/* ==========================================================================
   Orlando Costi Visuals - Premium Minimalist Portfolio CSS
   ========================================================================== */

/* 1. Design System Tokens */
:root {
    --bg-color: #08080a;
    --bg-card: #121216;
    --text-primary: #f5f5f7;
    --text-secondary: #a0a0a5;
    --text-muted: #6e6e73;
    --accent: #d4af37; /* Elegante oro */
    --accent-hover: #f3cf58;
    --border-color: rgba(255, 255, 255, 0.08);
    --grid-color: rgba(255, 255, 255, 0.02);
    
    /* Font Families */
    --font-serif: 'Playfair Display', Georgia, serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    /* Spacings */
    --container-max-width: 1200px;
    --section-padding: 100px 20px;
    --transition-smooth: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 2. Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
}

body {
    overflow-x: hidden;
    position: relative;
}

/* Background grid overlay */
.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-size: 40px 40px;
    background-image: 
        linear-gradient(to right, var(--grid-color) 1px, transparent 1px),
        linear-gradient(to bottom, var(--grid-color) 1px, transparent 1px);
    z-index: -1;
    pointer-events: none;
}

/* Typography elements */
h1, h2, h3, h4 {
    font-family: var(--font-serif);
    font-weight: 400;
    letter-spacing: -0.02em;
}

p {
    font-size: 1rem;
    color: var(--text-secondary);
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

/* 3. Header & Navigation */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 40px;
    z-index: 100;
    background: rgba(8, 8, 10, 0.7);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-smooth);
}

.logo {
    font-size: 1.2rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    font-family: var(--font-sans);
}

.logo span {
    font-weight: 300;
    color: var(--text-muted);
    margin-left: 8px;
    font-size: 0.95rem;
}

.nav-links {
    display: flex;
    gap: 40px;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
    position: relative;
    padding: 5px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--accent);
    transition: var(--transition-smooth);
}

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

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

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
    padding: 4px;
}

.mobile-menu-btn .bar {
    width: 24px;
    height: 1px;
    background-color: var(--text-primary);
    transition: var(--transition-smooth);
}

/* 4. Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 140px 20px 80px 20px;
    max-width: var(--container-max-width);
    margin: 0 auto;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    animation: fadeIn 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero-tagline {
    font-size: 0.85rem;
    letter-spacing: 0.3em;
    color: var(--accent);
    margin-bottom: 24px;
    font-weight: 500;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.hero-desc {
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    max-width: 600px;
    margin: 0 auto 40px auto;
    font-weight: 300;
}

.hero-cta {
    display: flex;
    gap: 20px;
    justify-content: center;
    align-items: center;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 28px;
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    border-radius: 4px;
    transition: var(--transition-smooth);
    cursor: pointer;
}

.btn-primary {
    background-color: var(--accent);
    color: #000;
    border: 1px solid var(--accent);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(212, 175, 55, 0.15);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: var(--text-primary);
    transform: translateY(-2px);
}

/* 5. Sections Base Styles */
section {
    padding: var(--section-padding);
    max-width: var(--container-max-width);
    margin: 0 auto;
    border-top: 1px solid var(--border-color);
}

.section-header {
    margin-bottom: 60px;
}

.section-label {
    display: block;
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    color: var(--accent);
    margin-bottom: 12px;
    font-weight: 500;
}

.section-title {
    font-size: 2.5rem;
    color: var(--text-primary);
}

/* 6. Projects Section (Typographic & Gradient Cards) */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.project-card {
    display: flex;
    flex-direction: column;
    gap: 20px;
    cursor: pointer;
    group: hover;
}

.project-visual {
    width: 100%;
    aspect-ratio: 16/10;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
    border: 1px solid var(--border-color);
}

/* Clean abstract gradients to replace physical image assets */
.gradient-1 {
    background: linear-gradient(135deg, #1f1f2e 0%, #3e3328 100%);
}
.gradient-2 {
    background: linear-gradient(135deg, #182830 0%, #442a22 100%);
}
.gradient-3 {
    background: linear-gradient(135deg, #1a2a22 0%, #2e243a 100%);
}
.gradient-4 {
    background: linear-gradient(135deg, #222222 0%, #3a321f 100%);
}

.project-number {
    font-family: var(--font-serif);
    font-size: 3rem;
    font-weight: 300;
    color: rgba(255, 255, 255, 0.05);
    transition: var(--transition-smooth);
}

.project-info {
    transition: var(--transition-smooth);
}

.project-category {
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    color: var(--accent);
    text-transform: uppercase;
    font-weight: 500;
    margin-bottom: 6px;
    display: inline-block;
}

.project-name {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.project-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 300;
}

/* Interactive Project Card Hover Effects */
.project-card:hover .project-visual {
    transform: scale(0.98);
    border-color: rgba(212, 175, 55, 0.3);
}

.project-card:hover .project-number {
    color: rgba(212, 175, 55, 0.15);
    transform: scale(1.1);
}

.project-card:hover .project-name {
    color: var(--accent-hover);
}

/* 7. About Section */
.about-content {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 80px;
}

.about-text {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.about-lead {
    font-size: 1.3rem;
    color: var(--text-primary);
    line-height: 1.5;
    font-family: var(--font-serif);
}

.about-text p {
    font-weight: 300;
}

.about-details {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.detail-group h4 {
    font-size: 1.1rem;
    letter-spacing: 0.05em;
    color: var(--text-primary);
    margin-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
    font-family: var(--font-sans);
    font-weight: 500;
}

.detail-group ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.detail-group li {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 300;
    position: relative;
    padding-left: 20px;
}

.detail-group li::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--accent);
}

/* 8. Contact Section */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-lead {
    font-size: 1.4rem;
    color: var(--text-primary);
    font-family: var(--font-serif);
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin: 10px 0;
}

.contact-method-item {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 1rem;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
}

.contact-method-item i {
    font-size: 1.2rem;
    color: var(--accent);
    width: 24px;
}

a.contact-method-item:hover {
    color: var(--text-primary);
}

/* Social links styling */
.social-links {
    display: flex;
    gap: 20px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    transition: var(--transition-smooth);
}

.social-links a:hover {
    color: #000;
    background-color: var(--accent);
    border-color: var(--accent);
    transform: translateY(-3px);
}

/* Form Styles */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
    background: var(--bg-card);
    padding: 40px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-secondary);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 14px;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    background-color: rgba(255, 255, 255, 0.05);
}

/* 9. Footer */
.main-footer {
    padding: 60px 20px;
    text-align: center;
    border-top: 1px solid var(--border-color);
    max-width: var(--container-max-width);
    margin: 0 auto;
}

.main-footer p {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 300;
}

.footer-sub {
    font-size: 0.8rem !important;
    margin-top: 10px;
}

/* 10. Keyframes & Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 11. Media Queries (Responsive) */
@media (max-width: 992px) {
    :root {
        --section-padding: 80px 20px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
        gap: 50px;
    }
}

@media (max-width: 768px) {
    .main-header {
        padding: 20px;
    }
    
    .nav-links {
        display: none; /* Inseriremo gestione mobile JS */
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .hero {
        padding-top: 120px;
    }
    
    /* Navigation Active state for Mobile */
    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 65px;
        left: 0;
        width: 100%;
        height: calc(100vh - 65px);
        background-color: var(--bg-color);
        padding: 40px;
        gap: 30px;
        z-index: 99;
        animation: fadeIn 0.4s ease-out forwards;
    }
    
    .nav-links.active .nav-link {
        font-size: 1.5rem;
        font-family: var(--font-serif);
    }
    
    .mobile-menu-btn.active .bar:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    
    .mobile-menu-btn.active .bar:nth-child(2) {
        transform: translateY(-1px) rotate(-45deg);
    }
}