* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --orange-50: #fff7ed;
    --orange-100: #ffedd5;
    --orange-200: #fed7aa;
    --orange-300: #fdba74;
    --orange-400: #fb923c;
    --orange-500: #f97316;
    --orange-600: #ea580c;
    --orange-700: #c2410c;
    --orange-800: #9a3412;
    --orange-900: #7c2d12;
    --blue-50: #eff6ff;
    --blue-100: #dbeafe;
    --blue-200: #bfdbfe;
    --blue-300: #93c5fd;
    --blue-400: #60a5fa;
    --blue-500: #3b82f6;
    --blue-600: #2563eb;
    --blue-700: #1d4ed8;
    --blue-800: #1e40af;
    --blue-900: #1e3a8a;
    --red-600: #dc2626;
    --red-700: #b91c1c;
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --slate-900: #0f172a;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    line-height: 1.6;
    color: var(--slate-700);
    background: linear-gradient(135deg, var(--slate-50) 0%, var(--orange-50) 50%, var(--blue-50) 100%);
    min-height: 100vh;
}

/* Navigation */
.navbar {
    position: fixed;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid var(--orange-100);
    transition: background-color 0.3s ease;
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.nav-back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--orange-600);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
}

.nav-back-btn:hover {
    background-color: var(--orange-50);
    transform: translateX(-5px);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: bold;
    background: linear-gradient(to right, var(--orange-600), var(--blue-600));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.icon-nav {
    width: 24px;
    height: 24px;
    color: var(--orange-600);
}

.nav-links {
    display: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--slate-700);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-link:hover {
    color: var(--orange-600);
}

.mobile-menu-btn {
    display: block;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--slate-700);
}

.mobile-menu {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: white;
    border-top: 1px solid var(--orange-100);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transform: translateY(-100%);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    z-index: 999;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
}

.mobile-menu.active {
    transform: translateY(0);
    opacity: 1;
}

.mobile-link {
    display: block;
    padding: 1rem 1.5rem;
    color: var(--slate-700);
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.3s;
}

.mobile-link:hover {
    background-color: var(--orange-50);
}

@media (min-width: 768px) {
    .nav-links { display: flex; }
    .mobile-menu-btn { display: none; }
    .mobile-menu { display: none; }
    .nav-brand { position: static; transform: none; }
}

/* Project Hero */
.project-hero {
    padding: 8rem 1rem 4rem;
    background: linear-gradient(135deg, var(--blue-50), var(--orange-50));
    border-bottom: 2px solid var(--orange-100);
}

.project-hero-content {
    max-width: 1280px;
    margin: 0 auto;
    text-align: center;
}

.project-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--orange-600), var(--red-600));
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 1.5rem;
}

.project-badge i { width: 20px; height: 20px; }

.project-hero-title {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: var(--slate-800);
    background: linear-gradient(to right, var(--orange-700), var(--blue-700));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@media (min-width: 768px) {
    .project-hero-title { font-size: 3.5rem; }
}

.project-hero-subtitle {
    font-size: 1.25rem;
    color: var(--slate-600);
    max-width: 48rem;
    margin: 0 auto 2rem;
    line-height: 1.6;
}

.project-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: center;
    align-items: center;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--slate-600);
    font-size: 0.95rem;
}

.meta-item i { width: 18px; height: 18px; color: var(--orange-600); }

/* Sections */
.section { padding: 5rem 1rem; }
.section-white { background-color: white; }
.container { max-width: 56rem; margin: 0 auto; }
.container-wide { max-width: 1280px; margin: 0 auto; }

.section-title {
    font-size: 2.5rem;
    font-weight: bold;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--slate-800);
}

/* Overview Section */
.overview-grid { display: grid; gap: 3rem; margin-bottom: 3rem; }
@media (min-width: 768px) { .overview-grid { grid-template-columns: 1fr 1fr; } }

.overview-image-container { position: relative; }

.overview-image {
    width: 100%; height: auto; border-radius: 1rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.image-caption {
    margin-top: 0.75rem; text-align: center; color: var(--slate-500);
    font-size: 0.9rem; font-style: italic;
}

.overview-content { display: flex; flex-direction: column; gap: 1.5rem; }

.overview-heading {
    font-size: 1.5rem; font-weight: 600; color: var(--orange-700); margin-bottom: 0.5rem;
}

.overview-text { color: var(--slate-600); line-height: 1.7; font-size: 1.05rem; }

.tech-stack {
    margin-top: 2rem; padding: 2rem;
    background: linear-gradient(135deg, var(--orange-50), var(--blue-50));
    border-radius: 1rem; border: 1px solid var(--orange-100);
}

.tech-stack-title {
    font-size: 1.5rem; font-weight: 600; color: var(--slate-800);
    margin-bottom: 1rem; text-align: center;
}

.tech-tags { display: flex; flex-wrap: wrap; gap: 0.75rem; justify-content: center; }

.tech-tag {
    padding: 0.5rem 1rem; background: white; border: 2px solid var(--orange-200);
    border-radius: 0.5rem; font-size: 0.9rem; color: var(--orange-700); font-weight: 600;
}

/* Detail Cards */
.detail-card {
    display: grid; gap: 2rem; margin-bottom: 3rem; padding: 2rem;
    background: white; border-radius: 1rem; box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    border: 2px solid var(--orange-100);
}

@media (min-width: 768px) {
    .detail-card { grid-template-columns: auto 1fr; align-items: start; }
    .detail-card-reverse { grid-template-columns: 1fr auto; }
    .detail-card-reverse .detail-icon-container { order: 2; }
    .detail-card-reverse .detail-content { order: 1; }
}

.detail-icon-container {
    display: flex; align-items: center; justify-content: center;
    width: 80px; height: 80px; background: linear-gradient(135deg, var(--orange-600), var(--red-600));
    border-radius: 1rem; flex-shrink: 0; margin: 0 auto;
}

.detail-icon { width: 40px; height: 40px; color: white; }

.detail-title { font-size: 1.75rem; font-weight: 600; color: var(--slate-800); margin-bottom: 1rem; }

.detail-text { color: var(--slate-600); line-height: 1.7; font-size: 1.05rem; margin-bottom: 1rem; }

.detail-list { list-style: none; padding: 0; }
.detail-list li {
    padding-left: 1.5rem; margin-bottom: 0.75rem; position: relative; color: var(--slate-600); line-height: 1.6;
}
.detail-list li::before { content: "→"; position: absolute; left: 0; color: var(--orange-600); font-weight: bold; }

/* Centered media helper */
.centered-media { text-align: center; margin-top: 1rem; }
.centered-media img {
    max-width: 100%; height: auto; border-radius: 0.75rem; box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}
.centered-media .image-caption { margin-top: 0.5rem; color: var(--slate-500); font-size: 0.9rem; }

/* Optional vertical stack utility */
.stack-vertical > .stack-item { margin-bottom: 1rem; }
.stack-vertical > .stack-item:last-child { margin-bottom: 0; }

/* Specifications Section */
.specs-grid { display: grid; gap: 1.5rem; margin-bottom: 3rem; }
@media (min-width: 640px) { .specs-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .specs-grid { grid-template-columns: repeat(4, 1fr); } }

.spec-card {
    background: white; border-radius: 1rem; padding: 1.5rem; border: 2px solid var(--orange-100); transition: all 0.3s;
}
.spec-card:hover { border-color: var(--orange-300); transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0,0,0,0.1); }

.spec-header {
    display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1rem; padding-bottom: 1rem; border-bottom: 2px solid var(--orange-100);
}
.spec-header i { width: 24px; height: 24px; color: var(--orange-600); }
.spec-header h3 { font-size: 1.1rem; font-weight: 600; color: var(--slate-800); }

.spec-content p { margin-bottom: 0.5rem; color: var(--slate-600); font-size: 0.95rem; line-height: 1.6; }
.spec-content strong { color: var(--slate-800); font-weight: 600; }

/* Diagram Section */
.diagram-section { margin-top: 3rem; }
.diagram-title { font-size: 1.75rem; font-weight: 600; color: var(--slate-800); margin-bottom: 1.5rem; text-align: center; }
.diagram-placeholder {
    background: linear-gradient(135deg, var(--slate-50), var(--blue-50));
    border: 2px dashed var(--orange-300); border-radius: 1rem; padding: 4rem 2rem; text-align: center; color: var(--slate-500);
}
.diagram-placeholder i { width: 64px; height: 64px; margin-bottom: 1rem; color: var(--orange-400); }
.diagram-placeholder p { font-size: 1.1rem; }

/* Results Section */
.results-highlight { display: grid; gap: 1.5rem; margin-bottom: 3rem; }
@media (min-width: 640px) { .results-highlight { grid-template-columns: repeat(3, 1fr); } }

.highlight-card {
    background: linear-gradient(135deg, var(--orange-600), var(--red-600));
    border-radius: 1rem; padding: 2rem; text-align: center; color: white;
    box-shadow: 0 10px 25px rgba(234, 88, 12, 0.3);
}
.highlight-number { font-size: 3rem; font-weight: bold; margin-bottom: 0.5rem; }
.highlight-label { font-size: 1.1rem; opacity: 0.95; }

.results-content { background: white; padding: 2.5rem; border-radius: 1rem; border: 2px solid var(--orange-100); }
.results-heading { font-size: 1.75rem; font-weight: 600; color: var(--orange-700); margin: 1.5rem 0; }
.results-heading:first-child { margin-top: 0; }
.results-text { color: var(--slate-600); line-height: 1.7; font-size: 1.05rem; margin-bottom: 1.5rem; }

.achievement-grid { display: grid; gap: 1.5rem; margin-bottom: 2rem; }
@media (min-width: 768px) { .achievement-grid { grid-template-columns: repeat(2, 1fr); } }
.achievement-item { display: flex; gap: 1rem; padding: 1.5rem; background: var(--orange-50); border-radius: 0.75rem; border: 1px solid var(--orange-200); }
.achievement-icon { width: 24px; height: 24px; color: var(--orange-600); flex-shrink: 0; }
.achievement-text h4 { font-size: 1.1rem; font-weight: 600; color: var(--slate-800); margin-bottom: 0.25rem; }
.achievement-text p { color: var(--slate-600); font-size: 0.95rem; line-height: 1.5; }

/* Gallery Section */
.gallery-grid { display: grid; gap: 2rem; }
@media (min-width: 640px) { .gallery-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .gallery-grid { grid-template-columns: repeat(4, 1fr); } }
.gallery-item {
    position: relative; border-radius: 1rem; overflow: hidden; box-shadow: 0 4px 12px rgba(0,0,0,0.1); transition: transform 0.3s;
}
.gallery-item:hover { transform: scale(1.05); }
.gallery-item img { width: 100%; height: 250px; object-fit: cover; display: block; }
.gallery-caption { padding: 1rem; background: white; text-align: center; color: var(--slate-600); font-size: 0.9rem; }

/* Footer */
.footer { padding: 2rem 1rem; border-top: 1px solid var(--orange-100); background: white; }
.footer-content {
    max-width: 1280px; margin: 0 auto; text-align: center; color: var(--slate-600);
    display: flex; align-items: center; justify-content: center; gap: 0.5rem; flex-wrap: wrap;
}
.icon-footer { width: 16px; height: 16px; color: var(--orange-600); }

/* Responsive adjustments */
@media (max-width: 767px) {
    .project-hero { padding: 6rem 1rem 3rem; }
    .project-hero-title { font-size: 2rem; }
    .section { padding: 3rem 1rem; }
    .section-title { font-size: 2rem; }
    .detail-card { padding: 1.5rem; }
    .results-content { padding: 1.5rem; }
}

/* Ensure absolute centering is relative to the bar, not the page */
.nav-container { position: relative; }

/* On small screens, hide the brand text but keep the icon */
@media (max-width: 767px) { .nav-brand { display: none; } }

/* =========================
   STANDARDIZED CONTACT CTA
   ========================= */
.contact-section {
  position: relative;
  background: linear-gradient(
    135deg,
    var(--orange-600) 0%,
    var(--red-600) 35%,
    var(--blue-600) 80%,
    var(--blue-700) 100%
  );
  overflow: hidden;
  text-align: center;
}
.contact-glow {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 25% 60%, rgba(251,146,60,0.35) 0%, transparent 55%),
    radial-gradient(circle at 75% 40%, rgba(59,130,246,0.35) 0%, transparent 55%);
  pointer-events: none;
  animation: glow-pulse 4s ease-in-out infinite;
}
@keyframes glow-pulse { 0%,100%{opacity:.6} 50%{opacity:1} }

.contact-container { position: relative; z-index: 1; }

.contact-title {
  color: #fff;
  font-size: 2.6rem;
  font-weight: 800;
  text-shadow: 0 4px 12px rgba(0,0,0,.25);
  margin-bottom: .5rem;
}

.contact-subtitle {
  color: rgba(255,255,255,.95);
  font-size: 1.15rem;
  margin: 0 auto 1.25rem;
  max-width: 52rem;
  text-shadow: 0 2px 8px rgba(0,0,0,.2);
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: stretch;
}
@media (min-width: 640px) {
  .contact-links { flex-direction: row; justify-content: center; align-items: center; }
}

.contact-card {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .75rem;
  background: #fff;
  padding: 1rem 2rem;
  border-radius: .75rem;
  border: 3px solid #fff;
  text-decoration: none;
  color: var(--slate-700);
  font-weight: 700;
  font-size: 1.125rem;
  transition: transform .25s ease, border-color .25s ease, background-color .25s ease, box-shadow .25s ease;
  box-shadow: 0 12px 28px rgba(0,0,0,.28);
}
.contact-card:hover {
  transform: scale(1.06) translateY(-3px);
  border-color: var(--orange-400);
  background: var(--orange-50);
  box-shadow: 0 18px 38px rgba(0,0,0,.35);
}

.icon-contact { width: 22px; height: 22px; color: var(--orange-600); }

/* Keep your existing secondary button (used alongside contact cards) */
.btn-cta-secondary{
  display:inline-flex;align-items:center;gap:.5rem;padding:1rem 2rem;border-radius:.75rem;font-weight:700;
  text-decoration:none;transition:.3s;font-size:1.05rem;background:transparent;color:#fff;border:2px solid #fff;
}
.btn-cta-secondary:hover{background:rgba(255,255,255,.1);transform:scale(1.05);}

/* Copy-to-Clipboard Toast */
.toast{
  position:fixed;left:50%;bottom:-60px;transform:translateX(-50%);
  background:#111827;color:#fff;padding:.6rem 1rem;border-radius:.5rem;
  box-shadow:0 10px 25px rgba(0,0,0,.35);font-size:.95rem;z-index:1100;
  opacity:0;transition:transform .35s ease, opacity .35s ease, bottom .35s ease;
}
.toast.show{bottom:18px;opacity:1}