/* Glassmorphism and Animation Styles */

/* CSS Variables for consistent dark theming */
:root {
    --glass-bg: rgba(20, 20, 30, 0.25);
    --glass-bg-dark: rgba(15, 15, 25, 0.4);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-backdrop: blur(15px);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --glass-hover: rgba(40, 40, 60, 0.3);
    --border-radius: 15px;
    --border-radius-small: 8px;
    --animation-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --text-light: rgba(255, 255, 255, 0.9);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --gradient-primary: linear-gradient(135deg, #1a1a2e 0%, #16213e 25%, #0f3460 50%, #533483 75%, #7209b7 100%);
    --gradient-secondary: linear-gradient(45deg, #0f0f23, #1a1a2e, #16213e, #0f3460);
    --accent-color: #bb86fc;
    --accent-hover: #9965f4;
}

/* Light theme variables */
[data-theme="light"] {
    --glass-bg: rgba(255, 255, 255, 0.25);
    --glass-bg-dark: rgba(240, 240, 255, 0.4);
    --glass-border: rgba(0, 0, 0, 0.1);
    --glass-backdrop: blur(15px);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --glass-hover: rgba(200, 200, 220, 0.3);
    --text-light: rgba(0, 0, 0, 0.9);
    --text-primary: #333333;
    --text-secondary: rgba(0, 0, 0, 0.8);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 25%, #f093fb 50%, #f5576c 75%, #4facfe 100%);
    --gradient-secondary: linear-gradient(45deg, #a8edea, #fed6e3, #ffecd2, #fcb69f);
    --accent-color: #667eea;
    --accent-hover: #5a6fd8;
}

/* Animated Background */
body {
    background: var(--gradient-primary);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    color: #333;
    overflow-x: hidden;
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

/* Floating particles animation with dark theme */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(187, 134, 252, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(121, 9, 183, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(15, 52, 96, 0.25) 0%, transparent 50%),
        radial-gradient(circle at 60% 60%, rgba(26, 26, 46, 0.3) 0%, transparent 50%);
    animation: float 25s ease-in-out infinite;
    pointer-events: none;
    z-index: -1;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
        opacity: 1;
    }
    33% {
        transform: translateY(-20px) rotate(120deg);
        opacity: 0.8;
    }
    66% {
        transform: translateY(20px) rotate(240deg);
        opacity: 0.6;
    }
}

/* Main container with dark glassmorphism */
.container {
    background: var(--glass-bg-dark);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Glass container styles */
.glass-container {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    box-shadow: var(--glass-shadow);
    transition: var(--animation-smooth);
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    box-shadow: var(--glass-shadow);
    padding: 1.5rem;
    transition: var(--animation-smooth);
}

.glass-card:hover {
    background: var(--glass-hover);
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(31, 38, 135, 0.5);
}

/* Glass button styles */
.glass-btn {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-small);
    color: white;
    padding: 0.75rem 1rem;
    font-weight: 500;
    transition: var(--animation-smooth);
    cursor: pointer;
}

.glass-btn:hover {
    background: var(--glass-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(31, 38, 135, 0.4);
}

.glass-btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

/* Selection dropdown specific styles for dark theme */
.selection-dropdown {
    background: var(--glass-bg-dark);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-small);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    font-weight: 500;
    transition: var(--animation-smooth);
    width: 100%;
}

.selection-dropdown option {
    background: rgba(26, 26, 46, 0.95);
    color: var(--text-primary);
    padding: 0.5rem;
}

.selection-dropdown:hover {
    border-color: var(--accent-color);
}

.selection-dropdown:focus {
    border-color: var(--accent-hover);
    box-shadow: 0 0 0 3px rgba(187, 134, 252, 0.2);
}

/* Enhanced sidebar styling with dark theme */
.left-sidebar {
    background: var(--glass-bg-dark);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border-right: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

/* Enhanced right pane styling with dark theme */
.right-pane {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
}

/* Welcome message styling with dark theme */
.welcome-message {
    background: var(--glass-bg-dark);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    box-shadow: var(--glass-shadow);
    padding: 3rem;
    margin: 2rem;
    text-align: center;
    color: var(--text-primary);
}

.welcome-message h2 {
    color: var(--text-primary);
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    background: linear-gradient(45deg, var(--accent-color), #ffffff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.welcome-message p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.6;
}

/* Breadcrumb styling */
.breadcrumb {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    box-shadow: var(--glass-shadow);
    color: white;
}

/* File list styling */
.file-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.file-item {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-small);
    margin-bottom: 0.5rem;
    padding: 1rem;
    transition: var(--animation-smooth);
    cursor: pointer;
}

.file-item:hover {
    background: var(--glass-hover);
    transform: translateX(5px);
    box-shadow: 0 6px 20px rgba(31, 38, 135, 0.4);
}

.file-name {
    color: white;
    font-weight: 600;
    font-size: 0.9rem;
}

.file-path {
    color: var(--text-light);
    font-size: 0.75rem;
    font-family: monospace;
    margin-top: 0.25rem;
    opacity: 0.8;
}

/* Selection labels with dark theme */
.selection-label {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}

.selection-title {
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 1rem;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
    background: linear-gradient(45deg, var(--accent-color), #ffffff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Iframe container styling */
.iframe-container {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    box-shadow: var(--glass-shadow);
    margin: 1rem;
    overflow: hidden;
}

.iframe-header {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border-bottom: 1px solid var(--glass-border);
    color: white;
    padding: 1rem 1.5rem;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.close-viewer {
    background: rgba(220, 53, 69, 0.8);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid rgba(220, 53, 69, 0.4);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-small);
    cursor: pointer;
    transition: var(--animation-smooth);
}

.close-viewer:hover {
    background: rgba(220, 53, 69, 1);
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(220, 53, 69, 0.4);
}

/* Floating animation for elements */
.floating-element {
    animation: floatGentle 6s ease-in-out infinite;
}

@keyframes floatGentle {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* Pulse animation for interactive elements */
.pulse-element {
    animation: pulseGlow 2s ease-in-out infinite;
}

@keyframes pulseGlow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(255, 255, 255, 0.3);
    }
    50% {
        box-shadow: 0 0 20px rgba(255, 255, 255, 0.6), 0 0 30px rgba(255, 255, 255, 0.4);
    }
}

/* Loading states with glassmorphism */
.glass-loading {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    box-shadow: var(--glass-shadow);
    padding: 2rem;
}

/* Responsive design adjustments */
@media (max-width: 768px) {
    /* Glass card mobile improvements */
    .glass-card {
        padding: 1rem;
        margin: 0.5rem;
        border-radius: 12px;
    }
    
    /* Selection dropdown mobile improvements */
    .selection-dropdown {
        font-size: 16px; /* Prevents zoom on iOS */
        padding: 14px 16px;
        border-radius: 8px;
        min-height: 48px; /* Touch-friendly height */
    }
    
    .selection-group {
        margin-bottom: 1rem;
    }
    
    .selection-label {
        font-size: 0.95rem;
        margin-bottom: 0.75rem;
    }
    
    /* Glass button mobile improvements */
    .glass-btn {
        padding: 12px 16px;
        font-size: 16px; /* Prevents zoom on iOS */
        min-height: 48px; /* Touch-friendly height */
        border-radius: 8px;
    }
    
    /* Welcome message mobile improvements */
    .welcome-message {
        padding: 2rem 1rem;
        margin: 1rem 0.5rem;
        border-radius: 12px;
    }
    
    .welcome-message h2 {
        font-size: 1.75rem;
        margin-bottom: 1rem;
    }
    
    .welcome-message p {
        font-size: 1rem;
        line-height: 1.6;
        margin-bottom: 0.75rem;
    }
    
    /* Iframe container mobile improvements */
    .iframe-container {
        margin: 0.5rem;
        border-radius: 12px;
    }
    
    /* File list mobile improvements */
    .file-item {
        padding: 16px;
        margin-bottom: 12px;
        border-radius: 10px;
        min-height: 60px; /* Touch-friendly height */
    }
    
    .file-name {
        font-size: 1rem;
        margin-bottom: 0.5rem;
    }
    
    .file-path {
        font-size: 0.8rem;
        word-break: break-all;
        line-height: 1.4;
    }
    
    /* Breadcrumb mobile improvements */
    .breadcrumb {
        padding: 1rem;
        border-radius: 10px;
        flex-wrap: wrap;
        gap: 0.5rem;
        line-height: 1.5;
    }
    
    .breadcrumb-separator {
        margin: 0 0.25rem;
    }
    
    /* Navigation panel mobile improvements */
    .navigation-panel {
        border-radius: 12px;
        margin-bottom: 1rem;
    }
    
    /* Current selection mobile improvements */
    .current-selection {
        border-radius: 12px;
        padding: 1rem;
    }
    
    .selection-title {
        font-size: 1.1rem;
        margin-bottom: 1rem;
    }
}

/* Additional mobile breakpoint for smaller devices */
@media (max-width: 480px) {
    .glass-card {
        padding: 0.75rem;
        margin: 0.25rem;
        border-radius: 10px;
    }
    
    .selection-dropdown {
        padding: 12px 14px;
        font-size: 15px;
    }
    
    .glass-btn {
        padding: 10px 14px;
        font-size: 15px;
        min-height: 44px;
    }
    
    .welcome-message {
        padding: 1.5rem 0.75rem;
        margin: 0.5rem 0.25rem;
    }
    
    .welcome-message h2 {
        font-size: 1.5rem;
    }
    
    .welcome-message p {
        font-size: 0.9rem;
    }
    
    .file-item {
        padding: 14px;
        min-height: 56px;
    }
    
    .file-name {
        font-size: 0.9rem;
    }
    
    .file-path {
        font-size: 0.75rem;
    }
    
    .breadcrumb {
        padding: 0.75rem;
        font-size: 0.8rem;
    }
    
    .selection-title {
        font-size: 1rem;
    }
}

/* Landscape orientation adjustments for tablets */
@media (max-width: 1024px) and (orientation: landscape) {
    .main-content {
        flex-direction: row;
    }
    
    .left-sidebar {
        width: 40%;
        min-width: 320px;
        border-right: 1px solid var(--glass-border);
        border-bottom: none;
    }
    
    .resizer {
        display: block;
    }
}

/* Enhanced resizer with glassmorphism */
.resizer {
    background: var(--glass-border);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    transition: var(--animation-smooth);
}

.resizer:hover {
    background: rgba(255, 255, 255, 0.4);
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}