/* kalzium.io - Main Stylesheet */

/* ============================================================
   GLOBAL STYLES - CSS Variables, Reset, Base Styles
   ============================================================ */

/* CSS Variables - Color Palette */
:root {
  --color-bg-primary: #0d0d0d;
  --color-bg-secondary: #171717;
  --color-bg-tertiary: #262626;
  --color-bg-hover: #333333;
  
  --color-accent: #e8cca4;
  --color-accent-strong: #e99b2d;
  
  --color-text-primary: #e4e4e7;
  --color-text-secondary: #a1a1aa;
  --color-btn-primary-text: #0d0d0d;
  --color-text-muted: #71717a;

  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'JetBrains Mono', monospace;
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  font-size: 14px;
  background-image: url('/static/images/bg-pattern.svg');
  background-size: cover;
  background-attachment: fixed;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--color-accent-strong);
}

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

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

h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--color-text-primary);
}

h2 {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  color: var(--color-text-primary);
}

h3 {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  color: var(--color-text-primary);
}

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

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

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-block;
  padding: 0.75rem 2rem;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-btn-primary-text);
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background-color: var(--color-accent-strong);
  border-color: var(--color-accent-strong);
  color: var(--color-btn-primary-text);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn-secondary:hover {
  background-color: var(--color-accent);
  color: var(--color-btn-primary-text);
}

/* ============================================================
   SECTIONS
   ============================================================ */

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

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

/* ============================================================
   NAVIGATION BAR
   ============================================================ */

nav {
  background-color: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-bg-tertiary);
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
}

.nav-container {
  margin: 0 auto;
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-accent);
}

.logo img {
  height: 64px;
  width: auto;
}

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

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

.nav-links a {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  transition: color 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-accent);
}

.auth-buttons {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.auth-buttons .btn {
  font-size: 0.9rem;
  padding: 0.5rem 1.5rem;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

.menu-backdrop {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 999;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.menu-backdrop.active {
  display: block;
  opacity: 1;
}

/* ============================================================
   HERO SECTION
   ============================================================ */

.hero {
  padding: var(--spacing-xl) 0;
  text-align: center;
  background: linear-gradient(135deg, 
    #1a1a1a 0%, 
    #2d1810 25%, 
    #1f1510 50%, 
    #171717 75%, 
    #0d0d0d 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 50%, rgba(232, 204, 164, 0.08) 0%, transparent 50%),
              radial-gradient(circle at 80% 80%, rgba(233, 155, 45, 0.06) 0%, transparent 50%);
  pointer-events: none;
}

.hero > .container {
  position: relative;
  z-index: 1;
}

.hero h1 {
  margin-bottom: var(--spacing-sm);
}

.hero-title {
  line-height: 1.4;
}

.animated-word {
  color: var(--color-accent-strong);
  font-weight: 700;
  display: inline-block;
  min-width: 200px;
  text-align: center;
  position: relative;
}

.animated-word::after {
  content: '|';
  color: var(--color-accent);
  animation: blink 1s infinite;
  margin-left: 2px;
}

@keyframes blink {
  0%, 50% {
    opacity: 1;
  }
  51%, 100% {
    opacity: 0;
  }
}

.hero p {
  font-size: 1rem;
  margin-bottom: var(--spacing-md);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================================
   FEATURE CARDS
   ============================================================ */

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.feature-card {
  background-color: rgba(23, 23, 23, 0.6);
  border: 1px solid rgba(38, 38, 38, 0.8);
  border-radius: 8px;
  padding: var(--spacing-md);
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(232, 204, 164, 0.1), transparent);
  transition: left 0.5s ease;
}

.feature-card:hover::before {
  left: 100%;
}

.feature-card:hover {
  background-color: rgba(51, 51, 51, 0.7);
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px 0 rgba(232, 204, 164, 0.2);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-accent);
}

.feature-card h3 {
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-xs);
}

.feature-card p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

/* ============================================================
   PRODUCT OVERVIEW
   ============================================================ */

.product-overview {
  background-color: rgba(23, 23, 23, 0.6);
  border: 1px solid rgba(38, 38, 38, 0.8);
  border-radius: 8px;
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  position: relative;
  overflow: hidden;
}

.product-overview::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(232, 204, 164, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.product-overview h2 {
  margin-bottom: var(--spacing-md);
}

.product-overview ul {
  list-style: none;
  margin-top: var(--spacing-md);
}

.product-overview li {
  padding: var(--spacing-xs) 0;
  color: var(--color-text-secondary);
}

.product-overview li:before {
  content: "→ ";
  color: var(--color-accent);
  font-weight: bold;
  margin-right: var(--spacing-xs);
}

/* ============================================================
   PRICING CARDS
   ============================================================ */

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.pricing-card {
  background-color: rgba(23, 23, 23, 0.6);
  border: 2px solid rgba(38, 38, 38, 0.8);
  border-radius: 8px;
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  position: relative;
  overflow: hidden;
}

.pricing-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  opacity: 0.3;
}

.pricing-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px 0 rgba(232, 204, 164, 0.2);
}

.pricing-card.featured {
  border-color: var(--color-accent);
  background-color: rgba(51, 51, 51, 0.7);
  position: relative;
  box-shadow: 0 12px 40px 0 rgba(232, 204, 164, 0.25);
}

.pricing-card.featured::before {
  content: "RECOMMENDED";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-accent);
  color: var(--color-btn-primary-text);
  padding: 0.25rem 1rem;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 4px;
}

.pricing-card h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
}

.pricing-card .price {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: var(--spacing-xs);
}

.pricing-card .price-period {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
}

.pricing-card .limits li {
  color: var(--color-accent);
  font-size: 1.1rem;
}

.pricing-card .limits ul {
  margin-bottom: 0;
}

.pricing-card ul {
  list-style: none;
  margin-bottom: var(--spacing-md);
  flex-grow: 1;
}

.pricing-card li {
  padding: var(--spacing-xs) 0;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

.pricing-card li:before {
  content: "✓ ";
  color: var(--color-accent);
  font-weight: bold;
  margin-right: var(--spacing-xs);
}

/* ============================================================
   ABOUT/CONTACT PAGE
   ============================================================ */

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.about-section {
  background-color: rgba(23, 23, 23, 0.6);
  border: 1px solid rgba(38, 38, 38, 0.8);
  border-radius: 8px;
  padding: var(--spacing-md);
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  position: relative;
}

.about-section::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(232, 204, 164, 0.3), transparent);
}

.about-section h3 {
  margin-bottom: var(--spacing-md);
  color: var(--color-accent);
}

.contact-info {
  list-style: none;
}

.contact-info li {
  padding: var(--spacing-xs) 0;
  color: var(--color-text-secondary);
}

.contact-info strong {
  color: var(--color-text-primary);
  margin-right: var(--spacing-xs);
}

/* ============================================================
   FOOTER
   ============================================================ */

footer {
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-bg-tertiary);
  padding: var(--spacing-lg) 0 var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.footer-content {
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

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

.footer-links a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--color-accent);
}

.copyright {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* ============================================================
   PRIVACY POLICY PAGE
   ============================================================ */

.privacy-content {
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.privacy-content h1 {
  color: var(--color-text-primary);
  font-size: 2.5rem;
  margin-top: 2rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-bg-tertiary);
}

.privacy-content h2 {
  color: var(--color-text-primary);
  font-size: 1.75rem;
  margin-top: 3rem;
  margin-bottom: 1rem;
}

.privacy-content h3 {
  color: var(--color-accent);
  font-size: 1.25rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.privacy-content p {
  margin-bottom: 1rem;
}

.privacy-content ul,
.privacy-content ol {
  margin-left: 2rem;
  margin-bottom: 1.5rem;
  color: var(--color-text-secondary);
}

.privacy-content li {
  margin-bottom: 0.5rem;
}

.privacy-content strong {
  color: var(--color-accent);
  font-weight: 600;
}

.privacy-content a {
  color: var(--color-accent);
  text-decoration: underline;
}

.privacy-content a:hover {
  color: var(--color-accent-strong);
}

.privacy-content code {
  background-color: var(--color-bg-tertiary);
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9em;
  color: var(--color-accent);
}

/* ============================================================
   RESPONSIVE DESIGN - MEDIA QUERIES
   ============================================================ */

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-bg-secondary);
    flex-direction: column;
    padding: var(--spacing-md);
    border-top: 1px solid var(--color-bg-tertiary);
    gap: var(--spacing-md);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .nav-links {
    flex-direction: column;
    width: 100%;
    gap: var(--spacing-sm);
  }
  
  .auth-buttons {
    flex-direction: column;
    width: 100%;
    gap: var(--spacing-sm);
  }
  
  .btn-login,
  .btn-register {
    width: 100%;
    text-align: center;
    padding: 0.75rem;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .hero {
    padding: var(--spacing-lg) 0;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-sm);
  }
  
  .footer-links {
    flex-direction: column;
    gap: var(--spacing-xs);
    align-items: center;
  }
  
  .copyright {
    order: 2;
    margin-top: var(--spacing-sm);
  }
  
  .cta-buttons {
    flex-direction: column;
    align-items: stretch;
  }
  
  .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
}