:root {
    /* Cores modo NORMAL (cores originais do site) */
    --bg-color-normal: #ffffff;
    --text-color-normal: #212529;
    --navbar-bg-normal: #002b80;
    --navbar-text-normal: #ffffff;
    --border-color-normal: #dee2e6;
    --hover-bg-normal: rgba(255, 255, 255, 0.15);
    --primary-color-normal: #002b80;
    --card-bg-normal: #ffffff;
    --dropdown-bg-normal: #ffffff;
    --dropdown-text-normal: #212529;
    --dropdown-hover-normal: #f8f9fa;
    --footer-bg-normal: #343a40;
    --footer-text-normal: #ffffff;
    
    /* Cores modo ALTO CONTRASTE (preto/branco puro) */
    --bg-color-highcontrast: #000000;
    --text-color-highcontrast: #ffffff;
    --navbar-bg-highcontrast: #000000;
    --navbar-text-highcontrast: #ffffff;
    --border-color-highcontrast: #ffffff;
    --hover-bg-highcontrast: #333333;
    --primary-color-highcontrast: #ffffff;
    --card-bg-highcontrast: #000000;
    --dropdown-bg-highcontrast: #000000;
    --dropdown-text-highcontrast: #ffffff;
    --dropdown-hover-highcontrast: #333333;
    --footer-bg-highcontrast: #000000;
    --footer-text-highcontrast: #ffffff;
    
    /* Variáveis atuais (inicialmente modo normal) */
    --bg-color: var(--bg-color-normal);
    --text-color: var(--text-color-normal);
    --navbar-bg: var(--navbar-bg-normal);
    --navbar-text: var(--navbar-text-normal);
    --border-color: var(--border-color-normal);
    --hover-bg: var(--hover-bg-normal);
    --primary-color: var(--primary-color-normal);
    --card-bg: var(--card-bg-normal);
    --dropdown-bg: var(--dropdown-bg-normal);
    --dropdown-text: var(--dropdown-text-normal);
    --dropdown-hover: var(--dropdown-hover-normal);
    --footer-bg: var(--footer-bg-normal);
    --footer-text: var(--footer-text-normal);
}

/* MODO ALTO CONTRASTE */
[data-theme="highcontrast"] {
    --bg-color: var(--bg-color-highcontrast);
    --text-color: var(--text-color-highcontrast);
    --navbar-bg: var(--navbar-bg-highcontrast);
    --navbar-text: var(--navbar-text-highcontrast);
    --border-color: var(--border-color-highcontrast);
    --hover-bg: var(--hover-bg-highcontrast);
    --primary-color: var(--primary-color-highcontrast);
    --card-bg: var(--card-bg-highcontrast);
    --dropdown-bg: var(--dropdown-bg-highcontrast);
    --dropdown-text: var(--dropdown-text-highcontrast);
    --dropdown-hover: var(--dropdown-hover-highcontrast);
    --footer-bg: var(--footer-bg-highcontrast);
    --footer-text: var(--footer-text-highcontrast);
}

/* APLICAÇÃO GLOBAL */
[data-theme="highcontrast"] body {
    background-color: var(--bg-color) !important;
    color: var(--text-color) !important;
}

[data-theme="highcontrast"] .navbar {
    background-color: var(--navbar-bg) !important;
}

[data-theme="highcontrast"] .navbar-brand,
[data-theme="highcontrast"] .nav-link,
[data-theme="highcontrast"] .navbar-text {
    color: var(--navbar-text) !important;
}

[data-theme="highcontrast"] .nav-link:hover {
    background-color: var(--hover-bg) !important;
}

[data-theme="highcontrast"] .dropdown-menu {
    background-color: var(--dropdown-bg) !important;
    border-color: var(--border-color) !important;
}

[data-theme="highcontrast"] .dropdown-item {
    color: var(--dropdown-text) !important;
    background-color: var(--dropdown-bg) !important;
}

[data-theme="highcontrast"] .dropdown-item:hover {
    background-color: var(--dropdown-hover) !important;
    color: var(--dropdown-text) !important;
}

[data-theme="highcontrast"] .card {
    background-color: var(--card-bg) !important;
    border-color: var(--border-color) !important;
    color: var(--text-color) !important;
}

[data-theme="highcontrast"] .bg-dark {
    background-color: var(--footer-bg) !important;
    color: var(--footer-text) !important;
}

[data-theme="highcontrast"] .btn-primary {
    background-color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
    color: var(--bg-color) !important;
}

[data-theme="highcontrast"] .text-dark {
    color: var(--text-color) !important;
}

[data-theme="highcontrast"] .text-muted {
    color: #cccccc !important;
}

[data-theme="highcontrast"] a:not(.btn) {
    text-decoration: underline !important;
    color: var(--primary-color) !important;
}

/* BOTÕES DE TEMA */
.theme-buttons {
    display: flex;
    gap: 0.5rem;
}

.theme-toggle-btn {
    background: var(--navbar-bg);
    border: 1px solid var(--navbar-text);
    color: var(--navbar-text);
    padding: 0.375rem 0.75rem;
    border-radius: 0.375rem;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.15s ease;
}

.theme-toggle-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.theme-toggle-btn.active {
    background: var(--navbar-text);
    color: var(--navbar-bg);
    font-weight: 600;
}

/* TRANSITION SUAVE */
.theme-transition * {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}