/* ===================================================================
   PORTFOLIO — style.css
   Modern minimalist design system.
   Theme (light/dark) is controlled via [data-theme] on <html>.
   Language switching only affects text content (rendered by script.js);
   this file only ensures layout works correctly for both RU/EN strings.
=================================================================== */

/* ---------------------------------------------------------------
   1. CSS VARIABLES — THEME TOKENS
--------------------------------------------------------------- */
:root {
  /* Typography */
  --font-main: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Courier New", monospace;

  /* Spacing scale */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;

  /* Radii & transitions */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --container-max: 1180px;
  --header-height: 76px;

  /* Accent (shared across themes) */
  --accent: #6d5efc;
  --accent-hover: #8677ff;
  --accent-rgb: 109, 94, 252;
}

/* Dark theme (default) */
:root,
[data-theme="dark"] {
  --bg-primary: #0b0c10;
  --bg-secondary: #131419;
  --bg-elevated: #1b1c24;
  --bg-elevated-hover: #22232d;
  --border-color: rgba(255, 255, 255, 0.08);

  --text-primary: #f5f5f7;
  --text-secondary: #a2a3ab;
  --text-tertiary: #6b6c76;

  --shadow-color: rgba(0, 0, 0, 0.45);
}

/* Light theme */
[data-theme="light"] {
  --bg-primary: #fafafa;
  --bg-secondary: #ffffff;
  --bg-elevated: #f2f2f5;
  --bg-elevated-hover: #e9e9ee;
  --border-color: rgba(0, 0, 0, 0.08);

  --text-primary: #16161a;
  --text-secondary: #55565f;
  --text-tertiary: #8a8b93;

  --shadow-color: rgba(0, 0, 0, 0.08);
}

/* ---------------------------------------------------------------
   2. RESET & BASE
--------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--transition), color var(--transition);
  overflow-x: hidden;
}

img,
video {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input,
textarea {
  font-family: inherit;
  color: inherit;
}

h1,
h2,
h3,
h4 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  margin-bottom: var(--space-lg);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -10px;
  width: 42px;
  height: 4px;
  border-radius: 4px;
  background: var(--accent);
}

/* ---------------------------------------------------------------
   3. BUTTONS
--------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.8rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform var(--transition), background-color var(--transition),
    color var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 8px 24px -8px rgba(var(--accent-rgb), 0.6);
}

.btn--primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
}

.btn--secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn--secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* ---------------------------------------------------------------
   4. HEADER / NAV
--------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 1000;
  background: rgba(var(--bg-primary-rgb), 0.7);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition), border-color var(--transition);
}

.header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  flex-shrink: 0;
}

.main-nav__list {
  display: flex;
  gap: var(--space-lg);
}

.main-nav__list a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  transition: color var(--transition);
}

.main-nav__list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}

.main-nav__list a:hover {
  color: var(--text-primary);
}

.main-nav__list a:hover::after {
  width: 100%;
}

.main-nav__list a.is-active-link {
  color: var(--accent);
}

.main-nav__list a.is-active-link::after {
  width: 100%;
}

.header__controls {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Language switcher */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  transition: border-color var(--transition), color var(--transition);
}

.lang-switch:hover {
  border-color: var(--accent);
}

.lang-switch__option {
  padding: 0.1rem 0.2rem;
  border-radius: 4px;
  transition: color var(--transition), background-color var(--transition);
}

.lang-switch__option.is-active {
  color: var(--accent);
}

.lang-switch__divider {
  color: var(--text-tertiary);
}

/* Theme switcher */
.theme-switch {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
  transition: border-color var(--transition), background-color var(--transition);
}

.theme-switch:hover {
  border-color: var(--accent);
}

.theme-switch .icon {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: var(--text-primary);
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  position: absolute;
  transition: opacity var(--transition), transform var(--transition);
}

.theme-switch .icon--moon {
  opacity: 0;
  transform: scale(0.5) rotate(-90deg);
}

[data-theme="dark"] .theme-switch .icon--sun {
  opacity: 0;
  transform: scale(0.5) rotate(90deg);
}

[data-theme="dark"] .theme-switch .icon--moon {
  opacity: 1;
  transform: scale(1) rotate(0deg);
}

/* Burger (mobile) */
.burger {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.burger span {
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.burger.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.burger.is-active span:nth-child(2) {
  opacity: 0;
}
.burger.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------------------------------------------------------------
   5. HERO
--------------------------------------------------------------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  position: relative;
  background: radial-gradient(
    circle at 80% 20%,
    rgba(var(--accent-rgb), 0.12),
    transparent 60%
  );
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-xl);
  align-items: center;
}

.hero__greeting {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  margin-bottom: var(--space-sm);
  letter-spacing: 0.05em;
}

.hero__name {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  margin-bottom: var(--space-xs);
}

.hero__role {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  font-weight: 500;
}

.hero__tagline {
  color: var(--text-secondary);
  max-width: 480px;
  margin-bottom: var(--space-lg);
}

.hero__cta {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.hero__media {
  display: flex;
  justify-content: center;
}

.hero__avatar-wrap {
  width: min(360px, 100%);
  aspect-ratio: 1 / 1.6;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
  background: var(--bg-elevated);
  box-shadow: 0 30px 60px -20px var(--shadow-color);
}

.hero__avatar {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scroll-indicator {
  position: absolute;
  left: 50%;
  bottom: var(--space-lg);
  transform: translateX(-50%);
  width: 26px;
  height: 42px;
  border: 2px solid var(--border-color);
  border-radius: 20px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}

.scroll-indicator span {
  width: 4px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent);
  animation: scrollDown 1.6s infinite;
}

@keyframes scrollDown {
  0% {
    opacity: 1;
    transform: translateY(0);
  }
  100% {
    opacity: 0;
    transform: translateY(14px);
  }
}

/* ---------------------------------------------------------------
   6. ABOUT
--------------------------------------------------------------- */
.about {
  padding: var(--space-2xl) 0;
}

.about__grid {
  display: grid;
  grid-template-columns: 0.9fr 1.6fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.about__photo-wrap {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  background: var(--bg-elevated);
  aspect-ratio: 4 / 5;
}

.about__photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about__description {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: var(--space-lg);
  /* Опционально: текст с красной строкой часто выравнивают по ширине */
  text-align: justify;
}

/* Стили для самих абзацев внутри контейнера */
.about__description p {
  margin: 0 0 0.25rem 0; /* Небольшой вертикальный отступ между абзацами */
  line-height: 1.6;      /* Улучшает читаемость */
}

/* Красная строка: применяется только к абзацу, который идет сразу за другим абзацем (пропускаем первый) */
.about__description p + p {
  text-indent: 1.5em; 
}
.about__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.stat-item {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-align: center;
  transition: transform var(--transition), border-color var(--transition);
}

.stat-item:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

.stat-item__value {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent);
  display: block;
  font-family: var(--font-mono);
}

.stat-item__label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
  display: block;
}

/* Skills */
.skills__title {
  font-size: 1.4rem;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-md);
}

.skill-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: transform var(--transition), border-color var(--transition),
    background-color var(--transition);
}

.skill-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  background: var(--bg-elevated-hover);
}

.skill-card__header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: var(--space-sm);
}

.skill-card__icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  opacity: 0.9;
}

.skill-card__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
}

.skill-card__list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.skill-card__item {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding-left: 1rem;
  position: relative;
  line-height: 1.5;
}

.skill-card__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* ---------------------------------------------------------------
   7. PROJECTS
--------------------------------------------------------------- */
.projects {
  padding: var(--space-2xl) 0;
  background: var(--bg-secondary);
}

.projects__filters {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-bottom: var(--space-lg);
}

.filter-btn {
  padding: 0.5rem 1.1rem;
  border-radius: 999px;
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.filter-btn:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}

.filter-btn.is-active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-md);
}

.project-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--transition), border-color var(--transition),
    box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent);
  box-shadow: 0 24px 48px -16px var(--shadow-color);
}

.project-card__thumb-wrap {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg-elevated-hover);
}

.project-card__thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-card__thumb {
  transform: scale(1.08);
}

.project-card__body {
  padding: var(--space-md);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.project-card__category {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-weight: 700;
}

.project-card__title {
  font-size: 1.15rem;
  font-weight: 700;
}

.project-card__description {
  font-size: 0.9rem;
  color: var(--text-secondary);
  flex: 1;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.5rem;
}

.tag {
  font-size: 0.72rem;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  background: var(--bg-elevated-hover);
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

/* ---------------------------------------------------------------
   8. CONTACT
--------------------------------------------------------------- */
.contact {
  padding: var(--space-2xl) 0;
}

.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

.contact__description {
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  max-width: 420px;
}

.contact__email {
  display: inline-block;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: var(--space-lg);
  font-family: var(--font-mono);
  word-break: break-all;
}

.contact__socials {
  display: flex;
  gap: var(--space-sm);
}

.social-link {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition), border-color var(--transition),
    background-color var(--transition);
}

.social-link img {
  width: 20px;
  height: 20px;
}

.social-link:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  background: var(--bg-elevated);
}

.contact__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.form-group input,
.form-group textarea {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.8rem 1rem;
  font-size: 0.95rem;
  transition: border-color var(--transition), background-color var(--transition);
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.contact__form .btn {
  align-self: flex-start;
}

/* ---------------------------------------------------------------
   9. FOOTER
--------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding: var(--space-lg) 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.footer__inner p {
  color: var(--text-tertiary);
  font-size: 0.85rem;
}

.footer__to-top {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition), border-color var(--transition);
}

.footer__to-top:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

/* ---------------------------------------------------------------
   10. MODAL (project details)
--------------------------------------------------------------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

.modal.is-open {
  opacity: 1;
  visibility: visible;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(6px);
}

.modal__dialog {
  position: relative;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  max-width: 720px;
  width: 100%;
  max-height: 88vh;
  overflow-y: auto;
  transform: translateY(20px) scale(0.98);
  transition: transform var(--transition);
  box-shadow: 0 40px 80px -20px var(--shadow-color);
}

.modal.is-open .modal__dialog {
  transform: translateY(0) scale(1);
}

.modal__close {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-elevated);
  font-size: 1.4rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: background-color var(--transition), transform var(--transition);
}

.modal__close:hover {
  background: var(--accent);
  color: #fff;
  transform: rotate(90deg);
}

.modal__media {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--bg-elevated);
  overflow: hidden;
}

.modal__media img,
.modal__media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.modal__body {
  padding: var(--space-lg);
}

.modal__category {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-weight: 700;
}

.modal__title {
  font-size: 1.5rem;
  margin: 0.5rem 0 1rem;
}

.modal__description {
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.modal__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: var(--space-lg);
}

/* ---------------------------------------------------------------
   11. RESPONSIVE — TABLET
--------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero__inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-lg);
  }

  .hero__tagline {
    margin-left: auto;
    margin-right: auto;
  }

  .hero__cta {
    justify-content: center;
  }

  .hero__media {
    order: -1;
  }

  .hero__avatar-wrap {
    width: min(260px, 60%);
  }

  .about__grid {
    grid-template-columns: 1fr;
  }

  .about__photo-wrap {
    max-width: 320px;
    margin: 0 auto;
    aspect-ratio: 1 / 1;
  }

  .contact__inner {
    grid-template-columns: 1fr;
  }
}

/* ---------------------------------------------------------------
   12. RESPONSIVE — MOBILE
--------------------------------------------------------------- */
@media (max-width: 768px) {
  :root {
    --space-2xl: 4rem;
    --space-xl: 2.5rem;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
  }

  .main-nav.is-open {
    max-height: 320px;
  }

  .main-nav__list {
    flex-direction: column;
    padding: var(--space-md);
    gap: var(--space-md);
  }

  .burger {
    display: flex;
  }

  .lang-switch span:not(.lang-switch__divider) {
    padding: 0.1rem 0.15rem;
  }

  .about__stats {
    grid-template-columns: 1fr;
  }

  .projects__grid {
    grid-template-columns: 1fr;
  }

  .modal__dialog {
    max-height: 94vh;
  }
}

@media (max-width: 480px) {
  .hero__name {
    font-size: 2.1rem;
  }

  .hero__cta {
    flex-direction: column;
    width: 100%;
  }

  .hero__cta .btn {
    width: 100%;
  }

  .header__controls {
    gap: 0.4rem;
  }

  .lang-switch {
    padding: 0.35rem 0.55rem;
    font-size: 0.75rem;
  }
}

/* ---------------------------------------------------------------
   13. UTILITY / rgb helper for header backdrop
--------------------------------------------------------------- */
:root {
  --bg-primary-rgb: 11, 12, 16;
}

[data-theme="light"] {
  --bg-primary-rgb: 250, 250, 250;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}
