:root {
  --color-bg: #ffffff;
  --color-surface: #f7f7f7;
  --color-surface-2: #eeeeee;
  --color-border: #e0e0e0;
  --color-border-hover: #cccccc;
  --color-text: #666666;
  --color-text-light: #999999;
  --color-white: #000000;

  --font-sans: "Inter", "SF Pro Display", system-ui, -apple-system, sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Fira Code", monospace;

  --container-max: 1100px;
  --section-padding: 120px 0;
  --radius: 0px;
  --transition: 0.3s ease;

  --grid-line: rgba(0, 0, 0, 0.05);
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul {
  list-style: none;
}

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

::selection {
  background: #000000;
  color: #ffffff;
}

/* Layout */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 32px;
}

.section {
  padding: var(--section-padding);
}

.section__header {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 64px;
}

.section__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 4px;
  color: var(--color-text-light);
}

.section__title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 500;
  line-height: 1.3;
  color: var(--color-white);
  letter-spacing: -0.02em;
}

/* Trusted by */
.marquee-section {
  padding: 64px 0;
}

.marquee-section__label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 4px;
  color: var(--color-text-light);
  margin-bottom: 32px;
  text-align: center;
}

.marquee {
  position: relative;
  overflow: hidden;
  max-width: 1000px;
  margin: auto;
}

.marquee::before,
.marquee::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 120px;
  z-index: 2;
  pointer-events: none;
}

.marquee::before {
  left: 0;
  background: linear-gradient(to right, var(--color-bg), transparent);
}

.marquee::after {
  right: 0;
  background: linear-gradient(to left, var(--color-bg), transparent);
}

.marquee__track {
  display: flex;
  align-items: center;
  width: max-content;
}

.marquee__track.running {
  animation: marquee-scroll 25s linear infinite;
}

.marquee__track.running:hover {
  animation-play-state: paused;
}

.marquee__item {
  flex-shrink: 0;
  height: 48px;
  width: 150px;
  opacity: 0.5;
  transition: opacity var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 32px;
}

.marquee__item:hover {
  opacity: 1;
}

.marquee__item img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  filter: grayscale(100%);
  transition: filter var(--transition);
}

.marquee__item:hover img {
  filter: grayscale(0%);
}

.marquee__item span {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-white);
  letter-spacing: 1px;
  text-transform: uppercase;
  white-space: nowrap;
}

@keyframes marquee-scroll {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

/* Section divider */
.section-divider {
  position: relative;
  height: 64px;
}

.section-divider::before {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  top: 0;
  bottom: 0;
  width: min(var(--container-max), calc(100% - 64px));
  background-image: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 6px,
    var(--color-border) 6px,
    var(--color-border) 7px
  );
  padding: 12px 0;
  background-clip: content-box;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 14px 36px;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid transparent;
  font-family: var(--font-mono);
}

.btn--primary {
  background-color: var(--color-white);
  color: var(--color-bg);
  border-color: var(--color-white);
}

.btn--primary:hover {
  background-color: var(--color-bg);
  color: #000000;
}

.btn--outline {
  background-color: var(--color-bg);
  color: var(--color-white);
  border-color: var(--color-border-hover);
}

.btn--outline:hover {
  border-color: var(--color-white);
}

.btn--full {
  width: 100%;
  text-align: center;
}

/* Header and nav */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: transparent;
  transition: background-color var(--transition);
}

.header.scrolled {
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav__logo {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-white);
  letter-spacing: 2px;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav__logo-img {
  height: auto;
  width: 200px;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav__link {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-text-light);
  transition: color var(--transition);
  position: relative;
}

.nav__link:hover,
.nav__link.active {
  color: var(--color-white);
}

.nav__link.active::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 1px;
  background-color: var(--color-white);
}

.nav__close {
  display: none;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle span {
  width: 20px;
  height: 1px;
  background-color: var(--color-white);
  transition: all var(--transition);
}

/* Hero */
.hero {
  position: relative;
  min-height: calc(100vh - 200px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 72px;
  background-color: var(--color-bg);
  overflow: hidden;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at center, transparent 0%, var(--color-bg) 70%),
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size:
    100% 100%,
    60px 60px,
    60px 60px;
}

.hero__content {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 900px;
  display: flex;
  align-items: center;
  flex-direction: column;
  gap: 48px;
}

.hero__logo {
  height: auto;
  width: 100%;
  max-width: 100%;
}

/* Logo animation */
.logo-anim {
  position: relative;
  width: 100%;
}

.logo-anim__svg {
  width: 100%;
  display: block;
}

.logo-anim__text {
  opacity: 0;
  animation: logoFadeIn 0.8s ease 0.6s forwards;
}

.logo-anim__x {
  opacity: 0;
  transform-box: fill-box;
  transform-origin: center;
  animation: logoEnterX 1.2s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.logo-anim__line {
  animation: logoExtendLine 0.8s cubic-bezier(0.16, 1, 0.3, 1) 1.4s both;
}

@keyframes logoEnterX {
  0% {
    opacity: 0;
    transform: translate(152%, 0) scale(4) rotate(-360deg);
  }
  30% {
    opacity: 1;
  }
  100% {
    opacity: 1;
    transform: translate(0, 0) scale(1) rotate(0deg);
  }
}

@keyframes logoFadeIn {
  to {
    opacity: 1;
  }
}

@keyframes logoExtendLine {
  from {
    clip-path: inset(0 69.31% 0 30.69%);
  }
  to {
    clip-path: inset(0 0% 0 0%);
  }
}

/* Scroll animation in hero */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.scroll-indicator__mouse {
  width: 24px;
  height: 40px;
  border: 2px solid var(--color-border-hover);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}

.scroll-indicator__ball {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: var(--color-white);
  animation: scroll-ball 1.8s ease-in-out infinite;
}

@keyframes scroll-ball {
  0% {
    transform: translateY(0);
    opacity: 1;
  }
  50% {
    transform: translateY(14px);
    opacity: 0.3;
  }
  100% {
    transform: translateY(0);
    opacity: 1;
  }
}

@media screen and (max-height: 680px) {
  .scroll-indicator {
    display: none;
  }
}

.hero__subtitle {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 4px;
  color: var(--color-text-light);
}

.hero__title {
  font-size: clamp(2.5rem, 5.5vw, 4rem);
  font-weight: 500;
  line-height: 1.1;
  color: var(--color-white);
  letter-spacing: -0.03em;
}

.hero__title em {
  font-style: normal;
  border-bottom: 1px solid var(--color-border-hover);
}

.hero__description {
  font-size: 1rem;
  color: var(--color-text);
  max-width: 480px;
  line-height: 1.8;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  opacity: 0;
  pointer-events: none;
  animation: logoShowActions 0.6s ease 2s forwards;
}

@keyframes logoShowActions {
  to {
    opacity: 1;
    pointer-events: auto;
  }
}

/* About */
.about {
  background-color: var(--color-bg);
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.about__text p {
  color: var(--color-text);
  font-size: 0.95rem;
  line-height: 1.9;
  margin-bottom: 20px;
}

.about__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background-color: var(--color-border);
}

.stat {
  background-color: var(--color-bg);
  padding: 36px;
  text-align: left;
}

.stat__number {
  display: block;
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 300;
  color: var(--color-white);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.stat__number::after {
  content: "+";
  font-weight: 200;
  color: var(--color-text-light);
}

.stat__label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 2px;
}

/* Services */
.services__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
}

.service-card {
  background-color: var(--color-bg);
  padding: 48px 40px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
}

.service-card:hover {
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
  z-index: 10;
}

.service-card__icon {
  font-size: 1.2rem;
  display: block;
  color: var(--color-text-light);
}

.service-card__number {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--color-text-light);
  letter-spacing: 2px;
  display: block;
  transition: color var(--transition);
}

.service-card__title {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--color-white);
  letter-spacing: -0.01em;
  transition: color var(--transition);
}

.service-card__description {
  font-size: 0.85rem;
  color: var(--color-text);
  line-height: 1.8;
  transition: color var(--transition);
}

/* Tech stack */
.tech-stack__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
}

.tech-item {
  background-color: var(--color-bg);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
  position: relative;
}

.tech-item:hover {
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
  z-index: 10;
}

.tech-item__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: grayscale(100%);
  opacity: 0.7;
  transition:
    filter var(--transition),
    opacity var(--transition);
}

.tech-item:hover .tech-item__icon {
  filter: grayscale(0%);
  opacity: 1;
}

.tech-item__icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.tech-item__name {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-white);
  letter-spacing: -0.01em;
  transition: color var(--transition);
}

.tech-item__description {
  font-size: 0.75rem;
  color: var(--color-text);
  line-height: 1.7;
  transition: color var(--transition);
}

@media (max-width: 768px) {
  .tech-stack__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .tech-stack__grid {
    grid-template-columns: repeat(1, 1fr);
  }

  .tech-item {
    padding: 28px 20px;
  }
}

/* Layout */
.team__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
}

.team-card {
  background-color: var(--color-bg);
  overflow: hidden;
  position: relative;
}

.team-card:hover {
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
  z-index: 10;
}

.team-card__image {
  width: 100%;
  height: 260px;
  background-color: var(--color-surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--color-text-light);
  letter-spacing: 2px;
  overflow: hidden;
}

.team-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%);
  transition: filter var(--transition);
}

.team-card:hover .team-card__image img {
  filter: grayscale(0%);
}

.team-card__info {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.team-card__name {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-white);
  transition: color var(--transition);
}

.team-card__role {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--color-text-light);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: color var(--transition);
}

.team-card__bio {
  font-size: 0.8rem;
  color: var(--color-text);
  line-height: 1.7;
  transition: color var(--transition);
}

/* ===========================
   Reviews
   =========================== */
.reviews__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
}

.review-card {
  background-color: var(--color-bg);
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: relative;
}

.review-card:hover {
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
  z-index: 10;
}

.review-card__quote {
  font-size: 0.9rem;
  color: var(--color-text);
  line-height: 1.8;
  transition: color var(--transition);
}

.review-card__author {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.review-card__name {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-white);
  transition: color var(--transition);
}

.review-card__company {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 2px;
  transition: color var(--transition);
}

.review-card__stars {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  letter-spacing: 2px;
  color: var(--color-white);
  transition: color var(--transition);
}

@media (max-width: 768px) {
  .reviews__grid {
    grid-template-columns: 1fr;
  }
}

/* ===========================
   Case Studies
   =========================== */
.case-studies__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
}

.case-study {
  background-color: var(--color-bg);
  overflow: hidden;
  position: relative;
}

.case-study:hover {
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
  z-index: 10;
}

.case-study__image {
  width: 100%;
  height: 280px;
  background-color: var(--color-surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-text-light);
  overflow: hidden;
}

.case-study__image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: grayscale(100%);
  transition: filter var(--transition);
}

.case-study:hover .case-study__image img {
  filter: grayscale(0%);
}

.case-study__body {
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.case-study__client {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 2px;
  transition: color var(--transition);
}

.case-study__title {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--color-white);
  line-height: 1.4;
  letter-spacing: -0.01em;
  transition: color var(--transition);
}

.case-study__description {
  font-size: 0.8rem;
  color: var(--color-text);
  line-height: 1.8;
  transition: color var(--transition);
}

.case-study__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 4px;
}

.case-study__tag {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-text-light);
  border: 1px solid var(--color-border);
  padding: 4px 10px;
  transition: all var(--transition);
}

.case-study:hover .case-study__tag {
  border-color: var(--color-border-hover);
}

@media (max-width: 768px) {
  .case-studies__grid {
    grid-template-columns: 1fr;
  }
}

/* ===========================
   CTA Banner
   =========================== */
.cta {
  padding: 100px 0;
  background-color: #111111;
  position: relative;
  overflow: hidden;
  color: #999999;
}

.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse at 50% 50%,
    rgba(255, 255, 255, 0.05) 0%,
    transparent 70%
  );
  pointer-events: none;
}

.cta .cta__label {
  color: #666666;
}

.cta .cta__title {
  color: #ffffff;
}

.cta .cta__text {
  color: #999999;
}

.cta .btn--primary {
  background-color: #ffffff;
  color: #111111;
  border-color: #ffffff;
}

.cta .btn--primary:hover {
  background-color: transparent;
  color: #ffffff;
}

.cta .cta__grid::before,
.cta .cta__grid::after {
  border-color: #333333;
}

.cta__grid {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 48px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  position: relative;
}

.cta__grid::before,
.cta__grid::after {
  content: "";
  position: absolute;
  width: 24px;
  height: 24px;
  border-color: var(--color-border-hover);
  border-style: solid;
}

.cta__grid::before {
  top: 0;
  left: 0;
  border-width: 1px 0 0 1px;
}

.cta__grid::after {
  bottom: 0;
  right: 0;
  border-width: 0 1px 1px 0;
}

.cta__content {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 560px;
}

.cta__label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 4px;
  color: var(--color-text-light);
}

.cta__title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 500;
  line-height: 1.3;
  color: var(--color-white);
  letter-spacing: -0.02em;
}

.cta__text {
  font-size: 0.9rem;
  color: var(--color-text);
  line-height: 1.8;
}

.cta__action {
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .cta__grid {
    flex-direction: column;
    text-align: center;
    align-items: center;
  }

  .cta {
    padding: 80px 0;
  }
}

/* ===========================
   Contact
   =========================== */

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
}

.form__group {
  margin-bottom: 1px;
}

.form__group input,
.form__group textarea {
  width: 100%;
  padding: 16px 0;
  background-color: transparent;
  border: none;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-white);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  transition: border-color var(--transition);
  outline: none;
}

.form__group input::placeholder,
.form__group textarea::placeholder {
  color: var(--color-text-light);
  font-size: 0.8rem;
  letter-spacing: 0.5px;
}

.form__group input:focus,
.form__group textarea:focus {
  border-color: var(--color-white);
}

.form__group textarea {
  resize: vertical;
  min-height: 100px;
}

.contact__form .btn {
  margin-top: 32px;
}

.form__status {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-white);
  min-height: 1.5em;
  letter-spacing: 0.5px;
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: 36px;
  padding-top: 8px;
}

.contact__item {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.contact__item h4 {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--color-text-light);
}

.contact__item p {
  font-size: 0.95rem;
  color: var(--color-white);
  line-height: 1.7;
}

/* ===========================
   Footer
   =========================== */
.footer {
  background-color: #111111;
  border-top: 1px solid #222222;
  padding: 60px 0 40px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer .nav__logo {
  color: #ffffff;
}

.footer__brand p {
  margin-top: 16px;
  color: #777777;
  font-size: 0.85rem;
  max-width: 300px;
  line-height: 1.7;
}

.footer__links h4 {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: #666666;
  margin-bottom: 20px;
}

.footer__links ul li {
  margin-bottom: 12px;
}

.footer__links ul li a {
  font-size: 0.85rem;
  color: #777777;
  transition: color var(--transition);
}

.footer__links ul li a:hover {
  color: #ffffff;
}

.footer__bottom {
  border-top: 1px solid #222222;
  padding-top: 24px;
  text-align: center;
}

.footer__bottom p {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: #666666;
  letter-spacing: 1px;
  text-transform: uppercase;
}

/* ===========================
   Scroll to Top
   =========================== */
.scroll-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-surface-2);
  border: 1px solid var(--color-border);
  color: var(--color-white);
  cursor: pointer;
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition:
    opacity var(--transition),
    transform var(--transition),
    background-color var(--transition),
    border-color var(--transition);
}

.scroll-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.scroll-top:hover {
  background-color: var(--color-white);
  color: var(--color-bg);
  border-color: var(--color-white);
}

/* ===========================
   Animations
   =========================== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.6s ease,
    transform 0.6s ease;
  transition-delay: var(--stagger, 0s);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 900px) {
  .team__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: var(--color-bg);
    flex-direction: column;
    justify-content: center;
    gap: 24px;
    padding: 40px;
    transition: right var(--transition);
    border-left: 1px solid var(--color-border);
  }

  .nav__menu.open {
    right: 0;
  }

  .nav__close {
    display: block;
    position: absolute;
    top: 24px;
    right: 32px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    width: 20px;
    height: 20px;
  }

  .nav__close span {
    position: absolute;
    width: 20px;
    height: 1px;
    background-color: var(--color-white);
    top: 50%;
    left: 0;
  }

  .nav__close span:first-child {
    transform: rotate(45deg);
  }

  .nav__close span:last-child {
    transform: rotate(-45deg);
  }

  .nav__menu li {
    width: 100%;
  }

  .nav__link {
    font-size: 0.8rem;
    display: block;
    padding: 12px 0;
  }

  .hero__title {
    font-size: clamp(2rem, 8vw, 3rem);
  }

  .about__grid,
  .contact__grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

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

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

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

  .footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .section {
    padding: 80px 0;
  }
}

@media (max-width: 480px) {
  .hero__actions .btn {
    padding: 12px 24px;
    font-size: 0.7rem;
  }

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

  .stat {
    padding: 24px;
  }

  .stat__number {
    font-size: 1.8rem;
  }
}