/**
 * Homepage v2.0 - Header Styles
 * @description Sticky header with glassmorphism, desktop/mobile nav, mobile menu
 * @task Homepage Full Redesign
 * @version 1.0.0
 * @date 2026-02-16
 */

/* ==========================================================================
   Sticky Header
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky, 20);
  height: var(--header-h, 56px);
  background: var(--color-bg);
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  background: color-mix(in srgb, var(--color-bg) 80%, transparent);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: transparent;
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1rem;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

/* ==========================================================================
   Logo (SVG — adaptive: mark on mobile, wordmark on desktop)
   ========================================================================== */

.logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.logo-wordmark {
  display: none;
  height: 22px;
  width: auto;
}

.logo-mark {
  display: block;
  width: 28px;
  height: 28px;
}

@media (min-width: 1024px) {
  .logo-wordmark {
    display: block;
  }
  .logo-mark {
    display: none;
  }
}

/* ==========================================================================
   Desktop Navigation
   ========================================================================== */

.nav-desktop {
  display: none;
  gap: 0.25rem;
}

.nav-desktop a {
  font-size: var(--text-xs);
  font-weight: var(--font-weight-bold, 700);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-md, 8px);
  transition: all var(--transition-normal);
}

.nav-desktop a:hover {
  background: var(--color-surface);
  color: var(--color-brand-accent);
}

/* ==========================================================================
   Header Buttons
   ========================================================================== */

.header-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md, 8px);
  transition: all var(--transition-normal);
}

.header-btn:hover {
  background: var(--color-surface);
}

.header-btn svg {
  width: 18px;
  height: 18px;
}

/* Language Select */
.lang-select {
  font-size: var(--text-xs);
  font-weight: var(--font-weight-black, 800);
  letter-spacing: 0.08em;
  padding: 4px 24px 4px 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full, 20px);
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  display: none;
  min-width: 50px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 6px center;
}

.lang-select option {
  background: var(--color-bg-elevated, #1a1a1a);
  color: var(--color-text, #fff);
}

/* Login Button */
.login-btn {
  font-size: var(--text-xs);
  font-weight: var(--font-weight-black, 800);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.4rem 1rem;
  background: var(--color-brand-accent);
  color: #000;
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
  display: none;
}

.login-btn:hover {
  background: #F0D060;
}

/* ==========================================================================
   Responsive — Desktop (1024px+)
   ========================================================================== */

@media (min-width: 1024px) {
  .nav-desktop {
    display: flex;
  }

  .hamburger-btn {
    display: none;
  }

  .lang-select,
  .login-btn {
    display: block;
  }
}

/* ==========================================================================
   Mobile Menu
   ========================================================================== */

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay, 30);
  background: var(--color-bg);
  transform: translateX(-100%);
  transition: transform 350ms cubic-bezier(0.4, 0, 0.2, 1);
  padding: 4rem 1.5rem 1.5rem;
  overflow-y: auto;
}

.mobile-menu.open {
  transform: translateX(0);
}

.mobile-menu-close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-menu nav a {
  display: block;
  font-size: var(--text-xl);
  font-weight: var(--font-weight-bold, 700);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border);
}

.mobile-menu nav a:hover {
  color: var(--color-brand-accent);
}

/* Mobile Menu Overlay */
.mobile-overlay {
  position: fixed;
  inset: 0;
  z-index: 29; /* just below mobile-menu */
  background: rgba(0, 0, 0, 0.6);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.mobile-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

/* ==========================================================================
   Theme Toggle Icons
   ========================================================================== */

.dark-theme .ico-sun { display: block; }
.dark-theme .ico-moon { display: none; }
.light-theme .ico-sun { display: none; }
.light-theme .ico-moon { display: block; }

/* Light theme: dark arrow for lang-select */
.light-theme .lang-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23222' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
}

/* ==========================================================================
   INK-DEV-147 Phase 1 — Favorites heart icon
   ========================================================================== */

.header-btn--fav svg {
  transition: fill 0.2s ease, stroke 0.2s ease;
}

.header-btn--fav.is-filled svg {
  fill: var(--color-primary, #e11d48);
  stroke: var(--color-primary, #e11d48);
}

.header-btn--fav:hover svg {
  stroke: var(--color-primary, #e11d48);
}

.bnav-item--fav svg {
  transition: fill 0.2s ease, stroke 0.2s ease;
}

.bnav-item--fav.is-filled svg {
  fill: var(--color-primary, #e11d48);
  stroke: var(--color-primary, #e11d48);
}