/* =====================================================
   RESPONSIVE.CSS — CHIARA ALDUINI PORTFOLIO
   Single source of truth for all responsive rules.
   Applied to: homepage + all inner pages.
   ===================================================== */

/* ── Global resets (apply at all sizes) ── */
*, *::before, *::after { box-sizing: border-box; }

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ── Hamburger: hidden on desktop ── */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 8px;
  /* Must be above header (z-index 100) and below mobile-nav (9999) */
  position: relative;
  z-index: 10000;
}

.hamburger span {
  display: block;
  width: 26px;
  height: 2px;
  background: #111110;
  transition: transform 0.3s ease, opacity 0.3s ease;
  transform-origin: center;
}

/* X animation */
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ── Mobile nav overlay: hidden until .open ── */
.mobile-nav {
  position: fixed;
  inset: 0;               /* top/left/right/bottom: 0 */
  width: 100%;
  height: 100vh;
  background: #ffffff;
  z-index: 9999;          /* below hamburger button (10000), above everything else */
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  /* Off-screen to the right by default */
  transform: translateX(100%);
  transition: transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
  /* No overflow hidden — prevents touch scroll issues */
  overflow-y: auto;
}

.mobile-nav.open {
  transform: translateX(0);
}

.mobile-nav a {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 52px;
  color: #111110;
  text-decoration: none;
  text-transform: uppercase;
  line-height: 1.1;
  padding: 16px 40px;
  border-bottom: 1px solid #e8e6df;
  display: block;
  width: 100%;
  text-align: center;
  transition: opacity 0.15s ease;
  /* Ensure tappable */
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.mobile-nav a:last-child {
  border-bottom: none;
}

.mobile-nav a:active {
  opacity: 0.45;
}

/* =====================================================
   MOBILE  ≤ 768px
   ===================================================== */
@media (max-width: 768px) {

  /* Variables */
  :root {
    --padding: 20px;
    --space-xl: 56px;
    --space-lg: 36px;
    --space-md: 24px;
  }

  /* ── Header ── */
  header nav {
    display: none !important;
  }

  .hamburger {
    display: flex !important;
  }

  header {
    padding: 0 20px;
  }

  .logo {
    font-size: 20px !important;
  }

  .logo span {
    display: none !important;
  }

  /* ── Hero ── */
  .hero {
    min-height: 60vh !important;
    padding: calc(var(--header-h) + 16px) 20px 28px !important;
  }

  .hero-title {
    font-size: clamp(44px, 12vw, 72px) !important;
    margin-bottom: 16px !important;
  }

  .hero-meta {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 10px !important;
    padding-top: 18px !important;
  }

  .hero-sub {
    max-width: 100% !important;
    font-size: 15px !important;
    line-height: 1.6 !important;
  }

  .hero-scroll-hint {
    display: none;
  }

  /* ── Section header ── */
  .section-header {
    display: block !important;
    padding-bottom: 20px !important;
    margin-bottom: 0 !important;
  }

  .section-label {
    margin-bottom: 8px !important;
  }

  .section-title {
    font-size: clamp(32px, 10vw, 56px) !important;
    margin-bottom: 12px !important;
  }

  .section-header-desc {
    max-width: 100% !important;
    font-size: 14px !important;
  }

  /* ── Three Pillars ── */
  .pillars {
    padding-top: 0 !important;
    padding-bottom: 0 !important;
  }

  .pillars-grid {
    grid-template-columns: 1fr !important;
    border-bottom: 1px solid var(--border-light);
  }

  .pillar {
    border-right: none !important;
    border-bottom: 1px solid var(--border-light) !important;
    padding: 22px 20px !important;
    min-height: auto !important;
    gap: 10px !important;
  }

  .pillar:last-child {
    border-bottom: none !important;
  }

  .pillar h3 {
    font-size: clamp(22px, 6vw, 34px) !important;
  }

  .pillar p {
    font-size: 13px !important;
    line-height: 1.6 !important;
  }

  /* ── Case Studies section ── */
  .case-studies {
    padding: 36px 0 48px !important;
  }

  .case-studies > .section-header {
    padding-left: 20px !important;
    padding-right: 20px !important;
  }

  .case-grid {
    grid-template-columns: 1fr !important;
    gap: 0 !important;
    border-left: none !important;
    border-right: none !important;
  }

  .case-card {
    border-bottom: 1px solid var(--border-light) !important;
  }

  .case-card:last-child {
    border-bottom: none !important;
  }

  .case-img {
    aspect-ratio: 16 / 9 !important;
    width: 100% !important;
  }

  .case-img img {
    width: 100% !important;
    height: 100% !important;
    object-fit: cover !important;
  }

  .case-body {
    padding: 20px 20px 28px !important;
    gap: 10px !important;
  }

  .case-title {
    font-size: 24px !important;
  }

  .case-desc {
    font-size: 14px !important;
    line-height: 1.65 !important;
  }

  .case-tags {
    padding-top: 8px !important;
  }

  /* ── More Work / Other Projects ── */
  .other-projects {
    padding: 0 0 40px !important;
  }

  .other-header {
    padding-left: 20px !important;
    padding-right: 20px !important;
    margin-bottom: 0 !important;
  }

  .projects-grid {
    grid-template-columns: 1fr 1fr !important;
    gap: 0 !important;
    border-left: none !important;
    border-right: none !important;
  }

  .project-card {
    border-bottom: 1px solid var(--border-light) !important;
    border-right: none !important;
  }

  .project-img {
    aspect-ratio: 4 / 3 !important;
    width: 100% !important;
  }

  .project-img img {
    width: 100% !important;
    height: 100% !important;
    object-fit: cover !important;
  }

  .project-info {
    padding: 10px 12px 14px !important;
  }

  .project-info h3 {
    font-size: 13px !important;
    line-height: 1.25 !important;
  }

  .project-info p {
    font-size: 11px !important;
    line-height: 1.5 !important;
    display: none;
  }

  /* ── Footer ── */
  footer {
    padding: 36px 20px !important;
  }

  .footer-grid {
    grid-template-columns: 1fr !important;
    gap: 24px !important;
    margin-bottom: 24px !important;
    padding-bottom: 24px !important;
  }

  .footer-bottom {
    flex-direction: column !important;
    gap: 10px !important;
    align-items: flex-start !important;
  }

  /* =====================================================
     CASE STUDY INNER PAGES
     ===================================================== */

  .case-hero {
    min-height: auto !important;
    padding: calc(var(--header-h) + 16px) 20px 24px !important;
  }

  /* Metadata row: CLIENT / SCOPE / YEAR */
  .case-hero-meta {
    display: flex !important;
    flex-direction: column !important;
    gap: 14px !important;
    padding-top: 20px !important;
    border-top: 1px solid var(--border-light) !important;
    margin-top: 20px !important;
  }

  .case-meta-item {
    display: flex !important;
    flex-direction: column !important;
    gap: 3px !important;
  }

  .case-meta-item span,
  .case-meta-item label {
    font-size: 10px !important;
    letter-spacing: 0.12em !important;
  }

  .case-meta-item p,
  .case-meta-item strong,
  .case-meta-item .meta-value {
    font-size: 15px !important;
    line-height: 1.4 !important;
  }

  /* Body sections */
  .case-body-section {
    display: block !important;
    padding: 28px 20px !important;
  }

  .case-section-label {
    position: static !important;
    margin-bottom: 8px !important;
    display: block !important;
  }

  .case-section-content h2 {
    font-size: 26px !important;
    margin-bottom: 14px !important;
  }

  .case-section-content p {
    font-size: 15px !important;
    line-height: 1.7 !important;
    max-width: 100% !important;
  }

  /* Image grids inside case studies */
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr !important;
    gap: 2px !important;
  }

  .grid-4 {
    grid-template-columns: 1fr 1fr !important;
    gap: 2px !important;
  }

  .grid-2 img,
  .grid-3 img,
  .grid-4 img {
    width: 100% !important;
    height: auto !important;
    aspect-ratio: 16 / 9 !important;
    object-fit: cover !important;
  }

  /* Full-width images */
  .case-img-full,
  .cs-img-full,
  .case-full-img {
    width: 100% !important;
    padding: 0 !important;
  }

  .case-img-full img,
  .cs-img-full img,
  .case-full-img img {
    width: 100% !important;
    height: auto !important;
  }

  /* Pull quote */
  .case-quote {
    padding: 28px 20px !important;
  }

  .case-quote blockquote {
    font-size: 20px !important;
    line-height: 1.35 !important;
  }

  /* Case-to-case nav */
  .case-nav {
    flex-direction: column !important;
    gap: 12px !important;
    padding: 28px 20px !important;
    align-items: flex-start !important;
  }

  /* =====================================================
     PORTFOLIO PAGE
     ===================================================== */

  .filter-bar {
    padding: 16px 20px !important;
    flex-wrap: wrap !important;
    gap: 8px !important;
  }

  .filter-btn {
    font-size: 10px !important;
    padding: 6px 12px !important;
  }

  /* Hide the last empty placeholder card */
  .project-card[style*="visibility:hidden"] {
    display: none !important;
  }

  /* =====================================================
     CONTACT / ABOUT PAGES
     ===================================================== */

  .page-main {
    padding: calc(var(--header-h) + 16px) 20px 40px !important;
  }

  .contact-grid {
    grid-template-columns: 1fr !important;
    gap: 32px !important;
  }

  .about-grid {
    grid-template-columns: 1fr !important;
    gap: 24px !important;
  }

  /* ── Poster grid (case-prati) ── */
  .poster-grid-2 {
    grid-template-columns: 1fr !important;
  }

  .poster-grid-2 img {
    width: 100% !important;
    height: auto !important;
    aspect-ratio: 3 / 4 !important;
    object-fit: cover !important;
  }

  /* ── Contact form ── */
  .contact-form input,
  .contact-form textarea {
    width: 100% !important;
    font-size: 16px !important; /* prevents auto-zoom on iOS */
    box-sizing: border-box !important;
  }

  .submit-btn {
    width: 100% !important;
    text-align: center !important;
    box-sizing: border-box !important;
  }

  /* ── About page ── */
  .about-image {
    width: 100% !important;
  }

  .about-image img {
    width: 100% !important;
    height: auto !important;
    aspect-ratio: 1 / 1 !important;
    object-fit: cover !important;
  }

  .about-tags {
    flex-wrap: wrap !important;
    gap: 8px !important;
  }

  .about-cta {
    display: block !important;
    width: 100% !important;
    text-align: center !important;
    box-sizing: border-box !important;
    margin-top: 24px !important;
  }

  /* ── Contact list ── */
  .contact-list {
    padding: 0 !important;
  }

  .contact-list li {
    flex-direction: column !important;
    gap: 4px !important;
    padding: 14px 0 !important;
  }

  /* ── Typography ── */
  h1 { font-size: clamp(32px, 9vw, 52px) !important; }
  h2 { font-size: clamp(22px, 6vw, 36px) !important; }
  h3 { font-size: clamp(18px, 5vw, 28px) !important; }
  p  { font-size: 15px; line-height: 1.7; }

}

/* =====================================================
   VERY SMALL PHONES  ≤ 480px
   ===================================================== */
@media (max-width: 480px) {

  .hero-title {
    font-size: clamp(36px, 11vw, 52px) !important;
  }

  .mobile-nav a {
    font-size: 40px !important;
    padding: 14px 20px !important;
  }

  /* Stack portfolio to 1 column */
  .projects-grid {
    grid-template-columns: 1fr !important;
  }

  .grid-4 {
    grid-template-columns: 1fr !important;
  }

}

/* =====================================================
   TABLET  769–1023px
   ===================================================== */
@media (min-width: 769px) and (max-width: 1023px) {

  :root { --padding: 32px; }

  header nav {
    display: none !important;
  }

  .hamburger {
    display: flex !important;
  }

  .section-header {
    display: block !important;
    padding-bottom: 24px;
  }

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

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

}

/* =====================================================
   LARGE DESKTOP  ≥ 1280px
   ===================================================== */
@media (min-width: 1280px) {
  :root { --padding: 64px; }
}