/* ==========================================================================
   DDG — The Data Design Group
   Main Stylesheet | ddg.mx
   ========================================================================== */

/* --- Custom Properties --- */
:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f9fafb;
  --color-bg-card: #ffffff;
  --color-text: #111827;
  --color-text-secondary: #6b7280;
  --color-text-tertiary: #9ca3af;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-accent-light: #eff6ff;
  --color-border: #e5e7eb;
  --color-border-light: #f3f4f6;
  --color-active: #059669;
  --color-active-bg: #ecfdf5;
  --color-dev: #d97706;
  --color-dev-bg: #fffbeb;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  --container: 1120px;
  --nav-height: 64px;
  --radius: 8px;
  --radius-sm: 4px;
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Top accent line */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #2563eb, #7c3aed);
  z-index: 1001;
}

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

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

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

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

h1 { font-size: clamp(2.25rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }

.mono {
  font-family: var(--font-mono);
}

/* --- Layout --- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 96px 0;
  scroll-margin-top: var(--nav-height);
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 3px;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 999;
  transition: background var(--transition), box-shadow var(--transition);
}

.nav.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--color-border);
}

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

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.nav-logo:hover {
  color: var(--color-accent);
}

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

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition);
}

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--color-text);
}

.nav-toggle svg {
  display: block;
}

/* Mobile nav */
.nav-mobile {
  display: none;
  position: fixed;
  top: calc(var(--nav-height) + 3px);
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 24px 24px;
  z-index: 998;
}

.nav-mobile.open {
  display: block;
}

.nav-mobile a {
  display: block;
  padding: 12px 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border-light);
}

.nav-mobile a:last-child {
  border-bottom: none;
}

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

/* --- Hero --- */
.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--nav-height) + 48px);
  padding-bottom: 48px;
  background-image: radial-gradient(circle, var(--color-border) 1px, transparent 1px);
  background-size: 32px 32px;
}

.hero-content {
  max-width: 720px;
}

.hero-label {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-accent);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.hero h1 {
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.25rem);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 32px;
  max-width: 560px;
}

.hero-founder {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  max-width: 560px;
}

.hero-founder strong {
  color: var(--color-text);
  font-weight: 600;
}

.hero-founder a {
  font-weight: 500;
}

.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  margin-top: 24px;
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
}

.hero-proof span {
  position: relative;
}

.hero-proof span:not(:last-child)::after {
  content: '\00b7';
  position: absolute;
  right: -13px;
  color: var(--color-border);
}

.hero-scroll {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 48px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-tertiary);
  transition: color var(--transition);
}

.hero-scroll:hover {
  color: var(--color-accent);
}

.hero-scroll svg {
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(4px); }
}

/* --- Section Headers --- */
.section-header {
  margin-bottom: 48px;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

/* --- Principles --- */
.principles {
  padding: 64px 0;
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.principle h3 {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text);
}

.principle p {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

/* --- Portfolio --- */
.portfolio {
  background: var(--color-bg);
}

.portfolio-group {
  margin-bottom: 48px;
}

.portfolio-group:last-child {
  margin-bottom: 0;
}

.portfolio-group-title {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.product-card {
  display: flex;
  flex-direction: column;
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-card);
  color: var(--color-text);
  transition: border-color var(--transition), transform var(--transition);
}

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

.product-logo {
  display: block;
  max-width: 160px;
  max-height: 80px;
  width: auto;
  height: auto;
  object-fit: contain;
  margin: 0 auto 20px;
}

.product-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  gap: 12px;
}

.product-card-header h4 {
  font-size: 1.125rem;
  font-weight: 600;
}

.badge {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 99px;
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.badge-active {
  background: var(--color-active-bg);
  color: var(--color-active);
}

.badge-dev {
  background: var(--color-dev-bg);
  color: var(--color-dev);
}

.product-card p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-bottom: 16px;
  flex: 1;
}

.product-domain {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.product-domain svg {
  opacity: 0;
  transition: opacity var(--transition), transform var(--transition);
}

.product-card:hover .product-domain svg {
  opacity: 1;
  transform: translateX(2px);
}

/* --- Now --- */
.now {
  background: var(--color-bg-alt);
}

.now-card {
  max-width: 640px;
  padding: 32px;
  border-left: 3px solid var(--color-accent);
  background: var(--color-bg);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.now-card p {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.now-card strong {
  color: var(--color-text);
  font-weight: 600;
}

.now-card a {
  font-weight: 500;
}

/* --- About --- */
.about {
  background: var(--color-bg);
}

.about-content {
  max-width: 640px;
}

.about-content p {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.about-content p:last-of-type {
  margin-bottom: 32px;
}

.about-content strong {
  color: var(--color-text);
  font-weight: 600;
}

.about-trust {
  margin-bottom: 32px;
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-alt);
}

.about-trust h3 {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

.about-trust ul {
  list-style: none;
}

.about-trust li {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  padding-left: 20px;
  position: relative;
  margin-bottom: 6px;
}

.about-trust li:last-child {
  margin-bottom: 0;
}

.about-trust li::before {
  content: '\2014';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 600;
}

.social-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: border-color var(--transition), color var(--transition);
}

.social-link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.social-link svg {
  flex-shrink: 0;
}

/* --- Experience Grid (inside About) --- */
.experience-block {
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid var(--color-border-light);
}

.experience-header {
  text-align: center;
  margin-bottom: 32px;
}

.experience-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}

.experience-subtitle {
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
  letter-spacing: 0.04em;
}

.experience-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0;
}

.experience-name {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text-tertiary);
  padding: 10px 20px;
  white-space: nowrap;
  transition: color var(--transition);
}

.experience-name:hover {
  color: var(--color-text);
}

/* --- Contact --- */
.contact {
  background: var(--color-bg-alt);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}

.contact-card {
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-card);
  color: var(--color-text);
  transition: border-color var(--transition);
}

.contact-card:hover {
  border-color: var(--color-accent);
  color: var(--color-text);
}

.contact-card h4 {
  margin-bottom: 8px;
  font-size: 1rem;
}

.contact-card p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-bottom: 12px;
}

.contact-card .contact-email {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-accent);
}

.contact-direct {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

.contact-direct a {
  font-weight: 500;
}

/* --- Footer --- */
.footer {
  padding: 48px 0;
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-left {
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
}

.footer-attribution {
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
}

.footer-attribution a {
  color: var(--color-text-secondary);
  font-weight: 500;
}

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

/* --- Responsive --- */
@media (max-width: 768px) {
  section {
    padding: 64px 0;
  }

  .hero {
    min-height: 75vh;
    padding-top: calc(var(--nav-height) + 32px);
  }

  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .principles-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .product-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero {
    min-height: 70vh;
  }

  h1 {
    font-size: 2rem;
  }

  .social-links {
    flex-direction: column;
  }

  .social-link {
    justify-content: center;
  }
}