/* ============================================
   404 PAGE CSS
   Страница ошибки с глитч-эффектом
   Использует переменные из global.css
   ============================================ */

/* ---------- Layout ---------- */
.error-page {
    position: relative;
    min-height: calc(100vh - 160px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: calc(80px + var(--space-2xl)) 0 var(--space-2xl);
    overflow: hidden;
}

.error-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

/* ---------- Glitch 404 ---------- */
.error-code {
    margin-bottom: var(--space-lg);
    user-select: none;
}

.error-code__glitch {
    position: relative;
    display: inline-block;
    font-size: clamp(100px, 25vw, 200px);
    font-weight: 900;
    line-height: 1;
    letter-spacing: -0.05em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: glitch-skew 4s infinite linear alternate-reverse;
}

/* Глитч-слои */
.error-code__glitch::before,
.error-code__glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: inherit;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.error-code__glitch::before {
    animation: glitch-1 2s infinite linear alternate-reverse;
    clip-path: polygon(0 0, 100% 0, 100% 35%, 0 35%);
    opacity: 0.8;
}

.error-code__glitch::after {
    animation: glitch-2 3s infinite linear alternate-reverse;
    clip-path: polygon(0 65%, 100% 65%, 100% 100%, 0 100%);
    opacity: 0.8;
}

@keyframes glitch-1 {
    0%, 90%, 100% { transform: translate(0); }
    92% { transform: translate(-8px, 2px); }
    94% { transform: translate(8px, -2px); }
    96% { transform: translate(-4px, 1px); }
    98% { transform: translate(4px, -1px); }
}

@keyframes glitch-2 {
    0%, 88%, 100% { transform: translate(0); }
    90% { transform: translate(6px, -3px); }
    93% { transform: translate(-6px, 3px); }
    95% { transform: translate(3px, -2px); }
    97% { transform: translate(-3px, 2px); }
}

@keyframes glitch-skew {
    0%, 95%, 100% { transform: skew(0deg); }
    96% { transform: skew(2deg); }
    97% { transform: skew(-1deg); }
    98% { transform: skew(1.5deg); }
    99% { transform: skew(-0.5deg); }
}

/* ---------- Text ---------- */
.error-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.error-text {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-xl);
}

/* ---------- Actions ---------- */
.error-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    justify-content: center;
    margin-bottom: var(--space-xl);
}

/* ---------- Quick Links ---------- */
.error-links {
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-color);
}

.error-links__label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
}

.error-links__list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: center;
}

.error-link {
    padding: 6px 14px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.error-link:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: rgba(0, 240, 255, 0.05);
    transform: translateY(-2px);
}

/* ---------- Decoration ---------- */
.error-decoration {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 1;
}

.error-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.3;
    animation: float 20s ease-in-out infinite;
}

.error-orb--1 {
    width: 400px;
    height: 400px;
    background: var(--color-secondary);
    top: 10%;
    left: -10%;
    animation-delay: -5s;
}

.error-orb--2 {
    width: 300px;
    height: 300px;
    background: var(--color-primary);
    bottom: 10%;
    right: -5%;
    animation-delay: -10s;
}

/* Сетка на фоне */
.error-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

/* ---------- Responsive ---------- */
@media (max-width: 480px) {
    .error-page {
        padding-top: calc(60px + var(--space-lg));
    }
    
    .error-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .error-actions .btn {
        justify-content: center;
    }
    
    .error-links__list {
        flex-direction: column;
        align-items: center;
    }
    
    .error-link {
        width: 100%;
        max-width: 200px;
        text-align: center;
    }
}

/* Уважение к prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
    .error-code__glitch,
    .error-code__glitch::before,
    .error-code__glitch::after,
    .error-orb {
        animation: none;
    }
}