/* =========================================================
   ADMIN CORE / SHELL
   Sidebar + Topbar + Layout + Global UI
   ========================================================= */

:root {
    --bg: #0b1020;
    --sidebar-bg: #0e1526;
    --panel: #11182a;
    --panel-2: #171f33;
    --border: #26324a;
    --text: #eef2ff;
    --muted: #8d9ab3;
    --muted-2: #65738d;
    --accent: #6366f1;
    --accent-2: #8b5cf6;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --sidebar-width: 260px;
    --topbar-height: 76px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
    width: 100%;
    background: var(--bg);
}

body {
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 14px;
    line-height: 1.5;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
input,
textarea,
select {
    font: inherit;
}

/* APP */
.admin-app {
    min-height: 100vh;
    width: 100%;
    background: var(--bg);
}

/* SIDEBAR */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    z-index: 1100;
    overflow: hidden;
}

.sidebar-header {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
    padding: 0 16px;
    border-bottom: 1px solid rgba(255,255,255,.05);
    background: var(--sidebar-bg);
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.brand-logo {
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    flex-shrink: 0;
    border-radius: 11px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #fff;
    font-size: 11px;
    font-weight: 800;
    box-shadow: 0 8px 24px rgba(99,102,241,.24);
}

.brand-text strong {
    display: block;
    color: #f8fafc;
    font-size: 14px;
    font-weight: 700;
    white-space: nowrap;
}

.brand-text span {
    display: block;
    margin-top: 1px;
    color: var(--muted);
    font-size: 10px;
}

.sidebar-close {
    display: none;
    width: 30px;
    height: 30px;
    padding: 0;
    border: 1px solid rgba(255,255,255,.07);
    border-radius: 8px;
    background: #151d30;
    color: #94a3b8;
    cursor: pointer;
}

.sidebar-scroll {
    flex: 1;
    overflow-y: auto;
    padding: 14px 12px;
    background: var(--sidebar-bg);
}

.sidebar-scroll::-webkit-scrollbar {
    width: 4px;
}

.sidebar-scroll::-webkit-scrollbar-thumb {
    background: #263247;
    border-radius: 10px;
}

.nav-section {
    margin-bottom: 20px;
}

.nav-section-title {
    display: block;
    padding: 0 10px;
    margin-bottom: 6px;
    color: var(--muted-2);
    font-size: 9px;
    font-weight: 700;
    letter-spacing: .09em;
    text-transform: uppercase;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 11px;
    min-height: 40px;
    padding: 9px 11px;
    border-radius: 9px;
    color: #aeb8ce;
    background: transparent;
    font-size: 12px;
    font-weight: 500;
    transition: background .15s ease, color .15s ease;
}

.nav-item:hover {
    background: #182139;
    color: #fff;
}

.nav-item.active {
    background: linear-gradient(90deg, rgba(99,102,241,.17), rgba(99,102,241,.07));
    color: #fff;
}

.nav-icon {
    width: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: #8290aa;
    font-size: 13px;
}

.nav-item.active .nav-icon {
    color: #a9adff;
}

.sidebar-footer {
    flex-shrink: 0;
    padding: 13px 14px;
    border-top: 1px solid rgba(255,255,255,.05);
    background: var(--sidebar-bg);
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-avatar,
.topbar-avatar {
    width: 36px;
    height: 36px;
    display: grid;
    place-items: center;
    flex-shrink: 0;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #fff;
    font-size: 11px;
    font-weight: 800;
}

.sidebar-user-info {
    min-width: 0;
}

.sidebar-user-info strong {
    display: block;
    color: #f8fafc;
    font-size: 11px;
}

.sidebar-user-info span {
    display: block;
    max-width: 165px;
    margin-top: 1px;
    color: var(--muted);
    font-size: 9px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* MAIN */
.main-wrapper {
    min-height: 100vh;
    width: calc(100% - var(--sidebar-width));
    margin-left: var(--sidebar-width);
    background: var(--bg);
}

/* TOPBAR */
.topbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    background: rgba(11,16,32,.96);
    border-bottom: 1px solid rgba(255,255,255,.06);
    backdrop-filter: blur(14px);
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 0;
    flex: 1 1 auto;
}

.menu-toggle {
    display: none;
    width: 38px;
    height: 38px;
    align-items: center;
    justify-content: center;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: 9px;
    background: #131b2c;
    color: #aeb8ce;
    cursor: pointer;
}

.page-heading h1 {
    margin: 0;
    color: #f8fafc;
    font-size: 19px;
    font-weight: 700;
    letter-spacing: -.2px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 5px;
    margin-top: 3px;
    color: #66758e;
    font-size: 9px;
}

.breadcrumb a {
    color: #7786a1;
}

.breadcrumb a:hover {
    color: #a5b4fc;
}

.topbar-right {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 12px;
    margin-left: auto;
    flex: 0 0 auto;
}

.topbar-button {
    min-height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 12px;
    border: 1px solid var(--border);
    border-radius: 9px;
    background: #121a2b;
    color: #aeb8ce;
    font-size: 10px;
    font-weight: 600;
}

.topbar-button:hover {
    background: #182139;
    color: #fff;
}

.topbar-user {
    display: flex;
    align-items: center;
    gap: 9px;
    padding-left: 12px;
    border-left: 1px solid rgba(255,255,255,.06);
}

.topbar-user-meta strong {
    display: block;
    color: #f8fafc;
    font-size: 10px;
}

.topbar-user-meta span {
    display: block;
    color: var(--muted);
    font-size: 9px;
}

.topbar-right form {
    display: inline-flex;
    width: auto;
    margin: 0;
    padding: 0;
    background: transparent;
    border: 0;
}

.logout-button {
    width: auto !important;
    min-width: 70px !important;
    height: 36px !important;
    min-height: 36px !important;
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    padding: 0 13px !important;
    border: 1px solid rgba(239,68,68,.22) !important;
    border-radius: 9px !important;
    background: rgba(239,68,68,.08) !important;
    color: #fca5a5 !important;
    font-size: 10px !important;
    font-weight: 600 !important;
    cursor: pointer;
}

.logout-button:hover {
    background: rgba(239,68,68,.15) !important;
}

/* CONTENT */
.admin-content {
    width: 100%;
    max-width: 1600px;
    margin: 0 auto;
    padding: 26px;
}

/* GLOBAL UI */
.card,
.admin-section,
.panel-card,
.stat-card {
    background: linear-gradient(180deg, #121a2d, #0f1728);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 10px 14px;
}

.grid2,
.admin-two-column {
    display: grid;
    grid-template-columns: minmax(360px,.85fr) minmax(520px,1.4fr);
    gap: 18px;
    align-items: start;
}

.admin-content form {
    display: grid;
    gap: 12px;
}

.admin-content label {
    display: grid;
    gap: 6px;
    color: #b9c3d7;
    font-size: 12px;
}

.admin-content input:not([type="checkbox"]):not([type="radio"]),
.admin-content textarea,
.admin-content select {
    width: 100%;
    min-height: 42px;
    padding: 10px 12px;
    background: #0b1220;
    border: 1px solid #2a3751;
    border-radius: 9px;
    color: #fff;
    outline: none;
    font-size: 12px;
}

.admin-content textarea {
    resize: vertical;
}

.admin-content input:focus,
.admin-content textarea:focus,
.admin-content select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(99,102,241,.12);
}

.admin-content button,
.admin-content .btn {
    width: auto;
    min-height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 14px;
    border: 0;
    border-radius: 9px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    cursor: pointer;
}

.admin-content table {
    width: 100%;
    border-collapse: collapse;
}

.admin-content th,
.admin-content td {
    padding: 12px;
    text-align: left;
    vertical-align: top;
    border-bottom: 1px solid #202b42;
}

.admin-content th {
    color: var(--muted);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: .06em;
}

.admin-content td {
    color: #d6deec;
    font-size: 12px;
}

.alert {
    padding: 12px 15px;
    margin-bottom: 18px;
    border-radius: 10px;
}

.alert-success {
    background: #0e3a31;
    border: 1px solid #1e695a;
    color: #a7f3d0;
}

.alert-danger {
    background: #44202a;
    border: 1px solid #7a3343;
    color: #fecaca;
}

.sidebar-overlay {
    display: none;
}

/* RESPONSIVE */
@media (max-width: 1000px) {
    .grid2,
    .admin-two-column {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 900px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform .2s ease;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-close {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .main-wrapper {
        width: 100%;
        margin-left: 0;
    }

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

    .sidebar-overlay {
        position: fixed;
        inset: 0;
        display: block;
        background: rgba(0,0,0,.55);
        opacity: 0;
        visibility: hidden;
        z-index: 1050;
        transition: .2s ease;
    }

    .sidebar-overlay.show {
        opacity: 1;
        visibility: visible;
    }
}

@media (max-width: 650px) {
    .topbar {
        padding: 0 14px;
    }

    .admin-content {
        padding: 16px 12px;
    }

    .topbar-button,
    .topbar-user-meta {
        display: none;
    }

    .logout-button {
        min-width: 38px !important;
        padding: 0 10px !important;
    }
}

/* =========================================================
   DASHBOARD STYLES
   Existing dashboard CSS preserved below
   ========================================================= */