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

html,
body {
  min-height: 100%;
}

body {
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "SF Pro Text",
    Roboto,
    sans-serif;
  line-height: 1.6;
  color: #0f172a;
  background: #0b1120;
}

body.policy-page {
  background: #f8fafc;
  color: #0f172a;
}

/* Layout helpers */
.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

body.policy-page .site-header {
  background: #ffffff;
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
  backdrop-filter: none;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
}

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 20%, #22c55e, #15803d);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ecfdf5;
  font-weight: 700;
  text-transform: lowercase;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-weight: 600;
  color: #e5e7eb;
}

body.policy-page .brand-name {
  color: #0f172a;
}

.brand-tagline {
  font-size: 0.75rem;
  color: #9ca3af;
}

body.policy-page .brand-tagline {
  color: #475569;
}

.main-nav {
  display: flex;
  gap: 1.25rem;
  font-size: 0.95rem;
}

.main-nav a {
  color: #cbd5f5;
  text-decoration: none;
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
}

.main-nav a:hover {
  border-bottom-color: #22c55e;
}

body.policy-page .main-nav a {
  color: #0f172a;
}

body.policy-page .main-nav a:hover {
  border-bottom-color: #15803d;
}

/* Hero */
.hero {
  padding: 3.5rem 0 2.5rem;
  background: radial-gradient(circle at top left, #0f172a, #020617);
  color: #e5e7eb;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.5fr);
  gap: 2.5rem;
  align-items: center;
}

.hero-text h1 {
  font-size: clamp(2.2rem, 3vw, 2.8rem);
  margin-bottom: 0.75rem;
}

.hero-text p {
  color: #cbd5f5;
  margin-bottom: 1rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.hero-card {
  background: rgba(15, 23, 42, 0.9);
  border-radius: 1.25rem;
  border: 1px solid rgba(148, 163, 184, 0.35);
  padding: 1.5rem;
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.6);
}

.hero-card h2 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.hero-card p {
  color: #cbd5f5;
}

.hero-list {
  list-style: disc;
  margin: 0.75rem 0 1rem 1.25rem;
  color: #cbd5f5;
}

.hero-note {
  font-size: 0.8rem;
  color: #9ca3af;
  margin-top: 0.5rem;
}

.hero-note a {
  color: #ffffff;
}

.pbt-lang-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
  font-size: 0.85rem;
  margin-top: 0.75rem;
  color: #cbd5f5;
}

.pbt-lang-nav span {
  font-weight: 600;
  margin-right: 0.35rem;
}

.pbt-lang-nav a {
  color: #cbd5f5;
  text-decoration: none;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  transition: border-color 0.2s ease, color 0.2s ease,
    background-color 0.2s ease;
}

.pbt-lang-nav a:hover {
  border-color: #22c55e;
  color: #22c55e;
}

.pbt-lang-nav a.is-active {
  background: rgba(15, 118, 110, 0.4);
  border-color: rgba(34, 197, 94, 0.8);
  color: #ecfdf5;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-visual img {
  max-width: 360px;
  width: 100%;
  border-radius: 1.5rem;
  border: 1px solid rgba(148, 163, 184, 0.4);
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.6);
}

.hero-visual-home {
  max-width: 200px;
  width: 100%;
}

.hero-visual-home img {
  display: block;
  max-width: 200px;
  width: 100%;
  height: auto;
  border-radius: 1.5rem;
  border: 1px solid rgba(148, 163, 184, 0.4);
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.6);
}

/* Sections */
.section {
  padding: 3rem 0;
  background: #020617;
  color: #e5e7eb;
}

.policy-section {
  background: #f8fafc;
  color: #0f172a;
}

.section.alt {
  background: #020617 radial-gradient(circle at top, #111827, #020617);
}

.section h2 {
  font-size: 1.6rem;
  margin-bottom: 1.5rem;
}

/* Cards / grids */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}

.card {
  background: rgba(15, 23, 42, 0.9);
  border-radius: 1.25rem;
  border: 1px solid rgba(148, 163, 184, 0.3);
  padding: 1.5rem;
}

.card h3 {
  margin-bottom: 0.5rem;
}

.apps-layout,
.about-layout,
.feedback-layout {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.5fr);
  gap: 2rem;
  align-items: flex-start;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.3rem;
  border-radius: 999px;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition:
    transform 0.1s ease,
    box-shadow 0.1s ease,
    background 0.1s ease,
    color 0.1s ease;
  white-space: nowrap;
}

.btn.primary {
  background: linear-gradient(135deg, #22c55e, #16a34a);
  color: #052e16;
  box-shadow: 0 10px 25px rgba(22, 163, 74, 0.4);
}

.btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 30px rgba(22, 163, 74, 0.55);
}

.btn.secondary {
  background: rgba(15, 23, 42, 1);
  color: #bbf7d0;
  border-color: rgba(34, 197, 94, 0.5);
}

.btn.secondary:hover {
  background: rgba(15, 23, 42, 0.95);
}

.btn.ghost {
  background: transparent;
  color: #e5e7eb;
  border-color: rgba(148, 163, 184, 0.7);
}

.btn.ghost:hover {
  background: rgba(15, 23, 42, 0.8);
}

.btn.full-width {
  width: 100%;
}

/* Lists */
.feature-list,
.how-list {
  margin-left: 1.5rem;
  margin-bottom: 1.25rem;
}

.feature-list {
  margin-top: 1.25rem;
}

.brand-emphasis {
  color: #22c55e;
}

.policy-content {
  max-width: 760px;
  margin: 0 auto;
  line-height: 1.7;
}

.policy-card {
  background: #ffffff;
  border-radius: 1.5rem;
  padding: 2rem;
  border: 1px solid rgba(15, 23, 42, 0.08);
  box-shadow: 0 25px 50px rgba(15, 23, 42, 0.08);
}

.policy-content h1 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.policy-content h2 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.policy-content h3 {
  margin-top: 1.25rem;
  margin-bottom: 0.35rem;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #475569;
}

.policy-content ul {
  margin: 0.75rem 0 1rem 1.25rem;
  padding: 0;
  list-style: disc;
}

.policy-content a {
  color: #15803d;
}

.policy-back-link {
  margin-bottom: 1rem;
}

.policy-lang-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.policy-lang-nav span {
  font-weight: 600;
  margin-right: 0.5rem;
}

.policy-lang-nav a {
  color: #0f172a;
  text-decoration: none;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.policy-lang-nav a:hover {
  border-color: #15803d;
  color: #15803d;
}

.policy-lang-nav a.is-active {
  background: #0f172a;
  color: #ffffff;
  border-color: #0f172a;
}

body.policy-page .site-footer {
  background: #ffffff;
  border-top: 1px solid rgba(15, 23, 42, 0.08);
  color: #0f172a;
}

.feature-list li,
.how-list li {
  margin-bottom: 0.35rem;
}

/* PBT logo */
.pbt-logo {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.15rem;
}

.pbt-logo-main {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.3rem 0.9rem;
  background: radial-gradient(circle at 20% 10%, #22c55e, #064e3b);
  color: #ecfdf5;
  font-weight: 700;
  letter-spacing: 0.06em;
  font-size: 0.9rem;
}

.pbt-logo-sub {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: #9ca3af;
}

.pbt-logo.large .pbt-logo-main {
  padding: 0.45rem 1.2rem;
  font-size: 1.05rem;
}

.pbt-logo.large .pbt-logo-sub {
  font-size: 0.8rem;
}

.pbt-preview-card {
  background: radial-gradient(circle at top, #0f172a, #020617);
  border-radius: 1.5rem;
  border: 1px solid rgba(34, 197, 94, 0.4);
  padding: 1.5rem;
  box-shadow: 0 20px 40px rgba(6, 95, 70, 0.6);
}

.pbt-preview-text {
  margin-top: 0.8rem;
  color: #bbf7d0;
}

/* Contact & feedback */
.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 2.5fr) minmax(0, 3fr);
  gap: 2rem;
  align-items: flex-start;
}

.contact-list {
  list-style: none;
}

.contact-list li {
  margin-bottom: 0.5rem;
}

.contact-note {
  font-size: 0.9rem;
  color: #cbd5f5;
}

.contact-list a,
.contact-note a {
  color: #ffffff;
  font-weight: 600;
}

.feedback-email a {
  color: #ffffff;
  font-weight: 700;
}

.feedback-note {
  font-size: 0.85rem;
  color: #9ca3af;
}

.feedback-form .form-field {
  margin-bottom: 1rem;
}

.feedback-form label {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 0.9rem;
  color: #e5e7eb;
}

.feedback-form input,
.feedback-form textarea {
  width: 100%;
  padding: 0.55rem 0.7rem;
  border-radius: 0.75rem;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: rgba(15, 23, 42, 0.9);
  color: #e5e7eb;
}

.feedback-form input:focus,
.feedback-form textarea:focus {
  outline: 2px solid rgba(34, 197, 94, 0.6);
  outline-offset: 1px;
}

.form-hint {
  margin-top: 0.75rem;
  font-size: 0.8rem;
  color: #9ca3af;
}

/* About */
.about-list {
  display: grid;
  gap: 1rem;
}

.about-item h3 {
  margin-bottom: 0.25rem;
}

/* Footer */
.site-footer {
  padding: 1.2rem 0 1.4rem;
  border-top: 1px solid rgba(148, 163, 184, 0.3);
  background: #020617;
  color: #9ca3af;
  font-size: 0.85rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-inner,
  .grid-3,
  .apps-layout,
  .about-layout,
  .contact-layout,
  .feedback-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-inner {
    text-align: left;
  }

  .header-inner {
    gap: 1rem;
  }

  .main-nav {
    display: none; /* keep simple for now; can add burger menu later */
  }

  .site-header {
    position: static;
  }
}