/* ===== HEADER (persistent module on all pages) ===== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  will-change: transform;
  height: var(--header-height);
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(0.5rem, 0.375rem + 0.5vw, 0.625rem) 8px;
  gap: clamp(0.5rem, 0.375rem + 0.5vw, 0.625rem);
  flex-wrap: nowrap;
  overflow: visible;
  width: 100%;
}

@media (min-width: 1025px) {
  .header { transition: transform 0.3s ease; }
}

.header-hidden { transform: translateY(-100%); }

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex: 1 1 auto;
  height: 100%;
  position: relative;
}

/* Header button (shared) */
.header-button {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 clamp(0.5rem, 0.375rem + 0.5vw, 0.625rem);
  height: 100%;
  color: var(--icon-color, var(--brand-primary));
  background: transparent;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.2s;
  flex-shrink: 0;
}

.header-button svg { width: 20px; height: 20px; fill: currentColor; }

@media (hover: hover) {
  .header-button:hover { opacity: 0.7; }
}

.header-button-active { color: var(--active-page-color); }
.header-button-active svg { color: var(--active-page-color); }

.header-search-desktop { display: flex; }

/* Logo (center) */
.header-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  flex-shrink: 0;
  height: 100%;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--brand-primary);
  text-decoration: none;
  letter-spacing: -0.5px;
  padding: 7px;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.header-logo:hover { color: var(--brand-hover); }
.header-logo-full { display: inline; }
.header-logo-short { display: none; }

/* Right buttons */
.header-right-buttons {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  justify-content: flex-end;
  padding-left: clamp(0.5rem, 0.375rem + 0.5vw, 0.625rem);
  height: 100%;
}

/* Header avatar */
.header-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  object-fit: cover;
}

.header-profile-btn {
  position: relative;
}

/* Mobile header */
@media (max-width: 768px) {
  .header-right-buttons { padding-left: 7px; }
}

@media (max-width: 300px) {
  .header-logo-full { display: none; }
  .header-logo-short { display: inline; }
}