/* -------------------------------------------------------
   BRAND SYSTEM
------------------------------------------------------- */
:root {
  --k-blue-1: #C7DBFF;
  --k-blue-2: #A7C4FF;
  --k-blue-3: #7BA6FF;
  --k-blue-4: #4E7DFF;
  --k-blue-5: #1E3FAE;

  --k-text: #0A0A0A;
  --k-text-muted: #4A4A4A;
  --k-bg: #FFFFFF;
  --k-bg-alt: #F7F9FF;

  --k-radius: 12px;
  --k-max-width: 1200px;

  --k-space-xs: 0.5rem;
  --k-space-sm: 1rem;
  --k-space-md: 2rem;
  --k-space-lg: 4rem;
  --k-space-xl: 6rem;
}

/* Dark mode */
.dark {
  --k-blue-1: #E4ECFF;
  --k-blue-2: #BFD1FF;
  --k-blue-3: #8AAEFF;
  --k-blue-4: #5A7CFF;
  --k-blue-5: #2A3FAE;

  --k-text: #F5F7FF;
  --k-text-muted: #AEB7D0;
  --k-bg: #0B0E14;
  --k-bg-alt: #11151F;
}

/* -------------------------------------------------------
   GLOBAL RESET
------------------------------------------------------- */
body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: var(--k-bg);
  color: var(--k-text);
  line-height: 1.5;
}

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

.container {
  width: 100%;
  max-width: var(--k-max-width);
  margin: 0 auto;
  padding: 0 var(--k-space-sm);
  box-sizing: border-box;
}

/* -------------------------------------------------------
   HEADER
------------------------------------------------------- */
.header {
  padding: var(--k-space-sm) 0;
  border-bottom: 1px solid rgba(0,0,0,0.05);
}

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

.kelunoa-logo {
  display: flex;
  align-items: center;
  gap: var(--k-space-xs);
}

.kelunoa-wordmark {
  font-size: 1.75rem;
  font-weight: 600;
}

/* Desktop CTA */
.desktop-only {
  display: inline-block;
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-menu-btn span {
  width: 22px;
  height: 2px;
  background: var(--k-text);
  display: block;
  border-radius: 2px;
}

/* Mobile Nav */
.mobile-nav {
  display: none;
  flex-direction: column;
  background: var(--k-bg);
  border-top: 1px solid rgba(0,0,0,0.05);
  padding: var(--k-space-sm) var(--k-space-sm);
}

.mobile-nav a {
  padding: 0.75rem 0;
  font-size: 1.1rem;
  color: var(--k-text);
}

/* -------------------------------------------------------
   BUTTONS
------------------------------------------------------- */
.btn-primary,
.btn-secondary {
  padding: 0.55rem 1.1rem;
  font-size: 1rem;
  border-radius: 8px;
}

.btn-primary {
  background: var(--k-blue-5);
  color: white;
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--k-blue-5);
  color: var(--k-blue-5);
}

/* High-contrast CTA in signup section */
.signup-btn {
  background: var(--k-blue-4) !important;
  color: #ffffff !important;
  font-weight: 700;
  padding: 0.9rem 1.6rem;
  border-radius: var(--k-radius);
  border: none;
  box-shadow: 0 4px 12px rgba(0,0,0,0.25);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.signup-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.3);
}

.signup-btn:active {
  transform: translateY(0);
  box-shadow: 0 3px 8px rgba(0,0,0,0.2);
}

/* -------------------------------------------------------
   HERO
------------------------------------------------------- */
.hero {
  padding: var(--k-space-xl) 0 var(--k-space-lg);
  background: var(--k-bg-alt);
}

.hero-inner {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.hero h1 {
  font-size: clamp(1.9rem, 6vw, 2.75rem);
  line-height: 1.2;
  margin-bottom: var(--k-space-sm);
}

.hero p {
  font-size: clamp(1.05rem, 4vw, 1.25rem);
  color: var(--k-text-muted);
  margin-bottom: var(--k-space-md);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--k-space-sm);
}

.hero-cta a {
  flex: 1 1 200px;
  text-align: center;
  box-sizing: border-box;
}

/* -------------------------------------------------------
   PROBLEMS
------------------------------------------------------- */
.problems {
  padding: var(--k-space-lg) 0;
}

.problems h2 {
  text-align: center;
  margin-bottom: var(--k-space-md);
}

.problem-grid {
  display: grid;
  gap: var(--k-space-md);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.problem-card {
  padding: var(--k-space-md);
  background: var(--k-bg-alt);
  border-radius: var(--k-radius);
}

/* -------------------------------------------------------
   HYPOTHESES
------------------------------------------------------- */
.hypotheses {
  padding: var(--k-space-lg) 0;
}

.hypotheses h2 {
  text-align: center;
  margin-bottom: var(--k-space-md);
}

.hypothesis-grid {
  display: grid;
  gap: var(--k-space-md);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.hypothesis-card {
  padding: var(--k-space-md);
  background: var(--k-bg-alt);
  border-radius: var(--k-radius);
}

/* -------------------------------------------------------
   AUDIENCE
------------------------------------------------------- */
.audience {
  padding: var(--k-space-lg) 0;
  text-align: center;
}

.audience-list {
  list-style: none;
  padding: 0;
  margin: var(--k-space-md) auto 0;
  max-width: 600px;
}

.audience-list li {
  margin-bottom: 0.75rem;
}

/* -------------------------------------------------------
   FOUNDER NOTE
------------------------------------------------------- */
.founder-note {
  padding: var(--k-space-lg) 0;
  background: var(--k-bg-alt);
}

.founder-inner {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

/* -------------------------------------------------------
   SIGNUP CTA
------------------------------------------------------- */
.signup {
  padding: var(--k-space-lg) 0;
  text-align: center;
  background: var(--k-blue-5);
  color: white;
}

.signup-form {
  display: grid;
  gap: var(--k-space-sm);
  max-width: 500px;
  margin: var(--k-space-md) auto;
}

.signup-form input,
.signup-form select,
.signup-form textarea {
  padding: 0.75rem 1rem;
  border-radius: var(--k-radius);
  border: none;
  width: 100%;
  box-sizing: border-box;
}

.signup-form textarea {
  min-height: 120px;
  resize: vertical;
}

.signup-note {
  opacity: 0.85;
  margin-top: var(--k-space-sm);
}

/* -------------------------------------------------------
   FOOTER
------------------------------------------------------- */
.footer {
  padding: var(--k-space-md) 0;
  text-align: center;
  border-top: 1px solid rgba(0,0,0,0.05);
}

/* -------------------------------------------------------
   SUCCESS MODAL
------------------------------------------------------- */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.modal-content {
  background: var(--k-bg);
  padding: var(--k-space-md);
  border-radius: var(--k-radius);
  max-width: 420px;
  width: 90%;
  text-align: center;
  box-shadow: 0 8px 30px rgba(0,0,0,0.25);
}

.modal-content h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
}

.modal-content p {
  color: var(--k-text-muted);
  margin-bottom: 1.5rem;
}

/* -------------------------------------------------------
   RESPONSIVE BREAKPOINTS
------------------------------------------------------- */
@media (max-width: 768px) {

  .desktop-only {
    display: none;
  }
  
  .btn-primary,
  .btn-secondary {
    padding: 0.5rem 0.9rem;
    font-size: 0.9rem;
  }

  .hero-cta a {
    flex: none;
	width: 100%;
	padding: 0.55rem 0.9rem; /* match your button scale */
	font-size: 0.9rem;
  }

  .hero-cta {
    gap: 0.5rem;
	flex-direction: column;
    align-items: stretch;
  }

  .signup-btn {
    padding: 0.55rem 1rem !important;
    font-size: 0.9rem !important;
  }
  
  .mobile-menu-btn {
    display: flex;
  }

  .header {
    padding: var(--k-space-sm) 0;
  }

  .hero {
    padding: var(--k-space-lg) 0 var(--k-space-md);
  }

  .hero-inner {
    text-align: left;
    padding: 0 0.5rem;
  }

  .problem-grid,
  .hypothesis-grid {
    grid-template-columns: 1fr;
    gap: var(--k-space-sm);
  }

  .problem-card,
  .hypothesis-card {
    padding: 1.5rem;
  }

  .audience {
    padding: var(--k-space-lg) 0;
  }

  .founder-note {
    padding: var(--k-space-lg) 0;
  }

  .signup {
    padding: var(--k-space-lg) 0;
  }

  .signup-form {
    grid-template-columns: 1fr;
    gap: var(--k-space-sm);
  }
}