/**
 * MuseFlow Design System V2
 * Museum Workflow Platform - Brand Identity & UI Consistency
 * 
 * 박물관 전문성 + AI 혁신 = MuseFlow
 */

/* ============================================
   1. Brand Color Palette
   ============================================ */
:root {
    /* Primary Brand - MuseFlow Purple (AI + Innovation) */
    --museflow-primary: #8B5CF6;
    --museflow-primary-hover: #7C3AED;
    --museflow-primary-light: #EDE9FE;
    --museflow-primary-dark: #6D28D9;
    
    /* Secondary Brand - Museum Navy (Trust + Professionalism) */
    --museflow-secondary: #1E3A8A;
    --museflow-secondary-hover: #1E40AF;
    --museflow-secondary-light: #DBEAFE;
    
    /* Accent - Cultural Gold (Heritage + Premium) */
    --museflow-accent: #F59E0B;
    --museflow-accent-hover: #D97706;
    --museflow-accent-light: #FEF3C7;
    
    /* Neutral Grays */
    --museflow-bg-primary: #FFFFFF;
    --museflow-bg-secondary: #F9FAFB;
    --museflow-bg-tertiary: #F3F4F6;
    
    --museflow-border-light: #E5E7EB;
    --museflow-border-medium: #D1D5DB;
    --museflow-border-dark: #9CA3AF;
    
    --museflow-text-primary: #111827;
    --museflow-text-secondary: #4B5563;
    --museflow-text-tertiary: #6B7280;
    --museflow-text-muted: #9CA3AF;
    
    /* Status Colors */
    --status-success: #10B981;
    --status-success-bg: #D1FAE5;
    --status-warning: #F59E0B;
    --status-warning-bg: #FEF3C7;
    --status-error: #EF4444;
    --status-error-bg: #FEE2E2;
    --status-info: #3B82F6;
    --status-info-bg: #DBEAFE;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.12);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    /* Spacing */
    --space-xs: 0.25rem;  /* 4px */
    --space-sm: 0.5rem;   /* 8px */
    --space-md: 1rem;     /* 16px */
    --space-lg: 1.5rem;   /* 24px */
    --space-xl: 2rem;     /* 32px */
    --space-2xl: 3rem;    /* 48px */
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;    /* 12px */
    --font-size-sm: 0.875rem;   /* 14px */
    --font-size-base: 1rem;     /* 16px */
    --font-size-lg: 1.125rem;   /* 18px */
    --font-size-xl: 1.25rem;    /* 20px */
    --font-size-2xl: 1.5rem;    /* 24px */
    --font-size-3xl: 1.875rem;  /* 30px */
    
    /* Animation */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

/* ============================================
   2. MuseFlow Logo & Branding
   ============================================ */
.museflow-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.625rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--museflow-text-primary);
    text-decoration: none;
    transition: var(--transition-base);
}

.museflow-logo:hover {
    color: var(--museflow-primary);
}

.museflow-logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--museflow-primary) 0%, var(--museflow-primary-dark) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.125rem;
}

.museflow-logo-text {
    background: linear-gradient(135deg, var(--museflow-primary) 0%, var(--museflow-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================
   3. Button System
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: var(--museflow-primary);
    color: white;
}

.btn-primary:hover {
    background: var(--museflow-primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

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

.btn-outline {
    background: transparent;
    color: var(--museflow-primary);
    border: 1.5px solid var(--museflow-primary);
}

.btn-outline:hover {
    background: var(--museflow-primary-light);
}

/* ============================================
   4. Card System
   ============================================ */
.museflow-card {
    background: var(--museflow-bg-primary);
    border: 1px solid var(--museflow-border-light);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: var(--transition-base);
}

.museflow-card:hover {
    border-color: var(--museflow-primary-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.museflow-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
}

.museflow-card-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--museflow-text-primary);
}

/* ============================================
   5. Badge System
   ============================================ */
.museflow-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.75rem;
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
}

.badge-primary {
    background: var(--museflow-primary-light);
    color: var(--museflow-primary-dark);
}

.badge-success {
    background: var(--status-success-bg);
    color: #065F46;
}

.badge-warning {
    background: var(--status-warning-bg);
    color: #92400E;
}

.badge-info {
    background: var(--status-info-bg);
    color: #1E40AF;
}

/* ============================================
   6. AI Assistant Styling
   ============================================ */
.ai-assistant-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, var(--museflow-primary-light) 0%, var(--status-info-bg) 100%);
    border: 1px solid var(--museflow-primary);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--museflow-primary-dark);
}

.ai-assistant-badge i {
    animation: ai-pulse 2s infinite;
}

@keyframes ai-pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.1); }
}

/* ============================================
   7. Gradient System
   ============================================ */
.gradient-primary {
    background: linear-gradient(135deg, var(--museflow-primary) 0%, var(--museflow-primary-dark) 100%);
}

.gradient-secondary {
    background: linear-gradient(135deg, var(--museflow-secondary) 0%, var(--museflow-primary) 100%);
}

.gradient-accent {
    background: linear-gradient(135deg, var(--museflow-accent) 0%, #EA580C 100%);
}

.gradient-text {
    background: linear-gradient(135deg, var(--museflow-primary) 0%, var(--museflow-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================
   8. Icon System
   ============================================ */
.museflow-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.icon-primary {
    background: var(--museflow-primary-light);
    color: var(--museflow-primary);
}

.icon-secondary {
    background: var(--museflow-secondary-light);
    color: var(--museflow-secondary);
}

.icon-accent {
    background: var(--museflow-accent-light);
    color: var(--museflow-accent);
}

.icon-gradient {
    background: linear-gradient(135deg, var(--museflow-primary) 0%, var(--museflow-primary-dark) 100%);
    color: white;
}

/* ============================================
   9. Utility Classes
   ============================================ */
.text-primary { color: var(--museflow-text-primary); }
.text-secondary { color: var(--museflow-text-secondary); }
.text-muted { color: var(--museflow-text-muted); }

.bg-primary { background: var(--museflow-bg-primary); }
.bg-secondary { background: var(--museflow-bg-secondary); }

.border-light { border-color: var(--museflow-border-light); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

/* ============================================
   10. Mobile Responsive Design
   ============================================ */
@media (max-width: 768px) {
    :root {
        /* Mobile Typography */
        --font-size-xs: 0.6875rem;  /* 11px */
        --font-size-sm: 0.8125rem;  /* 13px */
        --font-size-base: 0.9375rem;/* 15px */
        --font-size-lg: 1rem;       /* 16px */
        --font-size-xl: 1.125rem;   /* 18px */
        --font-size-2xl: 1.25rem;   /* 20px */
        --font-size-3xl: 1.5rem;    /* 24px */
        
        /* Mobile Spacing */
        --space-xs: 0.25rem;   /* 4px */
        --space-sm: 0.375rem;  /* 6px */
        --space-md: 0.75rem;   /* 12px */
        --space-lg: 1rem;      /* 16px */
        --space-xl: 1.5rem;    /* 24px */
        --space-2xl: 2rem;     /* 32px */
    }
    
    /* Logo Mobile */
    .museflow-logo {
        font-size: 1rem;
        gap: 0.5rem;
    }
    
    .museflow-logo-icon {
        width: 28px;
        height: 28px;
        font-size: 1rem;
    }
    
    /* Buttons Mobile - Touch-friendly (44px minimum) */
    .btn {
        min-height: 44px;
        min-width: 44px;
        padding: 0.75rem 1.25rem;
        font-size: var(--font-size-sm);
        gap: 0.375rem;
    }
    
    /* Cards Mobile */
    .museflow-card {
        padding: 1rem;
        border-radius: var(--radius-md);
    }
    
    .museflow-card-title {
        font-size: var(--font-size-base);
    }
    
    /* Badge Mobile */
    .museflow-badge {
        padding: 0.25rem 0.625rem;
        font-size: var(--font-size-xs);
    }
    
    /* Icon Mobile */
    .museflow-icon {
        width: 36px;
        height: 36px;
        font-size: 1.125rem;
    }
    
    /* AI Assistant Badge Mobile */
    .ai-assistant-badge {
        padding: 0.5rem 0.875rem;
        font-size: var(--font-size-xs);
        gap: 0.375rem;
    }
    
    /* Touch-friendly animations - faster on mobile */
    * {
        --transition-fast: 100ms ease;
        --transition-base: 150ms ease;
        --transition-slow: 200ms ease;
    }
    
    /* Reduce animations on mobile for performance */
    @media (prefers-reduced-motion: reduce) {
        * {
            animation-duration: 0.01ms !important;
            transition-duration: 0.01ms !important;
        }
    }
}

/* Tablet Landscape */
@media (min-width: 769px) and (max-width: 1024px) {
    :root {
        --font-size-2xl: 1.375rem;
        --font-size-3xl: 1.75rem;
    }
}

/* Touch Devices - Larger tap targets */
@media (hover: none) and (pointer: coarse) {
    .btn {
        min-height: 48px;
        min-width: 48px;
    }
    
    .museflow-icon {
        width: 40px;
        height: 40px;
    }
    
    /* Remove hover effects on touch devices */
    .museflow-card:hover {
        transform: none;
    }
    
    .btn:hover {
        transform: none;
    }
}