/* ============================================
   LinkOps - Main Application Styles
   Theme: Gray Fabric (Default)
   ============================================ */

/* CSS Variables for Theme Support */
:root {
    /* Colors - More translucent, woven gray/black aesthetic */
    --bg-primary: #0b0f14;
    --bg-secondary: rgba(15, 18, 22, 0.65);
    --bg-panel: rgba(18, 20, 24, 0.45);
    --bg-card: rgba(22, 24, 28, 0.35);
    --bg-hover: rgba(255, 255, 255, 0.03);
    --bg-active: rgba(255, 255, 255, 0.05);
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    --border-focus: rgba(140, 160, 200, 0.4);
    
    --text-primary: #e8edf2;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --accent-primary: #7a9fd8;
    --accent-hover: #94b3e3;
    
    --success-color: #4ade80;
    --warning-color: #fbbf24;
    --error-color: #f87171;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
    
    /* Layout */
    --topbar-height: 56px;
    --tabnav-height: 48px;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    background-image: url('../assets/background/bg_gray_fabric.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* App Container */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ============================================
   Top Bar
   ============================================ */

.top-bar {
    height: var(--topbar-height);
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(20px) saturate(120%);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.top-bar-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.app-icon {
    height: 32px;
    width: auto;
}

.app-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

/* Theme Selector */
.theme-selector {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 4px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.theme-btn {
    width: 32px;
    height: 32px;
    padding: 0;
    background: transparent;
    border: 2px solid transparent;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

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

.theme-btn.active {
    border-color: var(--accent-primary);
    background: var(--bg-active);
}

.theme-swatch {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: transform 0.2s ease;
}

.theme-btn:hover .theme-swatch {
    transform: scale(1.1);
}

.gray-swatch {
    background: linear-gradient(135deg, #4b5563 0%, #1f2937 100%);
}

.blue-swatch {
    background: linear-gradient(135deg, #3b82f6 0%, #1e40af 100%);
}

.leather-swatch {
    background: linear-gradient(135deg, #374151 0%, #111827 100%);
}

/* Git Status */
.git-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 6px 12px;
    background: rgba(74, 222, 128, 0.08);
    border: 1px solid rgba(74, 222, 128, 0.15);
    border-radius: 6px;
}

.git-indicator {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.git-text {
    font-size: 13px;
    color: var(--success-color);
    font-weight: 500;
}

/* User Menu */
.user-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.user-name {
    font-size: 14px;
    color: var(--text-secondary);
}

.logout-btn {
    padding: 6px 12px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 13px;
    font-family: var(--font-primary);
    cursor: pointer;
    transition: all 0.2s ease;
}

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

/* ============================================
   Tab Navigation
   ============================================ */

.tab-navigation {
    height: var(--tabnav-height);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-lg);
    gap: var(--spacing-xs);
    position: sticky;
    top: var(--topbar-height);
    z-index: 99;
    backdrop-filter: blur(16px) saturate(120%);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

.tab-button {
    padding: 10px 20px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 600;
    font-family: var(--font-primary);
    letter-spacing: 0.05em;
    cursor: pointer;
    position: relative;
    transition: all 0.2s ease;
    border-radius: 6px;
}

.tab-button:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.tab-button.active {
    color: var(--accent-primary);
    background: var(--bg-active);
}

.tab-button.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-primary);
}

/* ============================================
   Content Area
   ============================================ */

.content-area {
    flex: 1;
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease-out;
}

.tab-content.active {
    display: block;
}

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

/* ============================================
   Cards
   ============================================ */

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    backdrop-filter: blur(16px) saturate(120%);
    overflow: hidden;
    box-shadow: 
        inset 0 1px 0 rgba(255, 255, 255, 0.03),
        0 2px 8px rgba(0, 0, 0, 0.3);
}

.card-header {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.card-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.card-body {
    padding: var(--spacing-lg);
}

/* Icon Button */
.icon-btn {
    width: 32px;
    height: 32px;
    padding: 0;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

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

/* ============================================
   Placeholder Content
   ============================================ */

.placeholder-content {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    color: var(--text-secondary);
}

.placeholder-content h2 {
    font-size: 24px;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

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

@media (max-width: 768px) {
    .top-bar {
        padding: 0 var(--spacing-md);
    }
    
    .tab-navigation {
        padding: 0 var(--spacing-md);
        overflow-x: auto;
    }
    
    .content-area {
        padding: var(--spacing-md);
    }
    
    .app-title {
        display: none;
    }
    
    .theme-selector {
        display: none;
    }
    
    .git-text {
        display: none;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

/* ============================================
   Accessibility
   ============================================ */

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

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

/* ============================================
   Footer
   ============================================ */

.app-footer {
    background: var(--bg-panel);
    border-top: 1px solid var(--border-color);
    backdrop-filter: blur(20px) saturate(120%);
    padding: var(--spacing-lg);
    margin-top: auto;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.footer-logo {
    height: 24px;
    width: auto;
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.footer-logo:hover {
    opacity: 1;
}

.footer-text {
    font-size: 13px;
    color: var(--text-muted);
}

/* ============================================
   Theme Variations
   ============================================ */

/* Blue Fabric Theme */
body[data-theme="blue"] {
    background-image: url('../assets/background/bg_blue_fabric.png');
}

body[data-theme="blue"] {
    --accent-primary: #60a5fa;
    --accent-hover: #93c5fd;
}

/* Charcoal Leather Theme */
body[data-theme="leather"] {
    background-image: url('../assets/background/bg_rich_charcoal_leather.png');
}

body[data-theme="leather"] {
    --accent-primary: #9ca3af;
    --accent-hover: #d1d5db;
    --text-primary: #f3f4f6;
}