/* ==========================================================================
   WSC — Kid LEADER Hub | single-wsc.css
   Dùng chung bộ biến :root của theme (--color-primary, --color-secondary...)
   Các tông nhạt/đậm còn lại được suy ra bằng color-mix() từ chính các biến đó.
   ========================================================================== */

.wsc-hero,
.wsc-stats,
.wsc-audience,
.wsc-format,
.wsc-subjects,
.wsc-roadmap,
.wsc-achievements,
.wsc-testimonials,
.wsc-cta {
  /* Navy scale — phái sinh từ --color-primary */
  --wsc-navy-900: var(--color-primary);
  --wsc-navy-800: var(--color-primary-dark);
  --wsc-navy-700: color-mix(in srgb, var(--color-primary) 80%, white);
  --wsc-navy-600: var(--color-primary-light);
  --wsc-navy-100: color-mix(in srgb, var(--color-primary) 8%, white);

  /* Green scale — phái sinh từ --color-secondary */
  --wsc-green-700: color-mix(in srgb, var(--color-secondary) 78%, black);
  --wsc-green-600: color-mix(in srgb, var(--color-secondary) 90%, black);
  --wsc-green-500: var(--color-secondary);
  --wsc-green-400: color-mix(in srgb, var(--color-secondary) 85%, white);
  --wsc-green-300: color-mix(in srgb, var(--color-secondary) 55%, white);
  --wsc-green-100: color-mix(in srgb, var(--color-secondary) 12%, white);

  /* Accent */
  --wsc-sun: var(--color-sun);

  /* Ink / text scale — phái sinh từ --color-text */
  --wsc-ink-900: var(--color-text);
  --wsc-ink-700: var(--color-text-light);
  --wsc-ink-500: color-mix(in srgb, var(--color-text) 58%, white);
  --wsc-ink-300: color-mix(in srgb, var(--color-text) 32%, white);
  --wsc-ink-100: color-mix(in srgb, var(--color-text) 10%, white);

  --wsc-paper: #ffffff;
  --wsc-fog: color-mix(in srgb, var(--color-primary) 4%, white);
  --wsc-border-subtle: var(--wsc-ink-100);

  --wsc-radius-s: 8px;
  --wsc-radius-m: 16px;
  --wsc-radius-full: 999px;

  --wsc-shadow-sm: var(--shadow-sm);
  --wsc-shadow-md: var(--shadow-md);
  --wsc-shadow-lg: var(--shadow-lg);

  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  box-sizing: border-box;
}

.wsc-hero *, .wsc-stats *, .wsc-audience *, .wsc-format *,
.wsc-subjects *, .wsc-roadmap *, .wsc-achievements *,
.wsc-testimonials *, .wsc-cta * { box-sizing: border-box; }

.wsc-container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }

/* Section head */
.wsc-section-head { margin: 0 0 40px; }
.wsc-section-head h2 {
  margin: 0 0 10px;
  font-family: var(--font-family);
  font-weight: 800;
  font-size: clamp(1.875rem, 3vw, 2.25rem);
  line-height: 1.15;
  color: var(--wsc-navy-900);
}
.wsc-section-head p { margin: 0; font-size: 1.0625rem; line-height: var(--line-height-base); color: var(--wsc-ink-500); }
.wsc-section-head--center {  margin: 0 auto 40px; text-align: center; }
.wsc-section-head--dark h2, .wsc-section-head--dark p { color: var(--wsc-paper); }
.wsc-section-head--dark p { color: rgba(255, 255, 255, 0.7); }

.wsc-badge {
  display: inline-block;
  margin-bottom: 12px;
  padding: 7px 16px;
  border-radius: var(--wsc-radius-full);
  background: var(--wsc-green-100);
  color: var(--wsc-green-700);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.wsc-badge--outline {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: var(--wsc-green-300);
}

.wsc-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 30px;
  border-radius: var(--wsc-radius-s);
  font-weight: 600;
  font-size: 1.0625rem;
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}
.wsc-btn--primary { background: var(--wsc-green-500); color: var(--wsc-navy-900); }
.wsc-btn--primary:hover { background: var(--wsc-green-400); color: var(--wsc-navy-900); }
.wsc-btn--outline { background: transparent; border: 1px solid rgba(255, 255, 255, 0.35); color: var(--wsc-paper); }
.wsc-btn--outline:hover { border-color: var(--wsc-green-300); color: var(--wsc-green-300); }
.wsc-btn--lg { padding: 17px 38px; font-size: 1.125rem; }

/* ---------- Hero ---------- */
.wsc-hero {
  position: relative;
  background-color: var(--wsc-navy-900);
  background-size: cover;
  background-position: center;
  color: var(--wsc-paper);
  overflow: hidden;
}
.wsc-hero__overlay {
   position: absolute; inset: 0;
  background: black;
  opacity: 0.65;
}
.wsc-hero__inner { position: relative; padding: 72px 24px 80px; display: flex; flex-direction: column; align-items: flex-start; gap: 22px; }
.wsc-hero__title { margin: 0; font-family: var(--font-family); font-weight: 800; font-size: clamp(2rem, 4.2vw, 4rem); line-height: 1.08; color: var(--wsc-paper); }
.wsc-hero__title span { color: var(--wsc-green-400); }
.wsc-hero__desc { margin: 0; max-width: 34em; font-size: 1.125rem; line-height: var(--line-height-base); color: rgba(255, 255, 255, 0.78); }
.wsc-hero__meta {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, auto));
  gap: 14px 36px; padding: 18px 0 4px; border-top: 1px solid rgba(255, 255, 255, 0.14); width: 100%;
}
.wsc-hero__meta-item { display: flex; flex-direction: column; gap: 4px; }
.wsc-hero__meta-label {
    font-size: 16px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-secondary);
    font-weight: 600;
}
.wsc-hero__meta-value { font-family: var(--font-family); font-weight: 700; font-size: 1.25rem; color: var(--wsc-paper); }
.wsc-hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 6px; }
.wsc-hero__gallery { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-top: 20px; width: 100%; max-width: 760px; }
.wsc-hero__thumb {
  height: 110px; padding: 0; border-radius: 10px; background-size: cover; background-position: center;
  background-color: rgba(255, 255, 255, 0.08); border: 2px solid transparent; cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}
.wsc-hero__thumb:hover { transform: translateY(-3px); box-shadow: var(--wsc-shadow-lg); }
.wsc-hero__thumb.is-active { border-color: var(--wsc-green-400); box-shadow: var(--wsc-shadow-lg); }

/* ---------- Stats ---------- */
.wsc-stats { background: var(--wsc-fog); border-bottom: 1px solid var(--wsc-border-subtle); padding: 72px 0; }
.wsc-stats__grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 28px 0; padding: 40px 24px; border-radius: 24px; border: 1px solid var(--wsc-border-subtle);
  box-shadow: var(--wsc-shadow-sm); background: var(--wsc-green-100);
}
.wsc-stats__item {
  display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 0 20px; text-align: center;
  border-right: 1px solid var(--wsc-border-subtle);
}
.wsc-stats__item:last-child { border-right: none; }
.wsc-stats__num { font-family: var(--font-family); font-weight: 800; font-size: clamp(2.25rem, 3.4vw, 3.25rem); line-height: 1; color: var(--wsc-navy-900); }
.wsc-stats__label { font-size: 0.9375rem; line-height: 1.5; color: var(--wsc-ink-500); max-width: 14em; }

/* ---------- Audience ---------- */
.wsc-audience { padding: 88px 24px 24px; }
.wsc-audience__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 48px; align-items: start; }
.wsc-audience__media {
  position: relative; min-width: 0; border-radius: var(--wsc-radius-m); overflow: hidden; height: 500px;
  background-size: cover; background-position: center; background-color: var(--wsc-navy-800);
}
.wsc-audience__media-caption {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 28px 24px 22px;
  background: linear-gradient(180deg, transparent, color-mix(in srgb, var(--color-primary) 90%, black));
}
.wsc-audience__media-title { font-family: var(--font-family); font-weight: 800; font-size: 1.375rem; color: var(--wsc-paper); }
.wsc-audience__media-sub { margin-top: 4px; font-size: 0.9375rem; color: rgba(255, 255, 255, 0.8); }
.wsc-audience__row { display: grid; grid-template-columns: 88px 1fr; gap: 20px; padding: 22px 0; border-bottom: 1px solid var(--wsc-border-subtle); }
.wsc-audience__row:last-child { border-bottom: none; }
.wsc-audience__row-left { display: flex; flex-direction: column; gap: 4px; }
.wsc-audience__num { font-family: var(--font-family); font-weight: 800; font-size: 1.5rem; color: var(--wsc-ink-300); line-height: 1.2; }
.wsc-audience__tag { font-size: 0.8125rem; font-weight: 600; line-height: 1.3; color: var(--wsc-green-600); }
.wsc-audience__row-right h3 { margin: 0 0 6px; font-family: var(--font-family); font-weight: 700; font-size: 1.1875rem; color: var(--wsc-navy-900); }
.wsc-audience__row-right p { margin: 0; font-size: 1rem; line-height: var(--line-height-base); color: var(--wsc-ink-500); }

/* ---------- Tabs (shared by format + roadmap) ---------- */
.wsc-tabs { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 20px; }
.wsc-tab {
  padding: 10px 18px; border-radius: var(--wsc-radius-full); border: 1px solid var(--wsc-border-subtle);
  font-family: var(--font-family); font-weight: 600; font-size: 0.9375rem; cursor: pointer;
  background: var(--wsc-paper); color: var(--wsc-ink-700);
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}
.wsc-tab.is-active { background: var(--wsc-navy-900); color: var(--wsc-paper); border-color: var(--wsc-navy-900); }
.wsc-icon-btn {
  display: inline-flex; align-items: center; justify-content: center; width: 46px; height: 46px;
  border-radius: var(--wsc-radius-s); border: 1px solid var(--color-secondary); background: transparent;
  color: var(--color-secondary); font-size: 1.125rem; cursor: pointer;
  transition: border-color var(--transition-fast), color var(--transition-fast), background var(--transition-fast);
}
.wsc-icon-btn:hover { border-color: var(--wsc-green-300); color: var(--wsc-green-300); }
.wsc-icon-btn--solid { border-color: var(--wsc-green-500); background: var(--wsc-green-500); color: var(--wsc-navy-900); }
.wsc-icon-btn--solid:hover { background: var(--wsc-green-400); color: var(--wsc-navy-900); }

/* ---------- Format ---------- */
.wsc-format { padding: 80px 24px 24px; }
.wsc-format__card {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  border-radius: var(--wsc-radius-m); overflow: hidden; background: var(--color-primary); color: var(--wsc-paper); min-height: 320px;
}
.wsc-format__main { padding: 44px; display: flex; flex-direction: column; gap: 16px; }
.wsc-eyebrow { font-size: 0.8125rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--wsc-green-300); }
.wsc-eyebrow--dark { color: var(--wsc-navy-900); }
.wsc-format__name { margin: 0; font-family: var(--font-family); font-weight: 800; font-size: 2.25rem; line-height: 1.1; color: var(--wsc-paper); }
.wsc-format__desc { margin: 0; font-size: 1.0625rem; line-height: var(--line-height-base); color: rgba(255, 255, 255, 0.78); }
.wsc-format__note { margin: 0; font-size: 1rem; line-height: var(--line-height-base); color: var(--wsc-green-300); }
.wsc-format__nav { display: flex; gap: 12px; margin-top: auto; padding-top: 24px; }
.wsc-format__side { padding: 44px; display: flex; flex-direction: column; justify-content: center; gap: 24px; background: var(--wsc-navy-100); }
.wsc-format__sessions { display: flex; align-items: baseline; gap: 10px; font-family: var(--font-family); font-weight: 800; line-height: 1; }
.wsc-format__sessions-num { font-size: 4rem; color: var(--wsc-navy-600); }
.wsc-format__sessions-unit { font-size: 1.75rem; color: var(--wsc-navy-600); }
.wsc-format__sessions-caption { margin-top: 6px; font-size: 1rem; color: var(--wsc-navy-900); }
.wsc-divider { height: 1px; background: var(--wsc-navy-600); }
.wsc-format__format-label { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--wsc-navy-900); }
.wsc-format__format-value { margin-top: 6px; font-size: 1rem; line-height: 1.55; color: var(--wsc-navy-900); }

/* ---------- Subjects ---------- */
.wsc-subjects { margin: 80px 0 0; background: var(--wsc-navy-900); color: var(--wsc-paper); padding: 72px 0; }
.wsc-subjects__grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.wsc-subjects__card {
  display: flex; flex-direction: column; min-height: 260px; padding: 28px 26px 0;
  border-radius: 26px; background: var(--wsc-paper); border: 1px solid var(--wsc-border-subtle);
  box-shadow: var(--wsc-shadow-sm); transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.wsc-subjects__card:hover { transform: translateY(-4px); box-shadow: var(--wsc-shadow-md); }
.wsc-subjects__card h3 { margin: 0 0 14px; font-family: var(--font-family); font-weight: 800; font-size: 1.25rem; letter-spacing: 0.02em; text-transform: uppercase; color: var(--wsc-navy-900); }
.wsc-subjects__card p { margin: 0; font-size: 1rem; line-height: var(--line-height-base); color: var(--wsc-ink-500); }
.wsc-subjects__icon {
  margin-top: auto; margin-bottom: 24px; width: 88px; height: 88px; border-radius: 24px;
  align-self: flex-end; transform: rotate(-6deg);
  background: linear-gradient(150deg, var(--wsc-green-300), var(--wsc-green-500));
  box-shadow: var(--wsc-shadow-md);
  display: flex; align-items: center; justify-content: center;
}
.wsc-subjects__icon i { font-size: 34px; color: var(--wsc-navy-900); }

/* ---------- Roadmap ---------- */
.wsc-roadmap { padding: 88px 24px 24px; }
.wsc-roadmap__card {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 28px;
  padding: 28px 30px; border-radius: var(--wsc-radius-m); background: var(--wsc-paper);
  border: 1px solid var(--wsc-border-subtle); box-shadow: var(--wsc-shadow-sm); align-items: stretch;
}
.wsc-roadmap__card.is-dark { background: var(--wsc-navy-900); color: var(--wsc-paper); }
.wsc-roadmap__card.is-dark h3, .wsc-roadmap__card.is-dark h4 { color: var(--wsc-paper); }
.wsc-roadmap__card.is-dark p, .wsc-roadmap__card.is-dark li { color: rgba(255, 255, 255, 0.78); }
.wsc-pill { display: inline-block; padding: 5px 11px; border-radius: var(--wsc-radius-full); background: var(--wsc-navy-100); color: var(--wsc-navy-700); font-size: 0.8125rem; font-weight: 600; }
.wsc-roadmap__intro h3 { margin: 12px 0 8px; font-family: var(--font-family); font-weight: 800; font-size: 1.3125rem; line-height: 1.25; color: var(--wsc-navy-900); }
.wsc-roadmap__intro p { margin: 0; font-size: 0.9375rem; line-height: 1.55; color: var(--wsc-ink-500); }
.wsc-roadmap__col h4 { margin: 0 0 10px; font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--wsc-green-600); }
.wsc-roadmap__col ul { margin: 0; padding-left: 18px; display: flex; flex-direction: column; gap: 6px; font-size: 0.9375rem; line-height: 1.5; color: var(--wsc-ink-500); }

/* ---------- Achievements ---------- */
.wsc-achievements { padding: 80px 24px 24px; }
.wsc-achievements__grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); gap: 24px; align-items: start; }
.wsc-achievements__media {
  margin: 0; padding: 16px; border-radius: 14px; background: var(--wsc-paper); border: 1px solid var(--wsc-border-subtle);
  box-shadow: var(--wsc-shadow-sm); display: flex; flex-direction: column; gap: 12px;
}
.wsc-achievements__media img { width: 100%; height: auto; border-radius: 12px; display: block; }
.wsc-achievements__media figcaption { font-size: 1rem; color: var(--wsc-ink-500); font-style: italic; }
.wsc-achievements__list { display: flex; flex-direction: column; gap: 16px; }
.wsc-achievements__row {
  display: grid; grid-template-columns: 56px 1fr; align-items: center; gap: 20px; padding: 24px 26px;
  border-radius: var(--wsc-radius-m); background: var(--wsc-paper); border: 1px solid var(--wsc-border-subtle);
  box-shadow: var(--wsc-shadow-sm); transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.wsc-achievements__row:hover { transform: translateY(-4px); box-shadow: var(--wsc-shadow-md); }
.wsc-achievements__num { font-family: var(--font-family); font-weight: 800; font-size: 2rem; line-height: 1; color: var(--wsc-green-600); }
.wsc-achievements__label { font-size: 1rem; line-height: 1.5; color: var(--wsc-ink-700); }

/* ---------- Testimonials ---------- */
.wsc-testimonials { background: var(--wsc-paper); padding: 88px 0; }
.wsc-testimonials__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.wsc-testimonials__card {
  display: flex; flex-direction: column; gap: 18px; padding: 26px; border-radius: 18px;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.wsc-testimonials__card:hover { transform: translateY(-4px); box-shadow: var(--wsc-shadow-md); }
.wsc-testimonials__card.tint-1 { background: var(--wsc-green-100); }
.wsc-testimonials__card.tint-2 { background: var(--wsc-navy-100); }
.wsc-testimonials__card.tint-3 { background: var(--wsc-fog); }
.wsc-testimonials__card p { margin: 0; font-size: 1rem; line-height: var(--line-height-base); font-style: italic; color: var(--wsc-ink-900); }
.wsc-testimonials__author { display: flex; align-items: center; gap: 12px; margin-top: auto; }
.wsc-testimonials__initial {
  display: inline-flex; align-items: center; justify-content: center; width: 42px; height: 42px;
  border-radius: var(--wsc-radius-full); background: rgba(255, 255, 255, 0.75); color: var(--wsc-navy-800);
  font-family: var(--font-family); font-weight: 800;
}
.wsc-testimonials__author-info { display: flex; flex-direction: column; }
.wsc-testimonials__author-info strong { font-family: var(--font-family); font-size: 1.0625rem; color: var(--wsc-navy-900); }
.wsc-testimonials__author-info span { font-size: 0.875rem; color: var(--wsc-ink-500); }
.wsc-testimonials__nav { display: flex; align-items: center; justify-content: center; gap: 14px; margin-top: 36px; }
.wsc-round-btn {
  display: inline-flex; align-items: center; justify-content: center; width: 48px; height: 48px;
  border-radius: var(--wsc-radius-full); border: 1px solid var(--wsc-border-subtle); background: var(--wsc-paper);
  color: var(--wsc-navy-800); font-size: 1.125rem; cursor: pointer;
  transition: border-color var(--transition-fast), color var(--transition-fast), background var(--transition-fast);
}
.wsc-round-btn:hover { border-color: var(--wsc-green-500); color: var(--wsc-green-600); }
.wsc-round-btn--solid { border-color: var(--wsc-navy-800); background: var(--wsc-navy-800); color: var(--wsc-paper); }
.wsc-round-btn--solid:hover { background: var(--wsc-navy-700); }

/* ---------- CTA (đã bỏ form/countdown: chỉ title + description + nút) ---------- */
.wsc-cta {
  position: relative; background-color: var(--wsc-navy-900); background-size: cover; background-position: center;
  border-top: 1px solid var(--wsc-border-subtle); overflow: hidden;
}
.wsc-cta__overlay { position: absolute; inset: 0; background: linear-gradient(color-mix(in srgb, var(--color-primary) 55%, black), color-mix(in srgb, var(--color-primary) 75%, black)); }
.wsc-cta__inner {
  position: relative; padding: 96px 24px; max-width: 720px; margin: 0 auto; text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: 18px;
}
.wsc-cta__inner h2 { margin: 0; font-family: var(--font-family); font-weight: 800; font-size: clamp(1.875rem, 3.4vw, 2.25rem); color: var(--wsc-green-300); }
.wsc-cta__inner p { margin: 0; font-size: 1.0625rem; line-height: var(--line-height-base); color: rgba(255, 255, 255, 0.82); }
.wsc-cta__inner .wsc-btn { margin-top: 6px; }

/* ---------- Responsive ---------- */
/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .wsc-subjects__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .wsc-achievements__grid { grid-template-columns: 1fr; }
  .wsc-format__main, .wsc-format__side { padding: 32px; }
  .wsc-audience__media { height: 360px; }
  .wsc-hero__inner { padding: 56px 24px 64px; }
  .wsc-cta__inner { padding: 64px 24px; }
}

@media (max-width: 640px) {
  .wsc-subjects__grid { grid-template-columns: 1fr; }
  .wsc-stats__item { border-right: none !important; }
  .wsc-hero__gallery { grid-template-columns: repeat(2, minmax(0, 1fr)); max-width: 100%; }
  .wsc-hero__meta { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .wsc-format__sessions-num { font-size: 2.75rem; }
  .wsc-format__sessions-unit { font-size: 1.375rem; }
  .wsc-format__main, .wsc-format__side { padding: 24px; }
  .wsc-format__name { font-size: 1.625rem; }
  .wsc-roadmap__card { padding: 22px 20px; }
  .wsc-audience__media { height: 280px; }
  .wsc-achievements__media { padding: 10px; }
  .wsc-testimonials__nav { gap: 10px; }
  .wsc-cta__inner { padding: 48px 20px; gap: 14px; }
  .wsc-btn { padding: 13px 22px; font-size: 1rem; }
  .wsc-btn--lg { padding: 15px 28px; }
}

@media (max-width: 400px) {
  .wsc-hero__gallery { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .wsc-hero__meta { grid-template-columns: 1fr; gap: 12px; }
  .wsc-stats__grid { padding: 24px 16px; }
}