/* ============================================
   MAIN.CSS — Design system, reset, layout base
   Dott.ssa Federica Rota · Allergologia Roma
   Direzione B — Calore Nordico · v2.0
   ============================================ */

/* Nota: font self-hosted in assets/fonts/ (GDPR-compliant, no Google Fonts CDN) */

/* --- Custom Properties (Design Tokens) --- */
:root {
  /* Palette */
  --color-primary:        #0a6060;
  --color-primary-dark:   #085050;
  --color-primary-light:  #e8f3f3;
  --color-primary-mid:    #c2dede;
  --color-accent:         #0d9b9b;

  --color-white:          #ffffff;
  --color-bg:             #f7f4ef;
  --color-bg-warm:        #f5f2ed;
  --color-bg-card:        #ede9e2;

  --color-text:           #1a2e2e;
  --color-text-muted:     #5a7272;
  --color-text-light:     #8ba5a5;

  --color-border:         #d4e0e0;
  --color-border-light:   #e8eded;

  --color-card-bg:        #ffffff;
  --color-footer-bg:      #0d2424;
  --color-footer-dark:    #061818;
  --color-footer-text:    #a8c8c8;

  /* Typography */
  --font-sans:    'DM Sans', system-ui, -apple-system, sans-serif;
  --font-display: 'Cormorant Garamond', Georgia, serif;

  --text-xs:   0.6875rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;
  --text-6xl:  3.75rem;

  --font-light:    300;
  --font-normal:   400;
  --font-medium:   500;
  --font-semibold: 600;
  --font-bold:     700;

  --leading-tight:   1.1;
  --leading-snug:    1.3;
  --leading-normal:  1.5;
  --leading-relaxed: 1.75;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-14: 3.5rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-22: 5.5rem;
  --space-24: 6rem;

  /* Layout */
  --max-width:    1200px;
  --max-width-sm: 720px;
  --max-width-md: 960px;
  --gutter:       3.5rem;

  /* Radii */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   14px;
  --radius-xl:   20px;
  --radius-2xl:  28px;
  --radius-full: 9999px;

  /* Shadows — sempre con tinta teal, mai nere */
  --shadow-xs: 0 1px 2px rgba(10,96,96,0.05);
  --shadow-sm: 0 2px 8px rgba(10,96,96,0.06), 0 1px 3px rgba(10,96,96,0.04);
  --shadow-md: 0 6px 20px rgba(10,96,96,0.10), 0 2px 6px rgba(10,96,96,0.06);
  --shadow-lg: 0 16px 48px rgba(10,96,96,0.12), 0 4px 12px rgba(10,96,96,0.06);
  --shadow-xl: 0 24px 64px rgba(10,96,96,0.14);

  /* Transitions */
  --transition:        220ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow:   400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 300ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Header */
  --header-height: 68px;
}

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

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

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

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--color-primary-dark); }

ul, ol { list-style: none; }

button {
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.container--sm { max-width: var(--max-width-sm); }
.container--md { max-width: var(--max-width-md); }

/* --- Tipografia --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  color: var(--color-text);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.6rem, 5.5vw, 3.75rem); font-weight: var(--font-bold); }
h2 { font-size: clamp(1.9rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.4rem); font-weight: var(--font-medium); }
h4 { font-size: var(--text-xl); }

p { line-height: var(--leading-relaxed); }

/* --- Sezioni --- */
.section {
  padding-top: var(--space-22);
  padding-bottom: var(--space-22);
}

.section--sm {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

.section-label {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.section-header {
  margin-bottom: var(--space-16);
}

/* --- Bottoni --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.8rem 1.75rem;
  border-radius: var(--radius-full);
  font-family: var(--font-sans);
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
  letter-spacing: 0.01em;
  line-height: 1;
  transition: all var(--transition);
  text-decoration: none;
  cursor: pointer;
  border: 1.5px solid transparent;
  white-space: nowrap;
}

.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
  box-shadow: 0 4px 16px rgba(10,96,96,0.28);
}
.btn--primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(10,96,96,0.38);
}
.btn--primary:active { transform: translateY(0); }

.btn--secondary {
  background-color: transparent;
  color: var(--color-primary);
  border-color: rgba(10,96,96,0.3);
}
.btn--secondary:hover {
  background-color: rgba(10,96,96,0.06);
  border-color: rgba(10,96,96,0.6);
  color: var(--color-primary-dark);
}

.btn--ghost {
  background-color: rgba(255,255,255,0.1);
  color: var(--color-white);
  border-color: rgba(255,255,255,0.22);
  backdrop-filter: blur(8px);
}
.btn--ghost:hover {
  background-color: rgba(255,255,255,0.18);
  color: var(--color-white);
  border-color: rgba(255,255,255,0.45);
}

.btn--lg { padding: 1rem 2.25rem; font-size: var(--text-base); }
.btn--sm { padding: 0.5rem 1.1rem; font-size: var(--text-xs); }

/* --- Utilities --- */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-3) var(--space-6);
  z-index: 9999;
  font-weight: var(--font-semibold);
  border-radius: 0 0 var(--radius-md) 0;
}
.skip-link:focus { top: 0; }

.text-center   { text-align: center; }
.text-muted    { color: var(--color-text-muted); }
.text-sm       { font-size: var(--text-sm); }
.text-lg       { font-size: var(--text-lg); }
.font-semibold { font-weight: var(--font-semibold); }

/* --- Animazioni --- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.7); }
}

.animate-fade-up {
  animation: fadeUp 0.65s cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  :root { --gutter: 2.5rem; }
}

@media (max-width: 768px) {
  :root {
    --gutter:   1.5rem;
    --space-22: 4rem;
    --space-24: 4rem;
    --space-20: 3.5rem;
    --space-16: 3rem;
  }
  .section {
    padding-top: var(--space-16);
    padding-bottom: var(--space-16);
  }
}