/* ========================================
   PHP 블로그 Bootstrap 5.3 공식 다크모드
   ======================================== */

/* 기본 스타일 - 라이트 모드 */
:root {
    --bs-body-font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --bs-body-line-height: 1.6;
    
    /* 라이트 모드 색상 */
    --bs-body-color: #2c3e50;
    --bs-body-bg: #ffffff;
    --bs-body-secondary-color: #6c757d;
    --bs-body-secondary-bg: #f8f9fa;
    --bs-body-tertiary-color: #adb5bd;
    --bs-body-tertiary-bg: #e9ecef;
    --bs-body-emphasis-color: #1a1a1a;
    --bs-border-color: #dee2e6;
    --bs-border-color-translucent: rgba(0, 0, 0, 0.125);
    --bs-heading-color: #2c3e50;
    --bs-link-color: #0d6efd;
    --bs-link-hover-color: #0a58ca;
    --bs-code-color: #d63384;
    --bs-mark-color: #2c3e50;
    --bs-mark-bg: #fff3cd;
    
    /* 라이트 모드 컴포넌트 색상 */
    --bs-card-bg: #ffffff;
    --bs-card-border: #dee2e6;
    --bs-navbar-bg: #ffffff;
    --bs-navbar-border: #dee2e6;
    --bs-hero-bg: #e3f2fd;
    --bs-hero-border: #bbdefb;
    --bs-stats-bg: #f8f9fa;
    --bs-stats-border: #dee2e6;
    --bs-btn-primary-bg: #0d6efd;
    --bs-btn-primary-border: #0d6efd;
    --bs-btn-primary-hover: #0b5ed7;
    --bs-btn-outline-border: #6c757d;
    --bs-btn-outline-hover: #6c757d;
    --bs-alert-success-bg: #d1e7dd;
    --bs-alert-success-border: #badbcc;
    --bs-alert-success-color: #0f5132;
    --bs-alert-info-bg: #cff4fc;
    --bs-alert-info-border: #b6effb;
    --bs-alert-info-color: #055160;
    --bs-alert-warning-bg: #fff3cd;
    --bs-alert-warning-border: #ffecb5;
    --bs-alert-warning-color: #664d03;
    --bs-alert-danger-bg: #f8d7da;
    --bs-alert-danger-border: #f5c2c7;
    --bs-alert-danger-color: #842029;
}

/* 다크모드 스타일 */
[data-bs-theme="dark"] {
    /* 다크모드 색상 */
    --bs-body-color: #e9ecef;
    --bs-body-bg: #0d1117;
    --bs-body-secondary-color: #b0b7c3;
    --bs-body-secondary-bg: #161b22;
    --bs-body-tertiary-color: #7d8590;
    --bs-body-tertiary-bg: #21262d;
    --bs-body-emphasis-color: #ffffff;
    --bs-border-color: #30363d;
    --bs-border-color-translucent: rgba(255, 255, 255, 0.15);
    --bs-heading-color: #ffffff;
    --bs-link-color: #58a6ff;
    --bs-link-hover-color: #79c0ff;
    --bs-code-color: #f78166;
    --bs-mark-color: #e9ecef;
    --bs-mark-bg: #9e6a03;
    
    /* 다크모드 컴포넌트 색상 */
    --bs-card-bg: #161b22;
    --bs-card-border: #30363d;
    --bs-navbar-bg: #161b22;
    --bs-navbar-border: #30363d;
    --bs-hero-bg: #0d1117;
    --bs-hero-border: #30363d;
    --bs-stats-bg: #21262d;
    --bs-stats-border: #30363d;
    --bs-btn-primary-bg: #238636;
    --bs-btn-primary-border: #238636;
    --bs-btn-primary-hover: #2ea043;
    --bs-btn-outline-border: #30363d;
    --bs-btn-outline-hover: #21262d;
    --bs-alert-success-bg: #0c532a;
    --bs-alert-success-border: #1b4f23;
    --bs-alert-success-color: #7ee787;
    --bs-alert-info-bg: #0c2d6b;
    --bs-alert-info-border: #1b4f23;
    --bs-alert-info-color: #79c0ff;
    --bs-alert-warning-bg: #3e2200;
    --bs-alert-warning-border: #2d1a00;
    --bs-alert-warning-color: #f2cc60;
    --bs-alert-danger-bg: #3d1300;
    --bs-alert-danger-border: #2d0e00;
    --bs-alert-danger-color: #ff7b72;
}

/* 기본 스타일 */
body {
    font-family: var(--bs-body-font-family);
    line-height: var(--bs-body-line-height);
    background-color: var(--bs-body-bg);
    color: var(--bs-body-color);
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* 네비게이션 바 */
.navbar {
    background-color: var(--bs-navbar-bg) !important;
    border-bottom: 1px solid var(--bs-navbar-border);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.navbar-brand {
    color: var(--bs-primary) !important;
    font-weight: 600;
}

.nav-link {
    color: var(--bs-body-color) !important;
    transition: color 0.15s ease-in-out;
    font-weight: 400;
    position: relative;
}

.nav-link:hover {
    color: var(--bs-primary) !important;
}

.nav-link.active {
    color: var(--bs-primary) !important;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--bs-primary);
    border-radius: 1px;
}

/* 드롭다운 메뉴 */
.dropdown-menu {
    background-color: var(--bs-card-bg);
    border: 1px solid var(--bs-card-border);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    border-radius: 0.375rem;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.dropdown-item {
    color: var(--bs-body-color);
    /* transition: all 0.15s ease-in-out; */
    border-radius: 0.25rem;
    /* margin: 2px 8px; */
}

.dropdown-item:hover {
    background-color: var(--bs-body-tertiary-bg);
    color: var(--bs-body-emphasis-color);
    /* transform: translateX(2px); */
}

/* Hero 섹션 */
.hero-section {
    background-color: var(--bs-hero-bg);
    color: var(--bs-body-emphasis-color);
    padding: 80px 0;
    margin-bottom: 40px;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--bs-hero-border);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(88, 166, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(88, 166, 255, 0.1) 0%, transparent 50%);
    opacity: 0.3;
}

.hero-section .container {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--bs-body-emphasis-color);
}

.hero-subtitle {
    font-size: 1.125rem;
    font-weight: 400;
    margin-bottom: 24px;
    color: var(--bs-body-secondary-color);
}

/* 버튼 스타일 */
.btn-custom {
    border-radius: 0.375rem;
    padding: 0.5rem 1rem;
    font-weight: 500;
    transition: all 0.15s ease-in-out;
    border: none;
    font-size: 1rem;
}

.btn-custom:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.btn-primary {
    background-color: var(--bs-btn-primary-bg);
    color: #ffffff;
    border: 1px solid var(--bs-btn-primary-border);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.btn-primary:hover {
    background-color: var(--bs-btn-primary-hover);
    border-color: var(--bs-btn-primary-hover);
    box-shadow: 0 4px 8px rgba(88, 166, 255, 0.25);
}

.btn-outline-light {
    background-color: transparent;
    border: 1px solid var(--bs-btn-outline-border);
    color: var(--bs-body-color);
    transition: all 0.3s ease;
}

.btn-outline-light:hover {
    background-color: var(--bs-btn-outline-hover);
    border-color: var(--bs-btn-outline-hover);
    color: var(--bs-body-emphasis-color);
}

/* 카드 스타일 */
.card {
    background-color: var(--bs-card-bg);
    border: 1px solid var(--bs-card-border);
    border-radius: 0.375rem;
    transition: all 0.15s ease-in-out, background-color 0.3s ease, border-color 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--bs-primary);
    transform: scaleX(0);
    transition: transform 0.15s ease-in-out;
}

.card:hover::before {
    transform: scaleX(1);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
    border-color: var(--bs-primary);
}

.card-body {
    color: var(--bs-body-color);
    padding: 1.25rem;
}

.card-title a {
    color: var(--bs-body-emphasis-color) !important;
    text-decoration: none;
    transition: color 0.15s ease-in-out;
    font-weight: 600;
}

.card-title a:hover {
    color: var(--bs-primary) !important;
}

.card-text {
    color: var(--bs-body-secondary-color) !important;
    line-height: 1.5;
}

.card-footer {
    background-color: var(--bs-body-tertiary-bg);
    border-top: 1px solid var(--bs-card-border);
    padding: 0.75rem 1.25rem;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

/* 섹션 제목 */
.section-title {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 40px;
    text-align: center;
    color: var(--bs-body-emphasis-color);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background-color: var(--bs-primary);
    border-radius: 1px;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--bs-body-secondary-color);
    text-align: center;
    margin-bottom: 48px;
    font-weight: 400;
}

/* 통계 섹션 */
.stats-section {
    background-color: var(--bs-stats-bg);
    padding: 60px 0;
    margin: 40px 0;
    border-top: 1px solid var(--bs-stats-border);
    border-bottom: 1px solid var(--bs-stats-border);
    position: relative;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.stats-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(88, 166, 255, 0.05) 0%, transparent 70%);
}

.stat-item {
    text-align: center;
    padding: 24px 16px;
    position: relative;
    z-index: 1;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--bs-primary);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 1rem;
    color: var(--bs-body-secondary-color);
    font-weight: 500;
}

/* 폼 스타일 - Bootstrap 기본 스타일 사용 */
/* 커스텀 폼 스타일 제거하고 Bootstrap 기본 스타일 사용 */

/* 알림 메시지 */
.alert {
    border: 1px solid var(--bs-border-color);
    border-radius: 0.375rem;
    padding: 0.75rem 1rem;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.alert-success {
    background-color: var(--bs-alert-success-bg);
    border-color: var(--bs-alert-success-border);
    color: var(--bs-alert-success-color);
}

.alert-info {
    background-color: var(--bs-alert-info-bg);
    border-color: var(--bs-alert-info-border);
    color: var(--bs-alert-info-color);
}

.alert-warning {
    background-color: var(--bs-alert-warning-bg);
    border-color: var(--bs-alert-warning-border);
    color: var(--bs-alert-warning-color);
}

.alert-danger {
    background-color: var(--bs-alert-danger-bg);
    border-color: var(--bs-alert-danger-border);
    color: var(--bs-alert-danger-color);
}

/* 푸터 */
.footer {
    background-color: var(--bs-body-secondary-bg);
    color: var(--bs-body-secondary-color);
    padding: 48px 0 24px;
    margin-top: 60px;
    border-top: 1px solid var(--bs-border-color);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.footer h5 {
    color: var(--bs-primary);
    margin-bottom: 16px;
    font-weight: 600;
}

.footer a {
    color: var(--bs-body-tertiary-color);
    text-decoration: none;
    transition: color 0.15s ease-in-out;
}

.footer a:hover {
    color: var(--bs-primary);
}

/* 링크 스타일 */
a {
    color: var(--bs-link-color);
    text-decoration: none;
    transition: color 0.15s ease-in-out;
}

a:hover {
    color: var(--bs-link-hover-color);
}

/* 구분선 */
hr {
    border-color: var(--bs-border-color);
    height: 1px;
    background-color: var(--bs-border-color);
    border: none;
    margin: 24px 0;
    transition: background-color 0.3s ease;
}

/* 텍스트 색상 */
.text-muted {
    color: var(--bs-body-tertiary-color) !important;
}

.text-light {
    color: var(--bs-body-emphasis-color) !important;
}

/* 스크롤바 스타일링 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background-color: var(--bs-body-secondary-bg);
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

::-webkit-scrollbar-thumb {
    background-color: var(--bs-border-color);
    border-radius: 4px;
    border: 1px solid var(--bs-body-secondary-bg);
    transition: background-color 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
    background-color: var(--bs-body-tertiary-bg);
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .btn-custom {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
}

/* 세션 관련 스타일 */
.user-welcome {
    background-color: var(--bs-alert-success-bg);
    border: 1px solid var(--bs-alert-success-border);
    border-radius: 0.375rem;
    padding: 16px;
    margin-bottom: 24px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.user-welcome .alert {
    background-color: transparent;
    border: none;
    padding: 0;
    margin: 0;
}

.user-welcome .alert-success {
    background-color: transparent;
    border: none;
    color: var(--bs-alert-success-color);
}

/* 로그인 상태별 버튼 그룹 */
.auth-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.auth-buttons .btn {
    min-width: 120px;
}

/* 사용자 메뉴 드롭다운 */
.user-dropdown .dropdown-toggle::after {
    margin-left: 6px;
    border-top-color: var(--bs-primary);
}

.user-dropdown .dropdown-toggle:hover {
    color: var(--bs-primary) !important;
}

/* 프로필 링크 */
.profile-link {
    color: var(--bs-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.15s ease-in-out;
}

.profile-link:hover {
    color: var(--bs-link-hover-color);
    text-decoration: underline;
}

/* Bootstrap 5.3 다크모드 전용 효과 */
.bootstrap-dark-mode {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.text-bootstrap-dark {
    color: var(--bs-body-color);
}

.border-bootstrap-dark {
    border-color: var(--bs-border-color);
}

/* Bootstrap 5.3 다크모드 전용 애니메이션 */
@keyframes bootstrapDarkFade {
    0%, 100% { 
        opacity: 1;
    }
    50% { 
        opacity: 0.95;
    }
}

.bootstrap-dark-fade {
    animation: bootstrapDarkFade 3s ease-in-out infinite;
}