/* =============================================
   ERROR PAGES STYLESHEET
   Shared styles for 404.html and offline.html

   NOTE: This file is designed to work WITH styles.css
   which provides CSS variables, reset, and base styles.
   ============================================= */

/* ===== Error Page Body Layout ===== */
/* Override body styles specifically for error pages */
body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    position: relative;
    text-align: center;
    padding: 2rem;
}

/* ===== Logo Styles ===== */
.logo {
    position: absolute;
    top: 24px;
    left: 24px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
    z-index: 10;
}

.logo:hover {
    color: var(--color-primary-dark);
}

/* Alternative logo style (circular, for offline page) */
.logo-circle {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    box-shadow: 0 4px 20px rgba(var(--color-primary-rgb), 0.3);
}

/* ===== Theme Toggle (Error Pages Override) ===== */
/* Extends base .theme-toggle from styles.css with error page specific positioning */
.theme-toggle {
    position: absolute;
    top: 24px;
    right: 24px;
    background: var(--color-card-bg);
    width: 48px;
    height: 48px;
    font-size: 1.25rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 10;
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 20px rgba(var(--color-primary-rgb), 0.3);
}

/* ===== Error Container ===== */
.error-container {
    text-align: center;
    z-index: 1;
    padding: 40px;
    max-width: 600px;
}

.offline-container {
    max-width: 500px;
    width: 100%;
}

/* ===== Error Titles & Messages ===== */
.error-title {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: 16px;
}

[data-theme="dark"] .error-title {
    color: var(--color-primary);
}

.error-message {
    font-size: 1.1rem;
    color: var(--color-text-light);
    margin-bottom: 32px;
    line-height: 1.7;
}

/* General heading styles for error pages */
.error-container h1,
.offline-container h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.message {
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 2rem;
    opacity: 0.8;
}

/* ===== Button Layout (Error Pages Specific) ===== */
/* Note: Base .btn, .btn-primary, .btn-secondary styles come from styles.css */

.button-group {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Error page buttons need gap for icon + text */
.error-container .btn,
.offline-container .btn {
    gap: 8px;
}

/* Gradient variant for btn-primary (error pages only) */
.btn-primary.gradient {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    box-shadow: 0 4px 15px rgba(var(--color-primary-rgb), 0.3);
    animation: none; /* Override buttonPulse from styles.css */
}

.btn-primary.gradient:hover {
    box-shadow: 0 6px 20px rgba(var(--color-primary-rgb), 0.4);
}

/* ===== Particles Background (404 page) ===== */
.particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 0;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--color-primary);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 15s infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
        opacity: 0.3;
    }
    50% {
        transform: translateY(-100px) rotate(180deg);
        opacity: 0.6;
    }
}

/* ===== Error Icon (404 page) ===== */
.error-icon {
    font-size: 48px;
    color: var(--color-primary);
    margin-bottom: 24px;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* ===== 404 Error Code with Glitch Effect ===== */
.error-code {
    font-size: clamp(100px, 20vw, 200px);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 16px;
    position: relative;
    text-shadow:
        2px 0 var(--color-primary-dark),
        -2px 0 var(--color-surface);
    animation: glitch 2s ease-in-out infinite;
}

@keyframes glitch {
    0%, 100% {
        text-shadow:
            2px 0 var(--color-primary-dark),
            -2px 0 var(--color-surface);
    }
    25% {
        text-shadow:
            -2px 0 var(--color-primary-dark),
            2px 0 var(--color-surface);
    }
    50% {
        text-shadow:
            2px 2px var(--color-primary-dark),
            -2px -2px var(--color-surface);
    }
    75% {
        text-shadow:
            -2px 2px var(--color-primary-dark),
            2px -2px var(--color-surface);
    }
}

/* ===== Language Hints (404 page) ===== */
.lang-hints {
    position: absolute;
    bottom: 24px;
    display: flex;
    gap: 16px;
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.lang-hint {
    opacity: 0.7;
}

/* ===== Offline Page Specific Styles ===== */

/* WiFi Icon */
.offline-icon {
    width: 120px;
    height: 120px;
    margin: 0 auto 2rem;
    position: relative;
}

.offline-icon svg {
    width: 100%;
    height: 100%;
}

.wifi-wave {
    fill: none;
    stroke: var(--color-primary);
    stroke-width: 4;
    stroke-linecap: round;
    opacity: 0.3;
}

.wifi-wave.active {
    animation: pulse 2s infinite;
}

.wifi-base {
    fill: var(--color-primary);
}

.wifi-slash {
    stroke: var(--color-primary-dark);
    stroke-width: 6;
    stroke-linecap: round;
}

@keyframes pulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.8; }
}

/* Tips Section */
.tips {
    background: var(--color-card-bg);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    text-align: left;
}

.tips h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tips ul {
    list-style: none;
    padding: 0;
}

.tips li {
    padding: 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.95rem;
}

.tips li::before {
    content: "\2022";
    color: var(--color-primary);
    font-weight: bold;
}

/* Status Indicator */
.status {
    margin-top: 2rem;
    padding: 1rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    font-size: 0.9rem;
    background: rgba(var(--color-primary-rgb), 0.1);
    color: var(--color-primary-dark);
}

.status.online {
    background: rgba(34, 197, 94, 0.1);
    color: #16a34a;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: currentColor;
    animation: blink 1.5s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Footer */
.footer {
    margin-top: 3rem;
    font-size: 0.875rem;
    opacity: 0.6;
}

/* ===== Responsive Styles ===== */
@media (max-width: 480px) {
    .error-container {
        padding: 24px;
    }

    .button-group {
        flex-direction: column;
    }

    .button-group .btn,
    .buttons .btn {
        width: 100%;
    }

    .offline-container h1 {
        font-size: 1.5rem;
    }

    .message {
        font-size: 1rem;
    }

    .offline-icon {
        width: 100px;
        height: 100px;
    }

    .lang-hints {
        flex-direction: column;
        gap: 8px;
    }
}