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| 1 | +<!DOCTYPE html> |
| 2 | +<html lang="en"> |
| 3 | +<head> |
| 4 | + <meta charset="UTF-8" /> |
| 5 | + <meta name="viewport" content="width=device-width, initial-scale=1.0" /> |
| 6 | + <title>404 — Not Found</title> |
| 7 | + <style> |
| 8 | + *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; } |
| 9 | + |
| 10 | + :root { |
| 11 | + --bg: #0f172a; |
| 12 | + --surface: #1e293b; |
| 13 | + --border: #334155; |
| 14 | + --accent: #38bdf8; |
| 15 | + --accent-2: #818cf8; |
| 16 | + --text: #f1f5f9; |
| 17 | + --muted: #94a3b8; |
| 18 | + --red: #f87171; |
| 19 | + --radius: 10px; |
| 20 | + } |
| 21 | + |
| 22 | + body { |
| 23 | + font-family: "Outfit", ui-rounded, system-ui, -apple-system, sans-serif; |
| 24 | + background: var(--bg); |
| 25 | + color: var(--text); |
| 26 | + min-height: 100vh; |
| 27 | + display: flex; |
| 28 | + flex-direction: column; |
| 29 | + align-items: center; |
| 30 | + justify-content: center; |
| 31 | + padding: 40px 20px; |
| 32 | + position: relative; |
| 33 | + overflow-x: hidden; |
| 34 | + } |
| 35 | + |
| 36 | + body::before { |
| 37 | + content: ""; |
| 38 | + position: fixed; |
| 39 | + inset: 0; |
| 40 | + background: |
| 41 | + radial-gradient(ellipse 70% 45% at 50% -5%, rgba(248,113,113,.09) 0%, transparent 70%), |
| 42 | + radial-gradient(ellipse 55% 35% at 85% 85%, rgba(129,140,248,.07) 0%, transparent 60%); |
| 43 | + pointer-events: none; |
| 44 | + z-index: 0; |
| 45 | + } |
| 46 | + |
| 47 | + body::after { |
| 48 | + content: ""; |
| 49 | + position: fixed; |
| 50 | + inset: 0; |
| 51 | + background-image: radial-gradient(rgba(148,163,184,.1) 1px, transparent 1px); |
| 52 | + background-size: 28px 28px; |
| 53 | + pointer-events: none; |
| 54 | + z-index: 0; |
| 55 | + } |
| 56 | + |
| 57 | + .card { |
| 58 | + position: relative; |
| 59 | + z-index: 1; |
| 60 | + background: var(--surface); |
| 61 | + border: 1px solid var(--border); |
| 62 | + border-radius: 16px; |
| 63 | + padding: 44px 48px; |
| 64 | + max-width: 560px; |
| 65 | + width: 100%; |
| 66 | + box-shadow: 0 24px 64px rgba(0,0,0,.4); |
| 67 | + text-align: center; |
| 68 | + } |
| 69 | + |
| 70 | + .code { |
| 71 | + font-size: clamp(4rem, 18vw, 7rem); |
| 72 | + font-weight: 800; |
| 73 | + line-height: 1; |
| 74 | + background: linear-gradient(135deg, var(--red) 0%, rgba(248,113,113,.5) 100%); |
| 75 | + -webkit-background-clip: text; |
| 76 | + background-clip: text; |
| 77 | + -webkit-text-fill-color: transparent; |
| 78 | + margin-bottom: 16px; |
| 79 | + letter-spacing: -.03em; |
| 80 | + } |
| 81 | + |
| 82 | + h1 { |
| 83 | + font-size: 1.3rem; |
| 84 | + font-weight: 600; |
| 85 | + margin-bottom: 10px; |
| 86 | + } |
| 87 | + |
| 88 | + .sub { |
| 89 | + color: var(--muted); |
| 90 | + font-size: .92rem; |
| 91 | + line-height: 1.65; |
| 92 | + margin-bottom: 36px; |
| 93 | + } |
| 94 | + |
| 95 | + .actions { |
| 96 | + display: flex; |
| 97 | + align-items: center; |
| 98 | + justify-content: center; |
| 99 | + flex-wrap: wrap; |
| 100 | + gap: 10px; |
| 101 | + } |
| 102 | + |
| 103 | + .btn { |
| 104 | + display: inline-flex; |
| 105 | + align-items: center; |
| 106 | + gap: 7px; |
| 107 | + border-radius: 9px; |
| 108 | + padding: 10px 20px; |
| 109 | + font-size: .87rem; |
| 110 | + font-weight: 600; |
| 111 | + text-decoration: none; |
| 112 | + cursor: pointer; |
| 113 | + border: none; |
| 114 | + transition: opacity .15s, background .15s, border-color .15s; |
| 115 | + font-family: inherit; |
| 116 | + } |
| 117 | + |
| 118 | + .btn-primary { |
| 119 | + background: var(--accent); |
| 120 | + color: #0f172a; |
| 121 | + } |
| 122 | + |
| 123 | + .btn-primary:hover { opacity: .88; } |
| 124 | + |
| 125 | + .btn-ghost { |
| 126 | + background: transparent; |
| 127 | + color: var(--muted); |
| 128 | + border: 1px solid var(--border); |
| 129 | + } |
| 130 | + |
| 131 | + .btn-ghost:hover { |
| 132 | + border-color: var(--accent); |
| 133 | + color: var(--accent); |
| 134 | + } |
| 135 | + |
| 136 | + .divider { |
| 137 | + border: none; |
| 138 | + border-top: 1px solid var(--border); |
| 139 | + margin: 32px 0 24px; |
| 140 | + } |
| 141 | + |
| 142 | + .brand { |
| 143 | + display: inline-flex; |
| 144 | + align-items: center; |
| 145 | + gap: 8px; |
| 146 | + font-size: .82rem; |
| 147 | + color: var(--muted); |
| 148 | + text-decoration: none; |
| 149 | + } |
| 150 | + |
| 151 | + .brand-logo { |
| 152 | + width: 20px; |
| 153 | + height: 20px; |
| 154 | + border-radius: 5px; |
| 155 | + background: linear-gradient(135deg, var(--accent), var(--accent-2)); |
| 156 | + display: flex; |
| 157 | + align-items: center; |
| 158 | + justify-content: center; |
| 159 | + font-weight: 800; |
| 160 | + font-size: .6rem; |
| 161 | + color: #0f172a; |
| 162 | + letter-spacing: -.5px; |
| 163 | + flex-shrink: 0; |
| 164 | + } |
| 165 | + |
| 166 | + .brand:hover { color: var(--text); } |
| 167 | + |
| 168 | + @media (max-width: 500px) { |
| 169 | + .card { padding: 32px 24px; } |
| 170 | + } |
| 171 | + </style> |
| 172 | +</head> |
| 173 | +<body> |
| 174 | + <div class="card"> |
| 175 | + <div class="code">404</div> |
| 176 | + <h1>Page not found</h1> |
| 177 | + <p class="sub"> |
| 178 | + The page you're looking for doesn't exist or has been moved.<br> |
| 179 | + Double-check the URL or head back home. |
| 180 | + </p> |
| 181 | + |
| 182 | + <div class="actions"> |
| 183 | + <a href="/" class="btn btn-primary"> |
| 184 | + <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"> |
| 185 | + <path d="M3 9l9-7 9 7v11a2 2 0 01-2 2H5a2 2 0 01-2-2z"/><polyline points="9 22 9 12 15 12 15 22"/> |
| 186 | + </svg> |
| 187 | + Go home |
| 188 | + </a> |
| 189 | + <button class="btn btn-ghost" onclick="history.back()"> |
| 190 | + <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"> |
| 191 | + <polyline points="15 18 9 12 15 6"/> |
| 192 | + </svg> |
| 193 | + Go back |
| 194 | + </button> |
| 195 | + </div> |
| 196 | + |
| 197 | + <hr class="divider" /> |
| 198 | + |
| 199 | + <a href="https://21no.de" class="brand"> |
| 200 | + <div class="brand-logo">21</div> |
| 201 | + <span>Served by static-web — BackendStack21</span> |
| 202 | + </a> |
| 203 | + </div> |
| 204 | +</body> |
| 205 | +</html> |
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