/* ============================================
   KNOX CONTRACTOR NETWORK
   Design System & Styles
   ============================================ */

/* ----- CSS Variables ----- */
:root {
  /* Colors */
  --color-primary: #1e293b;
  --color-primary-light: #334155;
  --color-accent: #ea580c;
  --color-accent-dark: #c2410c;
  --color-accent-light: #fb923c;
  --color-secondary: #0369a1;
  --color-secondary-light: #0ea5e9;
  --color-background: #faf9f7;
  --color-surface: #ffffff;
  --color-muted: #64748b;
  --color-muted-light: #94a3b8;
  --color-border: #e2e8f0;
  --color-text: #1e293b;
  --color-text-light: #475569;

  /* Typography */
  --font-display: 'Archivo Black', sans-serif;
  --font-body: 'Source Sans 3', sans-serif;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Sizing */
  --container-max: 1200px;
  --header-height: 72px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input {
  font-family: inherit;
}

/* ----- Container ----- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ----- Typography ----- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.025em;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.btn-primary {
  background-color: var(--color-accent);
  color: white;
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.btn-primary:hover {
  background-color: var(--color-accent-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary:focus-visible {
  outline: 3px solid var(--color-accent-light);
  outline-offset: 2px;
}

/* ============================================
   HEADER
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: rgba(250, 249, 247, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.logo-knox {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-primary);
  letter-spacing: 0.05em;
}

.logo-network {
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-light);
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-accent);
}

.btn-nav {
  padding: var(--space-sm) var(--space-lg);
  font-size: 0.85rem;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-sm);
}

.nav-toggle-bar {
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  transition: all var(--transition-fast);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(30, 41, 59, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 41, 59, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

.hero-shapes {
  position: absolute;
  inset: 0;
}

.shape {
  position: absolute;
  background-color: var(--color-accent);
  opacity: 0.08;
}

.shape-1 {
  width: 400px;
  height: 400px;
  top: 10%;
  right: -100px;
  transform: rotate(45deg);
}

.shape-2 {
  width: 200px;
  height: 200px;
  bottom: 20%;
  left: -50px;
  transform: rotate(30deg);
}

.shape-3 {
  width: 150px;
  height: 150px;
  top: 60%;
  right: 20%;
  transform: rotate(-15deg);
  background-color: var(--color-secondary);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: var(--space-4xl) 0;
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 5rem);
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  animation: fadeInUp 0.8s ease-out;
}

.hero-tagline-es {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: var(--space-lg);
  animation: fadeInUp 0.8s ease-out 0.1s both;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  color: var(--color-text-light);
  max-width: 600px;
  margin-bottom: var(--space-2xl);
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

/* ----- Waitlist Form ----- */
.waitlist-form {
  animation: fadeInUp 0.8s ease-out 0.3s both;
}

.form-row {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.form-input {
  flex: 1;
  min-width: 280px;
  padding: var(--space-md) var(--space-lg);
  font-size: 1rem;
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.form-input::placeholder {
  color: var(--color-muted-light);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(234, 88, 12, 0.1);
}

.btn-submit {
  white-space: nowrap;
}

.btn-text-es {
  display: none;
}

.form-note {
  margin-top: var(--space-md);
  font-size: 0.875rem;
  color: var(--color-muted);
}

/* ============================================
   PROBLEMS SECTION
   ============================================ */
.problems {
  padding: var(--space-4xl) 0;
  background-color: var(--color-surface);
}

.problems-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-2xl);
  margin-bottom: var(--space-3xl);
}

.problem-card {
  padding: var(--space-2xl);
  background-color: var(--color-background);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--color-accent);
}

.problem-icon {
  width: 48px;
  height: 48px;
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
}

.problem-title {
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.problem-title-es {
  font-size: 1rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.problem-text {
  color: var(--color-text-light);
  font-size: 1.05rem;
}

.problems-solution {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  padding: var(--space-2xl);
  background: linear-gradient(135deg, rgba(234, 88, 12, 0.05), rgba(3, 105, 161, 0.05));
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.solution-text {
  font-size: 1.15rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

.solution-text strong {
  color: var(--color-primary);
}

/* ============================================
   FEATURES SECTION
   ============================================ */
.features {
  padding: var(--space-4xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.section-subtitle {
  font-size: 1.15rem;
  color: var(--color-muted);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.feature-card {
  padding: var(--space-xl);
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  border: 1px solid transparent;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-accent);
}

.feature-icon {
  width: 40px;
  height: 40px;
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
}

.feature-title {
  font-family: var(--font-body);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.feature-text {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

/* ============================================
   HOW IT WORKS SECTION
   ============================================ */
.how-it-works {
  padding: var(--space-4xl) 0;
  background-color: var(--color-surface);
}

.steps-grid {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.step-card {
  flex: 1;
  min-width: 250px;
  max-width: 320px;
  text-align: center;
  padding: var(--space-xl);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--color-surface);
  background-color: var(--color-accent);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-lg);
  box-shadow: var(--shadow-lg);
}

.step-title {
  font-family: var(--font-body);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.step-text {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

.step-connector {
  display: none;
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-secondary));
  margin-top: 32px;
}

@media (min-width: 900px) {
  .step-connector {
    display: block;
  }
}

/* ============================================
   COMMUNITY SECTION
   ============================================ */
.community {
  padding: var(--space-4xl) 0;
  background: linear-gradient(180deg, var(--color-background), var(--color-surface));
}

.community-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

@media (min-width: 768px) {
  .community-content {
    grid-template-columns: 1fr 1fr;
  }
}

.community-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.community-subtitle {
  font-size: 1rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: var(--space-lg);
}

.community-description {
  font-size: 1.1rem;
  color: var(--color-text-light);
  margin-bottom: var(--space-xl);
  line-height: 1.7;
}

.community-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.community-list li {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: 1rem;
  color: var(--color-text);
  font-weight: 500;
}

.check-icon {
  width: 20px;
  height: 20px;
  color: var(--color-accent);
  flex-shrink: 0;
}

/* Knoxville Graphic */
.community-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.knoxville-graphic {
  position: relative;
  width: 100%;
  max-width: 400px;
  height: 250px;
}

.skyline {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: flex-end;
  gap: 8px;
  z-index: 2;
}

.building {
  background-color: var(--color-primary);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.b1 { width: 40px; height: 80px; }
.b2 { width: 50px; height: 120px; }
.b3 { width: 45px; height: 100px; }
.b4 { width: 35px; height: 60px; }

.sunsphere {
  width: 30px;
  height: 140px;
  background: linear-gradient(180deg, var(--color-accent) 0%, var(--color-accent) 25px, var(--color-primary-light) 25px);
  border-radius: 50% 50% 0 0 / 20px 20px 0 0;
  position: relative;
}

.sunsphere::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 26px;
  height: 26px;
  background-color: var(--color-accent);
  border-radius: 50%;
  box-shadow: 0 0 20px rgba(234, 88, 12, 0.4);
}

.mountains {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: linear-gradient(135deg, var(--color-muted-light) 25%, transparent 25%),
              linear-gradient(-135deg, var(--color-muted-light) 25%, transparent 25%),
              linear-gradient(45deg, var(--color-muted) 15%, transparent 15%),
              linear-gradient(-45deg, var(--color-muted) 15%, transparent 15%);
  background-size: 80px 60px, 80px 60px, 120px 60px, 120px 60px;
  background-position: 0 100%, 40px 100%, 20px 100%, 60px 100%;
  opacity: 0.3;
}

/* ============================================
   FINAL CTA SECTION
   ============================================ */
.final-cta {
  padding: var(--space-4xl) 0;
  background-color: var(--color-primary);
  position: relative;
  overflow: hidden;
}

.final-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
}

.cta-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.cta-title {
  font-size: clamp(2rem, 5vw, 3rem);
  color: var(--color-surface);
  margin-bottom: var(--space-sm);
}

.cta-subtitle {
  font-size: 1.1rem;
  color: var(--color-accent-light);
  font-weight: 600;
  margin-bottom: var(--space-lg);
}

.cta-description {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--space-2xl);
  line-height: 1.7;
}

.waitlist-form-cta .form-row {
  justify-content: center;
}

.waitlist-form-cta .form-input {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  color: white;
}

.waitlist-form-cta .form-input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.waitlist-form-cta .form-input:focus {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: var(--color-accent);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: var(--space-2xl) 0;
  background-color: var(--color-primary);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
  text-align: center;
}

@media (min-width: 640px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--color-surface);
  letter-spacing: 0.05em;
}

.footer-tagline {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  margin-top: var(--space-xs);
}

.footer-copyright {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
  }

  .nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    gap: var(--space-lg);
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.is-active .nav-toggle-bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle.is-active .nav-toggle-bar:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.is-active .nav-toggle-bar:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero {
    min-height: auto;
    padding-top: calc(var(--header-height) + var(--space-2xl));
    padding-bottom: var(--space-2xl);
  }

  .hero-content {
    padding: var(--space-2xl) 0;
  }

  .form-row {
    flex-direction: column;
  }

  .form-input {
    min-width: 100%;
  }

  .btn-text-en {
    display: none;
  }

  .btn-text-es {
    display: inline;
  }

  .btn-submit::after {
    content: ' / Join';
  }

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

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

  .steps-grid {
    flex-direction: column;
    align-items: center;
  }

  .step-card {
    max-width: 100%;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

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

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --color-border: #1e293b;
  }

  .feature-card {
    border: 2px solid var(--color-primary);
  }
}