/* ============================================
   ENGINEERING — Dedicated page styles
   ============================================ */

.eng-hero {
  padding: 140px 0 40px;
  text-align: center;
}

.eng-hero__title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.eng-hero__subtitle {
  color: var(--color-text-muted);
  font-size: 1.1rem;
  line-height: 1.7;
  max-width: 620px;
  margin: 0 auto 36px;
}

.nav__link--active {
  color: #fff !important;
}

/* ---- AUTH (hero section) ---- */

.eng-auth {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.eng-auth__login {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: #000;
  color: rgba(255, 255, 255, 0.6);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.eng-auth__login:hover {
  border-color: rgba(255, 255, 255, 0.4);
  color: #fff;
}

.eng-auth__login svg {
  flex-shrink: 0;
}

.eng-auth__user {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: #000;
}

.eng-auth__avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
}

.eng-auth__name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
}

.eng-auth__signout {
  margin-left: 4px;
  padding: 4px 10px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-dim);
  font-family: var(--font-body);
  font-size: 0.78rem;
  cursor: pointer;
  transition: all 0.2s;
}

.eng-auth__signout:hover {
  border-color: var(--color-red, #e53e3e);
  color: var(--color-red, #e53e3e);
}

/* ---- LAYOUT (articles + roadmap sidebar) ---- */

.eng-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 48px;
  align-items: start;
}

.eng-layout__content {
  min-width: 0;
}

.eng-layout__sidebar {
  position: sticky;
  top: 88px;
}

/* ---- ROADMAP ---- */

.roadmap {
  background: linear-gradient(180deg, var(--color-bg-card), var(--color-bg));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 28px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
}

.roadmap__title {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-dim);
  margin-bottom: 24px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-border);
}

.roadmap__list {
  list-style: none;
  padding: 0;
  margin: 0;
  position: relative;
}

/* Vertical timeline line */
.roadmap__list::before {
  content: '';
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--color-border);
  border-radius: 1px;
}

.roadmap__item {
  display: flex;
  gap: 14px;
  padding: 8px 0;
  position: relative;
}

.roadmap__item:first-child {
  padding-top: 0;
}

.roadmap__item:last-child {
  padding-bottom: 0;
}

.roadmap__status {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  border-radius: 50%;
  position: relative;
  z-index: 1;
}

.roadmap__item--done .roadmap__status {
  color: var(--color-green);
  background: var(--color-bg);
  border: 2px solid var(--color-green);
  font-size: 0.65rem;
}

.roadmap__item--progress .roadmap__status {
  color: var(--color-accent-light);
  background: var(--color-accent-glow);
  border: 2px solid var(--color-accent-light);
  font-size: 0.6rem;
  box-shadow: 0 0 8px var(--color-accent-glow);
}

.roadmap__item--planned .roadmap__status {
  color: var(--color-text-dim);
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  font-size: 0.55rem;
}

.roadmap__item strong {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.35;
}

.roadmap__item--done strong {
  color: var(--color-text);
}

.roadmap__item--progress strong {
  color: var(--color-accent-light);
}

.roadmap__item--planned strong {
  color: var(--color-text-dim);
}

.roadmap__detail {
  display: block;
  font-size: 0.72rem;
  color: var(--color-text-dim);
  margin-top: 2px;
  font-family: var(--font-mono);
}

/* ---- EMPTY STATE ---- */

.eng-empty {
  text-align: center;
  padding: 64px 24px;
  color: var(--color-text-dim);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ---- COMMENTS ---- */

.comments {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
}

.comments__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.comment {
  display: flex;
  gap: 10px;
  padding: 10px 0;
}

.comment__avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  flex-shrink: 0;
}

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

.comment__header {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 4px;
}

.comment__name {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text);
}

.comment__date {
  font-size: 0.72rem;
  color: var(--color-text-dim);
}

.comment__text {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* Comment form */
.comments__form {
  margin-top: 12px;
}

.comments__form textarea {
  width: 100%;
  min-height: 60px;
  padding: 10px 12px;
  font-family: var(--font-body);
  font-size: 0.88rem;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  outline: none;
  resize: vertical;
  transition: border-color 0.2s;
}

.comments__form textarea:focus {
  border-color: var(--color-accent);
}

.comments__form-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 8px;
}

.comments__login-prompt {
  font-size: 0.82rem;
  color: var(--color-text-dim);
  text-align: center;
  padding: 12px 0;
}

/* ---- NOT FOR EVERYONE ---- */

.eng-audience {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.eng-audience__text {
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

/* ---- COLLABORATION ---- */

.eng-collab__desc {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 1.02rem;
  line-height: 1.75;
  margin-bottom: 36px;
}

.eng-collab__areas {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 32px;
}

.eng-collab__area {
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg-card);
}

.eng-collab__area h4 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.eng-collab__area p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.65;
}

.eng-collab__cta {
  text-align: center;
}

/* ---- RESPONSIVE ---- */

@media (max-width: 768px) {
  .eng-hero {
    padding: 100px 0 40px;
  }

  .eng-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .eng-layout__sidebar {
    position: static;
    order: -1;
  }

  .eng-collab__areas {
    grid-template-columns: 1fr;
  }
}