/* ================================
   Portfolio Dark Mode Styles
   Cabinet Grotesk + Inter
   Web3 SaaS Product Designer
   ================================ */

/* ================================
   CSS Custom Properties (Variables)
   ================================ */
:root {
  /* Dark Mode Colors */
  --color-background: #0D0D0D;
  --color-surface: #1A1A1A;
  --color-surface-elevated: #242424;
  --color-text-primary: #F5F5F5;
  --color-text-secondary: #A3A3A3;
  --color-text-tertiary: #737373;
  --color-accent-teal: #00D4AA;
  --color-accent-teal-hover: #00BF9A;
  --color-accent-purple: #8B5CF6;
  --color-accent-purple-hover: #7C3AED;
  --color-border: #2A2A2A;
  --color-border-light: #333333;
  
  /* Typography */
  --font-heading: 'Cabinet Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  
  /* Font Sizes */
  --text-xs: 0.75rem;      /* 12px */
  --text-sm: 0.875rem;     /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg: 1.125rem;     /* 18px */
  --text-xl: 1.25rem;      /* 20px */
  --text-2xl: 1.5rem;      /* 24px */
  --text-3xl: 1.875rem;    /* 30px */
  --text-4xl: 2.25rem;     /* 36px */
  --text-5xl: 3rem;        /* 48px */
  --text-6xl: 3.75rem;     /* 60px */
  --text-7xl: 4.5rem;      /* 72px */
  
  /* Font Weights */
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --weight-extrabold: 800;
  
  /* Spacing */
  --space-xs: 0.25rem;     /* 4px */
  --space-sm: 0.5rem;      /* 8px */
  --space-md: 1rem;        /* 16px */
  --space-lg: 1.5rem;      /* 24px */
  --space-xl: 2rem;        /* 32px */
  --space-2xl: 3rem;       /* 48px */
  --space-3xl: 4rem;       /* 64px */
  --space-4xl: 6rem;       /* 96px */
  --space-5xl: 8rem;       /* 128px */
  
  /* Layout */
  --container-width: 1400px;
  --content-width: 900px;
  --border-radius: 8px;
  --border-radius-lg: 16px;
  --border-radius-xl: 24px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
  --shadow-glow-teal: 0 0 24px rgba(0, 212, 170, 0.3);
  --shadow-glow-purple: 0 0 24px rgba(139, 92, 246, 0.3);
}

/* ================================
   Font Imports
   ================================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* Cabinet Grotesk - You'll need to host this or use a service like fonts.com */
/* For now, using a fallback system font stack with similar characteristics */
/* Replace with actual Cabinet Grotesk @font-face if you have the files */
@font-face {
  font-family: 'Cabinet Grotesk';
  src: local('Cabinet Grotesk'), local('Helvetica Neue'), local('Arial');
  /* Add your Cabinet Grotesk font files here:
  src: url('/fonts/CabinetGrotesk-Regular.woff2') format('woff2'),
       url('/fonts/CabinetGrotesk-Regular.woff') format('woff');
  */
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Cabinet Grotesk';
  src: local('Cabinet Grotesk Medium'), local('Helvetica Neue Medium');
  /* src: url('/fonts/CabinetGrotesk-Medium.woff2') format('woff2'); */
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Cabinet Grotesk';
  src: local('Cabinet Grotesk Bold'), local('Helvetica Neue Bold');
  /* src: url('/fonts/CabinetGrotesk-Bold.woff2') format('woff2'); */
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-normal);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-background);
}

::selection {
  background-color: var(--color-accent-teal);
  color: var(--color-background);
}

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

/* Headings */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--weight-bold);
  line-height: 1.1;
  margin-bottom: var(--space-lg);
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

h1 {
  font-size: var(--text-6xl);
  font-weight: var(--weight-extrabold);
  letter-spacing: -0.03em;
}

h2 {
  font-size: var(--text-5xl);
  letter-spacing: -0.025em;
}

h3 {
  font-size: var(--text-4xl);
}

h4 {
  font-size: var(--text-3xl);
}

h5 {
  font-size: var(--text-2xl);
}

h6 {
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
}

/* Body Text */
p {
  margin-bottom: var(--space-lg);
  color: var(--color-text-primary);
  line-height: 1.7;
}

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

.text-tertiary {
  color: var(--color-text-tertiary);
}

.text-large {
  font-size: var(--text-lg);
  line-height: 1.8;
}

.text-small {
  font-size: var(--text-sm);
}

.text-xs {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.lead {
  font-size: var(--text-xl);
  line-height: 1.7;
  color: var(--color-text-secondary);
}

/* Links */
a {
  color: var(--color-accent-teal);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

a:focus-visible {
  outline: 2px solid var(--color-accent-teal);
  outline-offset: 4px;
  border-radius: 2px;
}

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

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

.container-narrow {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section {
  padding: var(--space-5xl) 0;
}

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

.section-md {
  padding: var(--space-3xl) 0;
}

/* ================================
   Grid System
   ================================ */

.grid {
  display: grid;
  gap: var(--space-2xl);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

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

.grid-auto-fit {
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

@media (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-auto-fit {
    grid-template-columns: 1fr;
  }
  
  .grid {
    gap: var(--space-xl);
  }
}

/* ================================
   Cards & Surfaces
   ================================ */

.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-2xl);
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--color-border-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card-interactive:hover {
  border-color: var(--color-accent-teal);
  box-shadow: var(--shadow-glow-teal);
}

.surface {
  background-color: var(--color-surface);
  border-radius: var(--border-radius);
  padding: var(--space-xl);
}

.surface-elevated {
  background-color: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--border-radius);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-teal-hover);
  color: var(--color-background);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-teal);
}

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

.btn-secondary:hover {
  background-color: var(--color-surface-elevated);
  border-color: var(--color-border-light);
  transform: translateY(-2px);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-accent-teal);
  border: 1px solid var(--color-accent-teal);
}

.btn-outline:hover {
  background-color: rgba(0, 212, 170, 0.1);
  box-shadow: var(--shadow-glow-teal);
}

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

.btn-ghost:hover {
  background-color: var(--color-surface);
  color: var(--color-text-primary);
}

.btn-lg {
  padding: var(--space-lg) var(--space-2xl);
  font-size: var(--text-lg);
}

/* ================================
   Navigation
   ================================ */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(13, 13, 13, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) 0;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

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

.nav-links {
  display: flex;
  gap: var(--space-2xl);
  list-style: none;
  align-items: center;
}

.nav-link {
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-accent-teal);
  border-radius: 2px;
}

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

.hero {
  padding: var(--space-5xl) 0;
  min-height: 90vh;
  display: flex;
  align-items: center;
}

.hero-content {
  max-width: 900px;
}

.hero-eyebrow {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-accent-teal);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-md);
  display: inline-block;
}

.hero-title {
  font-size: var(--text-7xl);
  font-weight: var(--weight-extrabold);
  line-height: 1;
  margin-bottom: var(--space-xl);
  background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-2xl);
  max-width: 700px;
}

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

/* ================================
   Project Cards
   ================================ */

.project-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
  cursor: pointer;
}

.project-card:hover {
  border-color: var(--color-border-light);
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.project-image-container {
  position: relative;
  width: 100%;
  height: 400px;
  background-color: var(--color-background);
  overflow: hidden;
}

.project-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-image {
  transform: scale(1.05);
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(13, 13, 13, 0.8) 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-content {
  padding: var(--space-2xl);
}

.project-category {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--color-accent-purple);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.project-title {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-md);
  color: var(--color-text-primary);
}

.project-description {
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
}

.project-tags {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  padding: var(--space-xs) var(--space-md);
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  transition: all var(--transition-fast);
}

.tag:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: var(--color-border-light);
  color: var(--color-text-primary);
}

/* ================================
   Section Headers
   ================================ */

.section-header {
  margin-bottom: var(--space-3xl);
  text-align: center;
}

.section-eyebrow {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-accent-teal);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-md);
}

.section-title {
  font-size: var(--text-5xl);
  margin-bottom: var(--space-md);
}

.section-description {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

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

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-4xl);
  align-items: center;
}

.about-image {
  width: 100%;
  border-radius: var(--border-radius-xl);
  border: 1px solid var(--color-border);
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.skill-item {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  padding: var(--space-sm) var(--space-lg);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  color: var(--color-text-primary);
}

@media (max-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
}

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

.footer {
  padding: var(--space-4xl) 0;
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-5xl);
}

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

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

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

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

.footer-link:hover {
  color: var(--color-accent-teal);
}

.social-links {
  display: flex;
  gap: var(--space-md);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.social-link:hover {
  background-color: var(--color-accent-teal);
  border-color: var(--color-accent-teal);
  color: var(--color-background);
  transform: translateY(-2px);
}

/* ================================
   Utility Classes
   ================================ */

/* Spacing */
.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }
.mt-3xl { margin-top: var(--space-3xl); }
.mt-4xl { margin-top: var(--space-4xl); }

.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }
.mb-3xl { margin-bottom: var(--space-3xl); }
.mb-4xl { margin-bottom: var(--space-4xl); }

/* Text Alignment */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* Font Weights */
.font-normal { font-weight: var(--weight-normal); }
.font-medium { font-weight: var(--weight-medium); }
.font-semibold { font-weight: var(--weight-semibold); }
.font-bold { font-weight: var(--weight-bold); }
.font-extrabold { font-weight: var(--weight-extrabold); }

/* Display */
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }
.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }

/* Flex Utilities */
.flex-row { flex-direction: row; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }
.gap-2xl { gap: var(--space-2xl); }

/* Accent Colors */
.accent-teal { color: var(--color-accent-teal); }
.accent-purple { color: var(--color-accent-purple); }
.bg-accent-teal { background-color: var(--color-accent-teal); }
.bg-accent-purple { background-color: var(--color-accent-purple); }

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

@media (max-width: 1200px) {
  :root {
    --text-7xl: 4rem;       /* 64px */
    --text-6xl: 3.5rem;     /* 56px */
    --text-5xl: 2.75rem;    /* 44px */
  }
}

@media (max-width: 768px) {
  :root {
    --text-7xl: 3rem;       /* 48px */
    --text-6xl: 2.5rem;     /* 40px */
    --text-5xl: 2rem;       /* 32px */
    --text-4xl: 1.75rem;    /* 28px */
    --text-3xl: 1.5rem;     /* 24px */
    
    --space-5xl: 6rem;      /* 96px */
    --space-4xl: 4rem;      /* 64px */
    --space-3xl: 3rem;      /* 48px */
  }
  
  .container,
  .container-narrow {
    padding: 0 var(--space-lg);
  }
  
  .section {
    padding: var(--space-4xl) 0;
  }
  
  .nav-links {
    gap: var(--space-md);
  }
  
  .hero {
    min-height: auto;
    padding: var(--space-4xl) 0;
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .hero-cta .btn {
    width: 100%;
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  :root {
    --text-7xl: 2.5rem;     /* 40px */
    --text-6xl: 2rem;       /* 32px */
  }
  
  .card,
  .project-content {
    padding: var(--space-lg);
  }
  
  .project-image-container {
    height: 300px;
  }
}

/* ================================
   Accessibility
   ================================ */

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

*:focus-visible {
  outline: 2px solid var(--color-accent-teal);
  outline-offset: 4px;
  border-radius: 4px;
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ================================
   Image & Media
   ================================ */

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

.img-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-contain {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* ================================
   Animations
   ================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes glow {
  0%, 100% {
    box-shadow: 0 0 20px rgba(0, 212, 170, 0.2);
  }
  50% {
    box-shadow: 0 0 30px rgba(0, 212, 170, 0.4);
  }
}

.fade-in {
  animation: fadeIn var(--transition-slow) ease-out;
}

.fade-in-up {
  animation: fadeInUp var(--transition-slow) ease-out;
}

.animate-glow {
  animation: glow 3s ease-in-out infinite;
}

/* ================================
   Gradient Accents
   ================================ */

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

.gradient-border {
  position: relative;
  border: 1px solid transparent;
  background-clip: padding-box;
}

.gradient-border::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, var(--color-accent-teal), var(--color-accent-purple));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}