/* =============================================
   AI伴走型パーソナル指導 — style.css
   Base: Blue & White
   ============================================= */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue-900:   #1e3a8a;
  --blue-700:   #1d4ed8;
  --blue-600:   #2563eb;
  --blue-500:   #3b82f6;
  --blue-400:   #60a5fa;
  --blue-200:   #bfdbfe;
  --blue-100:   #dbeafe;
  --blue-50:    #eff6ff;
  --white:      #ffffff;
  --gray-900:   #0f172a;
  --gray-800:   #1e293b;
  --gray-700:   #334155;
  --gray-600:   #475569;
  --gray-500:   #64748b;
  --gray-300:   #cbd5e1;
  --gray-100:   #f1f5f9;
  --gray-50:    #f8fafc;
  --line:       #06c755;
  --upgrade:    #0d47a1;

  --shadow-sm:   0 1px 3px rgba(0,0,0,.08);
  --shadow-md:   0 4px 20px rgba(0,0,0,.08);
  --shadow-lg:   0 10px 48px rgba(0,0,0,.12);
  --shadow-blue: 0 8px 32px rgba(37,99,235,.28);

  --radius:    12px;
  --radius-lg: 20px;
  --trans:     all .28s ease;
  --font:      'Noto Sans JP', sans-serif;
}

html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font); background: var(--white); color: var(--gray-800); line-height: 1.7; overflow-x: hidden; }
em   { font-style: normal; }

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.text-blue  { color: var(--blue-600); }

/* === BUTTONS === */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 30px; border-radius: 8px; font-size: .95rem; font-weight: 700;
  text-decoration: none; cursor: pointer; border: 2px solid transparent;
  transition: var(--trans); white-space: nowrap; font-family: var(--font);
}
.btn--primary      { background: var(--blue-600); color: var(--white); border-color: var(--blue-600); }
.btn--primary:hover{ background: var(--blue-700); box-shadow: var(--shadow-blue); transform: translateY(-2px); }
.btn--outline-blue { background: transparent; color: var(--blue-600); border-color: var(--blue-600); }
.btn--outline-blue:hover { background: var(--blue-50); transform: translateY(-2px); }
.btn--white        { background: var(--white); color: var(--blue-700); border-color: var(--white); }
.btn--white:hover  { background: var(--blue-50); transform: translateY(-2px); }
.btn--outline-white{ background: transparent; color: var(--white); border-color: rgba(255,255,255,.6); }
.btn--outline-white:hover{ border-color: var(--white); background: rgba(255,255,255,.1); }
.btn--lg    { padding: 16px 42px; font-size: 1.05rem; }
.btn--full  { width: 100%; }
.btn-icon   { width: 20px; height: 20px; flex-shrink: 0; }

/* === HEADER === */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 900;
  background: rgba(255,255,255,.92); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--gray-100); transition: var(--trans);
}
.header.scrolled { background: rgba(255,255,255,.99); box-shadow: var(--shadow-sm); }

.header__inner {
  display: flex; align-items: center; gap: 20px;
  max-width: 1120px; margin: 0 auto; padding: 0 24px; height: 68px;
}
.header__logo {
  display: flex; align-items: center; gap: 10px;
  font-size: .95rem; font-weight: 900; color: var(--gray-900);
  text-decoration: none; white-space: nowrap; letter-spacing: -.02em;
}
.logo-mark {
  width: 34px; height: 34px; border-radius: 8px;
  background: var(--blue-600); color: var(--white);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; font-weight: 900; flex-shrink: 0;
}
.header__nav { display: flex; align-items: center; gap: 24px; margin-left: auto; }
.header__nav a { color: var(--gray-500); text-decoration: none; font-size: .87rem; font-weight: 500; transition: var(--trans); }
.header__nav a:hover { color: var(--blue-600); }
.header__nav a.nav-active { color: var(--blue-600); font-weight: 700; }
.header__cta { margin-left: 12px; padding: 10px 22px; font-size: .87rem; }

.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; margin-left: auto; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--gray-700); border-radius: 2px; transition: var(--trans); }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* === HERO === */
.hero {
  position: relative; min-height: 100vh;
  display: flex; flex-direction: column; overflow: hidden; padding-top: 68px;
}
.hero__bg { position: absolute; inset: 0; background: linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 60%, #0f172a 100%); }
.hero__bg-img { width: 100%; height: 100%; object-fit: cover; object-position: center; }
.hero__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(130deg, rgba(30,58,138,.88) 0%, rgba(37,99,235,.75) 50%, rgba(15,23,42,.8) 100%);
}

.hero__body {
  position: relative; z-index: 1; flex: 1;
  display: flex; align-items: center;
  padding-top: 6rem; padding-bottom: 5rem;
}
.hero__text { max-width: 720px; }

.hero__badge {
  display: inline-block; padding: 5px 16px;
  background: rgba(255,255,255,.15); color: var(--white);
  font-size: .82rem; font-weight: 700; border-radius: 20px;
  margin-bottom: 1.4rem; letter-spacing: .08em;
  border: 1px solid rgba(255,255,255,.25);
}
.hero__title {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 900; color: var(--white);
  line-height: 1.18; margin-bottom: 1.6rem; letter-spacing: -.04em;
}
.hero__title em { color: #93c5fd; font-style: normal; }

.hero__desc {
  font-size: 1.02rem; color: rgba(255,255,255,.85);
  line-height: 2; margin-bottom: 2.4rem;
}
.hero__desc strong { color: #93c5fd; }

.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 1.2rem; }
.hero__note { font-size: .82rem; color: rgba(255,255,255,.6); }

.hero__scroll-hint { position: relative; z-index: 1; text-align: center; padding-bottom: 2rem; }
.hero__scroll-hint span {
  display: inline-block; width: 24px; height: 38px;
  border: 2px solid rgba(255,255,255,.4); border-radius: 12px; position: relative;
}
.hero__scroll-hint span::after {
  content: ''; position: absolute; top: 6px; left: 50%; transform: translateX(-50%);
  width: 4px; height: 8px; background: rgba(255,255,255,.7); border-radius: 2px;
  animation: scrollDown 1.6s ease-in-out infinite;
}
@keyframes scrollDown { 0%{opacity:1;top:6px;} 100%{opacity:0;top:20px;} }

/* === STATS BAR === */
.stats-bar { background: var(--blue-600); }
.stats-bar__inner {
  display: flex; justify-content: space-around; align-items: center;
  flex-wrap: wrap; gap: 1rem; padding: 1.8rem 24px;
}
.stat-item  { text-align: center; }
.stat-num   { display: block; font-size: 1.1rem; font-weight: 700; color: var(--white); line-height: 1.3; }
.stat-num em{ font-style: normal; font-size: 1.6rem; }
.stat-label { display: block; font-size: .78rem; color: rgba(255,255,255,.75); margin-top: 2px; }
.stat-divider { width: 1px; height: 36px; background: rgba(255,255,255,.2); }

/* === SECTIONS === */
.section       { padding: 7rem 0; }
.problems      { background: var(--white); }
.about         { background: var(--gray-50); }
.instructor    { background: var(--white); }
.curriculum    { background: var(--blue-50); }
.pricing       { background: var(--gray-50); }
.comparison    { background: var(--white); }
.faq           { background: var(--gray-50); }
.contact       { background: var(--blue-600); padding: 6rem 0; }

.section__header { text-align: center; margin-bottom: 3.5rem; }
.section__label  { display: inline-block; font-size: .78rem; font-weight: 700; letter-spacing: .2em; color: var(--blue-600); margin-bottom: .75rem; text-transform: uppercase; }
.section__title  { font-size: clamp(1.7rem, 3.5vw, 2.6rem); font-weight: 900; line-height: 1.3; color: var(--gray-900); letter-spacing: -.03em; }
.section__sub    { font-size: .95rem; color: var(--gray-500); margin-top: .8rem; }

/* === PROBLEMS === */
.problems__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.4rem; }
.problem-card {
  background: var(--white); border: 1.5px solid var(--gray-100);
  border-radius: var(--radius); padding: 2rem;
  box-shadow: var(--shadow-sm); transition: var(--trans);
}
.problem-card:hover { border-color: var(--blue-200); box-shadow: var(--shadow-md); transform: translateY(-4px); }
.problem-card__icon { font-size: 2.6rem; margin-bottom: 1rem; }
.problem-card h3    { font-size: 1.05rem; font-weight: 700; color: var(--gray-900); margin-bottom: .6rem; line-height: 1.4; }
.problem-card p     { font-size: .9rem; color: var(--gray-500); line-height: 1.75; }

/* === ABOUT === */
.about__concept {
  display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: 1rem;
  align-items: center; margin-bottom: 4rem;
}
.concept-card {
  background: var(--white); border: 1.5px solid var(--gray-100);
  border-radius: var(--radius); padding: 2rem 1.5rem;
  text-align: center; box-shadow: var(--shadow-sm); transition: var(--trans);
}
.concept-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.concept-card--mid  { border-color: var(--blue-300, #93c5fd); background: var(--blue-50); }
.concept-card--last { border-color: var(--blue-500); box-shadow: var(--shadow-blue); }
.concept-card__icon { font-size: 2.8rem; margin-bottom: .8rem; }
.concept-card h3    { font-size: 1.3rem; font-weight: 900; color: var(--gray-900); margin-bottom: .6rem; }
.concept-card p     { font-size: .88rem; color: var(--gray-500); line-height: 1.7; }
.concept-arrow      { font-size: 2rem; color: var(--blue-400); text-align: center; opacity: .7; }

.about__flow-title {
  text-align: center; font-size: 1.3rem; font-weight: 700;
  color: var(--gray-800); margin-bottom: 2rem;
}
.flow-steps {
  display: flex; align-items: flex-start; justify-content: center;
}
.flow-step { text-align: center; flex: 1; max-width: 220px; padding: 1.5rem 1rem; }
.flow-step__num {
  font-size: 2.8rem; font-weight: 900; line-height: 1; margin-bottom: .5rem;
  color: rgba(37,99,235,.15); letter-spacing: -.04em;
}
.flow-step__icon { font-size: 2.4rem; margin-bottom: .8rem; }
.flow-step h4 { font-size: 1rem; font-weight: 700; color: var(--gray-900); margin-bottom: .5rem; }
.flow-step p  { font-size: .85rem; color: var(--gray-500); line-height: 1.65; }
.flow-arrow { font-size: 2rem; color: var(--blue-400); align-self: center; padding: 0 .5rem; margin-top: -28px; opacity: .6; flex-shrink: 0; }

/* === INSTRUCTOR === */
.instructor__body {
  display: grid; grid-template-columns: 300px 1fr;
  gap: 4rem; align-items: start;
}
.instructor__photo-wrap {
  border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-lg); flex-shrink: 0;
  border: 4px solid var(--blue-100);
}
.instructor__photo { width: 100%; display: block; object-fit: cover; }

.instructor__name-en { font-size: .78rem; color: var(--blue-600); font-weight: 700; letter-spacing: .14em; text-transform: uppercase; margin-bottom: .3rem; }
.instructor__name    { font-size: 1.5rem; font-weight: 900; color: var(--gray-900); margin-bottom: 1rem; }
.instructor__tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 1.6rem; }
.itag {
  padding: 4px 14px; background: var(--blue-100); color: var(--blue-700);
  border-radius: 20px; font-size: .8rem; font-weight: 700;
}
.instructor__msg {
  font-size: .95rem; color: var(--gray-600); line-height: 2;
  margin-bottom: 2rem;
}
.instructor__msg strong { color: var(--blue-700); }

/* === CURRICULUM === */
.curriculum__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.curriculum-col { background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow-sm); overflow: hidden; }
.curriculum-col--upgrade { border: 2px solid var(--blue-500); box-shadow: var(--shadow-blue); }

.curriculum-col__header { padding: 1.8rem 2rem; }
.curriculum-col__header--basic   { background: var(--gray-50); border-bottom: 1px solid var(--gray-100); }
.curriculum-col__header--upgrade { background: var(--blue-700); }
.curriculum-col__header--upgrade h3 { color: var(--white); }
.curriculum-col__header--upgrade p  { color: rgba(255,255,255,.75); }

.curriculum-plan-label {
  display: inline-block; padding: 3px 12px; border-radius: 20px;
  font-size: .78rem; font-weight: 700; margin-bottom: .6rem;
}
.curriculum-col__header--basic   .curriculum-plan-label { background: var(--blue-100); color: var(--blue-700); }
.curriculum-col__header--upgrade .curriculum-plan-label { background: rgba(255,255,255,.2); color: var(--white); }
.curriculum-col__header h3 { font-size: 1.15rem; font-weight: 700; color: var(--gray-900); margin-bottom: .4rem; }
.curriculum-col__header p  { font-size: .85rem; color: var(--gray-500); }

.curriculum-col__body { padding: 1.5rem 2rem 2rem; display: flex; flex-direction: column; gap: 1.4rem; }
.curriculum-item { display: flex; gap: 1rem; align-items: flex-start; }
.ci-num {
  display: inline-block; padding: 3px 10px;
  background: var(--blue-100); color: var(--blue-700);
  border-radius: 5px; font-size: .75rem; font-weight: 700;
  white-space: nowrap; flex-shrink: 0; margin-top: 2px;
}
.ci-num--up { background: var(--blue-600); color: var(--white); }
.curriculum-item strong { display: block; font-size: .95rem; font-weight: 700; color: var(--gray-800); margin-bottom: .3rem; }
.curriculum-item p { font-size: .85rem; color: var(--gray-500); line-height: 1.65; }

/* === PRICING === */
.pricing__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.6rem; max-width: 820px; margin: 0 auto; }
.pricing-card {
  background: var(--white); border: 1.5px solid var(--gray-100);
  border-radius: var(--radius-lg); padding: 2.5rem 2.2rem;
  box-shadow: var(--shadow-sm); position: relative; transition: var(--trans);
}
.pricing-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.pricing-card--featured { border-color: var(--blue-500); box-shadow: var(--shadow-blue); background: linear-gradient(160deg, var(--blue-50), var(--white)); }
.pricing-card--featured:hover { box-shadow: 0 12px 48px rgba(37,99,235,.32); }
.pricing-card__badge { position: absolute; top: -14px; left: 50%; transform: translateX(-50%); background: var(--blue-600); color: var(--white); font-size: .8rem; font-weight: 700; padding: 4px 22px; border-radius: 20px; white-space: nowrap; }
.pricing-card__plan   { font-size: .82rem; font-weight: 700; color: var(--blue-600); letter-spacing: .04em; margin-bottom: .4rem; }
.pricing-card__name   { font-size: 1.2rem; font-weight: 700; color: var(--gray-900); margin-bottom: .4rem; line-height: 1.4; }
.pricing-card__target { font-size: .82rem; color: var(--gray-500); margin-bottom: 1.4rem; }
.pricing-card__price  { display: flex; align-items: baseline; gap: 2px; margin-bottom: 1.2rem; }
.price-currency { font-size: 1.25rem; font-weight: 700; color: var(--blue-600); }
.price-amount   { font-size: 3.2rem; font-weight: 900; color: var(--blue-600); line-height: 1; }
.price-period   { font-size: .9rem; color: var(--gray-500); }
.pricing-card__list { list-style: none; display: flex; flex-direction: column; gap: .7rem; margin-bottom: 2rem; padding-top: 1rem; border-top: 1px solid var(--gray-100); }
.pricing-card__list li { font-size: .9rem; color: var(--gray-700); }
.pricing__note { text-align: center; font-size: .83rem; color: var(--gray-500); margin-top: 1.5rem; }

/* === COMPARISON === */
.comparison__wrapper { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md); }
.comparison__table   { width: 100%; border-collapse: collapse; }
.comparison__table th, .comparison__table td { padding: 1rem 1.4rem; text-align: left; border-bottom: 1px solid var(--gray-100); font-size: .9rem; }
.comparison__table thead th { background: var(--gray-800); font-weight: 700; font-size: .9rem; padding: 1.2rem 1.4rem; color: var(--white); }
.comparison__table tbody tr { background: var(--white); }
.comparison__table tbody tr:nth-child(even) { background: var(--gray-50); }
.comparison__table tbody tr:hover { background: var(--blue-50); }
.comparison__table td:first-child { font-weight: 600; color: var(--gray-700); }
.col-item  { color: var(--gray-400, #94a3b8) !important; }
.col-bad   { color: #dc2626; }
.col-bad2  { color: #d97706; }
.col-good  { color: #16a34a; font-weight: 600; }
th.col-bad { color: #fca5a5; }
th.col-bad2{ color: #fde68a; }
th.col-good{ color: #86efac; }

/* === FAQ === */
.faq__list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: .75rem; }
.faq-item  { background: var(--white); border: 1.5px solid var(--gray-100); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); transition: border-color .28s ease; }
.faq-item.open { border-color: var(--blue-400); }
.faq-item__q {
  width: 100%; background: none; border: none; padding: 1.2rem 1.6rem;
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
  cursor: pointer; font-size: .95rem; font-weight: 600; color: var(--gray-800);
  text-align: left; font-family: var(--font); transition: var(--trans);
}
.faq-item__q:hover { color: var(--blue-600); }
.faq-icon  { font-size: 1.5rem; color: var(--blue-500); flex-shrink: 0; transition: transform .28s ease; line-height: 1; }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-item__a { max-height: 0; overflow: hidden; transition: max-height .36s ease; }
.faq-item.open .faq-item__a { max-height: 260px; }
.faq-item__a p { padding: 0 1.6rem 1.3rem; font-size: .9rem; color: var(--gray-500); line-height: 1.85; }

/* === CONTACT === */
.contact { background: var(--gray-50); }

.contact__header { text-align: center; margin-bottom: 3rem; }
.contact__label  { display: inline-block; font-size: .82rem; color: var(--blue-600); font-weight: 700; letter-spacing: .16em; margin-bottom: 1rem; }
.contact__title  { font-size: clamp(1.9rem, 3.5vw, 2.8rem); font-weight: 900; color: var(--gray-900); margin-bottom: 1rem; line-height: 1.3; letter-spacing: -.03em; }
.contact__title em { color: var(--blue-600); font-style: normal; }
.contact__desc   { font-size: .95rem; color: var(--gray-500); line-height: 1.85; }

.contact__body { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: start; }

.contact-block__label { display: flex; align-items: center; gap: 10px; margin-bottom: .6rem; }
.contact-block__icon  { font-size: 1.5rem; }
.contact-block__label h3 { font-size: 1.15rem; font-weight: 700; color: var(--gray-900); }
.contact-block__desc  { font-size: .88rem; color: var(--gray-500); margin-bottom: 1.2rem; }

/* Calendar */
.contact__calendar {
  background: var(--white); border: 1.5px solid var(--gray-100);
  border-radius: var(--radius-lg); padding: 1.8rem;
  box-shadow: var(--shadow-sm);
}
.calendar-embed { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--gray-100); }
.calendar-fallback-btn { display: none; }
.calendar-note { font-size: .78rem; color: var(--gray-500); margin-top: .75rem; }

/* Form */
.contact__form-wrap {
  background: var(--white); border: 1.5px solid var(--gray-100);
  border-radius: var(--radius-lg); padding: 1.8rem;
  box-shadow: var(--shadow-sm);
}
.contact-form { display: flex; flex-direction: column; gap: 1.2rem; }
.form-group   { display: flex; flex-direction: column; gap: .4rem; }
.form-label   { font-size: .88rem; font-weight: 600; color: var(--gray-700); }
.form-required{ color: #dc2626; font-size: .78rem; margin-left: 4px; }
.form-input {
  width: 100%; padding: 12px 14px;
  border: 1.5px solid var(--gray-200, #e2e8f0);
  border-radius: 8px; font-size: .92rem; font-family: var(--font);
  color: var(--gray-800); background: var(--white);
  transition: var(--trans); outline: none;
}
.form-input:focus { border-color: var(--blue-500); box-shadow: 0 0 0 3px rgba(37,99,235,.1); }
.form-select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2364748b'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; background-size: 18px; padding-right: 40px; cursor: pointer; }
.form-textarea{ resize: vertical; min-height: 130px; }
.form-submit  { margin-top: .4rem; font-size: 1rem; }

/* === FOOTER === */
.footer { background: var(--gray-900); padding: 3.5rem 0 2.5rem; }
.footer__inner { display: flex; flex-direction: column; align-items: center; gap: 1.5rem; text-align: center; }
.footer__top { display: flex; flex-direction: column; align-items: center; gap: .6rem; }
.footer__logo { display: flex; align-items: center; gap: 10px; font-size: 1rem; font-weight: 700; color: var(--white); text-decoration: none; }
.footer__tagline { font-size: .87rem; color: var(--gray-500); }
.footer__nav  { display: flex; gap: 20px; flex-wrap: wrap; justify-content: center; }
.footer__nav a{ color: var(--gray-500); text-decoration: none; font-size: .83rem; transition: var(--trans); }
.footer__nav a:hover { color: var(--blue-400); }
.footer__copy { font-size: .78rem; color: var(--gray-700); }

/* === SCROLL REVEAL === */
[data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity .65s ease, transform .65s ease; }
[data-reveal].revealed { opacity: 1; transform: translateY(0); }

/* === RESPONSIVE === */
@media (max-width: 960px) {
  .header__nav { display: none; }
  .header__nav.open {
    display: flex; flex-direction: column;
    position: fixed; top: 68px; left: 0; right: 0;
    background: rgba(255,255,255,.99); padding: 2rem 24px;
    border-bottom: 1px solid var(--gray-100); gap: 1.5rem; z-index: 899;
    box-shadow: var(--shadow-md);
  }
  .header__nav.open a { font-size: 1rem; color: var(--gray-800); }
  .header__cta { display: none; }
  .hamburger   { display: flex; }

  .about__compare { grid-template-columns: 1fr; }
  .compare-arrow  { transform: rotate(90deg); width: fit-content; margin: 0 auto; }
  .compare-arrow__icon { font-size: 1.5rem; }

  .flow-steps     { flex-direction: column; align-items: center; }
  .flow-arrow     { transform: rotate(90deg); margin: 0; }
  .flow-step      { max-width: 320px; }

  .instructor__body { grid-template-columns: 1fr; gap: 2.5rem; }
  .instructor__photo-wrap { max-width: 280px; margin: 0 auto; }

  .problems__grid  { grid-template-columns: 1fr; }
  .curriculum__grid { grid-template-columns: 1fr; }
  .pricing__grid   { grid-template-columns: 1fr; max-width: 440px; margin: 0 auto; }

  .contact__body { grid-template-columns: 1fr; }

  .stat-divider { display: none; }
  .stats-bar__inner { gap: 2rem; }
}

@media (max-width: 600px) {
  .section { padding: 5rem 0; }
  .hero__body { padding-top: 3rem; padding-bottom: 3rem; }
  .hero__title { font-size: 2rem; }
  .pricing-card { padding: 2rem 1.5rem; }
}