:root {
    --bg-color: #0f172a;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-color: #e2e8f0;
    --primary-color: #38bdf8;
    --primary-hover: #0ea5e9;
    --secondary-bg: rgba(255, 255, 255, 0.1);
    --secondary-hover: rgba(255, 255, 255, 0.2);
    --font-family: 'Outfit', sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(at 0% 0%, hsla(253,16%,7%,1) 0, transparent 50%), 
        radial-gradient(at 50% 0%, hsla(225,39%,30%,1) 0, transparent 50%), 
        radial-gradient(at 100% 0%, hsla(339,49%,30%,1) 0, transparent 50%);
    color: var(--text-color);
    height: 100vh;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

.app-container {
    display: grid;
    grid-template-columns: 1fr 200px 1fr;
    gap: 20px;
    width: 95vw;
    height: 90vh;
    max-width: 1600px;
}

.pane {
    display: flex;
    flex-direction: column;
    border-radius: 20px;
    overflow: hidden;
}

.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

.pane-header {
    padding: 20px;
    border-bottom: 1px solid var(--glass-border);
    text-align: center;
}

.pane-header h2 {
    font-weight: 600;
    font-size: 1.2rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--primary-color);
}

.pane-content {
    flex: 1;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    overflow-y: auto;
}

/* Left Pane Specifics */
.upload-area {
    border: 2px dashed var(--glass-border);
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
}

.upload-area.dragover {
    background: rgba(56, 189, 248, 0.1);
    border-color: var(--primary-color);
}

.divider {
    display: flex;
    align-items: center;
    text-align: center;
    color: rgba(255, 255, 255, 0.3);
    font-size: 0.8rem;
}

.divider::before, .divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--glass-border);
}

.divider span {
    padding: 0 10px;
}

textarea {
    width: 100%;
    height: 150px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 15px;
    color: var(--text-color);
    font-family: monospace;
    resize: none;
}

textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.preview-area, .image-preview-area {
    flex: 1;
    background: rgba(0, 0, 0, 0.2); /* Darker background for contrast */
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    position: relative;
    min-height: 200px;
    background-image: 
        linear-gradient(45deg, #1e293b 25%, transparent 25%), 
        linear-gradient(-45deg, #1e293b 25%, transparent 25%), 
        linear-gradient(45deg, transparent 75%, #1e293b 75%), 
        linear-gradient(-45deg, transparent 75%, #1e293b 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

.preview-area svg, .image-preview-area img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.placeholder-text {
    color: rgba(255, 255, 255, 0.3);
    font-style: italic;
}

/* Center Pane Specifics */
.center-pane {
    justify-content: center;
    align-items: center;
    background: transparent; /* Make center pane less intrusive */
    border: none;
    box-shadow: none;
    backdrop-filter: none;
}

.controls {
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: center;
    width: 100%;
}

.arrow-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 10px;
    opacity: 0.8;
}

/* Right Pane Specifics */
.action-buttons {
    display: flex;
    gap: 10px;
}

.action-buttons button {
    flex: 1;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-family: var(--font-family);
    font-weight: 600;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.btn.primary {
    background: var(--primary-color);
    color: #0f172a;
    width: 100%;
    box-shadow: 0 4px 15px rgba(56, 189, 248, 0.3);
}

.btn.primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(56, 189, 248, 0.4);
}

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

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

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}