/* PetBond — In Development */

:root {
  color-scheme: light;
  --pb-accent: #e8919b;
  --pb-accent-dark: #c96b78;
  --pb-accent-light: #f0a8b0;
  --pb-accent-soft: rgba(232, 145, 155, 0.16);
  --pb-accent-glow: rgba(232, 145, 155, 0.35);
  --pb-accent-glow-strong: rgba(232, 145, 155, 0.55);
  --pb-bg: #faf7f8;
  --pb-bg-gradient-top: #f8eff1;
  --pb-surface: #ffffff;
  --pb-text: #2a1f22;
  --pb-text-muted: #6b5c60;
  --pb-border: rgba(232, 145, 155, 0.18);
  --pb-nav-bg: rgba(250, 247, 248, 0.9);
  --pb-btn-text: #ffffff;
  --pb-font: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Text', sans-serif;
  --pb-transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  color-scheme: dark;
  --pb-accent: #e8919b;
  --pb-accent-dark: #f0a8b0;
  --pb-accent-light: #f5b8bf;
  --pb-accent-soft: rgba(232, 145, 155, 0.14);
  --pb-accent-glow: rgba(232, 145, 155, 0.28);
  --pb-accent-glow-strong: rgba(232, 145, 155, 0.42);
  --pb-bg: #120d0f;
  --pb-bg-gradient-top: #1a1215;
  --pb-surface: #1e1618;
  --pb-text: #f5eef0;
  --pb-text-muted: #a89498;
  --pb-border: rgba(232, 145, 155, 0.16);
  --pb-nav-bg: rgba(18, 13, 15, 0.92);
  --pb-btn-text: #1a1214;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--pb-font);
  background: var(--pb-bg);
  color: var(--pb-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--pb-transition), color var(--pb-transition);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

/* Nav */
.pb-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 24px;
  background: var(--pb-nav-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--pb-border);
  transition: background var(--pb-transition), border-color var(--pb-transition);
}

.pb-nav-inner {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.pb-nav-start {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.pb-nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--pb-text);
  flex-shrink: 0;
}

.pb-nav-icon {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  box-shadow: 0 4px 16px var(--pb-accent-glow);
}

.pb-lang-switch {
  display: flex;
  gap: 4px;
  padding: 4px;
  border-radius: 100px;
  border: 1px solid var(--pb-border);
  background: var(--pb-surface);
  flex-shrink: 0;
}

.pb-lang-switch .lang-switch-btn {
  font-family: var(--pb-font);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 6px 10px;
  border: none;
  border-radius: 100px;
  background: transparent;
  color: var(--pb-text-muted);
  cursor: pointer;
  transition: color var(--pb-transition), background var(--pb-transition);
}

.pb-lang-switch .lang-switch-btn.is-active {
  background: var(--pb-accent-soft);
  color: var(--pb-text);
}

.pb-theme-toggle {
  position: relative;
  width: 56px;
  height: 30px;
  padding: 0;
  border: 1px solid var(--pb-border);
  border-radius: 100px;
  background: var(--pb-surface);
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color var(--pb-transition), box-shadow var(--pb-transition);
}

.pb-theme-toggle:hover {
  border-color: var(--pb-accent);
  box-shadow: 0 0 0 3px var(--pb-accent-soft);
}

.pb-theme-toggle-track {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
}

.pb-theme-icon {
  position: absolute;
  top: 50%;
  width: 14px;
  height: 14px;
  color: var(--pb-text-muted);
  transform: translateY(-50%);
  transition: color var(--pb-transition), opacity var(--pb-transition);
}

.pb-theme-icon--sun {
  left: 8px;
}

.pb-theme-icon--moon {
  right: 8px;
}

.pb-theme-toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--pb-accent);
  box-shadow: 0 2px 8px var(--pb-accent-glow);
  transition: transform var(--pb-transition), background var(--pb-transition);
}

[data-theme="dark"] .pb-theme-toggle-thumb {
  transform: translateX(26px);
  background: var(--pb-accent-light);
}

[data-theme="dark"] .pb-theme-icon--moon {
  color: var(--pb-text);
}

[data-theme="light"] .pb-theme-icon--sun,
:root:not([data-theme]) .pb-theme-icon--sun {
  color: var(--pb-text);
}

.pb-nav-end {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.pb-nav-back {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--pb-text-muted);
  padding: 8px 16px;
  border-radius: 100px;
  border: 1px solid var(--pb-border);
  background: var(--pb-surface);
  transition: color var(--pb-transition), border-color var(--pb-transition);
}

.pb-nav-back:hover {
  color: var(--pb-accent-dark);
  border-color: var(--pb-accent);
}

/* Dev screen */
.pb-dev-screen {
  position: relative;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  overflow: hidden;
}

.pb-dev-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 55% at 80% 15%, var(--pb-accent-soft), transparent),
    radial-gradient(ellipse 60% 50% at 15% 85%, rgba(232, 145, 155, 0.08), transparent),
    linear-gradient(180deg, var(--pb-bg-gradient-top) 0%, var(--pb-bg) 100%);
  z-index: 0;
  transition: background var(--pb-transition);
}

[data-theme="dark"] .pb-dev-bg {
  background:
    radial-gradient(ellipse 70% 55% at 80% 15%, var(--pb-accent-soft), transparent),
    radial-gradient(ellipse 60% 50% at 15% 85%, rgba(232, 145, 155, 0.06), transparent),
    linear-gradient(180deg, var(--pb-bg-gradient-top) 0%, var(--pb-bg) 100%);
}

.pb-dev-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 480px;
}

.pb-dev-icon {
  width: 112px;
  height: 112px;
  border-radius: 26px;
  margin: 0 auto 28px;
  box-shadow:
    0 20px 48px var(--pb-accent-glow),
    0 0 0 1px rgba(232, 145, 155, 0.12);
}

.pb-dev-title {
  font-size: clamp(2.5rem, 6vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--pb-text) 20%, var(--pb-accent-dark));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.pb-dev-badge {
  display: inline-block;
  padding: 8px 18px;
  margin-bottom: 20px;
  background: var(--pb-accent-soft);
  border: 1px solid var(--pb-border);
  border-radius: 100px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--pb-accent-dark);
  letter-spacing: 0.02em;
}

.pb-dev-desc {
  font-size: 1.0625rem;
  color: var(--pb-text-muted);
  line-height: 1.7;
  margin-bottom: 32px;
}

.pb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 14px;
  font-size: 0.9375rem;
  font-weight: 600;
  background: var(--pb-accent);
  color: var(--pb-btn-text);
  box-shadow: 0 8px 24px var(--pb-accent-glow);
  transition: transform 0.2s, box-shadow var(--pb-transition), background var(--pb-transition);
}

.pb-btn:hover {
  transform: translateY(-2px);
  background: var(--pb-accent-light);
  box-shadow:
    0 12px 32px var(--pb-accent-glow-strong),
    0 0 48px var(--pb-accent-glow);
}

/* Footer */
.pb-footer {
  padding: 24px;
  text-align: center;
  border-top: 1px solid var(--pb-border);
  background: var(--pb-surface);
  transition: background var(--pb-transition), border-color var(--pb-transition);
}

.pb-footer p {
  font-size: 0.875rem;
  color: var(--pb-text-muted);
}

.pb-footer a {
  transition: color var(--pb-transition);
}

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

@media (max-width: 720px) {
  .pb-nav-back {
    padding: 8px 12px;
    font-size: 0.8125rem;
  }
}

@media (max-width: 480px) {
  .pb-dev-screen {
    padding: 110px 20px 64px;
  }

  .pb-dev-icon {
    width: 96px;
    height: 96px;
    border-radius: 22px;
  }

  .pb-nav-inner {
    flex-wrap: wrap;
  }

  .pb-nav-end {
    width: 100%;
    justify-content: flex-end;
  }
}