/* =====================================================================
   AISEOCourse — Course pages CSS
   Extends styles.css — for /courses/, /courses/basic/, /courses/standard/,
   lesson pages, and the certificate page.
   ===================================================================== */

/* =====================================================================
   COURSE SELECTION PAGE
   ===================================================================== */
.courses-hero { padding-block: clamp(48px, 8vw, 100px) clamp(24px, 4vw, 48px); }
.courses-hero h1 {
  font-size: var(--step-4); font-weight: 800;
  letter-spacing: -0.035em; line-height: 1; margin-top: 1rem;
}
.courses-hero__sub {
  margin-top: 1.4rem; font-size: var(--step-1);
  color: var(--muted); max-width: 44ch; line-height: 1.45;
}

/* Two-card grid */
.pick-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(20px, 3vw, 36px);
  margin-top: clamp(32px, 5vw, 56px);
}

.pick {
  border-radius: 28px;
  padding: clamp(28px, 4vw, 48px);
  display: flex; flex-direction: column;
  position: relative; overflow: hidden;
  transition: transform .3s ease, box-shadow .3s ease;
}
.pick:hover { transform: translateY(-6px); box-shadow: 0 32px 64px -40px rgba(24,34,53,.3); }

.pick--basic {
  background:
    radial-gradient(120% 140% at 100% 0%, var(--lavender), transparent 60%),
    radial-gradient(120% 140% at 0% 100%, var(--sky), transparent 60%),
    #fff;
  border: 1.5px solid var(--line);
}
.pick--standard {
  background:
    radial-gradient(120% 160% at 100% 0%, color-mix(in srgb, var(--lavender) 26%, transparent), transparent 60%),
    var(--ink);
  color: #fff;
}

/* Badge */
.pick__badge {
  display: inline-block; align-self: flex-start;
  padding: .3em .9em; border-radius: 999px;
  font-size: var(--step--1); font-weight: 700;
  background: var(--mint); color: var(--ink);
  margin-bottom: 1.4rem;
  letter-spacing: .01em;
}
.pick__badge--dark {
  background: rgba(255,255,255,.15);
  color: #fff;
  border: 1px solid rgba(255,255,255,.25);
}

.pick__eyebrow { font-size: var(--step--1); font-weight: 600; opacity: .6; margin-bottom: .4rem; }
.pick--standard .pick__eyebrow { color: rgba(255,255,255,.65); }
.pick__title { font-size: var(--step-2); font-weight: 800; letter-spacing: -0.03em; line-height: 1.04; }
.pick__desc { margin-top: 1rem; font-size: var(--step-0); line-height: 1.6; color: color-mix(in srgb, var(--ink) 78%, transparent); max-width: 36ch; }
.pick--standard .pick__desc { color: rgba(255,255,255,.75); }

/* Feature list */
.pick__features {
  margin-top: 1.6rem; display: grid; gap: .6rem; flex: 1;
}
.pick__features li {
  position: relative; padding-left: 1.7rem;
  font-size: var(--step-0); font-weight: 500;
  color: color-mix(in srgb, var(--ink) 85%, transparent);
}
.pick--standard .pick__features li { color: rgba(255,255,255,.85); }
.pick__features li::before {
  content: ""; position: absolute; left: 0; top: .2em;
  width: 18px; height: 18px; border-radius: 999px;
  background-color: var(--ink);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 13l4 4L19 7'/%3E%3C/svg%3E") center / 70% no-repeat;
          mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 13l4 4L19 7'/%3E%3C/svg%3E") center / 70% no-repeat;
}
.pick--standard .pick__features li::before { background-color: var(--mint); }

/* Meta row */
.pick__meta {
  display: flex; gap: 1rem; align-items: center;
  margin-top: 1.6rem; font-size: var(--step--1); font-weight: 600;
  color: var(--muted); flex-wrap: wrap;
}
.pick--standard .pick__meta { color: rgba(255,255,255,.55); }
.pick__time { display: inline-flex; align-items: center; gap: .35em; }
.pick__time svg { width: 14px; height: 14px; }
.pick__level { padding: .2em .7em; border-radius: 999px; border: 1px solid var(--line); }
.pick--standard .pick__level { border-color: rgba(255,255,255,.2); }

/* CTA */
.pick__cta { margin-top: 1.8rem; align-self: flex-start; }
.pick--standard .pick__cta { background: #fff; color: var(--ink); }
.pick--standard .pick__cta:hover { transform: translateY(-2px); box-shadow: 0 14px 30px -14px rgba(0,0,0,.5); }

/* Not sure nudge */
.pick-quiz-nudge {
  display: flex; align-items: center; gap: .8rem;
  margin-top: clamp(24px, 3vw, 36px);
  padding: 1.2rem 1.6rem; border-radius: 16px;
  background: color-mix(in srgb, var(--yellow) 50%, var(--bg));
  border: 1px solid var(--line);
  font-size: var(--step-0);
}
.pick-quiz-nudge svg { width: 24px; height: 24px; flex: none; color: var(--muted); }
.pick-quiz-nudge p { color: color-mix(in srgb, var(--ink) 80%, transparent); }
.pick-quiz-nudge a { color: var(--ink); font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }

/* =====================================================================
   CURRICULUM OUTLINE
   ===================================================================== */
.course-outline { background: var(--bg); }
.course-outline--dark {
  background:
    radial-gradient(120% 160% at 100% 0%, color-mix(in srgb, var(--lavender) 20%, transparent), transparent 55%),
    var(--ink);
  color: #fff;
}
.course-outline--dark h2 { color: #fff; }

.outline-head { max-width: 46ch; }

.template-pills {
  display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1.6rem;
}
.template-pill {
  padding: .35em .9em; border-radius: 999px;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.22);
  font-size: var(--step--1); font-weight: 600; color: rgba(255,255,255,.9);
}

.outline-list {
  display: grid; gap: 1px;
  margin-top: clamp(32px, 5vw, 56px);
  border: 1px solid var(--line); border-radius: 22px;
  overflow: hidden; background: var(--line);
}
.outline-list--light {
  border-color: rgba(255,255,255,.1);
  background: rgba(255,255,255,.06);
}

.outline-item {
  display: flex; gap: clamp(16px, 2.5vw, 32px);
  padding: clamp(20px, 2.5vw, 30px) clamp(20px, 2.5vw, 30px);
  background: #fff; align-items: flex-start;
  transition: background .2s ease;
}
.outline-list--light .outline-item { background: rgba(255,255,255,.04); }
.outline-item:hover { background: color-mix(in srgb, var(--sky) 25%, #fff); }
.outline-list--light .outline-item:hover { background: rgba(255,255,255,.09); }

.outline-num {
  font-family: var(--font-hand); font-size: 1.8rem; font-weight: 700;
  color: var(--muted); line-height: 1; flex: none; min-width: 2.2em; padding-top: .1em;
}
.outline-list--light .outline-num { color: rgba(255,255,255,.35); }

.outline-body h3 { font-size: var(--step-1); font-weight: 700; letter-spacing: -0.02em; }
.outline-list--light .outline-body h3 { color: #fff; }
.outline-body p { color: var(--muted); margin-top: .4rem; font-size: var(--step-0); }
.outline-list--light .outline-body p { color: rgba(255,255,255,.62); }
.outline-body em { font-style: normal; font-weight: 600; color: color-mix(in srgb, var(--ink) 65%, transparent); }
.outline-list--light .outline-body em { color: rgba(255,255,255,.55); }
.outline-meta {
  display: inline-block; margin-top: .6rem;
  font-size: var(--step--1); font-weight: 600;
  color: color-mix(in srgb, var(--muted) 80%, transparent);
  padding: .2em .7em; background: var(--bg); border-radius: 999px;
  border: 1px solid var(--line);
}
.outline-list--light .outline-meta { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.15); color: rgba(255,255,255,.45); }

.outline-cta { margin-top: clamp(28px, 4vw, 48px); }

/* =====================================================================
   BASIC COURSE LANDING
   ===================================================================== */
.course-landing-hero {
  padding-block: clamp(40px, 7vw, 88px);
  position: relative; overflow: hidden;
}
.course-landing__eyebrow { margin-bottom: .6rem; }
.course-landing h1 {
  font-size: var(--step-3); font-weight: 800;
  letter-spacing: -0.035em; line-height: 1.02; max-width: 18ch;
}
.course-landing__desc { margin-top: 1.2rem; font-size: var(--step-1); color: var(--muted); max-width: 44ch; }
.course-landing__meta { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1.6rem; }
.course-landing__pill {
  display: inline-flex; align-items: center; gap: .4em;
  padding: .35em .9em; border-radius: 999px;
  font-size: var(--step--1); font-weight: 600;
  background: #fff; border: 1px solid var(--line); color: var(--ink);
}
.course-landing__pill svg { width: 14px; height: 14px; }
.course-landing__cta { margin-top: 2rem; display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; }

/* Progress bar (for lesson pages) */
.lesson-progress { position: sticky; top: 64px; z-index: 40; }
.lesson-progress__bar {
  height: 4px; background: var(--line);
}
.lesson-progress__fill {
  height: 100%; border-radius: 999px;
  background: linear-gradient(90deg, var(--pink), var(--lavender), var(--sky));
  transition: width .5s cubic-bezier(.22,1,.36,1);
}
.lesson-progress__label {
  display: flex; justify-content: space-between; align-items: center;
  padding: .6rem var(--gutter);
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(8px);
  font-size: var(--step--1); font-weight: 600; color: var(--muted);
  border-bottom: 1px solid var(--line);
}
.lesson-progress__label a { color: var(--ink); text-decoration: underline; text-underline-offset: 2px; }

/* Lesson layout */
.lesson { max-width: 76ch; margin-inline: auto; padding-inline: var(--gutter); padding-block: clamp(40px, 6vw, 80px); }
.lesson__head { margin-bottom: 2.4rem; }
.lesson__eyebrow { margin-bottom: .6rem; }
.lesson h1 { font-size: var(--step-3); font-weight: 800; letter-spacing: -0.035em; line-height: 1.04; }
.lesson__lede { margin-top: 1.2rem; font-size: var(--step-1); color: var(--muted); max-width: 44ch; line-height: 1.5; }
.lesson__divider { border: none; border-top: 1px solid var(--line); margin-block: 2.8rem; }

/* Lesson content prose */
.lesson__body { font-size: var(--step-0); }
.lesson__body > * + * { margin-top: 1.2rem; }
.lesson__body h2 { font-size: var(--step-2); font-weight: 700; letter-spacing: -0.025em; margin-top: 2.8rem; scroll-margin-top: 100px; }
.lesson__body h3 { font-size: var(--step-1); font-weight: 700; letter-spacing: -0.02em; margin-top: 2rem; }
.lesson__body p { color: color-mix(in srgb, var(--ink) 84%, transparent); line-height: 1.75; }
.lesson__body ul, .lesson__body ol { padding-left: 1.3rem; display: grid; gap: .5rem; }
.lesson__body ul { list-style: disc; }
.lesson__body ol { list-style: decimal; }
.lesson__body li { color: color-mix(in srgb, var(--ink) 82%, transparent); line-height: 1.65; }
.lesson__body strong { font-weight: 700; color: var(--ink); }
.lesson__body a { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }

/* Callout box inside lesson */
.lesson__callout {
  border-left: 3px solid var(--lavender);
  background: color-mix(in srgb, var(--lavender) 25%, var(--bg));
  border-radius: 0 14px 14px 0;
  padding: 1.2rem 1.4rem;
  margin-block: 2rem;
}
.lesson__callout p { color: var(--ink) !important; font-weight: 500; }
.lesson__callout strong { font-weight: 800; }

/* Key term highlight */
.lesson__term {
  display: inline-block;
  background: color-mix(in srgb, var(--yellow) 60%, transparent);
  border-radius: 4px; padding: 0 .25em;
  font-weight: 600;
}

/* =====================================================================
   QUIZ BLOCK (end of lesson)
   ===================================================================== */
.lesson-quiz {
  margin-top: 3rem; border: 1.5px solid var(--line);
  border-radius: 24px; overflow: hidden; background: #fff;
  box-shadow: 0 20px 50px -30px rgba(24,34,53,.25);
}
.lesson-quiz__head {
  padding: 1.4rem 1.8rem; border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--sky) 30%, var(--bg));
  display: flex; align-items: center; gap: .8rem;
}
.lesson-quiz__head h2 { font-size: var(--step-1); font-weight: 700; letter-spacing: -0.02em; }
.lesson-quiz__head svg { width: 22px; height: 22px; color: var(--ink); flex: none; }
.lesson-quiz__body { padding: 1.8rem; }

.quiz-question { display: none; }
.quiz-question.is-active { display: block; }
.quiz-question__text { font-size: var(--step-1); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 1.2rem; }
.quiz-options { display: grid; gap: .7rem; }
.quiz-option {
  text-align: left; border: 1.5px solid var(--line); border-radius: 14px;
  padding: .9rem 1.2rem; font-weight: 600; background: var(--bg);
  display: flex; justify-content: space-between; align-items: center;
  transition: border-color .2s, background .2s, transform .2s;
  cursor: pointer; font-size: var(--step-0);
}
.quiz-option::after { content: "→"; opacity: .3; transition: transform .2s, opacity .2s; }
.quiz-option:hover { border-color: var(--ink); background: #fff; transform: translateY(-1px); }
.quiz-option:hover::after { transform: translateX(4px); opacity: .7; }
.quiz-option.is-correct { border-color: #22c55e; background: color-mix(in srgb, var(--mint) 60%, #fff); color: #166534; }
.quiz-option.is-correct::after { content: "✓"; opacity: 1; }
.quiz-option.is-wrong { border-color: #ef4444; background: color-mix(in srgb, var(--pink) 60%, #fff); color: #991b1b; }
.quiz-option.is-wrong::after { content: "✗"; opacity: 1; }
.quiz-option:disabled, .quiz-option[disabled] { cursor: default; }

.quiz-feedback { margin-top: 1rem; padding: .9rem 1.1rem; border-radius: 12px; font-weight: 600; display: none; }
.quiz-feedback.is-correct { background: color-mix(in srgb, var(--mint) 50%, #fff); color: #166534; display: block; }
.quiz-feedback.is-wrong { background: color-mix(in srgb, var(--pink) 60%, #fff); color: #991b1b; display: block; }

.quiz-nav { display: flex; justify-content: space-between; align-items: center; margin-top: 1.4rem; }
.quiz-counter { font-size: var(--step--1); font-weight: 600; color: var(--muted); }

/* Quiz result panel */
.quiz-result { text-align: center; padding: 2rem 1.8rem; display: none; }
.quiz-result.is-active { display: block; }
.quiz-result__score {
  font-family: var(--font-hand); font-size: 3.6rem; font-weight: 700;
  color: var(--ink); line-height: 1;
}
.quiz-result__msg { margin-top: .8rem; font-size: var(--step-1); font-weight: 700; }
.quiz-result__sub { margin-top: .5rem; color: var(--muted); font-size: var(--step-0); }
.quiz-result__cta { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; margin-top: 1.6rem; }
.quiz-retake { color: var(--muted); font-weight: 600; text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }

/* =====================================================================
   LESSON NAVIGATION
   ===================================================================== */
.lesson-nav {
  display: flex; justify-content: space-between; align-items: center;
  gap: 1rem; flex-wrap: wrap; margin-top: 2.8rem;
  padding-top: 2rem; border-top: 1px solid var(--line);
}
.lesson-nav__prev, .lesson-nav__next {
  display: inline-flex; align-items: center; gap: .5rem;
  font-weight: 700; padding: .8em 1.4em; border-radius: 999px;
  border: 1.5px solid var(--line); transition: background .2s, border-color .2s, transform .2s;
  font-size: var(--step-0);
}
.lesson-nav__prev { color: var(--muted); }
.lesson-nav__prev:hover { border-color: var(--ink); color: var(--ink); background: #fff; }
.lesson-nav__next { background: var(--ink); color: #fff; border-color: var(--ink); }
.lesson-nav__next:hover { transform: translateY(-2px); box-shadow: 0 12px 28px -10px rgba(24,34,53,.45); }
.lesson-nav svg { width: 1em; height: 1em; }

/* Mark complete button */
.lesson-complete {
  display: flex; align-items: center; justify-content: center;
  gap: .8rem; flex-wrap: wrap;
  padding: 1.4rem 1.8rem; background: color-mix(in srgb, var(--mint) 40%, var(--bg));
  border: 1.5px solid color-mix(in srgb, var(--mint) 80%, var(--line));
  border-radius: 18px; margin-top: 2rem;
}
.lesson-complete p { font-weight: 600; color: color-mix(in srgb, var(--ink) 80%, transparent); }
.lesson-complete.is-done { background: color-mix(in srgb, var(--mint) 70%, var(--bg)); }
.lesson-complete.is-done p::before { content: "✓ "; color: #22c55e; }

/* =====================================================================
   CERTIFICATE PAGE
   ===================================================================== */
.cert-page { max-width: 760px; margin-inline: auto; padding-inline: var(--gutter); padding-block: clamp(48px, 8vw, 100px); text-align: center; }
.cert-page h1 { font-size: var(--step-3); font-weight: 800; letter-spacing: -0.03em; }
.cert-page__sub { margin-top: 1rem; color: var(--muted); font-size: var(--step-1); }
.cert-form { margin-top: 2.4rem; display: flex; flex-direction: column; align-items: center; gap: 1rem; }
.cert-form label { font-weight: 700; font-size: var(--step-0); }
.cert-form input {
  width: 100%; max-width: 380px; padding: .9em 1.2em;
  border: 1.5px solid var(--line); border-radius: 14px;
  font: inherit; font-size: var(--step-1); text-align: center;
  background: #fff; transition: border-color .2s;
}
.cert-form input:focus { outline: none; border-color: var(--ink); }
.cert-form input::placeholder { color: var(--muted); }

/* Certificate preview */
.cert-preview {
  margin-top: 2.4rem; border-radius: 24px; overflow: hidden;
  border: 1.5px solid var(--line);
  background:
    radial-gradient(120% 140% at 12% 14%, var(--pink), transparent 55%),
    radial-gradient(120% 140% at 88% 10%, var(--lavender), transparent 55%),
    radial-gradient(120% 120% at 30% 100%, var(--sky), transparent 55%),
    var(--yellow);
  padding: clamp(32px, 5vw, 64px);
  position: relative;
}
.cert-preview__org { font-size: var(--step--1); font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: color-mix(in srgb, var(--ink) 55%, transparent); }
.cert-preview__issued { margin-top: .4rem; font-size: var(--step-0); color: var(--muted); }
.cert-preview__title { font-size: var(--step-3); font-weight: 800; letter-spacing: -0.03em; line-height: 1; margin-top: 1.4rem; }
.cert-preview__name { font-family: var(--font-hand); font-size: clamp(2rem, 5vw, 3.4rem); font-weight: 700; margin-top: 1.2rem; color: var(--ink); }
.cert-preview__course { margin-top: .8rem; font-size: var(--step-1); color: color-mix(in srgb, var(--ink) 70%, transparent); font-weight: 600; }
.cert-preview__sig { margin-top: 2rem; font-size: var(--step--1); color: var(--muted); }
.cert-preview__sig strong { display: block; font-size: var(--step-0); color: var(--ink); font-weight: 800; margin-top: .2rem; }

/* =====================================================================
   RESPONSIVE
   ===================================================================== */
@media (max-width: 860px) {
  .pick-grid { grid-template-columns: 1fr; }
  .pick { max-width: 560px; }
}
@media (max-width: 720px) {
  .outline-item { flex-direction: column; gap: .4rem; }
  .lesson-nav { flex-direction: column; align-items: stretch; }
  .lesson-nav__prev, .lesson-nav__next { justify-content: center; }
}