/* ==========================================================================
   You The Winner Hub - Master Design System
   WCAG AA/AAA Compliant, Zero Dependencies, Light Default
   ========================================================================== */

:root {
  /* Color Scheme declaration */
  color-scheme: light dark;

  /* Palette - Warm, Accessible, Human */
  --color-bg: #fcfcfb;
  --color-bg-alt: #f4f5f1;
  --color-surface: #ffffff;
  --color-surface-hover: #f8faf8;
  --color-border: #e2e5dc;
  --color-border-light: #ecefe6;
  --color-header-bg: rgba(252, 252, 251, 0.95);

  /* Typography Colors */
  --color-text: #1a2228;
  --color-text-muted: #4e5b66;
  --color-text-light: #6e7c87;

  /* Primary Brand - Deep Forest / Pine */
  --color-primary: #1d463e;
  --color-primary-hover: #14322c;
  --color-primary-light: #e8f0ec;
  --color-primary-text: #ffffff;

  /* Secondary Accent - Warm Amber / Sand */
  --color-accent: #c48b48;
  --color-accent-hover: #a87232;
  --color-accent-light: #fbf5ee;

  /* Badges & Status */
  --badge-live-text: #1d5939;
  --badge-live-bg: #eaf5ee;
  --badge-live-border: #c3e2cd;

  --badge-preview-text: #8c5307;
  --badge-preview-bg: #fdf6ea;
  --badge-preview-border: #fae1b8;

  --badge-core-text: #1b3a57;
  --badge-core-bg: #edf4fa;
  --badge-core-border: #c6dcfa;

  /* Typography */
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Merriweather", Georgia, Cambria, serif;

  --text-xs: 0.8125rem;
  --text-sm: 0.9375rem;
  --text-base: 1.0625rem;
  --text-md: 1.1875rem;
  --text-lg: 1.375rem;
  --text-xl: 1.625rem;
  --text-2xl: 2.125rem;
  --text-3xl: 2.75rem;

  --leading-tight: 1.25;
  --leading-snug: 1.4;
  --leading-normal: 1.6;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4.5rem;

  /* Container & Radius */
  --container-max: 1200px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Elevation */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;

  --focus-ring: 3px solid var(--color-primary);
  --focus-offset: 3px;
}

/* Explicit User-Selected Dark Theme */
[data-theme="dark"] {
  color-scheme: dark;
  --color-bg: #101619;
  --color-bg-alt: #161f23;
  --color-surface: #1b262b;
  --color-surface-hover: #222e34;
  --color-border: #28373e;
  --color-border-light: #202c32;
  --color-header-bg: rgba(16, 22, 25, 0.95);

  --color-text: #f0f4f6;
  --color-text-muted: #a0b1bc;
  --color-text-light: #7a8d9a;

  --color-primary: #3ba18d;
  --color-primary-hover: #4dc0a9;
  --color-primary-light: #162f28;
  --color-primary-text: #ffffff;

  --color-accent: #d89f5c;
  --color-accent-hover: #ebb476;
  --color-accent-light: #2d2216;

  --badge-live-text: #6ee7b7;
  --badge-live-bg: rgba(16, 185, 129, 0.14);
  --badge-live-border: rgba(16, 185, 129, 0.35);

  --badge-preview-text: #fcd34d;
  --badge-preview-bg: rgba(245, 158, 11, 0.14);
  --badge-preview-border: rgba(245, 158, 11, 0.35);

  --badge-core-text: #93c5fd;
  --badge-core-bg: rgba(59, 130, 246, 0.14);
  --badge-core-border: rgba(59, 130, 246, 0.35);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.6);
}

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

html {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Accessibility Skip Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-md);
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  z-index: 10000;
  text-decoration: none;
  font-weight: 600;
}
.skip-link:focus {
  top: var(--space-md);
}

/* Focus styles */
:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-lg);
  padding-right: var(--space-lg);
}

/* Site Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-header-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: var(--space-md);
}

/* Brand Title */
.brand-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--color-text);
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text);
  line-height: 1.2;
}

.brand-subtitle {
  font-size: var(--text-xs);
  color: var(--color-accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Navigation Links */
.nav-links {
  display: flex;
  list-style: none;
  gap: var(--space-xl);
  align-items: center;
}

.nav-link {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
}

/* Header Action Controls */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Theme Toggle Button */
.theme-toggle {
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background-color: var(--color-bg-alt);
  color: var(--color-text);
  border-color: var(--color-text-light);
}

.theme-icon-sun {
  display: none;
}
.theme-icon-moon {
  display: block;
}

[data-theme="dark"] .theme-icon-sun {
  display: block !important;
}
[data-theme="dark"] .theme-icon-moon {
  display: none !important;
}

/* Language Dropdown Selector */
.lang-dropdown {
  position: relative;
  display: inline-block;
}

.lang-dropdown-btn {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  height: 38px;
  padding: 0 0.65rem 0 0.45rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  color: var(--color-text);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: all var(--transition-fast);
}

.lang-dropdown-btn:hover,
.lang-dropdown.open .lang-dropdown-btn {
  background-color: var(--color-bg-alt);
  border-color: var(--color-primary);
}

.lang-flag-current {
  display: inline-flex;
  align-items: center;
}

.lang-label-current {
  font-size: var(--text-xs);
  font-weight: 700;
}

.lang-dropdown-chevron {
  color: var(--color-text-light);
  transition: transform var(--transition-fast);
  margin-left: 2px;
}

.lang-dropdown.open .lang-dropdown-chevron {
  transform: rotate(180deg);
}

.lang-dropdown-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 0.35rem 0;
  min-width: 185px;
  list-style: none;
  z-index: 1000;
  display: none;
  animation: dropdownFadeIn 150ms ease;
}

.lang-dropdown.open .lang-dropdown-menu {
  display: block;
}

@keyframes dropdownFadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.lang-dropdown-option {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 0.9rem;
  cursor: pointer;
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text);
  transition: background-color var(--transition-fast);
}

.lang-dropdown-option:hover {
  background-color: var(--color-bg-alt);
  color: var(--color-primary);
}

.lang-dropdown-option.active {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 700;
}

.lang-opt-name {
  flex-grow: 1;
}

.lang-opt-code {
  font-size: 0.7rem;
  color: var(--color-text-light);
  text-transform: uppercase;
  font-weight: 700;
  background: var(--color-bg-alt);
  padding: 1px 5px;
  border-radius: 4px;
}

.flag-icon {
  display: block;
  border-radius: 50%;
  pointer-events: none;
}

/* Mobile Nav Toggle */
.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-text);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 0.65rem 1.25rem;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-full);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-primary-text);
}
.btn-primary:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-secondary:hover {
  background-color: var(--color-bg-alt);
  border-color: var(--color-text-muted);
}

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

.btn-sm {
  padding: 0.45rem 0.95rem;
  font-size: var(--text-xs);
}

/* Hero Section */
.hero-section {
  padding: var(--space-3xl) 0 var(--space-2xl);
  text-align: center;
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
  border-bottom: 1px solid var(--color-border);
}

.hero-eyebrow {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  background-color: var(--color-accent-light);
  border: 1px solid rgba(196, 139, 72, 0.25);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-md);
}

.hero-title {
  font-size: var(--text-3xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: var(--leading-tight);
  color: var(--color-text);
  max-width: 860px;
  margin: 0 auto var(--space-lg);
}

.hero-desc {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 720px;
  margin: 0 auto var(--space-xl);
  line-height: var(--leading-normal);
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  margin-bottom: var(--space-2xl);
}

/* Pill Stats Bar */
.stats-bar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-xl);
  flex-wrap: wrap;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border-light);
  max-width: 800px;
  margin: 0 auto;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-val {
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-primary);
}

.stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Ecosystem Grid */
.ecosystem-section {
  padding: var(--space-3xl) 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-2xl);
}

.section-eyebrow {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.section-title {
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}

.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
}

.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-xl);
}

.product-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  position: relative;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md);
}

.card-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--color-bg-alt);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.badge {
  font-size: var(--text-xs);
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-live {
  background-color: var(--badge-live-bg);
  color: var(--badge-live-text);
  border: 1px solid var(--badge-live-border);
}

.badge-preview {
  background-color: var(--badge-preview-bg);
  color: var(--badge-preview-text);
  border: 1px solid var(--badge-preview-border);
}

.badge-core {
  background-color: var(--badge-core-bg);
  color: var(--badge-core-text);
  border: 1px solid var(--badge-core-border);
}

.card-title {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.card-role {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-normal);
  margin-bottom: var(--space-lg);
  flex-grow: 1;
}

.card-features {
  list-style: none;
  margin-bottom: var(--space-xl);
}

.card-feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
  line-height: 1.4;
}

.card-feature-item svg {
  flex-shrink: 0;
  color: var(--color-primary);
  margin-top: 2px;
}

.card-footer {
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Highlighted state from tool selector */
.product-card.card-highlighted {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(196, 139, 72, 0.35);
  animation: pulseHighlight 1.5s ease-in-out infinite alternate;
}

@keyframes pulseHighlight {
  from { box-shadow: 0 0 0 2px rgba(196, 139, 72, 0.25); }
  to { box-shadow: 0 0 0 6px rgba(196, 139, 72, 0.45); }
}

/* Interactive Guided Selector */
.selector-section {
  padding: var(--space-3xl) 0;
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.selector-box {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  max-width: 840px;
  margin: 0 auto;
  box-shadow: var(--shadow-md);
}

.selector-prompt {
  font-size: var(--text-md);
  font-weight: 700;
  margin-bottom: var(--space-lg);
  text-align: center;
}

.selector-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.selector-btn {
  background-color: var(--color-bg-alt);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.selector-btn:hover {
  border-color: var(--color-primary);
  background-color: var(--color-surface);
}

.selector-btn.selected {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
}

.selector-btn-title {
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-text);
}

.selector-btn-sub {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.selector-result {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  display: none;
  animation: fadeIn 300ms ease;
}

.selector-result.visible {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Philosophy / Trust Section */
.trust-section {
  padding: var(--space-3xl) 0;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
}

.trust-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.trust-title {
  font-size: var(--text-md);
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--color-primary);
}

.trust-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-normal);
}

/* Site Footer */
.site-footer {
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: var(--space-3xl) 0 var(--space-xl);
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 340px;
  margin: var(--space-md) 0;
}

.footer-heading {
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-link {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-primary);
}

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
  font-size: var(--text-xs);
  color: var(--color-text-light);
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 64px;
  }

  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--space-xl);
    gap: var(--space-lg);
    display: none;
    box-shadow: var(--shadow-lg);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
}