/* =========================================================
   CSS VARIABLES - IDENTIDADE VISUAL
   ========================================================= */

:root {
    /* Colors */
    --cvb-primary: #19A7A0;
    --cvb-primary-dark: #12857F;
    --cvb-primary-light: #EAF8F7;
    --cvb-background: #FFFFFF;
    --cvb-background-soft: #F7F9F9;
    --cvb-background-section: #F1FAF9;
    --cvb-text: #263238;
    --cvb-text-secondary: #66757D;
    --cvb-text-light: #8A989D;
    --cvb-border: #E5ECEC;
    --cvb-success: #2E9D72;
    --cvb-warning: #D99A2B;
    --cvb-danger: #D95C5C;

    /* Typography */
    --cvb-font-primary: 'Inter', system-ui, Arial, sans-serif;
    --cvb-font-weight-heading: 800;
    --cvb-letter-spacing-heading: -0.025em;

    /* Layout */
    --cvb-max-width: 1200px;
    --cvb-content-width: 760px;
    --cvb-sidebar-width: 320px;

    /* Spacing */
    --cvb-spacing-xs: 4px;
    --cvb-spacing-sm: 8px;
    --cvb-spacing-md: 16px;
    --cvb-spacing-lg: 24px;
    --cvb-spacing-xl: 32px;
    --cvb-spacing-xxl: 48px;
    --cvb-spacing-section: 72px;

    /* Border Radius */
    --cvb-radius-sm: 6px;
    --cvb-radius-md: 10px;
    --cvb-radius-lg: 16px;
    --cvb-radius-pill: 999px;

    /* Shadows */
    --cvb-shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
    --cvb-shadow-md: 0 4px 16px rgba(0,0,0,0.06);
    --cvb-shadow-lg: 0 15px 40px rgba(0,0,0,0.10);

    /* Transitions */
    --cvb-transition: 0.2s ease;
    --cvb-transition-fast: 0.15s ease;
}

/* =========================================================
   RESET & BASE
   ========================================================= */

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--cvb-font-primary);
    font-size: 17px;
    line-height: 1.75;
    color: var(--cvb-text);
    background: var(--cvb-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--cvb-primary);
    text-decoration: none;
    transition: var(--cvb-transition);
}

a:hover {
    color: var(--cvb-primary-dark);
}

ul, ol {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--cvb-font-weight-heading);
    letter-spacing: var(--cvb-letter-spacing-heading);
    color: var(--cvb-text);
    line-height: 1.3;
}

h1 { font-size: 42px; }
h2 { font-size: 30px; }
h3 { font-size: 23px; }
h4 { font-size: 18px; }

p {
    margin-bottom: var(--cvb-spacing-md);
}

/* =========================================================
   UTILITY CLASSES
   ========================================================= */

.container {
    max-width: var(--cvb-max-width);
    margin: 0 auto;
    padding: 0 var(--cvb-spacing-md);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.text-center { text-align: center; }
.text-primary { color: var(--cvb-primary); }
.text-secondary { color: var(--cvb-text-secondary); }
.text-light { color: var(--cvb-text-light); }

.bg-soft { background: var(--cvb-background-soft); }
.bg-section { background: var(--cvb-background-section); }

/* =========================================================
   ACCESSIBILITY
   ========================================================= */

:focus-visible {
    outline: 3px solid var(--cvb-primary);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}