/* AFIS application shell: fixed collapsible left sidebar + top bar.
   Structural rules only. Colors come from CSS variables that each theme
   file (theme_dark.css / theme_light.css / theme_elegant.css) overrides. */

:root {
    --sidebar-width: 264px;
    --topbar-height: 56px;
}

html, body {
    height: 100%;
}

/* ---- Sidebar ---- */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    background-color: var(--sidebar-bg, #1c1f2b);
    color: var(--sidebar-text, #f1f5f9);
    border-right: 1px solid var(--sidebar-border, rgba(255, 255, 255, 0.08));
    transform: translateX(0);
    transition: transform 0.25s ease;
    z-index: 1050;
    overflow: hidden;
}

body.sidebar-collapsed .sidebar {
    transform: translateX(calc(-1 * var(--sidebar-width)));
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    padding: 0.9rem 1rem;
    border-bottom: 1px solid var(--sidebar-border, rgba(255, 255, 255, 0.08));
    flex-shrink: 0;
}

.sidebar-brand img {
    height: 40px;
    width: auto;
    border-radius: 4px;
}

.sidebar-toggle {
    background: transparent;
    border: 1px solid var(--sidebar-border, rgba(255, 255, 255, 0.15));
    color: var(--sidebar-text, #f1f5f9);
    border-radius: 6px;
    width: 36px;
    height: 36px;
    line-height: 1;
    cursor: pointer;
    flex-shrink: 0;
}
.sidebar-toggle:hover {
    background-color: var(--sidebar-hover-bg, rgba(255, 255, 255, 0.08));
    color: var(--sidebar-hover-text, inherit);
}

.sidebar-nav {
    flex: 1 1 auto;
    overflow-y: auto;
    padding: 0.75rem 0.75rem 1rem 0.75rem;
}

.sidebar-section {
    margin-bottom: 1.1rem;
}

.sidebar-heading {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--sidebar-heading, #9aa3b3);
    padding: 0.35rem 0.6rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.45rem 0.6rem;
    border-radius: 8px;
    color: var(--sidebar-text, #f1f5f9);
    text-decoration: none;
    font-size: 0.92rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.sidebar-link i {
    width: 1.1rem;
    text-align: center;
    flex-shrink: 0;
    color: var(--sidebar-icon, var(--sidebar-heading, #9aa3b3));
}
.sidebar-link:hover {
    background-color: var(--sidebar-hover-bg, rgba(255, 255, 255, 0.08));
    color: var(--sidebar-hover-text, var(--sidebar-text, #f1f5f9));
    text-decoration: none;
}
.sidebar-link:hover i {
    color: inherit;
}

/* Emphasised entry (My Alerts) */
.sidebar-link-highlight {
    background-color: var(--sidebar-highlight-bg, rgba(129, 140, 248, 0.18));
    color: var(--sidebar-highlight-text, #ffffff);
    font-weight: 600;
    border: 1px solid var(--sidebar-highlight-border, transparent);
}
.sidebar-link-highlight i {
    color: inherit;
}
.sidebar-link-highlight:hover {
    background-color: var(--sidebar-highlight-hover-bg, var(--sidebar-highlight-bg, rgba(129, 140, 248, 0.3)));
    color: var(--sidebar-highlight-text, #ffffff);
}

/* Theme selector buttons */
.sidebar-theme-form {
    margin: 0;
}
.sidebar-theme-btn {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    width: 100%;
    text-align: left;
    background: transparent;
    border: none;
    padding: 0.45rem 0.6rem;
    border-radius: 8px;
    color: var(--sidebar-text, #f1f5f9);
    font-size: 0.92rem;
    cursor: pointer;
}
.sidebar-theme-btn i {
    width: 1.1rem;
    text-align: center;
    color: var(--sidebar-icon, var(--sidebar-heading, #9aa3b3));
}
.sidebar-theme-btn:hover {
    background-color: var(--sidebar-hover-bg, rgba(255, 255, 255, 0.08));
    color: var(--sidebar-hover-text, var(--sidebar-text, #f1f5f9));
}
.sidebar-theme-btn.active {
    background-color: var(--sidebar-active-bg, rgba(129, 140, 248, 0.25));
    color: var(--sidebar-active-text, #ffffff);
    font-weight: 600;
}
.sidebar-theme-btn.active i {
    color: inherit;
}

/* Sidebar footer: standalone logout / login */
.sidebar-footer {
    flex-shrink: 0;
    padding: 0.9rem;
    border-top: 1px solid var(--sidebar-border, rgba(255, 255, 255, 0.08));
}
.btn-sidebar-logout {
    display: block;
    width: 100%;
    text-align: center;
    background-color: #dc2626;
    border: 1px solid #dc2626;
    color: #ffffff !important;
    border-radius: 8px;
    padding: 0.5rem 0.75rem;
    font-weight: 600;
    font-size: 0.92rem;
    text-decoration: none;
    cursor: pointer;
}
.btn-sidebar-logout:hover {
    background-color: #b91c1c;
    border-color: #b91c1c;
    color: #ffffff;
    text-decoration: none;
}
.btn-sidebar-login {
    display: block;
    width: 100%;
    text-align: center;
    background-color: #16a34a;
    border: 1px solid #16a34a;
    color: #ffffff !important;
    border-radius: 8px;
    padding: 0.5rem 0.75rem;
    font-weight: 600;
    font-size: 0.92rem;
    text-decoration: none;
    cursor: pointer;
}
.btn-sidebar-login:hover {
    background-color: #15803d;
    border-color: #15803d;
    color: #ffffff;
    text-decoration: none;
}

/* ---- Main area ---- */
.main-wrapper {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin-left 0.25s ease;
}
body.sidebar-collapsed .main-wrapper {
    margin-left: 0;
}

.topbar {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0 1.25rem;
    background-color: var(--topbar-bg, #1c1f2b);
    color: var(--topbar-text, #f1f5f9);
    border-bottom: 1px solid var(--topbar-border, rgba(255, 255, 255, 0.08));
    position: sticky;
    top: 0;
    z-index: 1040;
}
.topbar .sidebar-toggle {
    border-color: var(--topbar-border, rgba(255, 255, 255, 0.15));
    color: var(--topbar-text, #f1f5f9);
}
.topbar-welcome {
    font-size: 0.92rem;
    color: var(--topbar-text, #f1f5f9);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.topbar-welcome strong {
    font-weight: 700;
}

.main-content {
    flex: 1 1 auto;
}

/* ---- Small screens: sidebar overlays content ---- */
@media (max-width: 991.98px) {
    .main-wrapper {
        margin-left: 0;
    }
    body:not(.sidebar-collapsed) .sidebar {
        box-shadow: 0 0 0 100vmax rgba(0, 0, 0, 0.45);
    }
}