/* PolyBag — shared styles (reset, design system, nav, footer, animations) */

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

:root {
  --bg-page: #fafbfc;
  --bg-white: #ffffff;
  --bg-subtle: #f3f5f7;
  --bg-muted: #ebeef2;
  --accent: #0d9488;
  --accent-light: #e6f5f2;
  --accent-hover: #0b7f75;
  --text-heading: #111927;
  --text-body: #384250;
  --text-muted: #6c7a8a;
  --text-faint: #9ca6b2;
  --border: #e3e7ec;
  --border-light: #eef1f4;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg-page);
  color: var(--text-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── Nav ── */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(250, 251, 252, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
}

.nav-logo {
  font-family: 'Satoshi', sans-serif;
  font-weight: 900;
  font-size: 1.3rem;
  letter-spacing: -0.03em;
  color: var(--text-heading);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.nav-logo .logo-mark {
  width: 26px;
  height: 26px;
  background: var(--accent);
  border-radius: 6px;
  position: relative;
  overflow: hidden;
}

.nav-logo .logo-mark::before {
  content: '';
  position: absolute;
  inset: 4px;
  background: repeating-linear-gradient(
    90deg,
    #fff 0px, #fff 2px,
    transparent 2px, transparent 3px,
    #fff 3px, #fff 4px,
    transparent 4px, transparent 7px
  );
  border-radius: 2px;
  opacity: 0.5;
}

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

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--text-heading); }
.nav-links a.active { color: var(--accent); }

.nav-contact {
  font-family: 'DM Mono', monospace;
  font-size: 0.8rem !important;
  color: var(--accent) !important;
  border: 1px solid var(--accent);
  padding: 0.45rem 0.9rem;
  border-radius: 6px;
  transition: all 0.2s !important;
}

.nav-contact:hover {
  background: var(--accent);
  color: #fff !important;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 0.5rem;
  border-radius: 6px;
  cursor: pointer;
}

/* ── Section labels / design system ── */
.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
  display: block;
}

.section-title {
  font-family: 'Satoshi', sans-serif;
  font-weight: 700;
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  letter-spacing: -0.025em;
  line-height: 1.2;
  color: var(--text-heading);
}

/* ── Buttons ── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'DM Sans', sans-serif;
  font-weight: 600;
  font-size: 0.925rem;
  color: #fff;
  background: var(--accent);
  border: none;
  padding: 0.8rem 1.6rem;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(13, 148, 136, 0.2);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: 'DM Sans', sans-serif;
  font-weight: 500;
  font-size: 0.925rem;
  color: var(--text-muted);
  background: none;
  border: 1px solid var(--border);
  padding: 0.8rem 1.6rem;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
}

.btn-ghost:hover {
  color: var(--text-heading);
  border-color: #cdd3da;
  background: var(--bg-subtle);
}

/* ── Footer ── */
footer {
  border-top: 1px solid var(--border-light);
  padding: 1.75rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  background: var(--bg-page);
}

footer .footer-left {
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-faint);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

footer a {
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-faint);
  text-decoration: none;
  transition: color 0.2s;
}

footer a:hover { color: var(--accent); }

/* ── Scroll Animations ── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Mobile ── */
@media (max-width: 768px) {
  nav { padding: 0.9rem 1.25rem; }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(250, 251, 252, 0.97);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 1.25rem;
    gap: 0.75rem;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open { display: flex; }

  .mobile-menu-btn { display: block; }

  footer {
    flex-direction: column;
    text-align: center;
  }
}