/* ==========================================================================
   Fluid Scaling System — Aurae (Figma frame: 1280px)
   ========================================================================== */

:root {
  --size-unit: 16;
  --size-container-ideal: 1280;
  --size-container-min: 992px;
  --size-container-max: 1280px;
  --size-container: clamp(var(--size-container-min), 100vw, var(--size-container-max));
  --size-font: calc(var(--size-container) / (var(--size-container-ideal) / var(--size-unit)));
  --container-padding: 1.75em; /* 28px */
}

/* Tablet */
@media screen and (max-width: 991px) {
  :root {
    --size-container-ideal: 834;
    --size-container-min: 768px;
    --size-container-max: 991px;
    --container-padding: 1.5em;
  }
}

/* Mobile Landscape */
@media screen and (max-width: 767px) {
  :root {
    --size-container-ideal: 550;
    --size-container-min: 480px;
    --size-container-max: 767px;
    --container-padding: 1em;
  }
}

/* Mobile Portrait */
@media screen and (max-width: 479px) {
  :root {
    --size-container-ideal: 390;
    --size-container-min: 320px;
    --size-container-max: 479px;
    --container-padding: 1em;
  }
}

/* ==========================================================================
   Design Tokens — Aurae
   ========================================================================== */

:root {
  /* Colors */
  --color-text-title: #131313;
  --color-text-body: #585858;
  --color-text-accent: rgba(19, 19, 19, 0.4);
  --color-text-muted: #c8c8c8;
  --color-text-white: #ffffff;
  --color-bg-white: #ffffff;
  --color-bg-gray: #f5f5f5;
  --color-bg-dark: #151614;
  --color-button-secondary: #d5dccf;
  --color-border: #d9d9d9;
  --color-decor: rgba(19, 19, 19, 0.2);

  /* Typography — Nacelle alt: Manrope; Libre Caslon Condensed alt: Libre Caslon Text italic */
  --font-body: "Manrope", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-heading: "Manrope", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-italic: "Libre Caslon Text", "Cormorant Garamond", Georgia, serif;

  /* Spacing scale */
  --spacing-xs: 0.25em;
  --spacing-sm: 0.5em;
  --spacing-md: 1em;
  --spacing-lg: 1.5em;
  --spacing-xl: 2em;
  --spacing-2xl: 2.5em;
  --spacing-3xl: 3em;
  --spacing-4xl: 3.25em;
  --spacing-5xl: 4em;
  --spacing-section: 3.25em; /* 52px */

  /* Border radius */
  --radius-sm: 0.5em;   /* 8px */
  --radius-md: 1em;     /* 16px */
  --radius-pill: 3em;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

/* ==========================================================================
   Reset
   ========================================================================== */

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

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

body {
  font-family: var(--font-body);
  font-size: var(--size-font);
  color: var(--color-text-body);
  background-color: var(--color-bg-white);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 400;
  color: var(--color-text-title);
  line-height: 1.1;
  overflow-wrap: break-word;
}

p {
  overflow-wrap: break-word;
}

em,
.italic {
  font-family: var(--font-italic);
  font-style: italic;
  font-weight: 400;
}

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

.container {
  width: 100%;
  max-width: var(--size-container);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  padding: 0.5em 1em;
  font-family: var(--font-body);
  font-size: 0.875em; /* 14px */
  font-weight: 400;
  line-height: 1.428;
  letter-spacing: -0.42px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
  transition: opacity var(--transition-base), transform var(--transition-base);
}

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

.btn-light {
  background-color: var(--color-bg-white);
  color: var(--color-text-title);
}

.btn-secondary {
  background-color: var(--color-button-secondary);
  color: var(--color-text-title);
}

.btn:hover {
  opacity: 0.88;
  transform: translateY(-1px);
}

/* ==========================================================================
   Focus & Accessibility
   ========================================================================== */

:focus-visible {
  outline: 2px solid var(--color-text-title);
  outline-offset: 2px;
}

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}