@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@300;400;500;600;700&display=swap');

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-main);
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
}

/* Containers */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-sm);
}

/* ============================
   HEADER
   ============================ */
.header {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 50;
}

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

.logo img {
  height: 62px;
}

.nav a {
  margin-right: 28px;
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

/* ============================
   BUTTONS
   ============================ */
.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--color-text);
  font-weight: 500;
  transition: all 0.2s ease;
  border: none;
}

.btn--primary {
  background: var(--color-primary);
  color: #000;
}

.btn--primary:hover {
  background: var(--color-primary-hover);
}

.btn--outline {
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

.btn--outline:hover {
  background: var(--color-primary);
  color: #000;
}

.btn--ghost {
  border: 2px solid var(--color-border);
  color: var(--color-text-muted);
}

.btn--ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ============================
   HERO SECTION
   ============================ */
.hero {
  padding: var(--space-xxl) 0 var(--space-xl);
}

.hero__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
}

.hero__content {
  max-width: 540px;
}

.hero__content h1 {
  font-size: var(--fs-h1);
  line-height: var(--lh-tight);
  margin-bottom: var(--space-md);
}

.hero__content p {
  font-size: 20px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.hero__media img {
  width: 500px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-medium);
}

/* ============================
   FEATURE GRID
   ============================ */
.features {
  padding: var(--space-xl) 0;
}

.section-title {
  text-align: center;
  font-size: var(--fs-h2);
  margin-bottom: var(--space-lg);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.feature-card {
  background: var(--color-bg-elevated);
  padding: var(--space-md);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  transition: all 0.25s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-medium);
}

.feature-card h3 {
  font-size: var(--fs-h3);
  margin-bottom: var(--space-sm);
}

.feature-card p {
  color: var(--color-text-muted);
  line-height: var(--lh-loose);
}

/* ============================
   AI SECTION
   ============================ */
.ai-section {
  padding: var(--space-xl) 0;
}

.ai__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
}

.ai__text {
  max-width: 540px;
}

.ai__text h2 {
  font-size: var(--fs-h2);
  margin-bottom: var(--space-md);
}

.ai__text ul {
  margin-bottom: var(--space-lg);
  color: var(--color-text-muted);
  line-height: var(--lh-loose);
}

.ai__media img {
  width: 480px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-medium);
}

/* ============================
   CONTACT
   ============================ */
.contact {
  padding: var(--space-xl) 0 var(--space-xxl);
}

.contact__subtitle {
  text-align: center;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.contact__form {
  max-width: 500px;
  margin: 0 auto;
  display: grid;
  gap: var(--space-sm);
}

.contact__form input,
.contact__form textarea {
  padding: 14px 18px;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: var(--fs-body);
}

.contact__form textarea {
  min-height: 140px;
  resize: vertical;
}

/* ============================
   FOOTER
   ============================ */
.footer {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-muted);
}

/* ============================
   ADAPTIVE
   ============================ */
@media (max-width: 980px) {
  .hero__inner,
  .ai__inner {
    flex-direction: column;
    text-align: center;
  }

  .hero__media img,
  .ai__media img {
    width: 100%;
    max-width: 480px;
  }

  .features__grid {
    grid-template-columns: 1fr;
  }
}