/* ===== RESET & BASE ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-primary: #2563eb;
  --color-success: #10b981;
  --color-error: #ef4444;
  --color-warning: #f59e0b;
  --color-text-primary: #1f2937;
  --color-text-secondary: #6b7280;
  --color-bg-main: #f3f4f6;
  --color-bg-card: #ffffff;
  --color-border: #e5e7eb;
  --color-hover: #f9fafb;
  --color-chip: #eef2ff;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --radius-card: 20px;
  --radius-button: 10px;
  --transition: all 0.25s ease;
  --layout-max-width: 1200px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--color-text-primary);
  background: radial-gradient(circle at top, #ffffff 0%, var(--color-bg-main) 65%);
  line-height: 1.5;
}

/* ===== HEADER ===== */
.main-header {
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 200;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

.header-container {
  max-width: var(--layout-max-width);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px;
  background: var(--color-bg-main);
  border-radius: 999px;
}

.lang-btn {
  border: none;
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-text-secondary);
  background: transparent;
  cursor: pointer;
  transition: var(--transition);
}

.lang-btn:hover {
  color: var(--color-text-primary);
}

.lang-btn.active {
  background: var(--color-bg-card);
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

/* ===== NAVIGATION ===== */
.main-nav {
  background: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border);
}

.nav-shell {
  max-width: var(--layout-max-width);
  margin: 0 auto;
  padding: 8px 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-track {
  min-width: 0;
  flex: 1;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x proximity;
}

.nav-track::-webkit-scrollbar {
  display: none;
}

.nav-container {
  display: flex;
  gap: 8px;
  align-items: center;
  min-height: 52px;
  width: max-content;
  min-width: 100%;
}

.scroll-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}

.scroll-btn:hover:not(:disabled) {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-chip);
}

.scroll-btn:disabled {
  cursor: default;
  opacity: 0.35;
}

.scroll-btn.is-hidden {
  display: none;
}

.scroll-track {
  position: relative;
}

.scroll-track::before,
.scroll-track::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 30px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease;
  z-index: 3;
}

.scroll-track::before {
  left: 0;
  background: linear-gradient(to right, var(--color-bg-card), rgba(255, 255, 255, 0));
}

.scroll-track::after {
  right: 0;
  background: linear-gradient(to left, var(--color-bg-card), rgba(255, 255, 255, 0));
}

.scroll-track.show-fade-left::before {
  opacity: 1;
}

.scroll-track.show-fade-right::after {
  opacity: 1;
}

.nav-item {
  padding: 10px 14px;
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  border-radius: var(--radius-button);
  transition: var(--transition);
  scroll-snap-align: start;
}

.nav-item:hover {
  background: var(--color-hover);
  color: var(--color-text-primary);
}

.nav-item.active {
  color: var(--color-primary);
  background: var(--color-chip);
}

/* ===== FILTERS ===== */
.filters-section {
  background: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border);
}

.filters-container {
  max-width: var(--layout-max-width);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 14px;
  justify-content: space-between;
}

.filters-scroll {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex: 1;
}

.filters-buttons-track {
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
  flex: 1;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-x;
}

.filters-buttons-track::-webkit-scrollbar {
  display: none;
}

.filters-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.filters-buttons {
  width: max-content;
  min-height: 44px;
}

.filters-controls {
  flex-wrap: nowrap;
}

.filter-btn {
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  border-radius: var(--radius-button);
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-secondary);
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
  scroll-snap-align: start;
}

.filter-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: rgba(37, 99, 235, 0.05);
}

.filter-btn.active {
  background: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

.filter-select {
  min-width: 190px;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-button);
  background: var(--color-bg-card);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-primary);
  cursor: pointer;
}

.filter-select:focus {
  outline: 2px solid rgba(37, 99, 235, 0.2);
  border-color: var(--color-primary);
}

/* ===== PERIOD SELECTOR ===== */
.period-selector,
.global-period-selector {
  display: flex;
  gap: 4px;
  background: var(--color-bg-main);
  padding: 4px;
  border-radius: var(--radius-button);
  flex-shrink: 0;
}

.period-selector {
  margin-left: auto;
  width: fit-content;
}

.period-btn,
.global-period-btn {
  border: none;
  background: transparent;
  border-radius: 8px;
  padding: 7px 10px;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.period-btn:disabled,
.period-btn.is-unavailable {
  opacity: 0.45;
  color: var(--color-text-secondary);
  cursor: default;
  pointer-events: none;
  background: transparent;
  box-shadow: none;
}

.period-btn:hover,
.global-period-btn:hover {
  color: var(--color-text-primary);
}

.period-btn.active,
.global-period-btn.active {
  background: var(--color-bg-card);
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

/* ===== MAIN CONTENT ===== */
.main-content {
  padding: 28px 0;
  min-height: calc(100vh - 210px);
  width: min(100%, var(--layout-max-width));
  margin: 0 auto;
}

.content-container {
  max-width: var(--layout-max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  align-items: start;
}

/* ===== CARD ===== */
.stat-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-card);
  border: 1px solid rgba(15, 23, 42, 0.05);
  box-shadow: var(--shadow-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 360px;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.stat-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-header {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.card-title {
  font-size: 21px;
  line-height: 1.25;
  font-weight: 700;
}

.card-subtitle {
  color: var(--color-text-secondary);
  font-size: 14px;
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.card-meta-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-secondary);
  background: var(--color-bg-main);
  border-radius: 999px;
  padding: 5px 10px;
}

.stats-content {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.stat-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.stat-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stat-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-text-secondary);
  font-weight: 600;
}

.stat-icon {
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-icon img,
.stat-icon svg {
  width: 100%;
  height: 100%;
}

.stat-value {
  font-size: 18px;
  font-weight: 700;
}

.stat-value.status-success {
  color: var(--color-success);
}

.stat-value.status-warning {
  color: var(--color-warning);
}

.stat-value.status-error {
  color: var(--color-error);
}

.stat-delta {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  font-weight: 600;
}

.stat-delta.trend-up {
  color: var(--color-success);
}

.stat-delta.trend-down {
  color: var(--color-error);
}

.stat-delta.trend-neutral {
  color: var(--color-text-secondary);
}

.delta-arrow {
  width: 12px;
  height: 12px;
  display: inline-flex;
}

.delta-arrow svg {
  width: 100%;
  height: 100%;
}

.card-expand {
  margin-top: 4px;
  border: none;
  border-radius: var(--radius-button);
  background: var(--color-bg-main);
  color: var(--color-text-primary);
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  padding: 10px 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: var(--transition);
}

.card-expand:hover {
  background: #e9edf2;
}

.card-expand svg {
  width: 16px;
  height: 16px;
  transition: transform 0.2s ease;
}

.card-expand.expanded svg {
  transform: rotate(180deg);
}

/* ===== REVEAL ANIMATION ===== */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(14px) scale(0.99);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

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

@media (prefers-reduced-motion: reduce) {
  .reveal-on-scroll,
  .reveal-on-scroll.is-visible,
  .stat-card,
  .stat-card:hover {
    transition: none;
    transform: none;
    opacity: 1;
  }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1220px) {
  .cards-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 940px) {
  .filters-container {
    flex-direction: column;
    align-items: stretch;
  }

  .filters-controls {
    justify-content: flex-end;
    width: 100%;
  }
}

@media (max-width: 768px) {
  .main-content {
    padding-top: 20px;
  }

  .nav-shell,
  .header-container,
  .filters-container,
  .content-container {
    padding-left: 16px;
    padding-right: 16px;
  }

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

  .stat-row {
    grid-template-columns: 1fr;
  }

  .filters-controls {
    flex-wrap: nowrap;
    justify-content: flex-end;
    gap: 8px;
  }

  .nav-scroll-btn,
  .filters-scroll-btn {
    display: none;
  }

  .filters-scroll {
    width: 100%;
  }

  .filters-buttons-track {
    width: 100%;
  }

  .filters-group {
    gap: 6px;
  }

  .filter-btn {
    min-height: 36px;
    padding: 8px 12px;
    font-size: 12px;
  }

  .global-period-selector {
    width: 100%;
    justify-content: space-between;
  }

  .global-period-btn {
    flex: 1;
    min-height: 34px;
  }

  .period-selector {
    width: fit-content;
    margin-left: auto;
  }

  .period-btn {
    flex: 0 0 auto;
    min-height: 32px;
  }

  .stat-card {
    min-height: auto;
  }

}

@media (max-width: 520px) {
  .main-content {
    width: 100%;
  }

  .logo {
    font-size: 16px;
  }

  .header-container {
    gap: 10px;
    padding-top: 10px;
    padding-bottom: 10px;
  }

  .lang-btn {
    min-width: 40px;
    min-height: 32px;
    padding: 6px 10px;
  }

  .nav-item {
    padding: 8px 12px;
    font-size: 13px;
  }

  .stat-card {
    padding: 18px;
  }

  .card-title {
    font-size: 18px;
  }

  .card-subtitle {
    font-size: 13px;
  }
}