/* Stone Mate — manuale utente (sito statico) */
:root {
  --ink: #12202e;
  --ink-soft: #3a4d5f;
  --muted: #5c7084;
  --paper: #f4f7fa;
  --surface: #ffffff;
  --line: #c8d4e0;
  --teal: #1a9b96;
  --teal-deep: #0f6e6a;
  --teal-glow: #5fd4ce;
  --navy: #0b1a2a;
  --navy-mid: #143049;
  --kbd-bg: #e8eef4;
  --tip-bg: #e6f5f4;
  --tip-border: #9ad4d0;
  --font-display: "Bricolage Grotesque", "Segoe UI", sans-serif;
  --font-body: "Source Sans 3", "Segoe UI", sans-serif;
  --max: 72rem;
  --nav-w: 15.5rem;
  --radius: 0.35rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 4.5rem;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--teal-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

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

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

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 100;
  padding: 0.6rem 1rem;
  background: var(--navy);
  color: #fff;
  border-radius: var(--radius);
  text-decoration: none;
  transition: top 0.2s var(--ease);
}

.skip-link:focus {
  top: 1rem;
}

/* —— Site header (after hero) —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 1.25rem;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.4s var(--ease), opacity 0.35s var(--ease);
}

.site-header.is-visible {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

.site-header__brand img {
  width: 2rem;
  height: 2rem;
  border-radius: 0.4rem;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius);
  cursor: pointer;
}

.site-header__toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.85rem;
  justify-content: flex-end;
  max-width: min(52rem, 70vw);
}

.site-header__toc a {
  font-size: 0.82rem;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
}

.site-header__toc a:hover,
.site-header__toc a[aria-current="true"] {
  color: var(--teal-deep);
}

/* —— Hero —— */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: #eef6f8;
  background:
    radial-gradient(ellipse 70% 55% at 72% 35%, rgba(95, 212, 206, 0.28) 0%, transparent 58%),
    radial-gradient(ellipse 50% 40% at 18% 70%, rgba(26, 155, 150, 0.18) 0%, transparent 55%),
    linear-gradient(165deg, var(--navy) 0%, var(--navy-mid) 48%, #0e2438 100%);
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(95, 212, 206, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(95, 212, 206, 0.07) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 85% 70% at 60% 40%, #000 20%, transparent 75%);
  animation: grid-drift 28s linear infinite;
  pointer-events: none;
}

@keyframes grid-drift {
  from { background-position: 0 0; }
  to { background-position: 48px 48px; }
}

.hero__facet {
  position: absolute;
  width: min(42vw, 28rem);
  height: min(42vw, 28rem);
  right: 8%;
  top: 12%;
  background:
    conic-gradient(from 210deg at 50% 50%,
      transparent 0deg,
      rgba(95, 212, 206, 0.12) 40deg,
      transparent 80deg,
      rgba(26, 155, 150, 0.18) 140deg,
      transparent 200deg,
      rgba(95, 212, 206, 0.1) 280deg,
      transparent 360deg);
  clip-path: polygon(50% 0%, 95% 30%, 78% 95%, 22% 95%, 5% 30%);
  filter: blur(1px);
  animation: facet-pulse 6s ease-in-out infinite;
  pointer-events: none;
}

@keyframes facet-pulse {
  0%, 100% { opacity: 0.55; transform: scale(1) rotate(0deg); }
  50% { opacity: 0.9; transform: scale(1.04) rotate(2deg); }
}

.hero__inner {
  position: relative;
  z-index: 1;
  width: min(100% - 2.5rem, 42rem);
  margin: 0 auto 0 8vw;
  padding: 6rem 0 4.5rem;
}

.hero__brand {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 0 0 1.75rem;
  animation: rise 0.75s var(--ease) both;
}

.hero__brand img {
  width: clamp(4.5rem, 12vw, 6.5rem);
  height: clamp(4.5rem, 12vw, 6.5rem);
  border-radius: 1.15rem;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}

.hero__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 7vw, 4.25rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  color: #fff;
}

.hero__headline {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3.2vw, 1.85rem);
  font-weight: 560;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: #d7ecec;
  max-width: 22ch;
  animation: rise 0.75s var(--ease) 0.08s both;
}

.hero__lead {
  margin: 0 0 2rem;
  font-size: 1.1rem;
  color: #a8c2cc;
  max-width: 36ch;
  animation: rise 0.75s var(--ease) 0.14s both;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  animation: rise 0.75s var(--ease) 0.2s both;
}

@keyframes rise {
  from { opacity: 0.35; transform: translateY(0.85rem); }
  to { opacity: 1; transform: translateY(0); }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.75rem 1.35rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.btn--primary {
  background: var(--teal);
  color: #06201f;
}

.btn--primary:hover {
  background: var(--teal-glow);
  color: #06201f;
}

.btn--ghost {
  background: transparent;
  color: #dff4f2;
  border-color: rgba(95, 212, 206, 0.45);
}

.btn--ghost:hover {
  border-color: var(--teal-glow);
  color: #fff;
}

.hero__scroll {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(168, 194, 204, 0.7);
  animation: rise 0.75s var(--ease) 0.45s both;
}

/* —— Manual layout —— */
.manual {
  display: grid;
  grid-template-columns: var(--nav-w) minmax(0, 1fr);
  gap: 2.5rem;
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
  padding: 2.5rem 0 4rem;
}

.toc {
  position: sticky;
  top: 4.75rem;
  align-self: start;
  max-height: calc(100svh - 5.5rem);
  overflow: auto;
  padding: 0.25rem 0.5rem 0.25rem 0;
}

.toc__title {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.toc ol {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: toc;
}

.toc li {
  margin: 0;
}

.toc a {
  display: block;
  padding: 0.35rem 0.5rem 0.35rem 0;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.92rem;
  border-left: 2px solid transparent;
  padding-left: 0.65rem;
  transition: color 0.15s, border-color 0.15s;
}

.toc a::before {
  counter-increment: toc;
  content: counter(toc) ". ";
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.toc a:hover,
.toc a[aria-current="true"] {
  color: var(--teal-deep);
  border-left-color: var(--teal);
}

.content {
  min-width: 0;
}

.intro {
  margin: 0 0 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--line);
}

.intro h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.intro p {
  margin: 0 0 1rem;
  color: var(--ink-soft);
  max-width: 52ch;
}

.intro ul {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--ink-soft);
}

.intro li {
  margin-bottom: 0.35rem;
}

.chapter {
  margin-bottom: 2.75rem;
  padding-top: 0.5rem;
  scroll-margin-top: 5rem;
  opacity: 0;
  transform: translateY(0.75rem);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}

.chapter.is-inview {
  opacity: 1;
  transform: none;
}

.chapter__num {
  display: block;
  margin-bottom: 0.35rem;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--teal);
}

.chapter h2 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.4vw, 1.65rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.chapter h3 {
  margin: 1.5rem 0 0.65rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 650;
  color: var(--navy-mid);
}

.chapter p,
.chapter li {
  color: var(--ink-soft);
}

.chapter p {
  margin: 0 0 0.85rem;
  max-width: 58ch;
}

.chapter ol,
.chapter ul {
  margin: 0 0 1rem;
  padding-left: 1.2rem;
  max-width: 58ch;
}

.chapter li + li {
  margin-top: 0.3rem;
}

.tip {
  margin: 1rem 0 1.25rem;
  padding: 0.85rem 1rem;
  background: var(--tip-bg);
  border-left: 3px solid var(--teal);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--ink-soft);
  max-width: 58ch;
}

.tip strong {
  color: var(--teal-deep);
}

/* Tables */
.table-wrap {
  margin: 1rem 0 1.35rem;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th,
td {
  text-align: left;
  padding: 0.65rem 0.85rem;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

th {
  background: #eaf1f6;
  color: var(--navy-mid);
  font-weight: 650;
  font-size: 0.88rem;
}

tr:last-child td {
  border-bottom: none;
}

td:first-child {
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}

kbd {
  display: inline-block;
  padding: 0.1em 0.4em;
  font-family: ui-monospace, "Cascadia Code", "Consolas", monospace;
  font-size: 0.86em;
  background: var(--kbd-bg);
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 0.25rem;
  color: var(--ink);
  white-space: nowrap;
}

code {
  font-family: ui-monospace, "Cascadia Code", "Consolas", monospace;
  font-size: 0.9em;
  background: var(--kbd-bg);
  padding: 0.1em 0.35em;
  border-radius: 0.2rem;
}

.toolbar-list {
  display: grid;
  gap: 0.45rem;
  margin: 0 0 1rem;
  padding: 0;
  list-style: none;
  max-width: 58ch;
}

.toolbar-list li {
  display: grid;
  grid-template-columns: 6.5rem 1fr;
  gap: 0.75rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--line);
}

.toolbar-list strong {
  color: var(--teal-deep);
  font-weight: 650;
}

.closing {
  margin-top: 2rem;
  padding: 1.75rem 0 0;
  border-top: 1px solid var(--line);
}

.closing h2 {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
}

.closing ol {
  margin: 0 0 1rem;
  padding-left: 1.2rem;
  color: var(--ink-soft);
}

.closing p {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--teal-deep);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 1.25rem 2rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
  background: #eaf0f5;
}

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

/* —— Responsive —— */
@media (max-width: 900px) {
  .manual {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .toc {
    position: static;
    max-height: none;
    padding: 0;
    margin-bottom: 0.5rem;
  }

  .toc ol {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.15rem 1rem;
  }

  .site-header__toc {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-header.is-menu-open .site-header__toc {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    flex-wrap: nowrap;
    max-width: none;
    max-height: 70svh;
    overflow: auto;
    padding: 0.75rem 1.25rem 1rem;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 12px 24px rgba(18, 32, 46, 0.08);
  }

  .hero__inner {
    margin-left: auto;
    margin-right: auto;
    width: min(100% - 2rem, 36rem);
    padding-top: 5rem;
    text-align: left;
  }

  .hero__facet {
    opacity: 0.45;
    right: -8%;
    top: 0;
  }
}

@media (max-width: 560px) {
  .toc ol {
    grid-template-columns: 1fr;
  }

  .toolbar-list li {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }

  td:first-child {
    white-space: normal;
  }

  .hero__brand {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero__grid,
  .hero__facet,
  .hero__brand,
  .hero__headline,
  .hero__lead,
  .hero__cta,
  .hero__scroll {
    animation: none;
    opacity: 1;
  }
  .chapter {
    opacity: 1;
    transform: none;
    transition: none;
  }
}