/* ==========================================================================
   SHARPEN — responsive.css
   Breakpoints: desktop 1024-1439, tablet 768-1023, mobile 360-767
   ========================================================================== */

/* ---------- Tablet & down (<= 1023px) ---------- */
@media (max-width: 1023px) {
  :root {
    --header-h: 68px;
  }

  .nav,
  .header-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .spec-cols {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
  }

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

  .timeline {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
  }

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

  .form-wrap {
    grid-template-columns: 1fr;
  }

  .form-aside {
    position: static;
  }

  .footer__top {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .footer__brand {
    grid-column: 1 / -1;
  }

  .detail-block {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .process__row {
    grid-template-columns: 56px 1fr;
    gap: 12px 20px;
  }

  .process__desc {
    grid-column: 2;
  }
}

/* ---------- Mobile (<= 767px) ---------- */
@media (max-width: 767px) {
  html {
    font-size: 15px;
  }

  .grid-2,
  .grid-3,
  .grid-4,
  .compare,
  .split,
  .stats,
  .project-grid,
  .insight-grid,
  .spec-cols,
  .field-grid {
    grid-template-columns: 1fr;
  }

  .split--reverse .split__media {
    order: 0;
  }

  .timeline {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .timeline__step {
    padding-top: 22px;
  }

  .hero__meta {
    font-size: 0.72rem;
  }

  .flow__desc {
    display: none;
  }

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

  .btn {
    width: 100%;
  }

  .footer__top {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer__bottom {
    flex-direction: column;
  }

  .cta-band {
    padding: 44px 24px;
  }

  .faq__q {
    font-size: 1.05rem;
    padding: 22px 0;
  }

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

  .to-top {
    right: 16px;
    bottom: 16px;
  }

  .process__name {
    font-size: 1.15rem;
  }
}

/* ---------- Large desktop (>= 1440px) ---------- */
@media (min-width: 1440px) {
  :root {
    --maxw: 1280px;
  }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- 클라이언트 목록 (메인 > 샤픈의 클라이언트) ---------- */
.client-more { display: none; }

@media (max-width: 900px) {
  /* 업종 이름을 위로, 회사 목록을 아래 전체 폭으로 */
  .client-cat {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 22px 0;
  }
  .client-cat__label { font-size: 1rem; }
  .client-names { gap: 8px 10px; }
  .client-names span {
    font-size: 0.9rem;
    white-space: normal;
    word-break: keep-all;
  }
}

@media (max-width: 767px) {
  /* 목록이 너무 길어 3줄까지만 보이고 '전체 보기'로 펼침 */
  .client-names.is-collapsible {
    max-height: 5.6em;
    overflow: hidden;
    position: relative;
    -webkit-mask-image: linear-gradient(#000 55%, transparent);
    mask-image: linear-gradient(#000 55%, transparent);
  }
  .client-names.is-collapsible.is-open {
    max-height: none;
    -webkit-mask-image: none;
    mask-image: none;
  }
  .client-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 4px;
    padding: 0;
    border: 0;
    background: none;
    font: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    cursor: pointer;
  }
  .client-more::after { content: "+"; font-size: 1rem; line-height: 1; }
  .client-more[aria-expanded="true"]::after { content: "−"; }
}