:root {
    --bg-color: #f8fafc;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --primary: #2d5d7b; /* Matched to your excel header color */
    --primary-hover: #1e4055;
    --border: #e2e8f0;
    --success: #10b981;
    --error: #ef4444;
    --card-bg: #ffffff;
}

body {
    font-family:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
        sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

.container {
    background-color: var(--card-bg);
    padding: 3rem;
    border-radius: 12px;
    box-shadow:
        0 4px 6px -1px rgba(0, 0, 0, 0.1),
        0 2px 4px -1px rgba(0, 0, 0, 0.06);
    width: 100%;
    max-width: 500px;
    text-align: center;
}

.header h1 {
    margin: 0 0 0.5rem 0;
    font-size: 1.5rem;
    color: var(--primary);
}

.header p {
    margin: 0 0 2rem 0;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.upload-area {
    border: 2px dashed var(--border);
    border-radius: 8px;
    padding: 3rem 1.5rem;
    transition: all 0.2s ease;
    background-color: #fdfdfd;
}

.upload-area.dragover {
    border-color: var(--primary);
    background-color: #f0f7fb;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.2s;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
}

.drag-text {
    margin-top: 1rem;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.status-container {
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    text-align: left;
}

.status-item {
    padding: 0.75rem 1rem;
    border-radius: 6px;
    font-size: 0.875rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--bg-color);
    border-left: 4px solid var(--border);
}

.status-item.pending {
    border-left-color: #f59e0b;
}
.status-item.success {
    border-left-color: var(--success);
    background-color: #ecfdf5;
}
.status-item.error {
    border-left-color: var(--error);
    background-color: #fef2f2;
}

.status-item span {
    font-weight: 500;
}

/* Update the existing status-item base style or append this */
.status-item {
    padding: 0; /* Changed to accommodate internal layouts */
    border-radius: 6px;
    font-size: 0.875rem;
    background-color: var(--bg-color);
    border-left: 4px solid var(--border);
    overflow: hidden;
    transition: max-height 0.3s ease;
    display: flex;
    flex-direction: column;
}

.status-summary {
    padding: 0.75rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: -webkit-fill-available;
    width: fill-available;
}

.status-item.error {
    cursor: pointer;
}

.status-item.error:hover {
    background-color: #fde8e8;
}

/* Hidden detail panel */
.status-details {
    max-height: 0;
    padding: 0 1rem;
    background-color: #f1f5f9;
    color: #475569;
    font-family: monospace;
    font-size: 0.8rem;
    white-space: pre-wrap;
    overflow: hidden;
    transition: all 0.2s ease-out;
    border-top: 0 solid transparent;
}

/* Expanded State */
.status-item.expanded .status-details {
    max-height: 200px;
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--border);
}