/* ============================================
   PIXELA — Ultra Modern Minimalist Website
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --font-display: 'Syne', system-ui, sans-serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --accent: #f97316;
  --accent-hover: #fb923c;
}

/* Dark theme (default) */
[data-theme="dark"] {
  --bg: #0b0b0f;
  --bg-surface: #14141a;
  --bg-elevated: #1c1c24;
  --text-primary: #ffffff;
  --text-secondary: #c8c8d0;
  --text-muted: #9090a0;
  --accent-dim: rgba(249, 115, 22, 0.12);
  --border: rgba(255, 255, 255, 0.1);
  --border-hover: rgba(255, 255, 255, 0.25);
  --nav-bg: rgba(11, 11, 15, 0.9);
}

/* Light theme */
[data-theme="light"] {
  --bg: #ffffff;
  --bg-surface: #f4f4f5;
  --bg-elevated: #e9e9ec;
  --text-primary: #111118;
  --text-secondary: #52525b;
  --text-muted: #8888a0;
  --accent-dim: rgba(249, 115, 22, 0.08);
  --border: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(0, 0, 0, 0.2);
  --nav-bg: rgba(255, 255, 255, 0.9);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 17px;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

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

button {
  cursor: pointer;
}

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

/* --- Container --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(1.5rem, 5vw, 4rem);
}

/* --- Utility --- */
.text-accent {
  color: var(--accent);
}

.section-number {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--accent);
  display: block;
  margin-bottom: 0.5rem;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

/* --- Reveal Animation --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

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

/* stagger children */
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem clamp(1.5rem, 5vw, 4rem);
  transition: background 0.4s ease, padding 0.4s ease, backdrop-filter 0.4s ease;
}

.nav--scrolled {
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding-top: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.nav__logo {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--text-primary);
  transition: color 0.3s ease;
  white-space: nowrap;
  flex-shrink: 0;
  margin-right: clamp(1rem, 2vw, 2rem);
}

.nav__logo:hover {
  color: var(--accent);
}

/* Pixel dot — orange square as period after PIXELA */
.pixel-dot {
  display: inline-block;
  width: 5px;
  height: 5px;
  background: var(--accent);
  margin-left: 1px;
  vertical-align: baseline;
}

.nav__right {
  display: flex;
  align-items: center;
  gap: 0;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 12px;
  min-width: 44px;
  min-height: 44px;
  justify-content: center;
  align-items: center;
  z-index: 101;
  margin-left: 1rem;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--text-primary);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav__toggle.is-active span:first-child {
  transform: translateY(3.75px) rotate(45deg);
}

.nav__toggle.is-active span:last-child {
  transform: translateY(-3.75px) rotate(-45deg);
}

.nav__links {
  display: flex;
  gap: clamp(1rem, 2.5vw, 3rem);
}

.nav__links a {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color 0.3s ease;
  position: relative;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s var(--ease-out);
}

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

.nav__links a:hover::after {
  width: 100%;
}

.nav__utils {
  display: flex;
  align-items: center;
  gap: clamp(0.5rem, 1.2vw, 1.25rem);
  margin-left: clamp(0.5rem, 1.5vw, 1.5rem);
}

.nav__theme-toggle {
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: 12px 8px;
  margin: -12px -4px;
  display: flex;
  align-items: center;
  transition: color 0.3s ease;
  min-width: 44px;
  min-height: 44px;
  justify-content: center;
}

.nav__theme-toggle:hover {
  color: var(--accent);
}

/* Show sun in dark mode, moon in light mode */
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="light"] .icon-sun { display: none; }

.nav__separator {
  width: 1px;
  height: 16px;
  background: var(--border-hover);
}

.nav__lang {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  transition: color 0.3s ease;
  padding: 12px 0;
  min-height: 44px;
  display: flex;
  align-items: center;
}

.nav__lang:hover {
  color: var(--accent);
}

/* no underline on utils */
.nav__lang::after,
.nav__theme-toggle::after {
  display: none !important;
}

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 70%);
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 1.5rem;
}

.hero__label {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2rem;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.hero__title-line {
  display: block;
}

.hero__title-line--italic {
  font-style: normal;
  color: var(--accent);
}

.hero__subtitle {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  font-weight: 400;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto 2.5rem;
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--text-primary);
  padding: 1rem 2.2rem;
  border: 1.5px solid var(--border-hover);
  border-radius: 0;
  transition: all 0.4s var(--ease-out);
}

.hero__cta:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
  gap: 1rem;
}

.hero__cta svg {
  transition: transform 0.4s var(--ease-out);
}

.hero__cta:hover svg {
  transform: translateX(4px);
}

.hero__scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
}

.hero__scroll-arrow {
  color: var(--accent);
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { opacity: 0.5; transform: translateY(0); }
  50% { opacity: 1; transform: translateY(8px); }
}

/* ============================================
   ABOUT
   ============================================ */
.about {
  padding: clamp(6rem, 12vw, 10rem) 0;
  border-top: 1px solid var(--border);
}

.about__grid {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 4rem;
  align-items: start;
}

.about__heading {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.about__text {
  font-size: 1.1rem;
  font-weight: 400;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 580px;
}

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

/* ============================================
   SERVICES
   ============================================ */
.services {
  padding: clamp(6rem, 12vw, 10rem) 0;
  border-top: 1px solid var(--border);
}

.services__header {
  margin-bottom: 4rem;
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  background: var(--border);
}

.service-card {
  background: var(--bg);
  padding: clamp(2rem, 4vw, 3rem);
  transition: background 0.4s ease;
}

.service-card:hover {
  background: var(--bg-surface);
}

.service-card__number {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin-bottom: 2rem;
}

.service-card__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.5vw, 1.8rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.25rem;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.service-card__desc {
  font-size: 1.05rem;
  font-weight: 400;
  line-height: 1.7;
  color: var(--text-secondary);
}

.service-card__line {
  width: 30px;
  height: 2px;
  background: var(--accent);
  margin-top: 2rem;
  transition: width 0.4s var(--ease-out);
}

.service-card:hover .service-card__line {
  width: 60px;
}

/* ============================================
   PRINCIPLES
   ============================================ */
.principles {
  padding: clamp(6rem, 12vw, 10rem) 0;
  border-top: 1px solid var(--border);
}

.principles__header {
  margin-bottom: 4rem;
}

.principles__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem 3rem;
}

.principle__title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.6rem;
}

.principle__desc {
  font-size: 1.05rem;
  font-weight: 400;
  line-height: 1.7;
  color: var(--text-secondary);
}

.principle__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.principle__tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  letter-spacing: 0;
}

@media (max-width: 900px) {
  .principles__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .principles__grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   CLIENTS
   ============================================ */
.clients {
  padding: clamp(6rem, 12vw, 10rem) 0;
  border-top: 1px solid var(--border);
}

.clients__header {
  margin-bottom: 3rem;
}

.clients__intro {
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  max-width: 500px;
}

.clients__list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem 0;
}

.client-name {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  padding: 0 1.5rem;
  color: var(--text-primary);
}

.client-name:first-child {
  padding-left: 0;
}

.client-name--muted {
  color: var(--text-muted);
  font-style: italic;
}

.client-separator {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.5;
  flex-shrink: 0;
}

/* ============================================
   TESTIMONIALS (inside clients section)
   ============================================ */
.testimonials__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-top: 4rem;
}

.testimonial {
  border: none;
  padding: clamp(2rem, 4vw, 2.5rem);
  background: var(--bg-surface);
  border-left: 3px solid var(--accent);
  transition: border-color 0.4s ease, background 0.4s ease;
}

.testimonial:hover {
  background: var(--bg-elevated);
}

.testimonial__mark {
  font-family: var(--font-body);
  font-size: 3.5rem;
  line-height: 1;
  color: var(--accent);
  opacity: 0.5;
  margin-bottom: 0.5rem;
  user-select: none;
}

.testimonial__text {
  font-family: var(--font-body);
  font-size: clamp(1.1rem, 1.6vw, 1.25rem);
  font-weight: 400;
  font-style: italic;
  line-height: 1.6;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.testimonial__author {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.testimonial__name {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-primary);
}

.testimonial__role {
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-secondary);
}

/* ============================================
   CONTACT
   ============================================ */
.contact {
  padding: clamp(8rem, 15vw, 14rem) 0;
  border-top: 1px solid var(--border);
}

.contact__content {
  max-width: 600px;
}

.contact__heading {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-top: 3rem;
  margin-bottom: 2.5rem;
  color: var(--text-primary);
}

.contact__flow {
  font-size: 1.05rem;
  font-weight: 400;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: 520px;
}

.contact__channels {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.contact__email,
.contact__phone {
  display: inline-block;
  padding: 0.5rem 0;
  border-bottom: 2px solid var(--border-hover);
  transition: border-color 0.3s ease;
  width: fit-content;
}

.contact__email:hover,
.contact__phone:hover {
  border-bottom-color: var(--accent);
}

.contact__email-address,
.contact__phone-number {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--text-primary);
  transition: color 0.3s ease;
}

.contact__email:hover .contact__email-address,
.contact__phone:hover .contact__phone-number {
  color: var(--accent);
}

.contact__info {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.contact__dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--text-muted);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
}

.footer__content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer__copy {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.03em;
}

.footer__top {
  display: flex;
  align-items: center;
  color: var(--text-secondary);
  transition: color 0.3s ease, transform 0.3s ease;
}

.footer__top:hover {
  color: var(--accent);
  transform: translateY(-2px);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 900px) {
  .about__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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

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

  .clients__list {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .client-separator {
    display: none;
  }

  .client-name {
    padding: 0;
  }
}

@media (max-width: 900px) {
  .nav__toggle {
    display: flex;
  }

  .nav__links {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    height: 100dvh;
    background: var(--bg);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease;
  }

  .nav__links.is-open {
    opacity: 1;
    visibility: visible;
  }

  .nav__links a {
    font-size: 1.3rem;
    letter-spacing: 0.15em;
  }

  .nav__logo {
    margin-right: 0;
  }

  .nav__utils {
    margin-left: auto;
    gap: 1rem;
  }

  .nav__utils .nav__separator {
    display: none;
  }

  .nav__lang {
    font-size: 0;
  }

  .nav__lang::before {
    content: attr(data-short);
    font-size: 0.8rem;
  }

  .hero__title {
    font-size: clamp(2rem, 9vw, 3.5rem);
  }

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

  .contact__info {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
  }

  .contact__dot {
    display: none;
  }

  .footer__content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

/* --- Selection --- */
::selection {
  background: var(--accent);
  color: var(--bg);
}

/* --- Focus visible --- */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}