/* ==========================================
   1. VARIÁVEIS GLOBAIS (LIGHT MODE - PADRÃO)
   ========================================== */
:root, [data-theme="light"] {
    --bg-color: #FFFFFF;
    --surface-color: #F8F9FA;
    --text-primary: #202124;
    --text-secondary: #5F6368;
    --primary-color: #4285F4;
    --success-color: #34A853;
    --warning-color: #FBBC05;
    --danger-color: #EA4335;
    --border-color: #DADCE0;
    --shadow-sm: 0 1px 2px 0 rgba(60,64,67,0.3), 0 1px 3px 1px rgba(60,64,67,0.15);
    --shadow-md: 0 4px 6px -1px rgba(60,64,67,0.1), 0 2px 4px -1px rgba(60,64,67,0.06);
    --font-main: 'Roboto', 'Inter', sans-serif;
}

/* ==========================================
   2. VARIÁVEIS GLOBAIS (DARK MODE)
   ========================================== */
/* Se o SO for escuro e não houver forçamento para o claro */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg-color: #121212;
        --surface-color: #1E1E1E;
        --text-primary: #E8EAED;
        --text-secondary: #9AA0A6;
        --primary-color: #8AB4F8;
        --border-color: #3C4043;
        --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.5);
        --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4);
    }
}

/* Forçado pelo botão */
[data-theme="dark"] {
    --bg-color: #121212;
    --surface-color: #1E1E1E;
    --text-primary: #E8EAED;
    --text-secondary: #9AA0A6;
    --primary-color: #8AB4F8;
    --border-color: #3C4043;
    --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.5);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4);
}

/* ==========================================
   3. RESET E CONFIGURAÇÕES BASE
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.3s ease, color 0.3s ease; 
}

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

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