fafc;
      --text: #0f172a;
      --text-secondary: #64748b;
      --text-muted: #94a3b8;
      --border: #e2e8f0;
      --card: #ffffff;
      --primary: #6366f1;
      --primary-light: #818cf8;
      --primary-dark: #4f46e5;
      --secondary: #ec4899;
      --success: #10b981;
      --code-bg: #f1f5f9;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07);
      --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.08);
      --shadow-xl: 0 25px 50px -12px rgba(0,0,0,0.15);
      --glow: 0 0 40px rgba(99,102,241,0.3);
    }

    [data-theme="dark"] {
      --bg-primary: #0f172a;
      --bg-secondary: #1e293b;
      --text: #f1f5f9;
      --text-secondary: #cbd5e1;
      --text-muted: #94a3b8;
      --border: #334155;
      --card: #1e293b;
      --primary: #818cf8;
      --primary-light: #a5b4fc;
      --primary-dark: #6366f1;
      --secondary: #f472b6;
      --success: #34d399;
      --code-bg: #0f172a;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
      --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4);
      --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.6);
      --shadow-xl: 0 25px 50px -12px rgba(0,0,0,0.8);
      --glow: 0 0 60px rgba(129,140,248,0.4);
    }

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

    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
      background: var(--bg-primary);
      color: var(--text);
      line-height: 1.6;
      transition: background 0.4s ease, color 0.4s ease;
      overflow-x: hidden;
    }

    /* Animated Background */
    .animated-bg {
      position: fixed;
      inset: 0;
      z-index: -1;
      overflow: hidden;
      opacity: 0.15;
    }
    .animated-bg::before {
      content: '';
      position: absolute;
      width: 200%;
      height: 200%;
      background: 
        radial-gradient(circle at 20% 50%, var(--primary) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, var(--secondary) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, var(--primary-light) 0%, transparent 50%);
      animation: float 20s ease-in-out infinite;
    }
    @keyframes float {
      0%, 100% { transform: translate(0, 0) rotate(0deg); }
      33% { transform: translate(5%, 5%) rotate(120deg); }
      66% { transform: translate(-5%, 5%) rotate(240deg); }
    }

    /* Theme Toggle */
    .theme-toggle {
      position: fixed;
      top: 2rem;
      right: 2rem;
      z-index: 1000;
      width: 70px;
      height: 38px;
      background: var(--card);
      border: 2px solid var(--border);
      border-radius: 50px;
      padding: 3px;
      cursor: pointer;
      box-shadow: var(--shadow-lg);
      transition: all 0.3s ease;
      backdrop-filter: blur(10px);
    }
    .theme-toggle:hover { 
      transform: scale(1.08); 
      box-shadow: var(--glow);
    }
    .toggle-slider {
      width: 32px; 
      height: 32px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      border-radius: 50%;
      position: relative;
      transition: all 0.4s cubic-bezier(0.68,-.55,.27,1.55);
      display: flex; 
      align-items: center; 
      justify-content: center;
      box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    }
    [data-theme="dark"] .toggle-slider { 
      transform: translateX(32px); 
      background: linear-gradient(135deg, #fbbf24, #f59e0b);
    }
    .toggle-icon { width: 18px; height: 18px; position: absolute; transition: all 0.3s; }
    .sun-icon { opacity: 1; }
    .sun-icon path { fill: white; }
    .moon-icon { opacity: 0; }
    .moon-icon path { fill: #1e293b; }
    [data-theme="dark"] .sun-icon { opacity: 0; transform: rotate(90deg) scale(0.5); }
    [data-theme="dark"] .moon-icon { opacity: 1; transform: rotate(0) scale(1); }

    .container { max-width: 1200px; margin: 0 auto; padding: 2rem 1.5rem; }

    /* Header */
    header { 
      text-align: center; 
      padding: 8rem 0 5rem;
      position: relative;
    }
    .logo-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.75rem;
      padding: 0.5rem 1.25rem;
      background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(236,72,153,0.1));
      border: 1px solid var(--border);
      border-radius: 50px;
      margin-bottom: 2rem;
      font-weight: 600;
      color: var(--primary);
      font-size: 0.9rem;
      letter-spacing: 0.5px;
      backdrop-filter: blur(10px);
      animation: slideDown 0.8s ease;
    }
    .logo-badge::before {
      content: '⚡';
      font-size: 1.2rem;
    }
    h1 { 
      font-size: clamp(2.5rem, 8vw, 5rem);
      font-weight: 900;
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 50%, var(--primary-light) 100%);
      background-size: 200% 200%;
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 1.5rem;
      letter-spacing: -0.02em;
      animation: gradient 8s ease infinite, slideUp 0.8s ease;
    }
    @keyframes gradient { 
      0%, 100% { background-position: 0% 50%; }
      50% { background-position: 100% 50%; }
    }
    @keyframes slideUp {
      from { opacity: 0; transform: translateY(30px); }
      to { opacity: 1; transform: translateY(0); }
    }
    @keyframes slideDown {
      from { opacity: 0; transform: translateY(-20px); }
      to { opacity: 1; transform: translateY(0); }
    }
    .tagline { 
      font-size: clamp(1.1rem, 3vw, 1.5rem);
      color: var(--text-secondary); 
      max-width: 800px; 
      margin: 0 auto 3rem;
      line-height: 1.7;
      animation: slideUp 0.8s ease 0.2s both;
    }

    .status-badge { 
      display: inline-flex; 
      align-items: center; 
      gap: 0.8rem;
      background: linear-gradient(135deg, rgba(16,185,129,0.1), rgba(5,150,105,0.1));
      color: var(--success); 
      padding: 0.75rem 1.75rem;
      border-radius: 50px; 
      font-weight: 600;
      border: 1px solid rgba(16,185,129,0.3);
      box-shadow: var(--shadow-md);
      backdrop-filter: blur(10px);
      animation: slideUp 0.8s ease 0.4s both;
      font-size: 0.95rem;
    }
    .status-dot { 
      width: 10px; 
      height: 10px; 
      background: var(--success); 
      border-radius: 50%; 
      animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
      box-shadow: 0 0 0 0 var(--success);
    }
    @keyframes pulse { 
      0%, 100% { opacity: 1; box-shadow: 0 0 0 0 var(--success); }
      50% { opacity: 0.8; box-shadow: 0 0 0 4px transparent; }
    }

    /* Section Titles */
    .section-title { 
      font-size: clamp(2rem, 5vw, 3rem);
      font-weight: 800; 
      margin: 6rem 0 3rem;
      position: relative; 
      display: inline-block;
      background: linear-gradient(135deg, var(--text), var(--primary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .section-title::after { 
      content: ''; 
      position: absolute; 
      bottom: -12px; 
      left: 0;
      width: 80px; 
      height: 6px; 
      background: linear-gradient(90deg, var(--primary), var(--secondary));
      border-radius: 3px;
      animation: expandWidth 0.8s ease;
    }
    @keyframes expandWidth {
      from { width: 0; }
      to { width: 80px; }
    }

    /* Examples Grid */
    .examples-grid { 
      display: grid; 
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 2rem; 
      margin: 4rem 0;
    }
    .example-card {
      position: relative;
      border-radius: 20px;
      overflow: hidden;
      background: var(--card);
      border: 1px solid var(--border);
      box-shadow: var(--shadow-lg);
      transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
      cursor: pointer;
    }
    .example-card:hover { 
      transform: translateY(-12px) scale(1.02);
      box-shadow: var(--glow);
    }
    .example-img { 
      width: 100%; 
      height: 260px; 
      object-fit: cover;
      transition: transform 0.6s ease;
    }
    .example-card:hover .example-img {
      transform: scale(1.1);
    }
    .example-label {
      position: absolute;
      bottom: 1rem;
      left: 1rem;
      right: 1rem;
      padding: 0.75rem 1rem;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-radius: 12px;
      font-weight: 600;
      color: #1e293b;
      box-shadow: 0 4px 12px rgba(0,0,0,0.1);
      transform: translateY(100px);
      transition: transform 0.4s ease;
    }
    [data-theme="dark"] .example-label {
      background: rgba(30, 41, 59, 0.95);
      color: #f1f5f9;
    }
    .example-card:hover .example-label {
      transform: translateY(0);
    }

    /* Endpoints */
    .endpoints { 
      display: grid; 
      gap: 2rem; 
      margin-top: 3rem;
    }
    .endpoint-card { 
      background: var(--card); 
      border: 1px solid var(--border);
      border-radius: 24px; 
      padding: 2.5rem; 
      box-shadow: var(--shadow-lg);
      transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
      position: relative;
      overflow: hidden;
    }
    .endpoint-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: linear-gradient(90deg, var(--primary), var(--secondary));
      transform: scaleX(0);
      transition: transform 0.4s ease;
    }
    .endpoint-card:hover::before {
      transform: scaleX(1);
    }
    .endpoint-card:hover { 
      transform: translateY(-8px);
      box-shadow: var(--shadow-xl);
      border-color: var(--primary);
    }
    .endpoint-header { 
      display: flex; 
      align-items: center; 
      justify-content: space-between;
      flex-wrap: wrap; 
      gap: 1rem; 
      margin-bottom: 1.5rem;
    }
    .endpoint-title { 
      font-size: 1.75rem; 
      font-weight: 700;
      color: var(--text);
    }
    .method { 
      padding: 0.5rem 1.25rem; 
      border-radius: 10px; 
      font-size: 0.75rem; 
      font-weight: 700;
      text-transform: uppercase; 
      letter-spacing: 1px;
    }
    .get { 
      background: linear-gradient(135deg, #d1fae5, #a7f3d0); 
      color: #065f46;
    }
    .post { 
      background: linear-gradient(135deg, #dbeafe, #bfdbfe); 
      color: #1e40af;
    }
    .path { 
      font-family: 'JetBrains Mono', monospace; 
      color: var(--primary);
      font-weight: 600; 
      font-size: 1.15rem; 
      margin: 1rem 0;
      padding: 1rem;
      background: var(--code-bg);
      border-radius: 10px;
      border-left: 4px solid var(--primary);
    }
    .description, .params { 
      color: var(--text-secondary); 
      line-height: 1.8;
      font-size: 1.05rem;
    }
    .params { 
      margin: 1rem 0 1.5rem;
      font-family: 'JetBrains Mono', monospace;
      font-size: 0.9rem;
      color: var(--text-muted);
    }
    .try-btn { 
      display: inline-flex; 
      align-items: center; 
      gap: 0.75rem;
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      color: white; 
      padding: 0.9rem 1.75rem;
      border-radius: 12px; 
      text-decoration: none; 
      font-weight: 600;
      box-shadow: var(--shadow-md);
      transition: all 0.3s ease;
      font-size: 1rem;
    }
    .try-btn:hover { 
      transform: translateY(-2px);
      box-shadow: var(--glow);
    }
    .try-btn::after {
      content: '→';
      transition: transform 0.3s ease;
    }
    .try-btn:hover::after {
      transform: translateX(4px);
    }

    /* Playground */
    .playground-container {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: 28px;
      padding: 3rem;
      box-shadow: var(--shadow-xl);
      margin: 4rem 0;
      position: relative;
      overflow: hidden;
    }
    .playground-container::before {
      content: '';
      position: absolute;
      top: -50%;
      right: -50%;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle, rgba(99,102,241,0.05), transparent);
      pointer-events: none;
    }
    .playground-tabs {
      display: flex;
      gap: 0.75rem;
      margin-bottom: 2.5rem;
      flex-wrap: wrap;
    }
    .tab-btn {
      padding: 0.85rem 1.75rem;
      background: var(--bg-secondary);
      color: var(--text-muted);
      border: 1px solid var(--border);
      border-radius: 14px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.3s ease;
      font-size: 1rem;
    }
    .tab-btn:hover {
      background: var(--border);
      transform: translateY(-2px);
    }
    .tab-btn.active {
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      color: white;
      border-color: transparent;
      box-shadow: var(--shadow-md);
    }
    .tab-content { 
      display: none; 
      animation: fadeIn 0.5s ease;
    }
    .tab-content.active { display: block; }

    .input-group { margin-bottom: 1.5rem; }
    .input-group label {
      display: block;
      margin-bottom: 0.75rem;
      font-weight: 600;
      color: var(--text);
      font-size: 0.95rem;
    }
    .input-group input[type="text"],
    .input-group input[type="number"] {
      width: 100%;
      padding: 1rem 1.25rem;
      border: 2px solid var(--border);
      border-radius: 12px;
      background: var(--bg-primary);
      color: var(--text);
      font-size: 1rem;
      transition: all 0.3s ease;
      font-family: inherit;
    }
    .input-group input:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(99,102,241,0.1);
    }
    .input-group input[type="color"] {
      width: 100%;
      height: 56px;
      border: 2px solid var(--border);
      border-radius: 12px;
      cursor: pointer;
      transition: all 0.3s ease;
    }
    .input-group input[type="color"]:hover {
      border-color: var(--primary);
    }
    .input-row {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 1.5rem;
    }

    .generate-btn {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: white;
      border: none;
      padding: 1.25rem 2.5rem;
      border-radius: 14px;
      font-size: 1.1rem;
      font-weight: 700;
      cursor: pointer;
      width: 100%;
      margin-top: 2rem;
      transition: all 0.3s ease;
      box-shadow: var(--shadow-lg);
      position: relative;
      overflow: hidden;
    }
    .generate-btn::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, var(--secondary), var(--primary));
      opacity: 0;
      transition: opacity 0.3s ease;
    }
    .generate-btn:hover::before {
      opacity: 1;
    }
    .generate-btn span {
      position: relative;
      z-index: 1;
    }
    .generate-btn:hover { 
      transform: translateY(-3px);
      box-shadow: var(--glow);
    }
    .generate-btn:active {
      transform: translateY(-1px);
    }

    .result-area {
      margin-top: 3rem;
      border-top: 2px solid var(--border);
      padding-top: 2.5rem;
    }
    .result-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 1.5rem;
    }
    .result-header span {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text);
    }
    .copy-url-btn {
      background: var(--bg-secondary);
      color: var(--text);
      border: 1px solid var(--border);
      padding: 0.75rem 1.5rem;
      border-radius: 10px;
      cursor: pointer;
      font-size: 0.95rem;
      font-weight: 600;
      transition: all 0.3s ease;
    }
    .copy-url-btn:hover { 
      background: var(--primary);
      color: white;
      border-color: transparent;
      transform: translateY(-2px);
    }

    .image-preview {
      position: relative;
      border-radius: 20px;
      overflow: hidden;
      border: 2px solid var(--border);
      background: #000;
      box-shadow: var(--shadow-xl);
    }
    #preview {
      width: 100%;
      height: auto;
      max-height: 700px;
      object-fit: contain;
      display: block;
    }
    .loading {
      position: absolute;
      inset: 0;
      background: rgba(0,0,0,0.92);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 1.3rem;
      font-weight: 600;
    }
    .loading.hidden {
      display: none;
    }
    .spinner {
      width: 70px; 
      height: 70px;
      border: 6px solid rgba(255,255,255,0.1);
      border-top: 6px solid var(--primary);
      border-radius: 50%;
      animation: spin 0.8s linear infinite;
      margin-bottom: 1.5rem;
    }
    @keyframes spin { to { transform: rotate(360deg); } }
    @keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

    .url-display {
      margin-top: 1.5rem;
      padding: 1.5rem;
      background: var(--code-bg);
      border-radius: 14px;
      overflow-x: auto;
      border: 1px solid var(--border);
    }
    .url-display code {
      font-family: 'JetBrains Mono', monospace;
      color: var(--primary);
      word-break: break-all;
      font-size: 0.9rem;
      font-weight: 500;
    }

    /* Footer */
    footer { 
      text-align: center; 
      padding: 6rem 0 4rem;
      color: var(--text-muted);
      font-size: 1rem;
    }
    footer strong {
      color: var(--primary);
      font-weight: 700;
    }

    /* Responsive */
    @media (max-width: 768px) {
      header { padding: 5rem 0 3rem; }
      .theme-toggle { top: 1rem; right: 1rem; }
      .section-title { margin: 4rem 0 2rem; }
      .playground-container { padding: 2rem 1.5rem; }
      .endpoint-card { padding: 2rem; }
    }