/* Core layout styles for Billing Dashboard */
html,
body,
#app {
    height: 100%;
    margin: 0;
}

body {
    background: #f5f7fa;
    font-family: Roboto, 'Helvetica Neue', Arial, sans-serif;
}

.app-shell {
    height: 100%;
}

/* Side Navigation */
.app-sidenav {
    position: fixed;
    margin-top: 0px;
    top: 0;
    left: 0;
    width: 250px;
    height: 100vh;
    background: #1565c0;
    overflow-y: auto;
    padding-top: 8px;
    box-shadow: 2px 0 6px rgba(0, 0, 0, 0.12);
    transition: width 0.3s ease, transform 0.3s ease;
    z-index: 100;
}

/* Collapsed sidebar */
.app-sidenav.collapsed {
    width: 60px;
}

.app-sidenav .sidenav-header {
    padding: 12px 18px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
}

.app-sidenav.collapsed .sidenav-header {
    padding: 12px 8px 16px;
    flex-direction: column;
    align-items: center;
}

.app-sidenav .sidenav-header .header-content {
    flex: 1;
    min-width: 0;
}

.app-sidenav .sidenav-header .sidenav-controls {
    display: flex;
    gap: 4px;
    margin-left: 8px;
}

.app-sidenav.collapsed .sidenav-controls {
    margin-left: 0;
    margin-top: 8px;
}

.collapse-btn {
    background: rgba(255, 255, 255, 0.15);
    border: none;
    color: #fff;
    padding: 4px;
    border-radius: 3px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    transition: background 0.2s;
}

.collapse-btn:hover {
    background: rgba(255, 255, 255, 0.25);
}

.collapse-btn i {
    font-size: 16px;
}

.app-sidenav .sidenav-header .brand-text {
    font-size: 20px;
    font-weight: 600;
    color: #fff;
    display: block;
    margin-bottom: 4px;
    letter-spacing: .5px;
    transition: font-size 0.3s ease;
}

.app-sidenav.collapsed .brand-text {
    font-size: 16px;
    text-align: center;
}

.app-sidenav .sidenav-header small {
    display: block;
    color: #e3f2fd;
    font-size: 12px;
}

.app-sidenav a {
    color: #e3f2fd;
    display: flex;
    align-items: center;
    padding: 10px 18px;
    font-weight: 500;
    font-size: 14px;
    transition: background .18s, padding 0.3s ease;
    white-space: nowrap;
    overflow: hidden;
}

.app-sidenav.collapsed a {
    padding: 10px 8px;
    justify-content: center;
}

.app-sidenav a i.material-icons {
    margin-right: 14px;
    font-size: 20px;
    transition: margin 0.3s ease;
}

.app-sidenav.collapsed a i.material-icons {
    margin-right: 0;
}

.app-sidenav a span {
    transition: opacity 0.3s ease;
}

.app-sidenav.collapsed a span {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

.app-sidenav a.router-link-active {
    background: rgba(255, 255, 255, 0.18);
}

.app-sidenav a:hover {
    background: rgba(255, 255, 255, 0.12);
}

/* Tooltip for collapsed sidebar */
.app-sidenav.collapsed a {
    position: relative;
}

.app-sidenav.collapsed a:hover::after {
    content: attr(title);
    position: absolute;
    left: 60px;
    top: 50%;
    transform: translateY(-50%);
    background: #333;
    color: #fff;
    padding: 6px 10px;
    border-radius: 4px;
    font-size: 12px;
    white-space: nowrap;
    z-index: 1000;
    pointer-events: none;
}

.logout-block {
    margin-top: 16px;
    padding: 0 16px 20px;
}

.app-sidenav.collapsed .logout-block {
    padding: 0 8px 20px;
}

.logout-btn {
    background: rgba(255, 255, 255, 0.15);
    border: none;
    color: #fff;
    padding: 8px 14px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
    letter-spacing: .5px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    transition: padding 0.3s ease;
}

.app-sidenav.collapsed .logout-btn {
    padding: 8px 4px;
}

.logout-btn i {
    font-size: 18px;
    margin-right: 6px;
    transition: margin 0.3s ease;
}

.app-sidenav.collapsed .logout-btn i {
    margin-right: 0;
}

.logout-btn:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* Main area */
.app-main {
    margin-left: 250px;
    height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin-left 0.3s ease;
}

/* Adjust main area when sidebar is collapsed */
.app-shell.sidebar-collapsed .app-main {
    margin-left: 60px;
}

.app-header {
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 22px;
    background: #1976d2;
    color: #fff;
    position: sticky;
    top: 0;
    z-index: 60;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.app-header .brand-title {
    font-size: 18px;
    font-weight: 500;
    letter-spacing: .5px;
}

.app-header .user-info {
    margin-right: 16px;
    font-size: 14px;
    opacity: .9;
}

.menu-toggle {
    display: none;
    margin-right: 16px;
    cursor: pointer;
    color: #fff;
}

.menu-toggle i {
    font-size: 26px;
}

.app-content {
    flex: 1;
    overflow-y: auto;
    padding: 20px 28px 40px;
}

/* Scrollbar tweaks (webkit) */
.app-content::-webkit-scrollbar {
    width: 10px;
}

.app-content::-webkit-scrollbar-track {
    background: transparent;
}

.app-content::-webkit-scrollbar-thumb {
    background: #c7d2e2;
    border-radius: 6px;
}

.app-content::-webkit-scrollbar-thumb:hover {
    background: #b2c1d4;
}

/* Cards refinement */
.card {
    border-radius: 8px;
}

.card .card-title {
    font-size: 18px;
}

/* Responsive */
@media (max-width: 992px) {
    .app-sidenav {
        transform: translateX(-100%);
        transition: transform .25s ease;
        width: 240px;
        z-index: 200;
    }

    .app-sidenav.open {
        transform: translateX(0);
    }

    .app-sidenav.collapsed {
        width: 240px; /* Full width on mobile even when collapsed */
    }

    .app-main {
        margin-left: 0;
    }

    .app-shell.sidebar-collapsed .app-main {
        margin-left: 0; /* No margin adjustment on mobile */
    }

    .menu-toggle {
        display: inline-flex;
    }

    body.menu-open {
        overflow: hidden;
    }

    /* Hide collapse control on mobile */
    .collapse-btn {
        display: none;
    }
}

/* Utility */
.text-truncate {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Login state wrapper */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}