/* ========================================
   Common Styles - MyGoldPrice Design System
   다크 모드 + 글래스모피즘 통일 디자인
   ======================================== */

:root {
    /* Dark Mode Colors - Deeper Black */
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-glass: rgba(17, 17, 17, 0.7);
    --bg-glass-hover: rgba(17, 17, 17, 0.9);

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #d4d4d8;  /* 개선: 더 밝은 회색 (WCAG AA 통과) */
    --text-muted: #a1a1aa;

    /* Brand Colors - Unified Gold System */
    --primary: #FFD700;
    --primary-dark: #DAA520;
    --primary-light: #FFED4E;
    --primary-gradient: linear-gradient(135deg, #FFD700 0%, #FF8C00 50%, #FFA500 100%);

    /* Blog Key Colors - 가독성 최적화 */
    --blog-text-body: #d4d4d8;        /* 본문 텍스트 (밝은 회색) */
    --blog-text-emphasis: #FFC107;    /* 강조 텍스트 Bold (부드러운 금색) */
    --blog-text-highlight: #FFD700;   /* 중요 강조 (금색) */
    --blog-link: #60A5FA;             /* 링크 (파란색) */
    --blog-link-hover: #93C5FD;       /* 링크 호버 (밝은 파란색) */

    /* Secondary - Same as Primary for consistency */
    --secondary: #FFD700;
    --secondary-dark: #DAA520;
    --secondary-gradient: linear-gradient(135deg, #FFD700 0%, #FF8C00 50%, #FFA500 100%);

    /* Accent - Same as Primary for consistency */
    --accent: #FFD700;
    --accent-dark: #DAA520;
    --accent-gradient: linear-gradient(135deg, #FFD700 0%, #FF8C00 50%, #FFA500 100%);

    /* Gold - For Logo (Enhanced gradient) */
    --gold-gradient: linear-gradient(135deg, #FFD700 0%, #FF8C00 50%, #FFA500 100%);

    /* Text on Gold Background - High Contrast */
    --text-on-gold: #1a1a1a;
    --text-on-gold-light: rgba(0, 0, 0, 0.85);

    /* Border & Shadow */
    --border-color: rgba(255, 255, 255, 0.1);
    --border-color-hover: rgba(255, 255, 255, 0.2);
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);

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

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 15px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
}

/* ========================================
   Global Reset
   ======================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    background: var(--bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(255, 215, 0, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(255, 140, 0, 0.08) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* ========================================
   Common Header (통일된 헤더)
   ======================================== */

.common-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-sm) 0;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
    transition: transform var(--transition-fast);
}

.header-logo:hover {
    transform: translateY(-2px);
}

.logo-icon {
    font-size: 2rem;
}

.logo-text h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    background: var(--gold-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-text .logo-subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-top: 2px;
}

.header-nav {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    position: relative;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-glass);
}

.nav-link.active {
    color: var(--primary);
    background: var(--bg-glass);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background: var(--primary);
    border-radius: 50%;
}


/* ========================================
   Glass Card (재사용 가능한 카드)
   ======================================== */

.glass-card {
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

.glass-card:hover {
    background: var(--bg-glass-hover);
    border-color: var(--border-color-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.glass-card-header {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.glass-card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.glass-card-subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-xl);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 4px 12px rgba(255, 215, 0, 0.3);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 215, 0, 0.4);
    filter: brightness(1.05);
}

.btn-secondary {
    background: var(--bg-glass);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-glass-hover);
    border-color: var(--border-color-hover);
}

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

.btn-ghost:hover {
    color: var(--text-primary);
    background: var(--bg-glass);
}

/* ========================================
   Badge
   ======================================== */

.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}

.badge-primary {
    background: rgba(255, 215, 0, 0.15);
    color: var(--primary-light);
    border: 1px solid rgba(255, 215, 0, 0.4);
    text-shadow: 0 0 8px rgba(255, 215, 0, 0.5);
}

.badge-secondary {
    background: rgba(255, 215, 0, 0.15);
    color: var(--primary-light);
    border: 1px solid rgba(255, 215, 0, 0.4);
    text-shadow: 0 0 8px rgba(255, 215, 0, 0.5);
}

.badge-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

/* ========================================
   Animations
   ======================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        transform: translateX(-100%);
    }
    to {
        transform: translateX(0);
    }
}

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

.fade-in {
    animation: fadeIn var(--transition-base) ease-out;
}

.slide-in {
    animation: slideIn var(--transition-base) ease-out;
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 768px) {
    .header-nav {
        display: flex;
        gap: 0.5rem;
    }

    .nav-link {
        font-size: 0.75rem;
        padding: 6px 8px;
    }

    .logo-text h1 {
        font-size: 1.1rem;
    }

    .logo-text .logo-subtitle {
        display: none;
    }
}

@media (max-width: 480px) {
    .header-nav {
        gap: 0.25rem;
    }

    .nav-link {
        font-size: 0.7rem;
        padding: 5px 6px;
    }

    .logo-text h1 {
        font-size: 1rem;
    }
}

/* ========================================
   Utility Classes
   ======================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    padding-top: 2rem;
}

.text-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

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

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

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

.text-on-gold-bg {
    color: var(--text-on-gold);
}

.text-on-gold-bg-light {
    color: var(--text-on-gold-light);
}

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

/* ========================================
   Blog Preview Section
   ======================================== */

.blog-preview-section {
    margin: 40px 0;
    padding: 30px;
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.blog-preview-header {
    text-align: center;
    margin-bottom: 30px;
}

.blog-preview-title {
    font-size: 2rem;
    margin-bottom: 10px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.blog-preview-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.blog-preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.blog-preview-card {
    text-decoration: none;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: all var(--transition-base);
    overflow: hidden;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.blog-preview-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 10px 40px rgba(255, 215, 0, 0.25);
}

.blog-preview-card.coming-soon {
    background: rgba(17, 17, 17, 0.5);
    opacity: 0.6;
    position: relative;
}

.blog-preview-badge {
    display: inline-block;
    background: var(--primary-gradient);
    color: white;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.blog-preview-badge.secondary {
    background: var(--secondary-gradient);
}

.blog-preview-badge.accent {
    background: var(--accent-gradient);
}

.blog-preview-card h3 {
    color: var(--text-primary);
    margin-bottom: 10px;
    font-size: 1.2rem;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.blog-preview-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.blog-preview-coming-soon {
    position: absolute;
    top: 15px;
    right: 15px;
    background: linear-gradient(135deg, #f43f5e 0%, #e11d48 100%);
    color: white;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.blog-preview-cta {
    text-align: center;
}

.blog-preview-btn {
    display: inline-block;
    background: var(--primary-gradient);
    color: white;
    padding: 12px 32px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-base);
    box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.blog-preview-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255, 215, 0, 0.45);
    filter: brightness(1.05);
}