:root {
    --nav-bg: linear-gradient(120deg, #0e1b3d 0%, #153063 45%, #1c3f82 100%);
    --nav-accent: #3bb8db;
    --nav-text: #e9f0ff;
    --panel-bg: #0f172a;
    --panel-border: rgba(255, 255, 255, 0.08);
    --content-bg: #ffffff;
    --content-radius: 18px;
    --shadow-lg: 0 16px 44px rgba(15, 23, 42, 0.16);
}

body.app-surface {
    background: radial-gradient(circle at 20% 20%, rgba(67, 97, 238, 0.08), transparent 25%),
                radial-gradient(circle at 80% 0%, rgba(15, 23, 42, 0.10), transparent 35%),
                #eef2f7;
    min-height: 100vh;
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    color: #0f172a;
}


.app-navbar {
    position: sticky;
    top: 0;
    z-index: 1030;
    background: var(--nav-bg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 16px 34px rgba(0, 0, 0, 0.10);
}

.navbar-brand {
    color: var(--nav-text) !important;
}

.brand-mark {
    background: #ffffff;
    border-radius: 14px;
    padding: 8px 10px;
    box-shadow: 0 8px 18px rgba(0, 0, 0, 0.12);
}

.brand-logo {
    height: 44px;
    width: auto;
    display: block;
}

.brand-title {
    font-weight: 700;
    letter-spacing: 0.2px;
    color: #f8fbff;
    font-size: 1.05rem;
}

.brand-subtitle {
    color: rgba(233, 240, 255, 0.82);
    font-weight: 500;
}

.btn-glow {
    box-shadow: 0 12px 26px rgba(59, 184, 219, 0.35);
}

.btn-outline-light {
    border-color: rgba(255, 255, 255, 0.5);
    color: #ffffff;
}

.btn-outline-light:hover {
    background: #ffffff;
    color: #0b1437;
}


.app-wrapper {
    padding-top: 1.5rem;
    padding-bottom: 2rem;
}

.content-panel {
    background: var(--content-bg);
    border-radius: var(--content-radius);
    padding: 1.75rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(17, 26, 61, 0.06);
    backdrop-filter: blur(4px);
}

.app-footer {
    background: #0b1437;
    color: #e9f0ff;
    padding: 1.25rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-logo {
    background: rgba(255, 255, 255, 0.06);
    border-radius: 14px;
    padding: 8px 10px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-mark {
    height: 38px;
    width: auto;
    display: block;
}

.footer-links a {
    font-weight: 600;
    text-decoration: none;
    color: rgba(233, 240, 255, 0.75);
}

.footer-links a:hover {
    color: #ffffff !important;
}

@media (max-width: 992px) {
    .navbar-nav .nav-link {
        padding: 0.75rem 1rem;
    }

    .content-panel {
        padding: 1.25rem;
    }

    .brand-title {
        font-size: 1rem;
    }
}

.menu-toggler {
    border: 1px solid rgba(255, 255, 255, 0.45);
    color: #fff;
    border-radius: 12px;
    padding: 0.45rem 0.7rem;
}

.menu-toggler:focus {
    box-shadow: 0 0 0 0.2rem rgba(59, 184, 219, 0.35);
}

.app-menu-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.85rem;
}

.app-menu-item .nav-link {
    color: #e9f0ff;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 14px;
    padding: 0.75rem 0.95rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.55rem;
    transition: all 0.2s ease;
}

.app-menu-item .nav-link:hover,
.app-menu-item .nav-link:focus {
    background: rgba(59, 184, 219, 0.18);
    border-color: rgba(59, 184, 219, 0.55);
    color: #ffffff;
    transform: translateY(-1px);
}

.app-menu-item .nav-link i {
    color: #7ee0f5;
}

.app-dropdown {
    border-radius: 14px;
    padding: 0.55rem;
    min-width: 280px;
}

.app-dropdown .dropdown-item {
    border-radius: 10px;
    padding: 0.55rem 0.7rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.55rem;
}

.app-dropdown .dropdown-item i {
    width: 18px;
    color: #2343a8;
}

.app-dropdown .dropdown-item:hover,
.app-dropdown .dropdown-item:focus {
    background: #eef4ff;
    color: #0f1f4d;
}

@media (max-width: 1199px) {
    .app-menu-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 991px) {
    .app-menu-grid {
        grid-template-columns: 1fr;
        margin-top: 0.35rem;
    }

    .app-menu-item .nav-link {
        justify-content: flex-start;
    }

    .app-dropdown {
        min-width: auto;
        margin-top: 0.4rem;
    }
}