/**
 * Dr. Anil Kumar's Eye Hospital ("drakeh") Base Stylesheet
 * =======================================================
 * Includes a modern CSS reset, accessible focus styles, base element
 * typography with fluid clamp() scales, .prose readability container,
 * table scroll wrapper, checklists, numbered steps, and error page primitives.
 */

/* --------------------------------------------------------------------------
 * Modern CSS Reset
 * ----------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  tab-size: 4;
}

body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

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

p,
h1,
h2,
h3,
h4,
h5,
h6 {
  overflow-wrap: break-word;
}

/* --------------------------------------------------------------------------
 * Accessible Focus Styles
 * Never suppress outline without an accessible visible replacement.
 * ----------------------------------------------------------------------- */
:focus {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--color-blue-600);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
 * Typography & Headings
 * Editorial display serif headings paired with clean sans body font.
 * Fluid clamp() scale across mobile (<640px) to desktop (>1024px).
 * ----------------------------------------------------------------------- */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  color: var(--color-navy-900);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
}

h1 {
  font-size: clamp(2.25rem, 5vw + 0.8rem, 3.75rem);
  letter-spacing: -0.025em;
  margin-bottom: var(--space-4);
}

h2 {
  font-size: clamp(1.75rem, 3.5vw + 0.5rem, 2.75rem);
  letter-spacing: -0.02em;
  line-height: var(--lh-snug);
  margin-bottom: var(--space-3);
}

h3 {
  font-size: clamp(1.35rem, 2vw + 0.5rem, 2rem);
  letter-spacing: -0.015em;
  line-height: var(--lh-snug);
  margin-bottom: var(--space-3);
}

h4 {
  font-size: clamp(1.15rem, 1.5vw + 0.5rem, 1.5rem);
  line-height: var(--lh-snug);
  margin-bottom: var(--space-2);
}

h5 {
  font-size: var(--fs-lg);
  line-height: var(--lh-snug);
  margin-bottom: var(--space-2);
}

h6 {
  font-size: var(--fs-md);
  line-height: var(--lh-snug);
  margin-bottom: var(--space-1);
}

p {
  margin-bottom: var(--space-4);
  color: var(--color-text);
  max-width: 70ch;
}

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

/* --------------------------------------------------------------------------
 * Links
 * ----------------------------------------------------------------------- */
a {
  color: var(--color-blue-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* --------------------------------------------------------------------------
 * Lists & Horizontal Rule
 * ----------------------------------------------------------------------- */
ul,
ol {
  padding-left: var(--space-6);
  margin-bottom: var(--space-4);
}

li {
  margin-bottom: var(--space-1);
}

hr {
  border: 0;
  height: 1px;
  background-color: var(--color-border);
  margin: var(--space-8) 0;
}

/* --------------------------------------------------------------------------
 * Long Word & URL Wrapping
 * Prevents horizontal layout blowouts on narrow viewports
 * ----------------------------------------------------------------------- */
a, code, pre, .prose p, .prose li {
  word-break: break-word;
  overflow-wrap: anywhere;
}

/* --------------------------------------------------------------------------
 * .prose Readability Container (~70ch Line Length)
 * Standardized typography rhythm for articles, legal, generic CMS pages
 * ----------------------------------------------------------------------- */
.prose {
  max-width: 70ch;
  color: var(--color-text);
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
}

.prose h1,
.prose h2,
.prose h3,
.prose h4 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}

.prose h1:first-child,
.prose h2:first-child,
.prose h3:first-child {
  margin-top: 0;
}

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

.prose ul,
.prose ol {
  margin-top: var(--space-2);
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

.prose li {
  margin-bottom: var(--space-2);
}

.prose blockquote {
  border-left: 4px solid var(--color-blue-600);
  padding-left: var(--space-4);
  font-style: italic;
  color: var(--color-text-muted);
  margin: var(--space-6) 0;
}

/* --------------------------------------------------------------------------
 * Tables inside Scroll Wrapper with Scroll Hint
 * Hard requirement: responsive table wrapping with horizontal scroll hints
 * ----------------------------------------------------------------------- */
.table-scroll-wrapper {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: var(--space-6) 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: #FFFFFF;
}

.table-scroll-hint {
  display: block;
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  padding: var(--space-1) var(--space-3);
  background-color: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border-subtle);
  text-align: right;
}

@media (min-width: 768px) {
  .table-scroll-hint {
    display: none;
  }
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: var(--fs-sm);
}

th,
td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border-subtle);
  vertical-align: top;
}

th {
  background-color: var(--color-bg-alt);
  font-weight: var(--fw-semibold);
  color: var(--color-navy-900);
}

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

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

/* --------------------------------------------------------------------------
 * Checklists & Numbered Steps Components
 * ----------------------------------------------------------------------- */
.checklist {
  list-style: none;
  padding: 0;
  margin: var(--space-4) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.checklist li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: 0;
}

.checklist-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--color-green-accent-light);
  margin-top: 2px;
}

.numbered-steps {
  list-style: none;
  counter-reset: step-counter;
  padding: 0;
  margin: var(--space-6) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.step-item {
  counter-increment: step-counter;
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: 0;
}

.step-num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-blue-50);
  color: var(--color-blue-600);
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: var(--fs-sm);
  border: 1px solid rgba(5, 101, 230, 0.2);
}

.step-text {
  flex-grow: 1;
}

.step-title {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: var(--space-1);
}

.step-desc {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: var(--lh-relaxed);
  margin: 0;
}

/* --------------------------------------------------------------------------
 * Error Page Component (.error-page)
 * Clean layout for 404, 410, and 500 error pages
 * ----------------------------------------------------------------------- */
.error-page {
  padding-top: clamp(3rem, 6vw, 6rem);
  padding-bottom: clamp(4rem, 8vw, 8rem);
}

.error-card {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
  padding: var(--space-8);
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.error-code {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-blue-600);
  background-color: var(--color-blue-50);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-3);
}

.error-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--color-heading);
  line-height: var(--lh-tight);
  margin-bottom: var(--space-3);
}

.error-desc {
  font-size: var(--fs-md);
  color: var(--color-text-muted);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-6);
  max-width: 50ch;
  margin-left: auto;
  margin-right: auto;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.error-quick-links {
  border-top: 1px solid var(--color-border-subtle);
  padding-top: var(--space-6);
  text-align: left;
}

.error-quick-links-title {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-navy-900);
  margin-bottom: var(--space-3);
}

.error-links-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
}

@media (min-width: 480px) {
  .error-links-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

.error-link-item a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-sm);
  color: var(--color-blue-600);
}