/* Modern CSS Design System - Glassmorphism & Neon Glow */
:root {
    --bg-color: #0b0d19;
    --card-bg: rgba(18, 22, 41, 0.65);
    --card-border: rgba(255, 255, 255, 0.08);
    --card-border-hover: rgba(0, 229, 255, 0.3);
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --accent-cyan: #00e5ff;
    --accent-purple: #7c4dff;
    --accent-glow: rgba(0, 229, 255, 0.15);
    
    --success: #00e676;
    --error: #ff1744;
    
    --font-main: 'Outfit', sans-serif;
    
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    position: relative;
}

/* Background animated glow */
.background-glow {
    position: absolute;
    top: -10%;
    left: -10%;
    width: 120%;
    height: 120%;
    z-index: -1;
    background: 
        radial-gradient(circle at 20% 30%, rgba(124, 77, 255, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(0, 229, 255, 0.12) 0%, transparent 45%);
    filter: blur(80px);
    animation: glow-shift 20s infinite alternate ease-in-out;
}

@keyframes glow-shift {
    0% {
        transform: translate(0, 0) scale(1);
    }
    100% {
        transform: translate(2%, 2%) scale(1.05);
    }
}

.container {
    max-width: 1280px;
    width: 100%;
    margin: 0 auto;
    padding: 2.5rem 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Header Styles */
.app-header {
    text-align: center;
    margin-bottom: 1rem;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.logo h1 {
    font-size: 2.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 300;
}

/* Workspace Grid */
.workspace-grid {
    display: grid;
    grid-template-columns: 1.1fr 1.3fr;
    gap: 2rem;
    flex: 1;
}

@media (max-width: 900px) {
    .workspace-grid {
        grid-template-columns: 1fr;
    }
}

.panel-left, .panel-right {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Glassmorphic Card base */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 1.75rem;
    transition: var(--transition-smooth);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.card:hover {
    border-color: rgba(255, 255, 255, 0.15);
}

.card h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    letter-spacing: -0.2px;
}

/* Drag & Drop zone */
.upload-card {
    padding: 0;
    overflow: hidden;
}

.dropzone {
    width: 100%;
    padding: 3.5rem 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    border-radius: 20px;
}

.file-input-hidden {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.dropzone-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    pointer-events: none; /* Let input handle clicks */
}

.upload-icon {
    background: rgba(0, 229, 255, 0.06);
    border: 1px solid rgba(0, 229, 255, 0.15);
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.5rem;
    transition: var(--transition-smooth);
    box-shadow: 0 0 15px transparent;
}

.dropzone:hover .upload-icon, .dropzone.dragover .upload-icon {
    transform: translateY(-5px) scale(1.05);
    background: rgba(0, 229, 255, 0.12);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 25px var(--accent-glow);
}

.dropzone.dragover {
    background: rgba(0, 229, 255, 0.03);
    border: 2px dashed var(--accent-cyan);
}

.dropzone h3 {
    font-size: 1.2rem;
    font-weight: 500;
}

.dropzone p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.file-specs {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* Settings Form elements */
.settings-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.settings-group:last-child {
    margin-bottom: 0;
}

.settings-group label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.custom-select {
    width: 100%;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    font-family: var(--font-main);
    font-size: 0.95rem;
    outline: none;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.custom-select:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 10px var(--accent-glow);
}

/* Color picker panel */
.color-options {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    background: rgba(0, 0, 0, 0.2);
    padding: 0.75rem 1rem;
    border-radius: 12px;
    border: 1px solid var(--card-border);
}

.color-pick-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.color-pick-wrapper input[type="color"] {
    -webkit-appearance: none;
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    background: none;
}

.color-pick-wrapper input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-pick-wrapper input[type="color"]::-webkit-color-swatch {
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
}

#color-hex {
    font-family: monospace;
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.presets {
    display: flex;
    gap: 0.5rem;
    margin-left: auto;
}

.preset-btn {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.preset-btn:hover {
    transform: scale(1.15);
}

.preset-btn.active {
    border-color: var(--text-primary);
}

/* File list card styles */
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
}

.card-header h2 {
    margin-bottom: 0;
}

.text-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-main);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.text-btn:not([disabled]):hover {
    color: var(--error);
}

.text-btn[disabled] {
    cursor: not-allowed;
    opacity: 0.5;
}

.list-empty {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.file-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-height: 250px;
    overflow-y: auto;
    padding-right: 0.25rem;
}

/* Custom Scrollbar for list */
.file-list::-webkit-scrollbar {
    width: 6px;
}

.file-list::-scrollbar {
    width: 6px;
}

.file-list::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
    border-radius: 10px;
}

.file-list::-webkit-scrollbar-thumb {
    background: var(--card-border);
    border-radius: 10px;
}

.file-list::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

.file-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 0.85rem 1.25rem;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.file-item:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.2);
}

.file-item.selected {
    background: rgba(0, 229, 255, 0.04);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 10px rgba(0, 229, 255, 0.08);
}

.file-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    min-width: 0;
}

.file-name {
    font-size: 0.95rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-meta {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.file-status {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--success);
}

.btn-remove {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: var(--transition-smooth);
}

.btn-remove:hover {
    color: var(--error);
    background: rgba(255, 23, 68, 0.08);
}

/* Details and statistics card */
.details-card {
    background: linear-gradient(145deg, rgba(20, 24, 45, 0.8), rgba(12, 14, 28, 0.85));
    border-color: rgba(0, 229, 255, 0.15);
}

.details-header {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.badge {
    background: rgba(124, 77, 255, 0.15);
    color: #b39ddb;
    border: 1px solid rgba(124, 77, 255, 0.3);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    align-self: flex-start;
    letter-spacing: 0.5px;
}

.details-card h2 {
    margin-bottom: 0;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    margin-bottom: 1.75rem;
}

.stat-box {
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--card-border);
    border-radius: 14px;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    transition: var(--transition-smooth);
}

.stat-box:hover {
    border-color: rgba(255, 255, 255, 0.12);
    background: rgba(0, 0, 0, 0.35);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
}

.preview-actions {
    display: flex;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 1.5rem;
    border-radius: 12px;
    font-family: var(--font-main);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    width: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(0, 229, 255, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 229, 255, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

/* Footer style */
.app-footer {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: auto;
}

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