/* Nullpointer-Coders – Landingpage */

:root {
  --ink: #0B1F33;
  --paper: #F7F4EF;
  --accent: #C8782A;
  --accent-soft: #E8A85C;
  --muted: #5A6B7A;
  --surface: #142A40;

  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "Source Sans 3", "Helvetica Neue", Helvetica, Arial, sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 3.5rem;
  --space-2xl: 5.5rem;

  --header-h: 4rem;
  --max: 68rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background:
    radial-gradient(ellipse 80% 50% at 100% -10%, rgba(200, 120, 42, 0.12), transparent 55%),
    radial-gradient(ellipse 60% 40% at -10% 20%, rgba(20, 42, 64, 0.08), transparent 50%),
    var(--paper);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

p {
  margin: 0;
}

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

.skip-link {
  position: absolute;
  left: var(--space-md);
  top: -100%;
  z-index: 100;
  padding: var(--space-sm) var(--space-md);
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  border-radius: 0.25rem;
}

.skip-link:focus {
  top: var(--space-sm);
}

/* —— Header —— */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid color-mix(in srgb, var(--ink) 8%, transparent);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  max-width: var(--max);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--ink);
  flex-shrink: 0;
}

.brand-mark__mono {
  flex-shrink: 0;
  color: var(--ink);
}

.brand-mark__name {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.site-nav {
  display: none;
  gap: 1.35rem;
  margin-right: var(--space-md);
}

.site-nav a {
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--muted);
  transition: color 0.25s var(--ease);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--ink);
}

.lang-toggle {
  display: inline-flex;
  margin-left: auto;
  border: 1px solid color-mix(in srgb, var(--ink) 14%, transparent);
  border-radius: 0.3rem;
  overflow: hidden;
}

.lang-toggle__btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.4rem 0.65rem;
  cursor: pointer;
  transition: background 0.25s var(--ease), color 0.25s var(--ease);
}

.lang-toggle__btn[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
}

.lang-toggle__btn:hover:not([aria-pressed="true"]),
.lang-toggle__btn:focus-visible:not([aria-pressed="true"]) {
  color: var(--ink);
}

/* —— Hero —— */

.hero {
  display: grid;
  grid-template-columns: 1fr;
  min-height: calc(100vh - var(--header-h));
  max-width: var(--max);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg) var(--space-2xl);
  gap: var(--space-xl);
  align-items: center;
}

.hero__copy {
  max-width: 34rem;
  animation: rise-in 0.85s var(--ease) both;
}

.hero__brand {
  font-family: var(--font-display);
  font-size: clamp(2.35rem, 5.5vw, 3.75rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin: 0 0 var(--space-md);
}

.hero__title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 500;
  color: var(--accent);
  margin: 0 0 var(--space-md);
}

.hero__lead {
  color: var(--muted);
  font-size: 1.125rem;
  max-width: 32rem;
  margin-bottom: var(--space-lg);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero__visual {
  position: relative;
  min-height: 16rem;
  display: grid;
  place-items: center;
  animation: fade-plane 1.1s var(--ease) 0.15s both;
}

.hero__glow {
  position: absolute;
  inset: 10% 5%;
  background:
    radial-gradient(ellipse at 45% 50%, rgba(200, 120, 42, 0.28), transparent 55%),
    radial-gradient(ellipse at 70% 40%, rgba(11, 31, 51, 0.18), transparent 60%);
  filter: blur(8px);
  pointer-events: none;
}

.hero__plane {
  position: relative;
  width: min(100%, 28rem);
  aspect-ratio: 1.15 / 1;
  display: grid;
  place-items: center;
  background:
    linear-gradient(145deg, var(--surface) 0%, var(--ink) 70%);
  color: var(--paper);
  overflow: hidden;
}

.hero__plane::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, transparent 40%, rgba(232, 168, 92, 0.12) 50%, transparent 60%);
  animation: sheen 7s ease-in-out infinite;
  pointer-events: none;
}

.hero__mono {
  position: relative;
  z-index: 1;
  width: min(55%, 12.5rem);
  height: auto;
  color: var(--paper);
}

/* —— Buttons —— */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.35rem;
  font-family: var(--font-body);
  font-size: 0.975rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0.25rem;
  border: 1.5px solid transparent;
  transition: background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: color-mix(in srgb, var(--accent) 88%, #000);
  border-color: color-mix(in srgb, var(--accent) 88%, #000);
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: color-mix(in srgb, var(--ink) 22%, transparent);
}

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

/* —— Sections —— */

.section {
  padding: var(--space-2xl) 0;
}

.section__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section__eyebrow {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-sm);
}

.section__title {
  font-size: clamp(1.75rem, 3.2vw, 2.35rem);
  margin: 0 0 var(--space-md);
}

.section__intro {
  color: var(--muted);
  max-width: 40rem;
  margin-bottom: var(--space-xl);
  font-size: 1.075rem;
}

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

.section--surface .section__eyebrow {
  color: var(--accent-soft);
}

.section--surface .section__intro {
  color: color-mix(in srgb, var(--paper) 72%, transparent);
}

.section--contact {
  background:
    radial-gradient(ellipse 70% 80% at 90% 20%, rgba(200, 120, 42, 0.14), transparent 50%),
    var(--paper);
}

/* —— Services —— */

.service-list {
  display: grid;
  gap: var(--space-lg) var(--space-xl);
}

.service-list h3 {
  font-size: 1.2rem;
  margin: 0 0 var(--space-xs);
}

.service-list p {
  color: var(--muted);
  max-width: 28rem;
}

.service-list li {
  padding-top: var(--space-md);
  border-top: 1px solid color-mix(in srgb, var(--ink) 12%, transparent);
}

/* —— Stack —— */

.stack-list {
  display: grid;
  gap: var(--space-md);
  max-width: 42rem;
}

.stack-list li {
  padding-left: 1.15rem;
  position: relative;
  color: color-mix(in srgb, var(--paper) 88%, transparent);
  font-size: 1.05rem;
}

.stack-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 0.45rem;
  height: 0.45rem;
  background: var(--accent);
  border-radius: 50%;
}

/* —— Process —— */

.process-list {
  display: grid;
  gap: var(--space-lg);
  max-width: 40rem;
}

.process-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-md);
  align-items: start;
}

.process-list__step {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--accent);
  line-height: 1.2;
  min-width: 2.25rem;
}

.process-list h3 {
  font-size: 1.2rem;
  margin: 0 0 var(--space-xs);
}

.process-list p {
  color: var(--muted);
}

/* —— Contact —— */

.contact-form {
  max-width: 32rem;
  display: grid;
  gap: var(--space-md);
}

.contact-form__field {
  display: grid;
  gap: 0.35rem;
}

.contact-form__field label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink);
}

.contact-form__field input,
.contact-form__field textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.4;
  color: var(--ink);
  background: #fff;
  border: 1.5px solid color-mix(in srgb, var(--ink) 16%, transparent);
  border-radius: 0.25rem;
  padding: 0.7rem 0.85rem;
  transition: border-color 0.25s var(--ease);
}

.contact-form__field textarea {
  resize: vertical;
  min-height: 8rem;
}

.contact-form__field input:focus,
.contact-form__field textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.contact-form__recaptcha {
  min-height: 1.5rem;
}

.contact-form__hint {
  font-size: 0.875rem;
  color: var(--muted);
}

.contact-form__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.contact-form__actions .btn:disabled {
  opacity: 0.65;
  cursor: wait;
  transform: none;
}

.contact-status {
  margin: 0;
  font-size: 0.975rem;
  font-weight: 500;
}

.contact-status--success {
  color: #1f6b3a;
}

.contact-status--error {
  color: #9b2c2c;
}

/* —— Footer —— */

.site-footer {
  border-top: 1px solid color-mix(in srgb, var(--ink) 10%, transparent);
  padding: var(--space-lg) 0;
}

.site-footer__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-lg);
  justify-content: space-between;
  align-items: baseline;
  color: var(--muted);
  font-size: 0.9rem;
}

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

/* —— Motions —— */

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(1.1rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-plane {
  from {
    opacity: 0;
    transform: scale(0.97);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes sheen {
  0%,
  100% {
    transform: translateX(-18%);
    opacity: 0.35;
  }
  50% {
    transform: translateX(18%);
    opacity: 0.7;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hero__copy,
  .hero__visual,
  .hero__plane::after,
  .btn {
    animation: none;
    transition: none;
  }
}

/* —— Desktop —— */

@media (min-width: 768px) {
  .site-nav {
    display: flex;
    margin-left: auto;
  }

  .lang-toggle {
    margin-left: 0;
  }

  .brand-mark__name {
    font-size: 1rem;
  }

  .service-list {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 960px) {
  .hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: var(--space-2xl);
    padding-top: var(--space-2xl);
    padding-bottom: var(--space-2xl);
  }

  .hero__visual {
    min-height: 22rem;
  }

  .hero__plane {
    width: 100%;
  }
}

@media (max-width: 420px) {
  .brand-mark__name {
    font-size: 0.82rem;
  }

  .site-header__inner {
    padding: 0 var(--space-md);
  }

  .hero,
  .section__inner,
  .site-footer__inner {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }
}