:root {
    --bg-color: #18181b;
    /* Zinc 900 - slightly lighter than pure black */
    --card-bg: #27272a;
    /* Zinc 800 */
    --text-primary: #f4f4f5;
    /* Zinc 100 */
    --text-secondary: #a1a1aa;
    /* Zinc 400 */
    --accent-color: #ff6600;
    /* Yellow 400 - subtle but visible */
    --accent-hover: #ffb84d;
    /* Yellow 500 */
    --border-color: #3f3f46;
    /* Zinc 700 */
    --success-color: #22c55e;
    --font-family: 'Outfit', sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 2rem;
    overflow-y: auto;
    position: relative;
}

/* Back to Admin Button in Nav */
#backToAdminBtn {
    display: none;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-color);
    font-weight: 600;
    margin-left: 1rem;
    padding-left: 1rem;
    border-left: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

#backToAdminBtn:hover {
    color: var(--accent-hover);
    transform: translateX(2px);
}

#backToAdminBtn i {
    font-size: 1.1rem;
}

#backToAdminBtn.show {
    display: flex;
}

/* Background Blobs */
.background-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 20s infinite ease-in-out;
}

.blob-1 {
    top: -10%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #4f46e5, #0000);
    animation-delay: 0s;
}

.blob-2 {
    bottom: -10%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, #c026d3, #0000);
    animation-delay: -5s;
}

.blob-3 {
    top: 40%;
    left: 40%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #06b6d4, #0000);
    animation-delay: -10s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0);
    }

    33% {
        transform: translate(30px, -50px);
    }

    66% {
        transform: translate(-20px, 20px);
    }
}

.page-container {
    width: 100%;
    max-width: 72rem;
    margin: 0 auto;
    padding: 2rem;
}

/* External Header (outside frame) */
.external-header {
    text-align: center;
    margin-bottom: 2rem;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.header-icon {
    font-size: 2.5rem;
    background: linear-gradient(to right, var(--accent-color), #fde047);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.external-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--accent-color), #fde047);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin: 0;
}

.header-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin: 0;
}

.app-container {
    width: 100%;
    background-color: var(--card-bg);
    border-radius: 24px;
    padding: 3rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-color);
}

/* Remove old header styles */
header {
    text-align: center;
    margin-bottom: 3rem;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--accent-color), #fde047);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

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

/* Upload Section */
.drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: 16px;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: rgba(255, 255, 255, 0.02);
}

.drop-zone:hover,
.drop-zone.dragover {
    border-color: var(--accent-color);
    background-color: rgba(250, 204, 21, 0.05);
}

.drop-zone .icon {
    font-size: 3rem;
    display: block;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.browse-btn {
    color: var(--accent-color);
    font-weight: 600;
    text-decoration: underline;
}

/* Controls Section */
.controls-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    animation: fadeIn 0.5s ease;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

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

input[type="number"] {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem;
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: border-color 0.2s;
}

input[type="number"]:focus {
    outline: none;
    border-color: var(--accent-color);
}

/* Button System */
.action-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    color: white;
    flex: 1;
    min-width: 200px;
}

.btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none !important;
}

.btn i {
    font-size: 1.1rem;
}

.btn-primary {
    background: linear-gradient(135deg, #f97316 0%, #fb923c 100%);
    box-shadow: 0 4px 6px -1px rgba(249, 115, 22, 0.3);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(249, 115, 22, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, #8b5cf6 0%, #a78bfa 100%);
    box-shadow: 0 4px 6px -1px rgba(139, 92, 246, 0.3);
}

.btn-secondary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(139, 92, 246, 0.4);
}

.btn:active:not(:disabled) {
    transform: translateY(0);
}

/* Preview Section */
.preview-section {
    margin-top: 3rem;
    animation: slideUp 0.5s ease;
}

.preview-container {
    background-color: var(--bg-color);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

.preview-container h3,
.output-container h3 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
    color: var(--text-primary);
}

.image-wrapper {
    width: 100%;
    height: 300px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-image: radial-gradient(#334155 1px, transparent 1px);
    background-size: 20px 20px;
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.image-wrapper img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.file-info {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-family: monospace;
}

.code-block {
    background-color: #000;
    border-radius: 8px;
    padding: 1rem;
    position: relative;
    border: 1px solid var(--border-color);
}

code {
    font-family: 'Fira Code', monospace;
    color: #fef08a;
    word-break: break-all;
    display: block;
    max-height: 100px;
    overflow-y: auto;
    font-size: 0.9rem;
}

.copy-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background-color: rgba(255, 255, 255, 0.1);
    border: none;
    color: var(--text-primary);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

.copy-btn:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

/* Back to Home Button */
.back-home-btn {
    position: fixed;
    top: 24px;
    left: 24px;
    padding: 12px 24px;
    background: rgba(250, 204, 21, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(250, 204, 21, 0.3);
    border-radius: 30px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: #ff6600;
    text-decoration: none;
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    z-index: 1000;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.back-home-btn:hover {
    background: rgba(250, 204, 21, 0.2);
    border-color: rgba(118, 87, 19, 0.6);
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 10px 20px rgba(250, 204, 21, 0.3);
}

.back-home-btn svg {
    width: 20px;
    height: 20px;
    stroke: #ff6600;
}

.secondary-btn {
    display: block;
    width: 100%;
    text-align: center;
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 1rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s;
    margin-top: 1rem;
}

.secondary-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* Responsive */
@media (max-width: 768px) {
    .page-container {
        padding: 1rem;
        padding-top: 4rem;
        width: 100%;
        overflow-x: hidden;
    }

    .back-home-btn {
        top: 10px;
        left: 10px;
        padding: 8px 16px;
        font-size: 0.9rem;
        z-index: 100;
    }

    .app-container {
        padding: 1rem;
        width: 100%;
    }

    .upload-area {
        padding: 2rem 1rem;
        width: 100%;
        box-sizing: border-box;
    }

    .controls-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
        width: 100%;
    }

    /* Fix image/canvas overflow */
    .preview-container {
        min-height: 200px;
        width: 100%;
        overflow: hidden;
        /* Clip overflow */
    }

    .preview-container img,
    .preview-container canvas {
        max-width: 100%;
        height: auto;
        object-fit: contain;
    }

    .action-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        justify-content: center;
        margin: 0;
        /* Reset margins */
    }

    input[type="number"],
    select {
        width: 100%;
        box-sizing: border-box;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

header {
    animation: fadeInDown 1s ease-out;
}

main {
    animation: fadeInUp 1s ease-out 0.2s backwards;
}