/* =========================================================================
   Alpine Security Davos — "Alpine Light / Refined"
   Bright, airy, editorial Swiss landing page.
   Palette: stone white bg, white panels, fir-anthracite dark bands,
   single slate-green accent, thin hairlines, refined serif display.
   ========================================================================= */

/* -------------------------------------------------------------------------
   1. Tokens
   ------------------------------------------------------------------------- */
:root {
  --bg: #F4F2ED;          /* stone white */
  --panel: #FFFFFF;
  --bg-deep: #1C2A24;     /* fir anthracite */
  --line: rgba(28, 42, 36, .14);
  --line-soft: rgba(28, 42, 36, .08);
  --text: #1C2A24;
  --muted: #5C6660;
  --accent: #3E5C50;      /* slate green — single accent */
  --accent-ink: #2E463C;

  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;

  --container: 1200px;
  --gutter: clamp(20px, 5vw, 56px);
  --radius: 4px;

  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* -------------------------------------------------------------------------
   2. Reset / base
   ------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

h1, h2, h3, h4 { margin: 0; font-weight: 400; }

ul, ol { margin: 0; padding: 0; list-style: none; }

button { font: inherit; cursor: pointer; }

::selection { background: var(--accent); color: #fff; }

/* Focus visibility — subtle accent ring, never glowing */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* Skip link */
.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 200;
  background: var(--bg-deep);
  color: #fff;
  padding: 12px 18px;
  border-radius: var(--radius);
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 16px; }

/* -------------------------------------------------------------------------
   3. Shared type helpers
   ------------------------------------------------------------------------- */
.kicker {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1.4rem;
}
.kicker--light { color: #C9D6CE; }

.section__title {
  font-family: var(--serif);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -.01em;
  font-size: clamp(2rem, 1.2rem + 3vw, 3.4rem);
  color: var(--text);
}

.section__sub {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 56ch;
  margin: 1.4rem 0 0;
}

/* -------------------------------------------------------------------------
   4. Buttons
   ------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  font-family: var(--sans);
  font-size: .92rem;
  font-weight: 500;
  letter-spacing: .01em;
  padding: .85em 1.6em;
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: background-color .25s var(--ease),
              color .25s var(--ease),
              border-color .25s var(--ease),
              transform .25s var(--ease);
}
.btn--primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn--primary:hover { background: var(--accent-ink); border-color: var(--accent-ink); }

.btn--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
}
.btn--ghost:hover { border-color: var(--text); }

.btn--block { width: 100%; }

/* -------------------------------------------------------------------------
   5. Header
   ------------------------------------------------------------------------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(244, 242, 237, .82);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background-color .3s var(--ease);
}
.header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(244, 242, 237, .94);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 76px;
}

.brand { display: inline-flex; align-items: center; }
.brand__logo {
  height: 30px;
  width: auto;
  /* logo.png is a WHITE wordmark — invert to dark for the light header */
  filter: invert(1) brightness(.15);
}

/* Nav */
.nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.4vw, 2.2rem);
}
.nav__link {
  position: relative;
  font-size: .95rem;
  color: var(--text);
  padding: .35em 0;
  transition: color .2s var(--ease);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s var(--ease);
}
.nav__link:hover { color: var(--accent); }
.nav__link:hover::after,
.nav__link.is-active::after { transform: scaleX(1); }
.nav__link.is-active { color: var(--accent); }

.nav__cta { margin-left: .4rem; }
.nav__cta::after { display: none; }

/* Hamburger — dark bars, visible on stone-white */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  margin-inline: auto;
  background: var(--text);
  transition: transform .3s var(--ease), opacity .2s var(--ease);
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* -------------------------------------------------------------------------
   6. Hero
   ------------------------------------------------------------------------- */
.hero { padding: clamp(3rem, 6vw, 6rem) 0 clamp(2.5rem, 4vw, 4rem); }
.hero__inner {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
}
.hero__title {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(2.4rem, 1.3rem + 4.4vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -.015em;
  margin: 0 0 1.6rem;
  max-width: 16ch;
}
.hero__lead {
  font-size: 1.18rem;
  color: var(--muted);
  max-width: 40ch;
  margin: 0 0 2.2rem;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 1rem; }

.hero__media {
  position: relative;
  align-self: stretch;
}
.hero__media img {
  width: 100%;
  height: 100%;
  min-height: 420px;
  max-height: 560px;
  object-fit: cover;
  border-radius: var(--radius);
  /* one soft, realistic editorial shadow on the floating image */
  box-shadow: 0 30px 60px -30px rgba(28, 42, 36, .35);
}
.hero__caption {
  position: absolute;
  left: 18px;
  bottom: 16px;
  margin: 0;
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: #fff;
  background: rgba(28, 42, 36, .55);
  padding: .5em .9em;
  border-radius: 2px;
}

.hero__foot {
  margin-top: clamp(2.5rem, 5vw, 4rem);
  padding-top: 1.8rem;
  border-top: 1px solid var(--line);
}
.hero__slogan {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(1.2rem, .9rem + 1.4vw, 1.7rem);
  color: var(--accent-ink);
  margin: 0;
}

/* -------------------------------------------------------------------------
   7. Section rhythm
   ------------------------------------------------------------------------- */
.section { padding: clamp(4rem, 8vw, 7.5rem) 0; }

.section__head { max-width: 64ch; margin-bottom: clamp(2.5rem, 5vw, 4rem); }

/* -------------------------------------------------------------------------
   8. Services — editorial numbered rows with hairlines
   ------------------------------------------------------------------------- */
.svc-list { border-top: 1px solid var(--line); }
.svc {
  display: grid;
  grid-template-columns: 5rem 1fr 1.4fr;
  gap: clamp(1rem, 4vw, 3rem);
  align-items: baseline;
  padding: clamp(1.6rem, 3vw, 2.6rem) 0;
  border-bottom: 1px solid var(--line);
  transition: padding-left .35s var(--ease);
}
.svc:hover { padding-left: .6rem; }
.svc__index {
  font-family: var(--serif);
  font-size: 1.1rem;
  color: var(--accent);
  letter-spacing: .04em;
}
.svc__title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.4rem, 1rem + 1.4vw, 2rem);
  line-height: 1.15;
  letter-spacing: -.01em;
  position: relative;
}
.svc__title::after {
  content: "";
  position: absolute;
  left: 0; bottom: -.35em;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width .35s var(--ease);
}
.svc:hover .svc__title::after { width: 2.4rem; }
.svc__desc { color: var(--muted); }
.svc__desc p { margin: 0; }
.svc__desc p + p { margin-top: .5rem; }

/* -------------------------------------------------------------------------
   9. Dark band — fir anthracite + alpine photo backdrop
   ------------------------------------------------------------------------- */
.band {
  position: relative;
  background: var(--bg-deep);
  color: #fff;
  padding: clamp(5rem, 10vw, 8.5rem) 0;
  overflow: hidden;
}
.band__media { position: absolute; inset: 0; z-index: 0; }
.band__media img { width: 100%; height: 100%; object-fit: cover; opacity: .42; }
.band__veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to right, rgba(28,42,36,.92) 0%, rgba(28,42,36,.62) 60%, rgba(28,42,36,.4) 100%);
}
.band__inner { position: relative; z-index: 1; max-width: 24ch; }
.band__quote {
  font-family: var(--serif);
  font-weight: 300;
  font-style: italic;
  font-size: clamp(1.8rem, 1.1rem + 3vw, 3.4rem);
  line-height: 1.12;
  letter-spacing: -.01em;
  margin: 0;
  color: #F4F2ED;
}

/* -------------------------------------------------------------------------
   10. About — asymmetric, team.png on stone
   ------------------------------------------------------------------------- */
.about__grid {
  display: grid;
  grid-template-columns: 1fr .95fr;
  gap: clamp(2.5rem, 6vw, 6rem);
  align-items: center;
}
.about__text {
  font-size: 1.1rem;
  color: var(--muted);
  margin: 1.6rem 0 2rem;
  max-width: 52ch;
}
.checklist { margin: 0 0 2.2rem; display: grid; gap: .9rem; }
.checklist li {
  position: relative;
  padding-left: 1.9rem;
  color: var(--text);
}
.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .55em;
  width: 14px;
  height: 8px;
  border-left: 1.5px solid var(--accent);
  border-bottom: 1.5px solid var(--accent);
  transform: rotate(-45deg);
}
.about__media {
  margin: 0;
  background: linear-gradient(180deg, #FFFFFF 0%, #ECE9E1 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1.2rem, 3vw, 2.4rem);
}
.about__media img { width: 100%; height: auto; }

/* -------------------------------------------------------------------------
   11. Einsätze — editorial mosaic gallery
   ------------------------------------------------------------------------- */
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 240px;
  gap: clamp(.8rem, 1.6vw, 1.4rem);
}
.gallery__item { margin: 0; overflow: hidden; border-radius: var(--radius); }
.gallery__item img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .7s var(--ease);
}
.gallery__item:hover img { transform: scale(1.04); }
.gallery__item--tall { grid-row: span 2; }
.gallery__item--wide { grid-column: span 2; }

/* -------------------------------------------------------------------------
   12. Contact
   ------------------------------------------------------------------------- */
.contact__grid {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: clamp(2.5rem, 6vw, 6rem);
  align-items: start;
}
.contact__list { margin-top: 2.4rem; border-top: 1px solid var(--line); }
.contact__list li {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: 1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}
.contact__lbl {
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
}
.contact__list a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }

/* Form */
.contact__form {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1.6rem, 4vw, 2.6rem);
}
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.field { margin-bottom: 1.2rem; }
.field label {
  display: block;
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: .55rem;
}
.field input,
.field select,
.field textarea {
  width: 100%;
  font: inherit;
  font-size: 1rem;
  color: var(--text);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .8em .95em;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.field textarea { resize: vertical; min-height: 120px; }
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  /* subtle accent focus ring, not glowing */
  box-shadow: 0 0 0 3px rgba(62, 92, 80, .14);
}
.field input::placeholder,
.field textarea::placeholder { color: #9aa39d; }

.form-note { margin: 1rem 0 0; font-size: .92rem; min-height: 1.2em; }
.form-note.is-ok { color: var(--accent); }
.form-note.is-err { color: #b4452f; }

/* -------------------------------------------------------------------------
   13. Footer — dark fir
   ------------------------------------------------------------------------- */
.footer {
  background: var(--bg-deep);
  color: #C9D2CC;
  padding-top: clamp(3.5rem, 6vw, 5rem);
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: clamp(2rem, 4vw, 3.5rem);
  padding-bottom: 3rem;
}
.footer__logo {
  height: 30px;
  width: auto;
  margin-bottom: 1.2rem;
  /* logo is white — used as-is on dark footer */
}
.footer__tag {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.05rem;
  color: #E5EAE6;
  margin: 0;
  max-width: 28ch;
}
.footer__nav h4 {
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: #8DA197;
  margin-bottom: 1.1rem;
  font-weight: 500;
}
.footer__nav a,
.footer__muted {
  display: block;
  color: #C9D2CC;
  padding: .3em 0;
  font-size: .95rem;
  transition: color .2s var(--ease);
}
.footer__nav a:hover { color: #fff; }
.footer__muted { color: #8DA197; }

.social { display: flex; gap: .8rem; }
.social__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: var(--radius);
  color: #C9D2CC;
  transition: background-color .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}
.social__link svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.6; }
.social__link:hover { background: var(--accent); border-color: var(--accent); color: #fff; }

.footer__bottom { border-top: 1px solid rgba(255, 255, 255, .1); }
.footer__bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding-block: 1.6rem;
  font-size: .85rem;
  color: #8DA197;
}
.footer__legal { display: flex; gap: 1.5rem; }
.footer__legal a:hover { color: #fff; }

/* -------------------------------------------------------------------------
   14. Reveal animation
   ------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* Slight stagger for service rows / gallery feels more editorial */
.svc:nth-child(2) { transition-delay: .04s; }
.svc:nth-child(3) { transition-delay: .08s; }
.svc:nth-child(4) { transition-delay: .12s; }
.svc:nth-child(5) { transition-delay: .16s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

/* -------------------------------------------------------------------------
   15. Responsive
   ------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero__media { order: -1; }
  .hero__media img { min-height: 320px; max-height: 420px; }
  .hero__title { max-width: 20ch; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  /* Mobile nav: slide-down panel */
  .nav-toggle { display: flex; }
  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: .5rem var(--gutter) 1.4rem;
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity .28s var(--ease), transform .28s var(--ease), visibility .28s;
  }
  .nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
  }
  .nav__link {
    padding: .9em 0;
    border-bottom: 1px solid var(--line-soft);
  }
  .nav__link::after { display: none; }
  .nav__cta {
    margin: 1rem 0 0;
    width: 100%;
  }

  .svc {
    grid-template-columns: 3rem 1fr;
    grid-template-areas:
      "idx title"
      "idx desc";
    row-gap: .8rem;
  }
  .svc__index { grid-area: idx; }
  .svc__title { grid-area: title; }
  .svc__desc { grid-area: desc; }
  .svc:hover { padding-left: 0; }

  .about__grid { grid-template-columns: 1fr; }
  .about__media { order: -1; max-width: 480px; }

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

  .gallery {
    grid-template-columns: 1fr 1fr;
    grid-auto-rows: 200px;
  }
  .gallery__item--wide { grid-column: span 2; }
  .gallery__item--tall { grid-row: span 1; }
}

@media (max-width: 600px) {
  body { font-size: 16px; }
  .hero__actions { flex-direction: column; align-items: stretch; }
  .hero__actions .btn { width: 100%; }
  .field-row { grid-template-columns: 1fr; gap: 0; }
  .contact__list li { grid-template-columns: 1fr; gap: .25rem; }
  .footer__grid { grid-template-columns: 1fr; }
  .footer__bottom-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 380px) {
  :root { --gutter: 18px; }
  .gallery { grid-template-columns: 1fr; grid-auto-rows: 220px; }
  .gallery__item--wide { grid-column: span 1; }
  .brand__logo { height: 26px; }
}