:root {
    --sidebar-width: 260px;
    --sidebar-bg: #1a2233;
    --sidebar-bg-active: #2563eb;
    --sidebar-text: #aab4c8;
    --sidebar-text-active: #ffffff;
    --sidebar-heading: #5b6a85;

    --brand: #2563eb;
    --brand-dark: #1d4ed8;
    --brand-darker: #1e40af;
}

body {
    font-family: "Segoe UI", Tahoma, sans-serif;
}

.card {
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

/* ---- Tugmalar: zamonaviy, yumshoq ko'rinish ---- */
.btn {
    --bs-btn-border-radius: 0.55rem;
    --bs-btn-font-weight: 600;
    --bs-btn-padding-x: 1rem;
    --bs-btn-padding-y: 0.5rem;
    letter-spacing: 0.01em;
    box-shadow: 0 1px 2px rgba(16, 24, 40, 0.06);
    transition: transform 0.12s ease, box-shadow 0.12s ease, background-color 0.15s ease,
        border-color 0.15s ease, color 0.15s ease;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn:focus-visible {
    box-shadow: 0 0 0 0.2rem rgba(37, 99, 235, 0.25);
}

.btn-sm {
    --bs-btn-border-radius: 0.45rem;
    --bs-btn-font-weight: 600;
    letter-spacing: 0.01em;
}

.btn-primary {
    --bs-btn-bg: var(--brand);
    --bs-btn-border-color: var(--brand);
    --bs-btn-hover-bg: var(--brand-dark);
    --bs-btn-hover-border-color: var(--brand-dark);
    --bs-btn-active-bg: var(--brand-darker);
    --bs-btn-active-border-color: var(--brand-darker);
    --bs-btn-focus-shadow-rgb: 37, 99, 235;
    --bs-btn-disabled-bg: var(--brand);
    --bs-btn-disabled-border-color: var(--brand);
}

.btn-primary:hover {
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.28);
}

.btn-outline-primary {
    --bs-btn-color: var(--brand);
    --bs-btn-border-color: var(--brand);
    --bs-btn-hover-bg: var(--brand);
    --bs-btn-hover-border-color: var(--brand);
    --bs-btn-active-bg: var(--brand-dark);
    --bs-btn-active-border-color: var(--brand-dark);
    --bs-btn-focus-shadow-rgb: 37, 99, 235;
}

.btn-outline-primary:hover,
.btn-outline-success:hover,
.btn-outline-danger:hover,
.btn-outline-warning:hover,
.btn-outline-secondary:hover {
    box-shadow: 0 3px 8px rgba(16, 24, 40, 0.12);
}

.btn-success {
    --bs-btn-bg: #16a34a;
    --bs-btn-border-color: #16a34a;
    --bs-btn-hover-bg: #15803d;
    --bs-btn-hover-border-color: #15803d;
}

.btn-link {
    box-shadow: none;
    text-decoration: none;
}

.btn-link:hover {
    transform: none;
    text-decoration: underline;
}

.btn-close {
    box-shadow: none;
    transition: opacity 0.15s ease;
}

/* ---- App shell: sidebar + main ---- */
.app-shell {
    display: flex;
    min-height: 100vh;
}

.app-sidebar {
    width: var(--sidebar-width);
    flex-shrink: 0;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    overflow-y: auto;
    z-index: 1040;
    transition: transform 0.25s ease;
}

.app-sidebar .sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 1.1rem 1.25rem;
    color: #fff;
    font-weight: 600;
    font-size: 1.05rem;
    text-decoration: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.app-sidebar .sidebar-brand .bi {
    font-size: 1.4rem;
    color: var(--sidebar-bg-active);
}

.app-sidebar .sidebar-heading {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--sidebar-heading);
    padding: 1rem 1.25rem 0.35rem;
}

.app-sidebar .nav-link {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    color: var(--sidebar-text);
    padding: 0.55rem 1.25rem;
    font-size: 0.92rem;
    border-radius: 0;
    position: relative;
}

.app-sidebar .nav-link .bi {
    font-size: 1.05rem;
    width: 1.2rem;
    text-align: center;
}

.app-sidebar .nav-link:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.06);
}

.app-sidebar .nav-link.active {
    color: var(--sidebar-text-active);
    background: rgba(37, 99, 235, 0.18);
    font-weight: 600;
}

.app-sidebar .nav-link.active::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--sidebar-bg-active);
}

.app-sidebar .nav-link .badge {
    margin-left: auto;
}

.app-main {
    flex-grow: 1;
    min-width: 0;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
}

.app-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.65rem 1.25rem;
    background: #fff;
    border-bottom: 1px solid #e5e9f0;
    position: sticky;
    top: 0;
    z-index: 1020;
}

.app-topbar .sidebar-toggle {
    display: none;
    border: none;
    background: transparent;
    font-size: 1.4rem;
    line-height: 1;
    color: #333;
}

.app-content {
    padding: 1.5rem;
    flex-grow: 1;
}

.sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1030;
}

@media (max-width: 991.98px) {
    .app-sidebar {
        transform: translateX(-100%);
    }

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

    body.sidebar-open .sidebar-backdrop {
        display: block;
    }

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

    .app-topbar .sidebar-toggle {
        display: inline-flex;
        align-items: center;
    }
}