/* ============================================
   clck — components: кнопки, карточки, шапка, футер,
   медиа-рамки, формы
   ============================================ */

/* ---------- Кнопки: рамка + жёсткая тень, «продавливание» ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 22px;
  border: var(--border-w) solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-ink);
  font-weight: 700;
  font-size: var(--fs-sm);
  text-transform: uppercase;
  letter-spacing: .06em;
  white-space: nowrap;
  box-shadow: 4px 4px 0 var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition),
              background var(--transition), color var(--transition);
}
.btn:hover  { transform: translate(2px, 2px); box-shadow: 2px 2px 0 var(--color-border); }
.btn:active { transform: translate(4px, 4px); box-shadow: 0 0 0 var(--color-border); }

.btn--sm { min-height: 44px; padding: 0 16px; font-size: var(--fs-xs); box-shadow: 3px 3px 0 var(--color-border); }

.btn--primary { background: var(--color-primary); color: var(--color-on-primary); }
.btn--primary:hover { background: var(--color-primary-hover); box-shadow: 2px 2px 0 var(--color-border); }

.btn--ghost { background: transparent; }
.btn--ghost:hover { background: var(--color-ink); color: var(--color-paper); box-shadow: 2px 2px 0 var(--color-primary); }

.btn--white { background: var(--color-paper); }

/* ---------- Карточки ---------- */
.card {
  background: var(--color-surface);
  border: var(--border-w) solid var(--color-border);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover { transform: translate(-2px, -2px); box-shadow: 8px 8px 0 var(--color-border); }

/* ---------- Бейджи ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  padding: 0 10px;
  border: var(--border-w) solid var(--color-border);
  background: var(--color-primary);
  color: var(--color-on-primary);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
}
.badge--outline { background: transparent; color: var(--color-ink); }

/* ---------- Медиа-рамки под картинки ---------- */
.media-block { display: block; }
.media-frame {
  position: relative;
  background: var(--color-primary);
  border: var(--border-w-thick) solid var(--color-border);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.media-frame img { width: 100%; height: 100%; object-fit: cover; }
.media-frame--4x5  { aspect-ratio: 4 / 5; }
.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--21x9 { aspect-ratio: 21 / 9; }

/* Пока файл картинки не добавлен — рамка выглядит намеренно */
.media-frame.is-empty::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(45deg, rgba(255,255,255,.16) 0 14px, transparent 14px 28px);
}
.media-frame.is-empty::after {
  content: 'IMAGE PLACEHOLDER';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: .22em;
  color: var(--color-on-primary);
}
.media-block figcaption {
  position: relative;
  z-index: 1;
  display: inline-block;
  margin-top: 0;
  padding: 8px 14px;
  background: var(--color-ink);
  color: var(--color-paper);
  border: var(--border-w) solid var(--color-border);
  border-top: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .14em;
}

/* ---------- Логотип ---------- */
.logo { display: inline-flex; align-items: center; gap: 10px; flex: none; }
.logo img { width: 32px; height: 32px; }
.logo__name { font-size: 20px; font-weight: 800; letter-spacing: -.02em; color: var(--color-ink); }

/* ---------- Шапка ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-surface);
  border-bottom: var(--border-w-thick) solid var(--color-border);
  transition: box-shadow var(--transition);
}
.header.is-scrolled { box-shadow: 0 4px 0 var(--color-border); }

.header__inner { height: var(--header-height); display: flex; align-items: center; gap: 24px; }

.nav { display: flex; gap: 2px; }
.nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  font-size: var(--fs-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  transition: background var(--transition), color var(--transition);
}
.nav a:hover { background: var(--color-ink); color: var(--color-paper); }

.header__actions { margin-left: auto; display: flex; gap: 12px; flex: none; }

/* Бургер */
.burger {
  display: none;
  width: 48px;
  height: 48px;
  margin-left: auto;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border: var(--border-w) solid var(--color-border);
  background: var(--color-surface);
}
.burger__bar {
  width: 20px;
  height: 2px;
  background: var(--color-ink);
  transition: transform var(--transition), opacity var(--transition);
}
.burger.is-open { background: var(--color-ink); }
.burger.is-open .burger__bar { background: var(--color-paper); }
.burger.is-open .burger__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.is-open .burger__bar:nth-child(2) { opacity: 0; }
.burger.is-open .burger__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Мобильная панель */
.mobile-panel {
  position: fixed;
  top: calc(var(--header-height) + 3px);
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 40;
  background: var(--color-surface);
  padding: 12px 24px 32px;
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
}
.mobile-panel.is-open { opacity: 1; visibility: visible; transform: none; }
.mobile-panel nav a {
  display: flex;
  align-items: center;
  min-height: 56px;
  font-size: var(--fs-lg);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
  border-bottom: var(--border-w) solid var(--color-border);
}
.mobile-panel nav a:hover { background: var(--color-ink); color: var(--color-paper); padding-left: 8px; }
.mobile-panel__actions { display: grid; gap: 12px; padding-top: 24px; }

.overlay {
  position: fixed;
  inset: 0;
  z-index: 35;
  background: var(--color-overlay);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}
.overlay.is-open { opacity: 1; visibility: visible; }

@media (max-width: 1160px) {
  .nav a { padding: 0 8px; }
}
@media (max-width: 900px) {
  .nav, .header__actions { display: none; }
  .burger { display: flex; }
}

/* ---------- Футер: чёрный блок ---------- */
.footer {
  background: var(--color-ink);
  color: var(--color-text-invert);
  border-top: 6px solid var(--color-primary);
  padding-top: 72px;
}
.footer__grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 48px; }
.footer .logo__name { color: var(--color-paper); }
.footer__brand p { margin-top: 14px; font-size: var(--fs-sm); color: var(--color-text-invert-muted); max-width: 260px; }
.footer__title {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--color-primary);
  margin-bottom: 16px;
}
.footer__list li { margin-bottom: 10px; }
.footer__list a { font-size: var(--fs-sm); color: var(--color-text-invert); transition: color var(--transition); }
.footer__list a:hover { color: var(--color-primary); }
.footer__contact { font-size: var(--fs-sm); }
.footer__contact a { color: var(--color-text-invert); font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }
.footer__contact a:hover { color: var(--color-primary); }
.footer__note { margin-top: 8px; font-size: var(--fs-xs); color: var(--color-text-invert-muted); }

.footer__bottom {
  border-top: var(--border-w) solid var(--color-line-invert);
  padding: 20px 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  justify-content: space-between;
  font-size: var(--fs-sm);
  color: var(--color-text-invert-muted);
}
.footer__bottom a { color: var(--color-text-invert); font-weight: 600; }
.footer__bottom a:hover { color: var(--color-primary); }

@media (max-width: 900px) { .footer__grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer__grid { grid-template-columns: 1fr; gap: 32px; } }

/* ---------- Карточки уроков (общие для лендинга и /learn/) ---------- */
.lesson-card { padding: 22px 24px; display: flex; flex-direction: column; gap: 12px; }
.lesson-card h3 { font-size: var(--fs-md); }
.lesson-card p { font-size: var(--fs-sm); margin: 0; flex: 1; }
.lesson-card__meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  margin-top: 4px;
}
.lesson-card__meta svg { width: 14px; height: 14px; stroke: currentColor; }

/* ---------- Формы ---------- */
.field { margin-bottom: 16px; }
.field label { display: block; font-family: var(--font-mono); font-size: var(--fs-xs); font-weight: 600; text-transform: uppercase; letter-spacing: .08em; margin-bottom: 8px; }
.input, .textarea {
  width: 100%;
  min-height: 48px;
  padding: 0 14px;
  font: inherit;
  color: var(--color-ink);
  background: var(--color-surface);
  border: var(--border-w) solid var(--color-border);
  transition: box-shadow var(--transition);
}
.textarea { min-height: 120px; padding: 12px 14px; resize: vertical; }
.input:focus, .textarea:focus { outline: none; box-shadow: 4px 4px 0 var(--color-primary); }
/* ============================================
   Кейсы: карточки-кнопки + модалки
   ============================================ */

/* Карточка кейса теперь кнопка, открывающая модалку */
button.case-card { width: 100%; cursor: pointer; text-align: left; font: inherit; }
.case-card__more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--color-primary);
}
.case-card__more svg { width: 14px; height: 14px; stroke: currentColor; transition: transform var(--transition); }
.case-card:hover .case-card__more svg { transform: translateX(4px); }

/* ---------- Модалка ---------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  padding: 32px 16px;
  overflow-y: auto;
  background: var(--color-overlay);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}
.modal.is-open { opacity: 1; visibility: visible; }

.modal__dialog {
  position: relative;
  margin: auto;
  width: 100%;
  max-width: 860px;
  background: var(--color-surface);
  border: var(--border-w-thick) solid var(--color-border);
  box-shadow: var(--shadow-lg);
}

.modal__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  border-bottom: var(--border-w) solid var(--color-border);
}
.modal__title { font-size: var(--fs-lg); margin-top: 8px; text-transform: none; letter-spacing: 0; }

.modal__close {
  width: 44px;
  height: 44px;
  flex: none;
  border: var(--border-w) solid var(--color-border);
  background: var(--color-paper);
  font-size: 20px;
  font-weight: 800;
  line-height: 1;
  box-shadow: 3px 3px 0 var(--color-border);
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
}
.modal__close:hover { background: var(--color-ink); color: var(--color-paper); box-shadow: 1px 1px 0 var(--color-primary); }

.modal__body { padding: 24px; }
.modal__media { margin-bottom: 20px; }
.modal__body p { font-size: var(--fs-sm); }
.modal h3 { margin: 20px 0 10px; }

.modal-table { width: 100%; border: var(--border-w) solid var(--color-border); border-collapse: collapse; font-size: var(--fs-sm); }
.modal-table th, .modal-table td { padding: 10px 12px; border-bottom: var(--border-w) solid var(--color-border); text-align: left; }
.modal-table tr:last-child td { border-bottom: 0; }
.modal-table th {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  background: var(--color-primary);
  color: var(--color-on-primary);
}
.modal-table td:first-child { font-weight: 600; color: var(--color-ink); }
.modal-table td.mono { font-family: var(--font-mono); }

.modal__note { margin-top: 16px; font-size: var(--fs-xs); color: var(--color-text-muted); }

@media (max-width: 640px) {
  .modal { padding: 16px 10px; }
  .modal__head { padding: 16px; }
  .modal__body { padding: 16px; }
  .modal-table th, .modal-table td { padding: 8px 10px; }
}