<!DOCTYPE html>
<html lang="ko">

    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="_csrf" content="ffbbad0e-342d-48f9-b2a2-4665b0d4d948"/>
    <meta name="_csrf_header" content="X-CSRF-TOKEN"/>
    <link rel="icon" type="image/svg+xml" href="/favicon.svg">
    <title>오류 - Song Quiz</title>
    <!-- FOUC 방지: CSS 로드 전 테마 적용 -->
    <script>
        (function() {
            try {
                var saved = localStorage.getItem('theme-preference');
                var prefersDark = window.matchMedia('(prefers-color-scheme: dark)').matches;
                var theme = saved || (prefersDark ? 'dark' : 'light');
                document.documentElement.setAttribute('data-theme', theme);
            } catch (e) {
                document.documentElement.setAttribute('data-theme', 'light');
            }

            // 게임 페이지(.game-page)에서 다크 테마 강제
            document.addEventListener('DOMContentLoaded', function() {
                if (document.body.classList.contains('game-page')) {
                    document.documentElement.setAttribute('data-theme', 'dark');
                }
            });
        })();
    </script>
    <link rel="stylesheet" href="/css/common/common.css">
    <link rel="stylesheet" href="/css/client/client.css">
    <script src="/js/common/theme-toggle.js" defer></script>
    <script src="/js/common/common.js" defer></script>

<body class="client-page">
<div class="client-container">
    <div class="error-page-wrapper">
        <div class="error-page-icon">⚠</div>
        <h1 class="error-page-title">오류가 발생했습니다</h1>
        <p class="error-page-message">서버 오류가 발생했습니다.</p>
        
        <div class="error-page-actions">
            <a href="/" class="btn btn-primary">홈으로 이동</a>
            <button class="btn btn-secondary" onclick="history.back()">이전 페이지</button>
        </div>
    </div>
</div>

<style>
    /* ========================================
       에러 페이지 - 기본 스타일 (라이트 모드 + PC)
       ======================================== */
    .error-page-wrapper {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        min-height: 60vh;
        padding: 2rem;
        text-align: center;
    }
    .error-page-icon {
        font-size: 4rem;
        margin-bottom: 1rem;
        opacity: 0.7;
    }
    .error-page-title {
        font-size: 1.5rem;
        color: var(--text-primary);
        margin-bottom: 0.75rem;
        font-weight: 700;
    }
    .error-page-message {
        font-size: 1rem;
        color: var(--text-secondary);
        margin-bottom: 1rem;
        max-width: 30rem;
        line-height: 1.6;
    }
    .error-page-status {
        font-size: 0.875rem;
        color: var(--text-muted);
        margin-bottom: 1.5rem;
    }
    .error-page-actions {
        display: flex;
        gap: 0.75rem;
    }
    .error-page-actions .btn {
        padding: 0.625rem 1.5rem;
        border-radius: 0.5rem;
        font-size: 0.95rem;
        text-decoration: none;
        cursor: pointer;
        border: none;
        transition: opacity 0.2s;
    }
    .error-page-actions .btn:hover {
        opacity: 0.85;
    }
    .error-page-actions .btn-primary {
        background: var(--accent-primary);
        color: white;
    }
    .error-page-actions .btn-secondary {
        background: var(--bg-elevated);
        color: var(--text-primary);
        border: 1px solid var(--border-color);
    }

    /* ========================================
       에러 페이지 - 태블릿 (768px 이하)
       ======================================== */
    @media (max-width: 768px) {
        .error-page-wrapper {
            padding: 1.5rem;
        }
        .error-page-icon {
            font-size: 3rem;
        }
        .error-page-title {
            font-size: 1.25rem;
        }
    }

    /* ========================================
       에러 페이지 - 모바일 (480px 이하)
       ======================================== */
    @media (max-width: 480px) {
        .error-page-wrapper {
            padding: 1rem;
        }
        .error-page-icon {
            font-size: 2.5rem;
        }
        .error-page-title {
            font-size: 1.1rem;
        }
        .error-page-actions {
            flex-direction: column;
            width: 100%;
        }
        .error-page-actions .btn {
            width: 100%;
            text-align: center;
        }
    }
</style>
</body>
</html>
