/* KOSPER 테마 시스템 v2.2.0 */
/* 완전한 CSS 변수 기반 테마 시스템 */

/* ========================================
   라이트 테마 (기본)
   ======================================== */
:root {
    /* === 배경색 === */
    --color-background: #ffffff !important;
    --color-surface: #f8fafc !important;
    --color-surface-secondary: #f1f5f9 !important;
    --color-card: #ffffff !important;

    /* === 텍스트 색상 === */
    --color-text: #1e293b !important;
    --color-text-secondary: #64748b !important;
    --color-textSecondary: #64748b !important; /* 호환성 */
    --color-text-muted: #94a3b8 !important;
    --color-text-inverse: #ffffff !important;

    /* === 테마 색상 === */
    --color-primary: #2563eb !important;
    --color-primary-hover: #1d4ed8 !important;
    --color-primary-opacity: rgba(37, 99, 235, 0.1) !important;
    --color-secondary: #10b981 !important;
    --color-accent: #f5576c !important;
    --color-accent-hover: #e11d48 !important;

    /* === 상태 색상 === */
    --color-success: #22c55e !important;
    --color-error: #ef4444 !important;
    --color-warning: #f59e0b !important;
    --color-info: #3b82f6 !important;

    /* === 테두리 및 그림자 === */
    --color-border: #e2e8f0 !important;
    --color-border-light: #f1f5f9 !important;
    --color-shadow: rgba(0, 0, 0, 0.1) !important;
    --color-shadow-light: rgba(0, 0, 0, 0.05) !important;
    --color-primary-shadow: rgba(37, 99, 235, 0.3) !important;
    --color-primary-shadow-hover: rgba(37, 99, 235, 0.4) !important;

    /* === 오버레이 === */
    --color-overlay: rgba(0, 0, 0, 0.5) !important;

    /* 그라데이션 → 단색으로 변경 */
    --gradient-primary: var(--color-primary) !important;
    --gradient-secondary: var(--color-secondary) !important;
    --gradient-accent: var(--color-accent) !important;
    
    /* 추가 그라데이션 변수들도 단색으로 */
    --color-gradient-purple: var(--color-secondary) !important;
    --color-gradient-blue: var(--color-info) !important;
    --color-telegram-start: var(--color-info) !important;
    --color-telegram-end: var(--color-info) !important;
    --color-icon-gradient-start: var(--color-primary) !important;
    --color-icon-gradient-end: var(--color-primary) !important;

    /* 블로그/뉴스 전용 변수 */
    --color-text-inverse: #ffffff;
    --color-text-light: #cbd5e1 !important;
    --color-surface-overlay: rgba(255, 255, 255, 0.1) !important;
    --color-surface-accent: #e0e7ff !important;
    --color-border-overlay: rgba(255, 255, 255, 0.3) !important;
    --color-surface-dark: #0f172a !important;
    --color-indigo: #6366f1 !important;
    
    /* 상태 색상 라이트 버전 */
    --color-success-light: #dcfce7 !important;
    --color-warning-light: #fef3c7 !important;
    --color-error-light: #fee2e2 !important;
    --color-info-light: #dbeafe !important;
    
    /* 추가 유틸리티 변수 */
    --color-background-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    --color-surface-light: #f8fafc !important;

    /* 전환 시간 */
    --transition-fast: 0.2s ease !important;
    --transition-normal: 0.3s ease !important;
    --transition-slow: 0.5s ease !important;
}

/* ========================================
   다크 테마
   ======================================== */
body.theme-dark {
    /* === 배경색 === */
    --color-background: #0f172a !important;
    --color-surface: #1e293b !important;
    --color-surface-secondary: #334155 !important;
    --color-card: #1e293b !important;

    /* === 텍스트 색상 === */
    --color-text: #f1f5f9 !important;
    --color-text-secondary: #94a3b8 !important;
    --color-textSecondary: #94a3b8 !important;
    --color-text-muted: #64748b !important;
    --color-text-inverse: #f1f5f9 !important;

    /* === 테마 색상 === */
    --color-primary: #3b82f6 !important;
    --color-primary-hover: #2563eb !important;
    --color-primary-opacity: rgba(59, 130, 246, 0.1) !important;
    --color-secondary: #10b981 !important;
    --color-accent: #f87171 !important;
    --color-accent-hover: #ef4444 !important;

    /* === 상태 색상 === */
    --color-success: #22c55e !important;
    --color-error: #ef4444 !important;
    --color-warning: #f59e0b !important;
    --color-info: #60a5fa !important;

    /* === 테두리 및 그림자 === */
    --color-border: #334155 !important;
    --color-border-light: #475569 !important;
    --color-shadow: rgba(0, 0, 0, 0.3) !important;
    --color-shadow-light: rgba(0, 0, 0, 0.2) !important;
    --color-primary-shadow: rgba(59, 130, 246, 0.3) !important;
    --color-primary-shadow-hover: rgba(59, 130, 246, 0.4) !important;

    /* === 오버레이 === */
    --color-overlay: rgba(0, 0, 0, 0.7) !important;

    /* 그라데이션 → 단색으로 변경 */
    --gradient-primary: var(--color-primary) !important;
    --gradient-secondary: var(--color-secondary) !important;
    --gradient-accent: var(--color-accent) !important;
    
    /* 추가 그라데이션 변수들도 단색으로 */
    --color-gradient-purple: var(--color-secondary) !important;
    --color-gradient-blue: var(--color-info) !important;
    --color-telegram-start: var(--color-info) !important;
    --color-telegram-end: var(--color-info) !important;
    --color-icon-gradient-start: var(--color-primary) !important;
    --color-icon-gradient-end: var(--color-primary) !important;

    /* 블로그/뉴스 다크테마 전용 변수 */
    --color-text-inverse: #f1f5f9;
    --color-text-light: #cbd5e1;
    --color-surface-overlay: rgba(255, 255, 255, 0.05);
    --color-surface-accent: #1e293b;
    --color-border-overlay: rgba(255, 255, 255, 0.1);
    --color-surface-dark: #0f172a;
    --color-indigo: #6366f1;
    
    /* 상태 색상 라이트 버전 - 다크테마 */
    --color-success-light: #064e3b;
    --color-warning-light: #451a03;
    --color-error-light: #7f1d1d;
    --color-info-light: #1e3a8a;
    
    /* 추가 유틸리티 변수 - 다크테마 */
    --color-background-gradient: linear-gradient(135deg, #1e293b 0%, #0f172a 100%) !important;
    --color-surface-light: #334155 !important;
}

/* 부드러운 테마 전환 애니메이션 */
* {
    transition: background-color 0.15s ease,
                color 0.15s ease,
                border-color 0.15s ease,
                box-shadow 0.15s ease !important;
}

/* 테마 전환 시 부드러운 효과 */
.theme-transition {
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

/* 즉시 적용이 필요한 요소들 */
body, html, .navbar, .hero, .footer {
    transition: background-color 0.1s ease, color 0.1s ease !important;
}

/* 테마 설정 버튼 */
.theme-settings-btn {
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    color: var(--color-text);
    padding: 12px 16px;
    border-radius: 50px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: 8px;
    position: relative;
    overflow: hidden;
}

.theme-settings-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: -1;
}

.theme-settings-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--color-shadow);
    border-color: var(--color-primary);
}

.theme-settings-btn:hover::before {
    opacity: 1;
}

.theme-settings-btn i {
    transition: transform var(--transition-normal);
}

.theme-settings-btn:hover i {
    transform: rotate(15deg);
}

/* 네비게이션 바 내 테마 버튼들 */
.navbar .theme-settings-btn {
    margin-left: 12px;
}

/* 모바일 반응형 */
@media (max-width: 768px) {
    .navbar .theme-settings-btn {
        padding: 10px 14px;
        font-size: 14px;
        margin-left: 8px;
    }
}

/* 테마 전환 시 페이지 전체 애니메이션 */
.theme-transition-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-background);
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-slow);
}

.theme-transition-overlay.active {
    opacity: 1;
}

/* 로딩 애니메이션 */
.theme-loading {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10000;
    display: none;
}

.theme-loading.active {
    display: block;
}

.theme-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--color-border);
    border-top: 4px solid var(--color-primary);
    border-radius: 50%;
    animation: theme-spin 1s linear infinite;
}

@keyframes theme-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 테마 미리보기 */
.theme-preview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.theme-preview-item {
    padding: 20px;
    border-radius: 12px;
    border: 2px solid var(--color-border);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.theme-preview-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--color-shadow);
    border-color: var(--color-primary);
}

.theme-preview-item.selected {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.theme-preview-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

/* 반응형 테마 설정 */
@media (max-width: 768px) {
    .theme-preview {
        grid-template-columns: 1fr;
    }
}

/* 프린트 스타일 */
@media print {
    body {
        --color-background: white;
        --color-text: black;
        --color-border: var(--color-border-light, #ccc);
    }
}

/* 선호도 미디어 쿼리 */
@media (prefers-color-scheme: dark) {
    :root:not(.theme-forced) {
        /* 시스템이 다크모드를 선호할 때의 기본 설정 */
        --color-background: #0f172a;
        --color-surface: #1e293b;
        --color-text: #f1f5f9;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        animation: none !important;
    }
}

/* 테마 설정 모달 */
.theme-settings-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: none;
}

.theme-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.theme-modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--color-surface);
    border-radius: 16px;
    box-shadow: 0 20px 60px var(--color-shadow);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    border: 1px solid var(--color-border);
}

.theme-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    border-bottom: 1px solid var(--color-border);
}

.theme-modal-header h3 {
    margin: 0;
    color: var(--color-text);
    font-size: 1.5rem;
    font-weight: 600;
}

.theme-modal-close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.theme-modal-close:hover {
    background: var(--color-surface-secondary);
    color: var(--color-text);
}

.theme-modal-body {
    padding: 24px;
}

.theme-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 12px;
    margin-bottom: 24px;
}

.theme-option-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px;
    background: var(--color-background);
    border: 2px solid var(--color-border);
    border-radius: 12px;
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: 14px;
    font-weight: 500;
}

.theme-option-btn:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--color-shadow);
}

.theme-option-btn i {
    font-size: 20px;
    margin-bottom: 4px;
}

.theme-preview-section h4 {
    margin: 0 0 16px 0;
    color: var(--color-text);
    font-size: 1.1rem;
    font-weight: 600;
}

.preview-colors {
    display: flex;
    gap: 8px;
    margin-top: 12px;
}

.color-sample {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    border: 1px solid var(--color-border);
}

/* 모바일 반응형 */
@media (max-width: 768px) {
    .theme-modal-content {
        width: 95%;
        margin: 20px;
        transform: none;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
    }

    .theme-options {
        grid-template-columns: 1fr;
    }

    .theme-option-btn {
        flex-direction: row;
        justify-content: center;
        text-align: center;
    }
}