/**
 * Intervento Tecnico - Impeccable Design System
 * Principi applicati: tipografia distintiva, colori OKLCH, layout con ritmo,
 * animazioni purposeful, evitare AI slop patterns
 */

/* === FONT SELECTION ===
 * Brand voice: "affidabile, rapido, professionale, locale"
 * Scelto: 
 * - Display: "Bebas Neue" (sans-serif condensata, forte impatto, visibile da lontano)
 * - Body: "Source Serif 4" (serif leggibile, affidabile, professionale)
 * - UI: "JetBrains Mono" (monospace tecnica, per numeri telefono e dati)
 */

@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=JetBrains+Mono:wght@400;600&family=Source+Serif+4:ital,wght@0,400;0,600;0,700;1,400&display=swap');

/* === COLOR SYSTEM - OKLCH ===
 * Primary: Rosso-arancio energico (pronto intervento)
 * Neutrals: Tinted verso il primary per coesione
 * Accents: Giallo caldo per CTA
 */
:root {
  /* Primary Brand */
  --color-primary: oklch(55% 0.18 25);
  --color-primary-light: oklch(65% 0.15 25);
  --color-primary-dark: oklch(45% 0.2 25);
  
  /* Accent - CTA */
  --color-accent: oklch(75% 0.15 85);
  --color-accent-dark: oklch(65% 0.18 85);
  
  /* Neutrals - Tinted toward primary (warm) */
  --color-bg: oklch(98% 0.005 25);
  --color-surface: oklch(100% 0.002 25);
  --color-surface-elevated: oklch(100% 0.005 25);
  --color-border: oklch(85% 0.02 25);
  --color-text: oklch(25% 0.02 25);
  --color-text-secondary: oklch(45% 0.03 25);
  --color-text-muted: oklch(60% 0.02 25);
  
  /* Semantic */
  --color-success: oklch(65% 0.15 145);
  --color-warning: oklch(75% 0.12 85);
  --color-error: oklch(55% 0.2 25);
  
  /* Typography Scale - Fluid */
  --font-display: 'Bebas Neue', sans-serif;
  --font-body: 'Source Serif 4', Georgia, serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Type Scale - 1.25 ratio */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.65vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.2rem + 1.5vw, 2rem);
  --text-3xl: clamp(2rem, 1.5rem + 2.5vw, 3rem);
  --text-4xl: clamp(2.5rem, 2rem + 3vw, 4rem);
  --text-5xl: clamp(3rem, 2.5rem + 3.5vw, 5rem);
  
  /* Spacing Scale - 4pt base */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-24: 6rem;     /* 96px */
  
  /* Motion */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
}

/* === BASE STYLES === */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: 1.1;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

h1 {
  font-size: var(--text-5xl);
  margin-bottom: var(--space-6);
}

h2 {
  font-size: var(--text-4xl);
  margin-top: var(--space-16);
  margin-bottom: var(--space-6);
}

h3 {
  font-size: var(--text-3xl);
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
}

h4 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-3);
}

p {
  max-width: 65ch;
  margin-bottom: var(--space-4);
}

/* === HEADER / NAV === */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
  background: color-mix(in oklch, var(--color-surface) 95%, transparent);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
}

.logo {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: 0.05em;
}

.logo img {
  height: 40px;
  width: auto;
}

/* Emergency Banner */
.emergency-banner {
  background: var(--color-primary);
  color: white;
  padding: var(--space-2) 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.05em;
}

.emergency-banner strong {
  font-size: var(--text-lg);
  margin-left: var(--space-2);
}

/* === HERO SECTION === */
.hero {
  background: linear-gradient(135deg, var(--color-bg) 0%, oklch(96% 0.01 25) 100%);
  padding: var(--space-24) 0 var(--space-16);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: oklch(55% 0.1 25 / 0.03);
  transform: rotate(-15deg);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-accent);
  color: var(--color-text);
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-6);
  animation: slideInLeft var(--duration-slow) var(--ease-out-expo);
}

.hero h1 {
  animation: fadeInUp var(--duration-slow) var(--ease-out-expo) 100ms both;
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  max-width: 55ch;
  animation: fadeInUp var(--duration-slow) var(--ease-out-expo) 200ms both;
}

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out-quart);
}

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

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px oklch(45% 0.2 25 / 0.3);
}

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

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

.btn-large {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-xl);
}

/* === CARDS - VARIED LAYOUT === */
/* NO identical card grids - each card type has different treatment */

.service-card {
  background: var(--color-surface);
  padding: var(--space-6);
  transition: all var(--duration-normal) var(--ease-out-quart);
  position: relative;
}

.service-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-primary);
  transform: scaleX(0);
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px oklch(25% 0.02 25 / 0.1);
}

.service-card:hover::after {
  transform: scaleX(1);
}

.service-card h3 {
  font-size: var(--text-xl);
  margin-top: 0;
  margin-bottom: var(--space-3);
}

.service-card p {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
}

/* Feature Cards - Asymmetric */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.feature-card {
  background: var(--color-surface);
  padding: var(--space-8);
  position: relative;
}

.feature-card:nth-child(1) {
  border-top: 4px solid var(--color-primary);
}

.feature-card:nth-child(2) {
  border-left: 4px solid var(--color-accent);
}

.feature-card:nth-child(3) {
  border-bottom: 4px solid var(--color-primary);
}

.feature-card:nth-child(4) {
  border-right: 4px solid var(--color-accent);
}

.feature-icon {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
  display: block;
}

/* === SIDEBAR CARDS === */
.sidebar-card {
  background: var(--color-surface-elevated);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
}

.sidebar-card.emergency {
  background: var(--color-primary);
  color: white;
}

.sidebar-card.emergency h4 {
  color: white;
}

.sidebar-card h4 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}

/* === FAQ === */
.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) 0;
}

.faq-question {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color var(--duration-fast);
}

.faq-question:hover {
  color: var(--color-primary);
}

.faq-toggle {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.faq-item.open .faq-toggle {
  transform: rotate(45deg);
}

/* === FOOTER === */
.site-footer {
  background: var(--color-text);
  color: oklch(85% 0.02 25);
  padding: var(--space-16) 0 var(--space-8);
  margin-top: var(--space-24);
}

.site-footer h4 {
  color: white;
  font-size: var(--text-lg);
  margin-bottom: var(--space-4);
}

.site-footer a {
  color: oklch(75% 0.05 25);
  text-decoration: none;
  transition: color var(--duration-fast);
}

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

/* === STICKY CTA === */
.sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-3) var(--space-4);
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  z-index: 90;
  box-shadow: 0 -4px 20px oklch(25% 0.02 25 / 0.1);
}

/* === ANIMATIONS === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

/* === UTILITY === */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

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

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

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

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .hero {
    padding: var(--space-12) 0 var(--space-8);
  }
  
  h1 {
    font-size: var(--text-4xl);
  }
  
  h2 {
    font-size: var(--text-3xl);
  }
  
  .feature-grid {
    grid-template-columns: 1fr;
  }
  
  .sticky-cta {
    flex-direction: column;
    padding: var(--space-4);
  }
  
  .sticky-cta .btn {
    width: 100%;
    justify-content: center;
  }
}

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

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Selection */
::selection {
  background: var(--color-accent);
  color: var(--color-text);
}