/* ============================================
   MLH MODULAIRES — Анимации и микро-взаимодействия
   ============================================ */

/* ============================================
   КЛЮЧЕВЫЕ КАДРЫ (KEYFRAMES)
   ============================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.93);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Геометрическое появление панели — вдохновлено слоями логотипа */
@keyframes layerReveal {
  0%   { clip-path: inset(0 100% 0 0); opacity: 0; }
  100% { clip-path: inset(0 0% 0 0);   opacity: 1; }
}

@keyframes lineExpand {
  from { width: 0; }
  to   { width: 56px; }
}

@keyframes lineExpandFull {
  from { width: 0; }
  to   { width: 100%; }
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0, 150, 220, 0.4); }
  50%       { box-shadow: 0 0 0 12px rgba(0, 150, 220, 0); }
}

@keyframes gridPan {
  0%   { background-position: 0 0; }
  100% { background-position: 60px 60px; }
}

@keyframes heroFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  33%       { transform: translateY(-8px) rotate(0.5deg); }
  66%       { transform: translateY(-4px) rotate(-0.3deg); }
}

@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

@keyframes borderFlow {
  0%   { border-color: var(--border-lt); }
  50%  { border-color: var(--blue); }
  100% { border-color: var(--border-lt); }
}

@keyframes countUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes progressBar {
  from { width: 0; }
}

/* ============================================
   КЛАССЫ ДЛЯ ПОЯВЛЕНИЯ ПРИ ПРОКРУТКЕ
   (Применяются через Intersection Observer в JS)
   ============================================ */

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

.reveal-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

.reveal-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

.reveal-scale {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

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

/* Шахматные задержки (Stagger delays) */
.delay-1 { transition-delay: 0.1s !important; }
.delay-2 { transition-delay: 0.2s !important; }
.delay-3 { transition-delay: 0.3s !important; }
.delay-4 { transition-delay: 0.4s !important; }
.delay-5 { transition-delay: 0.5s !important; }
.delay-6 { transition-delay: 0.6s !important; }

/* ============================================
   АНИМАЦИИ ГЛАВНОГО ЭКРАНА (HERO)
   ============================================ */

.hero-content {
  animation: fadeInUp 1s var(--ease) 0.3s both;
}

.hero-label {
  animation: fadeInUp 0.8s var(--ease) 0.1s both;
}

.hero-cta {
  animation: fadeInUp 0.8s var(--ease) 0.6s both;
}

.hero-scroll-hint {
  animation: fadeIn 1s var(--ease) 1.2s both;
}

/* ============================================
   АНИМАЦИЯ АКЦЕНТНОЙ ЛИНИИ
   ============================================ */

.accent-line {
  animation: lineExpand 0.8s var(--ease) 0.4s both;
}

/* Для линий внутри разделов, срабатывает при появлении */
.reveal.is-visible .accent-line,
.reveal-left.is-visible .accent-line,
.reveal-right.is-visible .accent-line {
  animation: lineExpand 0.8s var(--ease) 0.2s both;
}

/* ============================================
   АНИМАЦИЯ ФОНОВОЙ СЕТКИ (HERO)
   ============================================ */

.animated-grid {
  background-image:
    linear-gradient(rgba(0, 150, 220, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 150, 220, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: gridPan 8s linear infinite;
}

/* ============================================
   ГЕОМЕТРИЧЕСКИЕ ФИГУРЫ (Декор HERO)
   ============================================ */

.geo-shape {
  position: absolute;
  opacity: 0.07;
  animation: heroFloat 6s ease-in-out infinite;
}

.geo-shape--1 { animation-delay: 0s;   animation-duration: 7s; }
.geo-shape--2 { animation-delay: -2s;  animation-duration: 9s; }
.geo-shape--3 { animation-delay: -4s;  animation-duration: 6s; }

/* ============================================
   АНИМАЦИИ ПАНЕЛИ НАВИГАЦИИ (NAVBAR)
   ============================================ */

.navbar {
  animation: slideDown 0.6s var(--ease) both;
}

.navbar.scrolled {
  transition: all 0.4s var(--ease);
}

/* ============================================
   ЭФФЕКТЫ НАВЕДЕНИЯ (HOVER EFFECTS)
   ============================================ */

/* Эффект мерцания кнопки (Shimmer) */
.btn--primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    transparent 40%,
    rgba(255, 255, 255, 0.15) 50%,
    transparent 60%
  );
  background-size: 200% auto;
  opacity: 0;
  transition: opacity 0.3s;
}

.btn--primary:hover::after {
  opacity: 1;
  animation: shimmer 0.8s linear;
}

/* Анимация пульсации для CTA */
.btn--pulse {
  animation: pulse 2s ease-in-out infinite;
}

/* ============================================
   АНИМАЦИИ АНАТОМИИ СТЕНЫ
   ============================================ */

.wall-layer {
  transition: all 0.35s var(--ease);
}

.wall-layer:hover {
  filter: brightness(1.2) drop-shadow(0 0 12px rgba(0, 150, 220, 0.4));
}

.wall-tooltip {
  animation: fadeInUp 0.25s var(--ease) both;
}

/* ============================================
   АНИМАЦИИ КАЛЬКУЛЯТОРА
   ============================================ */

.calc-step {
  animation: fadeIn 0.4s var(--ease) both;
}

.calc-step-exit {
  animation: fadeIn 0.3s var(--ease) reverse both;
}

.calc-option {
  transition: all 0.25s var(--ease);
}

.calc-option:hover {
  transform: translateY(-3px);
  border-color: var(--blue) !important;
}

.calc-option.selected {
  border-color: var(--blue) !important;
  background: var(--blue-glow) !important;
  animation: borderFlow 0s; /* stop animation */
}

/* Заполнение индикатора выполнения */
.calc-progress-fill {
  transition: width 0.5s var(--ease);
}

/* ============================================
   АНИМАЦИИ КАРТОЧЕК ПОРТФОЛИО
   ============================================ */

.project-card {
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.project-card:hover {
  transform: translateY(-8px);
}

.project-card__img-wrap {
  overflow: hidden;
}

.project-card__img {
  transition: transform 0.6s var(--ease);
}

.project-card:hover .project-card__img {
  transform: scale(1.06);
}

.project-card__overlay {
  transition: opacity 0.4s var(--ease);
}

/* ============================================
   АНИМАЦИИ ВРЕМЕННОЙ ШКАЛЫ ПРОЦЕССА
   ============================================ */

.process-step {
  transition: all 0.3s var(--ease);
}

.process-step:hover .process-step__icon {
  background: var(--blue);
  box-shadow: 0 0 30px rgba(0, 150, 220, 0.5);
}

.process-line {
  animation: lineExpandFull 1.2s var(--ease) 0.5s both;
  transform-origin: left;
}

/* ============================================
   АНИМАЦИЯ СЧЕТЧИКА СТАТИСТИКИ
   ============================================ */

.stat-counter {
  transition: color 0.3s var(--ease);
}

.stat-counter.counting {
  color: var(--blue-lt);
}

/* ============================================
   МОБИЛЬНОЕ МЕНЮ
   ============================================ */

.mobile-menu {
  animation: slideDown 0.4s var(--ease) both;
}

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