/* ==========================================================================
   Kosany Tech – Offizielle Website Stylesheet
   Theme: Deep Navy (#0B1325) / Cobalt Blue (#2563EB)
   ========================================================================== */

:root {
  --bg-main: #0B1325;
  --bg-darker: #060B17;
  --bg-card: #131E36;
  --bg-card-hover: #182645;
  --bg-glass: rgba(11, 19, 37, 0.85);
  --border-color: #1E293B;
  --border-light: rgba(255, 255, 255, 0.08);
  --border-focus: #2563EB;
  
  --accent: #2563EB;
  --accent-hover: #1D4ED8;
  --accent-light: rgba(37, 99, 235, 0.15);
  --accent-border: rgba(37, 99, 235, 0.35);
  
  --text-main: #FFFFFF;
  --text-secondary: #CBD5E1;
  --text-muted: #94A3B8;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Inter', Helvetica, Arial, sans-serif;
  --max-width: 1200px;
  --nav-height: 76px;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-main);
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-secondary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Background Gradients */
.bg-glow {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  background: 
    radial-gradient(circle at 50% -10%, rgba(37, 99, 235, 0.18) 0%, transparent 60%),
    radial-gradient(circle at 90% 40%, rgba(37, 99, 235, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 10% 80%, rgba(37, 99, 235, 0.06) 0%, transparent 50%);
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  display: flex;
  align-items: center;
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: var(--accent);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 16px;
  color: #FFFFFF;
  letter-spacing: -0.5px;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
  flex-shrink: 0;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-main);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--accent);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.04);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.08);
  border-color: var(--border-light);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 15px;
  border-radius: var(--radius-md);
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
}

/* Mobile Menu - Hidden by default on Desktop */
.mobile-menu {
  display: none !important;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
  padding: 96px 0 72px;
  text-align: center;
  position: relative;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--accent-light);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-full);
  color: #93C5FD;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.2px;
  margin-bottom: 24px;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

.hero-title {
  font-size: 48px;
  font-weight: 800;
  letter-spacing: -1.2px;
  color: var(--text-main);
  line-height: 1.15;
  max-width: 820px;
  margin: 0 auto 20px;
}

.hero-title .highlight {
  color: #3B82F6;
}

.hero-subtitle {
  font-size: 18px;
  line-height: 1.65;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 36px;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.hero-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 900px;
  margin: 0 auto;
  padding-top: 36px;
  border-top: 1px solid var(--border-color);
}

.hero-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  text-align: left;
  background: rgba(19, 30, 54, 0.4);
  padding: 16px 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.feature-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}

.feature-texts strong {
  display: block;
  font-size: 14px;
  color: var(--text-main);
  font-weight: 600;
}

.feature-texts span {
  font-size: 12px;
  color: var(--text-muted);
}

/* ==========================================================================
   Section Components
   ========================================================================== */

.section {
  padding: 96px 0;
  position: relative;
}

.section-alt {
  background: rgba(6, 11, 23, 0.4);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #60A5FA;
  margin-bottom: 12px;
}

.section-title {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.8px;
  color: var(--text-main);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Grids */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-5 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

/* Cards */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-3px);
  border-color: rgba(37, 99, 235, 0.4);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
  background-color: var(--bg-card-hover);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--accent-light);
  border: 1px solid var(--accent-border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #60A5FA;
  margin-bottom: 20px;
}

.card-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}

.card-text {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.65;
}

/* Use Case Cards */
.usecase-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: var(--transition);
}

.usecase-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.usecase-badge {
  font-size: 12px;
  font-weight: 700;
  color: #93C5FD;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.usecase-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.usecase-text {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.55;
}

/* ==========================================================================
   Contact / CTA Section
   ========================================================================== */

.contact-card {
  background: linear-gradient(135deg, rgba(19, 30, 54, 0.9) 0%, rgba(11, 19, 37, 0.95) 100%);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-xl);
  padding: 56px 40px;
  text-align: center;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 250px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.25) 0%, transparent 70%);
  pointer-events: none;
}

.contact-title {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
  letter-spacing: -0.6px;
}

.contact-desc {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 580px;
  margin: 0 auto 32px;
  line-height: 1.6;
}

.contact-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.contact-email-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  padding: 12px 24px;
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
}

.contact-email-badge:hover {
  border-color: var(--accent);
  background: rgba(37, 99, 235, 0.1);
  color: #93C5FD;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background: var(--bg-darker);
  border-top: 1px solid var(--border-color);
  padding: 64px 0 32px;
  font-size: 14px;
  color: var(--text-muted);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-about p {
  margin-top: 16px;
  max-width: 360px;
  line-height: 1.6;
  font-size: 14px;
}

.footer-heading {
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-main);
  margin-bottom: 18px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  background: none;
  border: none;
  font-size: 14px;
  text-align: left;
  padding: 0;
  font-family: inherit;
}

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

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: #64748B;
}

/* ==========================================================================
   Modal Dialogs
   ========================================================================== */

.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(6, 11, 23, 0.85);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.modal-dialog {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  max-width: 540px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6);
  position: relative;
  transform: scale(0.95);
  transition: var(--transition);
}

.modal-backdrop.active .modal-dialog {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-main);
}

.modal-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
  letter-spacing: -0.4px;
}

.modal-subtitle {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 20px;
  text-align: center;
}

.modal-body {
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--text-secondary);
}

.modal-body p {
  margin-bottom: 12px;
}

.modal-body h4 {
  font-size: 16px;
  color: var(--text-main);
  margin: 18px 0 6px;
}

/* Auth Modal & Form Elements */
.auth-modal-header {
  text-align: center;
  margin-bottom: 8px;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: left;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-input {
  width: 100%;
  padding: 12px 14px;
  background-color: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-family: inherit;
  font-size: 14px;
  transition: var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.form-input::placeholder {
  color: #475569;
}

.form-hint {
  font-size: 11.5px;
  color: var(--text-muted);
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
}

.auth-alert {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 13.5px;
  line-height: 1.5;
  margin-bottom: 16px;
  text-align: left;
}

.auth-alert.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #FCA5A5;
}

.auth-alert.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: #FCD34D;
}

.auth-alert.alert-success {
  background: rgba(37, 99, 235, 0.12);
  border: 1px solid var(--accent-border);
  color: #93C5FD;
}

.auth-alert.alert-info {
  background: rgba(37, 99, 235, 0.1);
  border: 1px solid var(--accent-border);
  color: #93C5FD;
}

.auth-modal-footer {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}

.link-btn {
  background: none;
  border: none;
  color: #60A5FA;
  font-size: inherit;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.link-btn:hover {
  color: #93C5FD;
}

.resend-box {
  margin-top: 16px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  text-align: center;
  font-size: 13px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}

.auth-success-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--accent-light);
  border: 1px solid var(--accent-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.auth-card-message {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  text-align: left;
}

/* Account Profile Card */
.account-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-top: 8px;
}

.account-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--accent);
  color: #FFFFFF;
  font-weight: 800;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}

.account-details {
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-align: left;
  overflow: hidden;
}

.account-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.account-email {
  font-size: 13.5px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: rgba(37, 99, 235, 0.15);
  color: #60A5FA;
  border: 1px solid rgba(37, 99, 235, 0.3);
  width: fit-content;
  margin-top: 4px;
}

.auth-btn-group, .mobile-auth-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mobile-auth-group {
  flex-direction: column;
  width: 100%;
}

.hidden {
  display: none !important;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: #FFFFFF;
  animation: spin 0.8s linear infinite;
  display: inline-block;
}

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

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

@media (max-width: 960px) {
  .hero-title {
    font-size: 38px;
  }
  
  .hero-features {
    grid-template-columns: 1fr;
    max-width: 480px;
  }
  
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  
  .footer-about {
    grid-column: span 2;
  }
}

@media (max-width: 768px) {
  .nav-links, .nav-actions {
    display: none;
  }
  
  .mobile-toggle {
    display: block;
  }
  
  /* Mobile Menu */
  .mobile-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg-main);
    border-bottom: 1px solid var(--border-color);
    padding: 24px;
    display: none;
    flex-direction: column;
    gap: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
  }
  
  .mobile-menu.active {
    display: flex !important;
  }
  
  .mobile-menu .nav-link {
    font-size: 16px;
    padding: 8px 0;
  }
  
  .mobile-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 12px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
  }
  
  .hero-title {
    font-size: 32px;
  }
  
  .hero-subtitle {
    font-size: 16px;
  }
  
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }
  
  .section-title {
    font-size: 28px;
  }
  
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .footer-about {
    grid-column: span 1;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}