/* =========================================================
   Design tokens — fonte única de cores, espaçamento, raio,
   sombra e tipografia. Incluído em TODAS as telas do sistema.
   ========================================================= */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    /* Tipografia (família única do sistema) */
    --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --fs-xs: 0.75rem;
    --fs-sm: 0.875rem;
    --fs-base: 0.9375rem;
    --fs-md: 1rem;
    --fs-lg: 1.125rem;
    --fs-xl: 1.375rem;
    --fs-2xl: 1.75rem;
    --fw-regular: 400;
    --fw-medium: 500;
    --fw-semibold: 600;
    --fw-bold: 700;
    --lh-tight: 1.25;
    --lh-base: 1.55;

    /* Cores — paleta sóbria baseada no azul institucional (contraste AA) */
    --color-primary: #1d4ed8;          /* 6.7:1 sobre branco */
    --color-primary-rgb: 29, 78, 216;
    --color-primary-hover: #1e40af;
    --color-primary-strong: #1e3a8a;
    --color-primary-soft: #eef3ff;
    --color-bg: #f4f6fb;
    --color-surface: #ffffff;
    --color-surface-2: #f8fafc;
    --color-border: #e2e8f0;
    --color-border-strong: #cbd5e1;
    --color-text: #0f172a;
    --color-text-muted: #4b5568;       /* 7.4:1 sobre branco */
    --color-text-subtle: #64748b;      /* 4.7:1 sobre branco */
    --color-success: #15803d;
    --color-success-soft: #ecfdf3;
    --color-danger: #b91c1c;
    --color-danger-soft: #fef2f2;
    --color-warning: #92400e;
    --color-warning-soft: #fffbeb;
    --color-focus: #2563eb;

    /* Barra lateral */
    --sidebar-bg: #0f1d45;
    --sidebar-sub-bg: #0b1638;
    --sidebar-text: #c7d0e4;           /* 10:1 sobre o fundo */
    --sidebar-text-strong: #ffffff;
    --sidebar-muted: #93a1c2;          /* 6:1 sobre o fundo */
    --sidebar-hover-bg: rgba(255, 255, 255, 0.07);
    --sidebar-active-bg: rgba(96, 165, 250, 0.18);
    --sidebar-accent: #60a5fa;
    --sidebar-border: rgba(255, 255, 255, 0.08);
    --sidebar-w: 272px;

    /* Espaçamento */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-7: 2.5rem;
    --space-8: 3rem;

    /* Raio */
    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 14px;
    --radius-pill: 999px;

    /* Sombra */
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
    --shadow: 0 1px 2px rgba(15, 23, 42, 0.05), 0 4px 14px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 10px 30px rgba(15, 23, 42, 0.12);
    --focus-ring: 0 0 0 3px rgba(37, 99, 235, 0.35);

    --transition: 0.2s ease;

    /* Integração com Bootstrap 5.3 */
    --bs-body-font-family: var(--font-sans);
    --bs-body-font-size: var(--fs-base);
    --bs-body-line-height: var(--lh-base);
    --bs-body-color: var(--color-text);
    --bs-secondary-color: var(--color-text-muted);
    --bs-primary: var(--color-primary);
    --bs-primary-rgb: var(--color-primary-rgb);
    --bs-link-color: var(--color-primary);
    --bs-link-color-rgb: var(--color-primary-rgb);
    --bs-link-hover-color: var(--color-primary-hover);
    --bs-link-hover-color-rgb: 30, 64, 175;
    --bs-border-color: var(--color-border);
    --bs-border-radius: var(--radius-sm);
    --bs-border-radius-lg: var(--radius);
    --bs-focus-ring-color: rgba(37, 99, 235, 0.35);
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: var(--fs-base);
    line-height: var(--lh-base);
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6 {
    font-family: var(--font-sans);
    color: var(--color-text);
    line-height: var(--lh-tight);
    font-weight: var(--fw-semibold);
}

.text-muted,
.text-secondary {
    color: var(--color-text-muted) !important;
}

/* Foco sempre visível para navegação por teclado */
:focus-visible {
    outline: 2px solid var(--color-focus);
    outline-offset: 2px;
}

.btn:focus-visible,
.form-control:focus,
.form-select:focus,
.form-check-input:focus {
    border-color: var(--color-focus);
    box-shadow: var(--focus-ring);
}

.btn:focus-visible {
    outline: 2px solid var(--color-focus);
    outline-offset: 2px;
}

/* Botões com a paleta do sistema */
.btn {
    font-weight: var(--fw-medium);
    border-radius: var(--radius-sm);
}

.btn-primary {
    --bs-btn-bg: var(--color-primary);
    --bs-btn-border-color: var(--color-primary);
    --bs-btn-hover-bg: var(--color-primary-hover);
    --bs-btn-hover-border-color: var(--color-primary-hover);
    --bs-btn-active-bg: var(--color-primary-strong);
    --bs-btn-active-border-color: var(--color-primary-strong);
    --bs-btn-disabled-bg: var(--color-primary);
    --bs-btn-disabled-border-color: var(--color-primary);
}

.btn-outline-primary {
    --bs-btn-color: var(--color-primary);
    --bs-btn-border-color: var(--color-primary);
    --bs-btn-hover-bg: var(--color-primary);
    --bs-btn-hover-border-color: var(--color-primary);
    --bs-btn-active-bg: var(--color-primary-hover);
    --bs-btn-active-border-color: var(--color-primary-hover);
}

.form-label {
    font-weight: var(--fw-medium);
    color: var(--color-text);
}

/* Link "pular para o conteúdo" (acessibilidade) */
.skip-link {
    position: absolute;
    left: var(--space-4);
    top: -100px;
    z-index: 2000;
    padding: var(--space-2) var(--space-4);
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: var(--fw-semibold);
}

.skip-link:focus {
    top: var(--space-4);
    color: #fff;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}