/*
Theme Name:        Kornerstone Consulting
Theme URI:         https://kornerstone.consulting
Author:            Kornerstone Consulting
Author URI:        https://kornerstone.consulting
Description:       A professional consulting theme built for Kornerstone Consulting — fractional COO, CHRO, and CFO services. Designed for use with Elementor page builder.
Version:           1.0.0
Requires at least: 6.0
Tested up to:      6.5
Requires PHP:      8.0
License:           GNU General Public License v2 or later
License URI:       https://www.gnu.org/licenses/gpl-2.0.html
Text Domain:       kornerstone
Tags:              consulting, elementor, business, professional, one-column, full-width-template
*/

/* ============================================================
   CSS Custom Properties — Brand Tokens
   ============================================================ */
:root {
  /* Brand Palette (from logo) */
  --kc-dark:         #232427;
  --kc-dark-2:       #2e2e31;
  --kc-dark-3:       #3d3d3f;
  --kc-gray:         #909192;
  --kc-light:        #fdfdfd;
  --kc-accent:       #1A3C6E;
  --kc-surface:      #f7f7f7;
  --kc-white:        #ffffff;
  --kc-footer-deep:  #1a1a1c;
  --kc-footer-bar:   #111113;
  --kc-border:       #e4e4e4;
  --kc-border-dark:  #3a3a3d;

  /* Typography */
  --font-heading:    'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body:       'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Scale */
  --radius-sm:       4px;
  --radius-md:       6px;
  --radius-lg:       10px;
  --shadow-card:     0 2px 16px rgba(0,0,0,0.08);
  --shadow-card-hover: 0 8px 32px rgba(0,0,0,0.14);
  --transition-base: 0.22s ease;
  --max-width:       1200px;
  --container-pad:   clamp(20px, 5vw, 80px);
}

/* ============================================================
   Global Reset & Base
   ============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.7;
  color: var(--kc-dark-3);
  background-color: var(--kc-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ============================================================
   Typography
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--kc-dark);
  margin-bottom: 0.75em;
}

h1 { font-size: clamp(2rem, 5vw, 3.75rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.75rem); }
h3 { font-size: clamp(1.375rem, 2.5vw, 1.75rem); }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.0625rem; }
h6 { font-size: 0.875rem; letter-spacing: 0.2em; text-transform: uppercase; }

p {
  margin-bottom: 1.25em;
  color: var(--kc-dark-3);
}

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

a {
  color: var(--kc-accent);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover { color: var(--kc-dark); }

ul, ol {
  padding-left: 1.5em;
  margin-bottom: 1.25em;
}

li { margin-bottom: 0.4em; }

strong, b { font-weight: 700; }
em, i { font-style: italic; }

blockquote {
  border-left: 4px solid var(--kc-dark);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  font-style: italic;
  color: var(--kc-gray);
  background: var(--kc-surface);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

code {
  font-family: 'Courier New', Courier, monospace;
  background: var(--kc-surface);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
  font-size: 0.875em;
}

hr {
  border: none;
  border-top: 1px solid var(--kc-border);
  margin: 2rem 0;
}

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

/* ============================================================
   Container & Layout Utilities
   ============================================================ */
.container {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

.container--narrow { max-width: 760px; }
.container--wide   { max-width: 1440px; }

.text-center { text-align: center; }
.text-left   { text-align: left; }
.text-right  { text-align: right; }

/* ============================================================
   Button System
   ============================================================ */
.btn,
button.btn,
input[type="submit"].btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9375rem;
  letter-spacing: 0.01em;
  line-height: 1;
  padding: 1rem 2.25rem;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition-base), color var(--transition-base),
              border-color var(--transition-base), transform var(--transition-base),
              box-shadow var(--transition-base);
  white-space: nowrap;
}

.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn:active { transform: translateY(0); }

/* Primary — white bg */
.btn-primary {
  background: var(--kc-light);
  color: var(--kc-dark);
  border-color: var(--kc-light);
}
.btn-primary:hover {
  background: var(--kc-surface);
  color: var(--kc-dark);
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

/* Dark */
.btn-dark {
  background: var(--kc-dark);
  color: var(--kc-light);
  border-color: var(--kc-dark);
}
.btn-dark:hover {
  background: var(--kc-dark-2);
  color: var(--kc-light);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

/* Outline */
.btn-outline {
  background: transparent;
  color: var(--kc-light);
  border-color: rgba(253,253,253,0.4);
}
.btn-outline:hover {
  background: rgba(253,253,253,0.1);
  color: var(--kc-light);
  border-color: var(--kc-light);
}

/* Accent */
.btn-accent {
  background: var(--kc-accent);
  color: var(--kc-light);
  border-color: var(--kc-accent);
}
.btn-accent:hover {
  background: #15336b;
  color: var(--kc-light);
  box-shadow: 0 4px 20px rgba(26,60,110,0.4);
}

.btn-sm { padding: 0.7rem 1.5rem; font-size: 0.875rem; }
.btn-lg { padding: 1.125rem 2.75rem; font-size: 1rem; }
.btn-xl { padding: 1.375rem 3.5rem; font-size: 1.0625rem; }

/* ============================================================
   Form Elements
   ============================================================ */
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
input[type="number"],
input[type="search"],
input[type="password"],
select,
textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--kc-light);
  background: var(--kc-dark-3);
  border: 1px solid var(--kc-border-dark);
  border-radius: var(--radius-sm);
  padding: 0.875rem 1.125rem;
  line-height: 1.5;
  outline: none;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
  appearance: none;
}

input::placeholder,
textarea::placeholder { color: var(--kc-gray); opacity: 0.7; }

input:focus,
textarea:focus,
select:focus {
  border-color: var(--kc-light);
  box-shadow: 0 0 0 3px rgba(253,253,253,0.12);
}

label {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--kc-gray);
  margin-bottom: 0.5rem;
}

.form-group { margin-bottom: 1.25rem; }

/* ============================================================
   Card Component
   ============================================================ */
.card {
  background: var(--kc-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 2.5rem 2rem;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.card--dark {
  background: var(--kc-dark);
  color: var(--kc-light);
}

.card--dark h2,
.card--dark h3,
.card--dark h4 { color: var(--kc-light); }

.card--dark p { color: var(--kc-gray); }

/* ============================================================
   Section Utilities
   ============================================================ */
.section { padding: 6rem 0; }
.section--sm { padding: 3.75rem 0; }
.section--lg { padding: 8rem 0; }

.section-eyebrow {
  font-family: var(--font-heading);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--kc-gray);
  display: block;
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--kc-dark);
  line-height: 1.15;
}

.section-title--light { color: var(--kc-light); }

/* ============================================================
   Site Header (base — Elementor Theme Builder overrides visually)
   ============================================================ */
#masthead {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--kc-dark);
  width: 100%;
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.125rem var(--container-pad);
  max-width: var(--max-width);
  margin: 0 auto;
}

.site-branding a {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--kc-light);
  text-decoration: none;
}

.site-branding img {
  max-height: 48px;
  width: auto;
}

/* Primary Navigation */
.main-navigation ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0;
  padding: 0;
  margin: 0;
}

.main-navigation ul li { position: relative; }

.main-navigation ul li a {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--kc-gray);
  text-decoration: none;
  padding: 0.5rem 1.125rem;
  letter-spacing: 0.02em;
  transition: color var(--transition-base);
}

.main-navigation ul li a:hover,
.main-navigation ul li.current-menu-item > a { color: var(--kc-light); }

/* Dropdown */
.main-navigation ul ul {
  display: none;
  flex-direction: column;
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  background: var(--kc-dark-2);
  border: 1px solid var(--kc-border-dark);
  border-radius: var(--radius-md);
  min-width: 220px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
  z-index: 1001;
  padding: 0.5rem 0;
  gap: 0;
}

.main-navigation ul li:hover > ul,
.main-navigation ul li:focus-within > ul { display: flex; }

.main-navigation ul ul li a {
  padding: 0.625rem 1.25rem;
  font-size: 0.8125rem;
  color: var(--kc-gray);
  white-space: nowrap;
}

.main-navigation ul ul li a:hover { color: var(--kc-light); background: rgba(255,255,255,0.05); }

/* Mobile toggle */
.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--kc-border-dark);
  color: var(--kc-light);
  font-size: 1.125rem;
  cursor: pointer;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
}

/* Header CTA */
.header-cta {
  margin-left: 1.5rem;
}

/* ============================================================
   Page / Content Area
   ============================================================ */
#primary { min-height: 60vh; }

.entry-content {
  max-width: 780px;
  margin: 0 auto;
  padding: 4rem var(--container-pad);
}

.entry-content h2 { margin-top: 2em; }
.entry-content h3 { margin-top: 1.5em; }

/* ============================================================
   Blog / Archive
   ============================================================ */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
  padding: 0 var(--container-pad);
  max-width: var(--max-width);
  margin: 0 auto;
}

.post-card {
  background: var(--kc-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.post-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

.post-card__thumb img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.post-card__body { padding: 1.75rem; }

.post-card__category {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--kc-accent);
  margin-bottom: 0.625rem;
}

.post-card__title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--kc-dark);
  margin-bottom: 0.75rem;
  line-height: 1.35;
}

.post-card__excerpt {
  font-size: 0.9375rem;
  color: var(--kc-gray);
  line-height: 1.65;
  margin-bottom: 1.25rem;
}

.post-card__meta {
  font-size: 0.8125rem;
  color: var(--kc-gray);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ============================================================
   Site Footer (fallback — Elementor Theme Builder replaces)
   ============================================================ */
#colophon {
  background: var(--kc-footer-deep);
  color: var(--kc-gray);
  padding: 3.75rem 0 0;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  padding: 0 var(--container-pad);
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-brand__name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--kc-light);
  margin-bottom: 0.875rem;
}

.footer-col__title {
  font-family: var(--font-heading);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--kc-light);
  margin-bottom: 1.25rem;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col ul li { margin-bottom: 0.75rem; }

.footer-col ul li a {
  font-size: 0.875rem;
  color: var(--kc-gray);
  text-decoration: none;
  transition: color var(--transition-base);
}

.footer-col ul li a:hover { color: var(--kc-light); }

.footer-bar {
  background: var(--kc-footer-bar);
  margin-top: 3rem;
  padding: 1.125rem var(--container-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 100%;
}

.footer-bar__copy,
.footer-bar__links {
  font-size: 0.8125rem;
  color: var(--kc-dark-3);
}

.footer-bar__links a {
  color: var(--kc-dark-3);
  text-decoration: none;
  margin-left: 1.25rem;
}

.footer-bar__links a:hover { color: var(--kc-gray); }

/* ============================================================
   Page Hero (fallback for non-Elementor pages)
   ============================================================ */
.page-hero {
  background: var(--kc-dark);
  padding: 6rem var(--container-pad) 5rem;
  text-align: center;
}

.page-hero__eyebrow {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--kc-gray);
  margin-bottom: 1rem;
}

.page-hero__title {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 700;
  color: var(--kc-light);
  line-height: 1.15;
  margin-bottom: 1.25rem;
}

.page-hero__subtitle {
  font-size: 1.125rem;
  color: var(--kc-gray);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.75;
}

/* ============================================================
   404 Page
   ============================================================ */
.error-404 {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  text-align: center;
  padding: 4rem var(--container-pad);
  background: var(--kc-dark);
}

.error-404__code {
  font-family: var(--font-heading);
  font-size: clamp(6rem, 15vw, 12rem);
  font-weight: 800;
  color: var(--kc-dark-2);
  line-height: 1;
  margin-bottom: 0;
}

.error-404__title {
  font-size: 1.75rem;
  color: var(--kc-light);
  margin-bottom: 1rem;
}

.error-404__message {
  color: var(--kc-gray);
  font-size: 1.0625rem;
  max-width: 480px;
  margin: 0 auto 2rem;
}

/* ============================================================
   Utility Classes
   ============================================================ */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.text-gray   { color: var(--kc-gray); }
.text-light  { color: var(--kc-light); }
.text-dark   { color: var(--kc-dark); }
.text-accent { color: var(--kc-accent); }
.bg-dark     { background-color: var(--kc-dark); }
.bg-surface  { background-color: var(--kc-surface); }
.bg-white    { background-color: var(--kc-white); }

/* ============================================================
   Print Styles
   ============================================================ */
@media print {
  #masthead, #colophon, .header-cta, .btn { display: none; }
  body { font-size: 12pt; color: #000; }
  a { color: #000; text-decoration: underline; }
  h1, h2, h3 { page-break-after: avoid; }
  p, li { page-break-inside: avoid; }
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 768px) {
  .site-header-inner { padding: 0.875rem 1.25rem; }
  
  .menu-toggle { display: inline-flex; }

  .main-navigation ul {
    display: none;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--kc-dark);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
  }

  .main-navigation.is-open ul { display: flex; }

  .main-navigation ul li a {
    font-size: 1.25rem;
    padding: 0.875rem 2rem;
  }

  .main-navigation ul ul {
    display: flex !important;
    position: static;
    background: transparent;
    border: none;
    box-shadow: none;
    padding-left: 1rem;
  }

  .header-cta { display: none; }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bar {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
}

@media (max-width: 480px) {
  h1 { font-size: 1.875rem; }
  h2 { font-size: 1.625rem; }
  h3 { font-size: 1.25rem; }

  .section { padding: 3.5rem 0; }
  .section--lg { padding: 4.5rem 0; }

  .btn { width: 100%; justify-content: center; }
}