/* =========================================
   1. DESIGN SYSTEM - VARIÁVEIS CSS
   ========================================= */
@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;700;800&display=swap');

:root {
    --cor-primaria-base: #2E7D32;
    --cor-primaria-claro: #4CAF50;
    --cor-primaria-escuro: #1B5E20;

    --cor-secundaria-base: #E67E22;
    --cor-secundaria-escuro: #D35400;

    --cor-neutra-fundo: #F9F9F9;
    --cor-neutra-texto: #5D4037;
    --cor-neutra-borda: #E0E0E0;

    --tamanho-texto-xlg: 3rem;
    --tamanho-texto-lg: 2rem;
    --tamanho-texto-md: 1.5rem;
    --tamanho-texto-base: 1rem;
    --tamanho-texto-sm: 0.875rem;

    --espaco-xs: 8px;
    --espaco-sm: 16px;
    --espaco-md: 24px;
    --espaco-lg: 32px;
    --espaco-xl: 48px;
    --espaco-xxl: 64px;

    --raio-borda: 8px;
    --sombra-padrao: 0 4px 8px rgba(0,0,0,0.1);
    --sombra-elevada: 0 8px 16px rgba(0,0,0,0.15);
}

/* =========================================
   2. GERAL E ESTRUTURA
   ========================================= */
* { box-sizing: border-box; }

body {
    font-family: 'Nunito', sans-serif;
    line-height: 1.6;
    color: var(--cor-neutra-texto);
    background-color: var(--cor-neutra-fundo);
    margin: 0;
    padding: 0;
    font-size: var(--tamanho-texto-base);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--espaco-sm);
}

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

section {
    padding: var(--espaco-xxl) 0;
}

h1, h2 {
    color: var(--cor-primaria-base);
    text-align: center;
    font-weight: 800;
    margin: 0 0 var(--espaco-md) 0;
}

h1 {
    font-size: var(--tamanho-texto-lg);
    margin-bottom: var(--espaco-lg);
}
h2 {
    font-size: var(--tamanho-texto-md);
    margin-bottom: var(--espaco-md);
}

/* =========================================
   3. CABEÇALHO (HEADER)
   ========================================= */
.site-header {
    display: grid;
    grid-template-columns: 220px 1fr;
    align-items: center;
    padding: var(--espaco-sm) 0;
    border-bottom: 1px solid var(--cor-neutra-borda);
    gap: var(--espaco-sm);
}

.site-header img {
    width: 200px;
    max-width: 100%;
}

/* Navegação (Flex) */
header nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: flex-end;
    gap: var(--espaco-md);
}

header nav a {
    text-decoration: none;
    color: var(--cor-neutra-texto);
    font-weight: 700;
    font-size: var(--tamanho-texto-base);
    padding: var(--espaco-xs) var(--espaco-sm);
    transition: color 0.3s;
}

header nav a:hover {
    color: var(--cor-secundaria-base);
}

/* Dropdown */
.dropdown {
    position: relative;
}
.dropdown-content {
    display: none;
    position: absolute;
    background-color: white;
    min-width: 200px;
    box-shadow: var(--sombra-padrao);
    z-index: 10;
    top: 100%;
    left: 0;
    border-radius: var(--raio-borda);
    padding: var(--espaco-xs) 0;
    border: 1px solid var(--cor-neutra-borda);
}
.dropdown-content li { padding: 0; }
.dropdown-content a {
    color: var(--cor-neutra-texto);
    padding: var(--espaco-xs) var(--espaco-sm);
    display: block;
    font-weight: 400;
    font-size: var(--tamanho-texto-base);
}
.dropdown-content a:hover {
    background-color: var(--cor-neutra-fundo);
    color: var(--cor-primaria-escuro);
}
/* Acessibilidade: abre também no foco */
.dropdown:hover .dropdown-content,
.dropdown:focus-within .dropdown-content {
    display: block;
}

/* =========================================
   4. HERO
   ========================================= */
.hero {
    background-image: linear-gradient(rgba(0,0,0,0.45), rgba(0,0,0,0.45)), url('../img/foto-principal.png');
    background-size: cover;
    background-position: center;
    color: white;
    text-align: center;
    padding: 100px var(--espaco-sm);
    border-radius: var(--raio-borda);
    margin-top: var(--espaco-lg);
}
.hero h1 {
    font-size: var(--tamanho-texto-xlg);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.6);
    margin-bottom: var(--espaco-md);
}
.hero p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto var(--espaco-lg) auto;
}

/* =========================================
   5. COMPONENTES E BOTÕES
   ========================================= */
.cta-button {
    display: inline-block;
    background-color: var(--cor-secundaria-base);
    color: white;
    padding: var(--espaco-sm) var(--espaco-lg);
    font-weight: bold;
    border-radius: var(--raio-borda);
    transition: background-color 0.3s, transform 0.3s;
    border: none;
    cursor: pointer;
    font-size: var(--tamanho-texto-base);
    text-transform: uppercase;
}
.cta-button:hover {
    background-color: var(--cor-secundaria-escuro);
    transform: translateY(-2px);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}
.cta-button:active { transform: translateY(0); }

/* Projects grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--espaco-xl);
    margin-top: var(--espaco-xl);
    justify-content: center;
}
.card {
    background-color: white;
    border-radius: var(--raio-borda);
    overflow: hidden;
    box-shadow: var(--sombra-padrao);
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
}
.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--sombra-elevada);
}
.card img {
    height: 200px;
    width: 100%;
    object-fit: cover;
}
.card article {
    padding: var(--espaco-md);
    flex-grow: 1;
}
.card h2 {
    margin-top: 0;
    text-align: left;
    font-size: 1.3rem;
    margin-bottom: var(--espaco-sm);
}
.card-link { text-decoration: none; color: inherit; display: block; }
.card-link:focus { outline: 3px solid rgba(46,125,50,0.12); border-radius: 6px; }

/* Call to action section */
.call-to-action {
    text-align: center;
    background-color: #f0f4f0;
    padding: var(--espaco-xxl) var(--espaco-lg);
    border-radius: var(--raio-borda);
    margin-top: var(--espaco-xxl);
}

/* Badges */
.badge {
    display: inline-block;
    padding: var(--espaco-xs) var(--espaco-sm);
    border-radius: 15px;
    font-size: var(--tamanho-texto-sm);
    font-weight: 700;
    text-transform: uppercase;
    margin-right: var(--espaco-xs);
    margin-bottom: var(--espaco-xs);
}
.badge-success { background-color: var(--cor-primaria-claro); color: white; }
.badge-info { background-color: #3498DB; color: white; }

/* Alerts */
.alert {
    padding: var(--espaco-sm) var(--espaco-md);
    border-radius: var(--raio-borda);
    margin-top: var(--espaco-lg);
    margin-bottom: var(--espaco-lg);
    font-weight: 700;
    border: 1px solid transparent;
}
.alert-success { background-color: #D4EDDA; color: #155724; border-color: #C3E6CB; }
.alert-error { background-color: #F8D7DA; color: #721C24; border-color: #F5C6CB; }
.app-alert { margin: var(--espaco-md) 0; }

/* =========================================
   6. FORMULÁRIO E VALIDAÇÃO
   ========================================= */
form {
    background-color: white;
    padding: var(--espaco-xl);
    border-radius: var(--raio-borda);
    margin: var(--espaco-lg) auto 0 auto;
    box-shadow: var(--sombra-padrao);
    max-width: 800px;
}
form fieldset {
    border: 1px solid var(--cor-neutra-borda);
    border-radius: var(--raio-borda);
    margin-bottom: var(--espaco-lg);
    padding: var(--espaco-md);
}
form legend {
    font-weight: bold;
    color: var(--cor-primaria-escuro);
    padding: 0 var(--espaco-xs);
    font-size: 1.1rem;
}
form label {
    display: block;
    margin-bottom: var(--espaco-xs);
    font-weight: 700;
}
form input[type="text"],
form input[type="email"],
form input[type="tel"],
form input[type="date"],
form textarea,
form select {
    width: 100%;
    padding: var(--espaco-sm);
    margin-bottom: var(--espaco-sm);
    border: 1px solid var(--cor-neutra-borda);
    border-radius: var(--raio-borda);
    box-sizing: border-box;
    transition: border-color 0.3s, box-shadow 0.3s;
}
form textarea { min-height: 120px; resize: vertical; }

form input:focus, form textarea:focus, form select:focus {
    border-color: var(--cor-secundaria-base);
    box-shadow: 0 0 0 2px rgba(230,126,34,0.2);
    outline: none;
}

/* Visual validation */
form input:required:invalid:not(:focus):not(:placeholder-shown) {
    border-color: #E74C3C;
}
.input-error {
    border: 2px solid #E74C3C !important;
    box-shadow: 0 0 0 3px rgba(231,76,60,0.06);
}
.field-error {
    color: #721C24;
    margin-top: calc(var(--espaco-xs) / 2);
    margin-bottom: var(--espaco-sm);
    font-weight: 700;
}

/* =========================================
   7. RODAPÉ
   ========================================= */
footer {
    border-top: 1px solid var(--cor-neutra-borda);
    margin-top: var(--espaco-xxl);
    padding: var(--espaco-lg) 0;
    text-align: center;
    background-color: white;
}
footer nav ul {
    list-style-type: none;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: var(--espaco-md);
    margin-bottom: var(--espaco-md);
}
footer nav a {
    text-decoration: none;
    color: var(--cor-secundaria-base);
    font-size: var(--tamanho-texto-sm);
}
footer nav a:hover { text-decoration: underline; }
footer p { font-size: var(--tamanho-texto-sm); color: #888; }

/* =========================================
   8. BREAKPOINTS RESPONSIVOS
   ========================================= */
/* Ultra-Pequeno (320px) */
@media (max-width: 320px) {
    .site-header img { width: 150px; }
}

/* Mobile Padrão (<= 480px) */
@media (max-width: 480px) {
    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.3rem; }
    .hero { padding: 60px var(--espaco-sm); }
    .hero h1 { font-size: 2.2rem; }
    .projects-grid { grid-template-columns: 1fr; gap: var(--espaco-lg); }
    .site-header {
        grid-template-columns: 1fr;
        grid-template-areas: "logo" "nav";
        text-align: center;
        gap: var(--espaco-sm);
    }
    header nav { grid-area: nav; }
    header nav ul {
        flex-direction: column;
        align-items: center;
        gap: var(--espaco-xs);
    }
    .dropdown-content {
        position: static;
        box-shadow: none;
        border: none;
        padding-left: var(--espaco-md);
    }
    .card img { height: 160px; }
    header nav ul { justify-content: center; }
    form { padding: var(--espaco-md); }
}

/* Mobile Grande / Tablet Pequeno (600px) */
@media (max-width: 600px) {
    .site-header {
        grid-template-columns: 1fr;
        gap: var(--espaco-sm);
        padding: var(--espaco-md) 0;
    }
}

/* Tablet Padrão (768px) */
@media (max-width: 768px) {
    .site-header {
        grid-template-columns: 1fr;
        gap: var(--espaco-sm);
    }
    header nav ul { justify-content: center; }
    .projects-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Desktop Pequeno (992px) */
@media (max-width: 992px) {
    .projects-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Desktop Médio (1200px+) */
@media (min-width: 1201px) {
    /* pequenos ajustes para telas largas */
}

/* =========================================
   9. Acessibilidade e Foco
   ========================================= */
a:focus, button:focus, input:focus, textarea:focus {
    outline: 3px solid rgba(230,126,34,0.15);
    outline-offset: 2px;
}

/* =========================================
   10. Pequenos Utilities
   ========================================= */
.hidden { display: none !important; }
.text-center { text-align: center; }