/**
 * Base Styles
 * 
 * Foundational styles for HTML elements
 * Reset inconsistencies and establish typography baseline
 */

/* ============================================
   MODERN CSS RESET
   ============================================ */

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-size: 16px;
  line-height: var(--line-height-normal);
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  color: var(--color-text-primary) !important;
  background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%) !important;
  min-height: 100vh;
  overflow-x: hidden;
}

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

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

h1 {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-6);
}

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-base);
  font-weight: var(--font-weight-semibold);
}

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

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

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

em, i {
  font-style: italic;
}

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

/* ============================================
   LINKS
   ============================================ */

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

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

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

a:active {
  color: var(--color-primary-dark);
}

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

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

ul {
  list-style-type: disc;
}

ol {
  list-style-type: decimal;
}

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

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

/* Unstyled lists */
ul.list-unstyled,
ol.list-unstyled {
  list-style: none;
  padding-left: 0;
}

/* ============================================
   CODE & PRE
   ============================================ */

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--color-code-bg);
  color: var(--color-terminal-text);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-code-border);
}

pre {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  background-color: var(--color-terminal-bg);
  color: var(--color-terminal-text);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  margin-bottom: var(--space-4);
  border: 1px solid var(--color-code-border);
  line-height: var(--line-height-relaxed);
}

pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: inherit;
  color: inherit;
}

/* ============================================
   BLOCKQUOTES
   ============================================ */

blockquote {
  margin: var(--space-6) 0;
  padding: var(--space-4) var(--space-6);
  border-left: 4px solid var(--color-primary);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-md);
  font-style: italic;
  color: var(--color-text-secondary);
}

blockquote p {
  margin-bottom: var(--space-2);
}

blockquote cite {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--font-size-sm);
  font-style: normal;
  color: var(--color-text-tertiary);
}

blockquote cite::before {
  content: "— ";
}

/* ============================================
   HORIZONTAL RULE
   ============================================ */

hr {
  border: none;
  border-top: 1px solid var(--color-border-light);
  margin: var(--space-8) 0;
}

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

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

img {
  border-radius: var(--radius-md);
}

figure {
  margin: var(--space-6) 0;
}

figcaption {
  margin-top: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  text-align: center;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-6);
  background-color: var(--color-bg-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

thead {
  background-color: var(--color-bg-secondary);
}

th {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  color: var(--color-text-primary) !important;
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  border-bottom: 2px solid var(--color-border-medium);
}

td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text-secondary) !important;
}

tbody tr:last-child td {
  border-bottom: none;
}

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

/* ============================================
   FORMS - BASE ELEMENTS
   ============================================ */

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

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="tel"],
input[type="url"],
input[type="search"],
input[type="date"],
input[type="time"],
input[type="datetime-local"],
textarea,
select,
.form-control,
.form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  color: var(--color-text-primary) !important;
  background-color: var(--color-bg-input) !important;
  background-image: none;
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: none;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
input[type="tel"]:focus,
input[type="url"]:focus,
input[type="search"]:focus,
input[type="date"]:focus,
input[type="time"]:focus,
input[type="datetime-local"]:focus,
textarea:focus,
select:focus,
.form-control:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.2);
  background-color: var(--color-bg-input) !important;
  color: var(--color-text-primary) !important;
}

/* Override browser autofill globally */
input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus,
input:-webkit-autofill:active,
textarea:-webkit-autofill,
select:-webkit-autofill,
.form-control:-webkit-autofill,
.form-control:-webkit-autofill:hover,
.form-control:-webkit-autofill:focus,
.form-control:-webkit-autofill:active {
  -webkit-box-shadow: 0 0 0 1000px var(--color-bg-input) inset !important;
  -webkit-text-fill-color: var(--color-text-primary) !important;
  border-color: var(--color-border-medium);
  transition: background-color 5000s ease-in-out 0s;
}

input[type="text"]:disabled,
input[type="email"]:disabled,
input[type="password"]:disabled,
textarea:disabled,
select:disabled {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-tertiary);
  cursor: not-allowed;
}

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

select {
  cursor: pointer;
}

/* Checkboxes and Radio Buttons */
input[type="checkbox"],
input[type="radio"] {
  width: 1rem;
  height: 1rem;
  margin-right: var(--space-2);
  cursor: pointer;
  accent-color: var(--color-primary);
}

/* ============================================
   BUTTONS - BASE
   ============================================ */

button,
[type="button"],
[type="submit"],
[type="reset"] {
  font-family: var(--font-primary);
  cursor: pointer;
}

button:disabled,
[type="button"]:disabled,
[type="submit"]:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

/* ============================================
   UTILITY CLASSES - BASE
   ============================================ */

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

@media (min-width: 640px) {
  .container {
    padding: 0 var(--space-6);
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 var(--space-8);
  }
}

/* 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;
}