/* ============================================
   Blockit — Static Website Styles
   ============================================ */

/* --- CSS Variables --- */
:root {
  --blue-50: #E3F2FD;
  --blue-100: #BBDEFB;
  --blue-200: #90CAF9;
  --blue-400: #42A5F5;
  --blue-600: #1E88E5;
  --blue-700: #1976D2;
  --blue-800: #1565C0;

  --grey-50: #FAFAFA;
  --grey-100: #F5F5F5;
  --grey-200: #EEEEEE;
  --grey-300: #E0E0E0;
  --grey-400: #BDBDBD;
  --grey-600: #757575;
  --grey-800: #424242;

  --white: #FFFFFF;
  --text-primary: var(--grey-800);
  --text-secondary: var(--grey-600);
  --text-muted: var(--grey-400);
  --bg-page: var(--white);
  --bg-alt: var(--grey-50);
  --accent: var(--blue-600);
  --accent-hover: var(--blue-700);
  --accent-light: var(--blue-50);

  --font-stack: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
  --max-width: 1120px;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(30,136,229,0.10);
  --shadow-lg: 0 8px 32px rgba(30,136,229,0.12);
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-stack);
  font-size: 18px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

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

/* --- Typography --- */
h1, h2, h3, h4 {
  line-height: 1.2;
  font-weight: 700;
  color: var(--text-primary);
}

h1 { font-size: 3.2rem; letter-spacing: -0.03em; }
h2 { font-size: 2.2rem; letter-spacing: -0.02em; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.1rem; }

p {
  color: var(--text-secondary);
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 96px 0;
}

/* --- Header / Nav --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--grey-200);
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-primary);
}

.nav-logo-img {
  height: 32px;
  width: 32px;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
}

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

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  background: var(--accent);
  color: var(--white) !important;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: background var(--transition), transform var(--transition);
}

.nav-cta:hover {
  background: var(--accent-hover);
  color: var(--white) !important;
  transform: translateY(-1px);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  margin: 6px 0;
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* --- Hero --- */
.hero {
  padding: 160px 0 96px;
  text-align: center;
  background: linear-gradient(180deg, var(--blue-50) 0%, var(--white) 60%);
}

.hero h1 {
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.6;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 36px;
  background: var(--accent);
  color: var(--white);
  border: none;
  border-radius: 12px;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 16px rgba(30,136,229,0.25);
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(30,136,229,0.30);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 36px;
  background: var(--white);
  color: var(--text-primary);
  border: 1.5px solid var(--grey-300);
  border-radius: 12px;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color var(--transition), transform var(--transition);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* Phone mockup placeholder */
.hero-image {
  max-width: 320px;
  margin: 0 auto;
  aspect-ratio: 9 / 17;
  background: linear-gradient(145deg, var(--blue-50), var(--blue-100));
  border-radius: 32px;
  border: 4px solid var(--grey-200);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
}

/* --- Problem Section --- */
.problem {
  background: var(--bg-page);
  text-align: center;
}

.problem-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.stat {
  text-align: center;
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  display: block;
}

.stat-label {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.problem-text {
  max-width: 680px;
  margin: 0 auto;
}

.problem-text p {
  font-size: 1.2rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.problem-text p:last-child {
  margin-bottom: 0;
}

.text-emphasis {
  color: var(--text-primary);
  font-weight: 600;
}

/* --- Features --- */
.features {
  background: var(--bg-alt);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header p {
  font-size: 1.1rem;
  max-width: 560px;
  margin: 12px auto 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--white);
  padding: 40px 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--grey-200);
  transition: transform var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.feature-icon.blue {
  background: var(--blue-50);
}

.feature-icon.teal {
  background: #E0F2F1;
}

.feature-icon.purple {
  background: #F3E5F5;
}

.feature-card h3 {
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 1rem;
  line-height: 1.65;
}

/* --- How It Works --- */
.how-it-works {
  background: var(--bg-page);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  max-width: 900px;
  margin: 0 auto;
}

.step {
  text-align: center;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--white);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.step h3 {
  margin-bottom: 8px;
}

.step p {
  font-size: 0.98rem;
}

/* --- Bottom CTA --- */
.bottom-cta {
  text-align: center;
  background: linear-gradient(180deg, var(--white) 0%, var(--blue-50) 100%);
}

.bottom-cta h2 {
  margin-bottom: 12px;
}

.bottom-cta > .container > p {
  font-size: 1.15rem;
  max-width: 520px;
  margin: 0 auto 36px;
}

.cta-note {
  font-size: 0.9rem !important;
  color: var(--text-muted) !important;
  margin-top: 16px !important;
}

/* --- Footer --- */
.site-footer {
  padding: 48px 0;
  border-top: 1px solid var(--grey-200);
  background: var(--bg-page);
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 24px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.footer-logo-img {
  height: 28px;
  width: 28px;
  object-fit: contain;
}

.footer-copyright {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.footer-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
}

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

/* ============================================
   Content Pages (Privacy, Contact)
   ============================================ */
.page-hero {
  padding: 140px 0 48px;
  background: linear-gradient(180deg, var(--blue-50) 0%, var(--white) 100%);
  text-align: center;
}

.page-hero p {
  margin-top: 8px;
  font-size: 1.1rem;
}

.page-content {
  padding: 48px 0 96px;
}

.page-content .container {
  max-width: 760px;
}

.page-content h2 {
  font-size: 1.5rem;
  margin-top: 40px;
  margin-bottom: 12px;
}

.page-content h2:first-child {
  margin-top: 0;
}

.page-content p {
  margin-bottom: 16px;
}

.page-content ul {
  margin-bottom: 16px;
  padding-left: 24px;
}

.page-content li {
  margin-bottom: 8px;
  color: var(--text-secondary);
}

/* Contact page */
.contact-card {
  background: var(--bg-alt);
  border: 1px solid var(--grey-200);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
  max-width: 520px;
  margin: 0 auto;
}

.contact-card p {
  margin-bottom: 24px;
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--accent);
}

.contact-email:hover {
  color: var(--accent-hover);
}

/* ============================================
   Responsive
   ============================================ */

/* Tablet */
@media (max-width: 900px) {
  h1 { font-size: 2.5rem; }
  h2 { font-size: 1.8rem; }
  section { padding: 72px 0; }

  .features-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }

  .steps {
    grid-template-columns: 1fr;
    max-width: 400px;
    gap: 32px;
  }

  .problem-stats {
    gap: 32px;
  }
}

/* Mobile */
@media (max-width: 640px) {
  body { font-size: 16px; }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  section { padding: 56px 0; }

  .container { padding: 0 20px; }

  /* Mobile nav */
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--white);
    border-bottom: 1px solid var(--grey-200);
    padding: 16px 24px 24px;
    gap: 16px;
    box-shadow: var(--shadow-md);
  }

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

  .nav-toggle {
    display: block;
  }

  .nav-toggle.open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
  }
  .nav-toggle.open span:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle.open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
  }

  /* Hero */
  .hero { padding: 120px 0 64px; }
  .hero-subtitle { font-size: 1.05rem; }
  .hero-image { max-width: 240px; border-radius: 24px; }

  .hero-cta-group {
    flex-direction: column;
  }

  .btn-primary, .btn-secondary {
    width: 100%;
    justify-content: center;
    padding: 14px 28px;
  }

  /* Stats */
  .stat-number { font-size: 2.4rem; }
  .problem-text p { font-size: 1.05rem; }

  /* Features */
  .feature-card { padding: 28px 24px; }

  /* Footer */
  .footer-content {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .footer-left { flex-direction: column; align-items: flex-start; gap: 4px; }

  /* Contact */
  .contact-card { padding: 32px 24px; }
}