/* ===========================
   HAMBURGER NAVIGATION
=========================== */

.hamburger-menu {
  position: relative;
  height: 72px;
  background: transparent !important;
}

.menu-toggle {
  display: block;
  margin: 0.75rem auto 1rem;
  background: var(--accent);
  color: #f9fafb;
  border: none;
  border-radius: 999px;
  padding: 10px 18px;
  font-size: 22px;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(44,40,37,.20);
  transition:
    transform .18s ease,
    background .2s ease,
    box-shadow .2s ease;
}

.menu-toggle:hover {
  background: var(--accent-strong);
  transform: scale(1.05);
}

.menu-toggle:active {
  transform: scale(.92);
}

.menu-links {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: .6rem;

  width: 260px;
  max-width: 90vw;

  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: 0 12px 30px rgba(44,40,37,.20);
  opacity: 0;
  transform: translateY(-6px) scale(0.98);
  pointer-events: none;
  max-height: 0;
  overflow: hidden;
  transition:
    max-height 0.35s cubic-bezier(.4,0,.2,1),
    opacity 0.25s ease,
    transform 0.25s cubic-bezier(.4,0,.2,1);
}

.menu-links li {
  width: 100%;
}

.menu-links a {
  display: block;
  width: 100%;
  box-sizing: border-box;
  text-align: center;
}

.hamburger-menu.open .menu-links {
  max-height: 300px;
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
  padding: 1rem;
}

.menu-links a {
  position: relative;
  display: inline-block;
  padding: 10px 22px;
  border-radius: 8px;
  background: rgba(237, 232, 225, 0.06);
  color: var(--text);
  font-family: "Quicksand", sans-serif;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid var(--border);
  box-shadow: none;
  transition:
    background .2s ease,
    color .2s ease,
    border-color .2s ease,
    transform .22s cubic-bezier(.2,.8,.2,1),
    box-shadow .22s cubic-bezier(.2,.8,.2,1);
}

.menu-links a::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 6px;
  height: 2px;
  border-radius: 999px;
  background: var(--accent);
  opacity: 0;
  transform: scaleX(0.4);
  transform-origin: center;
  transition:
    opacity .24s ease,
    transform .24s cubic-bezier(.2,.8,.2,1);
}

.menu-links a:hover,
.menu-links a[aria-current="page"] {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: rgba(20, 150, 125, 0.40);
  transform: translateY(-1px);
}

.menu-links a:hover::after,
.menu-links a[aria-current="page"]::after {
  opacity: 1;
  transform: scaleX(1);
}

.menu-links li {
  opacity: 0;
  transform: translateY(-4px);
  transition:
    opacity 0.25s ease,
    transform 0.25s ease;
}

.hamburger-menu.open .menu-links li {
  opacity: 1;
  transform: translateY(0);
}

.hamburger-menu.open .menu-links li:nth-child(1) { transition-delay: 0.05s; }
.hamburger-menu.open .menu-links li:nth-child(2) { transition-delay: 0.1s; }
.hamburger-menu.open .menu-links li:nth-child(3) { transition-delay: 0.15s; }

.site-name {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: "Quicksand", sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  text-decoration: none;
  pointer-events: auto;
  z-index: 20;
  transition: color 0.2s ease, transform 0.18s ease;
}

.site-name:hover {
  color: var(--accent);
  transform: translateY(-50%) scale(1.05);
}

.site-name:visited {
  color: var(--text-muted);
}

.social-icons {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  gap: 10px;
  z-index: 20;
}

.social-icons a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--surface-alt);
  color: var(--text-muted);
  box-shadow: 0 4px 10px rgba(44,40,37,.14);
  transition: transform .18s ease, background .2s ease, color .2s ease;
}

.social-icons a:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-2px);
}

@media (min-width: 700px) {
  .menu-toggle {
    display: none;
  }

  .hamburger-menu {
    position: static;
  }

  .menu-links {
    width: fit-content;
    margin: 0 auto;
    padding: 0 1.25rem;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 16px;
    min-height: 72px;
    max-height: none;
    opacity: 1;
    overflow: visible;
    pointer-events: auto;
    transform: none;
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow:
      inset 0 1px 0 rgba(255,255,255,0.70),
      0 8px 24px rgba(44,40,37,0.12);
    list-style: none;
  }

  .menu-links li {
    list-style: none;
    opacity: 1;
    transform: none;
  }

  .menu-links a {
    position: relative;
    display: inline-block;
    padding: 10px 24px;
    border-radius: 8px;
    background: rgba(237, 232, 225, 0.05);
    color: var(--text);
    font-family: "Quicksand", sans-serif;
    font-weight: 600;
    text-decoration: none;
    border: 1px solid var(--border);
    box-shadow: none;
    transition:
      background .2s ease,
      color .2s ease,
      border-color .2s ease,
      transform .22s cubic-bezier(.2,.8,.2,1),
      box-shadow .22s cubic-bezier(.2,.8,.2,1);
  }

  .menu-links a:hover,
  .menu-links a[aria-current="page"] {
    background: var(--accent-soft);
    color: var(--accent);
    border-color: rgba(20, 150, 125, 0.40);
    transform: translateY(-1px);
  }

  .site-name,
  .social-icons {
    position: static;
    transform: none;
    z-index: auto;
  }
}

/* ===========================
   BUTTONS AND FIXED ACTIONS
=========================== */

.action-button,
.preview-button,
.back-link,
.play-button,
.cta-btn,
.back-to-top,
.back-nav {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 12px;

  background:
    linear-gradient(
      145deg,
      rgba(255,255,255,0.36),
      rgba(232,224,211,0.30)
    );

  color: var(--text);
  font-family: "Quicksand", sans-serif;
  font-weight: 600;
  font-size: .95rem;
  text-decoration: none;

  border: 1px solid rgba(255,255,255,0.45);

  box-shadow:
    0 3px 8px rgba(44,40,37,0.12),
    0 12px 28px rgba(44,40,37,0.14),
    inset 0 1px 0 rgba(255,255,255,0.55),
    inset 0 -1px 0 rgba(44,40,37,0.08);

  cursor: pointer;

  transition:
    background .2s ease,
    color .2s ease,
    border-color .2s ease,
    transform .22s cubic-bezier(.2,.8,.2,1),
    box-shadow .24s cubic-bezier(.2,.8,.2,1),
    filter .24s ease;
}

.action-button:hover,
.preview-button:hover,
.back-link:hover,
.play-button:hover,
.cta-btn:hover,
.back-to-top:hover,
.back-nav:hover {
  background:
    linear-gradient(
      145deg,
      rgba(255,255,255,0.48),
      rgba(232,224,211,0.38)
    );

  color: var(--accent-strong);
  border-color: rgba(20,150,125,0.35);
  transform: translateY(-2px);
  filter: saturate(1.06);

  box-shadow:
    0 5px 12px rgba(44,40,37,0.15),
    0 16px 34px rgba(44,40,37,0.16),
    inset 0 1px 0 rgba(255,255,255,0.65),
    inset 0 -1px 0 rgba(44,40,37,0.07);
}

.action-button:active,
.preview-button:active,
.back-link:active,
.play-button:active,
.cta-btn:active,
.back-to-top:active,
.back-nav:active {
  transform: scale(.97);
  box-shadow:
    0 1px 4px rgba(44, 40, 37, 0.10),
    0 3px 10px rgba(44, 40, 37, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.75),
    inset 0 2px 6px rgba(44, 40, 37, 0.06);
}

.action-button:visited,
.preview-button:visited,
.back-link:visited,
.play-button:visited,
.cta-btn:visited,
.back-to-top:visited,
.back-nav:visited {
  color: var(--text);
}

.action-button:hover:visited,
.preview-button:hover:visited,
.back-link:hover:visited,
.play-button:hover:visited,
.cta-btn:hover:visited,
.back-to-top:hover:visited,
.back-nav:hover:visited {
  color: var(--accent-strong);
}

.dark-mode .action-button,
.dark-mode .preview-button,
.dark-mode .back-link,
.dark-mode .play-button,
.dark-mode .cta-btn,
.dark-mode .back-to-top,
.dark-mode .back-nav {
  background: rgba(23, 37, 50, 0.55);
  border-color: rgba(187, 216, 233, 0.09);
  box-shadow:
    0 2px 8px rgba(0, 0, 0, 0.25),
    0 6px 20px rgba(0, 0, 0, 0.20),
    inset 0 1px 0 rgba(187, 216, 233, 0.025),
    inset 0 -1px 0 rgba(0, 0, 0, 0.20);
}

.dark-mode .action-button:hover,
.dark-mode .preview-button:hover,
.dark-mode .back-link:hover,
.dark-mode .play-button:hover,
.dark-mode .cta-btn:hover,
.dark-mode .back-to-top:hover,
.dark-mode .back-nav:hover {
  background: rgba(23, 37, 50, 0.75);
  border-color: rgba(26, 188, 156, 0.35);
  color: var(--accent);
  box-shadow:
    0 4px 12px rgba(0, 0, 0, 0.30),
    0 10px 28px rgba(0, 0, 0, 0.25),
    inset 0 1px 0 rgba(187, 216, 233, 0.035),
    inset 0 -1px 0 rgba(0, 0, 0, 0.18);
}

.cta-btn {
  margin-top: 20px;
}

.hero .cta-btn,
.hero a[href="projects.html"] {
  width: fit-content;
  min-width: 190px;
  align-self: center;
  padding: 12px 28px;
  background: var(--accent);
  color: #f9fafb;
  border-color: var(--accent-strong);
}

.hero .cta-btn:hover,
.hero a[href="projects.html"]:hover {
  background: var(--accent-strong);
  color: #f9fafb;
}

p + .action-button,
ul + .action-button {
  margin-top: 1.25rem;
}

/* fixed screen buttons */

.back-to-top,
.back-nav {
  position: fixed;
  right: 15px;
  bottom: 15px;
  z-index: 1000;
}
/* light / dark toggle */

#toggle-dark {
  position: fixed;
  bottom: 20px;
  left: 20px;
  width: 46px;
  height: 46px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;

  background:
    linear-gradient(
      145deg,
      rgba(255,255,255,0.36),
      rgba(232,224,211,0.30)
    );

  color: var(--text);
  border: 1px solid rgba(255,255,255,0.45);
  border-radius: 12px;

  font-size: 21px;
  cursor: pointer;

  box-shadow:
    0 3px 8px rgba(44,40,37,0.12),
    0 12px 28px rgba(44,40,37,0.14),
    inset 0 1px 0 rgba(255,255,255,0.55),
    inset 0 -1px 0 rgba(44,40,37,0.08);

  z-index: 9999;

  transition:
    background .2s ease,
    color .2s ease,
    border-color .2s ease,
    transform .22s cubic-bezier(.2,.8,.2,1),
    box-shadow .24s cubic-bezier(.2,.8,.2,1),
    filter .24s ease;
}

#toggle-dark:hover {
  background: rgba(255, 255, 255, 0.65);
  color: var(--accent-strong);
  border-color: rgba(20, 150, 125, 0.35);
  transform: translateY(-2px);
  box-shadow:
    0 4px 12px rgba(44, 40, 37, 0.13),
    0 10px 28px rgba(44, 40, 37, 0.10),
    inset 0 1px 0 rgba(255, 255, 255, 0.95),
    inset 0 -1px 0 rgba(44, 40, 37, 0.05);
}

#toggle-dark:active {
  transform: scale(.97);
}

.dark-mode #toggle-dark {
  background: rgba(23, 37, 50, 0.55);
  border-color: rgba(187, 216, 233, 0.09);
  box-shadow:
    0 2px 8px rgba(0, 0, 0, 0.25),
    0 6px 20px rgba(0, 0, 0, 0.20),
    inset 0 1px 0 rgba(187, 216, 233, 0.025),
    inset 0 -1px 0 rgba(0, 0, 0, 0.20);
}

.dark-mode #toggle-dark:hover {
  background: rgba(23, 37, 50, 0.75);
  border-color: rgba(26, 188, 156, 0.35);
  color: var(--accent);
}

.back-to-top:focus-visible,
.back-nav:focus-visible,
#toggle-dark:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ===========================
   CARDS
=========================== */

.card,
.system-card,
.feature-card,
.project-entry,
.contact-section {
  transition:
    transform .28s cubic-bezier(.2,.8,.2,1),
    box-shadow .28s cubic-bezier(.2,.8,.2,1),
    border-color .24s ease,
    background-color .24s ease,
    filter .24s ease;
}

.card {
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  max-width: 700px;
  margin: 1rem auto;
}

.card .preview-button,
.card .action-button {
  width: fit-content;
  margin-top: auto;
}

.card:hover,
.system-card:hover,
.feature-card:hover,
.project-entry:hover,
.contact-section:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  filter: saturate(1.04);
  box-shadow:
    0 4px 10px rgba(44,40,37,0.09),
    0 14px 32px rgba(44,40,37,0.14);
}

.dark-mode .card,
.dark-mode .system-card,
.dark-mode .feature-card,
.dark-mode .project-entry,
.dark-mode .contact-section {
  border-color: rgba(187,216,233,0.08);
  box-shadow:
    0 6px 18px var(--shadow),
    inset 0 1px 0 rgba(187,216,233,0.025);
}

.dark-mode .card:hover,
.dark-mode .system-card:hover,
.dark-mode .feature-card:hover,
.dark-mode .project-entry:hover,
.dark-mode .contact-section:hover {
  box-shadow: 0 10px 24px var(--shadow);
}

.project-entry,
.contact-section,
.click-card {
  cursor: pointer;
}

/* ===========================
   CHIPS
=========================== */

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 1rem 0;
}

.chip {
  background: rgba(44,40,37,0.07);
  color: var(--text);
  padding: 5px 14px;
  border-radius: 999px;
  font-size: .85rem;
  font-weight: 600;
  border: 1px solid rgba(44,40,37,0.10);
  font-family: "Quicksand", sans-serif;
  box-shadow: none;
}

.dark-mode .chip {
  background: var(--surface-alt);
  color: #fff;
  border-color: rgba(187,216,233,0.08);
}

/* ===========================
   PROJECT SWITCHER
=========================== */

.project-switcher {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 14px;
  padding: 1rem;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: 0 6px 18px var(--shadow);
  margin-bottom: 2.5rem;
}

.dark-mode .project-switcher {
  border-color: rgba(187,216,233,0.08);
  box-shadow:
    0 8px 22px rgba(0,0,0,0.24),
    inset 0 1px 0 rgba(187,216,233,0.025);
}

.project-nav-button {
  aspect-ratio: 1 / 1;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--accent);
  box-shadow: 0 6px 18px rgba(44,40,37,.28);
  transition:
    transform .28s cubic-bezier(.2,.8,.2,1),
    box-shadow .28s cubic-bezier(.2,.8,.2,1),
    background-color .24s ease,
    filter .24s ease;
}

.project-nav-button:hover {
  transform: scale(1.05);
  background: var(--accent-strong);
  filter: saturate(1.08);
}

.project-nav-button:active {
  transform: scale(.92);
}

.project-nav-button img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ===========================
   GALLERY AND SHOWCASE MEDIA
=========================== */

.responsive-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
  margin-top: 12px;
}

.responsive-gallery img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  max-height: 260px;
  box-shadow: 0 6px 18px rgba(44,40,37,.16);
  transition: transform .18s ease, box-shadow .18s ease;
}

.responsive-gallery img:hover {
  transform: scale(1.02);
  box-shadow: 0 14px 32px rgba(44,40,37,.24);
}

.showcase-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin: 1.2rem auto;
  box-shadow: 0 6px 18px var(--shadow);
  max-width: 900px;
}

.showcase-media,
.showcase-video {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(44,40,37,.18);
}

.showcase-media img,
.showcase-media video {
  width: 100%;
  display: block;
}

.showcase-video {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
}

.showcase-video iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.showcase-caption {
  margin-top: 8px;
  color: var(--text-muted);
  font-size: .9rem;
  text-align: center;
}

@media (max-width: 768px) {
  .project-switcher {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .responsive-gallery img {
    max-height: 200px;
  }
}

/* ===========================
   LIGHT MODE LIQUID GLASS BUTTONS
=========================== */

body:not(.dark-mode) .action-button,
body:not(.dark-mode) .preview-button,
body:not(.dark-mode) .back-link,
body:not(.dark-mode) .play-button,
body:not(.dark-mode) .back-to-top,
body:not(.dark-mode) .back-nav,
body:not(.dark-mode) #toggle-dark {
  background:
    linear-gradient(
      145deg,
      rgba(255,255,255,0.36),
      rgba(232,224,211,0.30)
    );

  border: 1px solid rgba(255,255,255,0.45);

  box-shadow:
    0 3px 8px rgba(44,40,37,0.12),
    0 12px 28px rgba(44,40,37,0.14),
    inset 0 1px 0 rgba(255,255,255,0.55),
    inset 0 -1px 0 rgba(44,40,37,0.08);

}

body:not(.dark-mode) .action-button:hover,
body:not(.dark-mode) .preview-button:hover,
body:not(.dark-mode) .back-link:hover,
body:not(.dark-mode) .play-button:hover,
body:not(.dark-mode) .cta-btn:hover,
body:not(.dark-mode) .back-to-top:hover,
body:not(.dark-mode) .back-nav:hover,
body:not(.dark-mode) #toggle-dark:hover {
  background:
    linear-gradient(
      145deg,
      rgba(255,255,255,0.48),
      rgba(232,224,211,0.38)
    );

  border-color: rgba(20,150,125,0.35);

  box-shadow:
    0 5px 12px rgba(44,40,37,0.15),
    0 16px 34px rgba(44,40,37,0.16),
    inset 0 1px 0 rgba(255,255,255,0.65),
    inset 0 -1px 0 rgba(44,40,37,0.07);
}

@media (min-width: 700px) {
  body:not(.dark-mode) .menu-links {
    background:
      linear-gradient(
        145deg,
        rgba(248,242,232,0.58),
        rgba(232,224,211,0.48)
      );

    border: 1px solid rgba(255,255,255,0.32);

    box-shadow:
      0 5px 14px rgba(44,40,37,0.12),
      0 16px 34px rgba(44,40,37,0.14),
      inset 0 1px 0 rgba(255,255,255,0.48);
  }

  body.dark-mode .menu-links {
    background: rgba(23,37,50,0.50);
    border: 1px solid rgba(187,216,233,0.08);
    box-shadow:
      0 8px 24px rgba(0,0,0,0.22),
      inset 0 1px 0 rgba(187,216,233,0.025);
  }

  body.dark-mode .menu-links a {
    border-color: rgba(187,216,233,0.08);
    background: rgba(32,54,71,0.36);
  }
}