/* ===== Base ===== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Assistant', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: #f3f4f6;
  color: #111827;
  line-height: 1.7;
}

/* Layout */

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===== Header ===== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid #e5e7eb;
}

.header-inner {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-text {
  font-family: 'Rubik', system-ui, sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #111827;
  text-decoration: none;
}

.main-nav {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.main-nav a {
  font-family: 'Rubik', system-ui, sans-serif;
  font-size: 0.9rem;
  color: #374151;
  text-decoration: none;
  position: relative;
  padding-bottom: 2px;
}

.main-nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, #06b6d4, #f59e0b);
  transition: width 0.2s ease-out;
}

.main-nav a:hover::after {
  width: 100%;
}

/* Mobile nav */

.nav-toggle {
  display: none;
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}

.nav-toggle span {
  width: 20px;
  height: 2px;
  border-radius: 999px;
  background: #111827;
  transition: transform 0.18s ease, opacity 0.18s ease;
}

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

/* ===== Hero ===== */

.hero {
  padding: 4.5rem 0 4rem;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 0% 0%, rgba(56, 189, 248, 0.16), transparent 60%),
    radial-gradient(circle at 90% 100%, rgba(251, 191, 36, 0.16), transparent 60%),
    #f9fafb;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  gap: 3rem;
  align-items: center;
}

.hero-kicker {
  margin: 0 0 0.35rem;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #4f46e5;
  font-family: 'Rubik', system-ui, sans-serif;
}

.hero-text h1 {
  margin: 0 0 1rem;
  font-size: 2.2rem;
  line-height: 1.3;
  font-weight: 800;
  color: #111827;
}

.hero-subtitle {
  font-size: 1.02rem;
  max-width: 34rem;
  color: #4b5563;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.hero-note {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: #6b7280;
}

.hero-micro {
  margin-top: 1.2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  font-size: 0.8rem;
  color: #374151;
}

.hero-micro span {
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  border: 1px solid #e5e7eb;
  background: #f9fafb;
}

/* Visual card / spiral */

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

.spiral-placeholder {
  width: 100%;
  max-width: 420px;
  aspect-ratio: 16 / 10;
  border-radius: 32px;
  background: url('banner-spiral.jpg') center/cover no-repeat;
  box-shadow:
    0 20px 40px rgba(15, 23, 42, 0.18);
  border: 1px solid #e5e7eb;
}

/* ===== Buttons ===== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.7rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: 'Rubik', system-ui, sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.12s ease-out, box-shadow 0.12s, background 0.12s, color 0.12s;
}

.btn.primary {
  background: linear-gradient(135deg, #06b6d4, #f59e0b);
  color: #111827;
  box-shadow: 0 14px 30px rgba(15, 23, 42, 0.18);
}

.btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 20px 38px rgba(15, 23, 42, 0.25);
}

.btn.outline {
  background: #ffffff;
  color: #111827;
  border-color: #d1d5db;
}

.btn.outline:hover {
  background: #f3f4f6;
  transform: translateY(-1px);
}

/* ===== Sections ===== */

section {
  padding: 3.5rem 0;
}

section h2 {
  margin: 0 0 1rem;
  font-size: 1.7rem;
  font-weight: 800;
  color: #111827;
}

.section-intro {
  max-width: 38rem;
  color: #4b5563;
}

/* light section backgrounds */

.why {
  background: #ffffff;
}

.lectures {
  background: #f9fafb;
}

.benefits {
  background: #ffffff;
}

.about {
  background: #f3f4f6;
}

.testimonials {
  background: #ffffff;
}

.blog {
  background: #f9fafb;
}

/* ===== Lectures ===== */

.lecture-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.8rem;
  margin-top: 2.2rem;
}

.lecture-card {
  background: #ffffff;
  border-radius: 24px;
  padding: 1.6rem 1.4rem;
  border: 1px solid #e5e7eb;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.05);
}

.lecture-card h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1.1rem;
  color: #111827;
}

.lecture-card p {
  margin-top: 0;
  margin-bottom: 0.9rem;
  font-size: 0.96rem;
  color: #4b5563;
}

.lecture-card ul {
  margin: 0;
  padding-right: 1.15rem;
  list-style: disc;
  color: #374151;
}

.lecture-card li + li {
  margin-top: 0.3rem;
}

/* ===== Benefits ===== */

.benefits-grid {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.4rem;
}

.benefit {
  background: #ffffff;
  border-radius: 20px;
  padding: 1.3rem 1.2rem;
  border: 1px solid #e5e7eb;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.04);
}

.benefit h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  color: #111827;
}

/* ===== About ===== */

.about-inner {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  gap: 2.6rem;
  align-items: center;
}

.about-text p + p {
  margin-top: 0.65rem;
}

.about-text p {
  color: #4b5563;
}

.about-visual {
  display: flex;
  justify-content: center;
}

.portrait-placeholder {
  width: 100%;
  max-width: 320px;
  aspect-ratio: 3 / 4;
  border-radius: 28px;
  background:
    radial-gradient(circle at 10% 0%, rgba(59, 130, 246, 0.35), transparent 55%),
    radial-gradient(circle at 90% 100%, rgba(236, 72, 153, 0.35), transparent 55%),
    #e5e7eb;
  box-shadow:
    0 18px 40px rgba(15, 23, 42, 0.14),
    0 0 0 1px #e5e7eb;
}

/* ===== Testimonials ===== */

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.4rem;
  margin-top: 2rem;
}

.testimonial {
  margin: 0;
  background: #ffffff;
  border-radius: 20px;
  padding: 1.4rem 1.3rem;
  border: 1px solid #e5e7eb;
  box-shadow: 0 8px 22px rgba(15, 23, 42, 0.05);
}

.testimonial blockquote {
  margin: 0 0 0.9rem;
  font-size: 0.96rem;
  color: #111827;
}

.testimonial figcaption {
  font-size: 0.86rem;
  color: #6b7280;
}

/* ===== Blog ===== */

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.4rem;
  margin-top: 2rem;
}

.blog-card {
  background: #ffffff;
  border-radius: 20px;
  padding: 1.4rem 1.3rem;
  border: 1px solid #e5e7eb;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.05);
}

.blog-card h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  color: #111827;
}

.blog-card p {
  margin: 0;
  font-size: 0.95rem;
  color: #4b5563;
}

.blog-link {
  display: inline-flex;
  margin-top: 0.75rem;
  font-size: 0.9rem;
  color: #06b6d4;
  text-decoration: none;
}

.blog-link:hover {
  text-decoration: underline;
}

/* ===== Contact ===== */

.contact-inner {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  gap: 2.6rem;
  align-items: flex-start;
}

.contact-points {
  list-style: disc;
  padding-right: 1.15rem;
  margin: 0.8rem 0 0;
  color: #374151;
}

.contact-points li + li {
  margin-top: 0.3rem;
}

.contact-form {
  background: #ffffff;
  border-radius: 24px;
  padding: 1.6rem 1.4rem;
  border: 1px solid #e5e7eb;
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
}

.contact-form-desc {
  font-size: 0.95rem;
  color: #4b5563;
}

.clickup-placeholder {
  margin-top: 1rem;
  padding: 1.5rem 1.3rem;
  border-radius: 16px;
  border: 1px dashed #cbd5f5;
  text-align: center;
  font-size: 0.9rem;
  color: #6b7280;
}

/* ===== Footer ===== */

.site-footer {
  border-top: 1px solid #e5e7eb;
  background: #ffffff;
  padding: 1.5rem 0 2.1rem;
}

.footer-inner {
  text-align: center;
  font-size: 0.9rem;
  color: #6b7280;
}

.footer-inner p {
  margin: 0.2rem 0;
}

/* ===== Floating WhatsApp ===== */

.whatsapp-float {
  position: fixed;
  left: 1.5rem;
  bottom: 1.7rem;
  width: 52px;
  height: 52px;
  border-radius: 999px;
  background: linear-gradient(135deg, #22c55e, #16a34a);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-size: 1.3rem;
  box-shadow: 0 18px 45px rgba(22, 163, 74, 0.5);
  z-index: 40;
  transition: transform 0.12s ease-out, box-shadow 0.12s ease-out;
}

.whatsapp-float:hover {
  transform: translateY(-1px);
  box-shadow: 0 22px 55px rgba(22, 163, 74, 0.7);
}

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

@media (max-width: 900px) {
  .hero-inner,
  .about-inner,
  .contact-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero {
    padding-top: 3.5rem;
  }

  .hero-inner {
    gap: 2.4rem;
  }

  .hero-text h1 {
    font-size: 1.9rem;
  }

  .lecture-grid,
  .benefits-grid,
  .testimonials-grid,
  .blog-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .spiral-placeholder {
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  .main-nav {
    position: absolute;
    inset-inline: 0;
    top: 72px;
    flex-direction: column;
    gap: 0.75rem;
    padding: 0.9rem 1.5rem 1.3rem;
    background: #ffffff;
    border-bottom: 1px solid #e5e7eb;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.18s ease-out, opacity 0.18s ease-out;
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-toggle {
    display: flex;
  }

  .whatsapp-float {
    bottom: 1.2rem;
    left: 1.2rem;
    width: 48px;
    height: 48px;
    font-size: 1.2rem;
  }
}