/* Windows 11 inspired theme variables */
:root {
    --bg: #f6f7fb;
    --text: #0b1220;
    --muted: #6b7280;
    --card-bg: #ffffff;
    --card-border: #e5e7eb;
    --card-hover: #0b1220;
    --accent: #0ea5e9;
    --glass-bg: rgba(255, 255, 255, .2);
    --glass-border: rgba(255, 255, 255, .35);
    --glass-shadow: 0 18px 60px rgba(0, 0, 0, .18);
}

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

body {
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    min-height: 100vh;
    overflow: hidden;
}

/* Desktop background */
.desktop {
    position: fixed;
    inset: 0;
    z-index: 0;
    background-image: url("https://t.alcy.cc/moe");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    filter: saturate(1.05);
}

/* Back-to-home button */
.top-links {
    position: fixed;
    top: 10px;
    right: 10px;
    display: flex;
    gap: 8px;
    z-index: 1000;
}

.top-link {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    background: var(--glass-bg);
    color: var(--text);
    text-decoration: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, .06);
    backdrop-filter: saturate(1.8) blur(22px);
    -webkit-backdrop-filter: saturate(1.8) blur(22px);
    transition: border-color .15s ease, transform .15s ease;
}

.top-link:hover {
    border-color: var(--card-hover);
    transform: translateY(-1px);
}

/* Tool window */
.tool-window {
    position: fixed;
    z-index: 500;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 90vw;
    max-width: 900px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    background: var(--glass-bg);
    box-shadow: var(--glass-shadow), inset 0 0 0 1px rgba(255, 255, 255, .25);
    overflow: hidden;
    backdrop-filter: saturate(1.8) blur(22px);
    -webkit-backdrop-filter: saturate(1.8) blur(22px);
}

/* Window title bar */
.window-titlebar {
    height: 40px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 12px;
    background: var(--glass-bg);
    border-bottom: 1px solid var(--glass-border);
    user-select: none;
    backdrop-filter: saturate(1.8) blur(22px);
    -webkit-backdrop-filter: saturate(1.8) blur(22px);
}

.window-title {
    font-size: 13px;
    color: var(--muted);
    font-weight: 500;
    text-shadow: 0 1px 2px rgba(0, 0, 0, .25);
}

/* Window content */
.window-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 20px;
    background: transparent;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

.subtitle {
    color: var(--muted);
    text-align: center;
    margin-bottom: 24px;
    font-size: 14px;
}

/* Configuration section */
.config-section {
    margin-bottom: 20px;
    padding: 16px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    backdrop-filter: saturate(1.8) blur(22px);
    -webkit-backdrop-filter: saturate(1.8) blur(22px);
}


.config-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 15px;
    align-items: end;
}

.config-group {
    display: flex;
    flex-direction: column;
}

.input-hint {
    font-size: 11px;
    color: var(--muted);
    margin-top: 4px;
    opacity: 0.8;
}

label {
    font-size: 12px;
    font-weight: 500;
    color: var(--muted);
    margin-bottom: 6px;
}

input[type="number"],
input[type="text"] {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--card-border);
    border-radius: 6px;
    font-size: 14px;
    background: white;
    transition: border-color 0.15s ease;
}

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

.preview {
    padding: 8px 12px;
    background: #f8f9fa;
    border: 1px solid var(--card-border);
    border-radius: 6px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
}

/* Upload area */
.upload-area {
    background: var(--glass-bg);
    border: 2px dashed var(--glass-border);
    border-radius: 12px;
    padding: 60px 20px;
    text-align: center;
    transition: all 0.3s ease;
    margin-bottom: 20px;
    backdrop-filter: saturate(1.8) blur(22px);
    -webkit-backdrop-filter: saturate(1.8) blur(22px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, .08);
}

.upload-area:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, .12);
    border-color: var(--accent);
}

.upload-area.dragover {
    background: rgba(14, 165, 233, .1);
    border-color: var(--accent);
}

.upload-area input[type="file"] {
    display: none;
}

.upload-area label {
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.upload-area svg {
    color: var(--accent);
}

.upload-area span {
    color: var(--muted);
    font-size: 14px;
}

/* File list */
.file-list {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    backdrop-filter: saturate(1.8) blur(22px);
    -webkit-backdrop-filter: saturate(1.8) blur(22px);
}

.file-list h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 15px;
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
    border-radius: 6px;
    margin-bottom: 6px;
    backdrop-filter: saturate(1.8) blur(22px);
    -webkit-backdrop-filter: saturate(1.8) blur(22px);
}

.file-info {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
}

.file-original {
    color: var(--text);
    font-weight: 500;
}

.arrow {
    color: var(--muted);
    font-weight: 600;
}

.file-renamed {
    color: var(--accent);
    font-weight: 500;
}

.remove-btn {
    padding: 6px 10px;
    border: 1px solid rgba(239, 68, 68, .3);
    border-radius: 4px;
    background: rgba(239, 68, 68, .1);
    color: #dc2626;
    cursor: pointer;
    font-size: 11px;
    font-weight: 500;
    transition: all .15s ease;
    backdrop-filter: saturate(1.8) blur(22px);
    -webkit-backdrop-filter: saturate(1.8) blur(22px);
}

.remove-btn:hover {
    background: #dc2626;
    color: white;
    border-color: #dc2626;
}

/* Action buttons */
.actions {
    display: flex;
    gap: 12px;
    margin: 20px 0;
}

.btn {
    flex: 1;
    padding: 12px 20px;
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    background: var(--glass-bg);
    color: var(--text);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all .15s ease;
    backdrop-filter: saturate(1.8) blur(22px);
    -webkit-backdrop-filter: saturate(1.8) blur(22px);
}

.btn:hover {
    border-color: var(--card-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, .1);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent) 0%, #06b6d4 100%);
    border: none;
    color: white;
}

.btn-secondary {
    background: rgba(239, 68, 68, .1);
    border-color: rgba(239, 68, 68, .3);
    color: #dc2626;
}

.btn-secondary:hover {
    background: #dc2626;
    color: white;
    border-color: #dc2626;
}

.btn svg {
    flex-shrink: 0;
}

.hidden {
    display: none;
}

/* Responsive design */
@media (max-width: 768px) {
    .tool-window {
        width: 95%;
        max-height: 95vh;
    }
    
    .config-row {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .window-content {
        padding: 15px;
    }
    
    .upload-area {
        padding: 30px 15px;
    }
}