/* ==========================================
   DGCOM CONSULTING - STYLESHEET
   Design professionale con focus accessibilita
   ========================================== */

/* CSS Variables */
:root {
  --color-primary: #0f172a;
  --color-primary-light: #1e293b;
  --color-accent: #0d9488;
  --color-accent-dark: #0f766e;
  --color-accent-light: #ccfbf1;
  --color-text: #1e293b;
  --color-text-light: #475569;
  --color-text-muted: #64748b;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-bg-dark: #0f172a;
  --color-border: #e2e8f0;
  --color-focus: #0ea5e9;
  --color-error: #dc2626;
  --color-success: #16a34a;

  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Space Grotesk', 'Inter', sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

  --transition: 200ms ease;
  --transition-slow: 300ms ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  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;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  background: var(--color-primary);
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  font-weight: 600;
  text-decoration: none;
  transition: top var(--transition);
}

.skip-link:focus {
  top: 0;
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-primary);
  text-wrap: balance;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.125rem, 2vw, 1.5rem); }

p {
  text-wrap: pretty;
  max-width: 65ch;
}

a {
  color: var(--color-accent-dark);
  text-decoration: underline;
  text-underline-offset: 0.15em;
  transition: color var(--transition);
}

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

a:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

strong {
  font-weight: 600;
  color: var(--color-primary);
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* ==========================================
   HEADER
   ========================================== */
.site-header {
  position: sticky;
  top: 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);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--color-primary);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-icon {
  display: flex;
  align-items: center;
  color: var(--color-accent);
}

.logo-accent {
  color: var(--color-accent);
  font-weight: 500;
}

/* Navigation */
.main-nav {
  display: flex;
  align-items: center;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 2px solid transparent;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
}

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

.hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav-link {
  display: inline-block;
  padding: 0.5rem 1rem;
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  transition: background var(--transition), color var(--transition);
}

.nav-link:hover {
  background: var(--color-bg-alt);
  color: var(--color-accent-dark);
}

.nav-link:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 0;
}

.nav-cta {
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
}

.nav-cta:hover {
  background: var(--color-accent-dark);
  color: #fff;
}

/* ==========================================
   HERO
   ========================================== */
.hero {
  position: relative;
  padding: var(--space-2xl) 0;
  background: var(--color-bg-dark);
  color: #fff;
  overflow: hidden;
}

.hero-pattern {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(255,255,255,0.05) 1px, transparent 0);
  background-size: 40px 40px;
  opacity: 0.5;
}

.hero-content {
  position: relative;
  max-width: 680px;
}

.hero-title {
  color: #fff;
  margin-bottom: var(--space-md);
  font-weight: 700;
  line-height: 1.1;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: #94a3b8;
  margin-bottom: var(--space-lg);
  max-width: 100%;
}

.hero-subtitle strong {
  color: #fff;
  font-weight: 600;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

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

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

.btn-primary:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-full {
  width: 100%;
}

/* ==========================================
   STATS
   ========================================== */
.stats {
  padding: var(--space-xl) 0;
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
}

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

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

.stat-number {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--color-accent-dark);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  display: block;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* ==========================================
   SECTION UTILITIES
   ========================================== */
.section-header {
  margin-bottom: var(--space-xl);
  max-width: 640px;
}

.section-header.center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.section-tag {
  display: inline-block;
  padding: 0.375rem 0.875rem;
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
}

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

.section-description {
  font-size: 1.125rem;
  color: var(--color-text-light);
  max-width: 100%;
}

/* ==========================================
   SERVICES
   ========================================== */
.services {
  padding: var(--space-2xl) 0;
}

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

.service-card {
  padding: var(--space-lg);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.service-card:hover,
.service-card:focus {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  outline: none;
}

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

.service-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
}

.service-title {
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
}

.service-desc {
  color: var(--color-text-light);
  font-size: 0.9375rem;
  margin-bottom: var(--space-md);
  max-width: 100%;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  color: var(--color-accent-dark);
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
}

.service-link:hover {
  color: var(--color-accent);
  gap: 0.5rem;
}

/* ==========================================
   WHY US
   ========================================== */
.why-us {
  padding: var(--space-2xl) 0;
  background: var(--color-bg-alt);
}

.why-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.why-lead {
  font-size: 1.125rem;
  color: var(--color-text-light);
  margin-bottom: var(--space-lg);
  max-width: 100%;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.feature-item {
  display: flex;
  gap: var(--space-sm);
}

.feature-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--color-accent);
  color: #fff;
  border-radius: 50%;
  margin-top: 2px;
}

.feature-icon svg {
  width: 16px;
  height: 16px;
}

.feature-text {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.feature-text strong {
  font-weight: 600;
  color: var(--color-primary);
}

.feature-text span {
  color: var(--color-text-light);
  font-size: 0.9375rem;
}

/* Visual cards */
.why-visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  position: relative;
}

.visual-card {
  padding: var(--space-lg);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.visual-card-1 {
  grid-column: 1 / -1;
}

.visual-number {
  display: block;
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-accent-dark);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.visual-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* ==========================================
   PROCESS
   ========================================== */
.process {
  padding: var(--space-2xl) 0;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  counter-reset: step;
}

.process-step {
  position: relative;
  padding-top: var(--space-md);
}

.process-step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 2.5rem;
  right: -1.5rem;
  width: var(--space-md);
  height: 2px;
  background: var(--color-border);
}

.step-number {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-accent-light);
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.step-title {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.step-desc {
  color: var(--color-text-light);
  font-size: 0.9375rem;
  max-width: 100%;
}

/* ==========================================
   CONTACT
   ========================================== */
.contact {
  padding: var(--space-2xl) 0;
  background: var(--color-bg-dark);
  color: #fff;
}

.contact .section-tag {
  background: rgba(13, 148, 136, 0.2);
  color: var(--color-accent-light);
}

.contact .section-title {
  color: #fff;
}

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

.contact-lead {
  font-size: 1.125rem;
  color: #94a3b8;
  margin-bottom: var(--space-lg);
  max-width: 100%;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.contact-method {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: #fff;
  transition: background var(--transition), border-color var(--transition);
}

.contact-method:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
  color: #fff;
}

.contact-method-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--color-accent);
  color: #fff;
  border-radius: var(--radius-md);
}

.contact-method-text {
  display: flex;
  flex-direction: column;
}

.contact-method-label {
  font-size: 0.8125rem;
  color: #94a3b8;
  font-weight: 500;
}

.contact-method-value {
  font-weight: 600;
  font-size: 0.9375rem;
}

/* Contact Form */
.contact-form-wrapper {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
}

.form-label span[aria-label] {
  color: var(--color-accent-dark);
}

.form-input,
.form-select,
.form-textarea {
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
  outline: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-muted);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%23475569' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.form-checkbox {
  flex-direction: row;
  align-items: flex-start;
  gap: 0.75rem;
}

.form-checkbox input[type="checkbox"] {
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 2px;
  accent-color: var(--color-accent);
  cursor: pointer;
}

.form-checkbox label {
  font-size: 0.875rem;
  color: var(--color-text-light);
  cursor: pointer;
}

.form-error {
  display: none;
  font-size: 0.8125rem;
  color: var(--color-error);
  font-weight: 500;
}

.form-error.visible {
  display: block;
}

/* ==========================================
   FOOTER
   ========================================== */
.site-footer {
  padding: var(--space-2xl) 0 0;
  background: var(--color-primary-light);
  color: #cbd5e1;
}

.site-footer .logo {
  color: #fff;
  margin-bottom: var(--space-sm);
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-desc {
  font-size: 0.9375rem;
  color: #94a3b8;
  max-width: 100%;
}

.footer-nav-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: var(--space-md);
}

.footer-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.footer-link {
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color var(--transition);
}

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

.footer-address {
  font-style: normal;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  font-size: 0.9375rem;
}

.footer-address a {
  color: #94a3b8;
  text-decoration: none;
}

.footer-address a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  padding: var(--space-md) 0;
  text-align: center;
  font-size: 0.875rem;
  color: #64748b;
}

/* ==========================================
   TOAST NOTIFICATION
   ========================================== */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  padding: 1rem 1.5rem;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-weight: 500;
  opacity: 0;
  transform: translateY(1rem);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
  z-index: 9999;
  pointer-events: none;
}

.toast.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================
   RESPONSIVE
   ========================================== */
@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-step:not(:last-child)::after {
    display: none;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-sm);
    box-shadow: var(--shadow-lg);
  }

  .nav-list.open {
    display: flex;
  }

  .nav-link {
    width: 100%;
    text-align: center;
    padding: 0.75rem;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg) var(--space-md);
  }

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

  .why-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .why-visual {
    order: -1;
  }

  .process-steps {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .form-row {
    grid-template-columns: 1fr;
  }

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

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .why-visual {
    grid-template-columns: 1fr;
  }

  .visual-card-1 {
    grid-column: auto;
  }
}

/* ==========================================
   REDUCED MOTION
   ========================================== */
@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;
  }

  .toast {
    transition: none;
  }
}

/* ==========================================
   HIGH CONTRAST MODE SUPPORT
   ========================================== */
@media (prefers-contrast: more) {
  :root {
    --color-accent: #006666;
    --color-accent-dark: #004d4d;
    --color-focus: #0000ff;
    --color-border: #000000;
  }

  .service-card,
  .visual-card,
  .contact-method,
  .contact-form-wrapper {
    border-width: 2px;
  }

  .btn {
    border-width: 3px;
  }
}