/* =====================================================================
   KayScience — Videos & Quizzes landing CSS
   Static rebuild of KS_Videos Page.pdf. Builds ONLY the page-specific
   sections; header, footer, tokens, buttons and helpers come from
   ks-common.css. Namespaced under .ks-videos / kv- to avoid collisions.
   ===================================================================== */

.ks-scope main:has(.kv-hero) { padding-top: 0; }
.ks-videos { overflow-x: clip; }

.kv-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  text-transform: uppercase; letter-spacing: .1em;
  font-size: 11px; font-weight: 700; color: var(--ks-purple-deep);
}
.kv-eyebrow svg { width: 14px; height: 14px; }

/* =====================================================================
   1. HERO
   ===================================================================== */
.kv-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(80% 120% at 92% 20%, rgba(120, 214, 197, .55) 0%, rgba(120, 214, 197, 0) 55%),
    radial-gradient(70% 90% at 55% 15%, rgba(150, 200, 245, .28) 0%, rgba(150, 200, 245, 0) 60%),
    linear-gradient(103deg, #f5f3fd 0%, #ece9fb 22%, #dfe8f6 46%, #bfe6da 78%, #a6e0d1 100%);
}
.kv-hero__inner {
  position: relative; z-index: 1;
  max-width: 1320px; margin: 0 auto;
  padding: 150px 30px 100px;
  display: grid; grid-template-columns: .9fr 1.1fr;
  align-items: center; gap: 30px;
}
.kv-hero__content { max-width: 540px; }
.kv-hero h1 {
  font-weight: 700;
  font-size: clamp(32px, 3.4vw, 48px);
  line-height: 1.16;
  color: var(--ks-navy);
  margin: 0 0 20px;
  letter-spacing: -.01em;
}
.kv-hero__desc { font-size: 17px; line-height: 1.6; color: var(--ks-navy-soft); margin: 0 0 22px; max-width: 500px; }
.kv-checks { list-style: none; margin: 0 0 30px; padding: 0; display: flex; flex-direction: column; gap: 12px; }
.kv-checks li { display: flex; align-items: flex-start; gap: 12px; font-size: 15px; color: var(--ks-navy-soft); }
.kv-checks img.ks-tick { width: 19px; height: 19px; flex: none; margin-top: 2px; }
.kv-hero__ctas { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }

/* ---- Hero media cluster ---- */
.kv-hero__media { position: relative; min-height: 560px; }
.kv-card {
  position: absolute; background: #fff; border-radius: 20px;
  box-shadow: 0 22px 50px rgba(72, 72, 168, .16);
}
.kv-card__badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 10.5px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  color: var(--ks-purple-deep); background: #ece9fb;
  padding: 5px 10px; border-radius: 8px; margin-bottom: 10px;
}

/* Big video-lesson card */
.kv-video { top: 0; right: -30px; width: 520px; padding: 16px; z-index: 3; }
.kv-video__frame {
  position: relative; border-radius: 14px; overflow: hidden;
  background: linear-gradient(135deg, #2c2c54, #1c1c3a);
  aspect-ratio: 16/9; display: flex; align-items: flex-end;
}
.kv-video__frame img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center 15%; opacity: .92; }
.kv-video__diagram {
  position: absolute; top: 14px; right: 14px; width: 96px; height: 96px;
  background: rgba(255,255,255,.94); border-radius: 14px; display: grid; place-items: center;
}
.kv-video__diagram svg { width: 66px; height: 66px; }
.kv-video__play {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 56px; height: 56px; border-radius: 50%; background: rgba(255,255,255,.92);
  display: grid; place-items: center; color: var(--ks-purple-deep);
}
.kv-video__play svg { width: 22px; height: 22px; }
.kv-video__caption {
  position: relative; z-index: 1; width: 100%; padding: 12px 14px;
  background: linear-gradient(0deg, rgba(0,0,0,.55), transparent);
  display: flex; align-items: center; justify-content: space-between; color: #fff;
}
.kv-video__caption b { font-size: 13.5px; font-weight: 600; display: block; }
.kv-video__caption span { font-size: 11.5px; opacity: .85; }
.kv-video__stats { display: flex; align-items: center; gap: 10px; margin-top: 12px; }
.kv-video__pill {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 11.5px; font-weight: 600; color: var(--ks-navy);
  background: #f2f2fa; border-radius: 20px; padding: 6px 12px;
}
.kv-video__pill svg { width: 13px; height: 13px; color: #37b89e; }

/* Flashcard mini card */
.kv-flash { top: 8px; left: -34px; width: 254px; padding: 16px 18px; z-index: 4; }
.kv-flash p { margin: 0 0 12px; font-size: 13.5px; font-weight: 600; color: var(--ks-navy); line-height: 1.4; }
.kv-flash__foot { display: flex; align-items: center; justify-content: space-between; font-size: 11.5px; color: var(--ks-muted); }
.kv-flash__foot b { color: #37b89e; font-weight: 700; }

/* Exam questions mini card */
.kv-exam { bottom: 40px; left: -50px; width: 240px; padding: 16px 18px; z-index: 4; }
.kv-exam__row { display: flex; align-items: center; gap: 14px; margin-bottom: 10px; }
.kv-exam__num { font-size: 30px; font-weight: 700; color: var(--ks-navy); line-height: 1; }
.kv-exam__bar { flex: 1; height: 6px; border-radius: 4px; background: #eceafb; overflow: hidden; }
.kv-exam__bar i { display: block; width: 60%; height: 100%; background: var(--ks-purple-deep); border-radius: 4px; }
.kv-exam p { margin: 0; font-size: 11.5px; color: var(--ks-navy-soft); line-height: 1.4; }

/* Live lesson reminder mini card */
.kv-live { bottom: -6px; right: -20px; width: 250px; padding: 14px 16px; z-index: 5; display: flex; align-items: center; gap: 12px; }
.kv-live__ico {
  width: 40px; height: 40px; border-radius: 11px; flex: none; display: grid; place-items: center;
  background: #dff5ef; color: #37b89e;
}
.kv-live__ico svg { width: 20px; height: 20px; }
.kv-live b { display: block; font-size: 13px; font-weight: 700; color: var(--ks-navy); }
.kv-live span { font-size: 11.5px; color: var(--ks-muted); }

/* =====================================================================
   2. MOST STUDENTS DON'T STRUGGLE (comparison strip)
   ===================================================================== */
.kv-lose { padding: 96px 0 70px; }
.kv-lose__head { display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; margin-bottom: 54px; }
.kv-lose__head h2 { margin: 0; }
.kv-lose__cta { flex: none; }
.kv-lose__grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.kv-lose__card {
  background: #fff; border: 1px solid rgba(72, 72, 168, .06); border-radius: 20px;
  box-shadow: 0 14px 34px rgba(72, 72, 168, .07);
  padding: 14px 18px 24px; text-align: left;
}
.kv-lose__ico { width: 100%; aspect-ratio: 1.35/1; border-radius: 16px; margin: 0 0 18px; display: grid; place-items: center; background: linear-gradient(165deg, #eafaf5 0%, #b9e9dd 100%); }
.kv-lose__ico img { width: 58px; height: 58px; object-fit: contain; }
.kv-lose__ico--ks { background: linear-gradient(165deg, #7fd6c2 0%, #8f86d6 100%); }
.kv-lose__card h3 { margin: 0 0 12px; font-size: 17px; font-weight: 700; color: var(--ks-navy); }
.kv-lose__card ul { list-style: none; margin: 0; padding: 0; }
.kv-lose__card li { display: flex; align-items: center; gap: 8px; font-size: 11.5px; font-weight: 700; letter-spacing: .03em; text-transform: uppercase; color: var(--ks-navy); line-height: 1.9; }
.kv-lose__mark { display: inline-flex; flex: none; }
.kv-lose__mark img { width: 13px; height: 13px; object-fit: contain; }

/* =====================================================================
   3. THE SCIENCE BEHIND (circular cycle)
   ===================================================================== */
.kv-cycle { position: relative; padding: 90px 0 100px; text-align: center; }
.kv-cycle::before {
  content: ""; position: absolute; left: 50%; top: 0;
  width: 160%; height: 110%; transform: translateX(-50%);
  background: radial-gradient(58% 82% at 50% 8%, #e7e3f7 0%, #dfe6f6 34%, #d2ecf4 60%, rgba(234,246,249,0) 82%);
  border-radius: 0 0 50% 50%; z-index: 0; pointer-events: none;
}
.kv-cycle__inner { position: relative; z-index: 1; }
.kv-cycle h2 { margin: 0 0 14px; }
.kv-cycle__sub { max-width: 620px; margin: 0 auto 60px; font-size: 16px; color: var(--ks-navy-soft); }

.kv-ring-wrap { position: relative; max-width: 940px; margin: 0 auto; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 18px; }
.kv-ring-col { display: flex; flex-direction: column; gap: 130px; }
.kv-ring-col--right { align-items: flex-end; text-align: right; }
.kv-ring-col--left { align-items: flex-start; text-align: left; }
.kv-ring-col .kv-step { max-width: 240px; }

.kv-step__card {
  display: inline-flex; align-items: baseline; gap: 10px;
  background: linear-gradient(160deg, rgba(255,255,255,.9), rgba(255,255,255,.5));
  border: 1px solid rgba(255,255,255,.8);
  border-radius: 18px; padding: 12px 18px; box-shadow: 0 12px 26px rgba(72,72,168,.10);
  margin-bottom: 6px;
}
.kv-step__no { font-size: 30px; font-weight: 700; color: var(--ks-navy); line-height: 1; }
.kv-step__label { display: block; font-size: 13px; font-weight: 700; letter-spacing: .06em; color: var(--ks-navy); text-transform: uppercase; }
.kv-step__desc { margin: 0; font-size: 13px; color: var(--ks-navy-soft); padding: 0 4px; }

.kv-ring { position: relative; width: 340px; height: 340px; display: grid; place-items: center; }

/* 6-petal flower — each petal is a rotated square with one sharp corner (the
   flower's center) and three rounded corners, fanned out at 60° increments. */
.kv-petal {
  position: absolute; left: 50%; top: 50%;
  width: 132px; height: 132px; margin: -132px 0 0 0;
  border-radius: 46% 46% 46% 6%;
  transform-origin: 0% 100%;
  opacity: .9;
}
.kv-petal--1 { transform: rotate(-60deg);  background: linear-gradient(135deg, #d3f3e9, #a9e6d3); }
.kv-petal--2 { transform: rotate(0deg);    background: linear-gradient(135deg, #dcebfb, #b7d6f5); }
.kv-petal--3 { transform: rotate(60deg);   background: linear-gradient(135deg, #e7e2fa, #c9bdf0); }
.kv-petal--4 { transform: rotate(120deg);  background: linear-gradient(135deg, #f7e2f2, #e9bfe0); }
.kv-petal--5 { transform: rotate(180deg);  background: linear-gradient(135deg, #fbecdd, #f0d2ae); }
.kv-petal--6 { transform: rotate(240deg);  background: linear-gradient(135deg, #d9f3ec, #a9e3d8); }

.kv-ring__hole {
  position: relative; z-index: 2;
  width: 118px; height: 118px; border-radius: 50%; background: #fff;
  box-shadow: 0 8px 26px rgba(72,72,168,.14);
}
.kv-ring__mark {
  position: absolute; z-index: 3; width: 60px; height: 60px; border-radius: 50%; background: #fff;
  box-shadow: 0 10px 22px rgba(72,72,168,.16); display: grid; place-items: center;
}
.kv-ring__mark img { width: 30px; height: 30px; object-fit: contain; }
.kv-ring__mark span { position: absolute; bottom: -25px; font-size: 14px; font-weight: 700; color: var(--ks-navy); }
.kv-ring__mark--1 { top: 4%;  left: 50%; transform: translateX(-50%); }
.kv-ring__mark--2 { top: 22%; right: 0%; }
.kv-ring__mark--3 { bottom: 22%; right: 0%; }
.kv-ring__mark--4 { bottom: 4%; left: 50%; transform: translateX(-50%); }
.kv-ring__mark--5 { bottom: 22%; left: 0%; }
.kv-ring__mark--6 { top: 22%; left: 0%; }

.kv-cycle__cta { margin-top: 58px; }

/* =====================================================================
   4/8. SIGNUP CTA (used twice)
   ===================================================================== */
.kv-cta { padding: 90px 0 96px; }
.kv-cta__inner { display: grid; grid-template-columns: 1fr 1.05fr; gap: 54px; align-items: center; }
.kv-cta__title { font-size: clamp(30px, 3.3vw, 42px); font-weight: 700; line-height: 1.14; margin: 0 0 22px; color: var(--ks-navy); }
.kv-cta__desc { font-size: 17px; font-weight: 500; color: var(--ks-navy-soft); line-height: 1.55; margin: 0 0 40px; max-width: 460px; }
.kv-cta__brain { display: flex; align-items: flex-start; gap: 12px; }
.kv-cta__brain img { width: 120px; height: auto; }
.kv-bubble {
  position: relative; background: #f4f5fb; border-radius: 22px; padding: 16px 24px;
  font-weight: 700; font-size: 16px; text-align: center; color: var(--ks-navy);
  box-shadow: 0 10px 26px rgba(72,72,168,.08); margin-top: 16px;
}
.kv-bubble::after {
  content: ""; position: absolute; left: -10px; top: 26px;
  border: 11px solid transparent; border-right-color: #f4f5fb; border-left: 0;
}
.kv-cta__form {
  background: linear-gradient(135deg, #9a8ce4 0%, #7fc0d9 55%, #77d3c7 100%);
  border-radius: 30px; padding: 36px;
}
.kv-form-card {
  background: linear-gradient(150deg, rgba(255,255,255,.6) 0%, rgba(255,255,255,.32) 100%);
  border: 1px solid rgba(255,255,255,.6); border-radius: 22px;
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
  padding: 30px;
}
.kv-google {
  width: 100%; display: inline-flex; align-items: center; justify-content: center; gap: 12px;
  background: #fff; border: 0; border-radius: 12px; padding: 15px;
  font-family: var(--ks-font); font-size: 16px; font-weight: 600; color: var(--ks-navy);
  cursor: pointer; margin-bottom: 22px; box-shadow: 0 6px 16px rgba(72,72,168,.10);
}
.kv-google svg { width: 22px; height: 22px; }
.kv-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.kv-field {
  width: 100%; border: 0; background: rgba(255,255,255,.8); border-radius: 12px;
  padding: 17px 20px; font-family: var(--ks-font); font-size: 16px; color: var(--ks-navy);
  margin-bottom: 16px; box-shadow: inset 0 0 0 1px rgba(255,255,255,.5);
}
.kv-field::placeholder { color: #7a7aa5; }
.kv-field:focus { outline: 2px solid rgba(255,255,255,.9); }
.kv-form-foot { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 4px; }
.kv-form-foot p { margin: 0; font-size: 14px; color: #3f3f80; line-height: 1.4; }
.kv-form-foot p b { color: var(--ks-navy); }
.kv-form-foot .ks-btn { background: linear-gradient(90deg, rgba(154,140,228,.6), rgba(119,211,199,.6)); box-shadow: none; }

/* =====================================================================
   5. DESIGNED BY TEACHERS (bio cards)
   ===================================================================== */
.kv-teachers { padding: 70px 0 100px; }
.kv-teachers__head { max-width: 680px; margin: 0 auto 56px; text-align: center; }
.kv-teachers__head h2 { margin: 0 0 14px; }
.kv-teachers__head p { margin: 0 0 24px; color: var(--ks-navy-soft); font-size: 16px; }
.kv-teachers__grid { display: flex; flex-direction: column; gap: 46px; max-width: 900px; margin: 0 auto; }
.kv-teacher { display: grid; grid-template-columns: 1fr 190px; align-items: center; gap: 34px; }
.kv-teacher__body { position: relative; }
.kv-teacher__arrow { position: absolute; top: -30px; right: -10px; width: 60px; height: auto; color: var(--ks-purple); }
.kv-teacher h3 { margin: 0 0 4px; font-size: 24px; font-weight: 700; color: var(--ks-navy); }
.kv-teacher__role { text-transform: uppercase; letter-spacing: .08em; font-weight: 700; font-size: 12px; color: var(--ks-teal); margin: 0 0 16px; }
.kv-teacher ul { list-style: none; margin: 0; padding: 0; }
.kv-teacher li { display: flex; gap: 10px; margin-bottom: 12px; align-items: flex-start; font-size: 14px; color: var(--ks-navy-soft); line-height: 1.5; }
.kv-teacher li svg { width: 18px; height: 18px; color: var(--ks-purple-deep); flex: none; margin-top: 2px; }
.kv-teacher li b { color: var(--ks-navy); }
.kv-teacher__photo {
  width: 190px; height: 190px; border-radius: 50% 50% 42% 50%; overflow: hidden;
  background: linear-gradient(160deg, #cdeee4, #b9d9f5);
  box-shadow: 0 18px 40px rgba(72,72,168,.16);
}
.kv-teacher__photo img { width: 100%; height: 100%; object-fit: cover; }

/* =====================================================================
   6. WHAT STUDENTS GET
   ===================================================================== */
.kv-get { padding: 40px 0 96px; }
.kv-get__head { display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; margin-bottom: 46px; }
.kv-get__head h2 { margin: 0 0 10px; }
.kv-get__head p { margin: 0; max-width: 620px; font-size: 15px; color: var(--ks-navy-soft); }
.kv-get__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.kv-get__card {
  background: #fff; border-radius: 22px; overflow: hidden;
  box-shadow: 0 16px 40px rgba(72,72,168,.10);
}
.kv-get__banner {
  aspect-ratio: 16/10; display: grid; place-items: center; overflow: hidden;
}
.kv-get__banner img { width: 100%; height: 100%; object-fit: cover; }
.kv-get__banner--ico { display: grid; place-items: center; }
.kv-get__banner--ico svg { width: 60px; height: 60px; color: #fff; }
.kv-get__banner--green { background: linear-gradient(155deg, #a5e6d0, #6fc9a9); }
.kv-get__banner--teal  { background: linear-gradient(155deg, #9ce0d6, #5cb9c4); }
.kv-get__banner--purple{ background: linear-gradient(155deg, #bcaef0, #8f86d6); }
.kv-get__body { padding: 18px 22px 24px; }
.kv-get__body h3 { margin: 0 0 6px; font-size: 17px; font-weight: 700; color: var(--ks-navy); }
.kv-get__body p { margin: 0; font-size: 13.5px; color: var(--ks-navy-soft); line-height: 1.45; }

/* =====================================================================
   7. COMPARISON TABLE
   ===================================================================== */
.kv-compare { padding: 70px 0 90px; background: linear-gradient(120deg, #bfe8df 0%, #d8ecf1 45%, #cdd2f2 100%); }
.kv-compare__panel {
  background: linear-gradient(160deg, rgba(255,255,255,.75) 0%, rgba(255,255,255,.5) 100%);
  border: 1px solid rgba(255,255,255,.7); border-radius: 30px;
  box-shadow: 0 30px 70px rgba(72, 72, 168, .14);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  padding: 20px 44px 30px; overflow-x: auto;
}
.kv-tbl { width: 100%; border-collapse: collapse; min-width: 640px; }
.kv-tbl th, .kv-tbl td { padding: 18px 16px; text-align: center; }
.kv-tbl thead th { text-transform: uppercase; letter-spacing: .06em; font-size: 14px; font-weight: 700; color: var(--ks-navy); padding-top: 28px; padding-bottom: 20px; }
.kv-tbl th:first-child, .kv-tbl td:first-child { text-align: left; width: 30%; }
.kv-tbl__feat { font-size: 16px; font-weight: 700; color: var(--ks-navy); }
.kv-tbl th:not(:first-child), .kv-tbl td:not(:first-child) { border-left: 1px solid rgba(72, 72, 168, .10); }
.kv-tbl .is-ks { background: rgba(255, 255, 255, .38); }
.kv-tbl tbody tr + tr td { border-top: 1px solid rgba(72, 72, 168, .06); }
.kv-yes, .kv-no { display: inline-flex; }
.kv-yes img, .kv-no img { width: 20px; height: 20px; object-fit: contain; }
.kv-partial { font-size: 15px; color: var(--ks-navy-soft); }

/* =====================================================================
   RESPONSIVE
   ===================================================================== */
@media (max-width: 1200px) {
  .kv-hero__inner { grid-template-columns: 1fr; }
  .kv-hero__media { min-height: 0; margin-top: 20px; transform: scale(.9); transform-origin: top center; }
  .kv-video { right: 0; }
  .kv-flash { left: 0; }
  .kv-exam { left: 0; }
  .kv-live { right: 0; }
}
@media (max-width: 1080px) {
  .kv-lose__grid { grid-template-columns: repeat(3, 1fr); }
  .kv-get__grid { grid-template-columns: repeat(2, 1fr); }
  .kv-ring-wrap { grid-template-columns: 1fr; }
  .kv-ring-col { flex-direction: row; flex-wrap: wrap; justify-content: center; gap: 20px; }
  .kv-ring-col--right, .kv-ring-col--left { align-items: center; text-align: center; }
  .kv-ring-col .kv-step { max-width: 300px; }
  .kv-ring { order: -1; margin: 0 auto 30px; }
}
@media (max-width: 900px) {
  .kv-lose__head, .kv-get__head { flex-direction: column; align-items: flex-start; }
  .kv-cta__inner { grid-template-columns: 1fr; gap: 40px; }
  .kv-hero__media { display: none; }
  .kv-teacher, .kv-teacher--reverse { grid-template-columns: 1fr; text-align: center; }
  .kv-teacher__photo { margin: 0 auto; }
  .kv-teacher__arrow { display: none; }
}
@media (max-width: 680px) {
  .kv-lose__grid { grid-template-columns: 1fr; max-width: 360px; margin: 0 auto; }
  .kv-get__grid { grid-template-columns: 1fr; }
  .kv-form-row { grid-template-columns: 1fr; }
  .kv-form-foot { flex-direction: column; align-items: flex-start; }
}