:root {
    --color-bg-primary: #FBFCFD;
    --color-bg-section: #F5F7FA;
    --color-card: #FFFFFF;
    --color-bg-warm: #FAF7F4;
    --color-bg-hover: #F5F7FA;
    --color-header-start: #EFF5FC;
    --color-header-mid: #EAF3FF;
    --color-header-end: #F5F8FC;
    --color-header-border: #D8E2F0;
    --color-border: #E4E7EC;
    --color-border-strong: #D0D5DD;
    --color-text-primary: #20242A;
    --color-text-secondary: #667085;
    --color-text-tertiary: #98A2B3;
    --color-brand: #3977E8;
    --color-brand-solid: #3672DF;
    --color-brand-hover: #285FC4;
    --color-brand-light: #EAF3FF;
    --color-nav-active-bg: #DCEAFF;
    --color-nav-active-hover: #D4E6FF;
    --color-nav-active-border: #A9C5F2;
    --color-nav-active-text: #2457A6;
    --color-success: #2F7D5B;
    --color-success-bg: #EAF7F1;
    --color-success-border: #B8DDCC;
    --color-warning: #8A6420;
    --color-warning-bg: #FFF4DC;
    --color-warning-border: #E8D4A3;
    --color-danger: #B42318;
    --color-danger-hover: #912018;
    --color-danger-bg: #FEF3F2;
    --color-danger-border: #FECDCA;
    --color-focus-ring: rgba(57, 119, 232, 0.22);
    --color-shadow: 16, 24, 40;
    --shadow-sm: 0 1px 2px rgba(var(--color-shadow), 0.04);
    --shadow-md: 0 4px 12px rgba(var(--color-shadow), 0.08);
    --shadow-lg: 0 12px 32px rgba(var(--color-shadow), 0.12);
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

html {
    position: relative;
    min-height: 100%;
    font-size: 16px;
}

@media (min-width: 768px) {
    html {
        font-size: 18px;
    }
}

body {
    background-color: var(--color-bg-primary);
    background-image: linear-gradient(
        180deg,
        #F0F5FC 0,
        #F7F9FC 230px,
        var(--color-bg-primary) 540px
    );
    background-attachment: fixed;
    color: var(--color-text-primary);
}

.btn:focus-visible,
.btn:active:focus,
.btn-link.nav-link:focus-visible,
.form-control:focus,
.form-check-input:focus,
.navbar-toggler:focus-visible {
    border-color: var(--color-brand);
    box-shadow: 0 0 0 0.2rem var(--color-focus-ring);
    outline: none;
}

.btn-primary {
    background-color: var(--color-brand-solid);
    border-color: var(--color-brand-solid);
    color: #FFFFFF;
}

.btn-primary:hover,
.btn-primary:focus-visible {
    background-color: var(--color-brand-hover);
    border-color: var(--color-brand-hover);
    color: #FFFFFF;
}

.btn-outline-primary {
    background-color: var(--color-card);
    border-color: var(--color-brand);
    color: var(--color-brand-hover);
}

.btn-outline-primary:hover,
.btn-outline-primary:focus-visible {
    background-color: var(--color-brand-hover);
    border-color: var(--color-brand-hover);
    color: #FFFFFF;
}

.navbar {
    background: linear-gradient(
        90deg,
        var(--color-header-start) 0%,
        var(--color-header-mid) 52%,
        var(--color-header-end) 100%
    ) !important;
    border-color: var(--color-header-border) !important;
    box-shadow: 0 1px 3px rgba(var(--color-shadow), 0.06);
}

.navbar-brand,
.navbar .nav-link {
    color: var(--color-text-primary) !important;
    font-weight: 700;
}

.navbar .nav-link {
    display: flex;
    align-items: center;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    padding: 0.35rem 0.75rem;
    transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.navbar .nav-link:hover {
    background-color: var(--color-brand-light);
    color: var(--color-brand-hover) !important;
}

.navbar .nav-link:focus-visible {
    background-color: var(--color-brand-light);
    color: var(--color-brand-hover) !important;
}

.navbar .nav-link.active {
    background-color: var(--color-nav-active-bg);
    border-color: var(--color-nav-active-border);
    box-shadow: 0 1px 4px rgba(40, 95, 196, 0.12);
    color: var(--color-nav-active-text) !important;
}

.navbar .nav-link.active:hover {
    background-color: var(--color-nav-active-hover);
    border-color: var(--color-nav-active-border);
    color: var(--color-nav-active-text) !important;
}

.navbar .nav-link.active:focus-visible {
    background-color: var(--color-nav-active-bg);
    border-color: var(--color-nav-active-border);
    color: var(--color-nav-active-text) !important;
    outline: 2px solid var(--color-brand);
    outline-offset: 2px;
    box-shadow: 0 0 0 0.2rem var(--color-focus-ring), 0 1px 4px rgba(40, 95, 196, 0.12);
}

.navbar-actions {
    gap: 0.5rem;
}

.navbar .nav-link.navbar-official-link {
    justify-content: center;
    gap: 0.4rem;
    padding: 0.65rem 1.1rem;
    background-color: var(--color-brand-solid);
    border-color: var(--color-brand-solid);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 12px rgba(40, 95, 196, 0.22);
    color: #FFFFFF !important;
    white-space: nowrap;
}

.navbar .nav-link.navbar-official-link:hover,
.navbar .nav-link.navbar-official-link:focus-visible {
    background-color: var(--color-brand-hover);
    border-color: var(--color-brand-hover);
    box-shadow: 0 6px 16px rgba(40, 95, 196, 0.28);
    color: #FFFFFF !important;
}

.navbar .nav-link.navbar-official-link:focus-visible {
    outline: 2px solid var(--color-brand-hover);
    outline-offset: 2px;
}

.navbar-external-mark {
    font-size: 0.9em;
    line-height: 1;
}

.navbar-toggler {
    border-color: var(--color-border-strong);
}

.navbar-icon-slot {
    background-color: #f5f8fc;
    border: 1px solid var(--color-header-border);
    box-shadow: 0 1px 2px rgba(var(--color-shadow), 0.08);
    cursor: pointer;
    transition: transform 0.3s ease !important;
}

.navbar .nav-link.active .navbar-icon-slot {
    background-color: #fff;
    border-color: #b8d1f5;
    box-shadow: 0 1px 2px rgba(40, 95, 196, 0.1);
}

.navbar-icon-slot:hover {
    transform: scale(1.06);
}

.box-shadow {
    box-shadow: var(--shadow-sm);
}

.form-floating > .form-control-plaintext::placeholder,
.form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder,
.form-floating > .form-control:focus::placeholder {
    text-align: start;
}

@media (max-width: 1199.98px) {
    .navbar-actions {
        padding-top: 0.75rem;
    }

    .navbar .nav-link {
        width: 100%;
    }
}