/* ============================================
   RyterAi — Base Styles & Reset
   ============================================ */

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

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

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.menu-open {
  overflow: hidden;
}

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

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

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

ul, ol {
  list-style: none;
}

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

::selection {
  background: rgba(37, 99, 235, 0.15);
  color: var(--color-dark);
}

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-dark);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
}

h1 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-extrabold);
}

h2 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

h5 {
  font-size: var(--font-size-lg);
}

p {
  margin-bottom: var(--space-4);
  line-height: var(--line-height-relaxed);
}

p:last-child {
  margin-bottom: 0;
}

/* ── Layout ── */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
  width: 100%;
}

.container--narrow {
  max-width: var(--container-narrow);
}

.container--wide {
  max-width: var(--container-wide);
}

.section {
  padding: var(--space-20) 0;
  position: relative;
}

.section--dark {
  background-color: var(--color-bg-dark);
  color: var(--color-white);
}

.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: var(--color-white);
}

.section--gray {
  background-color: var(--color-bg);
}

.section--gradient {
  background: var(--gradient-hero);
  color: var(--color-white);
}

.section--gradient h2,
.section--gradient h3 {
  color: var(--color-white);
}

/* ── Utility Classes ── */
.text-center {
  text-align: center;
}

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

.text-muted {
  color: var(--color-text-light);
}

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-label {
  display: inline-block;
  text-transform: uppercase;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wider);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.section--gradient .section-label,
.section--dark .section-label,
.hero .section-label {
  color: rgba(255, 255, 255, 0.7);
}

.section-title {
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  max-width: 700px;
  line-height: var(--line-height-relaxed);
}

.text-center .section-subtitle {
  margin-left: auto;
  margin-right: auto;
}

.section-header {
  margin-bottom: var(--space-12);
}

/* ── Scroll Animations ── */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.animate-on-scroll:nth-child(2) { transition-delay: 0.1s; }
.animate-on-scroll:nth-child(3) { transition-delay: 0.2s; }
.animate-on-scroll:nth-child(4) { transition-delay: 0.3s; }
.animate-on-scroll:nth-child(5) { transition-delay: 0.4s; }
.animate-on-scroll:nth-child(6) { transition-delay: 0.5s; }
.animate-on-scroll:nth-child(7) { transition-delay: 0.6s; }
.animate-on-scroll:nth-child(8) { transition-delay: 0.7s; }

/* ── Responsive Typography ── */
@media (min-width: 768px) {
  h1 {
    font-size: var(--font-size-5xl);
  }

  h2 {
    font-size: var(--font-size-4xl);
  }

  .section {
    padding: var(--space-24) 0;
  }
}

@media (min-width: 1024px) {
  h1 {
    font-size: var(--font-size-6xl);
  }
}