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

:root {
    --background: 0 0% 8%;
    --foreground: 0 0% 95%;
    --card: 0 0% 12%;
    --card-foreground: 0 0% 95%;
    --primary: 0 0% 100%;
    --primary-foreground: 0 0% 100%;
    --secondary: 0 0% 15%;
    --secondary-foreground: 0 0% 90%;
    --muted: 0 0% 30%;
    --muted-foreground: 0 0% 65%;
    --accent: 0 0% 20%;
    --accent-foreground: 0 0% 100%;
    --border: 0 0% 30%;
    --input: 0 0% 15%;
    --ring: 220 80% 60%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: hsl(var(--background));
    color: hsl(var(--foreground));
    line-height: 1.5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

header {
    margin-bottom: 40px;
}

.header-top {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.logo {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: hsl(var(--primary));
    color: hsl(var(--primary-foreground));
    border-radius: 8px;
    font-size: 24px;
    font-weight: 700;
    flex-shrink: 0;
}

.logo img {
    width: 100%;
    height: 100%;
    border-radius: 8px;
    object-fit: cover;
}

.brand-name {
    font-size: 18px;
    font-weight: 600;
    color: hsl(var(--foreground));
}

.main-nav {
    margin-bottom: 24px;
}

.main-nav ul {
    display: flex;
    gap: 24px;
    list-style: none;
}

.main-nav a {
    text-decoration: none;
    color: hsl(var(--muted-foreground));
    font-size: 16px;
    font-weight: 500;
    transition: color 0.2s;
}

.main-nav a:hover {
    color: hsl(var(--foreground));
}

.main-nav a.active {
    color: hsl(var(--foreground));
    border-bottom: 2px solid hsl(var(--primary));
    padding-bottom: 4px;
}

h1 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 8px;
}

.subtitle {
    color: hsl(var(--muted-foreground));
    font-size: 14px;
}

.content-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.form-section, .output-section {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

label {
    font-size: 14px;
    font-weight: 500;
}

input[type="text"],
input[type="file"],
textarea {
    padding: 10px 12px;
    border: 1px solid hsl(var(--border));
    border-radius: 6px;
    font-family: inherit;
    font-size: 14px;
    background: hsl(var(--input));
    color: hsl(var(--foreground));
    transition: all 0.2s;
}

input[type="text"]:focus,
input[type="file"]:focus,
textarea:focus {
    outline: none;
    border-color: hsl(var(--ring));
    box-shadow: 0 0 0 3px hsl(var(--ring) / 0.1);
}

textarea {
    resize: vertical;
    min-height: 80px;
}

.image-preview-container {
    position: relative;
    width: 200px;
    height: 200px;
    border: 2px dashed hsl(var(--border));
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: hsl(var(--secondary));
    cursor: pointer;
    transition: all 0.2s;
    overflow: hidden;
}

.image-preview-container:hover {
    border-color: hsl(var(--primary));
}

.image-preview-container.drag-over {
    border-color: hsl(var(--primary));
    background: hsl(var(--primary) / 0.05);
}

.image-preview {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: none;
}

.image-preview.show {
    display: block;
}

.placeholder-text {
    text-align: center;
    color: hsl(var(--muted-foreground));
    font-size: 13px;
    pointer-events: none;
}

.button {
    padding: 10px 16px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.button-primary {
    background: hsl(var(--primary));
    color: hsl(0 0% 10%);
}

.button-primary:hover {
    background: hsl(var(--primary) / 0.9);
}

.button-secondary {
    background: hsl(var(--secondary));
    color: hsl(var(--secondary-foreground));
    border: 1px solid hsl(var(--border));
}

.button-secondary:hover {
    background: hsl(var(--secondary) / 0.8);
}

.button-small {
    padding: 6px 10px;
    font-size: 12px;
}

.output-card {
    border: 1px solid hsl(var(--border));
    border-radius: 6px;
    padding: 16px;
    background: hsl(var(--card));
}

.output-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.output-label {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: hsl(var(--muted-foreground));
}

.output-content {
    font-size: 14px;
    line-height: 1.6;
    word-break: break-word;
    color: hsl(var(--card-foreground));
    min-height: 40px;
    display: flex;
    align-items: flex-start;
    white-space: pre-wrap;
}

.output-content.empty {
    color: hsl(var(--muted-foreground));
    font-style: italic;
    align-items: center;
}

.feedback-message {
    font-size: 12px;
    color: hsl(var(--muted-foreground));
    margin-top: 4px;
    display: none;
}

.feedback-message.show {
    display: block;
    color: hsl(var(--accent-foreground));
    background: hsl(var(--accent));
    padding: 8px 12px;
    border-radius: 4px;
}

.generate-button {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    margin-top: 20px;
}

.loading {
    display: none;
    text-align: center;
    color: hsl(var(--muted-foreground));
    font-size: 14px;
}

.loading.show {
    display: block;
}

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid hsl(var(--border));
    border-top-color: hsl(var(--primary));
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.copy-all-section {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 2px solid hsl(var(--border));
}

.drag-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: hsl(var(--primary) / 0.1);
    border: 2px dashed hsl(var(--primary));
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 600;
    color: hsl(var(--primary));
    z-index: 1000;
    pointer-events: none;
}

.drag-overlay.show {
    display: flex;
}

@media (max-width: 768px) {
    .content-wrapper {
        grid-template-columns: 1fr;
    }

    .image-preview-container {
        width: 150px;
        height: 150px;
    }
}