:root {
    --color-bg: #f4f6f9;
    --color-card: #ffffff;
    --color-primary: #2563eb;
    --color-primary-dark: #1e40af;
    --color-danger: #dc2626;
    --color-text: #1f2937;
    --color-muted: #6b7280;
    --color-border: #e5e7eb;
    --radius: 10px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    display: flex;
    justify-content: center;
    padding: 40px 16px;
}

.card {
    background: var(--color-card);
    border-radius: var(--radius);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
    padding: 32px;
    width: 100%;
    max-width: 720px;
}

.login-page {
    align-items: center;
}

.login-card {
    max-width: 360px;
}

h1 {
    margin: 0 0 20px;
    font-size: 22px;
}

.header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.link-muted {
    color: var(--color-muted);
    text-decoration: none;
    font-size: 14px;
}

.link-muted:hover {
    color: var(--color-primary);
}

input[type="text"],
input[type="password"],
input[type="file"],
textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    margin-bottom: 12px;
}

textarea {
    resize: vertical;
}

label {
    display: block;
    font-size: 13px;
    color: var(--color-muted);
    margin-bottom: 6px;
}

button {
    background: var(--color-primary);
    color: #fff;
    border: none;
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.15s ease;
}

button:hover {
    background: var(--color-primary-dark);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 24px;
}

th, td {
    text-align: left;
    padding: 10px 8px;
    border-bottom: 1px solid var(--color-border);
    font-size: 14px;
}

th {
    color: var(--color-muted);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.actions-cell {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.inline-form {
    display: inline;
}

.btn {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 13px;
    text-decoration: none;
    border: none;
    cursor: pointer;
}

.btn-download {
    background: var(--color-primary);
    color: #fff;
}

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

.btn-delete {
    background: #fef2f2;
    color: var(--color-danger);
}

.btn-delete:hover {
    background: #fee2e2;
}

.empty-state {
    color: var(--color-muted);
    text-align: center;
    padding: 24px 0;
}

.flash {
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 14px;
    margin-bottom: 16px;
}

.flash-success {
    background: #ecfdf5;
    color: #047857;
}

.flash-error {
    background: #fef2f2;
    color: var(--color-danger);
}

.add-section {
    margin-top: 16px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 12px 16px;
}

.add-section summary {
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
}

.add-section form {
    margin-top: 12px;
}