/* ============================================
   CoColour Life — Base Styles
   ============================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-regular);
  line-height: 1.65;
  color: var(--dark-grey);
  background-color: var(--bg-white);
  overflow-x: hidden;
}

/* Prevent scroll while landing is active */
body.landing-active {
  overflow: hidden;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: var(--weight-semibold);
  letter-spacing: -0.02em;
  color: var(--black);
}

p {
  color: var(--mid-grey);
}

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

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

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

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

::selection {
  background: rgba(0, 201, 167, 0.15);
  color: var(--black);
}

/* Container */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

/* Section base */
.section {
  padding-top: var(--space-section);
  padding-bottom: var(--space-section);
}

.section--dark {
  background: var(--charcoal);
}

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

.section--dark p,
.section--dark .section-desc {
  color: rgba(255,255,255,0.6);
}

.section--dark .section-label {
  color: var(--teal);
}

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

/* Section header */
.section-header {
  max-width: 680px;
  margin-bottom: var(--space-4xl);
}

.section-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--teal);
  margin-bottom: var(--space-md);
}

.section-title {
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-lg);
}

.section-desc {
  font-size: var(--text-lg);
  color: var(--mid-grey);
  line-height: 1.6;
}

/* Text utilities */
.text-lg {
  font-size: var(--text-lg);
  line-height: 1.6;
  color: var(--dark-grey);
}

.text-body {
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--mid-grey);
  margin-top: var(--space-md);
}

/* Gradient text */
.gradient-text {
  background: var(--gradient-rainbow-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.75rem;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  letter-spacing: 0.01em;
  border-radius: var(--radius-full);
  transition: all var(--duration-normal) var(--ease-out);
  white-space: nowrap;
}

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

.btn--primary:hover {
  background: #333;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--secondary {
  background: transparent;
  color: var(--dark-grey);
  border: 1px solid var(--border-grey);
}

.btn--secondary:hover {
  border-color: var(--dark-grey);
  transform: translateY(-1px);
}

.btn--outline {
  background: transparent;
  color: var(--dark-grey);
  border: 1px solid var(--border-grey);
  padding: 0.6rem 1.5rem;
}

.btn--outline:hover {
  border-color: var(--teal);
  color: var(--teal);
}

.btn--full {
  width: 100%;
}

/* Scroll reveal animation base */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}