:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --border: #222222;
    --border-light: #333333;
    --text-primary: #eeeeee;
    --text-secondary: #999999;
    --text-tertiary: #666666;
    --accent: #0084ff;
    --accent-hover: #0073e6;
    --error: #ff4444;
    --success: #00aa44;
}

[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f9f9f9;
    --border: #d3d3d3;
    --border-light: #bbbbbb;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --accent: #0084ff;
    --accent-hover: #0073e6;
    --error: #dd3333;
    --success: #00aa44;
}

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

html {
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    border-bottom: 1px solid var(--border);
    padding: 24px 0;
}

.header-inner {
    max-width: 680px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.brand-link {
    text-decoration: none;
    color: inherit;
    display: inline-block;
    cursor: pointer;
    transition: color 0.2s ease;
}

.brand-link:hover {
    color: var(--accent);
}

.brand-link:hover .brand-label {
    color: var(--accent);
}

.brand-label {
    font-size: 10px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--text-tertiary);
    font-weight: 600;
}

header h1 {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.theme-toggle {
    width: 32px;
    height: 32px;
    border: 1px solid var(--border);
    background: var(--bg-primary);
    color: var(--text-secondary);
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

.theme-toggle:hover {
    border-color: var(--border-light);
    color: var(--text-primary);
}

main {
    flex: 1;
    padding: 48px 0;
}

.content {
    display: flex;
    gap: 0;
    max-width: 100%;
    margin: 0 auto;
    padding: 0;
    justify-content: center;
    align-items: flex-start;
}

.main-content-wrapper {
    max-width: 680px;
    padding: 0 24px;
    flex: 0 1 680px;
}

/* Error Banner */
.error-banner {
    padding: 12px 16px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--error);
    border-radius: 4px;
    color: var(--error);
    margin-bottom: 24px;
    font-size: 14px;
}

/* Upload Section */
.upload-section {
    margin-bottom: 24px;
}

.upload-container {
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 48px 24px;
    text-align: center;
    cursor: pointer;
    background-color: var(--bg-secondary);
}

.upload-container:hover {
    border-color: var(--border-light);
    background-color: var(--bg-primary);
}

.upload-container.drag-over {
    border-color: var(--accent);
    background-color: var(--bg-primary);
}

.file-input {
    display: none;
}

.upload-content h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.upload-hint {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.upload-details {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-bottom: 24px;
}

.btn-secondary {
    display: inline-block;
    padding: 8px 16px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
}

.btn-secondary:hover {
    background-color: var(--bg-secondary);
    border-color: var(--border-light);
}

/* Preview Section */
.preview-section {
    margin: 24px 0;
    padding: 20px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
}

.preview-image {
    display: block;
    max-width: 100%;
    max-height: 300px;
    margin: 0 auto 16px;
    border-radius: 4px;
}

.preview-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.meta-label {
    font-size: 12px;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.meta-value {
    font-size: 14px;
    color: var(--text-primary);
    word-break: break-all;
}

.btn-remove {
    width: 100%;
    padding: 8px;
    background-color: var(--bg-primary);
    color: var(--error);
    border: 1px solid var(--error);
    border-radius: 4px;
    font-size: 13px;
    cursor: pointer;
}

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

/* Upload Button - Minimalist Neutral Style */
.btn-primary {
    width: 100%;
    padding: 10px 16px;
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    margin-top: 24px;
    transition: all 150ms;
}

.btn-primary:hover:not(:disabled) {
    border-color: var(--text-primary);
    background-color: var(--bg-secondary);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Ad Placements - Left and Right Sidebars */
.ad-left {
    flex: 0 0 auto;
    width: 160px;
    padding: 10px 0 0 0;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    z-index: 100;
    background-color: var(--bg-primary);
    min-height: 600px;
    position: relative;
}

.ad-right {
    flex: 0 0 auto;
    width: 160px;
    padding: 10px 0 0 0;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    z-index: 100;
    background-color: var(--bg-primary);
    min-height: 600px;
}

.result-section {
    animation: fadeIn 200ms;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.result-image-container {
    margin-bottom: 32px;
}

.result-image {
    display: block;
    max-width: 100%;
    max-height: 400px;
    margin: 0 auto;
    border-radius: 6px;
    border: 1px solid var(--border);
}

.urls-list {
    margin-bottom: 24px;
}

.url-box {
    padding: 16px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    margin-bottom: 16px;
}

.url-label {
    display: block;
    font-size: 12px;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.url-row {
    display: flex;
    gap: 8px;
}

.url-input {
    flex: 1;
    padding: 8px 12px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 13px;
    font-family: 'Monaco', 'Menlo', 'Courier New', monospace;
    word-break: break-all;
}

.btn-copy {
    padding: 8px 12px;
    background-color: var(--bg-primary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 13px;
    cursor: pointer;
    white-space: nowrap;
    transition: all 150ms;
}

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

.btn-copy.copied {
    color: var(--success);
    border-color: var(--success);
}

/* Footer */
footer {
    border-top: 1px solid var(--border);
    padding: 24px 0;
    text-align: center;
    color: var(--text-tertiary);
    font-size: 13px;
    margin-top: auto;
}

/* Utilities */
[hidden] {
    display: none !important;
}

/* Responsive */
@media (max-width: 640px) {
    .header-inner {
        padding: 0 16px;
    }

    .content {
        padding: 0 16px;
    }

    header h1 {
        font-size: 16px;
    }

    .upload-container {
        padding: 32px 16px;
    }

    .upload-content h2 {
        font-size: 20px;
    }

    main {
        padding: 32px 0;
    }
}

/* Hide ads on smaller screens */
@media (max-width: 1200px) {
    .ad-left, .ad-right {
        display: none;
    }
    
    .content {
        justify-content: center;
    }
}