:root {
  /* ===== Brand Colors ===== */
  --color-primary: #E60012;
  --color-primary-dark: #C40010;
  --color-primary-light: #FF1A2E;
  --color-primary-50: #FFF1F1;
  --color-primary-100: #FFE0E0;
  --color-primary-200: #FFB3B3;
  --color-primary-600: #B3000E;
  --color-primary-700: #8A000B;
  --color-primary-800: #600007;

  /* ===== Neutral Colors ===== */
  --color-bg: #FFFFFF;
  --color-bg-secondary: #F5F5F5;
  --color-bg-tertiary: #EEEEEE;
  --color-surface: #FFFFFF;
  --color-surface-elevated: #FFFFFF;
  --color-border: #E0E0E0;
  --color-border-light: #F0F0F0;
  --color-text-primary: #1A1A1A;
  --color-text-secondary: #555555;
  --color-text-tertiary: #888888;
  --color-text-inverse: #FFFFFF;
  --color-text-on-primary: #FFFFFF;

  /* ===== Dark Sections ===== */
  --color-dark-bg: #1A1A1A;
  --color-dark-surface: #2A2A2A;
  --color-dark-text: #FFFFFF;
  --color-dark-text-secondary: #CCCCCC;
  --color-dark-border: #333333;

  /* ===== State Colors ===== */
  --state-success: #16A34A;
  --state-warning: #F59E0B;
  --state-error: #DC2626;
  --state-info: #2563EB;

  /* ===== Typography ===== */
  --font-display: "Source Han Sans CN", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-body: "Source Han Sans CN", "Noto Sans SC", "Microsoft YaHei", sans-serif;

  --text-xs: 12px;
  --text-sm: 13px;
  --text-base: 14px;
  --text-lg: 16px;
  --text-xl: 18px;
  --text-2xl: 20px;
  --text-3xl: 24px;
  --text-4xl: 30px;
  --text-5xl: 36px;
  --text-6xl: 48px;

  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;

  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;

  /* ===== Spacing ===== */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  /* ===== Radius ===== */
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;
  --radius-full: 9999px;

  /* ===== Shadows ===== */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.05);

  /* ===== Layout ===== */
  --container-max: 1200px;
  --container-wide: 1400px;
  --nav-height: 70px;
  --section-padding: 80px;
}

/* ===== Typography Classes ===== */
.senje-h1 {
  font-family: var(--font-display);
  font-size: var(--text-5xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

.senje-h2 {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

.senje-h3 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-snug);
  color: var(--color-text-primary);
}

.senje-h4 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-snug);
  color: var(--color-text-primary);
}

.senje-h5 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--font-medium);
  line-height: var(--leading-snug);
  color: var(--color-text-primary);
}

.senje-body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: var(--leading-normal);
  color: var(--color-text-secondary);
}

.senje-body-lg {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: var(--font-normal);
  line-height: var(--leading-relaxed);
  color: var(--color-text-secondary);
}

.senje-caption {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--font-normal);
  line-height: var(--leading-normal);
  color: var(--color-text-tertiary);
}

.senje-overline {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  line-height: var(--leading-normal);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ===== Language Dropdown ===== */
.lang-dropdown {
  position: absolute;
  top: calc(var(--nav-height) - 8px);
  right: 0;
  background-color: #ffffff;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 20px rgba(0,0,0,0.12);
  width: 100%;
  min-width: unset;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  z-index: 60;
  overflow: hidden;
}
.lang-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.lang-dropdown-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  cursor: pointer;
  transition: background-color 0.15s;
  text-decoration: none;
}
.lang-dropdown-item:hover {
  background-color: var(--color-primary-50);
  color: var(--color-primary);
}
.lang-dropdown-item.active {
  color: var(--color-primary);
  font-weight: var(--font-semibold);
}
.lang-dropdown-divider {
  height: 1px;
  background-color: var(--color-border-light);
  margin: 4px 0;
}