/* ==========================================================================
   Base — Reset, global styles, utility classes
   ---------------------------------------------------------------------------
   Color ratio guide (60-30-10):
     60%  →  off-white / white backgrounds
     30%  →  charcoal / steel-blue for structural sections
     10%  →  forest-green + cyan for accents & CTAs
   ========================================================================== */

@import url('design-tokens.css');

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

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

body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: var(--weight-regular);
  line-height: var(--leading-normal);
  color: var(--color-charcoal);
  background-color: var(--color-off-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Selection ──────────────────────────────────────────────────────────── */
::selection {
  background: var(--color-light-cyan);
}

/* ── Focus-visible (accessibility) ──────────────────────────────────────── */
:focus-visible {
  outline: 3px solid var(--color-forest-green);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* ── Skip-to-content link (keyboard navigation) ─────────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-forest-green);
  color: var(--color-white);
  padding: var(--space-3) var(--space-5);
  border-radius: 0 0 var(--border-radius-md) var(--border-radius-md);
  z-index: var(--z-modal);
  font-family: var(--font-body);
  font-weight: var(--weight-semibold);
  text-decoration: none;
  transition: top 0.2s ease-out;
}

.skip-link:focus {
  top: 0;
  color: var(--color-white);
}

/* ── Images ─────────────────────────────────────────────────────────────── */
img,
picture,
video,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

/* ── Links ──────────────────────────────────────────────────────────────── */
a {
  color: var(--color-medium-green);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-forest-green);
}

/* ── Lists ──────────────────────────────────────────────────────────────── */
ul,
ol {
  list-style: none;
}

/* ── Headings ───────────────────────────────────────────────────────────── */
h1,
h2 {
  font-family: var(--font-heading);
  line-height: var(--leading-tight);
}

h1 {
  font-size: var(--text-h1);
  color: var(--color-forest-green);
}

h2 {
  font-size: var(--text-h2);
  color: var(--color-slate-gray);
}

h3 {
  font-family: var(--font-body);
  font-size: var(--text-h3);
  font-weight: var(--weight-semibold);
  color: var(--color-charcoal);
  line-height: var(--leading-tight);
}

h4,
h5,
h6 {
  font-family: var(--font-body);
  font-weight: var(--weight-semibold);
  color: var(--color-charcoal);
  line-height: var(--leading-tight);
}

/* ── Paragraphs ─────────────────────────────────────────────────────────── */
p {
  margin-bottom: var(--space-4);
}

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

/* ── Form element inheritance ───────────────────────────────────────────── */
button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.section-padding {
  padding: var(--space-9) 0;
}

main {
  padding-top: var(--header-height);
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

/* ── Background colors ──────────────────────────────────────────────────── */
.bg-charcoal {
  background-color: var(--color-charcoal);
}

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

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

.bg-light-cyan {
  background-color: var(--color-light-cyan);
}

/* ── Text utilities ─────────────────────────────────────────────────────── */
.text-center {
  text-align: center;
}

.text-mist {
  color: var(--color-mist);
}

/* ── Screen-reader only ─────────────────────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border: none;
  border-radius: var(--border-radius-md);
  font-family: var(--font-body);
  font-size: var(--text-button);
  font-weight: var(--weight-medium);
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-base);
}

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

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

.btn-ghost {
  background-color: transparent;
  border: 2px solid var(--color-steel-blue);
  color: var(--color-steel-blue);
}

.btn-ghost:hover {
  background-color: var(--color-off-white);
  color: var(--color-forest-green);
  border-color: var(--color-forest-green);
}

.btn-white {
  background-color: var(--color-white);
  color: var(--color-forest-green);
}

.btn-white:hover {
  box-shadow: var(--shadow-md);
  color: var(--color-forest-green);
}

/* ==========================================================================
   Hi-Fi Animation System
   ---------------------------------------------------------------------------
   Premium scroll-triggered animations with spring easing and directional
   reveals. Classes are activated by adding `.is-visible` via JS.
   ========================================================================== */

/* ── Base reveal (fade + translate up) ─────────────────────────────────── */
.fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.8s cubic-bezier(0.16, 1, 0.3, 1),
    filter 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Fade down ─────────────────────────────────────────────────────────── */
.fade-down {
  opacity: 0;
  transform: translateY(-40px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.fade-down.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Fade left (slides in from the right) ──────────────────────────────── */
.fade-left {
  opacity: 0;
  transform: translateX(60px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.fade-left.is-visible {
  opacity: 1;
  transform: translateX(0);
}

/* ── Fade right (slides in from the left) ──────────────────────────────── */
.fade-right {
  opacity: 0;
  transform: translateX(-60px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.fade-right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

/* ── Scale-in (zoom from slightly smaller) ─────────────────────────────── */
.scale-in {
  opacity: 0;
  transform: scale(0.85);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.scale-in.is-visible {
  opacity: 1;
  transform: scale(1);
}

/* ── Blur reveal (blurry → sharp + fade) ───────────────────────────────── */
.blur-in {
  opacity: 0;
  filter: blur(8px);
  transform: translateY(20px);
  transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1),
    filter 0.9s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, filter, transform;
}

.blur-in.is-visible {
  opacity: 1;
  filter: blur(0);
  transform: translateY(0);
}

/* ── Slide-up with scale (card hover-ready) ────────────────────────────── */
.slide-scale-up {
  opacity: 0;
  transform: translateY(50px) scale(0.95);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.slide-scale-up.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* ── Stagger delays (applied to children for cascading reveals) ────────── */
.stagger-1 {
  transition-delay: 100ms;
}

.stagger-2 {
  transition-delay: 200ms;
}

.stagger-3 {
  transition-delay: 300ms;
}

.stagger-4 {
  transition-delay: 450ms;
}

.stagger-5 {
  transition-delay: 600ms;
}

.stagger-6 {
  transition-delay: 750ms;
}

/* ── Reduced motion preference ─────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {

  .fade-up,
  .fade-down,
  .fade-left,
  .fade-right,
  .scale-in,
  .blur-in,
  .slide-scale-up {
    transition-duration: 0.01ms !important;
    transform: none !important;
    filter: none !important;
    opacity: 1 !important;
  }
}