/* ========================================
   CSS Variables
   ======================================== */
:root {
  --color-bg: #F5F5F5;
  --color-text: #1A1A1A;
  --color-text-secondary: #666666;
  --color-border: #E0E0E0;
  --color-white: #FFFFFF;
  --color-accent: #0066FF;
  
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  --font-size-hero: clamp(6rem, 18vw, 14rem);
  --font-size-section-title: clamp(2rem, 5vw, 3.5rem);
  --font-size-project-name: clamp(1.5rem, 3vw, 2.5rem);
  --font-size-body: 1.1rem;
  
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 4rem;
  --spacing-xxl: 6rem;
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ========================================
   Reset & Base
   ======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

/* Разрешаем выделение только для email */
a, .footer-email {
  -webkit-user-select: text;
  -moz-user-select: text;
  -ms-user-select: text;
  user-select: text;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-body);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  cursor: default;
  position: relative;
  min-height: 100vh;
  padding: 20px;
  border: 2px solid var(--color-border);
  margin: 0;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
  min-height: 50vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  padding: var(--spacing-xl) var(--spacing-md);
  position: relative;
  overflow: hidden;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero-tagline {
  font-size: clamp(1rem, 2vw, 1.5rem);
  font-weight: 400;
  color: var(--color-text-secondary);
  margin-top: var(--spacing-md);
  letter-spacing: 0.05em;
  opacity: 0;
  animation: fadeIn 0.8s ease 0.6s forwards;
}

.qrium-logo {
  font-size: var(--font-size-hero);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 0.9;
  cursor: pointer;
  position: relative;
  user-select: none;
  opacity: 0;
  animation: fadeIn 0.8s ease forwards;
  color: #1A1A1A;
  display: inline-block;
}

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

.qrium-logo .letter {
  position: relative;
  display: inline-block;
  will-change: transform;
  /* Буква полностью прозрачна - видимы только частицы */
  color: transparent;
  min-width: 0.1em; /* Минимальная ширина для контейнера */
}

.qrium-logo .letter .particle {
  position: absolute;
  font-size: 0.12em;
  color: #1A1A1A;
  opacity: 0.85;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1),
              opacity 0.3s ease,
              filter 0.3s ease;
  pointer-events: none;
  will-change: transform;
  font-weight: 400;
  line-height: 1;
  white-space: nowrap;
  display: inline-block;
}

.qrium-logo .letter .particle.active {
  opacity: 0.9;
}

/* ========================================
   Projects Section
   ======================================== */
.projects-section {
  padding: var(--spacing-md) var(--spacing-md);
  background: var(--color-bg);
  max-width: 1400px;
  margin: 0 auto;
}

.projects-section--compact {
  padding: var(--spacing-sm) var(--spacing-md);
  position: relative;
}

/* Подписи категорий над группами */
.category-labels-row {
  position: relative;
  min-height: 25px;
  margin-bottom: var(--spacing-md);
  width: 100%;
  display: none; /* По умолчанию скрыты */
}

/* На десктопе подписи позиционируются абсолютно через JS */
@media (min-width: 1025px) {
  .category-labels-row {
    display: block;
  }
  
  .category-label-wrapper {
    position: absolute;
    top: 0;
  }
}

.category-label-wrapper {
  position: relative;
  top: 0;
  flex: 0 0 auto;
}

.category-label {
  font-size: clamp(0.65rem, 1.5vw, 0.75rem);
  font-weight: 500;
  color: var(--color-text-secondary);
  white-space: nowrap;
  opacity: 0.8;
  display: inline-block;
}

.projects-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm);
  position: relative;
}

/* Подписи перед группами проектов на мобильных (добавляются через JS) */
.category-label-mobile {
  display: none;
  width: 100%;
  text-align: center;
  font-size: clamp(0.6rem, 2.5vw, 0.65rem);
  font-weight: 500;
  color: var(--color-text-secondary);
  opacity: 0.8;
  margin-bottom: var(--spacing-xs);
  margin-top: var(--spacing-sm);
}

@media (max-width: 1024px) {
  .category-label-mobile {
    display: block;
  }
  
  .category-label-mobile:first-of-type {
    margin-top: 0;
  }
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.section-title {
  font-size: var(--font-size-section-title);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text);
}

/* ========================================
   Projects Grid
   ======================================== */
.projects-grid {
  display: grid;
  gap: var(--spacing-md);
  border: 2px solid var(--color-border);
  border-radius: 12px;
  padding: var(--spacing-lg);
  background: var(--color-white);
}

.projects-grid--qr {
  grid-template-columns: repeat(2, 1fr);
}

.projects-grid--it {
  grid-template-columns: repeat(3, 1fr);
}

/* ========================================
   Project Card
   ======================================== */
.project-card {
  padding: var(--spacing-md);
  border-radius: 8px;
  transition: transform var(--transition-normal),
              box-shadow var(--transition-normal);
  opacity: 0;
  transform: translateY(20px);
  animation: slideUp 0.6s ease forwards;
}

.project-card:nth-child(1) {
  animation-delay: 0.1s;
}

.project-card:nth-child(2) {
  animation-delay: 0.2s;
}

.project-card:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes slideUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

/* Микроблоки */
.project-card--micro {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-white);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 120px;
  min-height: 100px;
  transition: all var(--transition-normal);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}

.project-card--micro:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  border-color: var(--color-text);
}

.project-icon {
  width: 64px;
  height: 64px;
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-normal);
}

.project-icon--micro {
  width: 32px;
  height: 32px;
  margin-bottom: var(--spacing-xs);
}

.project-card:hover .project-icon {
  transform: scale(1.1);
}

.project-card--micro:hover .project-icon--micro {
  transform: scale(1.15);
}

.project-icon svg {
  width: 100%;
  height: 100%;
}

.project-name {
  font-size: var(--font-size-project-name);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.project-name--micro {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0;
  text-align: center;
  white-space: nowrap;
}

.project-description {
  font-size: var(--font-size-body);
  line-height: 1.6;
  color: var(--color-text-secondary);
}

.project-description--micro {
  font-size: 0.75rem;
  line-height: 1.4;
  color: var(--color-text-secondary);
  text-align: center;
  margin-top: var(--spacing-xs);
  max-width: 200px;
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: all 0.3s ease;
}

.project-card--micro:hover .project-description--micro {
  opacity: 1;
  max-height: 100px;
  margin-top: var(--spacing-xs);
}

.project-card--micro {
  position: relative;
}

/* Footer */
.site-footer {
  text-align: center;
  padding: var(--spacing-md) 0;
  margin-top: var(--spacing-lg);
}

.footer-email {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 0.3s ease;
  cursor: pointer;
  display: inline-block;
}

.footer-email:hover {
  color: var(--color-text);
}

/* ========================================
   Responsive Design
   ======================================== */

/* Tablet */
@media (max-width: 1024px) {
  .projects-grid--it {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .projects-section {
    padding: var(--spacing-xl) var(--spacing-md);
  }
}

/* Tablet */
@media (max-width: 1024px) {
  .projects-row {
    gap: var(--spacing-xs);
  }
  
  .project-card--micro {
    min-width: 110px;
    min-height: 90px;
  }
  
  .category-labels-row {
    min-height: 20px;
    margin-bottom: var(--spacing-sm);
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
  }
  
  .category-label {
    font-size: clamp(0.65rem, 2vw, 0.7rem);
  }
  
  .category-label-wrapper {
    position: relative !important;
    left: auto !important;
    transform: none !important;
  }
}

/* Mobile */
@media (max-width: 768px) {
  body {
    padding: 15px;
  }
  
  .hero {
    min-height: 40vh;
    padding: var(--spacing-lg) var(--spacing-sm);
  }
  
  .hero-content {
    width: 100%;
  }
  
  .qrium-logo {
    font-size: clamp(3.5rem, 18vw, 8rem);
  }
  
  .hero-tagline {
    font-size: clamp(0.9rem, 3vw, 1.2rem);
    margin-top: var(--spacing-sm);
  }
  
  .projects-section {
    padding: var(--spacing-md) var(--spacing-sm);
  }
  
  .projects-section--compact {
    padding: var(--spacing-sm) var(--spacing-xs);
  }
  
  .projects-row {
    gap: 8px;
    padding: var(--spacing-xs);
    justify-content: center;
    flex-wrap: wrap;
  }
  
  .project-card--micro {
    min-width: 85px;
    min-height: 70px;
    padding: 8px 6px;
    flex: 0 0 auto;
  }
  
  .project-name--micro {
    font-size: 0.7rem;
  }
  
  .project-icon--micro {
    width: 20px;
    height: 20px;
  }
  
  .category-labels-row {
    min-height: 20px;
    margin-bottom: var(--spacing-xs);
    gap: var(--spacing-xs);
    flex-direction: column;
    align-items: center;
  }
  
  .category-label {
    font-size: clamp(0.6rem, 2.5vw, 0.65rem);
  }
  
  .project-description--micro {
    font-size: 0.65rem;
    max-width: 150px;
  }
  
  /* Отключаем позиционирование через JS на мобильных */
  .category-label-wrapper--qr,
  .category-label-wrapper--it {
    position: relative !important;
    transform: none !important;
    left: auto !important;
    width: 100%;
    text-align: center;
  }
  
  /* Правильный порядок на мобильных: сначала QR-маркетинг, потом для IT-компаний */
  .category-label-wrapper--qr {
    order: 1;
  }
  
  .category-label-wrapper--it {
    order: 2;
  }
  
  .site-footer {
    padding: var(--spacing-sm) 0;
    margin-top: var(--spacing-md);
  }
  
  .footer-email {
    font-size: 0.8rem;
  }
}

/* Small Mobile */
@media (max-width: 480px) {
  body {
    padding: 10px;
  }
  
  .hero {
    min-height: 35vh;
    padding: var(--spacing-md) var(--spacing-xs);
  }
  
  .qrium-logo {
    font-size: clamp(2.5rem, 20vw, 6rem);
  }
  
  .hero-tagline {
    font-size: 0.85rem;
    margin-top: var(--spacing-xs);
  }
  
  .projects-row {
    gap: 8px;
    padding: var(--spacing-xs) 4px;
  }
  
  .project-card--micro {
    min-width: 80px;
    min-height: 70px;
    padding: 6px;
  }
  
  .project-name--micro {
    font-size: 0.65rem;
  }
  
  .project-icon--micro {
    width: 18px;
    height: 18px;
  }
  
  .category-label {
    font-size: clamp(0.55rem, 3vw, 0.6rem);
  }
  
  .category-labels-row {
    min-height: 18px;
    margin-bottom: var(--spacing-xs);
    gap: var(--spacing-xs);
  }
  
  .category-label-wrapper {
    width: 100%;
    text-align: center;
  }
}

/* Small Mobile */
@media (max-width: 480px) {
  .hero {
    min-height: 40vh;
  }
  
  .qrium-logo {
    font-size: clamp(2.5rem, 18vw, 4rem);
  }
  
  .projects-grid {
    padding: var(--spacing-sm);
    gap: var(--spacing-sm);
  }
}

/* ========================================
   Accessibility
   ======================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
  .hero {
    min-height: auto;
    padding: var(--spacing-md);
  }
  
  .qrium-logo .letter .particle {
    display: none;
  }
}