/* ===================================
   Kupfer Kontor - Design System
   =================================== */

/* CSS Variables */
:root {
  --navy: #071B2A;
  --copper: #B87333;
  --offwhite: #F6F2EC;
  --slate: #2C3B45;
  --success: #1F8A5B;
  --warn: #C07A2B;
  
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-heading: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  --shadow-sm: 0 2px 4px rgba(7, 27, 42, 0.08);
  --shadow-md: 0 4px 12px rgba(7, 27, 42, 0.12);
  --shadow-lg: 0 8px 24px rgba(7, 27, 42, 0.16);
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  --transition: 0.2s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--navy);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-sm);
}

a {
  color: var(--copper);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover, a:focus {
  color: var(--navy);
  text-decoration: underline;
}

/* Skip to content */
.skip-to-content {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--navy);
  color: white;
  padding: var(--spacing-sm);
  z-index: 1000;
}

.skip-to-content:focus {
  top: 0;
}

/* Header */
.header {
  background: var(--navy);
  color: white;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
  text-decoration: none;
}

.logo:hover, .logo:focus {
  text-decoration: none;
  color: var(--copper);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--spacing-md);
}

.nav-link {
  color: white;
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  transition: color var(--transition);
}

.nav-link:hover, .nav-link:focus {
  color: var(--copper);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.header-cta {
  background: var(--copper);
  color: white;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: background var(--transition), transform var(--transition);
  border: none;
  cursor: pointer;
}

.header-cta:hover, .header-cta:focus {
  background: #9A5F29;
  text-decoration: none;
  transform: translateY(-2px);
  color: white;
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }
  
  .nav {
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--navy);
    flex-direction: column;
    padding: var(--spacing-md);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    box-shadow: var(--shadow-lg);
  }
  
  .nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-list {
    flex-direction: column;
    width: 100%;
    gap: 0;
  }
  
  .nav-link {
    display: block;
    padding: var(--spacing-sm);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  .header-cta {
    display: none;
  }
}

/* Floating CTA (Mobile) */
.floating-cta {
  display: none;
  position: fixed;
  bottom: var(--spacing-md);
  right: var(--spacing-md);
  background: var(--copper);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-lg);
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  z-index: 99;
  transition: transform var(--transition);
}

.floating-cta:hover, .floating-cta:focus {
  transform: scale(1.05);
  color: white;
  text-decoration: none;
}

@media (max-width: 768px) {
  .floating-cta {
    display: block;
  }
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-2xl) 0;
}

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

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--slate) 100%);
  color: white;
  padding: var(--spacing-2xl) 0;
  text-align: center;
}

.hero h1 {
  color: white;
  margin-bottom: var(--spacing-md);
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.25rem);
  margin-bottom: var(--spacing-xl);
  opacity: 0.95;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta-group {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: 600;
  text-align: center;
  transition: all var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
  font-size: 1rem;
  text-decoration: none;
}

.btn-primary {
  background: var(--copper);
  color: white;
}

.btn-primary:hover, .btn-primary:focus {
  background: #9A5F29;
  color: white;
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: transparent;
  color: white;
  border-color: white;
}

.btn-secondary:hover, .btn-secondary:focus {
  background: white;
  color: var(--navy);
  text-decoration: none;
}

.btn-outline {
  background: transparent;
  color: var(--copper);
  border-color: var(--copper);
}

.btn-outline:hover, .btn-outline:focus {
  background: var(--copper);
  color: white;
  text-decoration: none;
}

/* Trust Bar */
.trust-bar {
  background: var(--offwhite);
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid rgba(44, 59, 69, 0.1);
}

.trust-items {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  flex-wrap: wrap;
  list-style: none;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-weight: 500;
  color: var(--slate);
}

.trust-item::before {
  content: "✓";
  color: var(--success);
  font-weight: bold;
  font-size: 1.2rem;
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.card {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.card-icon {
  width: 64px;
  height: 64px;
  margin-bottom: var(--spacing-md);
  display: block;
}

.card h3 {
  margin-bottom: var(--spacing-sm);
}

.card p {
  margin-bottom: 0;
  color: var(--slate);
}

/* Eyebrow */
.eyebrow {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--copper);
  margin-bottom: var(--spacing-sm);
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--spacing-xl);
}

.section-header h2 {
  margin-bottom: var(--spacing-sm);
}

/* Feature List */
.feature-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.feature-item::before {
  content: "→";
  color: var(--copper);
  font-weight: bold;
  font-size: 1.2rem;
  flex-shrink: 0;
}

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.step {
  text-align: center;
}

.step-number {
  width: 60px;
  height: 60px;
  background: var(--copper);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: bold;
  margin: 0 auto var(--spacing-md);
}

.step h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xs);
}

/* Warning Box */
.warning-box {
  background: #FFF8E7;
  border-left: 4px solid var(--warn);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin: var(--spacing-md) 0;
}

.warning-box strong {
  color: var(--warn);
}

/* Info Box */
.info-box {
  background: #E8F5E9;
  border-left: 4px solid var(--success);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin: var(--spacing-md) 0;
}

/* Form */
.form-section {
  max-width: 700px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--navy);
}

.form-label .required {
  color: var(--warn);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-sm);
  border: 2px solid #ddd;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color var(--transition);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--copper);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-checkbox-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-xs);
}

.form-checkbox input[type="checkbox"] {
  margin-top: 4px;
  flex-shrink: 0;
}

.form-error {
  color: #d32f2f;
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
  display: none;
}

.form-group.error .form-error {
  display: block;
}

.form-group.error .form-input,
.form-group.error .form-textarea,
.form-group.error .form-select {
  border-color: #d32f2f;
}

.form-success {
  background: var(--success);
  color: white;
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
  display: none;
}

.form-success.show {
  display: block;
}

.btn-submit {
  width: 100%;
  padding: var(--spacing-md);
  font-size: 1.1rem;
}

.btn-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-submit.loading {
  position: relative;
  color: transparent;
}

.btn-submit.loading::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  top: 50%;
  left: 50%;
  margin-left: -10px;
  margin-top: -10px;
  border: 3px solid white;
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: white;
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  padding: var(--spacing-md);
  background: none;
  border: none;
  text-align: left;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--navy);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
}

.faq-question::after {
  content: "+";
  font-size: 1.5rem;
  color: var(--copper);
  transition: transform var(--transition);
  flex-shrink: 0;
}

.faq-question.active::after {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer-inner {
  padding: 0 var(--spacing-md) var(--spacing-md);
  color: var(--slate);
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

/* Table */
.table-responsive {
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

th, td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--offwhite);
}

th {
  background: var(--offwhite);
  font-weight: 600;
  color: var(--navy);
}

tr:hover {
  background: var(--offwhite);
}

/* Footer */
.footer {
  background: var(--navy);
  color: white;
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
  color: white;
  margin-bottom: var(--spacing-md);
  font-size: 1.25rem;
}

.footer-section p,
.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--spacing-xs);
}

.footer-section a:hover,
.footer-section a:focus {
  color: var(--copper);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-md);
  text-align: center;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
}

/* Contact Info */
.contact-info {
  list-style: none;
}

.contact-info li {
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-xs);
}

.contact-info strong {
  min-width: 100px;
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Print Styles */
@media print {
  .header, .floating-cta, .nav {
    display: none;
  }
}