:root {
    --bg-dark: #0a0a0f;
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-hover: rgba(255, 255, 255, 0.06);
    
    --accent-primary: #8b5cf6;
    --accent-secondary: #ec4899;
    --accent-gradient: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.15);
    
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 8px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    line-height: 1.5;
}

/* Dynamic Background Orbs */
.background-elements {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.blob {
    position: absolute;
    filter: blur(120px);
    opacity: 0.4;
    border-radius: 50%;
    animation: float 20s infinite alternate;
}

.blob-1 {
    top: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, var(--accent-primary) 0%, transparent 70%);
}

.blob-2 {
    bottom: -20%;
    right: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, var(--accent-secondary) 0%, transparent 70%);
    animation-delay: -10s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(5%, 10%) scale(1.1); }
}

/* Layout */
.app-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 3rem 1.5rem;
}

.app-header {
    text-align: center;
    margin-bottom: 3rem;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.logo i {
    color: var(--accent-primary);
}

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

.app-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Glassmorphism Panels */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.main-panel {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

@media (max-width: 768px) {
    .main-panel {
        grid-template-columns: 1fr;
    }
}

/* Dropzone */
.dropzone {
    border: 2px dashed var(--glass-border);
    border-radius: var(--radius-md);
    padding: 3rem 2rem;
    text-align: center;
    position: relative;
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    background: rgba(0,0,0,0.2);
}

.dropzone:hover, .dropzone.dragover {
    border-color: var(--accent-primary);
    background: rgba(139, 92, 246, 0.05);
}

.dropzone input[type="file"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.upload-icon {
    font-size: 3rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    transition: var(--transition);
}

.dropzone:hover .upload-icon {
    color: var(--accent-primary);
    transform: translateY(-5px);
}

.dropzone h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.text-highlight {
    color: var(--accent-primary);
    font-weight: 600;
}

.file-limits {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 1rem;
}

/* Settings */
.settings-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.settings-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.settings-group label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 500;
    font-size: 0.95rem;
}

.value-badge {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--accent-secondary);
    font-weight: 600;
}

/* Custom Input Controls */
.styled-slider {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    background: var(--glass-border);
    border-radius: 3px;
    outline: none;
}

.styled-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--text-primary);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(139, 92, 246, 0.5);
    transition: var(--transition);
}

.styled-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.select-wrapper, .input-wrapper {
    position: relative;
    width: 100%;
}

select, input[type="number"] {
    width: 100%;
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 0.875rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition);
    appearance: none;
}

select:focus, input[type="number"]:focus {
    border-color: var(--accent-primary);
    background: rgba(0,0,0,0.5);
}

.select-wrapper i {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    color: var(--text-secondary);
}

.input-wrapper .unit {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
}

/* Action Bar */
.action-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 1rem 1.5rem;
    margin-bottom: 2rem;
}

.badge {
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
}

.badge-success {
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.actions {
    display: flex;
    gap: 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.btn-primary:hover {
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.5);
    transform: translateY(-2px);
}

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

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

/* Results Grid */
.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.result-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.image-preview-container {
    height: 200px;
    background: rgba(0,0,0,0.5);
    position: relative;
    overflow: hidden;
}

.image-preview-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-details {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.file-name {
    font-weight: 600;
    font-size: 1rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.size-comparison {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.size-old {
    text-decoration: line-through;
    opacity: 0.7;
}

.size-new {
    color: var(--success);
    font-weight: 600;
}

.savings-badge {
    align-self: flex-start;
    background: var(--success-bg);
    color: var(--success);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 700;
}

.card-actions {
    margin-top: 0.5rem;
    display: flex;
    gap: 0.5rem;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    flex: 1;
    justify-content: center;
}

/* Utilities */
.hidden {
    display: none !important;
}

/* Loading Overlay */
.loading-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(4px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    z-index: 10;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--glass-border);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    100% { transform: rotate(360deg); }
}