/*
Theme Name: M3 Flow
Theme URI: https://example.com/m3-flow
Author: Your Name
Description: Material Design 3 (Material You) WordPress Theme. WooCommerce compatible.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.4
Text Domain: m3-flow
*/

:root {
  /* M3 System Colors (Light Defaults) */
  --md-sys-color-primary-fallback: #0061a4;
  --md-sys-color-primary: var(--md-sys-color-primary-custom-light, var(--md-sys-color-primary-fallback));
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-primary-container: #d1e4ff;
  --md-sys-color-on-primary-container: #001d36;

  /* Surface / Backgrounds */
  --md-sys-color-surface: #f9f9f9;
  --md-sys-color-on-surface: #1a1c1e;
  --md-sys-color-surface-container-low: #f3f4f6;
  --md-sys-color-surface-container: #e1e2e4;
  --md-sys-color-outline: #73777f;

  /* Typography Scale */
  --md-sys-typescale-display-large-font: system-ui, -apple-system, sans-serif;
  --md-sys-typescale-display-large-size: 3.5625rem;
  --md-sys-typescale-title-large-size: 1.375rem;
  --md-sys-typescale-body-large-size: 1rem;
  --md-sys-typescale-body-large-line-height: 1.5;

  /* Elevation (Shadows) */
  --md-sys-elevation-1: 0px 1px 2px 0px rgba(0,0,0,0.3), 0px 1px 3px 1px rgba(0,0,0,0.15);
  --md-sys-elevation-2: 0px 1px 2px 0px rgba(0,0,0,0.3), 0px 2px 6px 2px rgba(0,0,0,0.15);

  /* Shapes */
  --md-sys-shape-corner-medium: 12px;
  --md-sys-shape-corner-full: 100px;
}

/* Explicit Dark Mode */
html[data-theme="dark"] {
  --md-sys-color-primary-fallback: #9ecaff;
  --md-sys-color-primary: var(--md-sys-color-primary-custom-dark, var(--md-sys-color-primary-fallback));
  --md-sys-color-on-primary: #003258;
  --md-sys-color-primary-container: #00497d;
  --md-sys-color-on-primary-container: #d1e4ff;
  
  --md-sys-color-surface: #111315;
  --md-sys-color-on-surface: #e2e2e6;
  --md-sys-color-surface-container-low: #1a1c1e;
  --md-sys-color-surface-container: #1f2023;
  --md-sys-color-outline: #8d9199;
}

/* Implicit Dark Mode Fallback */
@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) {
    --md-sys-color-primary-fallback: #9ecaff;
    --md-sys-color-primary: var(--md-sys-color-primary-custom-dark, var(--md-sys-color-primary-fallback));
    --md-sys-color-on-primary: #003258;
    --md-sys-color-primary-container: #00497d;
    --md-sys-color-on-primary-container: #d1e4ff;
    
    --md-sys-color-surface: #111315;
    --md-sys-color-on-surface: #e2e2e6;
    --md-sys-color-surface-container-low: #1a1c1e;
    --md-sys-color-surface-container: #1f2023;
    --md-sys-color-outline: #8d9199;
  }
}

/* ==========================================================================
   Resets & Base (Accessible & Fast)
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--md-sys-typescale-body-large-font);
  font-size: var(--md-sys-typescale-body-large-size);
  line-height: var(--md-sys-typescale-body-large-line-height);
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s, color 0.3s;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--md-sys-color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible { outline: 2px solid var(--md-sys-color-primary); outline-offset: 2px; }

/* ==========================================================================
   Layout Containers
   ========================================================================== */
.m3-container {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: 16px;
}
@media (min-width: 768px) {
  .m3-container { padding-inline: 24px; }
}

/* ==========================================================================
   Top App Bar (Header)
   ========================================================================== */
.m3-top-app-bar {
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  min-height: 64px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--md-sys-color-surface-container);
  position: sticky;
  top: 0;
  z-index: 40;
  transition: background-color 0.3s, border-color 0.3s;
}
.m3-top-app-bar .m3-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}
/* Site Logo Sizing and Animation */
.site-branding.m3-logo img.custom-logo {
  max-height: 50px; /* Optimal header logo size */
  width: auto;
  transition: transform 0.3s cubic-bezier(0.2, 0, 0, 1);
  display: block;
}
.site-branding.m3-logo a.custom-logo-link:hover img.custom-logo {
  transform: scale(1.04);
}

/* Primary Navigation Enhancements */
.m3-primary-nav {
  position: relative;
}
.m3-primary-nav ul {
  display: flex;
  gap: 8px; /* Refined spacing */
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
}
.m3-primary-nav li {
  position: relative;
}
.m3-primary-nav a {
  color: var(--md-sys-color-on-surface);
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
  padding: 10px 18px;
  border-radius: var(--md-sys-shape-corner-full);
  transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
  display: inline-flex;
  align-items: center;
}
/* Enhanced Hover States */
.m3-primary-nav a:hover, .m3-primary-nav a:focus {
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  text-decoration: none;
  transform: translateY(-1px);
}
/* Active Menu Items (WordPress classes) */
.m3-primary-nav li.current-menu-item > a,
.m3-primary-nav li.current_page_item > a {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  box-shadow: var(--md-sys-elevation-1);
}
.m3-primary-nav li.current-menu-item > a:hover,
.m3-primary-nav li.current_page_item > a:hover {
  transform: translateY(-1px);
  box-shadow: var(--md-sys-elevation-2);
}

/* Submenu / Dropdown Support */
.m3-primary-nav ul ul {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  flex-direction: column;
  background-color: var(--md-sys-color-surface);
  min-width: 220px;
  border-radius: var(--md-sys-shape-corner-medium);
  box-shadow: var(--md-sys-elevation-2);
  padding: 8px 0;
  gap: 4px;
  z-index: 100;
  border: 1px solid var(--md-sys-color-surface-container);
  margin-top: 8px;
}
.m3-primary-nav li:hover > ul {
  display: flex;
  animation: m3-fade-in-down 0.2s ease forwards;
}
.m3-primary-nav ul ul li {
  width: 100%;
}
.m3-primary-nav ul ul a {
  border-radius: 0;
  padding: 10px 24px;
  width: 100%;
  font-weight: 500;
}
.m3-primary-nav ul ul a:hover {
  background-color: var(--md-sys-color-surface-container-low);
  transform: none;
  color: var(--md-sys-color-primary);
}

@keyframes m3-fade-in-down {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* M3 Icon Button and theme toggles */
.m3-icon-button {
  background: none;
  border: none;
  color: var(--md-sys-color-on-surface);
  cursor: pointer;
  padding: 12px;
  border-radius: var(--md-sys-shape-corner-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s, color 0.2s;
}
.m3-icon-button:hover {
  background-color: var(--md-sys-color-surface-container);
}
html[data-theme="dark"] .m3-sun { display: block; }
html[data-theme="dark"] .m3-moon { display: none; }
html:not([data-theme="dark"]) .m3-sun { display: none; }
html:not([data-theme="dark"]) .m3-moon { display: block; }

/* ==========================================================================
   Components: Cards & Post Grids
   ========================================================================== */
.m3-post-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding-block: 32px;
}
@media (min-width: 600px) {
  .m3-post-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
}
@media (min-width: 900px) {
  .m3-post-grid { grid-template-columns: repeat(3, 1fr); }
}

.m3-card {
  background-color: var(--md-sys-color-surface-container-low);
  border-radius: var(--md-sys-shape-corner-medium);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.2s ease, transform 0.2s ease, background-color 0.3s;
  border: 1px solid var(--md-sys-color-surface-container);
}
.m3-card:hover {
  box-shadow: var(--md-sys-elevation-2);
  transform: translateY(-2px);
}
.m3-card__media img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}
.m3-card__content { padding: 16px; flex-grow: 1; }
.m3-card__title {
  margin-top: 0;
  font-size: var(--md-sys-typescale-title-large-size);
  margin-bottom: 8px;
}
.m3-card__title a { color: var(--md-sys-color-on-surface); }
.m3-card__title a:hover { color: var(--md-sys-color-primary); }

/* ==========================================================================
   WooCommerce M3 Integration
   ========================================================================== */
.woocommerce ul.products {
  display: grid !important;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)) !important;
  gap: 24px !important;
  margin: 32px 0 !important;
}
.woocommerce ul.products li.product {
  width: 100% !important;
  margin: 0 !important;
  background-color: var(--md-sys-color-surface-container-low);
  border-radius: var(--md-sys-shape-corner-medium);
  padding: 16px !important;
  text-align: center;
  transition: box-shadow 0.2s, background-color 0.3s;
  border: 1px solid var(--md-sys-color-surface-container);
}
.woocommerce ul.products li.product:hover {
  box-shadow: var(--md-sys-elevation-1);
}
/* M3 Filled Button for Add to Cart */
.woocommerce #respond input#submit.alt, 
.woocommerce a.button.alt, 
.woocommerce button.button.alt, 
.woocommerce input.button.alt,
.woocommerce a.button.add_to_cart_button {
  background-color: var(--md-sys-color-primary) !important;
  color: var(--md-sys-color-on-primary) !important;
  border-radius: var(--md-sys-shape-corner-full) !important;
  font-weight: 500 !important;
  padding: 10px 24px !important;
  transition: opacity 0.2s, box-shadow 0.2s !important;
  border: none !important;
}
.woocommerce a.button.add_to_cart_button:hover {
  opacity: 0.9 !important;
  box-shadow: var(--md-sys-elevation-1) !important;
}

/* ==========================================================================
   B2B Technical Portfolio Styles
   ========================================================================== */
.single-portfolio {
  padding-block: 48px;
}
.portfolio-entry-header {
  margin-bottom: 48px;
  border-bottom: 2px solid var(--md-sys-color-primary-container);
  padding-bottom: 32px;
}
.portfolio-header__subtitle {
  font-size: 1.5rem;
  line-height: 1.4;
  color: var(--md-sys-color-primary);
  font-weight: 500;
  margin-block: 16px;
  max-width: 800px;
}
.portfolio-header__meta {
  display: flex;
  gap: 24px;
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--md-sys-color-outline);
  margin-bottom: 24px;
}
.portfolio-header__meta-item {
  display: flex;
  align-items: center;
  gap: 8px;
}
.portfolio-header__meta-item svg {
  color: var(--md-sys-color-primary);
}
.portfolio-header__philosophy-box {
  background-color: var(--md-sys-color-surface-container);
  border-left: 4px solid var(--md-sys-color-primary);
  padding: 20px;
  border-radius: 0 var(--md-sys-shape-corner-medium) var(--md-sys-shape-corner-medium) 0;
  margin-top: 24px;
}
.philosophy-box__title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--md-sys-color-primary);
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}
.philosophy-box__content {
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  margin: 0;
}

/* Custom Typography Directives for Portfolio Content */
.portfolio-content h2 {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--md-sys-color-on-surface);
  margin-top: 40px;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  position: relative;
}
.portfolio-content h3 {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--md-sys-color-primary);
  margin-top: 28px;
  margin-bottom: 12px;
}
.portfolio-content p {
  margin-bottom: 24px;
  line-height: 1.6;
}
.portfolio-content hr {
  border: 0;
  height: 1px;
  background-color: var(--md-sys-color-outline);
  opacity: 0.3;
  margin-block: 48px;
}
.portfolio-content blockquote {
  border-left: 6px solid var(--md-sys-color-primary);
  background-color: var(--md-sys-color-surface-container-low);
  padding: 24px 32px;
  margin: 32px 0;
  border-radius: 0 var(--md-sys-shape-corner-medium) var(--md-sys-shape-corner-medium) 0;
}
.portfolio-content blockquote p {
  margin: 0;
  font-style: italic;
  font-size: 1.125rem;
  color: var(--md-sys-color-on-surface);
  line-height: 1.5;
}
.portfolio-content blockquote::before {
  content: "BUSINESS IMPACT / CORE PRINCIPLE";
  display: block;
  font-size: 0.6875rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--md-sys-color-primary);
  margin-bottom: 8px;
}

/* Operational Pipelines / Lists */
.portfolio-content ul {
  list-style: none;
  padding-left: 0;
  margin-block: 24px;
}
.portfolio-content ul li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 16px;
  line-height: 1.6;
}
.portfolio-content ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background-color: var(--md-sys-color-primary);
  border-radius: 50%;
}

/* Operational Pipelines Specific Style */
.m3-pipeline-list {
  border-left: 2px dashed var(--md-sys-color-outline);
  padding-left: 24px;
  margin-left: 12px;
  margin-block: 32px;
}
.m3-pipeline-list li {
  list-style: none;
  margin-bottom: 24px !important;
  position: relative;
  padding-left: 12px;
}
.m3-pipeline-list li::before {
  content: "➔" !important;
  position: absolute;
  left: -33px;
  top: 2px;
  width: 18px;
  height: 18px;
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  border-radius: 50%;
  font-size: 0.625rem;
  display: flex !important;
  align-items: center;
  justify-content: center;
}

/* Technical Callout Boxes */
.m3-callout-box {
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  padding: 24px;
  border-radius: var(--md-sys-shape-corner-medium);
  margin-block: 32px;
}
.m3-callout-box__title {
  font-weight: 800;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.m3-callout-box__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.5;
}

/* Dynamic Visual 4-Phase Step Pipeline */
.m3-step-pipeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-block: 40px;
}
@media (min-width: 768px) {
  .m3-step-pipeline {
    grid-template-columns: repeat(4, 1fr);
    position: relative;
  }
}

.m3-pipeline-step {
  background-color: var(--md-sys-color-surface-container-low);
  padding: 24px;
  border-radius: var(--md-sys-shape-corner-medium);
  border: 1px solid var(--md-sys-color-surface-container);
  position: relative;
  z-index: 2;
  text-align: center;
}
.m3-pipeline-step__num {
  width: 32px;
  height: 32px;
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
  margin-bottom: 16px;
}
.m3-pipeline-step__title {
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 8px 0;
  color: var(--md-sys-color-on-surface);
}
.m3-pipeline-step__desc {
  font-size: 0.8125rem;
  line-height: 1.4;
  margin: 0;
  color: var(--md-sys-color-outline);
}

/* Architectural Flow Visual Box Diagram Grid */
.m3-flow-diagram {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  margin-block: 40px;
}
@media (min-width: 768px) {
  .m3-flow-diagram {
    flex-direction: row;
    gap: 0;
    justify-content: space-between;
  }
}
.m3-flow-node {
  background-color: var(--md-sys-color-surface-container);
  border: 2px solid var(--md-sys-color-outline);
  padding: 16px 24px;
  border-radius: var(--md-sys-shape-corner-medium);
  font-family: var(--md-sys-typescale-body-large-font);
  font-weight: 600;
  text-align: center;
  min-width: 180px;
}
.m3-flow-connector {
  font-weight: bold;
  color: var(--md-sys-color-primary);
  transform: rotate(90deg);
}
@media (min-width: 768px) {
  .m3-flow-connector {
    transform: rotate(0deg);
    padding-inline: 12px;
  }
}