/**
 * Jyot Institute of Teachers Training (JITT)
 * Base Stylesheet, Reset, and Typography
 * File: assets/css/base.css
 */

/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

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

/* HTML and Document Root */
html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  font-family: var(--font-family-body);
  font-weight: var(--fw-normal);
  color: var(--color-text-body);
  background-color: var(--color-bg-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Selection Styling */
::selection {
  background-color: var(--color-primary-light);
  color: var(--color-text-inverse);
}

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

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

a:hover {
  color: var(--color-primary-light);
}

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-xs);
}

/* Form Element Defaults */
input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

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

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

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  color: var(--color-text-heading);
  font-weight: var(--fw-bold);
  line-height: 1.2;
  letter-spacing: -0.015em;
}

h1 {
  font-size: clamp(2.25rem, 4.5vw, 3.5rem);
  line-height: 1.15;
  font-weight: var(--fw-extrabold);
}

h2 {
  font-size: clamp(1.75rem, 3.2vw, 2.5rem);
  line-height: 1.25;
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  line-height: 1.35;
}

h4 {
  font-size: 1.25rem;
  line-height: 1.4;
}

h5 {
  font-size: 1.125rem;
  line-height: 1.45;
}

h6 {
  font-size: 1rem;
  line-height: 1.5;
}

p {
  margin-bottom: var(--space-4);
}

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

.lead {
  font-size: clamp(1.05rem, 1.3vw, 1.2rem);
  line-height: 1.6;
  color: var(--color-text-body);
}

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

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

/* Section Wrapper Standard */
.section {
  padding-top: var(--section-padding-y);
  padding-bottom: var(--section-padding-y);
  position: relative;
}

.section-sm {
  padding-top: var(--section-padding-y-sm);
  padding-bottom: var(--section-padding-y-sm);
}

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

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

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

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

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

.bg-dark h1,
.bg-dark h2,
.bg-dark h3,
.bg-dark h4 {
  color: var(--color-text-inverse);
}

.bg-dark p {
  color: var(--color-text-inverse-muted);
}

/* Section Header Component */
.section-header {
  margin-bottom: var(--space-12);
  text-align: center;
}

.section-header.text-left {
  text-align: left;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.35rem 0.9rem;
  background-color: var(--color-primary-surface);
  color: var(--color-primary);
  border: 1px solid rgba(var(--color-primary-rgb), 0.15);
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.section-badge.badge-secondary {
  background-color: var(--color-secondary-surface);
  color: var(--color-secondary-dark);
  border-color: rgba(var(--color-secondary-rgb), 0.2);
}

.section-badge.badge-accent {
  background-color: var(--color-accent-surface);
  color: var(--color-accent-hover);
  border-color: rgba(var(--color-accent-rgb), 0.2);
}

.section-title {
  margin-bottom: var(--space-3);
}

.section-subtitle {
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
  font-size: 1.0625rem;
  color: var(--color-text-muted);
}

.section-header.text-left .section-subtitle {
  margin-left: 0;
}

/* Accessibility: 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 link */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-sm);
  z-index: 9999;
  font-weight: var(--fw-semibold);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
}

/* Animation accessibility */
@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;
    scroll-behavior: auto !important;
  }
}