/* ========================================================================
   Lộc Minh IELTS — Components
   Reusable UI patterns. Requires tokens.css and base.css to be loaded first.

   Sections:
     1. Navigation (nav.top, .logo, .nav-links)
     2. Buttons (.btn family with ripple)
     3. Badge pill (.badge-pill with live pulse)
     4. Section headings (.section-head, .section-eyebrow)
     5. Forms (.form-inline, .form-message)
     6. FAQ accordion (details.faq)
     7. Info trigger (.info-trigger)
     8. Modal (.modal-backdrop, .modal-card, .modal-section)
     9. Footer (footer, .handle)
    10. Reveal animations (.reveal + variants)
   ======================================================================== */


/* ---- 1. Navigation ---------------------------------------------------- */

nav.top{
  position:relative;z-index:5;
  display:flex;justify-content:space-between;align-items:center;
  padding:22px 0;
}
.logo{
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-display);font-weight:700;
  font-size:20px;color:var(--ink);text-decoration:none;
}
.logo .dot{
  width:34px;height:34px;border-radius:9px;
  background:var(--ink);color:var(--white);
  display:grid;place-items:center;font-size:14px;font-weight:800;
}
.nav-links{display:flex;gap:28px;align-items:center}
.nav-links a:not(.btn){
  position:relative;
  color:var(--ink);text-decoration:none;font-weight:500;font-size:15px;
}
.nav-links a:not(.btn):hover{color:var(--blue-500)}
.nav-links a:not(.btn)::after{
  content:"";position:absolute;left:0;right:100%;bottom:-4px;height:2px;
  background:var(--blue-500);transition:right .25s ease;
}
.nav-links a:not(.btn):hover::after{right:0}

@media (max-width: 900px){
  .nav-links a:not(.btn){display:none}
}


/* ---- 2. Buttons ------------------------------------------------------- */

.btn{
  position:relative;overflow:hidden;
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 24px;border-radius:var(--radius-pill);
  font-weight:600;font-size:15px;text-decoration:none;
  transition:transform .18s ease, box-shadow .18s ease, background .2s ease;
  cursor:pointer;border:0;
  isolation:isolate; /* keep text above ::after ripple */
}
.btn:active{transform:translateY(0) scale(.97)}
.btn::after{
  content:"";position:absolute;inset:0;border-radius:inherit;
  background:radial-gradient(circle at var(--rx,50%) var(--ry,50%), rgba(255,255,255,.35) 0%, transparent 50%);
  opacity:0;transition:opacity .4s ease;pointer-events:none;
}
.btn:hover::after{opacity:1}

.btn-primary{background:var(--ink);color:#ffffff}
.btn-primary:hover{background:#1a2747;color:#ffffff;transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.btn-accent{background:var(--accent);color:var(--ink)}
.btn-accent:hover{background:var(--accent-deep);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.btn-ghost{background:transparent;color:var(--ink);border:1.5px solid var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--white)}


/* ---- 3. Badge pill (live indicator) ----------------------------------- */

.badge-pill{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--white);border:1px solid var(--line);
  padding:8px 16px;border-radius:var(--radius-pill);
  font-size:13px;font-weight:600;color:var(--blue-700);
  box-shadow:var(--shadow-sm);
}
.badge-pill .pulse{
  width:8px;height:8px;border-radius:50%;background:var(--success);
  box-shadow:0 0 0 0 rgba(43,194,117,.5);
  animation:pulse 1.8s infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(43,194,117,.5)}
  70%{box-shadow:0 0 0 12px rgba(43,194,117,0)}
  100%{box-shadow:0 0 0 0 rgba(43,194,117,0)}
}


/* ---- 4. Section headings --------------------------------------------- */

.section-head{text-align:center;max-width:680px;margin:0 auto 50px}
.section-eyebrow{
  display:inline-block;font-size:13px;font-weight:700;
  letter-spacing:.18em;text-transform:uppercase;
  color:var(--blue-500);margin-bottom:14px;
}
.section-head h2{
  font-family:var(--font-display);
  font-size:clamp(30px,4vw,46px);
  line-height:1.1;letter-spacing:-.01em;
  font-weight:700;text-transform:uppercase;
}
.section-head p{
  margin-top:14px;color:var(--ink-soft);font-size:17px;
}


/* ---- 5. Forms --------------------------------------------------------- */

/* Horizontal form with submit button — for CTAs, lead capture, etc. */
.form-inline{
  position:relative;
  display:flex;gap:12px;justify-content:center;flex-wrap:wrap;
  max-width:560px;margin:0 auto;
}
.form-inline input{
  flex:1 1 260px;padding:16px 22px;border-radius:var(--radius-pill);
  border:2px solid transparent;
  font-size:15px;font-family:inherit;
  background:var(--white);color:var(--ink);
  box-shadow:0 8px 24px -8px rgba(11,23,48,.4);
  transition:border-color .2s ease, box-shadow .2s ease, transform .15s ease;
}
.form-inline input::placeholder{color:#8A93AB;font-weight:500}
.form-inline input:hover{transform:translateY(-1px);box-shadow:0 12px 28px -8px rgba(11,23,48,.5)}
.form-inline input:focus{
  outline:none;
  border-color:var(--accent);
  box-shadow:0 12px 28px -6px rgba(11,23,48,.5), 0 0 0 4px rgba(255,183,43,.25);
}
.form-inline button[type="submit"]{
  padding:16px 32px;font-size:15.5px;font-weight:700;
  box-shadow:0 10px 24px -6px rgba(255,183,43,.5);
}
.form-inline button[type="submit"]:hover{
  box-shadow:0 14px 32px -8px rgba(255,183,43,.65);
}
.form-inline button[type="submit"]:disabled{
  opacity:.6;cursor:not-allowed;transform:none;
}

/* Status message under a form. Default = light background. */
.form-message{
  position:relative;
  margin:18px auto 0;max-width:560px;
  padding:14px 22px;border-radius:var(--radius-md);
  font-size:15px;font-weight:600;
  display:none;
}
.form-message.success{
  display:block;
  background:#E8F8EF;border:1px solid #B7E5CA;color:#136B3F;
}
.form-message.error{
  display:block;
  background:#FFE9E9;border:1px solid #F5BFBF;color:#8A1A1A;
}


/* ---- 6. FAQ accordion ------------------------------------------------- */

.faq-wrap{max-width:820px;margin:0 auto}
details.faq{
  background:var(--white);border:1px solid var(--line);
  border-radius:var(--radius-md);padding:20px 24px;margin-bottom:12px;
  transition:box-shadow .2s ease;
}
details.faq[open]{box-shadow:var(--shadow-sm)}
details.faq summary{
  cursor:pointer;list-style:none;
  display:flex;justify-content:space-between;align-items:center;
  font-weight:600;font-size:16px;color:var(--ink);
}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{
  content:"+";font-size:24px;font-weight:300;
  color:var(--blue-500);transition:transform .25s ease, color .2s ease;
}
details.faq[open] summary::after{content:"–";transform:rotate(180deg)}
details.faq p{margin-top:14px;color:var(--ink-soft);font-size:15px;line-height:1.6}


/* ---- 7. Info trigger (inline info button) ----------------------------- */

.info-trigger{
  display:inline-flex;align-items:center;justify-content:center;
  width:18px;height:18px;border-radius:50%;
  background:var(--blue-100);color:var(--blue-700);
  border:0;cursor:pointer;font-family:inherit;
  margin-left:6px;vertical-align:middle;
  transition:background .2s ease, transform .15s ease;
}
.info-trigger:hover{background:var(--blue-500);color:#fff;transform:scale(1.1)}
.info-trigger i{font-size:12px}
.info-trigger.lg{width:22px;height:22px}
.info-trigger.lg i{font-size:14px}


/* ---- 8. Modal --------------------------------------------------------- */

.modal-backdrop{
  position:fixed;inset:0;z-index:1000;
  background:rgba(11,23,48,.55);backdrop-filter:blur(6px);
  display:flex;align-items:center;justify-content:center;
  padding:24px;
  opacity:0;pointer-events:none;
  transition:opacity .25s ease;
}
.modal-backdrop.open{opacity:1;pointer-events:auto}
.modal-card{
  background:var(--white);border-radius:var(--radius-xl);
  max-width:680px;width:100%;max-height:90vh;overflow-y:auto;
  box-shadow:0 50px 100px -20px rgba(11,23,48,.5);
  transform:scale(.95) translateY(20px);
  transition:transform .3s cubic-bezier(.2,.7,.2,1);
}
.modal-backdrop.open .modal-card{transform:scale(1) translateY(0)}
.modal-header{
  display:flex;align-items:flex-start;justify-content:space-between;
  padding:28px 32px 16px;gap:16px;
}
.modal-header .h-left{flex:1}
.modal-header .h-eyebrow{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.1em;
  text-transform:uppercase;color:var(--blue-500);margin-bottom:8px;
}
.modal-header h3{
  font-family:var(--font-display);
  font-size:24px;line-height:1.2;letter-spacing:-.01em;
}
.modal-close{
  flex-shrink:0;width:36px;height:36px;border-radius:50%;
  background:var(--bg-soft);color:var(--ink-soft);
  border:0;cursor:pointer;display:grid;place-items:center;
  transition:background .2s ease, color .2s ease;
}
.modal-close:hover{background:var(--ink);color:#fff}
.modal-close i{font-size:18px}

.modal-body{padding:8px 32px 28px}
.modal-section{
  background:var(--bg-page);border-radius:var(--radius-md);
  padding:18px 20px;margin-bottom:12px;
  border:1px solid var(--line);
}
.modal-section .ms-head{
  display:flex;align-items:center;gap:10px;margin-bottom:10px;
  font-weight:700;font-size:14px;color:var(--ink);
}
.modal-section .ms-head i{
  color:var(--blue-500);font-size:18px;
  background:var(--white);width:32px;height:32px;border-radius:var(--radius-sm);
  display:grid;place-items:center;border:1px solid var(--line);
}
.modal-section ul{list-style:none;padding-left:0;margin:0}
.modal-section li{
  display:flex;align-items:flex-start;gap:10px;
  font-size:14px;color:var(--ink-soft);padding:5px 0;line-height:1.5;
}
.modal-section li i{color:var(--success);font-size:14px;margin-top:3px;flex-shrink:0}
.modal-section li b{color:var(--ink);font-weight:700}

/* "Choice" variant — highlighted with accent */
.modal-section.choice{background:#FFF9EB;border-color:#F5E0A1}
.modal-section.choice .ms-head i{color:var(--accent-deep);background:var(--accent-soft);border-color:#F5E0A1}

.modal-choices{display:grid;gap:8px}
.modal-choice{
  background:var(--white);border:1px solid #F5E0A1;border-radius:10px;
  padding:12px 14px;display:flex;gap:12px;align-items:flex-start;
}
.modal-choice .num{
  flex-shrink:0;width:24px;height:24px;border-radius:50%;
  background:var(--accent);color:var(--ink);
  display:grid;place-items:center;font-weight:800;font-size:12px;
}
.modal-choice .ct{font-size:13.5px;color:var(--ink);line-height:1.5}
.modal-choice .ct b{font-weight:700}

.modal-footer{
  padding:16px 32px 24px;border-top:1px solid var(--line);
  font-size:12px;color:var(--ink-mute);
  display:flex;align-items:center;gap:6px;
}
.modal-footer i{color:var(--blue-500);font-size:14px}


/* ---- 9. Footer -------------------------------------------------------- */

footer{
  background:var(--white);padding:40px 0;border-top:1px solid var(--line);
}
.foot-row{
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px;
}
.handles{display:flex;gap:14px;flex-wrap:wrap}
.handle{
  background:var(--white);border:1.5px solid var(--ink);
  padding:10px 20px;border-radius:var(--radius-pill);
  font-weight:600;font-size:14px;color:var(--ink);text-decoration:none;
  transition:transform .2s ease, background .2s ease, color .2s ease;
}
.handle:hover{transform:translateY(-2px);background:var(--ink);color:var(--white)}
.copyright{font-size:13px;color:var(--ink-soft)}


/* ---- 10. Reveal animations ------------------------------------------- */
/* Add `.reveal` to any element, then toggle `.in` (via IntersectionObserver)
   when it enters the viewport. Optional modifiers:
     .delay-1 / -2 / -3 / -4   stagger delays
     .from-left / .from-right  slide-in instead of fade-up
     .zoom                     scale-in
   `prefers-reduced-motion` is handled globally in base.css. */

.reveal{
  opacity:0;transform:translateY(24px);
  transition:opacity .55s ease, transform .55s cubic-bezier(.2,.7,.2,1);
  will-change:opacity, transform;
}
.reveal.in{opacity:1;transform:translateY(0)}
.reveal.delay-1{transition-delay:.08s}
.reveal.delay-2{transition-delay:.16s}
.reveal.delay-3{transition-delay:.24s}
.reveal.delay-4{transition-delay:.32s}

.reveal.from-left{transform:translateX(-30px)}
.reveal.from-left.in{transform:translateX(0)}
.reveal.from-right{transform:translateX(30px)}
.reveal.from-right.in{transform:translateX(0)}
.reveal.zoom{transform:scale(.96)}
.reveal.zoom.in{transform:scale(1)}

@media (prefers-reduced-motion: reduce){
  .reveal,.reveal.from-left,.reveal.from-right,.reveal.zoom{
    opacity:1!important;transform:none!important;transition:none!important;
  }
}