/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-primary: #1B5E20;
    --color-primary-dark: #0D3D11;
    --color-primary-light: #2E7D32;
    --color-white: #FFFFFF;
    --color-light-bg: #F5F5F5;
    --color-text: #212121;
    --color-text-light: #757575;
    --color-border: #E0E0E0;
    --color-error: #C62828;
    --color-success: #2E7D32;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    --container-width: 1200px;
    --header-height: 70px;
    --transition: 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background-color: var(--color-white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

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

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

ul {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 8px;
    transition: all var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
    border: 2px solid var(--color-primary);
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: var(--color-white);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--color-white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    z-index: 1000;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-img {
    height: 45px;
    width: auto;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    display: none;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    font-weight: 500;
    color: var(--color-text);
    padding: var(--spacing-xs) 0;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

.admin-link {
    background-color: var(--color-primary);
    color: var(--color-white) !important;
    padding: var(--spacing-xs) var(--spacing-md) !important;
    border-radius: 6px;
}

.admin-link::after {
    display: none;
}

.admin-link:hover {
    background-color: var(--color-primary-dark);
    color: var(--color-white) !important;
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    padding: 0;
}

.hamburger-line {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition);
}

.hamburger.active .hamburger-line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.hamburger.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger.active .hamburger-line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Sections */
.section {
    padding: var(--spacing-xxl) 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background-color: var(--color-primary);
    margin: var(--spacing-sm) auto 0;
    border-radius: 2px;
}

/* Apresentação */
.apresentacao {
    background-color: var(--color-light-bg);
}

.apresentacao-content {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.125rem;
    line-height: 1.8;
    text-align: justify;
}

.apresentacao-content p {
    margin-bottom: var(--spacing-sm);
}

.apresentacao-content ul {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-lg);
}

.apresentacao-content li {
    position: relative;
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    list-style: none;
}

.apresentacao-content li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

/* Estatutos */
.estatutos-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.estatutos-content p {
    margin-bottom: var(--spacing-lg);
    font-size: 1.125rem;
}

.pdf-viewer {
    width: 100%;
    height: 600px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    margin-top: var(--spacing-md);
}

/* Projetos */
.projetos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.projeto-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    overflow: hidden;
    transition: all var(--transition);
    cursor: pointer;
}

.projeto-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
    border-color: var(--color-primary-light);
}

.projeto-card-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
    background-color: var(--color-light-bg);
}

.projeto-card-content {
    padding: var(--spacing-md);
}

.projeto-card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.projeto-card-expand {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--color-primary);
    font-weight: 500;
}

.projeto-card-expand svg {
    transition: transform var(--transition);
}

.projeto-card:hover .projeto-card-expand svg {
    transform: rotate(180deg);
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: var(--spacing-md);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
}

.modal-overlay:not([hidden]) {
    opacity: 1;
    visibility: visible;
}

.modal {
    background-color: var(--color-white);
    border-radius: 16px;
    max-width: 800px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    transform: scale(0.9);
    transition: transform var(--transition);
}

.modal-overlay:not([hidden]) .modal {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--color-light-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--color-text);
    z-index: 10;
    transition: all var(--transition);
}

.modal-close:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.modal-content {
    padding: var(--spacing-xl);
}

.modal-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.modal-description {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.modal-pdf-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 500;
    color: var(--color-primary);
}

.modal-pdf-link:hover {
    color: var(--color-primary-dark);
}

/* Contactos */
.contactos-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: start;
}

.contactos-info h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background-color: var(--color-primary);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.contact-details p {
    color: var(--color-text-light);
}

.contact-form {
    background-color: var(--color-light-bg);
    padding: var(--spacing-xl);
    border-radius: 16px;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.required {
    color: var(--color-error);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--color-border);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: all var(--transition);
    background-color: var(--color-white);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(27, 94, 32, 0.15);
}

.form-group input.error,
.form-group textarea.error {
    border-color: var(--color-error);
}

.form-message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: 8px;
    display: none;
}

.form-message.success {
    display: block;
    background-color: #E8F5E9;
    color: var(--color-success);
    border: 1px solid var(--color-success);
}

.form-message.error {
    display: block;
    background-color: #FBE9E7;
    color: var(--color-error);
    border: 1px solid var(--color-error);
}

/* Footer */
.footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    max-height: 60px;
    max-width: 150px;
    opacity: 0.8;
    transition: opacity var(--transition);
    filter: brightness(0) invert(1);
}

.footer-logo:hover {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
}

.footer-bottom p {
    font-size: 0.875rem;
    opacity: 0.7;
}

/* Responsive */
@media (max-width: 1024px) {
    .section-title {
        font-size: 2rem;
    }
    
    .contactos-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 60px;
    }
    
    .section {
        padding: var(--spacing-xl) 0;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .hamburger {
        display: flex;
    }
    
    .nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background-color: var(--color-white);
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        padding: var(--spacing-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition);
    }
    
    .nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 0;
        width: 100%;
    }
    
    .nav-link {
        display: block;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
    }
    
    .nav-link::after {
        display: none;
    }
    
    .admin-link {
        margin-top: var(--spacing-sm);
        text-align: center;
    }
    
    .projetos-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-form {
        padding: var(--spacing-lg);
    }
    
    .modal-content {
        padding: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .btn {
        width: 100%;
    }
    
    .footer-logo {
        max-height: 50px;
        max-width: 120px;
    }
}

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

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

.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 8px;
    z-index: 10000;
    transition: top var(--transition);
}

.skip-link:focus {
    top: var(--spacing-md);
}

/* Loading states */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.skeleton {
    background: linear-gradient(90deg, var(--color-light-bg) 25%, #EEEEEE 50%, var(--color-light-bg) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 8px;
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}