/* ─── Design System ─── */
:root {
  --color-primary: #2563EB;
  --color-primary-dark: #1D4ED8;
  --color-on-primary: #FFFFFF;
  --color-secondary: #3B82F6;
  --color-accent: #059669;
  --color-accent-dark: #047857;
  --color-background: #F8FAFC;
  --color-foreground: #0F172A;
  --color-muted: #F1F5FD;
  --color-border: #E4ECFC;
  --color-text-secondary: #475569;
  --color-text-tertiary: #94A3B8;
  --color-destructive: #DC2626;
  --color-ring: #2563EB;

  --font-heading: 'Rubik', sans-serif;
  --font-body: 'Nunito Sans', sans-serif;

  --radius: 12px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  color: var(--color-foreground);
  background-color: var(--color-background);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ─── Utilities ─── */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* ─── Typography ─── */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.text-center { text-align: center; }

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  transition: all 200ms ease;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-on-primary);
  box-shadow: var(--shadow-md);
}
.btn-primary:hover {
  background-color: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.btn-primary:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}
.btn-secondary:hover {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  transform: translateY(-2px);
}
.btn-secondary:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.btn-large {
  padding: 1rem 2.5rem;
  font-size: 1.125rem;
}

/* ─── Navbar ─── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(248, 250, 252, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 200ms ease, box-shadow 200ms ease;
}

.navbar.scrolled {
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

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

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.03em;
}

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

.nav-links a {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  transition: color 200ms ease;
  position: relative;
}
.nav-links a:hover {
  color: var(--color-primary);
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width 200ms ease;
}
.nav-links a:hover::after {
  width: 100%;
}

.nav-links a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
  border-radius: 4px;
}

/* Mobile hamburger */
.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: var(--color-foreground);
  border-radius: 2px;
  transition: all 250ms ease;
  transform-origin: center;
}
.hamburger.active span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
}
.hamburger.active span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}
.hamburger:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 6px;
}

/* Mobile menu overlay */
.mobile-menu {
  position: fixed;
  inset: 64px 0 0 0;
  background: rgba(248, 250, 252, 0.97);
  backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  list-style: none;
  opacity: 0;
  pointer-events: none;
  transition: opacity 250ms ease;
  z-index: 999;
}
.mobile-menu.open {
  opacity: 1;
  pointer-events: auto;
}
.mobile-menu a {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-foreground);
  padding: 0.75rem 1.5rem;
}
.mobile-menu a:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 4px;
  border-radius: 6px;
}

/* ─── Hero ─── */
.hero {
  position: relative;
  padding-top: 140px;
  padding-bottom: 100px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -10%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -10%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(5, 150, 105, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-muted);
  color: var(--color-primary);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.375rem 1rem;
  border-radius: var(--radius-pill);
  margin-bottom: 1.5rem;
  border: 1px solid var(--color-border);
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  color: var(--color-foreground);
  margin-bottom: 1.25rem;
}
.hero h1 .accent {
  color: var(--color-primary);
}

.hero p.subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
  max-width: 560px;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ─── Section generic ─── */
.section {
  padding: 80px 0;
}
.section-alt {
  background: var(--color-muted);
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 1rem;
}
.section-desc {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  text-align: center;
  max-width: 600px;
  margin: 0 auto 3rem;
}

/* ─── Pain Points ─── */
.pain-quote {
  background: linear-gradient(135deg, #fff 0%, var(--color-muted) 100%);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 1.75rem;
  margin-bottom: 1.5rem;
  font-size: 1.125rem;
  font-style: italic;
  color: var(--color-foreground);
  position: relative;
}
.pain-quote::before {
  content: "\"";
  font-family: Georgia, serif;
  font-size: 3.5rem;
  color: var(--color-primary);
  line-height: 1;
  position: absolute;
  top: 0.5rem;
  left: 0.75rem;
  opacity: 0.2;
}

.pain-body {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  max-width: 720px;
}

/* ─── Features ─── */
.features-grid {
  display: grid;
  gap: 1.5rem;
  max-width: 1000px;
  margin: 0 auto;
}

.feature-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: all 250ms ease;
  position: relative;
  overflow: hidden;
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary);
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  opacity: 0;
  transition: opacity 250ms ease;
}
.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-muted);
  border-radius: 14px;
  margin-bottom: 1.25rem;
  font-size: 1.75rem;
}

.feature-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--color-foreground);
}
.feature-card p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ─── Testimonials ─── */
.testimonials-grid {
  display: grid;
  gap: 1.5rem;
  max-width: 1000px;
  margin: 0 auto;
}

.testimonial-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: all 250ms ease;
}
.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.testimonial-stars {
  display: flex;
  gap: 2px;
  margin-bottom: 0.875rem;
}
.testimonial-stars svg {
  width: 18px;
  height: 18px;
  fill: #F59E0B;
  stroke: #F59E0B;
  stroke-width: 1.5;
}

.testimonial-quote {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 1.25rem;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 0.875rem;
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.testimonial-name {
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-foreground);
}
.testimonial-role {
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
}

/* ─── CTA Section ─── */
.cta-section {
  position: relative;
  padding: 100px 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, #1e40af 100%);
  color: #fff;
  text-align: center;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.cta-section .section-title {
  color: #fff;
  position: relative;
  z-index: 1;
}
.cta-section .section-desc {
  color: rgba(255,255,255,0.85);
  position: relative;
  z-index: 1;
}
.cta-section .btn-primary {
  background: #fff;
  color: var(--color-primary);
  position: relative;
  z-index: 1;
}
.cta-section .btn-primary:hover {
  background: var(--color-muted);
  color: var(--color-primary-dark);
}

/* ─── Footer ─── */
.footer {
  padding: 2rem 0;
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
  border-top: 1px solid var(--color-border);
}

/* ─── Scroll Reveal ─── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 450ms ease, transform 450ms ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Responsive ─── */
@media (min-width: 768px) {
  .hamburger { display: none; }
  .nav-links { display: flex; }
  .mobile-menu { display: none !important; }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .testimonials-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .hero {
    padding-top: 160px;
    padding-bottom: 120px;
  }
}

/* ─── Register Page ─── */
.register-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem;
  background: var(--color-background);
}

.register-card {
  width: 100%;
  max-width: 480px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-lg);
}

.register-logo {
  display: block;
  text-align: center;
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.03em;
  margin-bottom: 1.75rem;
}
.register-logo:hover {
  opacity: 0.8;
}
.register-logo:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 4px;
  border-radius: 4px;
}

.register-title {
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  color: var(--color-foreground);
  margin-bottom: 0.375rem;
}

.register-subtitle {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: 1.75rem;
}

.register-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-foreground);
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: var(--color-foreground);
  background: #fff;
  border: 1.5px solid var(--color-border);
  border-radius: 10px;
  outline: none;
  transition: border-color 200ms ease, box-shadow 200ms ease;
}
.form-input::placeholder {
  color: var(--color-text-tertiary);
}
.form-input:hover {
  border-color: #c4d0f5;
}
.form-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}
.form-input:focus-visible {
  outline: 2px solid var(--color-ring);
  outline-offset: 1px;
}

.form-hint {
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
  margin-top: 0.125rem;
}

.form-group-checkbox {
  flex-direction: row;
  align-items: flex-start;
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  cursor: pointer;
}

.form-checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--color-primary);
  flex-shrink: 0;
  cursor: pointer;
}

.form-checkbox-label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}
.form-checkbox-label a {
  color: var(--color-primary);
  text-decoration: underline;
  font-weight: 500;
}
.form-checkbox-label a:hover {
  color: var(--color-primary-dark);
}
.form-checkbox-label a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 2px;
}

.btn-full {
  width: 100%;
  padding: 0.875rem;
  font-size: 1rem;
  margin-top: 0.5rem;
}

.register-footer {
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}
.register-footer a {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: underline;
}
.register-footer a:hover {
  color: var(--color-primary-dark);
}
.register-footer a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Register page responsive */
@media (max-width: 480px) {
  .register-card {
    padding: 2rem 1.25rem;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}