/* ============================================
   Vimerk Custom Styles
   Built on Pico.css framework
   ============================================ */

/* CSS Variables - Dark Theme with Gradient Accents */
:root {
  /* Color Palette */
  --vimerk-dark: #0f172a;
  --vimerk-darker: #020617;
  --vimerk-accent-start: #667eea;
  --vimerk-accent-end: #764ba2;
  --vimerk-text-primary: #f8fafc;
  --vimerk-text-secondary: #cbd5e1;
  --vimerk-text-muted: #94a3b8;
  --vimerk-border: #1e293b;

  /* Override Pico defaults for dark theme */
  --pico-background-color: var(--vimerk-dark);
  --pico-color: var(--vimerk-text-primary);
  --pico-h1-color: var(--vimerk-text-primary);
  --pico-h2-color: var(--vimerk-text-primary);
  --pico-h3-color: var(--vimerk-text-primary);
  --pico-muted-color: var(--vimerk-text-muted);
  --pico-primary: var(--vimerk-accent-start);
  --pico-primary-hover: var(--vimerk-accent-end);
  --pico-card-background-color: rgba(30, 41, 59, 0.5);
  --pico-card-border-color: var(--vimerk-border);
}

/* System Font Stack */
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji",
               "Segoe UI Emoji", "Segoe UI Symbol";
  background: linear-gradient(135deg, var(--vimerk-darker) 0%, var(--vimerk-dark) 100%);
  min-height: 100vh;
}

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--vimerk-accent-start);
  color: white;
  padding: 0.5rem 1rem;
  text-decoration: none;
  z-index: 100;
}

.skip-link:focus {
  top: 0;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--vimerk-border);
  padding: 0.75rem 0;
}

.site-header nav {
  padding: 0;
}

.site-header nav ul {
  margin: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--vimerk-text-primary);
  font-size: 1.25rem;
}

.brand img {
  filter: drop-shadow(0 0 8px rgba(102, 126, 234, 0.4));
}

.brand:hover {
  color: var(--vimerk-accent-start);
}

/* Language Dropdown */
.dropdown summary {
  cursor: pointer;
  list-style: none;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  background: transparent;
  border: 1px solid var(--vimerk-border);
  transition: all 0.2s ease;
}

.dropdown summary:hover {
  border-color: var(--vimerk-accent-start);
  background: rgba(102, 126, 234, 0.1);
}

.dropdown summary::after {
  content: " ▾";
  margin-left: 0.5rem;
}

.dropdown ul {
  margin-top: 0.5rem;
  min-width: 150px;
}

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

.hero {
  padding: 4rem 0 3rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  line-height: 1.3;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--vimerk-accent-start), var(--vimerk-accent-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero hgroup p {
  font-size: clamp(1rem, 3vw, 1.25rem);
  color: var(--vimerk-text-secondary);
  margin-top: 1rem;
}

.cta-group {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin: 2rem 0;
}

.cta-group a[role="button"] {
  min-width: 180px;
}

.minimal-presence-note {
  margin-top: 2rem;
  color: var(--vimerk-text-muted);
  font-size: 0.9rem;
}

/* ============================================
   Projects Section
   ============================================ */

#projects {
  padding: 4rem 0;
}

#projects hgroup {
  text-align: center;
  margin-bottom: 3rem;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.project-card {
  background: var(--pico-card-background-color);
  border: 1px solid var(--vimerk-border);
  border-radius: 0.5rem;
  padding: 1.5rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--vimerk-accent-start), var(--vimerk-accent-end));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--vimerk-accent-start);
  box-shadow: 0 8px 24px rgba(102, 126, 234, 0.15);
}

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

.project-card header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: 1rem;
  gap: 1rem;
}

.project-card h3 {
  margin: 0;
  font-size: 1.25rem;
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 1rem;
  background: rgba(102, 126, 234, 0.2);
  color: var(--vimerk-accent-start);
  border: 1px solid var(--vimerk-accent-start);
  white-space: nowrap;
}

.project-card p {
  color: var(--vimerk-text-secondary);
  margin: 0;
}

.project-card footer {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--vimerk-border);
}

.disclaimer {
  color: var(--vimerk-text-muted);
  font-style: italic;
  display: block;
}

/* ============================================
   Principles Section
   ============================================ */

#principles {
  padding: 4rem 0;
  background: rgba(2, 6, 23, 0.5);
  margin: 2rem 0;
  border-radius: 1rem;
}

#principles hgroup {
  text-align: center;
  margin-bottom: 3rem;
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.principles-grid article {
  text-align: center;
  padding: 1.5rem;
}

.principles-grid h3 {
  font-size: 1.125rem;
  margin-bottom: 0.75rem;
  color: var(--vimerk-accent-start);
}

.principles-grid p {
  color: var(--vimerk-text-secondary);
  font-size: 0.95rem;
  margin: 0;
}

/* ============================================
   Follow Updates Section
   ============================================ */

#updates {
  padding: 4rem 0;
  text-align: center;
}

#updates hgroup {
  margin-bottom: 2rem;
}

.updates-content {
  max-width: 600px;
  margin: 0 auto;
}

.updates-content p {
  color: var(--vimerk-text-secondary);
  margin-bottom: 1.5rem;
}

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

#contact {
  padding: 4rem 0;
}

#contact hgroup {
  text-align: center;
  margin-bottom: 3rem;
}

form {
  max-width: 700px;
  margin: 0 auto;
  background: rgba(30, 41, 59, 0.3);
  padding: 2rem;
  border-radius: 0.5rem;
  border: 1px solid var(--vimerk-border);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}

.hidden {
  display: none;
}

.required {
  color: var(--vimerk-accent-start);
}

input[type="text"],
input[type="email"],
select,
textarea {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--vimerk-border);
  color: var(--vimerk-text-primary);
  transition: border-color 0.2s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
select:focus,
textarea:focus {
  border-color: var(--vimerk-accent-start);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

button[type="submit"] {
  background: linear-gradient(135deg, var(--vimerk-accent-start), var(--vimerk-accent-end));
  border: none;
  font-weight: 600;
  transition: all 0.3s ease;
}

button[type="submit"]:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(102, 126, 234, 0.3);
}

.email-alternative {
  text-align: center;
  margin-top: 2rem;
  color: var(--vimerk-text-secondary);
}

.email-alternative a {
  color: var(--vimerk-accent-start);
  text-decoration: none;
}

.email-alternative a:hover {
  text-decoration: underline;
}

/* ============================================
   Thanks Page
   ============================================ */

.thanks-section {
  padding: 4rem 0;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.thanks-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.thanks-content hgroup {
  margin-bottom: 2rem;
}

.thanks-content h1 {
  background: linear-gradient(135deg, var(--vimerk-accent-start), var(--vimerk-accent-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.thanks-content p {
  color: var(--vimerk-text-secondary);
  margin-bottom: 2rem;
}

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

.site-footer {
  margin-top: 4rem;
  padding: 2rem 0;
  border-top: 1px solid var(--vimerk-border);
  text-align: center;
  color: var(--vimerk-text-muted);
}

.site-footer p {
  margin: 0.5rem 0;
}

.site-footer a {
  color: var(--vimerk-accent-start);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

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

@media (max-width: 768px) {
  .hero {
    padding: 2rem 0;
  }

  .cta-group {
    flex-direction: column;
  }

  .cta-group a[role="button"] {
    width: 100%;
  }

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

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

  form {
    padding: 1.5rem;
  }

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

/* ============================================
   Smooth Scrolling
   ============================================ */

html {
  scroll-behavior: smooth;
}

/* Scroll padding to account for sticky header */
:target {
  scroll-margin-top: 100px;
}

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

/* Focus visible styles */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--vimerk-accent-start);
  outline-offset: 2px;
}

/* Reduced motion for users who prefer it */
@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;
  }
}