/* ============================================================
   PROJECT DETAIL PAGE STYLES
   ============================================================ */

/* ---- PAGE BACKGROUND ---- */
body {
  background: var(--navy);
}

/* ---- BACK HOME BUTTON ---- */
.back-home-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  color: var(--gold, #c9a84c);
  font-family: 'Syne', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 14px 6px 10px;
  border: 1px solid rgba(201, 168, 76, 0.35);
  border-radius: 4px;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
  white-space: nowrap;
}

.back-home-btn:hover {
  background: rgba(201, 168, 76, 0.12);
  border-color: var(--gold, #c9a84c);
}

.back-arrow {
  font-size: 1rem;
  line-height: 1;
}

body.light-mode .back-home-btn {
  color: var(--navy, #1a2a4a);
  border-color: rgba(26, 42, 74, 0.35);
}

body.light-mode .back-home-btn:hover {
  background: rgba(26, 42, 74, 0.08);
  border-color: var(--navy, #1a2a4a);
}

/* ---- HERO / CAROUSEL SECTION ---- */
.project-hero {
  width: 100%;
  padding: 120px 0 60px;
  background: transparent;
  position: relative;
  isolation: isolate;
  overflow: hidden;
}

.project-hero__bg {
  position: absolute;
  inset: 0;
  background: url('imgs/rain_background.jpeg') center center / cover no-repeat;
  filter: brightness(0.65) saturate(0.9);
  z-index: 0;
  -webkit-mask-image: linear-gradient(to bottom,
      rgba(0, 0, 0, 1.00) 0%,
      rgba(0, 0, 0, 1.00) 55%,
      rgba(0, 0, 0, 0.55) 85%,
      rgba(0, 0, 0, 0.00) 100%);
          mask-image: linear-gradient(to bottom,
      rgba(0, 0, 0, 1.00) 0%,
      rgba(0, 0, 0, 1.00) 55%,
      rgba(0, 0, 0, 0.55) 85%,
      rgba(0, 0, 0, 0.00) 100%);
}

.project-hero > .carousel-container,
.project-hero > .project-navigation {
  position: relative;
  z-index: 1;
}

/* ---- TEXT CONTENT BACKDROP ---- */
.project-content {
  background: var(--navy, #0f1f35);
}


.carousel-container {
  position: relative;
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 24px;
}

.carousel-wrapper {
  position: relative;
  width: 100%;
  overflow: hidden;
  border-radius: 6px;
  aspect-ratio: 16 / 9;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(16px) saturate(130%);
  -webkit-backdrop-filter: blur(16px) saturate(130%);
  box-shadow: inset 0 1px 0 rgba(78, 179, 232, 0.08);
}

.carousel-track {
  display: flex;
  width: 100%;
  height: 100%;
  transition: transform 0.5s var(--ease-glass);
}

.carousel-slide {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--navy-mid) 0%, var(--navy) 100%);
  position: relative;
}

.carousel-slide img,
.carousel-slide video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.carousel-slide-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  font-family: 'DM Mono', monospace;
  font-size: 0.85rem;
  color: var(--text-secondary);
  background: linear-gradient(135deg, #1a5a8a 0%, var(--navy) 100%);
}

/* Carousel Arrows */
.carousel-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(45, 143, 206, 0.15);
  border: 1px solid var(--glass-border);
  border-radius: 2px;
  color: var(--blue-light);
  cursor: pointer;
  transition: background 0.3s, border-color 0.3s, transform 0.2s;
  z-index: 10;
}

.carousel-arrow:hover {
  background: rgba(45, 143, 206, 0.25);
  border-color: var(--blue-light);
  transform: translateY(-50%) scale(1.08);
}

.carousel-arrow--prev {
  left: 20px;
}

.carousel-arrow--next {
  right: 20px;
}

/* Hide arrows on mobile */
@media (max-width: 768px) {
  .carousel-arrow {
    display: none;
  }
}

/* Carousel Indicators */
.carousel-indicators {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 20px;
}

.carousel-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(78, 179, 232, 0.3);
  border: 1px solid var(--glass-border);
  cursor: pointer;
  transition: background 0.3s, border-color 0.3s, transform 0.2s;
}

.carousel-indicator.active {
  background: var(--blue-light);
  border-color: var(--blue-light);
}

.carousel-indicator:hover {
  background: var(--blue-bright);
  border-color: var(--blue-bright);
  transform: scale(1.2);
}

/* ---- PROJECT CONTENT SECTION ---- */
.project-detail-main {
  min-height: 100vh;
}

.project-content {
  padding: 80px 0;
  background: var(--navy, #0f1f35);
}

/* Back Button */
.back-button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: 'Syne', sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue-light);
  text-decoration: none;
  padding: 10px 16px;
  margin-bottom: 40px;
  border: 1px solid var(--glass-border);
  border-radius: 2px;
  background: transparent;
  cursor: pointer;
  transition: border-color 0.3s, color 0.3s, background 0.3s;
}

.back-button:hover {
  border-color: var(--blue-light);
  color: var(--blue-light);
  background: rgba(78, 179, 232, 0.08);
}

/* Project Header */
.project-header {
  margin-bottom: 60px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--glass-border);
}

.project-number {
  font-family: 'DM Mono', monospace;
  font-size: 0.70rem;
  letter-spacing: 0.18em;
  color: var(--blue-light);
  opacity: 0.7;
  margin-bottom: 16px;
}

.project-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--cream);
  margin-bottom: 24px;
}

.project-overview {
  font-family: 'Syne', sans-serif;
  font-size: clamp(0.95rem, 1.2vw, 1.1rem);
  line-height: 1.75;
  color: var(--text-secondary);
  max-width: 720px;
}

/* Section Subtitle */
.section-subtitle {
  font-family: 'Syne', sans-serif;
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--cream);
  margin-bottom: 28px;
}

/* Description Section */
.project-description {
  margin-bottom: 60px;
}

.description-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.description-content p {
  font-family: 'Syne', sans-serif;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.description-content strong {
  color: var(--cream);
}

/* Challenges Section */
.project-section {
  margin-bottom: 60px;
}

.challenges-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
}

.challenge-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 6px;
  padding: 28px;
  backdrop-filter: blur(16px) saturate(130%);
  -webkit-backdrop-filter: blur(16px) saturate(130%);
  transition: transform 0.3s var(--ease-glass), border-color 0.3s;
}

.challenge-item:hover {
  transform: translateY(-4px);
  border-color: rgba(78, 179, 232, 0.40);
}

.challenge-item h3 {
  font-family: 'Syne', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--blue-light);
  margin-bottom: 12px;
}

.challenge-item p {
  font-family: 'Syne', sans-serif;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* Tech Stack Section */
.project-tech-stack {
  margin-bottom: 60px;
}

.tech-stack-items {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tech-stack-tag {
  font-family: 'DM Mono', monospace;
  font-size: 0.73rem;
  letter-spacing: 0.10em;
  padding: 8px 16px;
  border: 1px solid var(--glass-border);
  border-radius: 2px;
  color: var(--blue-light);
  background: rgba(45, 143, 206, 0.1);
  transition: border-color 0.3s, background 0.3s, color 0.3s;
}

.tech-stack-tag:hover {
  border-color: var(--blue-bright);
  background: rgba(45, 143, 206, 0.18);
  color: var(--blue-bright);
}

/* Project Navigation (Prev/Next) */
.project-navigation {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 24px;
}

.nav-project-btn {
  display: flex !important;
  align-items: center;
  justify-content: space-between;
  padding: 24px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 6px;
  text-decoration: none;
  color: var(--cream);
  backdrop-filter: blur(16px) saturate(130%);
  -webkit-backdrop-filter: blur(16px) saturate(130%);
  transition: transform 0.3s var(--ease-glass), border-color 0.3s;
}

.nav-project-btn:hover {
  transform: translateX(var(--translate-x, 8px));
  border-color: rgba(78, 179, 232, 0.40);
}

.nav-project-btn--prev {
  --translate-x: -8px;
}

.nav-project-btn--prev:hover {
  --translate-x: -8px;
}

.nav-project-btn--next {
  --translate-x: 8px;
}

.nav-project-btn--next:hover {
  --translate-x: 8px;
}

.nav-arrow {
  font-size: 1.5rem;
  color: var(--blue-light);
  transition: color 0.3s;
}

.nav-project-btn:hover .nav-arrow {
  color: var(--blue-bright);
}

.nav-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.nav-title {
  font-family: 'Syne', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--cream);
}

.nav-project-btn--prev {
  flex-direction: row;
}

.nav-project-btn--next {
  flex-direction: row-reverse;
}

/* ============================================================
   RESPONSIVE DESIGN
   ============================================================ */

@media (max-width: 768px) {
  .project-hero {
    padding: 80px 0 40px;
  }

  .carousel-wrapper {
    aspect-ratio: 4 / 5;
  }

  .carousel-arrow {
    width: 40px;
    height: 40px;
  }

  .carousel-arrow--prev {
    left: 12px;
  }

  .carousel-arrow--next {
    right: 12px;
  }

  .project-content {
    padding: 60px 0;
  }

  .section-inner {
    padding: 0 20px;
  }

  .project-title {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
  }

  .project-header {
    margin-bottom: 40px;
    padding-bottom: 30px;
  }

  .project-description,
  .project-section,
  .project-tech-stack {
    margin-bottom: 40px;
  }

  .challenges-content {
    grid-template-columns: 1fr;
  }

  .nav-project-btn {
    padding: 14px 12px;
  }
}

@media (max-width: 480px) {
  .carousel-wrapper {
    aspect-ratio: 1 / 1.2;
  }

  .project-hero {
    padding: 70px 0 30px;
  }

  .carousel-container {
    padding: 0 16px;
  }

  .carousel-indicators {
    margin-top: 16px;
    gap: 8px;
  }

  .carousel-indicator {
    width: 8px;
    height: 8px;
  }

  .back-button {
    font-size: 0.72rem;
    margin-bottom: 30px;
  }

  .project-title {
    font-size: 1.8rem;
  }

  .project-overview {
    font-size: 0.95rem;
  }

  .section-subtitle {
    font-size: 1rem;
    margin-bottom: 20px;
  }

  .nav-project-btn {
    padding: 12px 10px;
  }

  .nav-label {
    font-size: 0.60rem;
  }

  .nav-title {
    font-size: 0.9rem;
  }
}

/* ============================================================
   MOBILE BACK BUTTON — project-detail page only
   Override styles.css which hides the entire navbar on mobile.
   Show only the back button as a floating overlay.
   ============================================================ */
@media (max-width: 768px) {
  .navbar {
    display: flex !important;
    position: fixed;
    top: 0;
    left: 0;
    width: auto;
    background: transparent;
    border: none;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    padding: 12px 16px;
    z-index: 200;
  }

  .navbar .nav-logo-wrapper {
    gap: 0;
  }

  /* Hide everything except the back button */
  .navbar .nav-logo,
  .navbar .logo-controls,
  .navbar .nav-links {
    display: none !important;
  }

  .navbar .back-home-btn {
    display: flex;
    padding: 10px 16px;
    font-size: 0.9rem;
  }
}

/* ============================================================
   DARK MODE / LIGHT MODE SUPPORT
   ============================================================ */

body.light-mode .carousel-wrapper {
  background: rgba(232, 224, 208, 0.08);
  border-color: rgba(45, 143, 206, 0.25);
}

body.light-mode .carousel-slide-placeholder {
  background: linear-gradient(135deg, #e8d5c4 0%, #f5ede0 100%);
  color: rgba(15, 31, 53, 0.6);
}

body.light-mode .carousel-arrow {
  background: rgba(45, 143, 206, 0.08);
  border-color: var(--blue-bright);
}

body.light-mode .carousel-arrow:hover {
  background: rgba(45, 143, 206, 0.15);
}

body.light-mode .project-header {
  border-color: rgba(45, 143, 206, 0.15);
}

body.light-mode .back-button {
  border-color: var(--blue-bright);
}

body.light-mode .back-button:hover {
  background: rgba(45, 143, 206, 0.1);
}

body.light-mode .challenge-item,
body.light-mode .nav-project-btn {
  background: rgba(232, 224, 208, 0.06);
  border-color: rgba(45, 143, 206, 0.15);
}

body.light-mode .project-hero__bg {
  filter: brightness(1.05) saturate(0.7) contrast(0.92);
}

body.light-mode .project-content {
  background: #d8d0c0;
}

body.light-mode .project-title,
body.light-mode .section-subtitle,
body.light-mode .nav-title {
  color: #0f1f35;
}

body.light-mode .tech-stack-tag {
  color: #1a5a8a;
  border-color: rgba(15, 31, 53, 0.15);
  background: rgba(26, 90, 138, 0.07);
}