/* ==========================================================================
   Components: header, navigation, language select, buttons, banner, stepper
   ========================================================================== */

/* Header */
.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
}

.brand-logo {
  width: 3rem;
  height: 3rem;
  border-radius: 14px;
  object-fit: cover;
  box-shadow: var(--shadow-1);
  border: 1px solid var(--border);
}

.brand-text h1 {
  font-size: var(--fs-lg);
  font-weight: 750;
  letter-spacing: -0.02em;
  line-height: 1.2;
  text-wrap: balance;
}

.brand-text p {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  text-wrap: balance;
}

.header-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  margin-inline-start: auto;
}

.nav-tabs {
  display: flex;
  gap: var(--space-1);
  padding: 4px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
}

.nav-tab {
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-2);
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.nav-tab:hover {
  color: var(--text);
  background: var(--surface-2);
}

.nav-tab[aria-current="page"] {
  color: var(--accent);
  background: var(--accent-soft);
}

/* Language select */
.lang-select {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding-inline: var(--space-3);
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-2);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.lang-select:hover {
  border-color: var(--border-strong);
}

.lang-select:focus-within {
  border-color: var(--accent);
  box-shadow: var(--ring);
}

.lang-select select {
  appearance: none;
  background: transparent;
  border: 0;
  outline: 0;
  padding-block: 0.5rem;
  padding-inline-end: 1.4rem;
  font-size: var(--fs-sm);
  font-weight: 600;
  cursor: pointer;
  color: var(--text);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23888'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right center;
  background-size: 1.1rem;
}

.lang-select select option {
  background-color: var(--surface);
  color: var(--text);
  padding: 8px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.65rem 1.1rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: var(--fs-sm);
  font-weight: 650;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 14px rgb(100 60 240 / 0.35);
}

.btn-primary:hover {
  filter: brightness(1.08);
  color: #ffffff;
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border-strong);
}

.btn-secondary:hover {
  background: var(--surface-2);
  color: var(--text);
}

.btn-ghost {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent-soft);
}

.btn-ghost:hover {
  background: var(--accent-soft);
}

.btn[data-state="done"] {
  background: transparent;
  color: var(--success);
  border-color: var(--success);
  box-shadow: none;
}

.btn-lg {
  padding: 0.85rem 1.5rem;
  font-size: var(--fs-base);
}

/* Guide banner */
.banner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--accent-soft), transparent);
  border: 1px solid var(--accent-soft);
}

.banner-body {
  display: flex;
  gap: var(--space-3);
  flex: 1 1 18rem;
}

.banner-body .icon {
  width: 1.6rem;
  height: 1.6rem;
  color: var(--accent);
  margin-top: 2px;
}

.banner h2 {
  font-size: var(--fs-base);
  font-weight: 700;
}

.banner p {
  font-size: var(--fs-sm);
  color: var(--text-2);
}

/* Stepper */
.stepper {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.stepper li {
  counter-increment: step;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-muted);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.stepper li::before {
  content: counter(step);
  display: grid;
  place-items: center;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 50%;
  flex-shrink: 0;
  font-size: 0.8rem;
  background: var(--surface-2);
  color: var(--text-2);
}

.stepper li[data-status="current"] {
  color: var(--text);
  border-color: var(--accent);
}

.stepper li[data-status="current"]::before {
  background: var(--accent);
  color: var(--accent-contrast);
}

.stepper li[data-status="done"] {
  color: var(--success);
  border-color: var(--success);
}

.stepper li[data-status="done"]::before {
  content: "\2713";
  background: var(--success);
  color: var(--bg);
}

@media (max-width: 40rem) {
  .stepper li {
    flex-direction: column;
    text-align: center;
    padding-inline: var(--space-2);
  }

  .header-actions {
    width: 100%;
    justify-content: space-between;
  }
}