/* ============================================================
   PinTrack Design System — Modern Neutral
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ── CSS Variables ──────────────────────────────────────────── */
:root {
  --bg-0:        #04040a;
  --bg-1:        #07070f;
  --bg-2:        #0e0e1a;
  --bg-3:        #151524;
  --bg-4:        #1c1c2e;

  --border:      rgba(255,255,255,0.07);
  --border-mid:  rgba(255,255,255,0.12);
  --border-hi:   rgba(255,255,255,0.20);

  --text-1:      #f0f0f0;
  --text-2:      #9a9a9a;
  --text-3:      #555555;

  --accent:      #e8e8e8;
  --accent-dim:  #aaaaaa;

  --radius-sm:   8px;
  --radius-md:   14px;
  --radius-lg:   20px;
  --radius-xl:   28px;

  --shadow-sm:   0 2px 8px rgba(0,0,0,0.4);
  --shadow-md:   0 8px 24px rgba(0,0,0,0.5);
  --shadow-lg:   0 20px 60px rgba(0,0,0,0.6);

  --transition:  0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-0);
  color: var(--text-1);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  overscroll-behavior: none;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }

/* ── Animated Background Canvas ────────────────────────────── */
#bg-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  touch-action: none;
}

/* ── Navbar ─────────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  height: 64px;
  background: rgba(10,10,10,0.7);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.02em;
  color: var(--text-1);
}

.navbar-brand img {
  width: 30px;
  height: 30px;
  border-radius: 7px;
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 100px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-2);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-1);
  background: rgba(255,255,255,0.06);
}

.nav-link.active {
  color: var(--text-1);
  background: var(--bg-3);
  border: 1px solid var(--border-mid);
}

.nav-link-back {
  color: var(--text-2);
}

/* ── Page Wrapper ───────────────────────────────────────────── */
.page-wrapper {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  padding-top: 64px;
}

/* ── Hero Section ───────────────────────────────────────────── */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 64px);
  padding: 60px 24px;
  text-align: center;
}

.hero-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 16px;
  opacity: 0;
  animation: fadeUp 0.6s cubic-bezier(0.4,0,0.2,1) 0.1s forwards;
}

.hero-logo {
  width: 120px;
  height: 120px;
  border-radius: 26px;
  box-shadow: var(--shadow-lg), 0 0 0 1px var(--border-mid);
  margin-bottom: 32px;
  opacity: 0;
  animation: fadeUp 0.7s cubic-bezier(0.4,0,0.2,1) 0.15s forwards;
  transition: transform var(--transition);
  background: #fff;
  padding: 1px;
  object-fit: contain;
}

.hero-logo:hover {
  transform: scale(1.04) translateY(-4px);
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: var(--text-1);
  margin-bottom: 16px;
  opacity: 0;
  animation: fadeUp 0.7s cubic-bezier(0.4,0,0.2,1) 0.25s forwards;
}

.hero-subtitle {
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--text-2);
  margin-bottom: 48px;
  max-width: 420px;
  opacity: 0;
  animation: fadeUp 0.7s cubic-bezier(0.4,0,0.2,1) 0.35s forwards;
}

/* ── Download Buttons ───────────────────────────────────────── */
.download-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  opacity: 0;
  animation: fadeUp 0.7s cubic-bezier(0.4,0,0.2,1) 0.45s forwards;
}

.download-btn-wrap {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.download-btn-wrap.disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.download-btn-wrap.disabled::after {
  content: "Coming Soon";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.65);
  color: var(--text-1);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  backdrop-filter: blur(2px);
  border-radius: var(--radius-md);
}

.download-btn-wrap:not(.disabled):hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.download-btn-wrap img {
  height: 52px;
  width: auto;
  border-radius: var(--radius-md);
  display: block;
  background: #fff;
  padding: 1px;
}

/* ── App Selection Grid (index.html) ────────────────────────── */
.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  max-width: 760px;
  width: 100%;
  opacity: 0;
  animation: fadeUp 0.8s cubic-bezier(0.4,0,0.2,1) 0.4s forwards;
}

.app-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 48px 36px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  text-decoration: none;
  color: var(--text-1);
  transition: background var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.app-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(255,255,255,0.04) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition);
}

.app-card:hover {
  background: var(--bg-3);
  border-color: var(--border-hi);
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.app-card:hover::before {
  opacity: 1;
}

.app-card-icon {
  width: 88px;
  height: 88px;
  border-radius: 20px;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition);
  background: #fff;
  padding: 3px;
  object-fit: contain;
}

.app-card:hover .app-card-icon {
  transform: scale(1.06);
}

.app-card-name {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.app-card-desc {
  font-size: 0.9rem;
  color: var(--text-2);
  text-align: center;
  line-height: 1.5;
}

.app-card-arrow {
  font-size: 1rem;
  color: var(--text-3);
  transition: transform var(--transition), color var(--transition);
}

.app-card:hover .app-card-arrow {
  transform: translateX(4px);
  color: var(--text-2);
}

/* ── Content Card (support / inner pages) ───────────────────── */
.content-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 52px;
  max-width: 640px;
  width: 100%;
  margin: 0 auto;
  box-shadow: var(--shadow-md);
  opacity: 0;
  animation: fadeUp 0.7s cubic-bezier(0.4,0,0.2,1) 0.2s forwards;
}

.card-title {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text-1);
  margin-bottom: 8px;
}

.card-subtitle {
  font-size: 1rem;
  color: var(--text-2);
  margin-bottom: 36px;
}

/* ── Support Page ───────────────────────────────────────────── */
.support-section {
  margin-top: 28px;
}

.support-intro {
  font-size: 1rem;
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 28px;
}

.support-email-block {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 24px;
  background: var(--bg-3);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-md);
  transition: border-color var(--transition), background var(--transition);
  text-decoration: none;
  color: var(--text-1);
}

.support-email-block:hover {
  background: var(--bg-4);
  border-color: var(--border-hi);
}

.support-email-icon {
  font-size: 1.3rem;
  flex-shrink: 0;
}

.support-email-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 2px;
}

.support-email-addr {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-1);
}

.back-home-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 36px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-2);
  padding: 10px 18px;
  border-radius: 100px;
  border: 1px solid var(--border);
  background: var(--bg-3);
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.back-home-link:hover {
  color: var(--text-1);
  border-color: var(--border-mid);
  background: var(--bg-4);
}

/* ── FAQ Page ───────────────────────────────────────────────── */
.faq-wrapper {
  max-width: 760px;
  width: 100%;
  margin: 0 auto;
  padding: 60px 24px;
  opacity: 0;
  animation: fadeUp 0.7s cubic-bezier(0.4,0,0.2,1) 0.1s forwards;
}

.faq-header {
  margin-bottom: 48px;
}

.faq-header-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text-1);
  margin-bottom: 8px;
}

.faq-header-sub {
  font-size: 1rem;
  color: var(--text-2);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 48px;
}

.faq-item {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition);
}

.faq-item:hover {
  border-color: var(--border-mid);
}

.faq-item.open {
  border-color: var(--border-mid);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 22px 24px;
  background: none;
  border: none;
  color: var(--text-1);
  font-size: 0.975rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.faq-question:hover {
  background: rgba(255,255,255,0.03);
}

.faq-question:focus-visible {
  outline: 2px solid var(--border-hi);
  outline-offset: -2px;
}

.faq-chevron {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--text-3);
  transition: transform var(--transition), color var(--transition);
}

.faq-item.open .faq-chevron {
  transform: rotate(180deg);
  color: var(--text-2);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-answer-inner {
  padding: 0 24px 22px;
  color: var(--text-2);
  font-size: 0.95rem;
  line-height: 1.75;
  border-top: 1px solid var(--border);
  padding-top: 18px;
}

.faq-answer-inner a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}

.faq-answer-inner a:hover {
  color: var(--text-1);
}

.faq-footer {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 24px 28px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  color: var(--text-2);
}

.faq-footer a {
  color: var(--text-1);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}

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

/* ── Scroll-reveal utility ──────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--transition), transform 0.6s var(--transition);
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ── Animations ─────────────────────────────────────────────── */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse-ring {
  0%   { transform: scale(1); opacity: 0.4; }
  100% { transform: scale(1.6); opacity: 0; }
}

/* ── Home Page Layout ───────────────────────────────────────── */
.home-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 64px);
  padding: 60px 24px;
  gap: 56px;
}

.home-title-block {
  text-align: center;
  opacity: 0;
  animation: fadeUp 0.7s cubic-bezier(0.4,0,0.2,1) 0.1s forwards;
}

.home-title {
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  color: var(--text-1);
  line-height: 1;
  margin-bottom: 20px;
}

.home-divider {
  width: 40px;
  height: 2px;
  background: var(--border-hi);
  margin: 0 auto;
  border: none;
}

.home-app-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  width: 100%;
  max-width: 520px;
  opacity: 0;
  animation: fadeUp 0.7s cubic-bezier(0.4,0,0.2,1) 0.25s forwards;
}

.home-app-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 32px 20px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--text-1);
  transition: background var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.home-app-card:hover {
  background: var(--bg-3);
  border-color: var(--border-hi);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.home-app-icon-wrap {
  flex-shrink: 0;
  width: 100px;
  height: 100px;
  border-radius: 22px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.home-app-icon {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #fff;
  padding: 1px;
  border-radius: 22px;
}

.home-app-info {
  text-align: center;
}

.home-app-name {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-1);
  margin-bottom: 4px;
}

.home-app-cta {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-3);
  transition: color var(--transition-fast);
}

.home-app-card:hover .home-app-cta {
  color: var(--text-2);
}

/* ── Home Page Responsive ───────────────────────────────────── */
@media (max-width: 640px) {
  .home-hero {
    gap: 40px;
    padding: 40px 20px;
  }
  .home-title {
    font-size: 3rem;
  }
  .home-app-grid {
    max-width: 100%;
    grid-template-columns: 1fr 1fr;
  }
  .home-app-icon-wrap {
    width: 80px;
    height: 80px;
    border-radius: 18px;
  }
  .home-app-icon {
    border-radius: 18px;
  }
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 640px) {
  .navbar {
    padding: 0 20px;
    height: 56px;
  }

  .page-wrapper {
    padding-top: 56px;
  }

  .hero {
    padding: 40px 20px;
  }

  .hero-logo {
    width: 96px;
    height: 96px;
    border-radius: 22px;
  }

  .app-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
  }

  .app-card {
    padding: 36px 28px;
  }

  .content-card {
    padding: 36px 28px;
  }

  .faq-wrapper {
    padding: 40px 20px;
  }

  .faq-question {
    padding: 18px 20px;
    font-size: 0.9rem;
  }

  .faq-answer-inner {
    padding: 0 20px 18px;
    padding-top: 14px;
  }
}

@media (max-width: 400px) {
  .navbar-brand span { display: none; }
  .content-card { padding: 28px 20px; }
}