/* ============================================
   Bizobix - Enterprise Marketing Website
   Design System: Clean, Professional, B2B
   ============================================ */

/* --- CSS Variables --- */
:root {
  /* Colors - Enterprise blue/purple palette */
  --color-primary: #1e3a5f;
  --color-primary-dark: #152a45;
  --color-primary-light: #2d4a6f;
  --color-accent: #4f46e5;
  --color-accent-hover: #4338ca;
  --color-accent-light: #eef2ff;
  
  /* Neutrals */
  --color-white: #ffffff;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  
  /* Semantic */
  --color-success: #059669;
  --color-warning: #d97706;
  --color-error: #dc2626;
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Inter', var(--font-sans);
  
  /* 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;
  
  /* Layout */
  --max-width: 1200px;
  --header-height: 72px;
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --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);
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-gray-800);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
}

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

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

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

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-md);
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-gray-900);
}

h1 { font-size: clamp(2rem, 5vw, 2.75rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.5rem); }

p {
  margin: 0 0 var(--space-md);
  color: var(--color-gray-600);
}

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

.section {
  padding: var(--space-4xl) 0;
}

.section--alt {
  background-color: var(--color-gray-50);
}

/* --- Header --- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  position: relative;
}

.header__logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
}

.header__logo img {
  height: 40px;
  width: auto;
  display: block;
}

.header__logo:hover {
  color: var(--color-primary-dark);
}

.header__logo:hover img {
  opacity: 0.9;
}

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

.header__nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
  margin: 0;
  padding: 0;
}

.header__nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-gray-600);
  text-decoration: none;
  padding: var(--space-sm) var(--space-sm);
  border-radius: var(--border-radius);
  transition: color var(--transition), background var(--transition);
}

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

.header__nav-link--active {
  color: var(--color-primary);
  font-weight: 600;
}

.header__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-white);
  background: var(--color-accent);
  border: none;
  border-radius: var(--border-radius);
  text-decoration: none;
  transition: background var(--transition), transform var(--transition);
}

.header__cta:hover {
  background: var(--color-accent-hover);
}

/* Mobile menu */
.header__menu-toggle {
  display: none;
  background: none;
  border: none;
  padding: var(--space-sm);
  cursor: pointer;
}

.header__menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-gray-700);
  margin: 5px 0;
  transition: var(--transition);
}

@media (max-width: 768px) {
  .header__nav-links {
    display: none;
  }
  
  .header__nav-links--open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-white);
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-gray-200);
    box-shadow: var(--shadow-md);
  }
  
  .header__menu-toggle {
    display: block;
  }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  border-radius: var(--border-radius);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition);
}

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

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

.btn--secondary {
  color: var(--color-primary);
  background: var(--color-white);
  border: 2px solid var(--color-primary);
}

.btn--secondary:hover {
  background: var(--color-gray-50);
}

.btn--outline {
  color: var(--color-gray-700);
  background: transparent;
  border: 2px solid var(--color-gray-300);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* --- Hero --- */
.hero {
  padding: var(--space-4xl) 0;
  background: linear-gradient(180deg, var(--color-gray-50) 0%, var(--color-white) 100%);
}

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

.hero__content h1 {
  margin-bottom: var(--space-lg);
  color: var(--color-primary);
}

.hero__content p {
  font-size: 1.125rem;
  margin-bottom: var(--space-xl);
  max-width: 540px;
}

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

.hero__image {
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.hero__image img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
}

@media (max-width: 768px) {
  .hero__grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  
  .hero__image {
    order: -1;
  }
}

/* --- Cards --- */
.card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  transition: box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-gray-300);
}

.card__title {
  margin-bottom: var(--space-sm);
}

.card__text {
  margin: 0;
  font-size: 0.9375rem;
}

/* --- Feature Grid --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.features-grid .card {
  display: flex;
  flex-direction: column;
}

.features-grid .card img {
  margin-top: auto;
}

.feature-card {
  padding: var(--space-lg);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--border-radius);
  transition: all var(--transition);
}

.feature-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.feature-card__title {
  font-size: 1rem;
  margin-bottom: var(--space-sm);
}

.feature-card__text {
  font-size: 0.875rem;
  margin: 0;
}

/* --- Trust Banner --- */
.trust-banner {
  padding: var(--space-xl);
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--border-radius-lg);
  text-align: center;
}

.trust-banner h3 {
  color: var(--color-white);
  margin-bottom: var(--space-sm);
}

.trust-banner p {
  color: rgba(255, 255, 255, 0.9);
  margin: 0;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* --- How it Works --- */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-xl);
  counter-reset: step;
}

.step {
  position: relative;
  text-align: center;
  display: flex;
  flex-direction: column;
}

.step::before {
  counter-increment: step;
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-md);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-white);
  background: var(--color-primary);
  border-radius: 50%;
}

.step__title {
  font-size: 1rem;
  margin-bottom: var(--space-sm);
}

.step__text {
  font-size: 0.875rem;
  margin: 0;
}

.step__image {
  margin-top: auto;
  border-radius: var(--border-radius);
  overflow: hidden;
  background: var(--color-gray-100);
}

.step__image img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

/* --- CTA Section --- */
.cta-section {
  padding: var(--space-4xl) 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  text-align: center;
}

.cta-section h2 {
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.cta-section p {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

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

.cta-section .btn--primary:hover {
  background: var(--color-gray-100);
}

/* --- Footer --- */
.footer {
  padding: var(--space-3xl) 0 var(--space-xl);
  background: var(--color-gray-900);
  color: var(--color-gray-400);
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.footer__top {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
  padding-bottom: var(--space-2xl);
  border-bottom: 1px solid var(--color-gray-700);
}

.footer__brand {
  flex: 1;
  min-width: 200px;
}

.footer__logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-white);
  text-decoration: none;
  margin-bottom: var(--space-md);
  display: block;
}


.footer__tagline {
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.footer__contact {
  font-size: 0.875rem;
}

.footer__contact a {
  color: var(--color-gray-400);
}

.footer__contact a:hover {
  color: var(--color-white);
}

.footer__links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer__links a {
  color: var(--color-gray-400);
  font-size: 0.875rem;
}

.footer__links a:hover {
  color: var(--color-white);
}

.footer__bottom {
  font-size: 0.8125rem;
  color: var(--color-gray-500);
}

@media (max-width: 768px) {
  .footer__top {
    flex-direction: column;
  }

  .footer__links {
    flex-direction: column;
    gap: var(--space-sm);
  }
}

/* --- Page Headers --- */
.page-hero {
  padding: var(--space-3xl) 0;
  background: var(--color-gray-50);
  border-bottom: 1px solid var(--color-gray-200);
}

.page-hero h1 {
  margin-bottom: var(--space-md);
}

.page-hero p {
  margin: 0;
  max-width: 640px;
}

/* --- Forms --- */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gray-700);
  margin-bottom: var(--space-sm);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--space-md);
  font-size: 1rem;
  font-family: inherit;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--border-radius);
  background: var(--color-white);
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

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

/* --- Pricing Cards --- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  align-items: stretch;
}

.pricing-card {
  padding: var(--space-2xl);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--border-radius-lg);
  text-align: center;
  transition: all var(--transition);
}

.pricing-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
}

.pricing-card--featured {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.pricing-card__name {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.pricing-card__price {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.pricing-card__price-note {
  font-size: 0.875rem;
  color: var(--color-gray-500);
  margin-bottom: var(--space-xl);
}

.pricing-card__features {
  list-style: none;
  margin: 0 0 var(--space-xl);
  padding: 0;
  text-align: left;
}

.pricing-card__features li {
  padding: var(--space-sm) 0;
  font-size: 0.9375rem;
  color: var(--color-gray-600);
  border-bottom: 1px solid var(--color-gray-100);
}

.pricing-card__features li:last-child {
  border-bottom: none;
}

@media (max-width: 768px) {
  .pricing-grid {
    grid-template-columns: 1fr;
  }
}

/* --- Two Column Layout --- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

@media (max-width: 768px) {
  .two-col {
    grid-template-columns: 1fr;
  }
}

/* --- Image Placeholder --- */
.img-placeholder {
  background: var(--color-gray-100);
  border: 1px dashed var(--color-gray-300);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-500);
  font-size: 0.875rem;
  text-align: center;
  padding: var(--space-xl);
}

.img-placeholder--hero {
  aspect-ratio: 16/10;
  min-height: 300px;
}

.img-placeholder--screenshot {
  aspect-ratio: 16/10;
  min-height: 250px;
}

/* --- Utility --- */
.text-center { text-align: center; }
.mb-0 { margin-bottom: 0; }
.mt-xl { margin-top: var(--space-xl); }