/* =============================================
   index.css — additions on top of the styles in index.php
   (linked AFTER the <style> block so these win ties)
============================================= */

/* ---------- Scroll progress bar ---------- */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 100%;
  transform-origin: left;
  transform: scaleX(0);
  background: linear-gradient(90deg, #6c63ff, #a78bfa, #6c63ff);
  z-index: 2000;
  pointer-events: none;
}

/* ---------- Navbar: shrink on scroll + active link ---------- */
.navbar { transition: padding .3s ease, box-shadow .3s ease; }
.navbar.is-scrolled {
  padding: 10px 28px;
  box-shadow: 0 10px 30px rgba(108, 99, 255, 0.18);
}
.navbar.is-scrolled::before { background-color: rgba(255, 255, 255, 0.88); }
.nav-menu .nav-link { position: relative; }
.nav-menu .nav-link::after {
  content: '';
  position: absolute;
  left: 12px; right: 12px; bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s ease;
}
.nav-menu .nav-link:hover::after,
.nav-menu .nav-link.is-active::after { transform: scaleX(1); }
.nav-menu .nav-link.is-active { color: var(--primary); }

.logo-link:hover .logo-mark { transform: rotate(-8deg) scale(1.08); }
.logo-mark { transition: transform .35s cubic-bezier(.34, 1.56, .64, 1); }

/* ---------- Hero: floating teaching chips ---------- */
.hero-chips { position: absolute; inset: 0; pointer-events: none; z-index: 1; }

.hero-chip {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: rgba(255, 255, 255, .85);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: 0 10px 24px rgba(108, 99, 255, .16);
  font-size: 13px;
  font-weight: 500;
  color: var(--dark);
  opacity: 0;
}
.hero-chip i {
  display: grid;
  place-items: center;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
}
.hero-chip { animation: chipIn .8s ease forwards, chipBob 6s ease-in-out infinite; animation-delay: var(--delay, 0s), calc(var(--delay, 0s) + .8s); }
@keyframes chipIn  { from { opacity: 0; transform: translateY(20px) scale(.9); } to { opacity: 1; transform: none; } }
@keyframes chipBob { 0%, 100% { transform: translateY(0) rotate(var(--rot, 0deg)); } 50% { transform: translateY(-10px) rotate(var(--rot, 0deg)); } }

/* Hero headline: soft shimmer on the accent text */
.hero h1 em {
  background: linear-gradient(100deg, #6c63ff 20%, #a78bfa 45%, #6c63ff 70%);
  background-size: 220% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmerText 5s linear infinite;
}
@keyframes shimmerText { to { background-position: -220% 0; } }

/* ---------- Cursor spotlight on cards ---------- */
.feature-card::after,
.step-card::after,
.value-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(260px circle at var(--mx, 50%) var(--my, 50%), rgba(108, 99, 255, .14), transparent 70%);
  opacity: 0;
  transition: opacity .3s ease;
  pointer-events: none;
}
.feature-card:hover::after,
.step-card:hover::after,
.value-card:hover::after { opacity: 1; }
.value-card { position: relative; overflow: hidden; }

/* Icons react on hover */
.feature-icon { transition: background .3s ease, transform .4s cubic-bezier(.34, 1.56, .64, 1); }
.feature-card:hover .feature-icon { background: var(--primary); transform: rotate(-6deg) scale(1.1); }
.feature-card:hover .feature-icon svg { stroke: #fff; }
.feature-icon svg { transition: stroke .3s ease; }

.step-icon-area svg { transition: transform .5s cubic-bezier(.34, 1.56, .64, 1); }
.step-card:hover .step-icon-area svg { transform: scale(1.25) translateY(-3px); }

.value-card svg { transition: transform .4s cubic-bezier(.34, 1.56, .64, 1); }

/* ---------- Button ripple ---------- */
.ripple {
  position: absolute;
  border-radius: 50%;
  width: 10px; height: 10px;
  background: rgba(255, 255, 255, .55);
  transform: translate(-50%, -50%) scale(0);
  animation: rippleOut .6s ease-out forwards;
  pointer-events: none;
}
@keyframes rippleOut { to { transform: translate(-50%, -50%) scale(28); opacity: 0; } }
.btn-secondary, .btn-secondary-dark, .submit-btn { position: relative; overflow: hidden; }
.btn-secondary .ripple { background: rgba(108, 99, 255, .25); }

.btn-primary svg { transition: transform .25s ease; }
.btn-primary:hover svg { transform: translateX(5px); }

/* ---------- Contact form: floating focus feel ---------- */
.form-field { position: relative; }
.form-field::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  height: 2px; width: 100%;
  background: linear-gradient(90deg, #6c63ff, #a78bfa);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s ease;
}
.form-field:focus-within::after { transform: scaleX(1); }
.form-field:focus-within label { color: var(--primary); }
.form-field label { transition: color .2s ease; }
.form-field.has-error input,
.form-field.has-error textarea { border-bottom-color: var(--error); }
.form-field.has-error::after { background: var(--error); transform: scaleX(1); }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  left: 50%; bottom: 28px;
  transform: translate(-50%, 30px);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  background: var(--dark);
  color: #fff;
  font-size: 14px;
  border-radius: 999px;
  box-shadow: var(--shadow-xl);
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s ease, transform .4s cubic-bezier(.34, 1.56, .64, 1);
  z-index: 3000;
}
.toast i { color: #34d399; }
.toast.is-error i { color: #f87171; }
.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }

/* ---------- Back to top ---------- */
.to-top {
  position: fixed;
  right: 24px; bottom: 24px;
  width: 46px; height: 46px;
  display: grid;
  place-items: center;
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(108, 99, 255, .4);
  opacity: 0;
  transform: translateY(20px) scale(.8);
  pointer-events: none;
  transition: opacity .3s ease, transform .35s cubic-bezier(.34, 1.56, .64, 1);
  z-index: 1500;
}
.to-top.is-visible { opacity: 1; transform: none; pointer-events: auto; }
.to-top:hover { transform: translateY(-4px); }

/* =============================================
   FOOTER
============================================= */
.footer-logo { gap: 12px; }
.footer-logo .logo-mark {
  width: 38px; height: 38px;
  margin-right: 0;
  border-radius: 10px;
  background: linear-gradient(100deg, #6c63ff, #a78bfa);
  display: flex;
  align-items: center;
  justify-content: center;
}
.footer-logo .logo-mark i { color: #fff; font-size: 18px; }
.footer-logo:hover .logo-mark { transform: rotate(-8deg) scale(1.08); }

.footer-links-col a { position: relative; width: fit-content; }
.footer-links-col a:hover { transform: translateX(4px); }
.footer-links-col a { transition: color .2s ease, transform .25s ease; }

.legal-link { cursor: pointer; }

/* =============================================
   LEGAL MODAL
============================================= */
html.modal-open { overflow: hidden; }

.legal-modal {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  z-index: 4000;
  visibility: hidden;
  opacity: 0;
  transition: opacity .3s ease, visibility 0s linear .3s;
}
.legal-modal.is-open { visibility: visible; opacity: 1; transition: opacity .3s ease; }

.legal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(26, 26, 46, .6);
  backdrop-filter: blur(6px);
}

.legal-dialog {
  position: relative;
  width: 100%;
  max-width: 680px;
  max-height: 86vh;
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 30px 60px rgba(26, 26, 46, .35);
  overflow: hidden;
  transform: translateY(24px) scale(.96);
  transition: transform .4s cubic-bezier(.34, 1.56, .64, 1);
}
.legal-modal.is-open .legal-dialog { transform: none; }

.legal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 28px 0;
}
.legal-head h2 {
  font-family: 'Playfair Display', serif;
  font-size: 26px;
  color: var(--dark);
}
.legal-close {
  flex-shrink: 0;
  width: 38px; height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--off-white);
  color: var(--dark);
  cursor: pointer;
  transition: background .2s ease, color .2s ease, transform .3s ease;
}
.legal-close:hover { background: var(--primary); color: #fff; transform: rotate(90deg); }

.legal-tabs { display: flex; gap: 6px; padding: 16px 28px 0; border-bottom: 1px solid var(--border); }
.legal-tab {
  position: relative;
  padding: 10px 14px;
  border: none;
  background: none;
  font-size: 14px;
  font-weight: 500;
  color: var(--mid);
  cursor: pointer;
  transition: color .2s ease;
}
.legal-tab::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  background: var(--primary);
  transform: scaleX(0);
  transition: transform .3s ease;
}
.legal-tab:hover { color: var(--primary); }
.legal-tab[aria-selected="true"] { color: var(--primary); }
.legal-tab[aria-selected="true"]::after { transform: scaleX(1); }

.legal-body { padding: 24px 28px 8px; overflow-y: auto; color: var(--gray-700); font-size: 14px; line-height: 1.75; }
.legal-body .legal-updated { color: var(--mid); font-size: 12px; margin-bottom: 18px; }
.legal-body h3 {
  font-family: 'Playfair Display', serif;
  font-size: 17px;
  color: var(--dark);
  margin: 20px 0 6px;
}
.legal-body h3:first-of-type { margin-top: 0; }
.legal-body.is-swapping { animation: legalSwap .35s ease; }
@keyframes legalSwap { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.legal-foot { display: flex; justify-content: flex-end; padding: 16px 28px 24px; }

@media (max-width: 560px) {
  .legal-modal { padding: 12px; }
  .legal-head, .legal-tabs, .legal-body, .legal-foot { padding-left: 18px; padding-right: 18px; }
  .legal-tab { padding: 10px 8px; font-size: 13px; }
}
@media (max-width: 1100px) { .hero-chips { display: none; } }

@media (prefers-reduced-motion: reduce) {
  .hero-chip, .hero h1 em { animation: none !important; opacity: 1; }
  .legal-dialog, .toast, .to-top { transition-duration: .01ms !important; }
}


/* =====================================================================
   ROUND 2 — scroll animations, hero entrance, demo, marquee, effects
===================================================================== */

::selection { background: rgba(108, 99, 255, .25); }
html { scrollbar-color: #a78bfa #f0effe; scrollbar-width: thin; }

/* ---------- Hero: one orchestrated entrance ---------- */
.hero { overflow: hidden; }
.hero-bg { inset: -12% 0; will-change: transform; }
.hero .section-tag, .hero h1, .hero-description, .hero-cta {
  animation: heroUp .9s cubic-bezier(.2, .7, .2, 1) both;
}
.hero .section-tag { animation-delay: .05s; }
.hero h1 { animation-delay: .2s; }
.hero-description { animation-delay: .4s; }
.hero-cta { animation-delay: .55s; }
@keyframes heroUp { from { opacity: 0; transform: translateY(28px); } to { opacity: 1; transform: none; } }

/* hand-drawn underline under the accent words */
.hero h1 em { position: relative; display: inline-block; }
.em-underline { position: absolute; left: 0; bottom: -8px; width: 100%; height: 14px; overflow: visible; }
.em-underline path {
  fill: none; stroke: #a78bfa; stroke-width: 4; stroke-linecap: round;
  stroke-dasharray: 400; stroke-dashoffset: 400;
  animation: drawLine 1.1s ease 1.1s forwards;
}
@keyframes drawLine { to { stroke-dashoffset: 0; } }

/* faint school doodles that drift at different speeds while scrolling */
.hero-doodles { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.doodle { position: absolute; color: var(--primary); opacity: .13; will-change: transform; }

/* ---------- Marquee: what ClassInstruct can read ---------- */
.marquee {
  display: flex; align-items: center; gap: 24px;
  background: #fff; border-bottom: 1px solid var(--border); padding: 18px 0;
}
.marquee-label {
  flex-shrink: 0; padding-left: 64px;
  font-family: 'JetBrains Mono', monospace; font-size: 12px; font-weight: 500;
  letter-spacing: 1.8px; text-transform: uppercase; color: var(--primary);
}
.marquee-viewport {
  flex: 1; overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee-track { display: flex; width: max-content; animation: marquee 32s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-item { display: flex; align-items: center; gap: 10px; margin-right: 44px; font-size: 14px; color: var(--gray-700); white-space: nowrap; }
.marquee-item i { color: var(--primary); }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0; transform: translateY(32px);
  transition: opacity .8s cubic-bezier(.2, .7, .2, 1) var(--d, 0s), transform .8s cubic-bezier(.2, .7, .2, 1) var(--d, 0s);
}
.reveal.from-left { transform: translateX(-44px); }
.reveal.from-right { transform: translateX(44px); }
.reveal.is-in { opacity: 1; transform: none; }
.section-tag.reveal .line { transform: scaleX(0); transform-origin: left; transition: transform .9s ease .3s; }
.section-tag.reveal.is-in .line { transform: scaleX(1); }

/* ---------- How it works: connectors between steps ---------- */
.steps-grid { position: relative; }
.step-link {
  position: absolute; top: 39px; width: 32px; height: 32px;
  display: grid; place-items: center; border-radius: 50%;
  background: var(--primary); color: #fff; font-size: 12px;
  transform: translateX(-50%); z-index: 3;
  animation: ping 2.4s ease-out infinite;
}
@keyframes ping { 0% { box-shadow: 0 0 0 0 rgba(108, 99, 255, .5); } 70%, 100% { box-shadow: 0 0 0 14px rgba(108, 99, 255, 0); } }

.step-icon-area svg { scale: 1; transition: scale .4s cubic-bezier(.34, 1.56, .64, 1); }
.step-card:hover .step-icon-area svg { scale: 1.2; }
.step-card:nth-child(1) .step-icon-area svg { animation: bobY 2.2s ease-in-out infinite; }
.step-card:nth-child(2) .step-icon-area svg { animation: pulseS 2.4s ease-in-out infinite; }
.step-card:nth-child(3) .step-icon-area svg { animation: flyD 2.6s ease-in-out infinite; }
@keyframes bobY { 0%, 100% { transform: translateY(4px); } 50% { transform: translateY(-6px); } }
@keyframes pulseS { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.18); } }
@keyframes flyD { 0%, 100% { transform: translate(-3px, 3px); } 50% { transform: translate(4px, -4px); } }

/* ---------- Interactive demo ---------- */
.demo { padding: 128px 64px 144px; border-bottom: 1px solid var(--border); }
.demo h2 { font-family: 'Playfair Display', serif; font-size: 40px; line-height: 1.2; letter-spacing: -.4px; color: var(--dark); margin-bottom: 16px; }
.demo h2 em { font-style: italic; color: var(--primary); }
.demo-sub { max-width: 540px; color: var(--mid); font-size: 16px; line-height: 1.75; margin-bottom: 36px; }
.demo-chips { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.demo-chip {
  display: flex; align-items: center; gap: 8px; padding: 10px 18px;
  border: 1px solid var(--border); border-radius: 999px; background: #fff;
  font-size: 14px; font-weight: 500; color: var(--gray-700); cursor: pointer;
  transition: all .25s cubic-bezier(.34, 1.56, .64, 1);
}
.demo-chip:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-3px); }
.demo-chip[aria-pressed="true"] { background: var(--primary); border-color: var(--primary); color: #fff; box-shadow: 0 8px 18px rgba(108, 99, 255, .35); }

.demo-card {
  display: grid; grid-template-columns: 1.1fr .9fr;
  background: #fff; border: 1px solid var(--border); border-radius: 12px;
  box-shadow: var(--shadow-lg); overflow: hidden;
}
.demo-col { padding: 36px; }
.demo-col + .demo-col { background: var(--surface); border-left: 1px solid var(--border); }
.demo-label {
  font-family: 'JetBrains Mono', monospace; font-size: 12px; font-weight: 500;
  letter-spacing: 1.8px; text-transform: uppercase; color: var(--primary); margin-bottom: 12px;
}
.demo-topic { font-family: 'Playfair Display', serif; font-size: 26px; line-height: 1.25; color: var(--dark); margin-bottom: 20px; min-height: 66px; }
.demo-topic.is-loading::after { content: ' …'; animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.demo-obj { list-style: none; display: grid; gap: 12px; margin-bottom: 28px; }
.demo-obj li {
  display: flex; gap: 12px; font-size: 14px; line-height: 1.6; color: var(--gray-700);
  opacity: 0; animation: objIn .5s ease forwards; animation-delay: calc(var(--i) * .18s);
}
.demo-obj li i { color: var(--success); margin-top: 4px; }
@keyframes objIn { from { opacity: 0; transform: translateX(-14px); } to { opacity: 1; transform: none; } }
.demo-q { font-size: 15px; font-weight: 600; color: var(--dark); margin-bottom: 12px; }
.demo-opts { display: grid; gap: 10px; }
.demo-opt {
  text-align: left; padding: 12px 16px; border: 1px solid var(--border); border-radius: 8px;
  background: #fff; font-size: 14px; color: var(--dark); cursor: pointer; transition: all .2s ease;
}
.demo-opt:hover { border-color: var(--primary); transform: translateX(4px); }
.demo-opt.is-right { background: rgba(16, 185, 129, .12); border-color: var(--success); color: #065f46; }
.demo-opt.is-wrong { background: rgba(239, 68, 68, .08); border-color: var(--error); animation: shake .4s; }
@keyframes shake { 20%, 60% { transform: translateX(-6px); } 40%, 80% { transform: translateX(6px); } }
.demo-feedback { min-height: 22px; margin-top: 12px; font-size: 13px; color: var(--mid); }
.mastery-row { margin-bottom: 22px; }
.mastery-top { display: flex; justify-content: space-between; margin-bottom: 8px; font-size: 13px; font-weight: 500; color: var(--dark); }
.mastery-track { height: 10px; background: #fff; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; }
.mastery-fill { width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, #6c63ff, #a78bfa); transition: width 1.1s cubic-bezier(.2, .7, .2, 1); }
.demo-note { margin-top: 8px; font-size: 12px; color: var(--mid); }
@media (max-width: 900px) {
  .demo { padding: 96px 24px; }
  .demo-card { grid-template-columns: 1fr; }
  .demo-col + .demo-col { border-left: 0; border-top: 1px solid var(--border); }
}

/* ---------- Gold-star burst ---------- */
.star-burst {
  position: fixed; z-index: 5000; pointer-events: none; color: #fbbf24; font-size: var(--sz, 16px);
  animation: burst .9s cubic-bezier(.1, .8, .3, 1) forwards;
}
@keyframes burst {
  from { transform: translate(-50%, -50%) scale(.4); opacity: 1; }
  to { transform: translate(calc(-50% + var(--dx)), calc(-50% + var(--dy))) scale(1) rotate(180deg); opacity: 0; }
}

/* ---------- CTA: drifting colour orbs ---------- */
.cta-section { position: relative; overflow: hidden; }
.cta-section > * { position: relative; z-index: 1; }
.cta-section::before, .cta-section::after {
  content: ''; position: absolute; border-radius: 50%; filter: blur(70px); opacity: .35;
  animation: orbDrift 14s ease-in-out infinite alternate;
}
.cta-section::before { width: 380px; height: 380px; background: #6c63ff; top: -120px; left: -80px; }
.cta-section::after { width: 320px; height: 320px; background: #a78bfa; bottom: -120px; right: -60px; animation-delay: -6s; }
@keyframes orbDrift { to { transform: translate(80px, 50px) scale(1.15); } }

@media (max-width: 900px) { .step-link { display: none; } .marquee-label { display: none; } }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
  .em-underline path { stroke-dashoffset: 0; }
  .marquee-track, .step-link, .cta-section::before, .cta-section::after,
  .step-icon-area svg { animation: none !important; }
}

/* ---------- Legal pop-up: lists and links ---------- */
.legal-body p { margin-bottom: 10px; }
.legal-body ul { list-style: none; display: grid; gap: 6px; margin: 4px 0 12px; }
.legal-body li { position: relative; padding-left: 22px; }
.legal-body li::before {
  content: ''; position: absolute; left: 4px; top: .7em;
  width: 7px; height: 7px; border-radius: 50%; background: var(--primary);
}
.legal-body a { color: var(--primary); font-weight: 500; text-decoration: underline; text-underline-offset: 3px; }
.legal-body .legal-updated { font-weight: 500; }
/* =====================================================================
   Skip link (keyboard / screen-reader users)
===================================================================== */
.skip-link {
  position: fixed; top: 8px; left: 8px; z-index: 6000;
  padding: 10px 16px; border-radius: 10px;
  background: var(--dark); color: #fff; font-size: 14px; font-weight: 500;
  transform: translateY(-160%); transition: transform .2s ease;
}
.skip-link:focus { transform: none; outline: 2px solid var(--primary); outline-offset: 2px; }

/* Anchor jumps should not hide a section heading under the floating navbar */
section[id] { scroll-margin-top: 32px; }

/* =====================================================================
   Navbar: mobile menu
   Desktop shows the link row. At <= 900px the links collapse into a
   floating glass panel that drops down from the navbar pill, with a
   dimmed backdrop behind it. scripts.js toggles `.active` on the button
   and on #navMenu, and `.mobile-menu-open` on <body>.
===================================================================== */
.nav-backdrop { display: none; }

@media (max-width: 900px) {
  .navbar { padding: 10px 10px 10px 16px; }
  .navbar.is-scrolled { padding: 8px 10px 8px 16px; }

  .nav-desktop-cta { display: none; }

  /* ---- Hamburger button: 44px round tap target ---- */
  .nav-toggle {
    display: block;
    position: relative;
    flex-shrink: 0;
    width: 44px; height: 44px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: var(--primary-light);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    transition: background-color .2s ease, transform .2s ease;
  }
  .nav-toggle:hover { background: rgba(108, 99, 255, .18); }
  .nav-toggle:active { transform: scale(.94); }
  .nav-toggle:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
  .nav-toggle span {
    position: absolute; left: 50%; top: 50%;
    width: 20px; height: 2px; margin: -1px 0 0 -10px;
    border-radius: 2px;
    background: var(--dark);
    transition: transform .28s cubic-bezier(.2, .7, .2, 1), opacity .2s ease;
  }
  .nav-toggle span:nth-child(1) { transform: translateY(-6px); }
  .nav-toggle span:nth-child(3) { transform: translateY(6px); }
  .nav-toggle.active { background: var(--primary); }
  .nav-toggle.active span { background: #fff; }
  .nav-toggle.active span:nth-child(1) { transform: rotate(45deg); }
  .nav-toggle.active span:nth-child(2) { opacity: 0; transform: scaleX(.2); }
  .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg); }

  /* ---- Dimmed page behind the open menu ---- */
  .nav-backdrop {
    display: block;
    position: fixed; inset: 0; z-index: 999;
    background: rgba(15, 15, 35, .38);
    -webkit-backdrop-filter: blur(3px);
    backdrop-filter: blur(3px);
    opacity: 0; visibility: hidden;
    transition: opacity .25s ease, visibility 0s linear .25s;
  }
  body.mobile-menu-open { overflow: hidden; }
  body.mobile-menu-open .nav-backdrop { opacity: 1; visibility: visible; transition-delay: 0s; }
  body.mobile-menu-open .to-top { opacity: 0; pointer-events: none; }

  /* ---- The panel ---- */
  .nav-menu {
    position: absolute;
    top: calc(100% + 10px); left: 0; right: 0;
    width: auto; height: auto;
    max-height: calc(100vh - 120px);
    max-height: calc(100dvh - 120px);
    overflow-y: auto;
    display: flex; flex-direction: column; align-items: stretch;
    gap: 4px; padding: 12px;
    background: rgba(255, 255, 255, .96);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border);
    border-radius: 24px;
    box-shadow: 0 28px 56px -16px rgba(26, 26, 46, .35);
    transform-origin: top right;
    /* closed */
    opacity: 0; visibility: hidden; pointer-events: none;
    transform: translateY(-10px) scale(.97);
    transition: opacity .22s ease, transform .22s ease, visibility 0s linear .22s;
  }
  .nav-menu.active {
    opacity: 1; visibility: visible; pointer-events: auto;
    transform: none;
    transition: opacity .22s ease, transform .22s ease, visibility 0s;
  }

  /* ---- Links as comfortable full-width rows ---- */
  .nav-menu .nav-link {
    display: flex; align-items: center; justify-content: space-between;
    min-height: 52px; padding: 14px 16px;
    border-radius: 14px;
    font-size: 16px; font-weight: 500; color: var(--dark);
    -webkit-tap-highlight-color: transparent;
    transition: background-color .2s ease, color .2s ease;
  }
  .nav-menu .nav-link:hover,
  .nav-menu .nav-link:active { background: var(--primary-light); color: var(--primary); }
  .nav-menu .nav-link.is-active { background: var(--primary-light); color: var(--primary); }
  .nav-menu .nav-link:focus-visible { outline: 2px solid var(--primary); outline-offset: -2px; }

  /* The desktop underline becomes a small chevron on mobile. These selectors
     deliberately mirror the desktop ones so they win on specificity. */
  .nav-menu .nav-link::after,
  .nav-menu .nav-link:hover::after,
  .nav-menu .nav-link.is-active::after {
    content: '';
    position: static;
    width: 8px; height: 8px;
    border: solid currentColor;
    border-width: 2px 2px 0 0;
    border-radius: 0;
    background: none;
    opacity: .4;
    transform: rotate(45deg);
    transition: transform .2s ease, opacity .2s ease;
  }
  .nav-menu .nav-link:hover::after,
  .nav-menu .nav-link.is-active::after { opacity: .9; transform: translateX(3px) rotate(45deg); }

  /* ---- Sign In button at the bottom of the panel ---- */
  .nav-menu .nav-menu-cta {
    display: flex; justify-content: center; align-items: center;
    width: 100%; margin-top: 8px; padding: 16px 24px;
    border-radius: 14px;
    font-size: 15px;
  }

  /* ---- Gentle staggered entrance ---- */
  .nav-menu.active > * { animation: navItemIn .35s cubic-bezier(.2, .7, .2, 1) both; }
  .nav-menu.active > :nth-child(1) { animation-delay: .04s; }
  .nav-menu.active > :nth-child(2) { animation-delay: .08s; }
  .nav-menu.active > :nth-child(3) { animation-delay: .12s; }
  .nav-menu.active > :nth-child(4) { animation-delay: .16s; }
  .nav-menu.active > :nth-child(5) { animation-delay: .20s; }
}
@keyframes navItemIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: reduce) {
  .nav-menu, .nav-menu.active, .nav-backdrop, .nav-toggle, .nav-toggle span { transition: none !important; }
  .nav-menu.active > * { animation: none !important; }
}

/* =====================================================================
   Mobile: stop the scroll-reveal slide-in from widening the page.
   `from-right` elements start 44px to the right of their final spot; with
   only 20px of side padding on phones that pushed the page to ~414px wide on
   a 390px screen (side-scroll strip, and the fixed navbar/menu overflowed).
   On narrow screens they rise up into place instead of sliding sideways.
===================================================================== */
@media (max-width: 900px) {
  .reveal.from-left,
  .reveal.from-right { transform: translateY(32px); }
  .reveal.from-left.is-in,
  .reveal.from-right.is-in { transform: none; }
}