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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --success: #16a34a;
    --warning: #ca8a04;
    --error: #dc2626;
    --bg: #f8fafc;
    --card: #ffffff;
    --border: #e2e8f0;
    --text: #1e293b;
    --text-muted: #64748b;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

.container { max-width: 900px; margin: 0 auto; padding: 2rem; }

header { text-align: center; margin-bottom: 2rem; }
header h1 { font-size: 1.75rem; font-weight: 600; margin-bottom: 0.5rem; }
header p { color: var(--text-muted); }

.tabs {
    display: flex; gap: 0.5rem; margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--border); padding-bottom: 0.5rem;
}

.tab {
    padding: 0.75rem 1.5rem; border: none; background: none;
    font-size: 1rem; cursor: pointer; border-radius: 0.5rem 0.5rem 0 0;
    color: var(--text-muted); transition: all 0.2s;
}

.tab:hover { background: var(--border); }
.tab.active { background: var(--primary); color: white; }

.tab-content {
    display: none; background: var(--card); border-radius: 0.75rem;
    padding: 2rem; box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.tab-content.active { display: block; }

.upload-zone {
    border: 2px dashed var(--border); border-radius: 0.75rem;
    padding: 3rem; text-align: center; transition: all 0.2s; cursor: pointer;
}
.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--primary); background: #eff6ff;
}
.upload-zone input { display: none; }
.upload-zone h3 { margin-bottom: 0.5rem; }
.upload-zone p { color: var(--text-muted); font-size: 0.875rem; }

.file-info {
    margin-top: 1rem; padding: 1rem; background: #f0fdf4;
    border-radius: 0.5rem; display: none;
}
.file-info.visible { display: block; }

.btn {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.75rem 1.5rem; border: none; border-radius: 0.5rem;
    font-size: 1rem; cursor: pointer; transition: all 0.2s;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-primary:disabled { background: var(--border); cursor: not-allowed; }

.actions { margin-top: 1.5rem; display: flex; gap: 1rem; }

.status {
    padding: 1rem; border-radius: 0.5rem; margin-top: 1rem; display: none;
}
.status.visible { display: block; }
.status.success { background: #f0fdf4; color: var(--success); }
.status.error { background: #fef2f2; color: var(--error); }
.status.loading { background: #eff6ff; color: var(--primary); }

.info-box {
    background: #eff6ff; border-left: 4px solid var(--primary);
    padding: 1rem; margin-bottom: 1.5rem; border-radius: 0 0.5rem 0.5rem 0;
}
.info-box h4 { margin-bottom: 0.25rem; }
.info-box p { color: var(--text-muted); font-size: 0.875rem; }

.result { margin-top: 1.5rem; padding: 1rem; background: var(--bg); border-radius: 0.5rem; display: none; }
.result.visible { display: block; }
.result h4 { margin-bottom: 0.75rem; }

.dropdown-item {
    padding: 0.75rem; background: white; border: 1px solid var(--border);
    border-radius: 0.5rem; margin-bottom: 0.5rem;
}
.dropdown-item strong { color: var(--primary); }

.field-group { margin-bottom: 1rem; }
.field-group h5 { margin-bottom: 0.5rem; color: var(--text-muted); }
.field-list { display: grid; gap: 0.5rem; }

footer { text-align: center; margin-top: 3rem; color: var(--text-muted); font-size: 0.875rem; }

.template-list { margin-bottom: 2rem; }
.template-list h4 { margin-bottom: 1rem; }
.template-item {
    display: flex; justify-content: space-between; align-items: center;
    padding: 1rem; background: white; border: 1px solid var(--border);
    border-radius: 0.5rem; margin-bottom: 0.5rem;
}
.template-item .name { font-weight: 500; }
.template-item .size { color: var(--text-muted); font-size: 0.875rem; }
.template-upload h4 { margin-bottom: 1rem; }
.upload-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.upload-zone.small { padding: 1.5rem; }
.upload-zone.small h3 { font-size: 1rem; }
