/* Rotorpoint Drone Services — one-page site
   Dark, silver, electric blue. Matches official RS logo. */

:root {
  --paper: #07090E;
  --paper-deep: #10131A;
  --ink: #E8EAED;
  --ink-soft: #B4B8C0;
  --muted: #8A909A;
  --copper: #1E6BFF;
  --copper-deep: #3B82FF;
  --line: rgba(232, 234, 237, 0.12);
  --line-strong: rgba(232, 234, 237, 0.24);
  --serif: "Outfit", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --sans: "Outfit", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --header-h: 4.75rem;
  --wrap: 72rem;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 0.75rem);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(1000px 520px at 85% 0%, rgba(30, 107, 255, 0.16), transparent 58%),
    var(--paper);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 1;
  opacity: 0.07;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

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

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--copper-deep);
}

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

::selection {
  background: var(--copper);
  color: var(--ink);
}

main,
.site-footer {
  position: relative;
  z-index: 2;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 60;
  padding: 0.6rem 0.9rem;
  background: #05070C;
  color: var(--ink);
  text-decoration: none;
}

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

.wrap {
  width: min(var(--wrap), 100% - 2 * var(--gutter));
  margin-inline: auto;
}

.eyebrow {
  margin: 0 0 0.85rem;
  color: var(--copper-deep);
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

h1, h2, h3 {
  font-family: var(--serif);
  font-optical-sizing: auto;
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin: 0;
}

h1 {
  font-size: clamp(2.6rem, 7.2vw, 5.6rem);
  font-weight: 400;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.85rem, 3.6vw, 3.15rem);
}

h3 {
  font-size: 1.45rem;
  letter-spacing: -0.015em;
}

p {
  margin: 0;
}

.lede,
.section-head p,
.contact-intro > p,
.band p:last-child {
  color: var(--ink-soft);
  max-width: 36rem;
}

/* Header
   -------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  border-bottom: 1px solid var(--line);
  background: rgba(7, 9, 14, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  width: min(var(--wrap), 100% - 2 * var(--gutter));
  height: 100%;
  margin-inline: auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--ink);
  min-width: 0;
}

.brand:hover {
  color: var(--ink);
}

.brand-mark {
  width: 2.15rem;
  height: 2.15rem;
  flex: none;
  color: var(--ink);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.08rem;
  line-height: 1;
}

.brand-logo {
  height: 2.7rem;
  width: auto;
  flex: none;
}

.brand-point {
  color: var(--copper);
}

.brand-name {
  font-family: var(--sans);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.brand-sub {
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.site-nav a {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
}

.site-nav a:not(.nav-cta) {
  color: var(--ink-soft);
}

.site-nav a:not(.nav-cta):hover {
  color: var(--ink);
}

.nav-cta {
  padding: 0.5rem 0.95rem;
  border: 1px solid var(--copper);
  color: var(--copper-deep);
  letter-spacing: 0.02em;
}

.nav-cta:hover {
  background: var(--copper-deep);
  border-color: var(--copper-deep);
  color: #F4F7FF;
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}

.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  display: block;
  width: 1rem;
  height: 1.5px;
  background: currentColor;
  position: relative;
  margin-inline: auto;
  transition: transform 0.25s var(--ease), opacity 0.2s ease;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle-bars::before { top: -5px; }
.nav-toggle-bars::after { top: 5px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-bars {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after {
  top: 0;
  transform: rotate(-45deg);
}

/* Buttons
   -------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.7rem 1.3rem;
  border: 1px solid transparent;
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.btn-primary {
  background: var(--copper-deep);
  color: #F4F7FF;
  border-color: var(--copper-deep);
}

.btn-primary:hover {
  background: #1554D6;
  border-color: #1554D6;
  color: #F4F7FF;
}

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

.btn-ghost:hover {
  border-color: var(--ink);
  color: var(--ink);
}

/* Hero
   -------------------------------------------------- */

.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  min-height: calc(100svh - var(--header-h));
  display: grid;
  align-items: center;
  padding: clamp(3.5rem, 9vh, 6.5rem) 0 clamp(4.5rem, 10vh, 7.5rem);
  border-bottom: 1px solid var(--line);
}

.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 42rem;
}

.hero .lede {
  margin-top: 1.4rem;
  font-size: 1.125rem;
  max-width: 30rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2.15rem;
}

.hero-grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(to right, rgba(232, 234, 237, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(232, 234, 237, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 80% at 78% 45%, #000 20%, transparent 72%);
  animation: grid-drift 48s linear infinite;
}

.hero-rings {
  position: absolute;
  z-index: 1;
  right: -12%;
  top: 50%;
  width: min(46rem, 92vw);
  transform: translateY(-50%);
  opacity: 0.55;
  pointer-events: none;
}

.rings-svg {
  width: 100%;
  height: auto;
}

.rings-spin {
  transform-origin: 320px 320px;
  animation: slow-spin 80s linear infinite;
}

.rings-accent {
  opacity: 0.85;
}

@keyframes grid-drift {
  from { background-position: 0 0; }
  to { background-position: 48px 24px; }
}

@keyframes slow-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Sections
   -------------------------------------------------- */

.section {
  padding: clamp(4.5rem, 10vw, 7.5rem) 0;
}

.section-head {
  max-width: 38rem;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-head h2 {
  max-width: 18ch;
}

/* Diensten
   -------------------------------------------------- */

.diensten {
  border-bottom: 1px solid var(--line);
}

.service-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
}

.service-card {
  padding: 1.75rem 1.75rem 2rem 0;
  border-right: 1px solid var(--line);
  display: grid;
  align-content: start;
  gap: 0.85rem;
}

.service-card:first-child {
  padding-left: 0;
}

.service-card:last-child {
  border-right: none;
  padding-right: 0;
}

.service-card + .service-card {
  padding-left: 1.75rem;
}

.service-card .index {
  font-family: var(--serif);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--copper-deep);
}

.service-card p {
  color: var(--ink-soft);
  max-width: 28ch;
}

/* Werkwijze
   -------------------------------------------------- */

.werkwijze {
  background:
    linear-gradient(to bottom, transparent, rgba(16, 19, 26, 0.9));
  border-bottom: 1px solid var(--line);
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
  position: relative;
}

.steps::before {
  content: "";
  position: absolute;
  left: 1.05rem;
  right: 1.05rem;
  top: 1.05rem;
  height: 1px;
  background: linear-gradient(to right, var(--copper), var(--line-strong));
}

.steps li {
  position: relative;
  display: grid;
  gap: 0.7rem;
  padding-top: 0.15rem;
}

.step-num {
  width: 2.1rem;
  height: 2.1rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--copper);
  background: #0B0E14;
  font-family: var(--serif);
  font-size: 0.95rem;
  color: var(--copper-deep);
  position: relative;
  z-index: 1;
}

.steps p {
  color: var(--ink-soft);
  max-width: 24ch;
}

/* Werkgebied band
   -------------------------------------------------- */

.band {
  position: relative;
  overflow: hidden;
  padding: clamp(4.5rem, 11vw, 7.25rem) 0;
  background: #05070C;
  color: var(--ink);
}

.band::before,
.band::after {
  content: "";
  position: absolute;
  border: 1px solid rgba(244, 241, 234, 0.12);
  border-radius: 50%;
  pointer-events: none;
}

.band::before {
  width: 28rem;
  height: 28rem;
  right: -8rem;
  top: 50%;
  transform: translateY(-50%);
}

.band::after {
  width: 18rem;
  height: 18rem;
  right: -3rem;
  top: 50%;
  transform: translateY(-50%);
  border-color: rgba(30, 107, 255, 0.45);
}

.band-inner {
  position: relative;
  z-index: 1;
}

.band .eyebrow {
  color: #6EA2FF;
}

.band h2 {
  margin-bottom: 1rem;
  font-weight: 400;
  font-size: clamp(2.4rem, 6vw, 4.6rem);
}

.band p:last-child {
  color: rgba(244, 241, 234, 0.78);
  max-width: 32rem;
  font-size: 1.08rem;
}

/* Contact
   -------------------------------------------------- */

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(2.5rem, 6vw, 5.5rem);
  align-items: start;
}

.contact-intro h2 {
  margin-bottom: 1rem;
}

.contact-channels {
  list-style: none;
  margin: 2.4rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.15rem;
  border-top: 1px solid var(--line);
  padding-top: 1.5rem;
}

.channel-label {
  display: block;
  margin-bottom: 0.2rem;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.contact-channels a {
  color: var(--ink);
  font-weight: 500;
  word-break: break-word;
}

.contact-form {
  display: grid;
  gap: 1.15rem;
  padding: 1.75rem 0 0;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.15rem;
}

.field {
  display: grid;
  gap: 0.4rem;
}

.field label {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.field input,
.field select,
.field textarea {
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--line-strong);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  font-family: inherit;
  font-size: 1.02rem;
  line-height: 1.4;
  padding: 0.55rem 0 0.65rem;
  appearance: none;
}

.field select {
  background-image: linear-gradient(45deg, transparent 50%, var(--ink) 50%),
    linear-gradient(135deg, var(--ink) 50%, transparent 50%);
  background-position: calc(100% - 10px) 54%, calc(100% - 5px) 54%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 1.4rem;
}

.field textarea {
  resize: vertical;
  min-height: 7.5rem;
}

.field input:hover,
.field select:hover,
.field textarea:hover {
  border-bottom-color: var(--ink);
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-bottom-color: var(--copper);
}

.field input:user-invalid,
.field select:user-invalid,
.field textarea:user-invalid {
  border-bottom-color: var(--copper-deep);
}

.form-note {
  min-height: 1.3em;
  font-size: 0.9rem;
  color: var(--muted);
}

.contact-form .btn {
  justify-self: start;
  margin-top: 0.35rem;
}

/* Footer
   -------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.75rem 0 2.25rem;
}

.footer-inner {
  display: grid;
  gap: 0.55rem;
}

.footer-line {
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.footer-line span {
  margin: 0 0.45rem;
  color: var(--muted);
}

.footer-note {
  font-size: 0.82rem;
  color: var(--muted);
}

/* Mobile
   -------------------------------------------------- */

@media (max-width: 860px) {
  .nav-toggle {
    display: grid;
    place-items: center;
    position: relative;
    z-index: 53;
  }

  .brand {
    position: relative;
    z-index: 53;
  }

  .site-nav {
    position: fixed;
    z-index: 51;
    inset: 0 0 auto 0;
    top: 0;
    padding: calc(var(--header-h) + 1rem) var(--gutter) 1.5rem;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    transform: translateY(-110%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.35s var(--ease), opacity 0.25s ease;
  }

  .site-nav.is-open {
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }

  .nav-cta {
    margin-top: 0.4rem;
    background: var(--copper-deep);
    border-color: var(--copper-deep);
    color: #F4F7FF;
    padding: 0.7rem 1.15rem;
  }

  .nav-cta:hover {
    background: #1554D6;
    border-color: #1554D6;
    color: #F4F7FF;
  }

  .hero {
    min-height: 0;
    padding-top: 3.25rem;
  }

  .hero-rings {
    opacity: 0.28;
    right: -40%;
    width: 34rem;
  }

  .service-list,
  .steps,
  .contact-grid,
  .field-row {
    grid-template-columns: 1fr;
  }

  .service-card,
  .service-card + .service-card,
  .service-card:last-child {
    padding: 1.5rem 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .service-card:last-child {
    border-bottom: 0;
  }

  .steps {
    gap: 1.75rem;
  }

  .steps::before {
    display: none;
  }

  .service-card p,
  .steps p {
    max-width: none;
  }
}

@media (max-width: 540px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .footer-line span {
    display: none;
  }

  .footer-line a,
  .footer-line {
    display: block;
  }

  .footer-line a + a {
    margin-top: 0.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-grid,
  .rings-spin {
    animation: none;
  }
  .site-nav {
    transition: none;
  }
}