/* Modern Design Variables */
:root {
    --bg-primary: #0a0d16;
    --bg-secondary: rgba(16, 22, 38, 0.85);
    --bg-card: rgba(22, 30, 52, 0.95);
    --bg-input: #121826;
    
    --accent-color: #1e40af;
    --accent-glow: rgba(30, 64, 175, 0.45);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-color-hover: rgba(255, 255, 255, 0.16);
    --border-color-active: var(--accent-color);
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-display: 'Outfit', sans-serif;
    
    --shadow-premium: 0 20px 40px -15px rgba(0, 0, 0, 0.7);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--bg-primary);
    background-image: 
        radial-gradient(at 0% 0%, rgba(30, 64, 175, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(59, 130, 246, 0.1) 0px, transparent 50%);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: stretch;
    overflow-x: hidden;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--bg-input);
    border-radius: 4px;
    border: 1px solid var(--border-color);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* App Layout Container */
.app-container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Header Design */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 28px;
    background: var(--bg-secondary);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: var(--shadow-premium);
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 16px;
    position: relative;
}

.logo-glow {
    position: absolute;
    width: 48px;
    height: 48px;
    background: var(--accent-color);
    filter: blur(20px);
    opacity: 0.5;
    border-radius: 50%;
    z-index: 0;
    transition: var(--transition-smooth);
}

.header-logo {
    width: 42px;
    height: 42px;
    object-fit: contain;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 4px;
    position: relative;
    z-index: 1;
}

.logo-text h1 {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 800;
    letter-spacing: -0.5px;
    line-height: 1.2;
}

.accent-text {
    background: linear-gradient(135deg, #60a5fa, var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: var(--transition-smooth);
}

.tagline {
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

/* Status light */
.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    padding: 6px 14px;
    border-radius: 30px;
    font-size: 13px;
    color: #10b981;
    font-weight: 600;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background-color: #10b981;
    border-radius: 50%;
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    animation: pulse 1.6s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    }
    70% {
        transform: scale(1);
        box-shadow: 0 0 0 6px rgba(16, 185, 129, 0);
    }
    100% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

/* Main Workspace Grid */
.workspace {
    display: grid;
    grid-template-columns: 420px 1fr;
    gap: 24px;
    align-items: start;
    flex-grow: 1;
}

/* Section Common Titles */
.section-title {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.section-title i {
    width: 20px;
    height: 20px;
    color: var(--accent-color);
    transition: var(--transition-smooth);
}

.section-title h2 {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 600;
}

/* Control Panel (Sidebar) styling */
.controls-panel {
    background: var(--bg-secondary);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 28px;
    box-shadow: var(--shadow-premium);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Control Group styling */
.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.2px;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 14px;
    width: 18px;
    height: 18px;
    color: var(--text-muted);
    pointer-events: none;
    transition: var(--transition-smooth);
}

.input-wrapper input {
    width: 100%;
    padding: 12px 14px 12px 42px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 14px;
    transition: var(--transition-smooth);
    outline: none;
}

.input-wrapper input:hover {
    border-color: var(--border-color-hover);
}

.input-wrapper input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.input-wrapper input:focus + .input-icon {
    color: var(--accent-color);
}

/* Validation Message */
.validation-msg {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    padding: 6px 10px;
    border-radius: 6px;
    transition: var(--transition-smooth);
    margin-top: 4px;
}

.validation-msg.valid {
    color: #10b981;
    background: rgba(16, 185, 129, 0.06);
}

.validation-msg.invalid {
    color: #ef4444;
    background: rgba(239, 68, 68, 0.06);
}

.val-icon {
    width: 14px;
    height: 14px;
}

/* Buttons Common */
.btn {
    width: 100%;
    padding: 14px 20px;
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: var(--transition-smooth);
    border: none;
    outline: none;
}

.btn-primary {
    background: var(--accent-color);
    color: white;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px var(--accent-glow), inset 0 -3px 0 rgba(0, 0, 0, 0.2);
}

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

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
    border-color: var(--border-color-hover);
}

/* Preview Panel (Main Area) */
.preview-panel {
    background: var(--bg-secondary);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 28px;
    box-shadow: var(--shadow-premium);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    position: sticky;
    top: 24px;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.preview-header .section-title {
    margin-bottom: 0;
}

.preview-badge {
    background: rgba(59, 130, 246, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.15);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
    color: #60a5fa;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Canvas Container with ambient glows */
.canvas-container {
    position: relative;
    width: 100%;
    max-width: 480px;
    border-radius: 20px;
    background: #000;
    padding: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 30px 60px -20px rgba(0, 0, 0, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.canvas-glow {
    position: absolute;
    inset: -2px;
    background: linear-gradient(135deg, var(--accent-color), #3b82f6);
    border-radius: 22px;
    z-index: -1;
    filter: blur(16px);
    opacity: 0.35;
    transition: var(--transition-smooth);
}

#previewImage {
    max-width: 100%;
    height: auto;
    aspect-ratio: 1000 / 1150;
    border-radius: 14px;
    background-color: white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    /* Make rendering super sharp on mobile screens */
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
    display: block;
}

.action-buttons {
    width: 100%;
    max-width: 480px;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
    .workspace {
        grid-template-columns: 1fr;
    }
    
    .preview-panel {
        position: static;
    }
}

@media (max-width: 640px) {
    body {
        padding: 0;
    }
    
    .app-container {
        padding: 12px;
        gap: 16px;
    }
    
    .app-header {
        padding: 14px 20px;
        border-radius: 12px;
    }
    
    .logo-text h1 {
        font-size: 20px;
    }
    
    .workspace {
        gap: 16px;
    }
    
    .controls-panel,
    .preview-panel {
        padding: 20px;
        border-radius: 12px;
    }
}