/* =========================
   LifeIndex Typography
   ========================= */

/* Primary font: Atkinson Hyperlegible
   Make sure these files exist in /fonts:
   - atkinson-regular.woff2
   - atkinson-bold.woff2
*/

@font-face {
  font-family: "LifeIndex Sans";
  src: url("/fonts/atkinson-regular.woff") format("woff");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "LifeIndex Sans";
  src: url("/fonts/atkinson-bold.woff") format("woff");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* =========================
   Design Tokens
   ========================= */

:root {
  /* Typography */
  --li-font-sans: "LifeIndex Sans", system-ui, -apple-system,
    BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  /* Core palette */
  --li-color-bg:           #F8FAFC;  /* main background */
  --li-color-bg-alt:       #EEF2F7;  /* subtle section background */
  --li-color-surface:      #FFFFFF;  /* cards, header, footer */
  --li-color-text:         #0F172A;  /* primary text (deep slate) */
  --li-color-muted:        #4B5563;  /* secondary text */
  --li-color-border:       #E5E7EB;  /* borders / dividers */

  --li-color-accent:       #2563EB;  /* primary accent (cobalt blue) */
  --li-color-accent-soft:  #DBEAFE;  /* soft accent background */

  --li-color-accent-alt:   #10B981;  /* optional secondary accent (teal) */
  --li-color-danger:       #DC2626;  /* warnings / risky markers */

  /* Radii & shadows */
  --li-radius-card: 16px;
  --li-radius-pill: 999px;

  --li-shadow-soft: 0 18px 40px rgba(15, 23, 42, 0.08);
}

/* =========================
   Global Reset / Base
   ========================= */

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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--li-font-sans);
  color: var(--li-color-text);
  background-color: var(--li-color-bg);
  text-rendering: optimizeLegibility;
}

/* Layout shell for app + blog */

.li-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.li-main {
  flex: 1;
}

/* Hyperlinks */

a {
  color: var(--li-color-accent);
}

a:hover {
  text-decoration: underline;
}

/* =========================
   Header & Navigation
   ========================= */

.li-header {
  border-bottom: 1px solid var(--li-color-border);
  background-color: var(--li-color-surface);
}

.li-header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.li-logo-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--li-color-text);
}

.li-logo-mark {
  width: 28px;
  height: 28px;
  display: inline-block;
}

.li-logo-text {
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: 1.1rem;
}

/* NAV LINKS (excluding CTA) */

.li-nav {
  display: flex;
  gap: 1.25rem;
  align-items: center;
}

.li-nav a:not(.li-cta-button) {
  text-decoration: none;
  color: var(--li-color-muted);
  font-size: 0.95rem;
}

.li-nav a:not(.li-cta-button):hover {
  color: var(--li-color-text);
}

/* =========================
   Primary CTA Button
   ========================= */

:root {
  --li-color-cta: #1E40AF;
  --li-color-cta-hover: #1D4ED8;
}

.li-cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  padding: 0.6rem 1.6rem;
  border-radius: var(--li-radius-pill);
  border: 1px solid rgba(15, 23, 42, 0.12);

  background-color: var(--li-color-cta);
  color: #ffffff !important;

  font-family: var(--li-font-sans);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.01em;

  text-decoration: none;
  cursor: pointer;
  opacity: 1;
}

.li-cta-button:hover {
  background-color: var(--li-color-cta-hover);
  color: #ffffff;
}

.li-cta-button:focus-visible {
  outline: 2px solid var(--li-color-accent-soft);
  outline-offset: 2px;
}

/* =========================
   Footer
   ========================= */

.li-footer {
  border-top: 1px solid var(--li-color-border);
  background-color: var(--li-color-surface);
}

.li-footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 1rem 1.25rem;
  font-size: 0.8rem;
  color: var(--li-color-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: space-between;
}

/* =========================
   Blog Content Helpers
   ========================= */

.blog-content {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--li-color-text);
}

.blog-content p {
  margin: 0 0 1rem 0;
}

.blog-content h2,
.blog-content h3,
.blog-content h4 {
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.blog-content ul,
.blog-content ol {
  padding-left: 1.25rem;
  margin: 0 0 1rem 0;
}

.blog-content a {
  color: var(--li-color-accent);
  text-decoration: underline;
}

/* =========================
   Cards / Sections (Optional)
   ========================= */

.li-card {
  background-color: var(--li-color-surface);
  border-radius: var(--li-radius-card);
  border: 1px solid var(--li-color-border);
  box-shadow: var(--li-shadow-soft);
  padding: 1.5rem;
}

/* For subtle highlighted sections */
.li-section-alt {
  background-color: var(--li-color-bg-alt);
}

/* =========================
   Responsive tweaks (basic)
   ========================= */

@media (max-width: 640px) {
  .li-header-inner {
    padding: 0.6rem 1rem;
  }

  .li-nav {
    gap: 0.75rem;
  }

  .li-footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}