/* Light Mode Sur-mesure */
:root[data-theme="light"] {
    --c-bg: #f4f6f8;
    --c-surface: #ffffff;
    --c-surface2: #e9ecef;
    --c-border: rgba(0, 0, 0, 0.1);
    --c-text: #1a1d20;
    --c-text-muted: #6c757d;
}
:root[data-theme="light"] .site-header {
    background: #ffffff;
}
:root[data-theme="light"] .brand-name {
    background: linear-gradient(90deg, #1a1d20 0%, var(--c-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
:root[data-theme="light"] .status-value,
:root[data-theme="light"] .modal-card h2 {
    color: var(--c-text);
}
:root[data-theme="light"] .status-chip {
    background: rgba(0, 0, 0, 0.05);
}
:root[data-theme="light"] .modal {
    background: rgba(255, 255, 255, 0.85);
}
:root[data-theme="light"] .form-group input,
:root[data-theme="light"] select.ctrl-input {
    color: var(--c-text);
    background-color: var(--c-surface);
}
:root[data-theme="light"] .btn-ghost:hover {
    background: var(--c-surface2);
    border-color: rgba(0, 0, 0, 0.2);
    color: var(--c-text);
}

.theme-toggle-btn {
    background: transparent;
    border: 1px solid var(--c-border);
    color: var(--c-text);
    border-radius: var(--radius-pill);
    padding: var(--space-1) var(--space-3);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8125rem;
    font-weight: 500;
    transition: background var(--transition);
    font-family: var(--font-sans);
}
.theme-toggle-btn:hover {
    background: var(--c-surface2);
}