/* Quantum-Note Error Pages - Shared Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0a0a23 0%, #1a1a3a 50%, #2a2a4a 100%);
    color: #ffffff;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    position: relative;
}

/* Animated background particles */
.particle {
    position: absolute;
    border-radius: 50%;
    background: rgba(0, 255, 65, 0.3);
    animation: float 6s ease-in-out infinite;
    pointer-events: none;
}

.particle:nth-child(odd) {
    background: rgba(0, 128, 255, 0.3);
    animation-duration: 8s;
    animation-delay: -2s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

/* Main error container */
.error-container {
    text-align: center;
    max-width: 800px;
    padding: 2rem;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 20px;
    border: 1px solid rgba(0, 255, 65, 0.2);
    box-shadow: 0 0 30px rgba(0, 128, 255, 0.1);
    backdrop-filter: blur(10px);
    z-index: 10;
    position: relative;
}

.error-code {
    font-size: 6rem;
    font-weight: bold;
    background: linear-gradient(45deg, #00ff41, #0080ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
    text-shadow: 0 0 20px rgba(0, 255, 65, 0.5);
    animation: pulse-glow 2s ease-in-out infinite alternate;
}

@keyframes pulse-glow {
    from { filter: brightness(1); }
    to { filter: brightness(1.2); }
}

.error-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #ffffff;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

.error-description {
    font-size: 1.2rem;
    line-height: 1.6;
    margin-bottom: 2rem;
    color: #cccccc;
}

.svg-container {
    margin: 2rem 0;
    display: flex;
    justify-content: center;
}

.back-button {
    background: linear-gradient(45deg, #00ff41, #0080ff);
    color: #000000;
    border: none;
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: bold;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 4px 15px rgba(0, 128, 255, 0.3);
    margin: 0 10px;
}

.back-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(0, 128, 255, 0.5);
    filter: brightness(1.1);
}

.back-button:active {
    transform: translateY(-1px);
}

.home-button {
    background: linear-gradient(45deg, #ff4500, #ff6500);
    color: #ffffff;
}

.home-button:hover {
    box-shadow: 0 6px 25px rgba(255, 69, 0, 0.5);
}

/* Footer info */
.error-footer {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    color: #888888;
}

.quantum-note-brand {
    color: #00ff41;
    font-weight: bold;
    text-decoration: none;
    transition: color 0.3s ease;
}

.quantum-note-brand:hover {
    color: #0080ff;
}

/* Responsive design */
@media (max-width: 768px) {
    .error-code {
        font-size: 4rem;
    }

    .error-title {
        font-size: 2rem;
    }

    .error-container {
        margin: 1rem;
        padding: 1.5rem;
    }

    .back-button {
        padding: 12px 25px;
        font-size: 1rem;
        margin: 5px;
    }
}

@media (max-width: 480px) {
    .error-code {
        font-size: 3rem;
    }

    .error-title {
        font-size: 1.5rem;
    }

    .error-description {
        font-size: 1rem;
    }
}