/* ==============================================
   NADIIA CHERNYGINA — PORTFOLIO STYLESHEET
   style.css
   ============================================== */

/* ── DESIGN TOKENS ──────────────────────────── */
:root {
  --color-bg: #ffffff;
  --color-white: #ffffff;
  --color-border: #e5e1da;
  --color-text: #1c1917;
  --color-text-muted: #6b6560;
  --color-accent: #003d8b;
  --color-accent-pale: #ffffff;

  --font-display: "Cormorant Garamond", Georgia, serif;
  --font-body: "Outfit", system-ui, sans-serif;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;

  --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.06), 0 4px 16px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.07), 0 16px 40px rgba(0, 0, 0, 0.06);
  --shadow-hover:
    0 8px 24px rgba(0, 0, 0, 0.1), 0 24px 56px rgba(0, 0, 0, 0.08);

  --transition: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);

  --max-width: 1120px;
  --side-pad: clamp(1.25rem, 5vw, 3rem);
}

/* ── RESET & BASE ───────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

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

/* ── UTILITIES ──────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--side-pad);
}

.section {
  padding-block: clamp(2rem, 5vw, 3rem);
}

.section__label {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 600;
  line-height: 1.15;
  color: var(--color-text);
  margin-bottom: 3rem;
}

.section__title em,
h1 em,
h2 em {
  font-style: italic;
  color: var(--color-accent);
}

/* ── SCROLL REVEAL ──────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 0.65s var(--transition),
    transform 0.65s var(--transition);
}

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

/* ── BUTTONS ────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 0.85rem 2rem;
  border-radius: 100px;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition:
    background-color var(--transition),
    color var(--transition),
    border-color var(--transition),
    transform var(--transition),
    box-shadow var(--transition);
}

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

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

.btn--primary:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(184, 115, 51, 0.28);
}

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

.btn--ghost:hover {
  border-color: var(--color-text);
  transform: translateY(-2px);
}

/* ── HEADER ─────────────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: transparent;
  transition:
    box-shadow var(--transition),
    backdrop-filter var(--transition);
}

.site-header.scrolled {
  background-color: var(--color-bg);
  box-shadow: 0 1px 0 var(--color-border);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.nav__logo {
  width: 226px;
}

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

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

.nav__list {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.nav__link {
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  position: relative;
  transition: color var(--transition);
}

.nav__link::after {
  content: "";
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1.5px;
  background-color: var(--color-accent);
  transition: width var(--transition);
}

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

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

/* Hamburger */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  min-width: 26px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  margin-left: 30px;
}

.nav__toggle span {
  display: block;
  width: 100%;
  height: 1.5px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition:
    transform var(--transition),
    opacity var(--transition);
  transform-origin: center;
}

.nav__toggle.open span:nth-child(1) {
  transform: translateY(8.25px) rotate(45deg);
}

.nav__toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav__toggle.open span:nth-child(3) {
  transform: translateY(-8.25px) rotate(-45deg);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0;
  min-height: 68px;
}

/* lang-toggle */

.lang-toggle {
  display: flex;
  align-items: center;
}
.lang-btn {
  padding: 7px 13px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--stone);
  transition: all 0.2s;
  cursor: pointer;
  background: none;
  border: none;
  border-radius: 3px;
}
.lang-btn.on {
  background: var(--color-accent);
  color: var(--color-white);
}

/* ── HERO ───────────────────────────────────── */
.hero {
  min-height: 85svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 40px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -10%;
  width: 560px;
  height: 560px;
  background: radial-gradient(
    circle,
    rgba(184, 115, 51, 0.08) 0%,
    transparent 70%
  );
  pointer-events: none;
  border-radius: 50%;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 2rem;
  padding-block: 2rem;
}

.hero__text {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding-top: 10px;
}

.hero__eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--color-accent);
}

.hero__name {
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.hero__name em {
  font-style: italic;
  color: var(--color-accent);
}

.hero__intro {
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  color: var(--color-text-muted);
  max-width: 440px;
  line-height: 1.75;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  padding-top: 0.5rem;
}

/* Hero Image */
.hero__image {
  position: relative;
  display: flex;
  justify-content: flex-end;
  align-items: flex-start;
}

.hero__image-wrap {
  position: relative;
  width: 100%;
  max-width: 400px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background-color: var(--color-accent-pale);
  aspect-ratio: 4 / 5;
}

.hero__image-wrap::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.4);
  pointer-events: none;
}

.hero__image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  transition: transform 0.6s var(--transition);
}

.hero__image-wrap:hover img {
  transform: scale(1.03);
}

.hero__badge {
  position: absolute;
  bottom: -1.5rem;
  left: -1.5rem;
  background-color: var(--color-text);
  color: var(--color-bg);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  box-shadow: var(--shadow-md);
}

.hero__badge strong,
.hero__badge span {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  line-height: 1;
  color: var(--color-accent-pale);
}

.hero__badge small {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 1.4;
  color: rgba(245, 243, 239, 0.7);
}

/* Scroll indicator */
.hero__scroll {
  position: absolute;
  bottom: 1.5rem;
  left: var(--side-pad);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text-muted);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.hero__scroll-line {
  width: 48px;
  height: 1px;
  background-color: var(--color-border);
  position: relative;
  overflow: hidden;
}

.hero__scroll-line::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background-color: var(--color-accent);
  animation: scroll-line 2.4s ease-in-out infinite;
}

@keyframes scroll-line {
  0% {
    left: -100%;
  }
  50% {
    left: 0%;
  }
  100% {
    left: 100%;
  }
}

/* ── ABOUT ──────────────────────────────────── */
.about__inner {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 3rem 4rem;
  align-items: start;
}

.about__content {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 4rem;
  align-items: start;
}

.about__heading {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.about__body {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.about__body p {
  font-size: 0.975rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.about__highlights {
  display: flex;
  gap: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  margin-top: 0.5rem;
  flex-wrap: wrap;
}

.highlight {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.highlight strong {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  color: var(--color-accent);
  line-height: 1;
}

.highlight span {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* ── SKILLS ─────────────────────────────────── */
.skills {
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.skills__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.skill-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition:
    transform var(--transition),
    box-shadow var(--transition),
    border-color var(--transition);
}

.skill-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent-pale);
}

.skill-card__icon {
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.skill-card__title {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 0.85rem;
  color: var(--color-text);
}

.skill-card__list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.skill-card__list li {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  padding-left: 0.9rem;
  position: relative;
}

.skill-card__list li::before {
  content: "–";
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

/* ── PROJECTS ───────────────────────────────── */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.project-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition:
    transform var(--transition),
    box-shadow var(--transition);
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.project-card__image {
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--color-accent-pale);
}

.project-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.55s var(--transition);
}

.project-card:hover .project-card__image img {
  transform: scale(1.05);
}

.project-card__body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  flex: 1;
}

.project-card__tag {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.project-card__title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-text);
}

.project-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  flex: 1;
}

.project-card__techs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding-top: 0.5rem;
}

.project-card__techs span {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  padding: 0.3rem 0.75rem;
  border-radius: 100px;
  background-color: var(--color-accent-pale);
  color: var(--color-accent);
  border: 1px solid rgba(184, 115, 51, 0.18);
}

/* ── CONTACT ────────────────────────────────── */
.contact {
  background-color: var(--color-text);
  color: var(--color-bg);
}

.contact__inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2rem;
}

.contact .section__label {
  color: rgba(184, 115, 51, 0.85);
}

.contact__heading {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5.5vw, 4.5rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-bg);
}

.contact__heading em {
  color: var(--color-accent-pale);
}

.contact__sub {
  font-size: 1rem;
  color: rgba(245, 243, 239, 0.55);
  max-width: 420px;
}

.contact__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 1rem;
}

.contact__link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.875rem;
  font-weight: 400;
  padding: 1rem;
  border-radius: 100px;
  border: 1.5px solid rgba(245, 243, 239, 0.15);
  color: rgba(245, 243, 239, 0.8);
  background-color: rgba(255, 255, 255, 0.05);
  transition:
    background-color var(--transition),
    border-color var(--transition),
    color var(--transition),
    transform var(--transition);
}

.contact__link:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg);
  transform: translateY(-2px);
}

/* ── FOOTER ─────────────────────────────────── */
.footer {
  background-color: #141210;
  padding-block: 1.75rem;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer__copy,
.footer__made {
  font-size: 0.75rem;
  color: rgba(245, 243, 239, 0.3);
  letter-spacing: 0.03em;
}

/* ── RESPONSIVE ─────────────────────────────── */
@media (max-width: 1024px) {
  .skills__grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .about__content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

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

  .nav__list {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(245, 243, 239, 0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    flex-direction: column;
    align-items: center;
    gap: 0;
    padding-block: 1rem;
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-110%);
    transition: transform var(--transition);
    z-index: 99;
  }

  .nav__list.is-open {
    transform: translateY(0);
    top: 68px;
  }

  .nav__list li {
    width: 100%;
    text-align: center;
  }

  .nav__link {
    display: block;
    padding: 1rem;
    font-size: 0.95rem;
  }

  /* Hero */
  .hero__inner {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    text-align: center;
    padding-top: 2rem;
  }

  .hero__text {
    align-items: center;
    order: 2;
  }

  .hero__intro {
    max-width: 100%;
  }

  .hero__image {
    order: 1;
    justify-content: center;
  }

  .hero__image-wrap {
    max-width: 280px;
  }

  .hero__badge {
    left: 50%;
    transform: translateX(-50%);
    bottom: -1.5rem;
    white-space: nowrap;
  }

  .hero__scroll {
    display: none;
  }

  /* Projects */
  .projects__grid {
    grid-template-columns: 1fr;
  }

  /* Skills */
  .skills__grid {
    grid-template-columns: 1fr;
  }

  /* About */
  .about__inner {
    grid-template-columns: 1fr;
  }

  .about__highlights {
    gap: 1.5rem;
  }

  /* Contact */
  .contact__links {
    margin: 0 auto;
  }

  .contact__link {
    padding: 0.8rem;
  }
}

@media (max-width: 480px) {
  .hero__actions {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    justify-content: center;
    width: 100%;
  }

  .hero__image-wrap {
    max-width: 240px;
  }

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }
}

/* ── FOCUS VISIBLE ──────────────────────────── */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ── PRINT ──────────────────────────────────── */
@media print {
  .site-header,
  .hero__scroll,
  .nav__toggle {
    display: none;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}