/* ========================================
   SenzaCodice - Main Stylesheet
   ======================================== */

/* ========================================
   CSS Variables
   ======================================== */
:root {
    --color-bg: #FFFFFF;
    --color-bg-subtle: #FAFAFA;
    --color-text: #1A1A1A;
    --color-text-secondary: #6B6B6B;
    --color-text-tertiary: #9A9A9A;
    --color-accent: #D64045;
    --color-accent-hover: #B8363A;
    --color-border: #EBEBEB;
    --color-border-light: #F5F5F5;
    --color-success: #22C55E;
    
    --font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    --space-3xl: 8rem;
    
    --max-width: 1100px;
    --max-width-narrow: 700px;
    --border-radius: 8px;
    
    --transition-fast: 0.15s ease;
    --transition-normal: 0.2s ease;
    --transition-slow: 0.3s ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
    list-style: none;
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--color-text);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
}

h2 {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
}

h3 {
    font-size: 1.25rem;
}

h4 {
    font-size: 1.1rem;
}

p {
    color: var(--color-text-secondary);
}

.text-small {
    font-size: 0.9rem;
}

.text-large {
    font-size: 1.1rem;
}

.text-muted {
    color: var(--color-text-tertiary);
}

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

/* ========================================
   Layout
   ======================================== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.container-narrow {
    max-width: var(--max-width-narrow);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

section {
    padding: var(--space-3xl) 0;
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

.section-header h2 {
    margin-bottom: var(--space-sm);
}

.section-header p {
    font-size: 1.1rem;
}

/* ========================================
   Navigation
   ======================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-light);
}

.nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
    letter-spacing: -0.03em;
}

.logo span {
    color: var(--color-accent);
}

.nav-links {
    display: flex;
    gap: var(--space-lg);
}

.nav-links a {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition-normal);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-text);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

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

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: 0.75rem 1.5rem;
    font-family: var(--font-family);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--color-text);
    color: var(--color-bg);
}

.btn-primary:hover {
    background: var(--color-accent);
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    border-color: var(--color-text);
    color: var(--color-text);
}

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

.btn-accent:hover {
    background: var(--color-accent-hover);
    transform: translateY(-1px);
}

.btn-text {
    background: transparent;
    color: var(--color-text);
    padding: 0;
}

.btn-text:hover {
    color: var(--color-accent);
}

.btn-text svg {
    transition: transform var(--transition-normal);
}

.btn-text:hover svg {
    transform: translateX(4px);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1rem;
}

/* ========================================
   Cards
   ======================================== */
.card {
    padding: var(--space-lg);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: all var(--transition-normal);
}

.card:hover {
    border-color: var(--color-text-secondary);
}

.card-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-icon svg {
    width: 32px;
    height: 32px;
    stroke: var(--color-accent);
    stroke-width: 1.5;
    fill: none;
}

.card h3 {
    margin-bottom: var(--space-xs);
}

.card p {
    font-size: 0.95rem;
}

.card-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    padding-top: calc(64px + var(--space-3xl));
    padding-bottom: var(--space-2xl);
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 720px;
}

.hero-label {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
    padding: 0.4rem 0.8rem;
    background: rgba(214, 64, 69, 0.08);
    border-radius: 100px;
}

.hero h1 {
    margin-bottom: var(--space-md);
}

.hero p {
    font-size: 1.2rem;
    max-width: 600px;
    margin-bottom: var(--space-lg);
}

.hero-buttons {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

/* ========================================
   Page Header
   ======================================== */
.page-header {
    padding-top: calc(64px + var(--space-2xl));
    padding-bottom: var(--space-xl);
    background: var(--color-bg-subtle);
    border-bottom: 1px solid var(--color-border-light);
}

.page-header h1 {
    margin-bottom: var(--space-sm);
}

.page-header p {
    font-size: 1.2rem;
    max-width: 600px;
}

/* ========================================
   Problem Section
   ======================================== */
.problem {
    background: var(--color-bg-subtle);
    border-top: 1px solid var(--color-border-light);
    border-bottom: 1px solid var(--color-border-light);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.problem-transition {
    text-align: center;
    margin-top: var(--space-xl);
    font-size: 1.1rem;
    color: var(--color-text);
    font-weight: 500;
}

/* ========================================
   Pillars Section
   ======================================== */
.pillars {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.pillar {
    text-align: center;
    padding: var(--space-lg);
}

.pillar-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--color-border);
    border-radius: 50%;
    transition: all var(--transition-slow);
}

.pillar:hover .pillar-icon {
    border-color: var(--color-accent);
}

.pillar-icon svg {
    width: 28px;
    height: 28px;
    stroke: var(--color-text);
    stroke-width: 1.5;
    fill: none;
    transition: stroke var(--transition-slow);
}

.pillar:hover .pillar-icon svg {
    stroke: var(--color-accent);
}

.pillar h3 {
    margin-bottom: var(--space-xs);
}

.pillar p {
    font-size: 0.95rem;
}

/* ========================================
   Method Section
   ======================================== */
.method {
    background: var(--color-bg-subtle);
    border-top: 1px solid var(--color-border-light);
    border-bottom: 1px solid var(--color-border-light);
}

.method-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
}

.method-step {
    position: relative;
    padding: var(--space-lg);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
}

.method-step-number {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-tertiary);
}

.method-step-icon {
    width: 40px;
    height: 40px;
    margin-bottom: var(--space-md);
}

.method-step-icon svg {
    width: 100%;
    height: 100%;
    stroke: var(--color-accent);
    stroke-width: 1.5;
    fill: none;
}

.method-step h3 {
    margin-bottom: var(--space-xs);
}

.method-step p {
    font-size: 0.9rem;
}

/* Method Expanded (for Services page) */
.method-expanded {
    display: grid;
    gap: var(--space-xl);
}

.method-phase {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--space-xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid var(--color-border-light);
}

.method-phase:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.method-phase-header {
    position: relative;
}

.method-phase-number {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: var(--space-xs);
}

.method-phase-header h3 {
    font-size: 1.5rem;
}

.method-phase-content h4 {
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.method-phase-content > p {
    margin-bottom: var(--space-md);
    font-size: 1.05rem;
}

.method-phase-list {
    margin-bottom: var(--space-md);
}

.method-phase-list li {
    position: relative;
    padding-left: var(--space-md);
    margin-bottom: var(--space-xs);
    color: var(--color-text-secondary);
}

.method-phase-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
}

.method-phase-output {
    padding: var(--space-md);
    background: var(--color-bg-subtle);
    border-radius: var(--border-radius);
}

.method-phase-output strong {
    color: var(--color-text);
    font-weight: 600;
}

/* ========================================
   Projects Section
   ======================================== */
.projects-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: var(--space-xl);
}

.projects-header h2 {
    margin-bottom: var(--space-xs);
}

.projects-header > div p {
    color: var(--color-text-tertiary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.project-card {
    padding: var(--space-lg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: all var(--transition-normal);
}

.project-card:hover {
    border-color: var(--color-text-secondary);
    transform: translateY(-2px);
}

/* Project Detail (for Projects page) */
.project-detail {
    padding: var(--space-xl) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.project-detail:last-child {
    border-bottom: none;
}

.project-detail-header {
    margin-bottom: var(--space-md);
}

.project-detail-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
}

.project-detail-section h4 {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-sm);
}

.project-detail-section p {
    font-size: 1rem;
}

.project-detail-meta {
    display: flex;
    gap: var(--space-lg);
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border-light);
}

.project-detail-meta-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.project-detail-meta-item span:first-child {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-tertiary);
}

.project-detail-meta-item span:last-child {
    font-weight: 500;
    color: var(--color-text);
}

/* ========================================
   Services Section
   ======================================== */
.services-grid {
    display: grid;
    gap: var(--space-xl);
}

.service-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    padding: var(--space-xl);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
}

.service-card-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
}

.service-card-content > p {
    margin-bottom: var(--space-md);
}

.service-card-includes h4 {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-sm);
}

.service-card-includes ul {
    margin-bottom: var(--space-md);
}

.service-card-includes li {
    position: relative;
    padding-left: var(--space-md);
    margin-bottom: var(--space-xs);
    color: var(--color-text-secondary);
}

.service-card-includes li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
}

.service-card-ideal {
    padding: var(--space-md);
    background: var(--color-bg-subtle);
    border-radius: var(--border-radius);
}

.service-card-ideal strong {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-xs);
}

.service-card-ideal p {
    font-size: 0.95rem;
    margin: 0;
}

/* ========================================
   Publications Section
   ======================================== */
.book-section {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--space-2xl);
    align-items: start;
}

.book-cover {
    position: relative;
}

.book-cover img {
    width: 100%;
    border-radius: var(--border-radius);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.book-content h2 {
    margin-bottom: var(--space-xs);
}

.book-content .book-subtitle {
    font-size: 1.1rem;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.book-content > p {
    margin-bottom: var(--space-lg);
    font-size: 1.05rem;
}

.book-chapters {
    margin-bottom: var(--space-lg);
}

.book-chapters h3 {
    margin-bottom: var(--space-md);
}

.book-chapter {
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.book-chapter:last-child {
    border-bottom: none;
}

.book-chapter h4 {
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.book-chapter p {
    font-size: 0.9rem;
}

.book-note {
    padding: var(--space-lg);
    background: var(--color-bg-subtle);
    border-radius: var(--border-radius);
    margin-top: var(--space-xl);
}

.book-note p {
    font-size: 0.95rem;
    font-style: italic;
}

/* ========================================
   Contact Section
   ======================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
}

.contact-form {
    background: var(--color-bg);
}

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

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: var(--font-family);
    font-size: 1rem;
    color: var(--color-text);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: border-color var(--transition-normal);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-text);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.form-group-checkbox {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
}

.form-group-checkbox input {
    width: auto;
    margin-top: 4px;
}

.form-group-checkbox label {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-bottom: 0;
}

.form-group-checkbox a {
    color: var(--color-accent);
    text-decoration: underline;
}

.form-submit {
    margin-top: var(--space-lg);
}

.form-message {
    padding: var(--space-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--space-md);
    display: none;
}

.form-message.success {
    background: rgba(34, 197, 94, 0.1);
    color: var(--color-success);
    display: block;
}

.form-message.error {
    background: rgba(214, 64, 69, 0.1);
    color: var(--color-accent);
    display: block;
}

.contact-info h3 {
    margin-bottom: var(--space-md);
}

.contact-info > p {
    margin-bottom: var(--space-lg);
}

.contact-email {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--color-bg-subtle);
    border-radius: var(--border-radius);
    margin-bottom: var(--space-lg);
}

.contact-email svg {
    width: 24px;
    height: 24px;
    stroke: var(--color-accent);
    stroke-width: 1.5;
    fill: none;
}

.contact-email a {
    font-weight: 600;
    color: var(--color-text);
}

.contact-email a:hover {
    color: var(--color-accent);
}

.contact-note {
    padding: var(--space-md);
    border-left: 3px solid var(--color-border);
}

.contact-note p {
    font-size: 0.9rem;
    font-style: italic;
}

/* ========================================
   CTA Section
   ======================================== */
.cta {
    text-align: center;
    background: var(--color-text);
    color: var(--color-bg);
}

.cta h2 {
    color: var(--color-bg);
    margin-bottom: var(--space-sm);
}

.cta p {
    color: rgba(255, 255, 255, 0.7);
    max-width: 500px;
    margin: 0 auto var(--space-lg);
}

.cta .btn-primary {
    background: var(--color-bg);
    color: var(--color-text);
}

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

/* ========================================
   Footer
   ======================================== */
.footer {
    padding: var(--space-xl) 0;
    border-top: 1px solid var(--color-border-light);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-brand p {
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
    margin-top: var(--space-xs);
}

.footer-links {
    display: flex;
    gap: var(--space-lg);
}

.footer-links a {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    transition: color var(--transition-normal);
}

.footer-links a:hover {
    color: var(--color-text);
}

.footer-legal {
    margin-top: var(--space-lg);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border-light);
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
}

.footer-legal-links {
    display: flex;
    gap: var(--space-md);
}

.footer-legal-links a {
    color: var(--color-text-tertiary);
    transition: color var(--transition-normal);
}

.footer-legal-links a:hover {
    color: var(--color-text-secondary);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .service-card {
        grid-template-columns: 1fr;
    }
    
    .book-section {
        grid-template-columns: 250px 1fr;
        gap: var(--space-xl);
    }
    
    .method-phase {
        grid-template-columns: 150px 1fr;
        gap: var(--space-lg);
    }
}

@media (max-width: 900px) {
    .problem-grid,
    .pillars,
    .method-steps {
        grid-template-columns: repeat(2, 1fr);
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .projects-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .book-section {
        grid-template-columns: 1fr;
    }
    
    .book-cover {
        max-width: 250px;
        margin: 0 auto;
    }
    
    .project-detail-content {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .method-phase {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
}

@media (max-width: 600px) {
    :root {
        --space-3xl: 5rem;
        --space-2xl: 4rem;
    }
    
    .nav-links {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--color-bg);
        flex-direction: column;
        padding: var(--space-md);
        gap: 0;
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-links a {
        display: block;
        padding: var(--space-sm) 0;
        border-bottom: 1px solid var(--color-border-light);
    }
    
    .nav-links a:last-child {
        border-bottom: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .problem-grid,
    .pillars,
    .method-steps {
        grid-template-columns: 1fr;
    }
    
    .hero {
        min-height: auto;
        padding-top: calc(64px + var(--space-xl));
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }

    .footer-content {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }

    .footer-legal {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }
    
    .project-detail-meta {
        flex-direction: column;
        gap: var(--space-sm);
    }
}