/**
 * Class-SNA v2.0 글라스모피즘 디자인 시스템
 * Tailwind CSS와 함께 사용
 */

/* ===== 루트 CSS 변수 ===== */
:root {
    /* 그라데이션 배경 색상 */
    --gradient-start: #667eea;
    --gradient-end: #764ba2;
    --gradient-accent: #f093fb;

    /* 글라스모피즘 효과 */
    --glass-bg: rgba(255, 255, 255, 0.15);
    --glass-bg-light: rgba(255, 255, 255, 0.25);
    --glass-bg-dark: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px rgba(31, 38, 135, 0.37);
    --glass-blur: blur(16px);

    /* 색상 팔레트 */
    --primary: #667eea;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --secondary: #764ba2;
    --accent: #f093fb;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;

    /* 텍스트 색상 */
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-light: rgba(255, 255, 255, 0.9);
    --text-muted: rgba(255, 255, 255, 0.7);

    /* 간격 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* 둥근 모서리 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-2xl: 2rem;
    --radius-full: 9999px;

    /* 전환 효과 */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
}

/* ===== 기본 스타일 리셋 ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Noto Sans KR', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
}

/* ===== 그라데이션 배경 ===== */
.gradient-bg {
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 50%, var(--gradient-accent) 100%);
    background-size: 400% 400%;
    animation: gradient-shift 15s ease infinite;
}

.gradient-bg-static {
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
}

@keyframes gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* ===== 글라스모피즘 카드 ===== */
.glass {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--glass-shadow);
}

.glass-light {
    background: var(--glass-bg-light);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--glass-shadow);
}

.glass-dark {
    background: var(--glass-bg-dark);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    box-shadow: var(--glass-shadow);
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--glass-shadow);
    padding: var(--spacing-lg);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.glass-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(31, 38, 135, 0.45);
}

/* ===== 글라스 버튼 ===== */
.glass-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--glass-bg-light);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    color: var(--text-light);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.glass-btn:hover {
    background: var(--glass-bg);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(31, 38, 135, 0.3);
}

.glass-btn:active {
    transform: translateY(0);
}

.glass-btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: none;
    border-radius: var(--radius-full);
    color: var(--text-light);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.glass-btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(31, 38, 135, 0.3);
}

.glass-btn-primary:active {
    transform: translateY(0);
}

.glass-btn-outline {
    background: transparent;
    border: 2px solid var(--glass-border);
}

.glass-btn-outline:hover {
    background: var(--glass-bg);
}

/* ===== 글라스 입력 필드 ===== */
.glass-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    color: var(--text-light);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.glass-input::placeholder {
    color: var(--text-muted);
}

.glass-input:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.3);
}

/* ===== 네비게이션 ===== */
.glass-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    padding: var(--spacing-md) var(--spacing-xl);
}

.nav-link {
    color: var(--text-light);
    text-decoration: none;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
    background: var(--glass-bg-light);
}

/* ===== 사이드바 ===== */
.glass-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: 280px;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-right: 1px solid var(--glass-border);
    padding: var(--spacing-lg);
    overflow-y: auto;
    z-index: 100;
}

/* ===== 통계 카드 ===== */
.stat-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    text-align: center;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-light);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

.stat-icon {
    width: 48px;
    height: 48px;
    background: var(--glass-bg-light);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: 1.5rem;
}

/* ===== 차트 컨테이너 ===== */
.chart-container {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    min-height: 400px;
}

/* ===== 네트워크 시각화 컨테이너 ===== */
.network-container {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    min-height: 600px;
}

.network-container iframe {
    width: 100%;
    height: 100%;
    border: none;
    min-height: 600px;
}

/* ===== 테이블 ===== */
.glass-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.glass-table thead {
    background: var(--glass-bg);
}

.glass-table th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    color: var(--text-light);
    border-bottom: 1px solid var(--glass-border);
}

.glass-table td {
    padding: var(--spacing-md);
    color: var(--text-light);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.glass-table tbody tr:hover {
    background: var(--glass-bg);
}

/* ===== 뱃지 ===== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-primary {
    background: rgba(102, 126, 234, 0.3);
    color: var(--primary-light);
}

.badge-success {
    background: rgba(16, 185, 129, 0.3);
    color: var(--success);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.3);
    color: var(--warning);
}

.badge-error {
    background: rgba(239, 68, 68, 0.3);
    color: var(--error);
}

/* ===== 알림 ===== */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.alert-info {
    background: rgba(59, 130, 246, 0.2);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: var(--info);
}

.alert-success {
    background: rgba(16, 185, 129, 0.2);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--success);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.2);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: var(--warning);
}

.alert-error {
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--error);
}

/* ===== 로딩 스피너 ===== */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--glass-border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

/* ===== 유틸리티 클래스 ===== */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shadow-glass {
    box-shadow: var(--glass-shadow);
}

.backdrop-blur {
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}

/* ===== 애니메이션 ===== */
.fade-in {
    animation: fadeIn var(--transition-normal) ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.slide-in-left {
    animation: slideInLeft var(--transition-normal) ease-out;
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

.scale-in {
    animation: scaleIn var(--transition-fast) ease-out;
}

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

/* ===== 반응형 ===== */
@media (max-width: 1024px) {
    .glass-sidebar {
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
    }

    .glass-sidebar.open {
        transform: translateX(0);
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 1rem;
        --spacing-xl: 1.5rem;
    }

    .stat-value {
        font-size: 2rem;
    }

    .network-container {
        min-height: 400px;
    }
}

/* ===== 다크 모드 지원 (선택적) ===== */
@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #f9fafb;
        --text-secondary: #d1d5db;
    }
}

/* ===== 프린트 스타일 ===== */
@media print {
    .glass-nav, .glass-sidebar, .glass-btn {
        display: none !important;
    }

    .glass, .glass-card {
        background: white !important;
        backdrop-filter: none !important;
        box-shadow: none !important;
        border: 1px solid #e5e7eb !important;
    }
}