:root {
  --ink: #10203a;
  --muted: #5d6b80;
  --paper: #f7f9fc;
  --white: #ffffff;
  --blue: #165dff;
  --blue-dark: #0d3c9e;
  --cyan: #34c9dc;
  --gold: #ffbc42;
  --coral: #ff6b5f;
  --violet: #7c4dff;
  --pink: #f44f9a;
  --green: #35c98b;
  --line: #dce5f1;
  --shadow: 0 16px 40px rgba(17, 43, 84, .11);
  --radius: 22px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 7% 8%, rgba(52, 201, 220, .24), transparent 25rem),
    radial-gradient(circle at 92% 12%, rgba(124, 77, 255, .18), transparent 29rem),
    radial-gradient(circle at 76% 58%, rgba(255, 188, 66, .14), transparent 25rem),
    radial-gradient(circle at 18% 78%, rgba(244, 79, 154, .11), transparent 24rem),
    var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.58;
}

a { color: inherit; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 8px;
  z-index: 50;
  padding: .7rem 1rem;
  background: var(--white);
  border-radius: 10px;
}

.skip-link:focus { left: 8px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid rgba(220, 229, 241, .88);
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(14px);
}

.nav-wrap {
  width: min(1180px, calc(100% - 2rem));
  min-height: 74px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .75rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 850;
  letter-spacing: -.025em;
}

.brand-mark {
  width: 43px;
  height: 43px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  color: var(--white);
  background: linear-gradient(145deg, var(--violet), var(--blue) 55%, var(--cyan));
  box-shadow: 0 8px 20px rgba(22, 93, 255, .24);
  font-size: 1.3rem;
}

.brand span:last-child { display: grid; line-height: 1.03; }
.brand small { color: var(--muted); font-size: .7rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }

.main-nav { display: flex; align-items: center; gap: .15rem; }
.main-nav a {
  padding: .6rem .72rem;
  border-radius: 10px;
  color: #34435a;
  text-decoration: none;
  font-size: .91rem;
  font-weight: 720;
}
.main-nav a:hover, .main-nav a[aria-current="page"] { color: #5430bf; background: linear-gradient(135deg, #eee9ff, #e6f8ff); }

.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--white);
  color: var(--ink);
  font-size: 1.3rem;
}

.page-shell { width: min(1180px, calc(100% - 2rem)); margin: 0 auto; }

.hero {
  position: relative;
  min-height: 520px;
  padding: 5.3rem 0 3.5rem;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr);
  align-items: center;
  gap: 4rem;
}

.hero::before,
.hero::after {
  position: absolute;
  z-index: -1;
  color: rgba(124, 77, 255, .1);
  font-weight: 900;
  line-height: 1;
  pointer-events: none;
}
.hero::before { content: "♫"; top: 2.2rem; left: -3rem; font-size: 8rem; transform: rotate(-12deg); }
.hero::after { content: "♪"; right: -2.5rem; bottom: 1rem; color: rgba(244, 79, 154, .09); font-size: 9rem; transform: rotate(14deg); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  margin: 0 0 1rem;
  color: var(--blue-dark);
  font-size: .82rem;
  font-weight: 850;
  letter-spacing: .09em;
  text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 32px; height: 3px; border-radius: 3px; background: var(--gold); }

h1, h2, h3 { margin-top: 0; line-height: 1.08; letter-spacing: -.035em; }
h1 {
  max-width: 760px;
  margin-bottom: 1.35rem;
  color: var(--blue-dark);
  background: linear-gradient(110deg, #143c99 5%, #5d3bd3 52%, #d53f88 98%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: clamp(2.65rem, 6vw, 5.15rem);
}
h2 { font-size: clamp(2rem, 4vw, 3.15rem); }
h3 { font-size: 1.35rem; }

.hero-copy > p:not(.eyebrow) { max-width: 680px; color: var(--muted); font-size: 1.16rem; }

.music-doodles { margin: 1.35rem 0 .2rem; display: flex; align-items: center; gap: .65rem; }
.music-doodles span {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  font-size: 1.25rem;
  box-shadow: 0 8px 18px rgba(44, 53, 106, .12);
  transform: rotate(-4deg);
}
.music-doodles span:nth-child(1) { color: #fff; background: var(--violet); }
.music-doodles span:nth-child(2) { background: #fff0b9; transform: rotate(5deg); }
.music-doodles span:nth-child(3) { color: #fff; background: var(--coral); }
.music-doodles span:nth-child(4) { background: #c9f6ff; transform: rotate(4deg); }
.music-doodles span:nth-child(5) { color: #fff; background: var(--green); }

.actions { margin-top: 2rem; display: flex; flex-wrap: wrap; gap: .8rem; }
.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55rem;
  padding: .76rem 1.1rem;
  border: 1px solid transparent;
  border-radius: 13px;
  background: linear-gradient(135deg, var(--violet), var(--blue));
  color: var(--white);
  text-decoration: none;
  font-weight: 800;
  box-shadow: 0 9px 22px rgba(22, 93, 255, .18);
}
.button:hover { background: linear-gradient(135deg, #6036de, var(--blue-dark)); transform: translateY(-1px); }
.button.secondary { color: var(--ink); background: var(--white); border-color: var(--line); box-shadow: none; }

.quick-panel {
  position: relative;
  padding: 1.4rem;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 30px;
  color: var(--white);
  background: linear-gradient(145deg, #5737ca, #165dff 48%, #089eb4 110%);
  box-shadow: var(--shadow);
}
.quick-panel::before {
  content: "";
  position: absolute;
  width: 240px;
  height: 240px;
  right: -95px;
  top: -105px;
  border-radius: 50%;
  background: rgba(255, 188, 66, .3);
}
.quick-panel::after {
  content: "♬";
  position: absolute;
  right: 1rem;
  bottom: -.5rem;
  color: rgba(255,255,255,.1);
  font-size: 7rem;
  line-height: 1;
  transform: rotate(-8deg);
  pointer-events: none;
}
.quick-panel h2 { position: relative; margin: .2rem .3rem 1.2rem; font-size: 1.2rem; letter-spacing: -.01em; }
.quick-grid { position: relative; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .7rem; }
.quick-link {
  min-height: 108px;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 17px;
  background: rgba(255,255,255,.13);
  color: var(--white);
  text-decoration: none;
  font-weight: 750;
}
.quick-link:hover { background: rgba(255,255,255,.14); transform: translateY(-2px); }
.quick-link .symbol { font-size: 1.55rem; }
.quick-link:nth-child(1) { background: rgba(255, 202, 74, .2); }
.quick-link:nth-child(2) { background: rgba(255, 109, 153, .2); }
.quick-link:nth-child(3) { background: rgba(60, 220, 188, .2); }
.quick-link:nth-child(4) { background: rgba(135, 214, 255, .2); }

.section { padding: 4.8rem 0; }
.section:nth-of-type(2) {
  border-block: 1px solid rgba(124, 77, 255, .09);
  background: linear-gradient(115deg, rgba(239, 235, 255, .65), rgba(231, 250, 255, .72) 50%, rgba(255, 244, 215, .55));
}
.section-head { max-width: 750px; margin-bottom: 2rem; }
.section-head p { color: var(--muted); font-size: 1.06rem; }

.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.15rem; }
.card {
  position: relative;
  overflow: hidden;
  padding: 1.45rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 8px 24px rgba(17, 43, 84, .055);
}
.card::before { content: ""; position: absolute; inset: 0 0 auto; height: 6px; background: var(--violet); }
.card:nth-child(2)::before { background: var(--coral); }
.card:nth-child(3)::before { background: var(--green); }
.card-icon {
  width: 52px;
  height: 52px;
  margin-bottom: 1rem;
  display: grid;
  place-items: center;
  border-radius: 17px;
  background: #eee9ff;
  font-size: 1.55rem;
}
.card:nth-child(2) .card-icon { background: #fff0e9; }
.card:nth-child(3) .card-icon { background: #ddf9ed; }
.card:hover { border-color: #b8c9e3; box-shadow: var(--shadow); transform: translateY(-3px); }
.card p { color: var(--muted); }
.card a { color: var(--blue-dark); font-weight: 800; text-decoration: none; }
.card .tag, .tag {
  display: inline-flex;
  margin-bottom: 1rem;
  padding: .27rem .62rem;
  border-radius: 999px;
  color: var(--blue-dark);
  background: #e9f0ff;
  font-size: .75rem;
  font-weight: 850;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.feature-strip {
  position: relative;
  overflow: hidden;
  padding: 2.2rem;
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 2rem;
  align-items: center;
  border-radius: 28px;
  color: var(--white);
  background: linear-gradient(110deg, #5129b9, var(--blue) 52%, #079caf);
  box-shadow: var(--shadow);
}
.feature-strip::after { content: "♫ ♪ ♬"; position: absolute; right: -1rem; top: -.6rem; color: rgba(255,255,255,.09); font-size: 4.8rem; font-weight: 900; letter-spacing: .4rem; transform: rotate(-7deg); pointer-events: none; }
.feature-strip > * { position: relative; z-index: 1; }
.feature-strip p { color: #dce8ff; }
.feature-list { display: grid; gap: .8rem; }
.feature-item { padding: .8rem 1rem; border-radius: 14px; background: rgba(255,255,255,.11); }

.page-hero {
  position: relative;
  margin-top: 2rem;
  padding: 2.5rem;
  overflow: hidden;
  border: 1px solid rgba(124, 77, 255, .12);
  border-radius: 28px;
  background: linear-gradient(120deg, rgba(255,255,255,.94), rgba(239,235,255,.84) 54%, rgba(225,249,255,.88));
  box-shadow: 0 15px 38px rgba(57, 44, 120, .08);
}
.page-hero::after { content: "♫"; position: absolute; right: 1.4rem; bottom: -2rem; color: rgba(124,77,255,.09); font-size: 9rem; font-weight: 900; transform: rotate(12deg); }
.page-hero > * { position: relative; z-index: 1; }
.page-hero p { max-width: 760px; color: var(--muted); font-size: 1.08rem; }
.page-symbol {
  position: absolute;
  right: 2.3rem;
  top: 1.6rem;
  width: 72px;
  height: 72px;
  display: grid;
  place-items: center;
  border-radius: 24px;
  background: rgba(255,255,255,.72);
  box-shadow: 0 12px 28px rgba(68, 51, 137, .12);
  font-size: 2rem;
  transform: rotate(5deg);
}

.resource-tools {
  margin: 1.7rem 0 1.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.resource-tools .search-box { width: min(650px, 100%); margin: 0; }
.resource-tools .search-box > span { display: grid; place-items: center; padding-left: .75rem; color: var(--violet); font-size: 1.5rem; font-weight: 900; }
.resource-summary { margin: 0; color: var(--muted); white-space: nowrap; }
.resource-summary strong { color: var(--violet); font-size: 1.15rem; }

.category-nav {
  margin: 1.35rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
}
.category-chip {
  padding: .65rem .9rem;
  border: 1px solid rgba(124,77,255,.16);
  border-radius: 999px;
  color: #5234ad;
  background: rgba(255,255,255,.86);
  text-decoration: none;
  font-size: .9rem;
  font-weight: 800;
  box-shadow: 0 6px 18px rgba(47, 40, 105, .07);
}
.category-chip:hover { color: #fff; background: linear-gradient(135deg, var(--violet), var(--blue)); transform: translateY(-1px); }

.resource-section { padding-top: 1.1rem; scroll-margin-top: 88px; }
.resource-section + .resource-section { padding-top: 3rem; }
.resource-section-head {
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: .75rem;
}
.resource-section-head > span {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  background: linear-gradient(135deg, #eee9ff, #e2f9ff);
  font-size: 1.35rem;
}
.resource-section-head h2 { margin: 0; font-size: clamp(1.65rem, 4vw, 2.25rem); }
.resource-section-head small { margin-left: auto; color: var(--muted); font-weight: 700; }

.search-box {
  margin: 1.8rem 0 2.2rem;
  padding: .5rem;
  display: flex;
  gap: .5rem;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: var(--white);
  box-shadow: 0 8px 24px rgba(17, 43, 84, .055);
}
.search-box input {
  width: 100%;
  min-height: 46px;
  padding: 0 .9rem;
  border: 0;
  outline: 0;
  color: var(--ink);
  background: transparent;
  font: inherit;
}

.course-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; padding-bottom: 5rem; }
.course-card {
  min-height: 180px;
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--line);
  border-radius: 21px;
  background: var(--white);
  text-decoration: none;
}
.course-card:nth-child(6n+1) { border-top: 5px solid var(--violet); background: linear-gradient(145deg, #fff, #f2efff); }
.course-card:nth-child(6n+2) { border-top: 5px solid var(--cyan); background: linear-gradient(145deg, #fff, #e9fbff); }
.course-card:nth-child(6n+3) { border-top: 5px solid var(--gold); background: linear-gradient(145deg, #fff, #fff8e5); }
.course-card:nth-child(6n+4) { border-top: 5px solid var(--coral); background: linear-gradient(145deg, #fff, #fff0ec); }
.course-card:nth-child(6n+5) { border-top: 5px solid var(--green); background: linear-gradient(145deg, #fff, #eafaf4); }
.course-card:nth-child(6n+6) { border-top: 5px solid var(--pink); background: linear-gradient(145deg, #fff, #fff0f7); }
.course-card:hover { border-color: var(--blue); transform: translateY(-3px); box-shadow: var(--shadow); }
.course-card strong { font-size: 1.32rem; }
.course-card span:last-child { color: var(--blue); font-weight: 800; }

.resource-list { display: grid; gap: .7rem; padding-bottom: 5rem; }
.resource-row {
  padding: 1rem 1.1rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--white);
}
.resource-row:hover { border-color: #b8c9e3; box-shadow: 0 10px 28px rgba(17,43,84,.08); transform: translateY(-1px); }
.resource-row:nth-child(4n+1) { border-left: 5px solid var(--violet); }
.resource-row:nth-child(4n+2) { border-left: 5px solid var(--cyan); }
.resource-row:nth-child(4n+3) { border-left: 5px solid var(--gold); }
.resource-row:nth-child(4n+4) { border-left: 5px solid var(--coral); }
.resource-row[hidden] { display: none; }
.resource-row strong { display: block; margin-bottom: .15rem; }
.resource-row small { color: var(--muted); font-size: .83rem; }
.resource-copy { min-width: 0; }
.difficulty {
  display: inline-flex;
  margin-top: .48rem;
  padding: .2rem .5rem;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 850;
}
.difficulty-facil { color: #12663f; background: #daf7e9; }
.difficulty-medio { color: #7c5500; background: #fff0bf; }
.difficulty-avanzado { color: #954519; background: #ffe2d2; }
.difficulty-dificil { color: #a01d3e; background: #ffdce6; }
.download-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .42rem; }
.download-links a {
  padding: .42rem .66rem;
  border-radius: 9px;
  color: var(--blue-dark);
  background: #e9f0ff;
  text-decoration: none;
  font-size: .82rem;
  font-weight: 850;
}
.download-links .kind-pdf { color: #a2223c; background: #ffe6eb; }
.download-links .kind-mscz { color: #4d2ca6; background: #eee7ff; }
.download-links .kind-video { color: #a42b24; background: #ffe4df; }
.download-links .kind-rar, .download-links .kind-zip { color: #8a5800; background: #fff0bf; }
.download-links .kind-doc, .download-links .kind-docx, .download-links .kind-odt { color: #125a9d; background: #e0f1ff; }
.download-links .kind-mp3, .download-links .kind-mid, .download-links .kind-midi { color: #087060; background: #dff8f1; }

.sitemap-grid { padding-top: 1.6rem; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; padding-bottom: 5rem; }
.info-panel { padding: 1.5rem; border: 1px solid var(--line); border-top: 5px solid var(--violet); border-radius: 22px; background: linear-gradient(145deg, var(--white), #f4f1ff); }
.info-panel:nth-child(2) { border-top-color: var(--cyan); background: linear-gradient(145deg, var(--white), #eafcff); }
.info-panel ul { padding-left: 1.2rem; }
.info-panel li + li { margin-top: .55rem; }

.site-footer { margin-top: 2rem; color: #dce5fa; background: linear-gradient(120deg, #25125f, #123e88 55%, #075d6a); }
.footer-wrap { width: min(1180px, calc(100% - 2rem)); margin: 0 auto; padding: 2.2rem 0; display: flex; justify-content: space-between; gap: 1.5rem; }
.footer-wrap strong { color: var(--white); }

@media (prefers-reduced-motion: no-preference) {
  .card, .course-card, .quick-link, .resource-row, .category-chip, .button { transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease, background .18s ease; }
}

@media (max-width: 900px) {
  .menu-button { display: grid; place-items: center; }
  .main-nav {
    position: absolute;
    left: 1rem;
    right: 1rem;
    top: 68px;
    padding: .7rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    border: 1px solid var(--line);
    border-radius: 17px;
    background: var(--white);
    box-shadow: var(--shadow);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: .76rem .8rem; }
  .hero { min-height: auto; padding-top: 3.5rem; grid-template-columns: 1fr; gap: 2.2rem; }
  .card-grid, .course-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .page-shell, .nav-wrap, .footer-wrap { width: min(100% - 1.15rem, 1180px); }
  .brand { font-size: .92rem; }
  .brand-mark { width: 39px; height: 39px; }
  h1 { font-size: clamp(2.45rem, 13vw, 3.75rem); }
  h2 { font-size: 2rem; }
  .hero { padding-top: 2.8rem; }
  .hero::before { left: -1.4rem; font-size: 5rem; }
  .hero::after { right: -.7rem; font-size: 5.5rem; }
  .music-doodles span { width: 37px; height: 37px; border-radius: 12px; font-size: 1.05rem; }
  .quick-panel { border-radius: 22px; padding: 1rem; }
  .quick-grid { grid-template-columns: 1fr 1fr; }
  .quick-link { min-height: 94px; padding: .8rem; font-size: .9rem; }
  .section { padding: 3.2rem 0; }
  .page-hero { margin-top: 1rem; padding: 1.5rem 1.2rem; border-radius: 22px; }
  .card-grid, .course-grid, .feature-strip, .two-col { grid-template-columns: 1fr; }
  .feature-strip { padding: 1.35rem; }
  .resource-row { grid-template-columns: 1fr; }
  .resource-tools { align-items: stretch; flex-direction: column; }
  .resource-summary { padding-left: .2rem; }
  .resource-section-head { flex-wrap: wrap; }
  .resource-section-head small { width: 100%; margin-left: 3.75rem; }
  .page-symbol { right: 1rem; top: 1rem; width: 52px; height: 52px; border-radius: 17px; font-size: 1.35rem; opacity: .75; }
  .download-links { justify-content: flex-start; }
  .footer-wrap { flex-direction: column; }
}