:root {
  --iv-bg: #F8FAFC;
  --iv-surface: #FFFFFF;
  --iv-surface-alt: #F1F5F9;
  --iv-text: #111827;
  --iv-text-soft: #475569;
  --iv-heading: #0F172A;
  --iv-border: #E2E8F0;
  --iv-border-strong: #CBD5E1;
  --iv-primary: #0F172A;
  --iv-primary-2: #1E293B;
  --iv-accent: #2563EB;
}

body {
  margin: 0;
  font-family: Inter, Roboto, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--iv-text);
  background: var(--iv-bg);
}

.iv-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

.iv-header {
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--iv-border);
}

.iv-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.iv-header a {
  text-decoration: none;
  color: var(--iv-text-soft);
  font-size: 14px;
}

.iv-header a:hover {
  color: var(--iv-heading);
}

.iv-section {
  padding: 56px 0;
}

.iv-section--tight {
  padding: 32px 0;
}

h1 {
  font-size: 32px;
  margin-bottom: 16px;
  color: var(--iv-heading);
}

h2 {
  font-size: 24px;
  margin-bottom: 12px;
  color: var(--iv-heading);
}

p {
  margin-bottom: 14px;
}

.iv-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 18px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: var(--iv-primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.iv-btn:hover {
  background: var(--iv-primary-2);
}

.iv-card {
  background: var(--iv-surface);
  border: 1px solid var(--iv-border);
  border-radius: 12px;
  padding: 20px;
}

.iv-footer {
  border-top: 1px solid var(--iv-border);
  padding: 32px 0;
  font-size: 14px;
  color: var(--iv-text-soft);
}

/* IV LOGO */
.iv-logo {
  height: 28px;
  width: auto;
  object-fit: contain;
}

.iv-header__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  color: var(--iv-heading);
  text-decoration: none;
}

.iv-header__brand img {
  height: 28px;
  width: auto;
}

/* LOGO VARIANTS (fallback-ready) */
.iv-logo--main {
  content: url("/assets/img/iv_logo_256.svg");
}

.iv-logo--alt {
  content: url("/assets/img/iv_logo_256.svg");
}

.iv-logo--dark {
  content: url("/assets/img/iv_logo_256.svg");
}


/* IV LOGO */
.iv-logo {
  height: 28px;
  width: auto;
  object-fit: contain;
}

.iv-header__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  color: var(--iv-heading);
  text-decoration: none;
}

.iv-header__brand img {
  height: 28px;
  width: auto;
}

/* LOGO VARIANTS (fallback-ready) */
.iv-logo--main {
  content: url("/assets/img/iv_logo_256.svg");
}

.iv-logo--alt {
  content: url("/assets/img/iv_logo_256.svg");
}

.iv-logo--dark {
  content: url("/assets/img/iv_logo_256.svg");
}


/* IV LOGO */
.iv-logo {
  height: 28px;
  width: auto;
  object-fit: contain;
}

.iv-header__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  color: var(--iv-heading);
  text-decoration: none;
}

.iv-header__brand img {
  height: 28px;
  width: auto;
}

/* LOGO VARIANTS (fallback-ready) */
.iv-logo--main {
  content: url("/assets/img/iv_logo_256.svg");
}

.iv-logo--alt {
  content: url("/assets/img/iv_logo_256.svg");
}

.iv-logo--dark {
  content: url("/assets/img/iv_logo_256.svg");
}


/* MOBILE FIRST BASE */
.iv-container {
  width: 100%;
  padding: 0 16px;
}

.iv-header__inner {
  height: 56px;
}

.iv-section {
  padding: 32px 0;
}

h1 {
  font-size: 24px;
}

h2 {
  font-size: 20px;
}

.iv-btn {
  width: 100%;
}

/* TABLET */
@media (min-width: 640px) {
  .iv-container {
    max-width: 640px;
  }

  h1 {
    font-size: 28px;
  }

  .iv-btn {
    width: auto;
  }
}

/* DESKTOP */
@media (min-width: 1024px) {
  .iv-container {
    max-width: 1100px;
    padding: 0 20px;
  }

  .iv-section {
    padding: 56px 0;
  }

  h1 {
    font-size: 32px;
  }

  h2 {
    font-size: 24px;
  }
}


/* ===== VISUAL MAX – GLOBAL OVERRIDES ===== */

:root{
  --iv-max-width: 1100px;
  --iv-text-color: #111;
  --iv-muted: #555;
  --iv-border: #eaeaea;
  --iv-accent: #0a0a0a;
}

/* Container */
.iv-container{
  max-width: var(--iv-max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Headings */
h1{
  font-size: 40px;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--iv-text-color);
}

h2{
  font-size: 26px;
  line-height: 1.35;
  margin-top: 48px;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

h3{
  font-size: 20px;
  margin-top: 28px;
  margin-bottom: 8px;
}

/* Paragraphs */
p{
  font-size: 17px;
  line-height: 1.75;
  color: var(--iv-text-color);
  margin-bottom: 16px;
}

/* Sections */
.iv-section{
  margin: 56px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--iv-border);
}

.iv-section:last-child{
  border-bottom: none;
}

/* Lists */
ul{
  padding-left: 20px;
  margin: 16px 0;
}

li{
  margin-bottom: 8px;
  line-height: 1.6;
}

/* Header */
.iv-header{
  border-bottom: 1px solid var(--iv-border);
  background: #fff;
}

.iv-header__inner{
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}

.iv-nav a{
  margin-left: 28px;
  text-decoration: none;
  color: var(--iv-text-color);
  font-size: 15px;
}

.iv-nav a:hover{
  opacity: 0.6;
}

/* Breadcrumbs */
.iv-breadcrumbs{
  font-size: 13px;
  color: var(--iv-muted);
  margin-top: 20px;
}

/* Buttons */
.iv-button{
  display: inline-block;
  padding: 12px 20px;
  background: var(--iv-accent);
  color: #fff;
  text-decoration: none;
  font-size: 15px;
  border-radius: 6px;
  margin-top: 12px;
}

.iv-button:hover{
  opacity: 0.85;
}

/* Special blocks */
.iv-seo-layer{
  background: #fafafa;
  padding: 16px;
  border-radius: 6px;
}

.iv-authority{
  background: #f5f5f5;
  padding: 20px;
  border-left: 4px solid #000;
  border-radius: 4px;
}

.iv-structure{
  background: #f9f9f9;
  padding: 14px;
  border-radius: 4px;
  font-family: monospace;
}

/* Footer */
.iv-footer{
  margin-top: 80px;
  padding: 40px 0;
  border-top: 1px solid var(--iv-border);
  font-size: 14px;
  color: var(--iv-muted);
  text-align: center;
}