/* FILE: css/global.css */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg);
  color: var(--text-primary);
  transition: background-color 0.4s ease, color 0.4s ease;
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

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

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

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

ul {
  list-style: none;
}

button {
  cursor: none;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
}

input, textarea {
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.content-hidden {
  visibility: hidden;
  opacity: 0;
}

.content-visible {
  visibility: visible;
  opacity: 1;
  transition: opacity 0.4s ease;
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background-color 0.4s ease, border-color 0.4s ease;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 64px;
}

.nav-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -1px;
  transition: color 0.3s ease;
}

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

.nav-links {
  display: flex;
  gap: 0.25rem;
}

.nav-links a {
  display: block;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-secondary);
  transition: all 0.3s ease;
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  background-color: var(--accent);
  background-color: rgba(37, 99, 235, 0.08);
}

[data-theme="tech"] .nav-links a:hover,
[data-theme="tech"] .nav-links a.active {
  background-color: rgba(0, 255, 255, 0.08);
  color: var(--primary-glow);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  cursor: none;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
}
.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.theme-toggle-group {
  display: flex;
  gap: 4px;
  background-color: var(--border);
  border-radius: 24px;
  padding: 3px;
}

.theme-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  font-size: 1rem;
  cursor: none;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 2px solid transparent;
}

.theme-btn:hover {
  background-color: var(--surface);
}

.theme-btn.active-theme {
  background-color: var(--surface);
  border-color: var(--accent);
  box-shadow: 0 0 12px rgba(37, 99, 235, 0.3);
}

[data-theme="tech"] .theme-btn.active-theme {
  border-color: var(--primary-glow);
  box-shadow: 0 0 18px rgba(0, 255, 255, 0.5);
}

.footer {
  text-align: center;
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--border);
  margin-top: 3rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: border-color 0.4s ease;
}

.footer-motto {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  color: var(--accent);
  margin-top: 0.25rem;
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  min-height: calc(100vh - 64px - 120px);
}

.section-title {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  text-align: center;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--accent);
  margin: 0.5rem auto 0;
  border-radius: 2px;
}

[data-theme="tech"] .section-title::after {
  background: var(--primary-glow);
  box-shadow: 0 0 12px var(--primary-glow);
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

#toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 12px 20px;
  border-radius: 12px;
  background-color: var(--surface);
  color: var(--text-primary);
  border: 1px solid var(--border);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: 0 8px 32px rgba(0,0,0,0.18);
  animation: toastIn 0.4s ease, toastOut 0.4s ease 2.6s forwards;
  max-width: 320px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes toastOut {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(20px); }
}

#particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  display: none;          /* hidden by default, shown only in tech theme */
  background: transparent;
  pointer-events: none;
}

[data-theme="tech"] #particle-canvas {
  display: block;
}