:root {
    --is-red: #e03a2f;
    --is-red-dark: #c4322a;
    --is-black: #1a1a1a;
    --is-sidebar-bg: #1a1a1a;
    --is-sidebar-width: 240px;
    --is-topbar-height: 56px;
    --is-body-bg: #f4f5f7;
    --is-card-bg: #ffffff;
    --is-text-muted: #6b7280;
    --is-border: #e5e7eb;
}

/* ── Reset / base ── */
body.admin-body {
    font-family: 'Nunito', sans-serif;
    background-color: var(--is-body-bg);
    margin: 0;
    padding: 0;
}

/* ── Sidebar ── */
.admin-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--is-sidebar-width);
    height: 100vh;
    background-color: var(--is-sidebar-bg);
    display: flex;
    flex-direction: column;
    z-index: 100;
    overflow-y: auto;
}

.admin-sidebar__brand {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.admin-sidebar__brand img {
    height: 32px;
}

.admin-sidebar__brand-label {
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    opacity: 0.5;
    line-height: 1;
}

.admin-sidebar__nav {
    padding: 1rem 0;
    flex: 1;
}

.admin-nav-section {
    padding: 0.5rem 1.5rem 0.25rem;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(255,255,255,0.3);
}

.admin-nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 1.5rem;
    color: rgba(255,255,255,0.65);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    border-left: 3px solid transparent;
    transition: color 0.15s, background-color 0.15s, border-color 0.15s;
}

.admin-nav-link:hover {
    color: #fff;
    background-color: rgba(255,255,255,0.05);
}

.admin-nav-link.active {
    color: #fff;
    border-left-color: var(--is-red);
    background-color: rgba(224,58,47,0.12);
}

.admin-sidebar__footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid rgba(255,255,255,0.08);
    font-size: 0.8rem;
    color: rgba(255,255,255,0.35);
}

/* ── Main area ── */
.admin-main {
    margin-left: var(--is-sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ── Top bar ── */
.admin-topbar {
    height: var(--is-topbar-height);
    background-color: var(--is-card-bg);
    border-bottom: 1px solid var(--is-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.75rem;
    position: sticky;
    top: 0;
    z-index: 50;
}

.admin-topbar__title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--is-black);
    margin: 0;
}

.admin-topbar__user {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--is-text-muted);
}

.admin-topbar__avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--is-red);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
}

/* ── Content ── */
.admin-content {
    padding: 1.75rem;
    flex: 1;
}

/* ── Cards ── */
.admin-card {
    background-color: var(--is-card-bg);
    border: 1px solid var(--is-border);
    border-radius: 8px;
    padding: 1.5rem;
}

.admin-card__title {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--is-text-muted);
    margin-bottom: 0.5rem;
}

.admin-card__value {
    font-size: 2rem;
    font-weight: 900;
    color: var(--is-black);
    line-height: 1;
}

.admin-card__value--accent {
    color: var(--is-red);
}

/* ── Stat grid ── */
.admin-stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 1.75rem;
}

/* ── Buttons ── */
.btn-admin-primary {
    background-color: var(--is-red);
    color: #fff;
    border: none;
    font-weight: 700;
    font-family: inherit;
    border-radius: 6px;
    padding: 0.45rem 1rem;
    font-size: 0.875rem;
}

.btn-admin-primary:hover {
    background-color: var(--is-red-dark);
    color: #fff;
}

/* ── Logout link ── */
.admin-logout-btn {
    background: none;
    border: none;
    padding: 0;
    color: rgba(255,255,255,0.65);
    font-size: 0.9rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    text-align: left;
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 1.5rem;
    border-left: 3px solid transparent;
    transition: color 0.15s;
}

.admin-logout-btn:hover {
    color: #fff;
}