/* ============================================
   링크네비 (LinkNavi) - 메인 스타일시트
   작성일: 2025-08-19
   테마: 검은색 배경 + 금색 포인트
   ============================================ */

/* ============================================
   1. CSS 변수 정의
   ============================================ */
:root {
    /* 색상 변수 */
    --primary-gold: #ffd700;
    --primary-black: #000000;
    --secondary-gold: #ffed4e;
    --dark-gold: #b8860b;
    --light-gold: #fff8dc;
    
    /* 그라데이션 */
    --gradient-gold: linear-gradient(135deg, #ffd700, #ffed4e);
    --gradient-dark: linear-gradient(135deg, #000000, #1a1a1a);
    --gradient-subtle: linear-gradient(135deg, #0a0a0a, #151515);
    
    /* 회색 스케일 (어두운 배경용으로 밝게 조정) */
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #8c959d;  /* 밝게 조정 */
    --gray-700: #6c757d;  /* 밝게 조정 */
    --gray-800: #495057;  /* 밝게 조정 */
    --gray-900: #343a40;  /* 밝게 조정 */
    
    /* 간격 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* 폰트 */
    --font-primary: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-xxl: 1.5rem;
    --font-size-xxxl: 2rem;
    
    /* 애니메이션 */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 그림자 */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-gold: 0 4px 15px rgba(255, 215, 0, 0.3);
    
    /* 테두리 */
    --border-radius-sm: 0.25rem;
    --border-radius-base: 0.5rem;
    --border-radius-lg: 1rem;
    --border-radius-full: 9999px;
    
    /* Z-인덱스 */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ============================================
   2. 전역 스타일
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    background: var(--primary-black);
    color: var(--primary-gold);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============================================
   3. 커스텀 스크롤바
   ============================================ */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #1a1a1a;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-gold);
    border-radius: var(--border-radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--dark-gold);
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--primary-gold) #1a1a1a;
}

/* ============================================
   4. Bootstrap 오버라이드
   ============================================ */
/* 텍스트 색상 오버라이드 - 가독성 개선 */
.text-muted {
    color: #999 !important;  /* 기본 #6c757d보다 밝게 */
}

.text-secondary {
    color: #aaa !important;
}

small, .small {
    color: #999;
}

/* 링크 색상 개선 */
a {
    color: var(--primary-gold);
}

a:hover {
    color: var(--secondary-gold);
}

/* 배지 가독성 개선 */
.badge.bg-dark {
    background: #333 !important;
    color: var(--primary-gold) !important;
}
.navbar-dark {
    background: var(--gradient-dark) !important;
    border-bottom: 1px solid var(--primary-gold);
    position: relative;
    z-index: var(--z-fixed);
    transition: transform var(--transition-base);
}

.navbar {
    overflow: visible !important;
    padding: var(--spacing-sm) 0;
}

.navbar-collapse {
    overflow: visible !important;
}

.navbar-brand {
    color: var(--primary-gold) !important;
    font-weight: 700;
    font-size: var(--font-size-xxl);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-link {
    color: var(--primary-gold) !important;
    transition: all var(--transition-base);
    padding: var(--spacing-sm) var(--spacing-md) !important;
    border-radius: var(--border-radius-base);
}

.nav-link:hover {
    color: var(--secondary-gold) !important;
    transform: translateY(-2px);
    background: rgba(255, 215, 0, 0.1);
}

.nav-link.active {
    background: rgba(255, 215, 0, 0.2);
    color: var(--secondary-gold) !important;
}

/* ============================================
   5. 드롭다운 메뉴
   ============================================ */
.dropdown {
    position: static !important;
}

.nav-item.dropdown {
    position: relative !important;
}

.dropdown-menu {
    background-color: #1a1a1a !important;
    border: 1px solid var(--primary-gold) !important;
    margin-top: var(--spacing-sm) !important;
    z-index: var(--z-dropdown) !important;
    position: absolute !important;
    top: 100% !important;
    border-radius: var(--border-radius-base);
    box-shadow: var(--shadow-gold);
}

.dropdown-item {
    color: var(--primary-gold) !important;
    transition: all var(--transition-base);
    padding: var(--spacing-sm) var(--spacing-md);
}

.dropdown-item:hover,
.dropdown-item:focus {
    background-color: rgba(255, 215, 0, 0.1) !important;
    color: var(--secondary-gold) !important;
}

.dropdown-divider {
    border-color: #444 !important;
}

.dropdown-toggle::after {
    color: var(--primary-gold);
}

/* ============================================
   6. 버튼 스타일
   ============================================ */
.btn {
    border-radius: var(--border-radius-base);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: 500;
    transition: all var(--transition-base);
}

.btn-primary {
    background: var(--gradient-gold);
    border: none;
    color: var(--primary-black);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-gold);
    color: var(--primary-black);
    background: linear-gradient(135deg, #ffed4e, #ffd700);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--primary-gold);
    color: var(--primary-gold);
}

.btn-secondary:hover {
    background: var(--primary-gold);
    color: var(--primary-black);
}

/* ============================================
   7. 카드 컴포넌트
   ============================================ */
.card {
    background: var(--gradient-dark);
    border: 1px solid var(--primary-gold);
    color: var(--primary-gold);
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-base);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-gold);
}

.card-header {
    background: var(--gradient-gold);
    color: var(--primary-black);
    font-weight: 600;
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
}

.card-body {
    padding: var(--spacing-lg);
}

/* ============================================
   8. 푸터
   ============================================ */
.footer {
    background: var(--gradient-dark);
    border-top: 1px solid var(--primary-gold);
    color: var(--primary-gold);
    padding: var(--spacing-xl) 0;
    margin-top: auto;
}

.footer a {
    color: var(--primary-gold);
    text-decoration: none;
    transition: color var(--transition-base);
}

.footer a:hover {
    color: var(--secondary-gold);
}

/* ============================================
   9. 유틸리티 클래스
   ============================================ */
.gradient-title {
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.rotating-icon {
    display: inline-block;
    animation: rotate 2s linear infinite;
}

.fade-in {
    animation: fadeInUp 0.6s ease forwards;
}

.text-gold {
    color: var(--primary-gold) !important;
}

.text-secondary-gold {
    color: var(--secondary-gold) !important;
}

.bg-dark-gradient {
    background: var(--gradient-dark) !important;
}

/* ============================================
   10. 애니메이션
   ============================================ */
@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes headerScan {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100vw); }
}

@keyframes shimmer {
    0% { background-position: -1000px 0; }
    100% { background-position: 1000px 0; }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* ============================================
   11. 헤더 스캔 효과
   ============================================ */
.header-scan {
    position: relative;
    overflow: visible !important;
}

.header-scan::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 2px;
    height: 100%;
    background: var(--primary-gold);
    animation: headerScan 3s ease-in-out infinite;
    box-shadow: 0 0 20px var(--primary-gold);
    z-index: 1;
}

/* ============================================
   12. 반응형 디자인
   ============================================ */
@media (max-width: 1200px) {
    :root {
        --font-size-base: 0.95rem;
    }
}

@media (max-width: 992px) {
    :root {
        --font-size-base: 0.9rem;
    }
    
    .navbar-brand {
        font-size: var(--font-size-xl);
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-base: 0.875rem;
        --spacing-md: 0.75rem;
        --spacing-lg: 1.25rem;
        --spacing-xl: 1.75rem;
    }
}

@media (max-width: 576px) {
    :root {
        --font-size-base: 0.875rem;
        --spacing-sm: 0.375rem;
        --spacing-md: 0.625rem;
        --spacing-lg: 1rem;
        --spacing-xl: 1.5rem;
    }
    
    .navbar-brand {
        font-size: var(--font-size-lg);
    }
}

/* ============================================
   13. 접근성 개선
   ============================================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-gold);
    color: var(--primary-black);
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    z-index: var(--z-tooltip);
}

.skip-link:focus {
    top: 0;
}

/* 포커스 스타일 개선 */
a:focus,
button:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--primary-gold);
    outline-offset: 2px;
}

/* 고대비 모드 지원 */
@media (prefers-contrast: high) {
    :root {
        --primary-gold: #ffed4e;
        --primary-black: #000000;
    }
}

/* 다크 모드 지원 (이미 다크 테마이지만 시스템 설정 존중) */
@media (prefers-color-scheme: dark) {
    /* 현재 테마가 이미 다크 모드 */
}

/* 애니메이션 감소 모드 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ============================================
   14. 커스텀 버튼 스타일
   ============================================ */
.btn-gold {
    background: linear-gradient(135deg, #ffd700, #ffed4e);
    color: #000;
    border: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-gold:hover {
    background: linear-gradient(135deg, #ffed4e, #ffd700);
    color: #000;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 215, 0, 0.4);
}

.btn-outline-gold {
    background: transparent;
    color: #ffd700;
    border: 1px solid #ffd700;
    transition: all 0.3s ease;
}

.btn-outline-gold:hover {
    background: #ffd700;
    color: #000;
    border-color: #ffd700;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 215, 0, 0.3);
}

/* 네비게이션 바 조정 */
.navbar-nav.mx-auto {
    margin-left: auto !important;
    margin-right: auto !important;
}

.dropdown-menu-end {
    right: 0;
    left: auto;
}

/* ============================================
   15. 헤더 배너 스타일
   ============================================ */
.header-banner {
    background: linear-gradient(135deg, rgba(0,0,0,0.9) 0%, rgba(26,26,26,0.9) 100%);
    border-bottom: 2px solid var(--primary-gold);
    position: relative;
}

.header-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-gold), transparent);
    animation: slide 3s linear infinite;
}

@keyframes slide {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.stats-inline {
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 215, 0, 0.2);
    max-width: fit-content;
    margin: 0 auto;
}

.stat-item {
    padding: 0 0.75rem;
    border-right: 1px solid rgba(255, 215, 0, 0.1);
    display: inline-flex;
    align-items: center;
    white-space: nowrap;
}

.stat-item:last-child {
    border-right: none;
}

@media (max-width: 576px) {
    .stat-item {
        padding: 0 0.5rem;
        font-size: 0.9rem;
    }
    
    .stat-item .small {
        font-size: 0.75rem;
    }
}

.pulse {
    animation: pulse 2s infinite;
}

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

/* Offcanvas 메뉴 스타일 */
.offcanvas-start {
    width: 280px !important;
    background: linear-gradient(135deg, #1a1a1a 0%, #0d0d0d 100%) !important;
}

.offcanvas-header {
    background: rgba(255, 215, 0, 0.05);
}

.offcanvas-body .nav-link {
    color: #e0e0e0;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

.offcanvas-body .nav-link:hover {
    background: rgba(255, 215, 0, 0.1);
    color: #ffd700;
    transform: translateX(5px);
}

.offcanvas-body .nav-link.active {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.2), rgba(255, 215, 0, 0.1));
    color: #ffd700;
    border-left: 3px solid #ffd700;
}

.offcanvas-body .collapse {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 0.5rem;
    margin-top: 0.5rem;
}

.offcanvas-body .collapse .nav-link {
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
}

/* 햄버거 메뉴 버튼 스타일 */
.navbar-toggler {
    border: 2px solid #ffd700 !important;
    background-color: rgba(255, 215, 0, 0.15) !important;
    transition: all 0.3s ease;
    padding: 0.5rem !important;
}

.navbar-toggler:hover {
    background-color: rgba(255, 215, 0, 0.3) !important;
    border-color: #ffed4e !important;
    transform: scale(1.05);
}

.navbar-toggler:focus {
    box-shadow: 0 0 0 0.25rem rgba(255, 215, 0, 0.35) !important;
}

.navbar-toggler:active {
    background-color: rgba(255, 215, 0, 0.4) !important;
}

/* 햄버거 메뉴 아이콘을 금색으로 */
.navbar-toggler-icon {
    background-image: none !important;
    width: 24px;
    height: 24px;
    position: relative;
}

.navbar-toggler-icon::before,
.navbar-toggler-icon::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 3px;
    background-color: #ffd700;
    left: 0;
    transition: all 0.3s ease;
}

.navbar-toggler-icon::before {
    top: 6px;
    box-shadow: 0 6px 0 #ffd700;
}

.navbar-toggler-icon::after {
    bottom: 6px;
}

/* 사용자 메뉴 버튼 스타일 */
.btn-link.text-gold {
    transition: all 0.3s ease;
}

.btn-link.text-gold:hover {
    transform: scale(1.1);
}