/* ================================
   Base + Variables
   ================================ */

:root {
  /* Colors */
  --color-bg: #f7f3ee;           /* off-white / warm light gray */
  --color-bg-alt: #efe7dd;       /* slightly deeper variant */
  --color-surface: #ffffff;
  --color-border-subtle: #ddd0c5;

  --color-text-main: #1f2529;    /* charcoal */
  --color-text-muted: #5f6469;
  --color-text-soft: #7a8085;

  --color-accent: #3d7f7a;       /* muted teal */
  --color-accent-soft: #c3dedb;

  --color-focus: #c97c3e;        /* warm focus ring */

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;

  /* Sizing / Spacing */
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1.25rem;

  --space-2xs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  --max-width: 68rem;            /* ~1088px */

  /* Shadows */
  --shadow-soft: 0 10px 24px rgba(0, 0, 0, 0.05);
}

/* ================================
   Global Resets
   ================================ */

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-main);
  background-color: var(--color-bg);
}

h1, h2, h3, h4, h5, h6, p {
  margin: 0;
}

img {
  max-width: 100%;
  display: block;
}

/* ================================
   Utility
   ================================ */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.section {
  padding-block: var(--space-2xl);
}

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

.section-header {
  max-width: 40rem;
  margin-bottom: var(--space-xl);
}

.section-header h2 {
  font-size: 1.6rem;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-sm);
}

.section-intro {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* Visually hidden labels */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-accent);
  color: #fff;
  z-index: 100;
  border-radius: var(--radius-sm);
  text-decoration: none;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.4rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
}

.btn-primary {
  background-color: var(--color-accent);
  color: #ffffff;
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent-soft);
}

/* Inputs */
.input {
  padding: 0.6rem 0.8rem;
  border-radius: 999px;
  border: 1px solid var(--color-border-subtle);
  background-color: var(--color-surface);
  font-size: 0.95rem;
}

/* Links */
a {
  color: var(--color-accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* Focus outlines */
:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

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

.site-header {
  background-color: var(--color-bg);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(6px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-sm);
}

.logo-link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.12em;
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--color-text-main);
}
.logo-link:hover {
  text-decoration: none;
}
.logo-mark {
  font-size: 0.65em;
  color: var(--color-text-soft);
}

/* Mobile nav toggle */
.nav-toggle {
  position: absolute;
  opacity: 0;
}

.nav-toggle-label {
  display: inline-flex;
  padding: var(--space-xs);
  cursor: pointer;
}
.nav-toggle-icon {
  width: 1.25rem;
  height: 1.25rem;
  position: relative;
}
.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-main);
  transition: 0.2s;
}
.nav-toggle-icon::before {
  top: 0.4rem;
}
.nav-toggle-icon::after {
  bottom: 0.4rem;
}

.site-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  padding: var(--space-md);
  background-color: var(--color-bg);
}

.nav-toggle:checked ~ .site-nav {
  display: block;
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  list-style: none;
  padding: 0;
}

.nav-link-active {
  color: var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
}

@media (min-width: 768px) {
  .nav-toggle-label { display: none; }
  .site-nav { position: static; display: block !important; padding: 0; }
  .nav-list {
    flex-direction: row;
    gap: var(--space-md);
  }
}

/* ================================
   Hero
   ================================ */

.section-hero {
  padding-block: var(--space-2xl);
}

.hero-inner {
  display: grid;
  gap: var(--space-xl);
}

.hero-text h1 {
  font-size: 2rem;
  margin-bottom: var(--space-md);
}

.hero-subtitle {
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.hero-actions {
  display: flex;
  gap: var(--space-sm);
}

/* Hero visual */
.hero-visual {
  position: relative;
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  background: linear-gradient(
    135deg,
    rgba(61, 127, 122, 0.16),
    rgba(201, 124, 62, 0.08)
  );
  min-height: 10rem;
  box-shadow: var(--shadow-soft);
}
.hero-layer {
  position: absolute;
  background-color: rgba(255,255,255,0.85);
  border: 1px solid rgba(255,255,255,0.6);
  border-radius: 1rem;
}
.hero-layer-1 { inset: 15% 25% 40% 5%; }
.hero-layer-2 { inset: 30% 5% 20% 30%; }
.hero-layer-3 { inset: 55% 15% 5% 45%; }

@media (min-width: 768px) {
  .hero-inner {
    grid-template-columns: 1.4fr 1fr;
    align-items: center;
  }
  .hero-text h1 {
    font-size: 2.6rem;
  }
}

/* ================================
   Cards
   ================================ */

.card {
  background: var(--color-surface);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
}
.card-grid {
  display: grid;
  gap: var(--space-lg);
}
.card-grid-3 {
  grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .card-grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.icon-circle {
  display: inline-block;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--color-accent-soft);
  border: 1px solid rgba(0,0,0,0.05);
}

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

.site-footer {
  background-color: #22282c;
  color: #ffffff;
  padding-block: var(--space-xl);
  margin-top: var(--space-xl);
}
.footer-inner {
  display: grid;
  gap: var(--space-lg);
}
.footer-heading {
  text-transform: uppercase;
  font-size: 0.85rem;
  margin-bottom: var(--space-xs);
}
.footer-nav {
  list-style: none;
  padding: 0;
}
.footer-nav li + li {
  margin-top: var(--space-xs);
}
.footer-small {
  color: #c9ced2;
  font-size: 0.8rem;
}
/* ================================
   Brand lockup: Professor + wordmark
   ================================ */

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-text-main);
  text-decoration: none;
}

.brand:hover { text-decoration: none; }

.brand-avatar {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid rgba(0,0,0,0.06);
  background: #fff;
  box-shadow: 0 10px 22px rgba(0,0,0,0.08);
}

.brand-wordmark {
  font-weight: 800;
  letter-spacing: 0.01em;
  font-size: 1.12rem;
  line-height: 1;
}

.brand-nerd {
  font-family: var(--font-mono);
  color: var(--color-accent);
  margin-left: 0.06em;
}

.brand-tm {
  font-size: 0.62em;
  vertical-align: super;
  margin-left: 0.12em;
  color: var(--color-text-muted);
}

/* =======================================
   HERO BANNER MODE
   ======================================= */

.hero-banner img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 28px rgba(0,0,0,0.12);
}

/* optional: tighter hero spacing */
.hero-inner {
  grid-template-columns: 1fr 1.2fr;
}

/* mobile: banner goes under text */
@media (max-width: 900px) {
  .hero-banner img {
    max-width: 100%;
    margin: 0 auto;
  }
}
/* ================================
   HERO MASTHEAD (banner first)
   ================================ */

.section-hero {
  padding-top: var(--space-lg); /* tuck closer to header */
}

.hero-masthead {
  display: grid;
  gap: var(--space-lg);
}

/* Banner card */
.hero-banner-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--color-border-subtle);
  box-shadow: var(--shadow-soft);
}

/* Make the banner fill a proper “masthead” height */
.hero-banner-card img {
  width: 100%;
  height: clamp(220px, 28vw, 380px);
  object-fit: cover;
  object-position: left center; /* keep professor on the left */
  display: block;
}

/* Lower hero area: copy + quick panel */
.hero-lower {
  display: grid;
  gap: var(--space-xl);
  align-items: start;
}

.hero-copy {
  max-width: 46rem;
}

.hero-copy h1 {
  font-size: clamp(2rem, 3.2vw, 3rem);
  line-height: 1.1;
  margin-bottom: var(--space-sm);
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.hero-reassurance {
  color: var(--color-text-muted);
  margin-top: var(--space-md);
}

/* Quick-start panel */
.hero-quick {
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.hero-quick-title {
  font-size: 1rem;
  margin-bottom: var(--space-sm);
  letter-spacing: 0.02em;
}

.hero-quick-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-sm);
}

.hero-quick-list a {
  color: var(--color-text-main);
  text-decoration: none;
}

.hero-quick-list a:hover {
  text-decoration: underline;
}

/* Desktop: put the quick-start panel to the right */
@media (min-width: 980px) {
  .hero-lower {
    grid-template-columns: 1.35fr 0.65fr;
  }
}

/* Buttons wrap nicely */
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}
/* Homepage: under-banner hero cleanup */
.hero-heading {
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 1.1;
  margin: var(--space-lg) 0 var(--space-md);
}

.hero-card-grid .card {
  height: 100%;
}

.card-cta {
  display: inline-block;
  margin-top: var(--space-sm);
  font-weight: 700;
  color: var(--color-accent);
}

.card-clickable:hover { text-decoration: none; }
/* ================================
   2-COLUMN CARD GRID FOR BLOG PREVIEW
   ================================ */

.card-grid-2 {
  display: grid;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .card-grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ================================
   FOOTER NAV HORIZONTAL LAYOUT
   ================================ */

.footer-nav-horizontal {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
  padding: 0;
  margin: 0;
  flex-wrap: wrap;
}

.footer-nav-horizontal li a {
  color: #f3f3f3;
  font-size: 0.95rem;
  text-decoration: none;
}

.footer-nav-horizontal li a:hover {
  text-decoration: underline;
}

/* Layout control */
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
/* ================================
   CMS: toolbars + empty state
   ================================ */

.cms-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  align-items: center;
  margin-bottom: var(--space-lg);
}

.cms-search {
  width: 100%;
  max-width: 520px;
}

.cms-count {
  margin: 0;
  color: var(--color-text-soft);
  font-size: 0.9rem;
  font-family: var(--font-mono);
}

.empty-state {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  background: rgba(255,255,255,0.75);
  color: var(--color-text-muted);
}

/* 2-column card grid */
.card-grid-2 { grid-template-columns: 1fr; }
@media (min-width: 768px) {
  .card-grid-2 { grid-template-columns: repeat(2, 1fr); }
}

/* Blog cards */
.card-article .card-title { margin-top: var(--space-xs); }
.card-title-link { color: var(--color-text-main); text-decoration: none; }
.card-title-link:hover { text-decoration: underline; }

.card-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: #113b38;
  background: rgba(61,127,122,0.16);
  border: 1px solid rgba(61,127,122,0.22);
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
}

.card-meta {
  color: var(--color-text-soft);
  font-size: 0.9rem;
  margin-top: var(--space-xs);
}

/* Product cards */
.product-card .product-meta {
  margin-top: var(--space-sm);
  font-weight: 700;
  color: var(--color-text-main);
}

.card-toprow {
  display: flex;
  justify-content: space-between;
  gap: var(--space-sm);
  align-items: baseline;
}

.pill {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  border: 1px solid rgba(0,0,0,0.08);
  background: rgba(255,255,255,0.9);
  color: var(--color-text-muted);
}
}