:root {
  --blue:      #0F4C82;
  --blue-dark: #0a3a65;
  --blue-dim:  rgba(15,76,130,0.09);
  --blue-pale: #F0F8FE;
  --black:     #040404;
  --white:     #ffffff;
  --off-white: #F0F8FE;
  --grey:      #6b7280;
  --grey-light:#e5edf5;
  --border:    #ccd8e6;
  --font-main: 'Barlow', sans-serif;
  --font-cond: 'Barlow Condensed', sans-serif;
  --logo-w:    153px;
  --logo-h:    45px;
  --header-h:  72px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
[id] { scroll-margin-top: calc(var(--header-h) + 20px); }
body { background: var(--off-white); color: var(--black); font-family: var(--font-main); font-size: 16px; line-height: 1.65; }

/* ── HEADER ── */
header { height: var(--header-h); background: var(--black); position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 12px rgba(0,0,0,0.4); }
.header-inner { max-width: 1200px; margin: 0 auto; padding: 0 2.5rem; height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.header-left { display: flex; align-items: center; gap: 1.5rem; }
.logo-slot { width: var(--logo-w); height: var(--logo-h); flex-shrink: 0; display: flex; align-items: center; }
.logo-slot img { width: var(--logo-w); height: var(--logo-h); object-fit: contain; object-position: left center; display: block; }
.hdivider { width: 1px; height: 28px; background: rgba(255,255,255,0.16); flex-shrink: 0; }
.header-title h1 { font-family: var(--font-cond); font-size: 1rem; font-weight: 600; color: var(--white); letter-spacing: 0.05em; text-transform: uppercase; line-height: 1.2; }
.header-title p { font-size: 0.72rem; color: rgba(255,255,255,0.38); font-weight: 300; margin-top: 0.1rem; }
.back-link { display: inline-flex; align-items: center; gap: 0.45rem; color: rgba(255,255,255,0.42); font-family: var(--font-cond); font-size: 0.7rem; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; text-decoration: none; transition: color 0.15s; flex-shrink: 0; }
.back-link:hover { color: var(--white); }
.back-link svg { width: 14px; height: 14px; }

/* ── HERO (subpáginas) ── */
.hero { background: linear-gradient(135deg, var(--black) 0%, #0a1e35 100%); border-bottom: 4px solid var(--blue); padding: 2.25rem 0; }
.hero-inner { max-width: 1200px; margin: 0 auto; padding: 0 2.5rem; display: flex; align-items: center; gap: 1.5rem; }
.hero-icon { width: 52px; height: 52px; background: var(--blue); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.hero-icon svg { width: 24px; height: 24px; color: white; }
.hero-text h2 { font-family: var(--font-cond); font-size: 1.45rem; font-weight: 700; color: var(--white); letter-spacing: 0.03em; text-transform: uppercase; }
.hero-text p { font-size: 0.87rem; color: rgba(255,255,255,0.45); margin-top: 0.2rem; font-weight: 300; }

/* ── MAIN ── */
main { max-width: 1200px; margin: 0 auto; padding: 2.75rem 2.5rem 7rem; }

/* ── TOC ── */
.toc { background: var(--white); border: 1px solid var(--border); border-top: 4px solid var(--blue); margin-bottom: 2.75rem; padding: 1.75rem 2rem; }
.toc-title { font-family: var(--font-cond); font-size: 0.68rem; font-weight: 700; letter-spacing: 0.18em; color: var(--grey); text-transform: uppercase; margin-bottom: 1.1rem; }
.toc-grid { display: grid; gap: 0.65rem; }
.toc-item { display: block; text-decoration: none; background: var(--off-white); border: 1px solid var(--border); border-left: 3px solid var(--grey-light); padding: 0.9rem 1.1rem; transition: all 0.15s; }
.toc-item:hover { border-left-color: var(--blue); background: var(--white); box-shadow: 0 2px 8px rgba(15,76,130,0.08); }
.toc-num { font-family: var(--font-cond); font-size: 0.65rem; font-weight: 700; letter-spacing: 0.14em; color: var(--blue); text-transform: uppercase; margin-bottom: 0.2rem; }
.toc-label { font-size: 0.85rem; font-weight: 600; color: var(--black); line-height: 1.3; }
.toc-sub { font-size: 0.73rem; color: var(--grey); margin-top: 0.15rem; font-weight: 300; }

/* ── EXERCISE CARD ── */
.exercise { background: var(--white); border: 1px solid var(--border); margin-bottom: 2rem; overflow: hidden; }
.exercise-header { background: var(--black); padding: 1.25rem 1.75rem; display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.ex-left { display: flex; align-items: center; gap: 1rem; }
.ex-num { background: var(--blue); color: var(--white); font-family: var(--font-cond); font-size: 1rem; font-weight: 700; width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.ex-title { font-family: var(--font-cond); font-size: 1.1rem; font-weight: 600; color: var(--white); letter-spacing: 0.04em; text-transform: uppercase; }
.ex-subtitle { font-size: 0.8rem; color: rgba(255,255,255,0.38); margin-top: 0.12rem; font-weight: 300; }
.tool-badge { background: rgba(255,255,255,0.07); border: 1px solid rgba(255,255,255,0.15); color: rgba(255,255,255,0.5); font-family: var(--font-cond); font-size: 0.65rem; font-weight: 500; letter-spacing: 0.12em; padding: 0.25rem 0.75rem; text-transform: uppercase; white-space: nowrap; flex-shrink: 0; }
.exercise-body { padding: 1.75rem; }

/* ── DOCS ── */
.docs-section { margin-bottom: 1.5rem; }
.docs-label { font-family: var(--font-cond); font-size: 0.66rem; font-weight: 700; letter-spacing: 0.16em; color: var(--grey); text-transform: uppercase; margin-bottom: 0.6rem; }
.docs-grid { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.doc-link { display: inline-flex; align-items: center; gap: 0.5rem; background: var(--off-white); border: 1px solid var(--border); border-left: 3px solid var(--grey); padding: 0.6rem 1rem; text-decoration: none; color: var(--black); font-size: 0.83rem; font-weight: 500; transition: all 0.15s; }
.doc-link:hover { background: var(--blue); color: var(--white); border-color: var(--blue); }
.doc-link svg { width: 13px; height: 13px; flex-shrink: 0; }
.doc-link.docx { border-left-color: #2b579a; }

/* ── PROMPT GROUP ── */
.prompt-group-label { font-family: var(--font-cond); font-size: 0.68rem; font-weight: 700; letter-spacing: 0.14em; color: var(--grey); text-transform: uppercase; margin-bottom: 0.6rem; margin-top: 1.5rem; padding-top: 1.4rem; border-top: 1px solid var(--border); display: flex; align-items: center; gap: 0.6rem; }
.prompt-group-label.first { margin-top: 0; padding-top: 0; border-top: none; }
.pg-num { background: var(--blue); color: white; font-family: var(--font-cond); font-size: 0.62rem; font-weight: 700; width: 20px; height: 20px; display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; }

/* ── PROMPT BOX ── */
.prompt-item { margin-bottom: 0.6rem; }
.prompt-item:last-child { margin-bottom: 0; }
.prompt-box { border: 1px solid var(--border); background: var(--off-white); overflow: hidden; }
.prompt-text { padding: 1.1rem 1.3rem; font-size: 0.88rem; color: var(--black); white-space: pre-wrap; line-height: 1.68; }
.prompt-footer { border-top: 1px solid var(--border); padding: 0.45rem 1rem; display: flex; justify-content: flex-end; background: var(--white); }

/* ── COPY BTN ── */
.copy-btn { display: inline-flex; align-items: center; gap: 0.4rem; background: none; border: 1px solid var(--border); color: var(--grey); font-family: var(--font-cond); font-size: 0.65rem; font-weight: 600; letter-spacing: 0.1em; padding: 0.28rem 0.75rem; cursor: pointer; transition: all 0.15s; text-transform: uppercase; }
.copy-btn:hover { background: var(--blue); border-color: var(--blue); color: white; }
.copy-btn.copied { background: var(--blue-dark); border-color: var(--blue-dark); color: white; }
.copy-btn svg { width: 11px; height: 11px; }

/* ── INFO NOTE ── */
.info-note { background: var(--blue-pale); border: 1px solid #b8d4ea; border-left: 3px solid var(--blue); padding: 0.85rem 1.1rem 0.85rem 2.75rem; font-size: 0.85rem; color: var(--black); margin-bottom: 1.4rem; display: block; line-height: 1.58; position: relative; }
.info-note svg { position: absolute; left: 0.95rem; top: 0.95rem; width: 14px; height: 14px; color: var(--blue); }

/* ── CONTEXT BLOCK ── */
.context-block { background: var(--white); border: 1px solid var(--border); border-left: 3px solid var(--blue); padding: 1.1rem 1.3rem; margin-bottom: 1.4rem; font-size: 0.86rem; color: #333; line-height: 1.7; }
.context-block strong { font-family: var(--font-cond); font-size: 0.66rem; font-weight: 700; letter-spacing: 0.14em; color: var(--blue); text-transform: uppercase; display: block; margin-bottom: 0.35rem; margin-top: 0.75rem; }
.context-block strong:first-child { margin-top: 0; }

/* ── INSTRUCTIONS BLOCK (instrucciones globales) ── */
.instructions-block { background: #f8fafc; border: 1px solid var(--border); padding: 1.5rem 1.75rem; margin-bottom: 1.5rem; font-size: 0.86rem; color: #222; line-height: 1.75; }
.instructions-block h3 { font-family: var(--font-cond); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.16em; color: var(--blue); text-transform: uppercase; margin-bottom: 0.6rem; margin-top: 1.25rem; padding-top: 1.1rem; border-top: 1px solid var(--border); }
.instructions-block h3:first-child { margin-top: 0; padding-top: 0; border-top: none; }
.instructions-block p { margin-bottom: 0.6rem; }
.instructions-block p:last-child { margin-bottom: 0; }
.instructions-block ul { padding-left: 1.2rem; margin-bottom: 0.6rem; }
.instructions-block li { margin-bottom: 0.25rem; }
.label-pill { display: inline-block; font-family: var(--font-cond); font-size: 0.62rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; padding: 0.15rem 0.55rem; margin-right: 0.4rem; }
.pill-hecho { background: #e8f0fb; color: #1a4a8a; }
.pill-patron { background: #e8f5ee; color: #1a6a3a; }
.pill-interp { background: #fef6e4; color: #7a5200; }
.pill-hip { background: #fce8e8; color: #8a1a1a; }
.pill-rec { background: #ede8f5; color: #4a1a8a; }

/* ── FOOTER ── */
footer { background: var(--black); border-top: 4px solid var(--blue); padding: 1.75rem 2.5rem; text-align: center; }
footer p { font-size: 0.72rem; color: rgba(255,255,255,0.26); font-family: var(--font-cond); letter-spacing: 0.08em; text-transform: uppercase; }

@media (max-width: 640px) {
  .header-inner { padding: 0 1.25rem; gap: 1rem; }
  main { padding: 1.5rem 1.25rem 5rem; }
  .hero-inner { padding: 0 1.25rem; }
  .exercise-header { padding: 1rem 1.25rem; }
  .exercise-body { padding: 1.25rem; }
  .tool-badge { display: none; }
  .toc { padding: 1.25rem; }
}