/*
 * Frakthubben Experience Alpha
 * Fas 3: base.css
 *
 * Grundläggande reset, typografi, tillgänglighet och globala element.
 * Komponent- och layoutspecifik styling kommer i senare faser.
 */

/* Minimal modern reset */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
  font-synthesis: none;
}

body {
  margin: 0;
  min-width: 20rem;
  min-height: 100vh;
  background: var(--color-background);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-body);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  display: block;
}

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

img,
video {
  height: auto;
}

input,
button,
textarea,
select {
  margin: 0;
  color: inherit;
  font: inherit;
}

button,
[role="button"] {
  cursor: pointer;
}

button:disabled,
input:disabled,
select:disabled,
textarea:disabled {
  cursor: not-allowed;
}

textarea {
  resize: vertical;
}

fieldset {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

legend {
  padding: 0;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

[hidden] {
  display: none !important;
}

/* Text rhythm */
h1,
h2,
h3,
h4,
h5,
h6,
p,
ul,
ol,
dl,
blockquote,
figure {
  margin-top: 0;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  max-width: 24ch;
  margin-bottom: var(--space-4);
  color: var(--color-text);
  font-family: var(--font-display);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-heading);
  letter-spacing: var(--letter-spacing-heading);
  text-wrap: balance;
}

h1 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-extrabold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
}

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

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

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

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

h6 {
  font-size: var(--font-size-md);
}

p,
li,
dd,
dt,
figcaption,
blockquote {
  max-width: 72ch;
}

p {
  margin-bottom: var(--space-5);
  color: var(--color-text-muted);
  text-wrap: pretty;
}

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

ul,
ol {
  margin-bottom: var(--space-5);
  padding-left: 1.25rem;
}

li + li {
  margin-top: var(--space-2);
}

strong,
b {
  color: inherit;
  font-weight: var(--font-weight-semibold);
}

small {
  font-size: var(--font-size-sm);
}

mark {
  padding: 0.08em 0.22em;
  border-radius: 0.25em;
  background: var(--color-amber-100);
  color: var(--color-text);
}

code,
kbd,
samp,
pre {
  font-family: var(--font-mono);
}

code {
  padding: 0.14em 0.35em;
  border-radius: 0.35em;
  background: var(--color-ink-100);
  color: var(--color-ink-800);
  font-size: 0.92em;
}

pre {
  max-width: 100%;
  overflow-x: auto;
  padding: var(--space-5);
  border: var(--border);
  border-radius: var(--radius-md);
  background: var(--color-ink-950);
  color: var(--color-text-on-dark);
}

pre code {
  padding: 0;
  background: transparent;
  color: inherit;
}

blockquote {
  margin-right: 0;
  margin-bottom: var(--space-6);
  margin-left: 0;
  padding-left: var(--space-6);
  border-left: 0.25rem solid var(--color-primary);
  color: var(--color-text);
}

blockquote p {
  color: inherit;
  font-size: var(--font-size-md);
}

blockquote footer {
  margin-top: var(--space-3);
  color: var(--color-text-subtle);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

hr {
  margin: var(--space-12) 0;
  border: 0;
  border-top: var(--border);
}

/* Links */
a {
  color: inherit;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.16em;
}

a:hover {
  text-decoration-thickness: 0.12em;
}

a:not([class]) {
  color: var(--color-secondary);
}

a:not([class]):hover {
  color: var(--color-secondary-hover);
}

/* Focus and keyboard accessibility */
:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

::selection {
  background: var(--color-orange-200);
  color: var(--color-ink-950);
}

.skip-link {
  position: fixed;
  top: var(--space-3);
  left: var(--space-3);
  z-index: var(--z-modal);
  transform: translateY(-180%);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  background: var(--color-ink-950);
  color: var(--color-text-on-dark);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  box-shadow: var(--shadow-md);
  transition: transform var(--duration-fast) var(--ease-standard);
}

.skip-link:focus {
  transform: translateY(0);
}

/* Form foundations */
label {
  display: inline-block;
  margin-bottom: var(--space-2);
  color: var(--color-text);
  font-weight: var(--font-weight-semibold);
}

input,
textarea,
select {
  width: 100%;
  min-height: 3rem;
  padding: 0.75rem 0.9rem;
  border: var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  transition:
    border-color var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard),
    background-color var(--duration-fast) var(--ease-standard);
}

textarea {
  min-height: 8rem;
}

input::placeholder,
textarea::placeholder {
  color: var(--color-ink-400);
}

input:hover,
textarea:hover,
select:hover {
  border-color: var(--color-ink-400);
}

input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  border-color: var(--color-focus);
  outline: none;
  box-shadow: var(--shadow-focus);
}

/* Helpful global utility states */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.no-scroll {
  overflow: hidden;
}

/* Dark sections inherit readable defaults */
.section--dark,
.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4,
.section--dark h5,
.section--dark h6 {
  color: var(--color-text-on-dark);
}

.section--dark p,
.section--dark li,
.section--dark blockquote footer {
  color: rgba(255, 255, 255, 0.74);
}

.section--dark strong {
  color: #ffffff;
}

/* Mobile readability */
@media (max-width: 48rem) {
  body {
    font-size: 1rem;
  }

  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    max-width: 100%;
  }

  p,
  li,
  dd,
  dt,
  figcaption,
  blockquote {
    max-width: 100%;
  }

  blockquote {
    padding-left: var(--space-4);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}