/* ============================================================
   UNMOZI Website - Layout: Container, Nav, Footer, Buttons
   ============================================================ */

/* ===== Container ===== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

/* ===== Section Base ===== */
.section {
  padding-top: var(--space-20);
  padding-bottom: var(--space-20);
  position: relative;
}

.section--dark {
  background-color: var(--color-bg-secondary);
}

.section--reverse .section__grid {
  flex-direction: row-reverse;
}

/* Section header shared */
.section__header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section__label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--color-accent-400);
  margin-bottom: var(--space-3);
}

.section__title {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
  letter-spacing: var(--tracking-tight);
}

.section__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.section__grid {
  display: flex;
  gap: var(--space-16);
  align-items: center;
}

.section__visual {
  flex: 1;
  min-width: 0;
}

.section__info {
  flex: 1;
  min-width: 0;
}

/* ===== Header & Navigation ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-header);
  transition: background-color var(--transition-base),
              box-shadow var(--transition-base),
              backdrop-filter var(--transition-base);
}

.header--scrolled {
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--color-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  z-index: var(--z-dropdown);
}

.nav__logo-icon {
  width: 36px;
  height: 36px;
}

.nav__logo-text {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-primary);
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav__link {
  display: block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  border-radius: var(--radius-md);
  transition: color var(--transition-fast),
              background-color var(--transition-fast);
  position: relative;
}

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

.nav__link--active {
  color: var(--color-accent-400);
}

.nav__link--active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--color-accent-400);
  border-radius: var(--radius-full);
}

.nav__right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  z-index: var(--z-dropdown);
}

.nav__lang {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav__lang-btn {
  padding: var(--space-2) var(--space-1);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-muted);
  background: none;
  transition: color var(--transition-fast);
}

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

.nav__lang-btn--active {
  color: var(--color-accent-400);
}

.nav__lang-divider {
  font-size: var(--text-sm);
  color: var(--color-border);
  user-select: none;
}

.nav__app {
  position: relative;
}

.nav__app-btn {
  display: block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  letter-spacing: var(--tracking-wide);
  border-radius: var(--radius-md);
  white-space: nowrap;
  background: none;
  transition: color var(--transition-fast),
              background-color var(--transition-fast);
}

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

.nav__app--open .nav__app-btn {
  color: var(--color-accent-400);
}

.nav__app-dropdown {
  position: absolute;
  top: calc(100% + var(--space-3));
  right: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-5);
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--transition-fast),
              visibility var(--transition-fast),
              transform var(--transition-fast);
}

.nav__app-dropdown[hidden] {
  display: none;
}

.nav__app--open .nav__app-dropdown {
  display: flex;
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav__app-qr {
  display: block;
  width: 160px;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  flex-shrink: 0;
  max-width: none;
  border-radius: var(--radius-md);
}

.nav__app-hint {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-align: center;
  white-space: nowrap;
}

/* Mobile toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  z-index: var(--z-dropdown);
  cursor: pointer;
}

.nav__toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: transform var(--transition-base),
              opacity var(--transition-base);
  transform-origin: center;
}

/* Hamburger animation to X */
.nav__toggle--active .nav__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle--active .nav__toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav__toggle--active .nav__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  cursor: pointer;
  white-space: nowrap;
  letter-spacing: var(--tracking-normal);
}

.btn--primary {
  background: var(--gradient-accent);
  color: #ffffff;
  box-shadow: 0 2px 12px rgba(249, 115, 22, 0.3);
}

.btn--primary:hover {
  background: var(--gradient-accent-hover);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(249, 115, 22, 0.4);
  transform: translateY(-1px);
}

.btn--outline {
  border: 1px solid rgba(0, 0, 0, 0.15);
  color: var(--color-text-primary);
  background: transparent;
}

.btn--outline:hover {
  border-color: var(--color-accent-400);
  color: var(--color-accent-400);
  background: rgba(249, 115, 22, 0.05);
}

.btn--ghost {
  color: var(--color-text-secondary);
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

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

.btn--full {
  width: 100%;
}

.btn--loading {
  pointer-events: none;
  position: relative;
  color: transparent !important;
}

.btn--loading::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.btn--loading .btn__text {
  visibility: hidden;
}

/* ===== Footer ===== */
.footer {
  background-color: var(--color-bg-primary);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

.footer__grid {
  display: grid;
  grid-template-columns: minmax(220px, 2fr) repeat(4, 1fr);
  gap: var(--space-10);
}

.footer__brand {
  max-width: 360px;
}

.footer__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  color: var(--color-text-primary);
  transition: opacity var(--transition-fast);
}

.footer__logo-link:hover {
  opacity: 0.8;
}

.footer__logo {
  width: 32px;
  height: 32px;
}

.footer__logo-text {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  letter-spacing: var(--tracking-tight);
}

.footer__social {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer__social-link:hover {
  color: var(--color-text-secondary);
}

.footer__social-link svg {
  width: 20px;
  height: 20px;
}

.footer__legal {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer__legal p {
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  color: var(--color-text-muted);
}

.footer__legal a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer__legal a:hover {
  color: var(--color-text-secondary);
}

.footer__beian-police {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.footer__police-icon {
  flex-shrink: 0;
}

.footer__col-title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-5);
}

.footer__col-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__col-links a {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.footer__col-links a:hover {
  color: var(--color-text-primary);
}