/* ============================================================
   COURSES SITE — shared component styles.
   Reused across index.html (catalogue), login.html, my-courses.html,
   and lesson.html. Token-driven so it re-themes with space.css.
   ============================================================ */

html { scroll-behavior: smooth; }

/* ---- Page hero (matches store.html's hero treatment) ---- */
.page-hero { max-width: 42rem; }

/* ---- Course grid + card (mirrors amarkhade/store.html's product-card) ---- */
.course-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1.6rem; margin-top: 2.75rem; }
.course-loading { grid-column: 1 / -1; padding: 1.5rem 0; }
.course-card { position: relative; display: flex; flex-direction: column; background: color-mix(in srgb, var(--color-surface) 85%, transparent); border: 1px solid var(--color-line); border-radius: 1rem; overflow: hidden; transition: border-color .18s, transform .18s, box-shadow .18s; }
.course-card:hover { border-color: var(--color-accent); transform: translateY(-4px); box-shadow: 0 12px 28px rgba(0,0,0,.35); }

.course-cover { position: relative; aspect-ratio: 16/9; background: var(--color-paper); border-bottom: 1px solid var(--color-line); overflow: hidden; display: flex; align-items: center; justify-content: center; }
.course-cover svg { width: 34px; height: 34px; opacity: .55; color: var(--color-muted); }

.course-badge { position: absolute; top: .75rem; left: .75rem; z-index: 1; display: inline-flex; align-items: center; gap: .35rem; background: color-mix(in srgb, var(--color-paper) 78%, transparent); backdrop-filter: blur(4px); border: 1px solid var(--color-line); color: var(--color-muted); border-radius: 999px; padding: .3rem .65rem; font-size: .72rem; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; }
.course-badge.live { color: var(--color-accent); border-color: color-mix(in srgb, var(--color-accent) 45%, transparent); }

.course-info { padding: 1.15rem 1.2rem 1.35rem; display: flex; flex-direction: column; flex: 1; }
.course-title { font-size: 1.12rem; line-height: 1.35; margin: 0 0 .4rem; color: var(--color-ink); }
.course-blurb { font-size: .88rem; line-height: 1.6; color: var(--color-muted); margin: 0 0 1rem; flex: 1; }
.course-meta { display: flex; gap: .9rem; font-size: .8rem; color: var(--color-muted); margin: 0 0 1rem; }
.course-meta span { display: inline-flex; align-items: center; gap: .3rem; }
.course-meta svg { width: 14px; height: 14px; flex: none; }
.course-price { font-size: .9rem; font-weight: 600; color: var(--color-ink); margin: 0 0 1rem; }
.course-price.tba { color: var(--color-muted); font-weight: 500; font-style: italic; }

/* Progress (my-courses.html enrolled cards) */
.course-progress { margin: 0 0 1rem; }
.course-progress-bar { height: 6px; border-radius: 999px; background: color-mix(in srgb, var(--color-line) 70%, transparent); overflow: hidden; }
.course-progress-bar span { display: block; height: 100%; border-radius: 999px; background: var(--color-accent); transition: width .3s ease; }
.course-progress-meta { display: flex; justify-content: space-between; margin-top: .4rem; font-size: .76rem; color: var(--color-muted); font-variant-numeric: tabular-nums; }

.course-actions { margin-top: auto; }
.course-btn { display: inline-flex; align-items: center; justify-content: center; gap: .4rem; width: 100%; border-radius: .55rem; padding: .6rem .9rem; font-size: .86rem; font-weight: 600; text-decoration: none; cursor: pointer; border: 1px solid transparent; transition: background .15s, border-color .15s, color .15s, opacity .15s; }
.course-btn.active { background: var(--color-accent); color: var(--color-paper); }
.course-btn.active:hover { background: var(--color-accent-dark); }
.course-btn.disabled { background: transparent; border-color: var(--color-line); color: var(--color-muted); cursor: not-allowed; }

/* ---- Auth card (login.html) ---- */
.auth-wrap { display: flex; align-items: center; justify-content: center; min-height: calc(100vh - 4rem); padding: 3rem 1.25rem; }
.auth-card { width: 100%; max-width: 26rem; background: color-mix(in srgb, var(--color-surface) 88%, transparent); border: 1px solid var(--color-line); border-radius: 1.1rem; padding: 2.1rem 2rem 2.25rem; box-shadow: 0 20px 50px rgba(0,0,0,.3); }
.auth-title { font-size: 1.6rem; margin: 0 0 .4rem; color: var(--color-ink); }
.auth-sub { font-size: .92rem; line-height: 1.55; color: var(--color-muted); margin: 0 0 1.75rem; }
.auth-tabs { display: flex; gap: .5rem; margin-bottom: 1.5rem; border-bottom: 1px solid var(--color-line); }
.auth-tab { flex: 1; background: none; border: none; border-bottom: 2px solid transparent; padding: .6rem .5rem; font-size: .88rem; font-weight: 600; color: var(--color-muted); cursor: pointer; font-family: inherit; transition: color .15s, border-color .15s; }
.auth-tab.active { color: var(--color-ink); border-bottom-color: var(--color-accent); }
.auth-tab:hover { color: var(--color-ink); }
.auth-field { display: flex; flex-direction: column; gap: .35rem; margin-bottom: 1.1rem; }
.auth-field label { font-size: .78rem; font-weight: 600; letter-spacing: .02em; color: var(--color-muted); }
.auth-field input { background: color-mix(in srgb, var(--color-paper) 60%, transparent); border: 1px solid var(--color-line); border-radius: .55rem; padding: .65rem .75rem; font-size: .94rem; color: var(--color-ink); font-family: inherit; transition: border-color .15s; }
.auth-field input:focus { outline: none; border-color: var(--color-accent); }
.auth-submit { width: 100%; margin-top: .3rem; border-radius: .6rem; padding: .75rem 1rem; font-size: .94rem; font-weight: 600; cursor: pointer; border: 1px solid transparent; background: var(--color-accent); color: var(--color-paper); font-family: inherit; transition: background .15s, opacity .15s; }
.auth-submit:hover { background: var(--color-accent-dark); }
.auth-note { display: none; margin-top: 1.1rem; padding: .75rem .9rem; border-radius: .6rem; font-size: .85rem; line-height: 1.55; background: color-mix(in srgb, var(--color-highlight) 14%, transparent); border: 1px solid color-mix(in srgb, var(--color-highlight) 40%, transparent); color: var(--color-ink); }
.auth-note.show { display: block; }
.auth-note.error { background: color-mix(in srgb, #ef4444 14%, transparent); border-color: color-mix(in srgb, #ef4444 45%, transparent); }
.auth-foot { margin: 1.5rem 0 0; text-align: center; font-size: .85rem; color: var(--color-muted); }
.auth-foot a { color: var(--color-accent); text-decoration: none; }
.auth-foot a:hover { text-decoration: underline; }
.auth-forgot { margin: .9rem 0 0; text-align: right; font-size: .82rem; }
.auth-forgot a { color: var(--color-muted); text-decoration: none; }
.auth-forgot a:hover { color: var(--color-accent); text-decoration: underline; }

/* ---- My Courses account bar ---- */
.account-bar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-top: 1.25rem; padding: .85rem 1.1rem; border: 1px solid var(--color-line); border-radius: .8rem; background: color-mix(in srgb, var(--color-surface) 55%, transparent); font-size: .85rem; color: var(--color-muted); }
.account-bar strong { color: var(--color-ink); font-weight: 600; }
.account-bar button { background: none; border: 1px solid var(--color-line); border-radius: .5rem; padding: .4rem .8rem; font-size: .82rem; font-weight: 600; color: var(--color-muted); cursor: pointer; font-family: inherit; transition: border-color .15s, color .15s; }
.account-bar button:hover { border-color: var(--color-accent); color: var(--color-ink); }

/* ---- Empty state (my-courses.html) ---- */
.empty-state { display: flex; flex-direction: column; align-items: center; text-align: center; gap: 1.1rem; max-width: 28rem; margin: 3rem auto 0; padding: 3rem 2rem; border: 1px dashed var(--color-line); border-radius: 1.1rem; background: color-mix(in srgb, var(--color-surface) 55%, transparent); }
.empty-state svg { width: 40px; height: 40px; color: var(--color-muted); opacity: .8; }
.empty-state h2 { font-size: 1.3rem; margin: 0; color: var(--color-ink); }
.empty-state p { margin: 0; font-size: .92rem; line-height: 1.6; color: var(--color-muted); }

/* ---- Course overview (course.html) ---- */
.course-overview-hero { max-width: 44rem; margin-top: 1rem; }
.course-overview-hero .course-badge { margin-bottom: 1rem; }
.course-overview-hero h1 { font-size: 2.4rem; line-height: 1.1; margin: 0 0 1rem; color: var(--color-ink); }
@media (max-width: 640px) { .course-overview-hero h1 { font-size: 1.9rem; } }
.course-overview-hero .course-meta { margin: 0 0 1.1rem; }
.co-blurb { font-size: 1.05rem; line-height: 1.65; color: var(--color-muted); margin: 0 0 1.75rem; }
.co-cta { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; }
.co-cta .btn-primary[disabled] { opacity: .55; cursor: not-allowed; }

.btn-secondary { display: inline-flex; align-items: center; justify-content: center; gap: .45rem; border-radius: .6rem; padding: .7rem 1.15rem; font-size: .92rem; font-weight: 600; text-decoration: none; cursor: pointer; border: 1px solid var(--color-line); color: var(--color-ink); background: transparent; transition: border-color .15s, color .15s, background .15s; }
.btn-secondary:hover { border-color: var(--color-accent); color: var(--color-accent); }
.btn-secondary svg { width: 15px; height: 15px; }

.curriculum { margin-top: 3.5rem; }
.curriculum-heading { font-size: 1.5rem; margin: 0 0 1rem; color: var(--color-ink); }
.curriculum-note { margin: 0 0 1.5rem; padding: .75rem .95rem; border-radius: .6rem; font-size: .88rem; line-height: 1.55; color: var(--color-ink); background: color-mix(in srgb, var(--color-highlight) 12%, transparent); border: 1px solid color-mix(in srgb, var(--color-highlight) 35%, transparent); max-width: 44rem; }

.module-block { border: 1px solid var(--color-line); border-radius: 1rem; overflow: hidden; margin-bottom: 1.1rem; background: color-mix(in srgb, var(--color-surface) 55%, transparent); }
.module-head { padding: 1rem 1.2rem; border-bottom: 1px solid var(--color-line); background: color-mix(in srgb, var(--color-surface) 40%, transparent); }
.module-head h3 { font-size: 1.05rem; margin: 0; color: var(--color-ink); }
.module-head p { margin: .35rem 0 0; font-size: .86rem; line-height: 1.55; color: var(--color-muted); }
.module-lessons { display: flex; flex-direction: column; }
.module-empty { margin: 0; padding: 1rem 1.2rem; font-size: .86rem; color: var(--color-muted); font-style: italic; }

.curr-lesson { display: flex; align-items: center; gap: .75rem; padding: .8rem 1.2rem; font-size: .92rem; color: var(--color-muted); text-decoration: none; border-top: 1px solid color-mix(in srgb, var(--color-line) 55%, transparent); transition: background .15s, color .15s; }
.module-lessons .curr-lesson:first-child { border-top: none; }
.curr-lesson.unlocked { color: var(--color-ink); }
a.curr-lesson:hover { background: color-mix(in srgb, var(--color-surface) 60%, transparent); color: var(--color-accent); }
.curr-icon { display: inline-flex; width: 18px; height: 18px; flex: none; color: var(--color-muted); }
.curr-lesson.unlocked .curr-icon { color: var(--color-accent); }
.curr-lesson.done .curr-icon { color: var(--color-success, #34d399); }
.curr-icon svg { width: 18px; height: 18px; }
.curr-title { flex: 1; }
.curr-dur { font-size: .8rem; color: var(--color-muted); font-variant-numeric: tabular-nums; }
.curr-tag { font-size: .68rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--color-accent); border: 1px solid color-mix(in srgb, var(--color-accent) 45%, transparent); border-radius: 999px; padding: .12rem .5rem; }

/* ---- Gated lesson layout (lesson.html) ---- */
.lesson-layout { display: grid; grid-template-columns: 1fr 300px; gap: 2.5rem; align-items: start; margin-top: 2.5rem; }
@media (max-width: 860px) { .lesson-layout { grid-template-columns: 1fr; } }

.lesson-crumb { font-size: .85rem; color: var(--color-muted); margin: 0 0 .5rem; }
.lesson-crumb a { color: var(--color-muted); text-decoration: none; }
.lesson-crumb a:hover { color: var(--color-accent); }

.lesson-player { position: relative; aspect-ratio: 16/9; border-radius: 1rem; overflow: hidden; border: 1px solid var(--color-line); background: linear-gradient(160deg, color-mix(in srgb, var(--color-surface) 92%, transparent), var(--color-paper)); display: flex; align-items: center; justify-content: center; }
.lesson-lock { display: flex; flex-direction: column; align-items: center; gap: 1rem; text-align: center; padding: 2rem; }
.lesson-lock-icon { width: 52px; height: 52px; display: flex; align-items: center; justify-content: center; border-radius: 999px; background: color-mix(in srgb, var(--color-paper) 60%, transparent); border: 1px solid var(--color-line); color: var(--color-accent); }
.lesson-lock-icon svg { width: 24px; height: 24px; }
.lesson-lock h2 { font-size: 1.2rem; margin: 0; color: var(--color-ink); }
.lesson-lock p { margin: 0; font-size: .88rem; color: var(--color-muted); max-width: 22rem; }

.lesson-header { margin-top: 1.5rem; }
.lesson-header h1 { font-size: 1.75rem; margin: 0 0 .5rem; }
.lesson-header p { margin: 0; font-size: .95rem; line-height: 1.6; color: var(--color-muted); max-width: 40rem; }

.lesson-sidebar { border: 1px solid var(--color-line); border-radius: 1rem; background: color-mix(in srgb, var(--color-surface) 70%, transparent); padding: 1.25rem; }
.lesson-sidebar h3 { font-size: .78rem; text-transform: uppercase; letter-spacing: .12em; color: var(--color-muted); font-weight: 600; margin: 0 0 1rem; }
.lesson-list { display: flex; flex-direction: column; gap: .35rem; }
.lesson-item { display: flex; align-items: center; gap: .65rem; padding: .6rem .65rem; border-radius: .6rem; font-size: .88rem; color: var(--color-muted); text-decoration: none; transition: background .15s, color .15s; }
.lesson-item:hover { background: color-mix(in srgb, var(--color-surface) 60%, transparent); }
.lesson-item.current { background: color-mix(in srgb, var(--color-accent) 12%, transparent); color: var(--color-ink); }
.lesson-item.unlocked { color: var(--color-ink); }
.lesson-item.unlocked svg { color: var(--color-accent); }
.lesson-item svg { width: 16px; height: 16px; flex: none; }
.lesson-item .num { font-variant-numeric: tabular-nums; opacity: .7; width: 1.2rem; }

.lesson-player.unlocked { background: linear-gradient(160deg, color-mix(in srgb, var(--color-accent) 18%, transparent), var(--color-paper)); }
.lesson-unlocked-msg { display: flex; flex-direction: column; align-items: center; gap: .75rem; text-align: center; padding: 2rem; }
.lesson-unlocked-msg h2 { font-size: 1.2rem; margin: 0; color: var(--color-ink); }
.lesson-unlocked-msg p { margin: 0; font-size: .88rem; color: var(--color-muted); max-width: 22rem; }
.lesson-unlocked-msg svg { width: 30px; height: 30px; color: var(--color-accent); }

/* Video embed fills the 16:9 player. */
.lesson-player.has-video { background: #000; }
.lesson-player iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

/* Actions: prev/next + mark complete. */
.lesson-actions { margin-top: 1.5rem; }
.lesson-actions-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem; padding-bottom: 1.5rem; border-bottom: 1px solid var(--color-line); }
.lesson-nav { display: flex; gap: .6rem; }
.lesson-nav-btn { display: inline-flex; align-items: center; border: 1px solid var(--color-line); border-radius: .55rem; padding: .5rem .85rem; font-size: .85rem; font-weight: 600; color: var(--color-ink); text-decoration: none; transition: border-color .15s, color .15s; }
.lesson-nav-btn:hover { border-color: var(--color-accent); color: var(--color-accent); }
.lesson-nav-btn.disabled { color: var(--color-muted); opacity: .45; pointer-events: none; }
.mark-complete { display: inline-flex; align-items: center; gap: .45rem; background: var(--color-accent); color: var(--color-paper); border: 1px solid transparent; border-radius: .55rem; padding: .55rem 1rem; font-size: .86rem; font-weight: 600; cursor: pointer; font-family: inherit; transition: background .15s, opacity .15s; }
.mark-complete:hover { background: var(--color-accent-dark); }
.mark-complete:disabled { opacity: .6; cursor: default; }
.mark-complete.done { background: transparent; color: var(--color-success, #34d399); border-color: color-mix(in srgb, var(--color-success, #34d399) 45%, transparent); }
.mark-complete svg { width: 16px; height: 16px; }

/* Markdown notes. */
.prose-notes { margin-top: 1.75rem; font-size: .96rem; line-height: 1.7; color: var(--color-ink); max-width: 44rem; }
.prose-notes:empty { margin: 0; }
.prose-notes h1, .prose-notes h2, .prose-notes h3 { font-family: var(--font-display, inherit); color: var(--color-ink); line-height: 1.25; margin: 1.6rem 0 .6rem; }
.prose-notes h1 { font-size: 1.5rem; } .prose-notes h2 { font-size: 1.25rem; } .prose-notes h3 { font-size: 1.08rem; }
.prose-notes p { margin: 0 0 1rem; color: var(--color-muted); }
.prose-notes a { color: var(--color-accent); text-decoration: underline; text-underline-offset: 2px; }
.prose-notes ul, .prose-notes ol { margin: 0 0 1rem 1.3rem; color: var(--color-muted); }
.prose-notes li { margin: .3rem 0; }
.prose-notes code { background: color-mix(in srgb, var(--color-surface) 70%, transparent); border: 1px solid var(--color-line); border-radius: .3rem; padding: .1rem .35rem; font-size: .88em; }
.prose-notes pre { background: color-mix(in srgb, var(--color-surface) 70%, transparent); border: 1px solid var(--color-line); border-radius: .6rem; padding: 1rem; overflow-x: auto; margin: 0 0 1rem; }
.prose-notes pre code { background: none; border: 0; padding: 0; }
.prose-notes blockquote { border-left: 3px solid var(--color-accent); margin: 0 0 1rem; padding: .2rem 0 .2rem 1rem; color: var(--color-muted); font-style: italic; }
.prose-notes img { max-width: 100%; border-radius: .6rem; }

/* Downloads / resources. */
.lesson-resources:empty { display: none; }
.resources-heading { font-size: .78rem; text-transform: uppercase; letter-spacing: .12em; color: var(--color-muted); font-weight: 600; margin: 2rem 0 .8rem; }
.resource-list { display: flex; flex-direction: column; gap: .5rem; max-width: 44rem; }
.resource-item { display: flex; align-items: center; gap: .7rem; padding: .7rem .9rem; border: 1px solid var(--color-line); border-radius: .6rem; text-decoration: none; color: var(--color-ink); background: color-mix(in srgb, var(--color-surface) 55%, transparent); transition: border-color .15s, color .15s; }
a.resource-item:hover { border-color: var(--color-accent); color: var(--color-accent); }
.resource-item.disabled { opacity: .55; }
.resource-file svg, .resource-dl svg { width: 17px; height: 17px; }
.resource-file { color: var(--color-muted); display: inline-flex; }
.resource-label { flex: 1; font-size: .9rem; }
.resource-dl { color: var(--color-accent); display: inline-flex; }

/* Sidebar module grouping + states. */
.sidebar-module { margin-bottom: 1rem; }
.sidebar-module h4 { font-size: .74rem; text-transform: uppercase; letter-spacing: .08em; color: var(--color-muted); font-weight: 700; margin: 0 0 .4rem; padding: 0 .65rem; opacity: .85; }
.lesson-item.done svg { color: var(--color-success, #34d399); }
.lesson-locked-note { display: flex; align-items: center; gap: .55rem; padding: .7rem .65rem; margin-top: .35rem; font-size: .82rem; color: var(--color-muted); border-top: 1px dashed var(--color-line); }
.lesson-locked-note svg { width: 15px; height: 15px; flex: none; }