/* SPDX-License-Identifier: MIT */
/* Copyright (c) 2025-2026 Robworks Software LLC */

/* --- Guide Metadata Banner --- */

.guide-metadata {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  margin: 0.5rem 0 1.5rem;
  border-radius: 0.5rem;
  background: var(--md-code-bg-color);
  border: 1px solid var(--md-default-fg-color--lightest);
  font-size: 0.85rem;
}

/* Difficulty badges */
.meta-difficulty {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: 1rem;
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.meta-difficulty--beginner {
  background: color-mix(in srgb, #4caf50 20%, transparent);
  color: #2e7d32;
}

.meta-difficulty--intermediate {
  background: color-mix(in srgb, #ff9800 20%, transparent);
  color: #e65100;
}

.meta-difficulty--advanced {
  background: color-mix(in srgb, #f44336 20%, transparent);
  color: #c62828;
}

[data-md-color-scheme="slate"] .meta-difficulty--beginner {
  background: color-mix(in srgb, #66bb6a 20%, transparent);
  color: #81c784;
}

[data-md-color-scheme="slate"] .meta-difficulty--intermediate {
  background: color-mix(in srgb, #ffb74d 20%, transparent);
  color: #ffcc80;
}

[data-md-color-scheme="slate"] .meta-difficulty--advanced {
  background: color-mix(in srgb, #ef5350 20%, transparent);
  color: #ef9a9a;
}

/* Time estimate */
.meta-time {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  color: var(--md-default-fg-color--light);
}

.meta-time::before {
  content: "\23F1";
}

/* Prerequisites */
.meta-prerequisites {
  color: var(--md-default-fg-color--light);
}

.meta-prereq-link {
  color: var(--md-accent-fg-color);
  text-decoration: none;
}

.meta-prereq-link:hover {
  text-decoration: underline;
}

/* Tags */
.meta-tags {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin-left: auto;
}

.meta-tag {
  display: inline-block;
  padding: 0.1rem 0.5rem;
  border-radius: 0.75rem;
  background: var(--md-default-fg-color--lightest);
  color: var(--md-default-fg-color--light);
  font-size: 0.75rem;
}

/* Learning outcomes (collapsible) */
.meta-outcomes {
  width: 100%;
  margin-top: 0.25rem;
}

.meta-outcomes summary {
  cursor: pointer;
  color: var(--md-default-fg-color--light);
  font-size: 0.85rem;
}

.meta-outcomes ul {
  margin: 0.5rem 0 0;
  padding-left: 1.5rem;
}

.meta-outcomes li {
  color: var(--md-default-fg-color--light);
  font-size: 0.85rem;
  margin-bottom: 0.25rem;
}

/* --- Topic Progression Cards --- */

.topic-progression {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
  padding-left: 2rem;
}

/* Vertical connector line */
.topic-progression::before {
  content: "";
  position: absolute;
  left: 0.9rem;
  top: 1.5rem;
  bottom: 1.5rem;
  width: 2px;
  background: var(--md-default-fg-color--lightest);
}

/* Section headings within progression */
.topic-progression h3 {
  position: relative;
  margin: 1.25rem 0 0.25rem;
  padding-left: 0;
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--md-default-fg-color--light);
  background: var(--md-default-bg-color);
  z-index: 1;
}

.topic-card {
  position: relative;
  display: flex;
  gap: 1rem;
  padding: 1rem 1.25rem;
  margin: 0.25rem 0;
  border-radius: 0.5rem;
  background: var(--md-code-bg-color);
  border: 1px solid var(--md-default-fg-color--lightest);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.topic-card:hover {
  border-color: var(--md-accent-fg-color);
  box-shadow: 0 2px 8px color-mix(in srgb, var(--md-accent-fg-color) 15%, transparent);
}

.topic-card:focus-visible {
  outline: 2px solid var(--md-accent-fg-color);
  outline-offset: -1px;
}

/* Step number circle */
.topic-card__number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  min-width: 2rem;
  border-radius: 50%;
  background: var(--md-default-fg-color--lightest);
  color: var(--md-default-fg-color--light);
  font-weight: 700;
  font-size: 0.85rem;
}

.topic-card--completed .topic-card__number {
  background: var(--rb-color-correct-bg-strong);
  color: var(--rb-color-correct);
}

.topic-card__body {
  flex: 1;
  min-width: 0;
}

.topic-card__title {
  font-weight: 600;
  font-size: 1rem;
  margin: 0 0 0.25rem;
}

.topic-card__meta {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.8rem;
  color: var(--md-default-fg-color--light);
}

.topic-card__description {
  margin: 0.35rem 0 0;
  font-size: 0.85rem;
  color: var(--md-default-fg-color--light);
  line-height: 1.5;
}

/* Start Here badge */
.topic-card__badge {
  display: inline-block;
  padding: 0.1rem 0.5rem;
  border-radius: 0.75rem;
  background: var(--md-accent-fg-color);
  color: var(--md-accent-bg-color, #fff);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

/* Completion checkmark */
.topic-card__check {
  display: none;
  align-items: center;
  color: var(--rb-color-correct);
  font-size: 1.2rem;
}

.topic-card--completed .topic-card__check {
  display: flex;
}

/* Responsive */
@media (max-width: 600px) {
  .topic-progression {
    padding-left: 1.5rem;
  }

  .topic-card {
    padding: 0.75rem 1rem;
  }

  .topic-card__description {
    display: none;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .topic-card {
    transition: none;
  }
}