/* izai.tech — elite dark landing */
:root {
  --bg: #060606;
  --bg-elevated: #0b0b0c;
  --bg-card: #0f0f10;
  --border: rgba(255, 255, 255, 0.07);
  --text: #eceae6;
  --text-muted: #9c9a96;
  --accent: #c42d2d;
  --accent-soft: rgba(196, 45, 45, 0.22);
  --font-sans: "Inter", system-ui, sans-serif;
  --radius: 11px;
  --radius-sm: 7px;
  --header-h: 84px;
  --ease: cubic-bezier(0.33, 1, 0.68, 1);
}

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

html {
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.68;
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  position: relative;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

@media (prefers-reduced-motion: reduce) {
  body::after {
    display: none;
  }
}

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

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

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

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

.skip-link {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.75rem 1.25rem;
  background: var(--text);
  color: var(--bg);
  font-weight: 600;
  border-radius: var(--radius-sm);
  z-index: 10001;
  transition: top 0.2s var(--ease);
}

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

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

.wrap {
  width: min(1120px, calc(100% - 2.5rem));
  margin-inline: auto;
}

.wrap--wide {
  width: min(1180px, calc(100% - 2rem));
}

main {
  position: relative;
  z-index: 2;
}

.text-accent {
  color: var(--accent);
  font-style: normal;
  font-weight: 600;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: linear-gradient(to bottom, rgba(5, 5, 5, 0.92), rgba(5, 5, 5, 0.65) 70%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.site-header.is-scrolled {
  background: rgba(5, 5, 5, 0.88);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--border);
}

.site-header__inner {
  width: min(1120px, calc(100% - 2.5rem));
  margin-inline: auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  text-decoration: none;
  flex-shrink: 0;
}

.brand:focus-visible {
  border-radius: var(--radius-sm);
}

.brand__logo {
  width: auto;
  height: 46px;
}

@media (min-width: 768px) {
  .brand__logo {
    height: 54px;
  }
}

.nav__toggle {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text);
  cursor: pointer;
  font-family: inherit;
}

.nav__toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.25s var(--ease), opacity 0.2s;
}

.nav__toggle-label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (min-width: 768px) {
  .nav__toggle {
    display: none;
  }
}

.nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.25rem 1.25rem;
  transform: translateY(-120%);
  opacity: 0;
  visibility: hidden;
  transition: transform 0.35s var(--ease), opacity 0.25s, visibility 0.35s;
}

.nav__list.is-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

@media (min-width: 768px) {
  .nav__list {
    position: static;
    flex-direction: row;
    align-items: center;
    gap: 2rem;
    padding: 0;
    background: transparent;
    border: 0;
    transform: none;
    opacity: 1;
    visibility: visible;
  }
}

.nav__list a {
  display: block;
  padding: 0.65rem 0;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-muted);
  transition: color 0.2s;
}

.nav__list a:hover {
  color: var(--text);
}

@media (min-width: 768px) {
  .nav__list a {
    padding: 0.35rem 0;
  }
}

.nav__cta {
  margin-top: 0.5rem;
  padding: 0.65rem 1rem !important;
  text-align: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text) !important;
}

@media (min-width: 768px) {
  .nav__cta {
    margin-top: 0;
    margin-left: 0.5rem;
  }
}

.nav__cta:hover {
  border-color: var(--accent);
  color: var(--text) !important;
}

/* Hero */
.hero {
  position: relative;
  min-height: min(92vh, 880px);
  padding-top: calc(var(--header-h) + 4rem);
  padding-bottom: 5rem;
  overflow: hidden;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 71px 71px;
  background-position: -12px 8px;
  mask-image: radial-gradient(ellipse 75% 55% at 38% 28%, black 0%, transparent 72%);
  pointer-events: none;
  transform: rotate(-0.4deg);
  transform-origin: center top;
}

.hero__glow {
  position: absolute;
  top: -18%;
  right: -22%;
  width: 58%;
  max-width: 480px;
  aspect-ratio: 1;
  background: radial-gradient(circle, var(--accent-soft) 0%, transparent 68%);
  filter: blur(48px);
  opacity: 0.52;
  pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
  .hero__glow {
    animation: none !important;
  }
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 36rem;
}

@media (min-width: 900px) {
  .hero__content {
    margin-right: auto;
    margin-left: min(4vw, 3.25rem);
    padding-top: 0.35rem;
    max-width: 33rem;
  }
}

.hero__eyebrow {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  text-transform: lowercase;
  color: var(--text-muted);
  margin: 0 0 1.35rem;
}

.hero__title {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(2.35rem, 5.5vw, 3.75rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
  margin: 0 0 1.5rem;
}

.hero__title-accent {
  color: var(--accent);
}

.hero__lead {
  margin: 0 0 1.35rem;
  color: var(--text-muted);
  font-size: 1.08rem;
  max-width: 34em;
  line-height: 1.72;
}

.hero__detail {
  margin: 0 0 2rem;
  padding: 1.1rem 0 0;
  border-top: 1px solid var(--border);
  max-width: 36rem;
}

.hero__detail p {
  margin: 0 0 0.85rem;
  font-size: 0.9375rem;
  line-height: 1.68;
  color: var(--text-muted);
}

.hero__detail p:last-child {
  margin-bottom: 0;
}

.hero__detail strong {
  color: var(--text);
  font-weight: 600;
}

.hero__lead strong {
  color: var(--text);
  font-weight: 600;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.5rem;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.2s var(--ease);
}

.btn:active {
  transform: scale(0.98);
}

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

.btn--primary:hover {
  background: #9f2424;
  border-color: #9f2424;
  color: #fff;
}

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

.btn--ghost:hover {
  border-color: rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.04);
  color: #fff;
}

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

.btn--whatsapp {
  background: #128c7e;
  color: #fff;
  border-color: #128c7e;
}

.btn--whatsapp:hover {
  background: #0e7267;
  border-color: #0e7267;
  color: #fff;
}

/* Sections */
.section {
  padding: clamp(4rem, 10vw, 6.5rem) 0;
}

.section--tight {
  padding-top: clamp(3rem, 8vw, 5rem);
}

.section--alt {
  background: var(--bg-elevated);
  border-block: 1px solid var(--border);
}

.section--data-volume {
  padding: clamp(3.25rem, 8vw, 5rem) 0;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(183deg, var(--bg) 0%, var(--bg-elevated) 48%, var(--bg) 100%);
}

.data-volume {
  text-align: left;
  max-width: none;
  margin-inline: 0;
}

.data-volume--split {
  display: grid;
  gap: 2rem;
  align-items: end;
}

@media (min-width: 768px) {
  .data-volume--split {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 2rem 3rem;
    align-items: end;
  }
}

.data-volume__meta {
  max-width: 22rem;
}

.data-volume__figure {
  text-align: right;
}

@media (max-width: 767px) {
  .data-volume__figure {
    text-align: left;
  }
}

.data-volume .section__label {
  margin-bottom: 0.65rem;
}

.data-volume__title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  line-height: 1.22;
  letter-spacing: -0.025em;
  margin: 0 0 0.5rem;
}

.data-volume__hint {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--text-muted);
}

.data-volume__counter {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(2.75rem, 9vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  text-decoration: none;
  border-bottom: 3px solid var(--accent);
  display: inline-block;
  padding-bottom: 0.12em;
}

.section__head {
  max-width: 40rem;
  margin-bottom: clamp(2.5rem, 5vw, 3.5rem);
}

.section__head--rule {
  max-width: 46rem;
  padding-left: 1.15rem;
  border-left: 3px solid var(--accent);
  margin-left: -0.25rem;
}

@media (max-width: 600px) {
  .section__head--rule {
    margin-left: 0;
    padding-left: 0.9rem;
  }
}

.section__label {
  display: inline-block;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.section__label--soft {
  text-transform: none;
  letter-spacing: 0.08em;
  font-weight: 500;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.section__title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}

.section__intro {
  margin: 0;
  color: var(--text-muted);
  font-size: 1.0625rem;
}

/* Problem */
.problem-layout {
  display: grid;
  gap: 2.5rem;
}

@media (min-width: 900px) {
  .problem-layout {
    grid-template-columns: 1fr 1.1fr;
    gap: 4rem;
    align-items: start;
  }
}

.problem-flow {
  border: 1px solid var(--border);
  border-radius: 14px 10px 12px 11px;
  padding: 1.75rem 1.5rem;
  background: var(--bg-card);
}

.problem-flow__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.problem-flow__steps li {
  position: relative;
  padding: 0.85rem 0 0.85rem 1.75rem;
  border-left: 2px solid var(--border);
  margin-left: 0.5rem;
  color: var(--text-muted);
}

.problem-flow__steps li::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 50%;
  transform: translateY(-50%);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--text-muted);
}

.problem-flow__steps li:last-child {
  border-left-color: var(--accent);
  color: var(--text);
}

.problem-flow__steps li:last-child::before {
  border-color: var(--accent);
  background: var(--accent);
}

.problem-flow__steps li + li {
  margin-top: 0;
}

.problem-copy {
  max-width: 36rem;
}

.problem-copy p {
  margin: 0 0 1.25rem;
  color: var(--text-muted);
}

.problem-copy p:last-child {
  margin-bottom: 0;
}

/* Cards */
.cards {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 768px) {
  .cards--3 {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
}

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  background: var(--bg);
  transition: border-color 0.25s ease;
}

.card:nth-child(1) {
  border-radius: 12px 14px 10px 12px;
}

.card:nth-child(2) {
  border-radius: 10px 11px 14px 10px;
}

.card:nth-child(3) {
  border-radius: 13px 10px 11px 14px;
}

@media (min-width: 768px) {
  .cards--3 .card:nth-child(2) {
    transform: translateY(1.15rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .cards--3 .card:nth-child(2) {
    transform: none;
  }
}

.section--alt .card {
  background: var(--bg-card);
}

.card:hover {
  border-color: rgba(196, 45, 45, 0.4);
}

.card__num {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--accent);
  display: block;
  margin-bottom: 1rem;
}

.card__title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.2rem;
  margin: 0 0 0.75rem;
  letter-spacing: -0.02em;
}

.card__text {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.98rem;
}

/* Process */
.process {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

@media (min-width: 900px) {
  .process {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
}

.process__step {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.75rem;
  background: var(--bg-card);
}

.process__step:nth-child(1) {
  border-radius: 12px 10px 10px 12px;
}

.process__step:nth-child(2) {
  border-radius: 10px 12px 12px 10px;
}

.process__step:nth-child(3) {
  border-radius: 10px 10px 12px 12px;
}

@media (max-width: 899px) {
  .process__step + .process__step {
    margin-top: -1px;
  }

  .process__step:first-child {
    border-radius: 12px 12px 0 0;
  }

  .process__step:last-child {
    border-radius: 0 0 12px 12px;
  }

  .process__step:nth-child(2) {
    border-radius: 0;
  }
}

.process__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  background: var(--text);
  color: var(--bg);
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
}

.process__title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.35rem;
  margin: 0 0 0.75rem;
}

.process__text {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.98rem;
}

/* Trust */
.section--trust {
  text-align: left;
  padding: clamp(3.5rem, 8vw, 5.25rem) 0;
}

.trust-block {
  max-width: 38rem;
  margin-left: 0;
  margin-right: auto;
  padding-left: 1.75rem;
  position: relative;
}

.trust-block::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.35rem;
  bottom: 0.35rem;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  opacity: 0.85;
}

.trust-quote {
  margin: 0 0 1.75rem;
  max-width: none;
  border: 0;
  padding: 0;
}

.trust-quote p {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: clamp(1.2rem, 2.4vw, 1.55rem);
  line-height: 1.55;
  letter-spacing: -0.018em;
  margin: 0;
  color: var(--text);
}

.trust-tekmer {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.trust-tekmer strong {
  color: var(--text);
}

/* CTA */
.section--cta {
  padding-bottom: clamp(5rem, 12vw, 7rem);
}

.cta-panel {
  display: grid;
  gap: 2rem;
  padding: clamp(2rem, 5vw, 3rem);
  border: 1px solid var(--border);
  border-radius: 18px 10px 14px 12px;
  background: linear-gradient(152deg, var(--bg-card) 0%, var(--bg-elevated) 55%, var(--bg-card) 100%);
  position: relative;
  overflow: hidden;
}

.cta-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

@media (min-width: 768px) {
  .cta-panel {
    grid-template-columns: 1.4fr 1fr;
    align-items: center;
    gap: 3rem;
  }
}

.cta-panel__title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(1.6rem, 3vw, 2rem);
  margin: 0.5rem 0 1rem;
  letter-spacing: -0.02em;
}

.cta-panel__lead {
  margin: 0 0 1.5rem;
  color: var(--text-muted);
}

.cta-panel__phone {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: 0.02em;
}

.cta-panel__actions {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

/* Footer */
.site-footer {
  position: relative;
  z-index: 2;
  padding: 2.5rem 0 3rem;
  border-top: 1px solid var(--border);
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .site-footer__inner {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem 2rem;
  }
}

.site-footer__mark {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

@media (min-width: 640px) {
  .site-footer__mark {
    flex-direction: row;
    align-items: center;
    gap: 1rem;
  }
}

.site-footer__logo {
  height: 24px;
  width: auto;
  opacity: 0.9;
}

.site-footer__domain {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.12em;
  text-transform: lowercase;
}

.site-footer__domain a {
  text-decoration: none;
  color: var(--text-muted);
  transition: color 0.2s;
}

.site-footer__domain a:hover {
  color: var(--accent);
}

.site-footer__copy {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--text-muted);
  max-width: 20rem;
}

@media (min-width: 640px) {
  .site-footer__copy {
    text-align: right;
    max-width: none;
  }
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translate3d(0, 14px, 0);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}