:root {
    --color-bg: #050505;
    --color-surface: #161616;
    --color-text-main: #FFFFFF;
    --color-text-muted: #A0A0A0;
    --color-accent: #FF6B00;
    --color-accent-hover: #FF8533;
    
    --radius-btn: 14px;
    --font-brand: 'MuseoModerno', display;
    --font-body: 'Inter', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text-main);
    font-family: var(--font-body);
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background-image: radial-gradient(circle at 50% 50%, #1a0f00 0%, #050505 70%);
    overflow: hidden;
}

.container {
    text-align: center;
    max-width: 600px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    animation: fadeIn 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.error-code {
    font-family: var(--font-brand);
    font-weight: 800;
    font-size: 10rem;
    line-height: 0.8;
    color: var(--color-accent);
    letter-spacing: -5px;
    text-shadow: 0 0 40px rgba(255, 107, 0, 0.2);
    position: relative;
    display: inline-block;
}

.ghost-icon {
    font-size: 4rem;
    color: var(--color-surface);
    position: absolute;
    top: -20px;
    right: -20px;
    z-index: -1;
    transform: rotate(15deg);
}

.headline {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: 10px;
}

.description {
    color: var(--color-text-muted);
    font-size: 1rem;
    line-height: 1.5;
    max-width: 400px;
    margin-bottom: 10px;
}

.btn {
    border: none;
    outline: none;
    cursor: pointer;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 1rem;
    padding: 16px 32px;
    border-radius: var(--radius-btn);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    text-decoration: none;
    background-color: var(--color-accent);
    color: #000;
    transition: transform 0.6s cubic-bezier(0.83, 0, 0.17, 1), background-color 0.2s ease, box-shadow 0.6s cubic-bezier(0.83, 0, 0.17, 1);
}

.btn:hover {
    background-color: var(--color-accent-hover);
    transform: scale(1.04);
    box-shadow: 0 10px 30px rgba(255, 107, 0, 0.3);
}

.btn:active {
    transform: scale(0.98);
}

footer {
    position: absolute;
    bottom: 30px;
    color: var(--color-text-muted);
    font-size: 0.75rem;
    opacity: 0.3;
}

@media (max-width: 550px) {
    .error-code {
        font-size: 6rem;
    }
    
    .headline {
        font-size: 1.2rem;
    }

    .description {
        font-size: 0.9rem;
        padding: 0 20px;
    }
}