/* ============================================
   SHARED STYLES - ALL TOOLS
   deepv lab - deepvcode.com
   ============================================ */

/* ============================================
   CSS VARIABLES - DESIGN SYSTEM
   ============================================ */

:root {
    /* Colors - Light Mode */
    --color-primary-500: #3B82F6;
    --color-primary-600: #2563EB;
    --color-primary-700: #1D4ED8;
    
    --color-gray-50: #F9FAFB;
    --color-gray-100: #F3F4F6;
    --color-gray-200: #E5E7EB;
    --color-gray-300: #D1D5DB;
    --color-gray-400: #9CA3AF;
    --color-gray-600: #4B5563;
    --color-gray-700: #374151;
    --color-gray-800: #1F2937;
    --color-gray-900: #111827;
    
    --color-success: #10B981;
    --color-error: #EF4444;
    --color-warning: #F59E0B;
    
    /* Semantic Colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: var(--color-gray-50);
    --bg-card: var(--color-gray-100);
    --text-primary: var(--color-gray-900);
    --text-secondary: var(--color-gray-600);
    --border-color: var(--color-gray-200);
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-base: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-base: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease;
    --transition-slow: 0.3s ease;
}

/* Dark Mode */
[data-theme="dark"] {
    --color-primary-500: #60A5FA;
    --color-primary-600: #3B82F6;
    --color-primary-700: #2563EB;
    
    --bg-primary: var(--color-gray-900);
    --bg-secondary: var(--color-gray-800);
    --bg-card: var(--color-gray-800);
    --text-primary: var(--color-gray-50);
    --text-secondary: var(--color-gray-400);
    --border-color: var(--color-gray-700);
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-base: 0 1px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4), 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5), 0 4px 6px rgba(0, 0, 0, 0.4);
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.5;
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* ============================================
   LAYOUT
   ============================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

/* ============================================
   HEADER
   ============================================ */

.header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-4) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background-color var(--transition-base), border-color var(--transition-base);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    text-decoration: none;
    color: var(--text-primary);
}

.logo-img {
    height: 32px;
    width: auto;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
}

.nav {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-base);
}

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

.theme-toggle {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-base);
    padding: var(--space-2) var(--space-3);
    cursor: pointer;
    font-size: 1.25rem;
    transition: all var(--transition-base);
}

.theme-toggle:hover {
    background: var(--border-color);
    transform: translateY(-1px);
}

/* ============================================
   MAIN CONTENT
   ============================================ */

.main {
    padding: var(--space-8) 0;
    min-height: calc(100vh - 200px);
}

.tool-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.tool-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.tool-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.tool-content {
    background: var(--bg-primary);
    padding: var(--space-6);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-base);
    margin-bottom: var(--space-8);
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: var(--space-8) 0 var(--space-4);
    margin-top: var(--space-12);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-8);
    margin-bottom: var(--space-6);
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: var(--space-3);
    color: var(--text-primary);
}

.footer-section p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-2);
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color var(--transition-base);
}

.footer-links a:hover {
    color: var(--color-primary-500);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-4);
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ============================================
   TOAST NOTIFICATION
   ============================================ */

.toast {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    background: var(--color-success);
    color: white;
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-base);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 500;
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-base);
    pointer-events: none;
    z-index: 1000;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

.toast-icon {
    font-size: 1.25rem;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-3);
    }
    
    .tool-header h1 {
        font-size: 2rem;
    }
    
    .nav {
        gap: var(--space-2);
    }
    
    .nav-link {
        font-size: 0.875rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

*:focus-visible {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}