/*
Theme Name: AI Portfolio
Theme URI: https://example.com/ai-portfolio
Author: Mikolaj Duchlinski
Description: A custom minimalist, modern, and dark-themed portfolio for AI, Robotics, and control systems.
Version: 1.0
License: GNU General Public License v2 or later
Text Domain: ai-portfolio
*/

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:opsz,wght@9..40,400;9..40,500;9..40,600&family=Plus+Jakarta+Sans:wght@500;600;700;800&display=swap');

:root {
  --bg-color: #0d1117;
  /* Very dark slate blue/black */
  --surface-color: rgba(255, 255, 255, 0.03);
  /* Frosted glass base */
  --surface-border: rgba(255, 255, 255, 0.08);
  /* Delicate border */
  --surface-hover: rgba(255, 255, 255, 0.06);
  --accent-color: #c4b5fd;
  /* Soft violet/amethyst */
  --accent-hover: #a78bfa;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --font-sans: 'DM Sans', system-ui, -apple-system, sans-serif;
  --font-heading: 'Plus Jakarta Sans', system-ui, sans-serif;
  --font-mono: 'Fira Code', 'Courier New', monospace;
  --shadow-soft: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  --glass-blur: blur(16px);
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  /* Ethereal background gradient */
  background-image:
    radial-gradient(circle at 15% 50%, rgba(99, 102, 241, 0.12), transparent 45%),
    radial-gradient(circle at 85% 30%, rgba(236, 72, 153, 0.12), transparent 45%);
  background-attachment: fixed;
}

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

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

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.text-accent {
  color: var(--accent-color);
  background: -webkit-linear-gradient(45deg, #c4b5fd, #fbcfe8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header */
.site-header {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  padding: 2rem 0;
  background: transparent;
  border-bottom: none;
  z-index: 1000;
}

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

.site-title {
  font-size: 2.0rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.primary-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.primary-menu a {
  font-size: 2.0rem;
  font-weight: 800;
  letter-spacing: -0.3px;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  /* Offset header */
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-content h1 {
  font-size: 4.0rem;
  letter-spacing: -1.5px;
  margin-bottom: 1rem;
}

.hero-content .subtitle {
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 1.25rem;
  margin-bottom: 2rem;
}

.hero-content p {
  color: var(--text-muted);
  font-size: 1.25rem;
  margin-bottom: 2.5rem;
  max-width: 500px;
}

.btn {
  display: inline-block;
  padding: 0.875rem 1.75rem;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font-heading);
  letter-spacing: 0.5px;
  border-radius: 30px;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 1px solid var(--surface-border);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.btn-primary {
  background-color: rgba(196, 181, 253, 0.15);
  color: #fff;
  border-color: rgba(196, 181, 253, 0.3);
  box-shadow: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  background-color: rgba(196, 181, 253, 0.25);
  box-shadow: 0 10px 20px -10px rgba(196, 181, 253, 0.4);
}

.btn-outline {
  background-color: var(--surface-color);
  color: var(--text-main);
  box-shadow: none;
}

.btn-outline:hover {
  background-color: var(--surface-hover);
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text-main);
}

/* Code Snippet Box */
.code-window {
  background: var(--surface-color);
  border: 1px solid var(--surface-border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.code-header {
  background: var(--surface-border);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot.red {
  background: #ff5f56;
}

.dot.yellow {
  background: #ffbd2e;
}

.dot.green {
  background: #27c93f;
}

.code-content {
  padding: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.code-content .keyword {
  color: var(--accent-color);
}

.code-content .string {
  color: #a5d6ff;
}

/* Sections */
.section {
  padding: 6rem 0;
}

.section-title {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent-color);
  margin-bottom: 3rem;
  font-family: var(--font-mono);
}

/* Cards */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

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

.card {
  background: var(--surface-color);
  border: 1px solid var(--surface-border);
  border-radius: 16px;
  padding: 2rem;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-soft);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.card:hover {
  transform: translateY(-5px);
  background: var(--surface-hover);
  border-color: rgba(255, 255, 255, 0.2);
}

.card h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  font-weight: 600;
  color: var(--text-main);
}

.card p {
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.card-icon {
  font-size: 2rem;
  color: var(--accent-color);
  margin-bottom: 1.5rem;
}

/* Project Card */
.project-card {
  border: 1px solid var(--surface-border);
  border-radius: 16px;
  overflow: hidden;
  background: var(--surface-color);
  transition: all 0.3s ease;
  box-shadow: var(--shadow-soft);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.project-card:hover {
  transform: translateY(-5px);
  background: var(--surface-hover);
  border-color: rgba(255, 255, 255, 0.2);
}

.project-img {
  height: 200px;
  background: var(--surface-border);
  /* Placeholder for image */
  position: relative;
}

.project-img::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom, transparent, var(--surface-color));
}

.project-info {
  padding: 2rem;
}

.project-tags {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

.project-tag {
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  background: var(--surface-border);
  border-radius: 4px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* Footer */
.site-footer {
  padding: 4rem 0 2rem;
  border-top: 1px solid var(--surface-border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}

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

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

  .hero-content h1 {
    font-size: 3rem;
  }
}