/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:          #111111;
  --bg-raised:   #1a1a1a;
  --bg-subtle:   #222222;
  --text:        #f0ece4;
  --text-muted:  #a09a90;
  --border:      #2e2e2e;
  --accent:      #e8e0d0;
  --accent-dim:  #9e9690;
  --font-serif:  'EB Garamond', Georgia, serif;
  --font-sans:   -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --nav-h:       64px;
  --max-w:       1100px;
  --radius:      12px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ── Nav ── */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  background: rgba(17, 17, 17, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--text);
  transition: opacity 0.2s;
}
.nav-logo:hover { opacity: 0.75; }

.nav-links {
  display: flex;
  gap: 2rem;
}
.nav-links a {
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color 0.2s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--text); }

/* ── Main ── */
.site-main {
  flex: 1;
  padding-top: var(--nav-h);
}

/* ── Hero ── */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: max(400px, calc(100vh - var(--nav-h) - 100px));
  padding: 4rem 2rem;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(3.5rem, 10vw, 8rem);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.05;
  color: var(--text);
}

.hero-subtitle {
  margin-top: 1.25rem;
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

/* ── Portfolio rows ── */
.portfolio {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 4rem 2rem 6rem;
  display: flex;
  flex-direction: column;
  gap: 7rem;
  position: relative;
}

/* Scroll progress line — runs down the vertical center of the section */
.portfolio-line {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  transform: translateX(-50%);
  background: var(--border);
  pointer-events: none;
  overflow: hidden;
}

.portfolio-line__fill {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0%;
  background: linear-gradient(to bottom, transparent, var(--accent-dim) 10%, var(--accent) 50%, var(--accent-dim) 90%, transparent);
  transition: height 0.05s linear;
}

@media (max-width: 768px) {
  .portfolio-line { display: none; }
}

.app-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.app-row--reverse {
  direction: rtl;
}
.app-row--reverse > * {
  direction: ltr;
}

/* ── Device Frames ── */
.device-frame {
  position: relative;
  width: 100%;
}

/* Browser frame */
.device-frame--browser {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.04),
    0 20px 60px rgba(0,0,0,0.6),
    0 4px 16px rgba(0,0,0,0.4);
}

.device-frame__chrome {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border);
}

.chrome-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border);
  flex-shrink: 0;
}

.chrome-bar {
  flex: 1;
  height: 22px;
  background: var(--bg-raised);
  border-radius: 4px;
  border: 1px solid var(--border);
  margin-left: 8px;
}

.device-frame--browser .device-frame__screen {
  aspect-ratio: 1 / 1;
  overflow: hidden;
  position: relative;
}

.device-frame--browser .device-frame__screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  filter: brightness(0.95);
  transition: filter 0.3s, transform 0.4s;
}

.device-frame--browser:hover .device-frame__screen img {
  filter: brightness(1);
  transform: scale(1.02);
}

/* Mobile frame */
.device-frame--mobile {
  display: flex;
  justify-content: center;
}

.device-frame--mobile .device-inner {
  position: relative;
  width: min(220px, 60%);
}

/* We build the phone with pure CSS */
.device-frame--mobile .device-frame__screen {
  position: relative;
  width: min(220px, 60%);
  margin: 0 auto;
  aspect-ratio: 9 / 19.5;
  background: var(--bg-subtle);
  border-radius: 36px;
  border: 2px solid #333;
  overflow: hidden;
  box-shadow:
    0 0 0 6px #1e1e1e,
    0 0 0 7px #2a2a2a,
    0 20px 60px rgba(0,0,0,0.7),
    0 4px 16px rgba(0,0,0,0.5);
}

.device-frame--mobile .device-frame__screen::before {
  content: '';
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 6px;
  background: #2a2a2a;
  border-radius: 3px;
  z-index: 2;
}

.device-frame--mobile .device-frame__screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  padding-top: 24px;
  filter: brightness(0.95);
  transition: filter 0.3s;
}

.device-frame--mobile:hover .device-frame__screen img {
  filter: brightness(1);
}

.placeholder-screen {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--bg-subtle) 0%, #1e1e1e 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── App info ── */
.app-row__info {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.app-title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 400;
  line-height: 1.2;
  color: var(--text);
}

.app-tagline {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-dim);
}

.app-overview {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.75;
}

/* ── Buttons ── */
.app-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: background 0.2s, color 0.2s, opacity 0.2s, transform 0.15s;
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--accent);
  color: #111;
}
.btn--primary:hover { background: #fff; }

.btn--store {
  background: var(--bg-raised);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn--store:hover {
  background: var(--bg-subtle);
  border-color: var(--accent-dim);
}
.btn--store svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.btn--outline {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn--outline:hover {
  color: var(--text);
  border-color: var(--accent-dim);
}

/* ── App Detail Page ── */
.app-detail {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 4rem 2rem 6rem;
}

.app-detail__header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
  margin-bottom: 5rem;
}

.device-frame--large.device-frame--browser .device-frame__screen {
  height: 400px;
}

.app-detail__meta {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding-top: 1rem;
}

.app-detail__meta h1 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  line-height: 1.15;
}

.app-detail__body {
  max-width: 720px;
  border-top: 1px solid var(--border);
  padding-top: 3rem;
}

/* ── Prose (app detail body content) ── */
.prose h2, .prose h3 {
  font-family: var(--font-serif);
  font-weight: 400;
  color: var(--text);
  margin: 2rem 0 0.75rem;
}
.prose h2 { font-size: 1.75rem; }
.prose h3 { font-size: 1.35rem; }
.prose p { color: var(--text-muted); margin-bottom: 1.25rem; }
.prose ul, .prose ol {
  color: var(--text-muted);
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: 0.4rem; }
.prose a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.prose strong { color: var(--text); font-weight: 600; }

/* ── Slideshow ── */
.slideshow {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.slideshow__slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: translateX(100%);
  transition: opacity 0.4s ease, transform 0.4s ease;
  pointer-events: none;
}

.slideshow__slide.is-active {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

.slideshow__slide.is-leaving {
  opacity: 0;
  transform: translateX(-100%);
  pointer-events: none;
}

.slideshow__slide.is-leaving-prev {
  opacity: 0;
  transform: translateX(100%);
  pointer-events: none;
}

.slideshow__slide.is-entering-prev {
  transform: translateX(-100%);
}

.slideshow__slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
}

.slideshow__btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  background: rgba(17, 17, 17, 0.6);
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  font-size: 1.4rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  transition: background 0.2s, opacity 0.2s;
  opacity: 0;
  padding: 0 0 4px 0;
}

.slideshow:hover .slideshow__btn {
  opacity: 1;
}

.slideshow__btn--prev { left: 8px; }
.slideshow__btn--next { right: 8px; }

.slideshow__btn:hover {
  background: rgba(17, 17, 17, 0.85);
}

.slideshow__dots {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 6px;
  z-index: 10;
  opacity: 0;
  transition: opacity 0.2s;
}

.slideshow:hover .slideshow__dots {
  opacity: 1;
}

.slideshow__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255,255,255,0.35);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: background 0.2s, transform 0.2s;
}

.slideshow__dot.is-active {
  background: var(--text);
  transform: scale(1.3);
}

/* ── Contact Page ── */
.contact-page {
  max-width: 800px;
  margin: 0 auto;
  padding: 5rem 2rem 6rem;
}

.contact-page h1 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  margin-bottom: 1rem;
}

.contact-page .lead {
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-bottom: 2.5rem;
}

.contact-embed {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-raised);
}

.contact-embed iframe {
  display: block;
  width: 100%;
  border: none;
}

.contact-placeholder {
  padding: 4rem 2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ── Footer ── */
.site-footer {
  padding: 2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
  letter-spacing: 0.04em;
}

/* ── Hamburger button (hidden on desktop) ── */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 4px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 101;
}
.nav-toggle span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
  transform-origin: center;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .site-nav { padding: 0 1.25rem; }

  .nav-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(17, 17, 17, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.35s ease;
  }
  .nav-links.is-open {
    max-height: 240px;
  }
  .nav-links li {
    border-top: 1px solid var(--border);
  }
  .nav-links a {
    display: block;
    padding: 1rem 1.5rem;
    font-size: 0.9rem;
  }

  .app-row,
  .app-row--reverse {
    grid-template-columns: 1fr;
    direction: ltr;
    gap: 2rem;
  }

  .app-detail__header {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .portfolio { gap: 5rem; padding: 3rem 1.25rem 5rem; }

  .device-frame--mobile .device-frame__screen {
    width: min(180px, 55%);
  }

  .hero { min-height: max(300px, calc(100vh - var(--nav-h) - 170px)); }
}

@media (max-width: 480px) {
  .btn { font-size: 0.8rem; padding: 0.5rem 1rem; }
  .nav-links { gap: 1.25rem; }
  .nav-links a { font-size: 0.8rem; }
}