body { font-family: var(--font-sans); font-size: var(--font-size-base); background: var(--bg-base); color: var(--text-primary) }

/* ── Header ── */
.header {
  position: sticky; top: 0; z-index: 100; display: flex; align-items: center; gap: 16px;
  padding: 0 24px; height: 56px;
  background: var(--bg-card); border-bottom: 1px solid var(--border-light);
  backdrop-filter: blur(8px);
}
.brand { display: flex; align-items: center; gap: 8px; font-size: 1.1rem; font-weight: 700; flex-shrink: 0 }
.brand-logo { width: 32px; height: 32px; display: block; flex-shrink: 0 }
.brand-name { letter-spacing: -.01em }
.brand-name strong {
  background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-nav { display: flex; gap: 4px; flex: 1; overflow-x: auto }
.nav-link {
  padding: 6px 12px; border-radius: var(--radius-full); font-size: .82rem; font-weight: 500;
  color: var(--text-secondary); white-space: nowrap; transition: background var(--t-fast), color var(--t-fast);
}
.nav-link:hover { background: var(--bg-overlay); color: var(--text-primary) }
.nav-link.active { background: var(--brand-green); color: #fff }

.nav-badge {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--brand-red); color: #fff;
  font-size: .58rem; font-weight: 800; line-height: 1;
  min-width: 15px; height: 15px; padding: 0 3px;
  border-radius: var(--radius-full); margin-left: 4px;
  vertical-align: middle; pointer-events: none;
  animation: badge-pop .2s ease;
}
.nav-badge:empty { display: none }
@keyframes badge-pop { 0%{transform:scale(0)} 60%{transform:scale(1.25)} 100%{transform:scale(1)} }

.header-actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0 }
.lang-switcher  { display: flex; gap: 2px }
.lang-btn {
  background: transparent; border: none; cursor: pointer; padding: 4px 7px;
  border-radius: var(--radius-sm); font-size: .78rem; color: var(--text-tertiary);
  transition: background var(--t-fast), color var(--t-fast);
}
.lang-btn.active, .lang-btn:hover { background: var(--bg-overlay); color: var(--text-primary); font-weight: 700 }

/* ── Container ── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px }

/* ── Toolbar ── */
.album-toolbar { border-bottom: 1px solid var(--border-light); padding: 10px 0; background: var(--bg-card) }
.toolbar-inner { display: flex; align-items: center; gap: 10px }
.toolbar-title { font-size: 1rem; font-weight: 700 }

/* ── Album main ── */
.album-main { padding: 24px 20px }

/* ── Utilities ── */
.text-secondary { color: var(--text-secondary) }
.text-tertiary  { color: var(--text-tertiary) }

/* ── Nav share ── */
.nav-link.nav-share { color: #25d366 }
.nav-link.nav-share:hover { background: rgba(37,211,102,.1); color: #25d366 }

@media (max-width: 640px) {
  .header { padding: 0 10px; gap: 6px }
  .container { padding: 0 12px }
  .album-main { padding: 16px 12px }
}

/* Colapsar nav a hamburguesa cuando ya no entra cómodo (7 ítems + acciones) */
@media (max-width: 900px) {
  .header-nav                    { display: none }
  .header-actions > a            { display: none }       /* username + logout */
  .header-actions .lang-switcher { display: none }       /* lang switcher */
  .header-actions { margin-left: auto } /* empujar acciones a la derecha */
}

/* ── Botón hamburguesa ── */
.hamburger-btn {
  display: none;
  flex-direction: column; justify-content: center; gap: 5px;
  background: none; border: none; cursor: pointer;
  width: 36px; height: 36px; padding: 7px 8px;
  flex-shrink: 0; /* no se achica en el flex del header */
  border-radius: var(--radius-sm);
  transition: background var(--t-fast);
}
.hamburger-btn:hover { background: var(--bg-overlay) }
.hamburger-btn span {
  display: block; width: 20px; height: 2px;
  background: var(--text-primary); border-radius: 2px;
  transition: transform .22s ease, opacity .18s ease;
  transform-origin: center;
}
.hamburger-btn.open span:nth-child(1) { transform: translateY(7px) rotate(45deg) }
.hamburger-btn.open span:nth-child(2) { opacity: 0; transform: scaleX(0) }
.hamburger-btn.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg) }
@media (max-width: 900px) { .hamburger-btn { display: flex } }

/* ── Overlay de navegación móvil ── */
.mobile-nav-overlay {
  display: none;
  position: fixed; inset: 56px 0 0 0; z-index: 99;
  background: var(--bg-base); overflow-y: auto;
}
.mobile-nav-overlay.open {
  display: flex; flex-direction: column;
  animation: mobileNavIn .18s ease;
}
@keyframes mobileNavIn {
  from { opacity: 0; transform: translateY(-8px) }
  to   { opacity: 1; transform: none }
}
.mobile-nav-inner {
  flex: 1; display: flex; flex-direction: column;
  padding: 14px 14px 32px;
}
.mobile-nav-user {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 16px; margin-bottom: 14px;
  border-radius: var(--radius-md); border: 1px solid var(--border-light);
  font-weight: 700; font-size: 1rem; color: var(--text-primary);
  background: var(--bg-card);
}
.mobile-nav-links { display: flex; flex-direction: column; gap: 2px }
.mobile-nav-link {
  display: flex; align-items: center; gap: 12px;
  padding: 13px 16px; border-radius: var(--radius-md);
  font-size: 1rem; font-weight: 600; color: var(--text-secondary);
  transition: background var(--t-fast), color var(--t-fast);
}
.mobile-nav-link:hover { background: var(--bg-card); color: var(--text-primary) }
.mobile-nav-link.active { background: var(--brand-primary); color: #fff }
.mobile-nav-link.nav-share { color: #25d366 }
.mobile-nav-link.nav-share:hover { background: rgba(37,211,102,.1) }
.mnav-icon { font-size: 1.1rem; width: 24px; text-align: center; flex-shrink: 0 }
.mobile-nav-divider { height: 1px; background: var(--border-light); margin: 14px 0 }
.mobile-nav-footer {
  display: flex; align-items: center; gap: 8px; padding: 4px 0;
}

/* ── Footer ── */
.app-footer {
  text-align: center; padding: 20px 16px 28px;
  font-size: .72rem; color: var(--text-tertiary);
  border-top: 1px solid var(--border-light); margin-top: 48px; line-height: 1.8;
}
.app-footer a { color: var(--brand-primary); text-decoration: none }
.app-footer a:hover { text-decoration: underline }

/* ── Beta tag ── */
.beta-tag {
  display: inline-flex; align-items: center;
  background: rgba(245,158,11,.12); color: var(--brand-amber);
  border: 1px solid rgba(245,158,11,.25);
  font-size: .58rem; font-weight: 800; letter-spacing: .08em;
  padding: 2px 7px; border-radius: var(--radius-full);
  text-transform: uppercase; flex-shrink: 0;
}

/* ── Feedback nav link ── */
.nav-link.nav-feedback { color: var(--brand-blue) }
.nav-link.nav-feedback:hover { background: rgba(91,156,246,.08); color: var(--brand-blue) }
.mobile-nav-link.nav-feedback { color: var(--brand-blue) }