/* ==========================================================================
   Vertex Point - Design System
   ========================================================================== */

/* CSS Variables */
:root {
  /* Colors - Sophisticated Black Theme */
  --color-bg: #000000;
  --color-surface: #0a0a0a;
  --color-surface-elevated: #111111;
  --color-border: #1a1a1a;
  --color-border-light: #2a2a2a;
  --color-primary: #ffffff;
  --color-primary-hover: #e5e5e5;
  --color-primary-muted: rgba(255, 255, 255, 0.05);
  --color-text: #ffffff;
  --color-text-secondary: #888888;
  --color-text-muted: #555555;
  --color-success: #22c55e;
  --color-error: #ef4444;
  --color-accent: #d4d4d4;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', Menlo, monospace;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout */
  --max-width: 1200px;
  --header-height: 72px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
}

/* ==========================================================================
   Reset & Base
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

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

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

ul, ol {
  list-style: none;
}

/* ==========================================================================
   Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }

p {
  color: var(--color-text-secondary);
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

section {
  padding: var(--space-20) 0;
}

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

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

.logo svg {
  width: 44px;
  height: 28px;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

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

.nav-cta {
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  color: #000000;
  transition: all var(--transition-fast);
}

.nav-cta:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
}

/* Mobile Menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 24px;
  height: 24px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition-fast);
}

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

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

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

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    padding: var(--space-6);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    gap: var(--space-4);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
  }

  .nav.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-link, .nav-cta {
    font-size: var(--text-base);
  }

  .nav-cta {
    width: 100%;
    text-align: center;
    padding: var(--space-3) var(--space-4);
  }
}

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

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

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 1000px;
  height: 1000px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.03) 0%, transparent 60%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  background: var(--color-text-secondary);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero h1 {
  margin-bottom: var(--space-6);
  letter-spacing: 0.05em;
}

.hero-tagline {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.hero-description {
  font-size: var(--text-lg);
  max-width: 600px;
  margin: 0 auto var(--space-8);
}

.hero-cta {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-sm);
  font-size: var(--text-base);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  letter-spacing: 0.02em;
}

.btn-primary {
  background: var(--color-primary);
  color: #000000;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 40px rgba(255, 255, 255, 0.1);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border-light);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.03);
  border-color: var(--color-text-secondary);
}

/* ==========================================================================
   About Section
   ========================================================================== */

.about {
  background: var(--color-surface);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-12);
}

.section-label {
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: var(--space-4);
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
}

.about-content p {
  font-size: var(--text-lg);
  margin-bottom: var(--space-6);
}

.about-content p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   Services Section
   ========================================================================== */

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.service-card {
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: var(--transition-base);
}

.service-card:hover {
  border-color: var(--color-border-light);
  transform: translateY(-4px);
  background: var(--color-surface-elevated);
}

.service-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-5);
}

.service-icon svg {
  width: 24px;
  height: 24px;
  color: var(--color-text);
}

.service-card h3 {
  margin-bottom: var(--space-3);
  font-size: var(--text-xl);
}

.service-card p {
  font-size: var(--text-base);
}

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

.contact {
  background: var(--color-surface);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
}

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

.contact-info h2 {
  margin-bottom: var(--space-4);
}

.contact-info > p {
  margin-bottom: var(--space-8);
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-lg);
  color: var(--color-text);
  transition: var(--transition-fast);
}

.contact-email:hover {
  border-color: var(--color-text-secondary);
  background: var(--color-surface);
}

.contact-email svg {
  width: 20px;
  height: 20px;
  color: var(--color-text);
}

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-group label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  color: var(--color-text);
  transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-text-secondary);
  background: var(--color-surface);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-muted);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

.form-submit {
  align-self: flex-start;
}

.form-status {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  display: none;
}

.form-status.success {
  display: block;
  background: rgba(34, 197, 94, 0.1);
  color: var(--color-success);
  border: 1px solid rgba(34, 197, 94, 0.2);
}

.form-status.error {
  display: block;
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

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

.footer {
  padding: var(--space-12) 0 var(--space-8);
  border-top: 1px solid var(--color-border);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-6);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-lg);
  font-weight: 600;
}

.footer-logo svg {
  width: 28px;
  height: 28px;
}

.footer-links {
  display: flex;
  gap: var(--space-6);
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-8);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-copyright {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.footer-location {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

@media (max-width: 768px) {
  .footer-content,
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

/* ==========================================================================
   Legal Pages
   ========================================================================== */

.legal-page {
  padding-top: calc(var(--header-height) + var(--space-12));
  padding-bottom: var(--space-20);
  min-height: 100vh;
}

.legal-content {
  max-width: 800px;
  margin: 0 auto;
}

.legal-content h1 {
  margin-bottom: var(--space-4);
}

.legal-meta {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-10);
}

.legal-content h2 {
  font-size: var(--text-2xl);
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
}

.legal-content h3 {
  font-size: var(--text-xl);
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}

.legal-content p {
  margin-bottom: var(--space-4);
}

.legal-content ul {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

.legal-content li {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  position: relative;
}

.legal-content li::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-4));
  top: 0.6em;
  width: 4px;
  height: 4px;
  background: var(--color-text-secondary);
  border-radius: 50%;
}

.legal-content a {
  color: var(--color-text);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}

.legal-content a:hover {
  color: var(--color-text-secondary);
}

/* ==========================================================================
   Utilities
   ========================================================================== */

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

/* ==========================================================================
   Responsive Adjustments
   ========================================================================== */

@media (max-width: 768px) {
  :root {
    --text-5xl: 2.25rem;
    --text-4xl: 1.875rem;
    --text-3xl: 1.5rem;
  }

  section {
    padding: var(--space-16) 0;
  }

  .hero {
    min-height: auto;
    padding-top: calc(var(--header-height) + var(--space-12));
    padding-bottom: var(--space-16);
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .hero-cta .btn {
    width: 100%;
    max-width: 280px;
  }
}