:root {
    --accent-color: #8B5CF6;
    --font-main: 'Poppins', sans-serif;
    --transition: all 0.3s ease;
    
    /* Dark Theme Default */
    --bg-color: #0F172A;
    --surface-color: #1E293B;
    --surface-hover: #334155;
    --text-primary: #F8FAFC;
    --text-secondary: #CBD5E1;
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-glow: rgba(139, 92, 246, 0.4);
    --modal-bg: #1E293B;
    --nav-bg: rgba(15, 23, 42, 0.8);
    --nav-color: #fff;
    --footer-bg: rgba(15, 23, 42, 0.8);
}

body.light-mode {
    --bg-color: #F8FAFC;
    --surface-color: #FFFFFF;
    --surface-hover: #F1F5F9;
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --border-color: rgba(0, 0, 0, 0.1);
    --shadow-glow: rgba(139, 92, 246, 0.3);
    --modal-bg: #FFFFFF;
    --nav-bg: rgba(255, 255, 255, 0.85);
    --nav-color: #0F172A;
    --footer-bg: rgba(255, 255, 255, 0.85);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
    overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background-color: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background-color: var(--accent-color);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background-color: #A78BFA;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 3rem;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: none;
    z-index: 2000;
    transition: background 0.3s;
}

/* Hamburger button */
.hamburger-btn {
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    transition: var(--transition);
    position: relative;
    z-index: 2100;
}

.hamburger-btn .bar {
    display: block;
    width: 20px;
    height: 2px;
    background-color: var(--accent-color);
    transition: var(--transition);
}

.hamburger-btn.active {
    background-color: var(--accent-color);
}

.hamburger-btn.active .bar {
    background-color: #fff;
    position: absolute;
}

.hamburger-btn.active .bar1 {
    transform: rotate(45deg);
}

.hamburger-btn.active .bar2 {
    opacity: 0;
}

.hamburger-btn.active .bar3 {
    transform: rotate(-45deg);
}

.nav-center {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--nav-color);
    transition: color 0.3s;
}

body.dark-mode .nav-center {
    color: #fff;
}

.nav-right .theme-switch {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--nav-color);
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
}

.theme-switch:hover {
    transform: scale(1.15);
}

body.dark-mode .icon-moon {
    display: none;
}
body.dark-mode .icon-sun {
    display: block;
}

body.light-mode .icon-sun {
    display: none;
}
body.light-mode .icon-moon {
    display: block;
}

/* Full-Screen Overlay Menu */
.overlay-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1500;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
}

.overlay-menu.active {
    opacity: 1;
    pointer-events: auto;
}

.overlay-content {
    text-align: center;
}

.overlay-greeting {
    font-size: 2.5rem;
    color: #fff;
    margin-bottom: 3rem;
    font-weight: 600;
}

.overlay-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.overlay-link {
    text-decoration: none;
    color: #CBD5E1;
    font-size: 2.5rem;
    font-weight: 600;
    transition: color 0.2s;
}

.overlay-link:hover {
    color: var(--accent-color);
}

/* Layout Containers */
main {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 80px;
}

.hero-content-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: 4rem;
}

.hero-text-area {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    max-width: 600px;
}

.main-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
}

.btn {
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    font-family: var(--font-main);
    display: inline-block;
}

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

.btn-primary:hover {
    background-color: transparent;
    color: var(--accent-color);
}

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

.btn-outline:hover {
    background-color: var(--accent-color);
    color: #fff;
}

.hero-image-area {
    display: flex;
    justify-content: center;
    align-items: center;
}

.avatar-container {
    width: 380px;
    height: 380px;
    border-radius: 50%;
    padding: 10px;
    background: linear-gradient(135deg, var(--accent-color), transparent);
    box-shadow: 0 0 40px var(--shadow-glow);
    animation: float 6s ease-in-out infinite;
    flex-shrink: 0;
}

.avatar-img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--bg-color);
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
    100% { transform: translateY(0px); }
}

/* Common Section Styles */
.section-heading {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 3rem;
    color: var(--text-primary);
    text-align: center;
}

.about-section, .skills-section, .projects-section, .contacts-section {
    padding: 6rem 0;
}

/* About Section */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 1.5rem;
}

.skill-card {
    background-color: var(--surface-color);
    border-radius: 24px 8px 8px 8px;
    border-bottom: 4px solid var(--accent-color);
    padding: 2rem 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    transition: var(--transition), opacity 0.8s ease, transform 0.8s ease;
    border-top: 1px solid var(--border-color);
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    /* Initial state for stagger animation */
    opacity: 0;
    transform: translateY(20px);
}

.skill-card.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.skill-card:hover {
    transform: translateY(-8px) !important;
    background-color: var(--surface-hover);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.skill-icon {
    font-size: 3.5rem;
    color: var(--text-primary);
}

.text-icon {
    font-size: 1.5rem;
    font-weight: 700;
    height: 3.5rem;
    display: flex;
    align-items: center;
}

.skill-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.project-card {
    background-color: var(--surface-color);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.2);
    border-color: var(--accent-color);
}

.project-thumb {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.project-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

.project-card:hover .project-thumb img {
    transform: scale(1.05);
}

.project-info {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.project-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.project-tech-icons {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.tech-badge {
    background-color: rgba(139, 92, 246, 0.15);
    color: var(--accent-color);
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
}

.btn-view-more {
    margin-top: auto;
    background: transparent;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    padding: 0.6rem 1rem;
    border-radius: 6px;
    font-family: var(--font-main);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    text-align: center;
}

.btn-view-more:hover {
    background: var(--accent-color);
    color: #fff;
}

/* Contacts Section */
.contacts-row {
    display: flex;
    justify-content: center;
    gap: 4rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.contact-card-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    transition: transform 0.3s ease;
}

.contact-card-link:hover {
    transform: translateY(-8px);
}

.contact-card-link:hover .contact-icon-circle {
    background-color: var(--accent-color);
    color: #fff;
    box-shadow: 0 10px 20px var(--shadow-glow);
}

.contact-icon-circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background-color: var(--surface-color);
    color: var(--accent-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.contact-title {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.contact-value {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Footer Section */
.site-footer {
    padding: 1.5rem 0;
    text-align: center;
    background: var(--footer-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--border-color);
    transition: background 0.3s;
}

.footer-content p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 400;
}

/* Modal System */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    z-index: 2999;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.95);
    background-color: var(--modal-bg);
    border-radius: 16px;
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    z-index: 3000;
    display: none;
    opacity: 0;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
    box-shadow: 0 25px 50px rgba(0,0,0,0.5);
}

.modal.active {
    display: block;
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.modal-overlay.active {
    display: block;
    opacity: 1;
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    background: rgba(0,0,0,0.5);
    color: #fff;
    border: none;
    font-size: 2rem;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
    transition: background 0.2s;
}

.modal-close:hover {
    background: rgba(0,0,0,0.8);
}

/* Tooltip Button (?) */
.modal-info-btn {
    position: absolute;
    top: 15px;
    right: 70px;
    background-color: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    font-size: 1.2rem;
    font-weight: bold;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: help;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: var(--transition);
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}

@media (hover: hover) {
    .modal-info-btn:hover {
        background-color: var(--accent-color);
        color: #fff;
        border-color: var(--accent-color);
        box-shadow: 0 0 15px var(--shadow-glow);
    }
}
.modal-info-btn.active-tooltip {
    background-color: var(--accent-color);
    color: #fff;
    border-color: var(--accent-color);
    box-shadow: 0 0 15px var(--shadow-glow);
}

/* Tooltip Balão (Tooltip) */
.modal-info-btn::after {
    content: attr(data-tooltip);
    position: absolute;
    top: 50px; 
    right: 0;
    width: max-content;
    max-width: 280px;
    background-color: var(--surface-color);
    color: var(--text-primary);
    text-align: left;
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
    font-size: 0.9rem;
    font-weight: 400;
    font-family: var(--font-main);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 100;
    pointer-events: none;
    line-height: 1.5;
}

@media (hover: hover) {
    .modal-info-btn:hover::after {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
}

.modal-info-btn.active-tooltip::after {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.modal-content {
    padding: 0;
    display: flex;
    flex-direction: column;
}

.modal-img {
    width: 100%;
    height: 350px;
    object-fit: cover;
}

.modal-title {
    font-size: 2rem;
    padding: 2rem 2rem 1rem;
    color: var(--text-primary);
}

.modal-desc {
    padding: 0 2rem 1rem;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.modal-features {
    padding: 0 2rem 2rem 3rem;
    color: var(--text-secondary);
}

.modal-features li {
    margin-bottom: 0.5rem;
}

.modal-actions {
    padding: 0 2rem 2rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn-modal {
    background-color: var(--surface-hover);
    color: var(--text-primary);
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.btn-modal:hover {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: #fff;
    transform: translateY(-2px);
}

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.5, 0, 0, 1), transform 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 900px) {
    .hero-content-wrapper {
        flex-direction: column-reverse;
        text-align: center;
        gap: 2rem;
    }

    .hero-text-area {
        align-items: center;
    }

    .main-title {
        font-size: 2.5rem;
    }

    .avatar-container {
        width: 250px;
        height: 250px;
    }

    .navbar {
        padding: 1rem;
    }
}

/* --- Correções para a Modal em Mobile --- */
@media (max-width: 768px) {
    /* 1. Ajustar a altura da imagem para ser mais proporcional num ecrã pequeno */
    .modal-img {
        height: 200px; 
    }

    /* 2. Reduzir os paddings interiores para libertar espaço para o texto e botões */
    .modal-title {
        font-size: 1.5rem;
        padding: 1.5rem 1.5rem 0.5rem;
    }
    
    .modal-desc {
        font-size: 1rem;
        padding: 0 1.5rem 1rem;
    }
    
    .modal-features {
        padding: 0 1.5rem 1.5rem 2.5rem;
    }
    
    .modal-actions {
        padding: 0 1.5rem 1.5rem;
    }

    /* 3. Aumentar o z-index da modal e do fundo escuro para ficarem por cima da navbar (que tem z-index: 2000) */
    .modal-overlay {
        z-index: 2999;
    }
    
    .modal {
        z-index: 3000;
        width: 95%; /* Aproveita melhor a largura do telemóvel */
        max-height: 85vh; /* Dá um pequeno respiro no topo e em baixo */
    }
    
    /* 4. Ajustar posição do balão de informação para não sair do ecrã à esquerda */
    .modal-info-btn::after {
        right: -45px;
        width: 260px;
    }
}