/* Адаптивная вёрстка — планшеты, телефоны, узкие экраны */

:root {
  --header-height: 58px;
  --editor-header-height: 62px;
}

/* ── Общие правила ── */

img,
svg,
video {
  max-width: 100%;
  height: auto;
}

.page-main,
.landing,
.profile-page,
.solution-page,
.auth-section {
  min-width: 0;
}

/* ── ≤1200px — ноутбуки и планшеты landscape ── */

@media (max-width: 1200px) {
  .page-main:has(.landing) {
    max-width: 100%;
  }

  .layout {
    grid-template-columns: 1fr minmax(280px, 340px);
  }

  .landing-demo__stage {
    grid-template-columns: minmax(180px, 1fr) 44px minmax(160px, 1fr) 44px minmax(140px, 1fr);
  }

  .page-main {
    max-width: 100%;
  }
}

/* ── ≤960px — планшеты ── */

@media (max-width: 960px) {
  .page-body .header__nav-panel {
    max-width: 100%;
  }

  .page-main {
    padding: 28px 20px 40px;
  }

  .flash-list {
    padding: 0 20px;
  }

  .profile-header {
    flex-direction: column;
    align-items: stretch;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .topic-progress__header {
    align-items: flex-start;
  }

  .block-gallery {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }

  .landing .hero--landing {
    margin-bottom: 56px;
  }

  .how-it-works,
  .block-showcase,
  .features,
  .topics-preview {
    margin-bottom: 56px;
  }

  .solution-header h1 {
    font-size: 1.35rem;
  }

  .solution-blocks-preview {
    min-height: 160px;
  }
}

/* ── ≤768px — планшеты portrait и большие телефоны ── */

@media (max-width: 768px) {
  .site-nav {
    gap: 4px;
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 2px;
  }

  .site-nav::-webkit-scrollbar {
    display: none;
  }

  .site-nav__link,
  .btn--nav {
    padding: 8px 10px;
    font-size: 0.85rem;
    flex-shrink: 0;
  }

  .site-nav__user {
    width: 100%;
    padding: 4px 10px 0;
    font-size: 0.8rem;
  }

  .page-main {
    padding: 24px 16px 32px;
  }

  .flash-list {
    margin-top: 12px;
    padding: 0 16px;
  }

  .hero {
    gap: 28px;
    margin-bottom: 48px;
  }

  .hero__title {
    font-size: clamp(1.5rem, 6vw, 2rem);
  }

  .hero__text {
    font-size: 0.98rem;
  }

  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero__actions .btn {
    justify-content: center;
    text-align: center;
  }

  .section-title {
    font-size: 1.3rem;
    margin-bottom: 20px;
  }

  .section-lead {
    margin-bottom: 20px;
    font-size: 0.92rem;
  }

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

  .feature-card {
    padding: 20px;
  }

  .cta-block {
    padding: 36px 20px;
    border-radius: 14px;
  }

  .cta-block h2 {
    font-size: 1.3rem;
  }

  .cta-block .btn--large {
    width: 100%;
    justify-content: center;
  }

  .auth-section {
    min-height: auto;
    padding-top: 8px;
  }

  .auth-card {
    padding: 28px 20px;
    border-radius: 14px;
  }

  .auth-card__title {
    font-size: 1.35rem;
  }

  .profile-header__title {
    font-size: 1.45rem;
  }

  .profile-page {
    gap: 24px;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .stat-card {
    padding: 16px;
  }

  .stat-card__value {
    font-size: 1.65rem;
  }

  .topic-progress {
    padding: 16px;
  }

  .topic-progress__header {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .progress-bar {
    width: 100%;
  }

  .task-row {
    flex-wrap: wrap;
    align-items: flex-start;
  }

  .task-row__info {
    width: 100%;
  }

  .task-row__attempts {
    padding-left: 28px;
  }

  .solution-page {
    padding-top: 4px;
  }

  .breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 6px;
    line-height: 1.45;
  }

  .solution-header__meta {
    font-size: 0.85rem;
    line-height: 1.5;
  }

  .solution-actions {
    flex-direction: column;
  }

  .solution-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .attempt-item summary {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .step-card {
    padding: 20px 16px;
  }

  .step-blocks-preview {
    max-width: 100%;
  }

  .topics-preview__grid {
    gap: 8px;
  }

  .topic-chip {
    font-size: 0.85rem;
    padding: 7px 12px;
  }

  .code-editor-help-modal__dialog {
    width: min(460px, calc(100% - 24px));
    max-height: calc(100vh - 32px);
  }

  .header__nav-panel .site-nav {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .header__nav-panel .site-nav::-webkit-scrollbar {
    display: none;
  }

  .header__nav-panel .site-nav__link,
  .header__nav-panel .btn--nav {
    flex-shrink: 0;
  }
}

/* ── ≤480px — телефоны ── */

@media (max-width: 480px) {
  .site-nav__user {
    display: none;
  }

  .page-main {
    padding: 20px 12px 28px;
  }

  .flash-list {
    padding: 0 12px;
  }

  .site-footer {
    padding: 16px 12px;
    font-size: 0.8rem;
  }

  .hero__badge {
    font-size: 0.78rem;
    margin-bottom: 12px;
  }

  .hero__points li {
    font-size: 0.88rem;
  }

  .hero__actions .btn--large {
    padding: 11px 18px;
    font-size: 0.95rem;
  }

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

  .block-gallery {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .block-gallery__item {
    padding: 14px 10px;
  }

  .block-gallery__code {
    font-size: 0.72rem;
  }

  .landing-demo {
    padding: 14px;
    border-radius: 12px;
  }

  .step-card__visual {
    min-height: 140px;
  }

  .pb-block {
    font-size: 0.7rem;
  }

  .pb-block--mini {
    font-size: 0.62rem;
    padding: 4px 8px;
  }

  .auth-card {
    padding: 24px 16px;
  }

  .form-input {
    font-size: 16px;
  }

  .empty-state {
    padding: 32px 16px;
  }

  .profile-hero {
    padding: 18px 14px;
  }

  .profile-hero__meta {
    font-size: 0.82rem;
  }

  .topic-card {
    padding: 14px;
  }

  .topic-card__title {
    font-size: 1rem;
  }

  .solution-header h1 {
    font-size: 1.2rem;
  }

  .solution-code {
    padding: 12px;
    font-size: 0.78rem;
  }

  .topic-guide-modal__dialog {
    width: calc(100% - 16px);
    max-height: calc(100vh - 24px);
    margin: 8px;
  }

  .topic-guide-modal__header {
    padding: 14px 16px;
  }

  .topic-guide-modal__body {
    padding: 16px;
  }

  .input-modal {
    padding: 12px;
  }

  .input-modal__dialog {
    padding: 16px;
  }

  .code-editor-help-modal {
    padding: 10px;
  }

  .code-editor-help-modal__dialog {
    width: 100%;
    max-height: calc(100vh - 20px);
  }

  .code-editor-help-modal__body {
    padding: 12px 14px;
  }

  .code-editor-help-modal__section ul {
    font-size: 0.82rem;
  }
}

/* ── Безопасные зоны (вырезы экрана) ── */

@supports (padding: max(0px)) {
  .header {
    padding-left: max(12px, env(safe-area-inset-left));
    padding-right: max(12px, env(safe-area-inset-right));
    padding-top: max(10px, env(safe-area-inset-top));
  }

  .page-main {
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
  }

  .site-footer {
    padding-bottom: max(16px, env(safe-area-inset-bottom));
  }

  body:not(.page-body) .sidebar-runbar,
  body:not(.page-body) .panel__header {
    padding-left: max(10px, env(safe-area-inset-left));
    padding-right: max(10px, env(safe-area-inset-right));
  }
}