:root {
    /* Sidebar palette → ikinci fotodaki vibe: gece lacivertten mora */
    --side-grad-start: #0f172a; /* koyu lacivert */
    --side-grad-mid: #101c36; /* mavi ton */
    --side-grad-end: #3b1d5c; /* mor */
    --accent: #e6001a; /* Sparkassen kırmızısı */
    --accent-amber: #ffb822; /* sıcak vurgu */
    --surface: #f5f6fa; /* arka plan */
    --card: #ffffff; /* kart */
    --shadow: 0 8px 24px rgba(15, 23, 42, .08);
    --radius: 1rem;
    --side-w: 260px;
}

html, body {
    height: 100%
}

body {
    background: var(--surface)
}

/* Sidebar */
.sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--side-w);
    z-index: 1040;
    color: #e5e7eb;
    overflow-y: auto;
    background: radial-gradient(800px 300px at -20% -10%, rgba(255, 255, 255, .08), rgba(255, 255, 255, 0) 60%),
    linear-gradient(180deg, var(--side-grad-start) 0%, var(--side-grad-mid) 50%, var(--side-grad-end) 100%);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .03);
}

.brand {
    display: flex;
    align-items: center;
    gap: .65rem;
    padding: 1rem .9rem;
    background: linear-gradient(90deg, var(--accent), var(--accent-amber));
    color: #fff
}

.brand .logo {
    width: 36px;
    height: 36px;
    border-radius: .7rem;
    background: #fff;
    color: var(--accent);
    display: grid;
    place-items: center
}

.menu-section {
    padding: .75rem .9rem 0;
    font-size: .7rem;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: #9fb0ff78
}

.menu {
    padding: .5rem .6rem 1.25rem
}

.menu .nav-link {
    color: #e5e7eb;
    display: flex;
    align-items: center;
    gap: .6rem;
    border-radius: .8rem;
    padding: .55rem .7rem
}

.menu .nav-link:hover {
    background: rgba(255, 255, 255, .06)
}

.menu .nav-link.active {
    background: linear-gradient(90deg, rgba(230, 0, 26, .35), rgba(255, 184, 34, .35));
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .08)
}

/* Main + Topbar */
.main {
    margin-left: var(--side-w);
    min-height: 100vh
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 1040;
    background: #fff;
    box-shadow: 0 1px 0 rgba(2, 8, 23, .06)
}

.dropdown-menu { z-index:1050; }


/* Cards */
.card {
    border: 0;
    box-shadow: var(--shadow);
    border-radius: var(--radius)
}

.kpi .icon {
    font-size: 1.6rem
}

/* Mini chart canvases */
.mini {
    height: 140px
}

/* Inputs */
.form-ghost {
    background: #fff;
    border: 1px solid rgba(2, 8, 23, .08);
    border-radius: .8rem
}

.form-ghost:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 .2rem rgba(230, 0, 26, .15)
}




/* Responsive */
@media (max-width: 991.98px) {
    :root {
        --side-w: 0
    }

    .sidebar {
        transform: translateX(-100%);
        transition: transform .2s ease
    }

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

    .main {
        margin-left: 0
    }
}