/* ============================================================
   PAGE HERO
============================================================ */
.proj-hero {
  padding-top: calc(var(--nav-h) + 3rem);
  padding-bottom: 3rem;
  position: relative;
  z-index: 1;
}

.proj-hero-title {
  font-size: clamp(3rem, 10vw, 7rem);
  font-weight: 800;
  line-height: 0.9;
  letter-spacing: -0.055em;
  margin: 0.5rem 0 1.25rem;
}

.outline {
  -webkit-text-stroke: 2px var(--text-1);
  color: transparent;
}

.proj-hero-sub {
  font-size: 0.95rem;
  color: var(--text-2);
  max-width: 500px;
  line-height: 1.8;
}

/* ============================================================
   FILTER BAR
============================================================ */
.filter-bar {
  border-top: 1px solid var(--border-md);
  border-bottom: 1px solid var(--border-md);
  background: var(--bg-surface);
  padding: 0.7rem 0;
  transition: background 0.4s ease;
  position: relative;
  z-index: 100;
}

.sticky-filter {
  position: sticky;
  top: var(--nav-h);
  z-index: 100;
}

.filter-inner {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.filter-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-3);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-right: 0.35rem;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 5px 13px;
  border-radius: 100px;
  border: 1px solid var(--border-md);
  background: transparent;
  color: var(--text-2);
  cursor: pointer;
  letter-spacing: 0.03em;
  transition: all var(--t);
}

.filter-btn:hover { color: var(--text-1); border-color: var(--border-str); }

.filter-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* ============================================================
   PROJECT LIST
============================================================ */
.proj-list {
  padding: 2.75rem 0;
  position: relative;
  z-index: 1;
}

.proj-item {
  margin-bottom: 2.2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--t), box-shadow 0.4s ease, background 0.4s ease;
  cursor: default;
}

.proj-item:hover {
  border-color: var(--border-str);
  box-shadow: 0 16px 48px rgba(0,0,0,0.06);
}

/* Mobile: stack media on top, content below */
.proj-item-inner {
  display: flex;
  flex-direction: column;
}

/* Media / diagram side */
.proj-media {
  background: var(--bg-surface);
  transition: background 0.4s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.2rem;
  border-bottom: 1px solid var(--border);
  min-height: 150px;
  position: relative;
}

/* ============================================================
   PROJECT DIAGRAM VISUALS
============================================================ */
.proj-img-placeholder {
  width: 100%;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  border-radius: var(--radius-sm);
  position: relative;
  overflow: hidden;
}

/* Real photo overlay — add image file to show it; hides via onerror if file missing */
.proj-photo-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-sm);
  z-index: 2;
}

.pv-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
}

.pv-row {
  display: flex;
  gap: 5px;
  align-items: center;
}

.pv-box {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.04em;
  padding: 6px 12px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-str);
  background: var(--bg-card);
  color: var(--text-2);
  white-space: nowrap;
  transition: background 0.4s ease;
}

.pv-small { padding: 4px 9px; font-size: 0.6rem; }

.pv-arrow {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-3);
  letter-spacing: 0.04em;
}

.pv-arrow-v { font-size: 0.75rem; }

.pv-nginx, .pv-server  { border-color: var(--accent-mid); color: var(--accent); background: var(--accent-light); }
.pv-docker             { border-color: #93c5fd; color: #1d4ed8; background: #eff6ff; }
.pv-mqtt               { border-color: #c4b5fd; color: #6d28d9; background: #f5f3ff; }
.pv-internet           { border-color: var(--border-str); }

[data-theme="dark"] .pv-docker { border-color: #1e3a5f; color: #93c5fd; background: #0a1628; }
[data-theme="dark"] .pv-mqtt   { border-color: #2d1f4a; color: #c4b5fd; background: #1a1030; }

.pv-stack {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-align: center;
}

/* Background tints per project */
.pv-aws   { background: linear-gradient(145deg, var(--accent-light), var(--bg-surface)); }
.pv-net   { background: linear-gradient(145deg, #eff6ff, #e0e7f0); }
.pv-linux { background: linear-gradient(145deg, #fef9ec, #f5edd8); }
.pv-proxy { background: linear-gradient(145deg, #f3f0fb, #e8e2f5); }
.pv-iot   { background: linear-gradient(145deg, #f5f3ff, #ede8f8); }
.pv-web   { background: linear-gradient(145deg, #fff0f3, #f8e2ea); }

[data-theme="dark"] .pv-net   { background: linear-gradient(145deg, #0a1628, #161e2e); }
[data-theme="dark"] .pv-linux { background: linear-gradient(145deg, #1f1900, #2a2200); }
[data-theme="dark"] .pv-proxy { background: linear-gradient(145deg, #160d24, #1f1530); }
[data-theme="dark"] .pv-iot   { background: linear-gradient(145deg, #130d20, #1c1530); }
[data-theme="dark"] .pv-web   { background: linear-gradient(145deg, #1f0d12, #2c1520); }

/* ============================================================
   PROJECT CONTENT
============================================================ */
.proj-content {
  padding: 1.3rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  justify-content: center;
}

.proj-meta {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.proj-num {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-3);
  letter-spacing: 0.07em;
  margin-right: 1px;
}

.proj-badge {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  padding: 3px 9px;
  border-radius: 100px;
  letter-spacing: 0.03em;
}

.badge-personal { background: var(--accent-light); border: 1px solid var(--accent-mid); color: var(--accent); }
.badge-infra    { background: var(--bg-surface); border: 1px solid var(--border-md); color: var(--text-3); }
.badge-skil2    { background: #eff6ff; border: 1px solid #93c5fd; color: #1d4ed8; }
.badge-wip      { background: #fefce8; border: 1px solid #fde047; color: #854d0e; }
.badge-foundation { background: #fff0f3; border: 1px solid #fbb6ce; color: #9d174d; }
.badge-progress { background: var(--bg-card); border: 1px solid var(--border-md); color: var(--text-2); }

[data-theme="dark"] .badge-skil2     { background: #0a1628; border-color: #1e3a5f; color: #93c5fd; }
[data-theme="dark"] .badge-wip       { background: #1c1500; border-color: #4a3800; color: #facc15; }
[data-theme="dark"] .badge-foundation { background: #200d12; border-color: #4a1825; color: #f9a8d4; }

.proj-title {
  font-size: clamp(1.2rem, 3.3vw, 1.7rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.15;
}

.proj-item-primary .proj-title {
  font-size: clamp(1.28rem, 3.5vw, 1.85rem);
}

.proj-item-primary .proj-content {
  gap: 1rem;
}

.proj-item-primary {
  margin-bottom: 2.35rem;
}

.proj-item-secondary .proj-title {
  font-size: clamp(1.08rem, 2.9vw, 1.45rem);
  letter-spacing: -0.03em;
}

.proj-item-secondary .proj-content {
  gap: 0.75rem;
}

.proj-block { display: flex; flex-direction: column; gap: 3px; }

.proj-block-label {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.proj-text {
  font-size: 0.82rem;
  color: var(--text-2);
  line-height: 1.66;
}

.proj-text code {
  font-family: var(--font-mono);
  font-size: 0.82em;
  background: var(--bg-surface);
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--accent);
}

.proj-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: 0.2rem;
}

.proj-skills span {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  padding: 3px 9px;
  border-radius: 100px;
  background: var(--bg-surface);
  border: 1px solid var(--border-md);
  color: var(--text-3);
  letter-spacing: 0.04em;
  transition: border-color var(--t), color var(--t), background 0.4s ease;
}

.proj-skills span:hover {
  border-color: var(--accent-mid);
  color: var(--accent);
  background: var(--accent-light);
}

.proj-links {
  display: flex;
  gap: 0.65rem;
  flex-wrap: wrap;
  margin-top: 0.2rem;
}

/* ============================================================
   SKILLS DEVELOPED BLOCK
============================================================ */
.proj-skills-developed {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-top: 2px;
}

.psd-row {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.psd-label {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
}

.psd-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.psd-tag-tech {
  font-family: var(--font-mono);
  font-size: 0.59rem;
  padding: 2px 8px;
  border-radius: 100px;
  background: var(--accent-light);
  border: 1px solid var(--accent-mid);
  color: var(--accent);
  letter-spacing: 0.03em;
  transition: background 0.4s ease;
}

.psd-tag-soft {
  font-family: var(--font-mono);
  font-size: 0.59rem;
  padding: 2px 8px;
  border-radius: 100px;
  background: var(--bg-surface);
  border: 1px solid var(--border-md);
  color: var(--text-2);
  letter-spacing: 0.03em;
  transition: background 0.4s ease;
}

/* Filter count badge */
.filter-count {
  font-family: var(--font-mono);
  font-size: 0.6em;
  opacity: 0.7;
  margin-left: 2px;
}

/* ============================================================
   CTA
============================================================ */
.proj-cta {
  padding: 4rem 0;
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 1;
}

.cta-inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-md);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  transition: background 0.4s ease;
}

.cta-inner h2 {
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  margin-bottom: 0.35rem;
}

.cta-inner > div > p {
  font-size: 0.9rem;
  color: var(--text-2);
}

.cta-btns {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  flex-shrink: 0;
}

/* ============================================================
   RESPONSIVE — PROGRESSIVE ENHANCEMENT
============================================================ */

@media (min-width: 600px) {
  .cta-btns { flex-direction: row; flex-wrap: wrap; }
  .proj-skills-developed { flex-direction: row; gap: 1rem; }
  .psd-row { flex: 1; }
}

@media (min-width: 768px) {
  .proj-item-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 360px;
  }

  /* Flip layout for alternating items */
  .proj-item-flip {
    direction: rtl;
  }
  .proj-item-flip > * { direction: ltr; }

  .proj-media {
    border-bottom: none;
    border-right: 1px solid var(--border);
    min-height: unset;
    padding: 1.45rem;
  }

  .proj-item-flip .proj-media {
    border-right: none;
    border-left: 1px solid var(--border);
  }

  .proj-img-placeholder { min-height: 240px; }

  .proj-content { padding: 1.55rem 1.8rem; }

  .proj-item-primary .proj-content { padding: 1.75rem 2rem; }
  .proj-item-secondary .proj-content { padding: 1.5rem 1.75rem; }

  .cta-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding: 2.5rem;
  }
}

@media (min-width: 1024px) {
  .proj-item-inner { min-height: 410px; }
  .proj-media { padding: 1.55rem; }
  .proj-img-placeholder { min-height: 275px; }
  .proj-content { padding: 1.95rem 2.4rem; }
  .proj-item-primary .proj-content { padding: 2.2rem 2.55rem; }
  .proj-item-secondary .proj-content { padding: 1.8rem 2.2rem; }
  .cta-inner { padding: 3rem 3.5rem; }
}

/* ============================================================
   CAROUSEL (desktop / tablet ≥ 768px, activated via JS)
============================================================ */

.proj-list.carousel-mode .proj-item {
  display: none;
  margin-bottom: 0;
}
.proj-list.carousel-mode .proj-item.carousel-active {
  display: block;
}
.proj-list.carousel-mode {
  padding-bottom: 1rem;
}

.carousel-stage {
  position: relative;
}

.carousel-side-btn {
  display: none;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  padding: 0;
  color: var(--text-3);
  cursor: pointer;
  opacity: 0.82;
  transition: color 0.2s ease, opacity 0.2s ease, transform 0.2s ease;
  z-index: 3;
}

.carousel-side-btn.carousel-prev { left: -22px; }
.carousel-side-btn.carousel-next { right: -22px; }

.proj-list.carousel-mode .carousel-side-btn {
  display: inline-flex;
}

.carousel-side-btn:hover:not(:disabled) {
  color: var(--text-1);
  opacity: 1;
  transform: translateY(-50%) scale(1.06);
}

.carousel-side-btn:disabled {
  opacity: 0.2;
  cursor: default;
  pointer-events: none;
}

/* --- Keyframes --- */

@keyframes c-media-fwd {
  from { opacity: 0; transform: translateX(-28px) scale(0.97); filter: blur(6px); }
  to   { opacity: 1; transform: translateX(0)     scale(1);    filter: blur(0);  }
}
@keyframes c-media-back {
  from { opacity: 0; transform: translateX(28px)  scale(0.97); filter: blur(6px); }
  to   { opacity: 1; transform: translateX(0)     scale(1);    filter: blur(0);  }
}
@keyframes c-content-in {
  from { opacity: 0; transform: translateY(18px); filter: blur(5px); }
  to   { opacity: 1; transform: translateY(0);    filter: blur(0);   }
}

.proj-list.carousel-mode .proj-item.carousel-dir-fwd  .proj-media {
  animation: c-media-fwd  0.72s cubic-bezier(0.16, 1, 0.3, 1) both;
}
.proj-list.carousel-mode .proj-item.carousel-dir-back .proj-media {
  animation: c-media-back 0.72s cubic-bezier(0.16, 1, 0.3, 1) both;
}

/* Content children cascade in with stagger */
.proj-list.carousel-mode .proj-item.carousel-active .proj-content > * {
  animation: c-content-in 0.52s cubic-bezier(0.16, 1, 0.3, 1) both;
}
.proj-list.carousel-mode .proj-item.carousel-active .proj-content > *:nth-child(1) { animation-delay: 0.06s; }
.proj-list.carousel-mode .proj-item.carousel-active .proj-content > *:nth-child(2) { animation-delay: 0.13s; }
.proj-list.carousel-mode .proj-item.carousel-active .proj-content > *:nth-child(3) { animation-delay: 0.20s; }
.proj-list.carousel-mode .proj-item.carousel-active .proj-content > *:nth-child(4) { animation-delay: 0.27s; }
.proj-list.carousel-mode .proj-item.carousel-active .proj-content > *:nth-child(5) { animation-delay: 0.34s; }
.proj-list.carousel-mode .proj-item.carousel-active .proj-content > *:nth-child(6) { animation-delay: 0.41s; }
.proj-list.carousel-mode .proj-item.carousel-active .proj-content > *:nth-child(7) { animation-delay: 0.47s; }
.proj-list.carousel-mode .proj-item.carousel-active .proj-content > *:nth-child(8) { animation-delay: 0.53s; }

/* --- Controls --- */

.carousel-controls {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 1.75rem 0 0.5rem;
}

/* Bare-icon arrow buttons — no background, no border ring */
.carousel-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  background: none;
  border: none;
  padding: 0;
  color: var(--text-3);
  cursor: pointer;
  transition: color 0.2s ease, opacity 0.2s ease;
}
.carousel-btn:hover:not(:disabled) { color: var(--text-1); }
.carousel-btn:disabled { opacity: 0.18; cursor: default; pointer-events: none; }

/* Slide counter numbers */
.carousel-current,
.carousel-total {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  flex-shrink: 0;
  min-width: 2ch;
  line-height: 1;
  user-select: none;
  transition: color 0.3s ease;
}
.carousel-current { color: var(--text-1); }
.carousel-total   { color: var(--text-3); }

/* Progress track */
.carousel-progress-wrap {
  flex: 1;
  height: 28px;
  display: flex;
  align-items: center;
  cursor: pointer;
}
.carousel-progress-wrap:hover .carousel-progress-track { opacity: 0.7; }

.carousel-progress-track {
  position: relative;
  width: 100%;
  height: 1px;
  background: var(--border-md);
  border-radius: 100px;
  transition: opacity 0.2s ease;
}

.carousel-progress-fill {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  background: var(--accent);
  border-radius: 100px;
  width: 0%;
  transition: width 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Handle dot at the leading edge */
.carousel-progress-fill::after {
  content: '';
  position: absolute;
  right: -3px;
  top: 50%;
  transform: translateY(-50%) scale(1);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.carousel-progress-wrap:hover .carousel-progress-fill::after {
  transform: translateY(-50%) scale(1.6);
}

@media (max-width: 767px) {
  .carousel-side-btn {
    display: none !important;
  }
}