:root {
    --primary: hsl(260, 85%, 60%);
    --primary-hover: hsl(260, 85%, 55%);
    --bg-dark: hsl(230, 20%, 8%);
    --bg-card: hsla(230, 20%, 12%, 0.8);
    --glass: hsla(0, 0%, 100%, 0.05);
    --glass-border: hsla(0, 0%, 100%, 0.1);
    --text-main: hsl(0, 0%, 95%);
    --text-muted: hsl(230, 10%, 60%);
    --success: hsl(150, 80%, 50%);
    --radius-lg: 20px;
    --radius-md: 12px;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    background-image: 
        radial-gradient(circle at 10% 20%, hsla(260, 80%, 40%, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, hsla(190, 80%, 40%, 0.1) 0%, transparent 40%);
    overflow-x: hidden;
}

.app-container {
    width: 100%;
    max-width: 1200px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

header {
    text-align: center;
    animation: fadeInDown 0.8s ease-out;
}

header .logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.8rem;
    margin-bottom: 0.5rem;
}

header h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(to right, #fff, var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header .tagline {
    color: var(--text-muted);
    font-size: 1.1rem;
}

main {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 2rem;
    align-items: start;
}

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

.upload-section {
    position: relative;
    background: var(--bg-card);
    border: 2px dashed var(--glass-border);
    border-radius: var(--radius-lg);
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    background-image: 
        linear-gradient(45deg, hsla(0, 0%, 0%, 0.1) 25%, transparent 25%),
        linear-gradient(-45deg, hsla(0, 0%, 0%, 0.1) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, hsla(0, 0%, 0%, 0.1) 75%),
        linear-gradient(-45deg, transparent 75%, hsla(0, 0%, 0%, 0.1) 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

.upload-section.drag-over {
    border-color: var(--primary);
    background: hsla(260, 85%, 60%, 0.05);
}

.upload-content {
    text-align: center;
    z-index: 10;
}

.upload-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: float 3s ease-in-out infinite;
}

.upload-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.upload-content p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.preview-container {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

#outputCanvas {
    max-width: 100%;
    max-height: calc(100vh - 300px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    border-radius: 8px;
    background-color: #000;
}

.hidden {
    display: none !important;
}

.controls-section {
    padding: 2rem;
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    gap: 2rem;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    animation: fadeInRight 0.8s ease-out;
}

.glass {
    background: hsla(0, 0%, 100%, 0.03);
}

.tabs {
    display: flex;
    gap: 0.5rem;
    background: var(--glass);
    padding: 0.4rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
}

.tab-btn {
    flex: 1;
    padding: 0.6rem;
    font-size: 0.85rem;
    border-radius: 8px;
    background: transparent;
    color: var(--text-muted);
}

.tab-btn.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 10px hsla(260, 85%, 60%, 0.3);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.label-row label {
    font-weight: 500;
    color: var(--text-muted);
}

.value-badge {
    background: var(--primary);
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
}

input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    background: var(--glass-border);
    border-radius: 3px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px var(--primary);
    transition: all 0.2s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    border-top: 1px solid var(--glass-border);
    padding-top: 1.5rem;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.info-item .label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-item .value {
    font-size: 1.1rem;
    font-weight: 700;
    font-family: 'Outfit', sans-serif;
}

.actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

button {
    cursor: pointer;
    padding: 1rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    transition: all 0.3s ease;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px hsla(260, 85%, 60%, 0.4);
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-success:disabled {
    background: var(--text-muted);
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-success:not(:disabled):hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px hsla(150, 80%, 50%, 0.4);
}

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

.btn-outline:hover {
    background: var(--glass);
    border-color: var(--text-muted);
}

footer {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    padding: 1rem;
}

/* Animations */
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInRight {
    from { opacity: 0; transform: translateX(20px); }
    to { opacity: 1; transform: translateX(0); }
}

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