:root {
  --bg-0: #ffffff;
  --bg-1: #f5f9ff;
  --bg-2: #eef5ff;
  --bg-3: #e6f0ff;
  --text: rgba(0, 0, 0, 0.88);
  --text-muted: rgba(0, 0, 0, 0.6);
  --accent: #1677ff;
  --accent-hover: #4096ff;
  --border: #d9d9d9;
  --card-1: #e6f4ff;
  --card-2: #e8f5e9;
  --card-3: #eef2ff;
  --card-4: #fff1e6;
  --card-5: #e0f7fa;
  --card-6: #f0f5ff;
  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg-0);
  line-height: 1.65;
}

.brand-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  background: linear-gradient(90deg, #f2f2f2 0%, #d9d9d9 50%, #f2f2f2 100%);
  color: var(--text);
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 600;
  font-style: italic;
  letter-spacing: 0.03em;
  text-align: center;
  padding: 0.4em 1em;
  border-bottom: 1px solid var(--border);
}
.brand-bar-icon {
  width: 30px;
  height: 30px;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5em;
  padding: 0.45em 1.4em;
  background: #ffffff;
  border-bottom: 1px solid var(--border);
}

@media (max-width: 640px) {
  .site-nav {
    flex-wrap: wrap;
    row-gap: 0.6em;
  }
  .site-nav-links {
    flex: 1 1 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
    order: 3;
  }
}

.site-nav-logo {
  display: flex;
  align-items: center;
  gap: 0.4em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  flex: 0 0 auto;
  text-decoration: none;
}
.site-nav-logo .logo-dot { color: var(--accent); }
.site-nav-logo-icon { width: 28px; height: 28px; }

.site-nav-links {
  display: flex;
  align-items: center;
  gap: 0.3em;
  flex: 1 1 auto;
  justify-content: center;
}

.site-nav-btn,
.site-nav-cta,
.site-nav-lang {
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
  font-size: 0.85rem;
  background: transparent;
  border: 1px solid transparent;
  padding: 0.35em 0.9em;
  border-radius: 999px;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}
.site-nav-btn:hover,
.site-nav-cta:hover {
  background: var(--bg-1);
  color: var(--accent);
}
.site-nav-cta { flex: 0 0 auto; }
.site-nav-lang {
  flex: 0 0 auto;
  color: var(--text-muted);
  border: 1px solid var(--border);
  margin-right: 0.6em;
}
.site-nav-lang:hover {
  background: var(--bg-1);
  color: var(--accent);
  border-color: var(--accent);
}

.site-nav-dropdown { position: relative; display: flex; align-items: center; }
.site-nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.14);
  padding: 0.4em;
  display: flex;
  flex-direction: column;
  min-width: 160px;
  z-index: 20;
}
.site-nav-dropdown-menu a {
  color: var(--text);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.55em 0.8em;
  border-radius: 6px;
  white-space: nowrap;
}
.site-nav-dropdown-menu a:hover { background: var(--bg-1); color: var(--accent); }

.screen {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4.5em 6vw;
  overflow: hidden;
  min-height: 58vh;
}
.screen::before,
.screen::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--bg-photo);
  background-size: cover;
  background-position: center;
  pointer-events: none;
  z-index: 0;
}
.screen::before {
  filter: grayscale(100%) brightness(1.35) contrast(0.7) blur(0.5px);
}
.screen::after {
  filter: grayscale(100%) invert(100%) blur(20px) brightness(1.05) contrast(0.75);
  mix-blend-mode: color-dodge;
  opacity: 0.7;
}

.screen > .content {
  position: relative;
  z-index: 1;
}

.hero { background: var(--bg-0); --bg-photo: url("../ims/assets/bg-documents.jpg"); }
.how-it-works { background: var(--bg-1); --bg-photo: url("../ims/assets/bg-checklist.jpg"); }
.layouts { background: var(--bg-3); --bg-photo: url("../ims/assets/bg-operations.jpg"); align-items: flex-start; }
.engine { background: var(--bg-2); --bg-photo: url("../ims/assets/bg-final.jpg"); align-items: flex-start; }

.content {
  max-width: 760px;
  width: 100%;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.16), 0 2px 8px rgba(0, 0, 0, 0.08);
  padding: 2.6em 3.4em;
  text-align: center;
}
.content-wide { max-width: 1040px; text-align: left; }

.kicker {
  color: var(--accent);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 0.8em 0;
}

.thesis {
  font-family: var(--font-display);
  font-size: 2.1rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 0 0 0.6em 0;
}

.content p {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin: 0 0 1.2em 0;
}
.content-wide p.section-intro {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 1.8em auto;
}

.cta-row {
  display: flex;
  gap: 1em;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 1.4em;
}

.cta {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  padding: 0.75em 1.5em;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(22, 119, 255, 0.3);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}
.cta:hover { box-shadow: 0 6px 16px rgba(22, 119, 255, 0.4); transform: translateY(-1px); }
.cta.secondary {
  background: #fff;
  color: var(--accent);
  border: 1px solid var(--accent);
  box-shadow: none;
}

.fact-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 2em;
  justify-content: center;
  margin-top: 1.6em;
  padding-top: 1.6em;
  border-top: 1px solid var(--border);
}
.fact-strip .fact { text-align: center; }
.fact-strip .fact .num {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--accent);
  display: block;
}
.fact-strip .fact .label { font-size: 0.8rem; color: var(--text-muted); }

.checklist {
  padding-left: 1.3em;
  font-size: 1.05rem;
  text-align: left;
  color: var(--text-muted);
}
.checklist li { margin-bottom: 0.7em; }
.checklist strong { color: var(--text); }

.deck {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 1.5em 0 0.5em 0;
}
.card {
  --tilt: 0deg;
  --tone: var(--card-1);
  flex: 1 1 250px;
  max-width: 300px;
  background: var(--tone);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.4em 1.5em;
  margin: 0 -14px 22px 0;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
  transform: rotate(var(--tilt));
  transition: transform 0.2s ease, box-shadow 0.2s ease, z-index 0s;
  position: relative;
}
.card:hover {
  transform: rotate(0deg) translateY(-4px);
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.18);
  z-index: 5;
}
.card h3 { margin: 0 0 0.5em 0; font-size: 1.05rem; color: var(--text); }
.card p { margin: 0; font-size: 0.92rem; color: var(--text-muted); line-height: 1.55; }
.card code {
  background: rgba(0, 0, 0, 0.06);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  font-size: 0.85em;
}

.card.c1 { --tilt: -1.5deg; --tone: var(--card-1); }
.card.c2 { --tilt: 1deg;    --tone: var(--card-2); }
.card.c3 { --tilt: -0.8deg; --tone: var(--card-3); }
.card.c4 { --tilt: 1.6deg;  --tone: var(--card-4); }
.card.c5 { --tilt: -1.2deg; --tone: var(--card-5); }
.card.c6 { --tilt: 0.7deg;  --tone: var(--card-6); }

@media (max-width: 700px) {
  .deck { flex-direction: column; align-items: stretch; }
  .card { max-width: none; margin: 0 0 14px 0; }
}

.shot-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.4em;
  margin-top: 1.6em;
}
.shot-grid figure {
  margin: 0;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
}
.shot-btn {
  display: block;
  width: 100%;
  padding: 0;
  margin: 0;
  border: none;
  background: none;
  cursor: zoom-in;
}
.shot-grid img {
  display: block;
  width: 100%;
  height: auto;
  border-bottom: 1px solid var(--border);
  transition: opacity 0.15s ease;
}
.shot-btn:hover img {
  opacity: 0.88;
}
.shot-grid figcaption {
  padding: 0.8em 1em;
  font-size: 0.85rem;
  color: var(--text-muted);
}
@media (max-width: 700px) {
  .shot-grid { grid-template-columns: 1fr; }
}

.screen-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4vh 4vw;
}
.screen-modal[hidden] { display: none; }
.screen-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(20, 25, 35, 0.6);
}
.screen-modal-box {
  position: relative;
  background: #ffffff;
  border-radius: 14px;
  max-width: 1100px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.3);
  padding: 1.6em;
}
.screen-modal-close {
  position: absolute;
  top: 0.6em;
  right: 0.7em;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 34px;
  height: 34px;
  font-size: 1.2rem;
  line-height: 1;
  color: var(--text-muted);
  cursor: pointer;
}
.screen-modal-close:hover { color: var(--accent); border-color: var(--accent); }
.screen-modal-img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--border);
  display: block;
}
.screen-modal-caption {
  margin: 1em 0 0 0;
  color: var(--text-muted);
  font-size: 0.95rem;
  text-align: center;
}

footer {
  text-align: center;
  padding: 2.5em 6vw;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}
footer a { color: var(--accent); }

@media (max-width: 600px) {
  .thesis { font-size: 1.5rem; }
  .content { padding: 1.8em 1.6em; border-radius: 10px; }
}

.contact-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4vh 4vw;
}
.contact-modal[hidden] { display: none; }
.contact-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(20, 25, 35, 0.6);
}
.contact-modal-box {
  position: relative;
  background: #ffffff;
  border-radius: 14px;
  max-width: 440px;
  width: 100%;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.3);
  padding: 2em 2.2em;
}
.contact-modal-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  margin: 0 0 0.4em 0;
}
.contact-modal-intro {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0 0 1.4em 0;
  line-height: 1.5;
}
#contactForm {
  display: flex;
  flex-direction: column;
  gap: 0.4em;
}
#contactForm label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-top: 0.6em;
}
#contactForm input,
#contactForm textarea {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 0.6em 0.8em;
  border: 1px solid var(--border);
  border-radius: 6px;
  resize: vertical;
}
#contactForm input:focus,
#contactForm textarea:focus {
  outline: none;
  border-color: var(--accent);
}
#contactForm .cta {
  margin-top: 1.2em;
  border: none;
  cursor: pointer;
}