/**
 * Base Styles
 * Cooking School Booking - Premium Version
 */

/* ============================================
   CSS RESET & NORMALIZATION
   ============================================ */

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

html {
  /* Set base font size for rem calculations */
  font-size: 16px;

  /* Better font rendering */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;

  /* Prevent iOS text size adjust */
  -webkit-text-size-adjust: 100%;

  /* Smooth scrolling */
  scroll-behavior: smooth;
}

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

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

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);

  /* Prevent horizontal scroll */
  overflow-x: hidden;

  /* Better text rendering */
  font-feature-settings: "kern" 1, "liga" 1;
  font-kerning: normal;

  /* Smooth theme transitions */
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Smooth transitions for theme change */
*,
*::before,
*::after {
  transition-property: background-color, border-color, color, fill, stroke, box-shadow;
  transition-duration: 0.3s;
  transition-timing-function: ease;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
  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);
}

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 {
  margin-bottom: var(--space-4);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

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

a {
  color: var(--color-primary-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-700);
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--color-primary-600);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

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

em,
i {
  font-style: italic;
}

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

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: var(--space-1) var(--space-2);
  background-color: var(--color-bg-tertiary);
  border-radius: var(--radius-sm);
  color: var(--color-primary-700);
}

pre {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  padding: var(--space-4);
  background-color: var(--color-bg-tertiary);
  border-radius: var(--radius-base);
  overflow-x: auto;
  margin-bottom: var(--space-4);
}

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

/* ============================================
   LISTS
   ============================================ */

ul,
ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

li {
  margin-bottom: var(--space-2);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

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

/* ============================================
   IMAGES & MEDIA
   ============================================ */

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

svg {
  max-width: 100%;
  height: auto;
  fill: currentColor;
}

/* ============================================
   FORMS
   ============================================ */

button,
input,
optgroup,
select,
textarea {
  font-family: inherit;
  font-size: 100%;
  line-height: inherit;
  margin: 0;
}

button,
[type="button"],
[type="reset"],
[type="submit"] {
  -webkit-appearance: button;
  cursor: pointer;
}

button:disabled,
[type="button"]:disabled,
[type="reset"]:disabled,
[type="submit"]:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

input,
textarea,
select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  border: var(--input-border-width) solid var(--color-border-medium);
  border-radius: var(--radius-base);
  transition: all var(--transition-fast);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: var(--input-focus-ring);
}

input::placeholder,
textarea::placeholder {
  color: var(--color-text-tertiary);
  opacity: 1;
}

textarea {
  resize: vertical;
  min-height: 100px;
}

label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
}

fieldset {
  border: none;
  padding: 0;
  margin: 0 0 var(--space-6) 0;
}

legend {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

/* ============================================
   TABLES
   ============================================ */

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-6);
}

th,
td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-border-light);
}

th {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  background-color: var(--color-bg-secondary);
}

tbody tr:hover {
  background-color: var(--color-bg-secondary);
}

/* ============================================
   UTILITIES
   ============================================ */

/* 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-width: 0;
}

/* Skip to main content link - accessibility */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  z-index: var(--z-index-modal);
  padding: var(--space-4) var(--space-6);
  background: var(--color-primary-600);
  color: var(--color-text-inverse);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  border-radius: 0 0 var(--radius-base) 0;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
}

/* Focus visible - for keyboard navigation */
.focus-visible:focus-visible {
  outline: 2px solid var(--color-primary-600);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Container */
.container {
  width: 100%;
  max-width: var(--content-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--content-padding);
  padding-right: var(--content-padding);
}

/* Text alignment */
.text-left {
  text-align: left;
}

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

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

/* Display utilities */
.hidden {
  display: none !important;
}

.block {
  display: block;
}

.inline-block {
  display: inline-block;
}

.flex {
  display: flex;
}

.inline-flex {
  display: inline-flex;
}

.grid {
  display: grid;
}

/* Flex utilities */
.flex-row {
  flex-direction: row;
}

.flex-col {
  flex-direction: column;
}

.items-start {
  align-items: flex-start;
}

.items-center {
  align-items: center;
}

.items-end {
  align-items: flex-end;
}

.justify-start {
  justify-content: flex-start;
}

.justify-center {
  justify-content: center;
}

.justify-end {
  justify-content: flex-end;
}

.justify-between {
  justify-content: space-between;
}

.gap-2 {
  gap: var(--space-2);
}

.gap-4 {
  gap: var(--space-4);
}

.gap-6 {
  gap: var(--space-6);
}

/* Margin utilities */
.m-0 { margin: 0; }
.mt-4 { margin-top: var(--space-4); }
.mb-4 { margin-bottom: var(--space-4); }
.ml-4 { margin-left: var(--space-4); }
.mr-4 { margin-right: var(--space-4); }

/* Padding utilities */
.p-0 { padding: 0; }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }

/* Width utilities */
.w-full {
  width: 100%;
}

.w-auto {
  width: auto;
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

@media (min-width: 640px) {
  h1 { font-size: calc(var(--font-size-4xl) * 1.1); }
  h2 { font-size: calc(var(--font-size-3xl) * 1.1); }

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

@media (min-width: 768px) {
  h1 { font-size: calc(var(--font-size-4xl) * 1.2); }
  h2 { font-size: calc(var(--font-size-3xl) * 1.2); }

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

@media (min-width: 1024px) {
  .container {
    max-width: var(--container-lg);
  }
}

@media (min-width: 1280px) {
  .container {
    max-width: var(--container-xl);
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
  *,
  *::before,
  *::after {
    background: transparent !important;
    color: #000 !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  a,
  a:visited {
    text-decoration: underline;
  }

  a[href]::after {
    content: " (" attr(href) ")";
  }

  img {
    page-break-inside: avoid;
  }

  h2,
  h3,
  p {
    orphans: 3;
    widows: 3;
  }

  h2,
  h3 {
    page-break-after: avoid;
  }
}