/* Piano Lab — landing + course (Pianistech brand) */
:root {
  --bg: #21191e;
  --card: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.12);
  --text: #fff;
  --muted: rgba(255, 255, 255, 0.78);
  --muted2: rgba(255, 255, 255, 0.62);
  --green: #8ccf10;
  --pink: #ff0089;
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.35);
  --radius: 20px;
  --max: 1140px;
  --font: "Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
  overflow-x: hidden;
}

.pl-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(1200px 700px at 15% -5%, rgba(255, 0, 137, 0.22), transparent 55%),
    radial-gradient(900px 600px at 95% 5%, rgba(140, 207, 16, 0.18), transparent 55%),
    var(--bg);
}

.pl-wrap { position: relative; z-index: 1; }

.pl-top {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(33, 25, 30, 0.82);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.pl-top-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.pl-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
  font-weight: 800;
  font-size: 15px;
}
.pl-brand img { height: 26px; width: auto; }
.pl-top-link {
  font-size: 14px;
  font-weight: 650;
  color: var(--muted);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 10px;
}
.pl-top-link:hover { background: rgba(255, 255, 255, 0.06); color: #fff; }

/* Hero */
.pl-hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(40px, 7vw, 72px) 20px clamp(32px, 5vw, 48px);
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(28px, 4vw, 48px);
  align-items: center;
}
@media (max-width: 900px) { .pl-hero { grid-template-columns: 1fr; } }

.pl-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.65);
  margin: 0 0 14px;
}
.pl-dot {
  width: 8px;
  height: 8px;
  border-radius: 99px;
  background: var(--green);
  box-shadow: 0 0 12px rgba(140, 207, 16, 0.55);
}

.pl-h1 {
  margin: 0 0 16px;
  font-size: clamp(36px, 5.5vw, 58px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -1.2px;
}
.pl-h1 .accent-green { color: var(--green); }
.pl-h1 .accent-pink { color: var(--pink); }

.pl-lead {
  margin: 0 0 20px;
  font-size: clamp(16px, 2vw, 19px);
  color: var(--muted);
  font-weight: 500;
  max-width: 52ch;
}

.pl-bullets {
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}
.pl-bullets li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.9);
}
.pl-bullets li::before {
  content: "✓";
  flex-shrink: 0;
  color: var(--green);
  font-weight: 800;
}

.pl-cta-primary {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  padding: 16px 22px;
  border-radius: 16px;
  text-decoration: none;
  font-weight: 800;
  border: 1px solid rgba(140, 207, 16, 0.45);
  background: rgba(140, 207, 16, 0.18);
  color: #fff;
  transition: background 0.2s, transform 0.2s;
  box-shadow: 0 12px 40px rgba(140, 207, 16, 0.12);
}
.pl-cta-primary:hover {
  background: rgba(140, 207, 16, 0.28);
  transform: translateY(-2px);
}
.pl-cta-main { font-size: 17px; }
.pl-cta-sub {
  font-size: 13px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.75);
}
.pl-cta-fine {
  margin: 12px 0 0;
  font-size: 13px;
  color: var(--muted2);
}

.pl-hero-visual {
  border-radius: calc(var(--radius) + 4px);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  background: rgba(0, 0, 0, 0.3);
}
.pl-hero-visual img,
.pl-hero-visual video {
  width: 100%;
  display: block;
  aspect-ratio: 16/10;
  object-fit: cover;
}
.pl-hero-caption {
  margin: 0;
  padding: 12px 16px;
  font-size: 13px;
  color: var(--muted2);
  border-top: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.2);
}

/* Stats strip */
.pl-stats {
  max-width: var(--max);
  margin: 0 auto 48px;
  padding: 0 20px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
@media (max-width: 720px) { .pl-stats { grid-template-columns: 1fr 1fr; } }
.pl-stat {
  text-align: center;
  padding: 18px 12px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--card);
}
.pl-stat-num {
  display: block;
  font-size: 28px;
  font-weight: 900;
  letter-spacing: -0.5px;
  color: var(--green);
}
.pl-stat-label { font-size: 13px; color: var(--muted2); font-weight: 600; }

/* Sections */
.pl-section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px 56px;
}
.pl-section-head {
  text-align: center;
  margin-bottom: 28px;
}
.pl-section-head h2 {
  margin: 0 0 8px;
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 900;
  letter-spacing: -0.5px;
}
.pl-section-head p {
  margin: 0 auto;
  max-width: 56ch;
  color: var(--muted);
  font-size: 16px;
}

.pl-not-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
@media (max-width: 640px) { .pl-not-grid { grid-template-columns: 1fr; } }
.pl-not-card {
  padding: 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--card);
}
.pl-not-card.yes { border-color: rgba(140, 207, 16, 0.28); }
.pl-not-card.no { border-color: rgba(255, 0, 137, 0.22); opacity: 0.92; }
.pl-not-card h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 800;
}
.pl-not-card ul {
  margin: 0;
  padding: 0 0 0 18px;
  font-size: 14px;
  color: var(--muted);
}

.pl-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
@media (max-width: 900px) { .pl-grid-3 { grid-template-columns: 1fr; } }
.pl-tile {
  padding: 22px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--card);
}
.pl-tile-icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 0, 137, 0.16);
  border: 1px solid rgba(255, 0, 137, 0.22);
  margin-bottom: 12px;
  font-size: 20px;
}
.pl-tile h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
}
.pl-tile p {
  margin: 0;
  font-size: 14px;
  color: var(--muted2);
}

/* Curriculum preview */
.pl-curriculum {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  overflow: hidden;
}
.pl-mod {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.pl-mod:last-child { border-bottom: 0; }
.pl-mod-head {
  padding: 16px 20px;
  font-weight: 800;
  font-size: 15px;
  background: rgba(0, 0, 0, 0.15);
  color: var(--green);
}
.pl-lesson-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  font-size: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  color: rgba(255, 255, 255, 0.88);
}
.pl-lesson-num {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 800;
  background: rgba(255, 255, 255, 0.08);
  color: var(--muted);
}

/* Pricing */
.pl-pricing {
  max-width: 560px;
  margin: 0 auto;
  padding: 28px 24px;
  border-radius: calc(var(--radius) + 4px);
  border: 1px solid rgba(140, 207, 16, 0.3);
  background: linear-gradient(180deg, rgba(140, 207, 16, 0.1), rgba(255, 255, 255, 0.04));
  box-shadow: var(--shadow);
  text-align: center;
}
.pl-price-tag {
  margin: 0 0 12px;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 10px;
}
.pl-price-num {
  font-size: 52px;
  font-weight: 900;
  letter-spacing: -2px;
}
.pl-price-once { font-size: 15px; color: var(--muted2); font-weight: 700; }
.pl-pricing p { color: var(--muted); font-size: 15px; margin: 0 0 16px; }
.pl-cta-primary-wide {
  width: 100%;
  align-items: center;
  text-align: center;
}
.pl-price-foot {
  margin: 14px 0 0;
  font-size: 12px;
  color: var(--muted2);
}

/* FAQ */
.pl-faq details {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--card);
  padding: 14px 16px;
  margin-bottom: 10px;
}
.pl-faq summary {
  cursor: pointer;
  font-weight: 800;
  font-size: 15px;
}
.pl-faq details p {
  margin: 10px 0 0;
  font-size: 14px;
  color: var(--muted);
}

.pl-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px 20px 48px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 14px;
  color: var(--muted2);
}
.pl-footer a { color: inherit; text-decoration: none; }
.pl-footer a:hover { text-decoration: underline; }

/* Landing i18n */
html[lang="es"] .pl-i18n-en { display: none !important; }
html[lang="en"] .pl-i18n-es { display: none !important; }
.pl-top-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.pl-lang-toggle {
  display: inline-flex;
  padding: 3px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(0, 0, 0, 0.22);
}
.pl-lang-toggle button {
  border: 0;
  background: transparent;
  color: rgba(255, 255, 255, 0.65);
  font: inherit;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.04em;
  padding: 7px 11px;
  border-radius: 999px;
  cursor: pointer;
}
.pl-lang-toggle button.is-active {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
}

/* ─── Course app ─── */
body.pl-course-body { background: var(--bg); min-height: 100vh; }

.pl-gate {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(11, 6, 14, 0.92);
  backdrop-filter: blur(8px);
}
.pl-gate[hidden] { display: none !important; }
.pl-gate-card {
  width: min(400px, 100%);
  padding: 28px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(33, 25, 30, 0.95);
  box-shadow: var(--shadow);
}
.pl-gate-card h2 { margin: 0 0 8px; font-size: 24px; font-weight: 900; }
.pl-gate-hint { margin: 0 0 18px; font-size: 14px; color: var(--muted2); }
.pl-field { display: block; margin-bottom: 12px; }
.pl-field span {
  display: block;
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--muted);
}
.pl-field input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.25);
  color: #fff;
  font: inherit;
  font-size: 15px;
}
.pl-gate-err {
  margin: 0 0 12px;
  font-size: 13px;
  color: #ff6b9d;
}
.pl-gate-btn {
  width: 100%;
  padding: 13px;
  border: 0;
  border-radius: 14px;
  font: inherit;
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
  background: rgba(140, 207, 16, 0.22);
  border: 1px solid rgba(140, 207, 16, 0.4);
  color: #fff;
}
.pl-gate-btn:hover { background: rgba(140, 207, 16, 0.32); }

.pl-course-shell {
  display: grid;
  grid-template-columns: 320px 1fr;
  min-height: calc(100vh - 56px);
  max-width: 1400px;
  margin: 0 auto;
}
@media (max-width: 900px) {
  .pl-course-shell { grid-template-columns: 1fr; }
  .pl-sidebar { max-height: 40vh; overflow-y: auto; border-right: 0; border-bottom: 1px solid var(--border); }
}
.pl-sidebar {
  border-right: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.18);
  overflow-y: auto;
  padding: 16px 0 24px;
}
.pl-sidebar-head {
  padding: 8px 18px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 8px;
}
.pl-sidebar-head h1 { margin: 0; font-size: 20px; font-weight: 900; }
.pl-sidebar-head p { margin: 4px 0 0; font-size: 13px; color: var(--muted2); }
.pl-ebook-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  padding: 9px 14px;
  border-radius: 12px;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  color: #fff;
  border: 1px solid rgba(255, 0, 137, 0.35);
  background: rgba(255, 0, 137, 0.14);
}
.pl-ebook-btn:hover { background: rgba(255, 0, 137, 0.22); }

.pl-mod-label {
  padding: 12px 18px 6px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--green);
}
.pl-lesson-btn {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  width: 100%;
  padding: 10px 18px;
  border: 0;
  background: transparent;
  color: rgba(255, 255, 255, 0.82);
  font: inherit;
  font-size: 13px;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s;
}
.pl-lesson-btn:hover { background: rgba(255, 255, 255, 0.06); }
.pl-lesson-btn.is-active {
  background: rgba(140, 207, 16, 0.12);
  color: #fff;
}
.pl-lesson-btn.is-done .pl-lesson-num { background: rgba(140, 207, 16, 0.25); color: var(--green); }

.pl-main { padding: 20px 24px 40px; overflow-y: auto; }
.pl-video-wrap {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #000;
  margin-bottom: 18px;
}
.pl-video-wrap video {
  width: 100%;
  display: block;
  max-height: min(56vh, 520px);
  background: #000;
}
.pl-lesson-title {
  margin: 0 0 8px;
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 900;
  letter-spacing: -0.4px;
}
.pl-lesson-desc {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 15px;
}
.pl-progression {
  display: inline-block;
  padding: 10px 14px;
  border-radius: 12px;
  font-family: ui-monospace, monospace;
  font-size: 14px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border);
  color: var(--green);
  margin-bottom: 16px;
}
.pl-mark-done {
  padding: 10px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}
.pl-mark-done:hover { background: rgba(255, 255, 255, 0.1); }

body.pl-shell-locked .pl-course-shell { filter: blur(6px); pointer-events: none; user-select: none; }

/* Thank you */
.pl-thanks {
  position: relative;
  z-index: 1;
  max-width: 520px;
  margin: 0 auto;
  padding: 48px 20px 60px;
}
.pl-thanks h1 { font-size: 32px; font-weight: 900; margin: 0 0 12px; }
.pl-thanks .card {
  padding: 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--card);
  margin-bottom: 16px;
}
.pl-thanks .app-link {
  font-weight: 800;
  font-size: 18px;
  color: var(--green);
  text-decoration: none;
}
.pl-thanks .app-link:hover { text-decoration: underline; }