/* =========================
   CSS VARIABLES & BASE
========================= */
:root {
  /* Colors */
  --bg-primary: #121212;
  --bg-secondary: #1f1f1f;
  --bg-card: #2a2a2a;
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --accent-primary: #007bff;
  --accent-hover: #0056b3;
  --accent-secondary: #00d9ff;

  /* Typography */
  --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;

  /* Spacing scale */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;

  /* Layout */
  --border-radius: 8px;
  --transition-speed: 0.3s;
  --header-height: 120px;
  --max-width-content: 1200px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-primary);
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

/* ========================================
   PERFECT ACCESSIBILITY FOCUS STYLES
   ======================================== */

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--accent-primary);
  color: var(--text-primary);
  padding: var(--spacing-xs) var(--spacing-sm);
  text-decoration: none;
  border-radius: 0 0 var(--border-radius) 0;
  z-index: 9999;
}

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

/* UNIVERSAL BLUE FOCUS GLOW - Applies to EVERYTHING */
*:focus-visible {
  outline: 2px solid var(--accent-secondary) !important;
  outline-offset: 2px !important;
  box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.2) !important;
}

/* Project cards get slightly thicker glow */
.project-card:focus-visible {
  outline: 3px solid var(--accent-secondary) !important;
  outline-offset: 3px !important;
  box-shadow: 0 0 0 4px rgba(0, 217, 255, 0.3) !important;
}

/* Modal close button - NO background change, just blue outline */
.modal-close:focus-visible {
  background-color: transparent !important;
  outline: 2px solid var(--accent-secondary) !important;
  outline-offset: 2px !important;
  box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.2) !important;
}

/* =========================
   HEADER & NAVIGATION
========================= */

header {
  background-color: var(--bg-secondary);
  padding: var(--spacing-sm) 0;
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

.header-container {
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

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

header h1 {
  margin: 0 0 var(--spacing-xs);
  text-align: left;
}

.tagline {
  margin: 0 0 var(--spacing-sm);
  text-align: center;
  color: var(--text-secondary);
}

nav .nav-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

nav ul li a {
  color: var(--text-primary);
  text-decoration: none;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  transition: background-color var(--transition-speed), color var(--transition-speed);
}

nav ul li a:hover,
nav ul li a:focus {
  background-color: var(--accent-primary);
}

nav ul li a[aria-current="page"] {
  background-color: var(--bg-card);
  border-bottom: 2px solid var(--accent-secondary);
}

.nav-toggle {
  display: none;
  background-color: var(--bg-card);
  border: 1px solid #444;
  color: var(--text-primary);
  padding: 0.35rem 0.75rem;
  border-radius: var(--border-radius);
  font-size: 1.1rem;
  cursor: pointer;
  box-shadow: 0 2px 4px rgba(0,0,0,0.4);
}

.nav-toggle:hover,
.nav-toggle:focus {
  background-color: var(--accent-primary);
}

/* =========================
   MAIN LAYOUT
========================= */

main {
  padding-top: calc(var(--header-height) + var(--spacing-lg));
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding-left: var(--spacing-sm);
  padding-right: var(--spacing-sm);
}

section {
  margin-bottom: var(--spacing-xl);
}

section h2 {
  border-bottom: 2px solid var(--accent-primary);
  padding-bottom: var(--spacing-xs);
}

/* =========================
   ABOUT & CARD BLOCKS
========================= */

.about-content {
  background-color: var(--bg-card);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
}

.skills-highlight {
  background-color: var(--bg-secondary);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  margin: var(--spacing-md) 0;
}

.skills-highlight h3 {
  margin-top: 0;
  color: var(--accent-secondary);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(260px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(260px, 1fr));
  gap: var(--spacing-lg);
}

.project-actions {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.project-actions form {
  margin: 0;
}

.feature-card,
.project-card {
  background-color: var(--bg-card);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.project-card {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  min-height: 260px;
  cursor: pointer;
  position: relative;
}

.feature-card:hover,
.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0, 217, 255, 0.2);
}

/* =========================
   BUTTONS
========================= */

.cta-button,
button[type="submit"],
.btn {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background-color: var(--accent-primary);
  color: var(--text-primary);
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  text-decoration: none;
  font-weight: 600;
  transition: background-color var(--transition-speed), transform var(--transition-speed);
  text-align: center;
}

.cta-button:hover,
button[type="submit"]:hover,
.btn:hover,
.cta-button:focus,
button[type="submit"]:focus,
.btn:focus {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
}

/* =========================
   PROJECT LINK BUTTONS
========================= */

.project-links {
  margin-top: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
}

.project-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: var(--accent-primary);
  color: var(--text-primary);
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  transition: all var(--transition-speed);
  box-shadow: 0 2px 4px rgba(0, 123, 255, 0.3);
  white-space: nowrap;
}

.project-link:hover,
.project-link:focus {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0, 123, 255, 0.4);
  outline: none;
}

.project-links strong {
  color: var(--text-primary);
  font-weight: 600;
  margin-right: 0.5rem;
}

/* =========================
   FORMS
========================= */

form {
  background-color: var(--bg-card);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  max-width: 600px;
  margin: var(--spacing-lg) auto;
}

form label {
  display: block;
  margin-bottom: var(--spacing-xs);
}

form input[type="text"],
form input[type="email"],
form input[type="password"],
form input[type="tel"],
form textarea,
form select {
  width: 100%;
  padding: var(--spacing-sm);
  border: 1px solid #444;
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-md);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  font-family: var(--font-primary);
}

form textarea {
  min-height: 120px;
}

.form-response,
.form-error {
  max-width: 600px;
  margin: 1rem auto;
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
}

.form-response {
  background-color: #00c851;
}

.form-error {
  background-color: #ff4444;
}

/* =========================
   SOCIAL LINKS & EMBEDS
========================= */

.socials-list {
  list-style: none;
  padding: 0;
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  justify-content: center;
}

.socials-list a {
  background-color: var(--bg-card);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius);
  text-decoration: none;
  color: var(--text-primary);
}

.socials-list a:hover,
.socials-list a:focus {
  background-color: var(--accent-primary);
}

.embed-container {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  max-width: 100%;
  border-radius: var(--border-radius);
}

.embed-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* =========================
   FOOTER
========================= */

footer {
  background-color: var(--bg-secondary);
  text-align: center;
  padding: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

/* =========================
   UTILITIES
========================= */

.text-center {
  text-align: center;
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

/* =========================
   BULLETPROOF PROJECT MODAL
========================= */

.project-card:hover .click-hint,
.project-card:focus-visible .click-hint {
  opacity: 1;
}

.click-hint {
  font-size: 0.85rem;
  color: var(--accent-secondary);
  margin-top: auto;
  padding-top: var(--spacing-sm);
  opacity: 0.6;
  transition: opacity var(--transition-speed);
  text-align: center;
}

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.90);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.modal-overlay.show {
  display: flex;
  opacity: 1;
}

.modal-container {
  position: relative;
  background-color: var(--bg-card);
  border: 1px solid #444;
  border-radius: var(--border-radius);
  max-width: 700px;
  width: 90%;
  max-height: 85vh;
  overflow-y: auto;
  padding: var(--spacing-lg);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.85);
  transform: scale(0.9) translateY(-20px);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.show .modal-container {
  transform: scale(1) translateY(0);
}

.modal-close-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: var(--text-primary);
  font-size: 2rem;
  font-weight: 300;
  line-height: 1;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  z-index: 3000;
  padding: 0;
}

.modal-close-btn:hover {
  background-color: var(--accent-primary);
  border-color: var(--accent-secondary);
  transform: rotate(90deg) scale(1.1);
  box-shadow: 0 4px 12px rgba(0, 123, 255, 0.5);
}

.modal-close-btn:focus-visible {
  outline: 2px solid var(--accent-secondary);
  outline-offset: 2px;
}

.modal-header {
  margin-bottom: var(--spacing-lg);
  padding-right: 3rem;
}

.modal-header h2 {
  margin: 0 0 var(--spacing-xs);
  border-bottom: none;
  padding-bottom: 0;
  color: var(--text-primary);
}

.modal-header .project-status {
  display: inline-block;
  font-size: 0.85rem;
}

.modal-body {
  color: var(--text-secondary);
  line-height: 1.6;
}

.modal-section {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-md);
  border-top: 1px solid #444;
}

.modal-section h3 {
  margin: 0 0 var(--spacing-sm);
  color: var(--accent-secondary);
  font-size: 1.1rem;
}

#modal-description {
  font-size: 1rem;
  white-space: pre-wrap;
  color: var(--text-primary);
}

#modal-tools {
  margin: 0;
}

.modal-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.modal-link-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xs) var(--spacing-md);
  background-color: var(--accent-primary);
  color: var(--text-primary);
  border: none;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition-speed);
  box-shadow: 0 2px 4px rgba(0, 123, 255, 0.3);
}

.modal-link-btn:hover,
.modal-link-btn:focus-visible {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 123, 255, 0.4);
}

/* =========================
   PROJECT FILTERS
========================= */

.project-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin: var(--spacing-lg) 0;
  justify-content: center;
}

.filter-btn {
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 2px solid #444;
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-speed);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.filter-btn:hover {
  border-color: var(--accent-secondary);
  color: var(--text-primary);
  transform: translateY(-2px);
}

.filter-btn.active {
  background: var(--accent-primary);
  border-color: var(--accent-secondary);
  color: var(--text-primary);
  box-shadow: 0 4px 12px rgba(0, 123, 255, 0.4);
}

.filter-count {
  background: rgba(255, 255, 255, 0.2);
  padding: 0.1rem 0.5rem;
  border-radius: 12px;
  font-size: 0.85rem;
  font-weight: bold;
}

.filter-btn.active .filter-count {
  background: rgba(255, 255, 255, 0.3);
}

.project-card.hidden {
  display: none;
}

.project-card.fade-in {
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* =========================
   TOOLS DROPDOWN (PUBLIC)
========================= */

.tools-dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-toggle {
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 2px solid #444;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  transition: all var(--transition-speed);
}

.dropdown-toggle:hover {
  border-color: var(--accent-secondary);
  color: var(--text-primary);
}

.dropdown-content {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 5px;
  background: var(--bg-card);
  min-width: 300px;
  max-height: 400px;
  overflow-y: auto;
  border: 2px solid var(--accent-primary);
  border-radius: var(--border-radius);
  z-index: 10000;
  box-shadow: 0 8px 32px rgba(0,0,0,0.8);
  padding: var(--spacing-sm);
}

.dropdown-content.show {
  display: block !important;
}

.tool-filters-container {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 320px;
  overflow-y: auto;
}

.tool-checkbox-label {
  display: flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  cursor: pointer;
  transition: background var(--transition-speed);
  border-radius: var(--border-radius);
  color: var(--text-primary);
}

.tool-checkbox-label:hover {
  background: var(--bg-secondary);
}

.tool-checkbox-label input[type="checkbox"] {
  margin-right: var(--spacing-xs);
  cursor: pointer;
  width: 18px;
  height: 18px;
}

.tool-checkbox-label span {
  user-select: none;
  font-size: 0.95rem;
}

/* Hide "Add Tool" section on public page */
.project-filters .dropdown-other {
  display: none;
}

/* =========================
   ADMIN TOOLS SELECTOR
========================= */

.tools-selector {
  margin-bottom: var(--spacing-md);
}

.tools-dropdown-admin {
  position: relative;
  display: inline-block;
  width: 100%;
}

.tools-dropdown-admin .dropdown-toggle {
  width: 100%;
  padding: var(--spacing-sm);
  background: var(--bg-card);
  border: 1px solid #444;
  border-radius: var(--border-radius);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.tools-dropdown-admin .dropdown-content {
  display: none;
  position: absolute;
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid #444;
  border-radius: var(--border-radius);
  z-index: 1000;
  box-shadow: 0 8px 16px rgba(0,0,0,0.3);
  margin-top: 0.25rem;
}

.tools-dropdown-admin .dropdown-content.show {
  display: block;
}

#admin-tools-list {
  max-height: 200px;
  overflow-y: auto;
  padding: var(--spacing-sm);
}

.tool-checkbox {
  display: flex;
  align-items: center;
  padding: 0.5rem;
  cursor: pointer;
  transition: background var(--transition-speed);
}

.tool-checkbox:hover {
  background: var(--bg-card);
}

.tool-checkbox input {
  margin-right: 0.5rem;
  cursor: pointer;
}

.tool-checkbox label {
  cursor: pointer;
  margin: 0;
}

.dropdown-other {
  padding: var(--spacing-sm);
  border-top: 1px solid #444;
  background: var(--bg-card);
  display: flex;
  gap: 0.5rem;
}

#new-tool-input,
#new-tool-admin {
  flex: 1;
  padding: 0.5rem;
  margin-bottom: 0.5rem;
  border: 1px solid #444;
  border-radius: var(--border-radius);
  background: var(--bg-secondary);
  color: var(--text-primary);
}

#new-tool-input:focus,
#new-tool-admin:focus {
  outline: 2px solid var(--accent-secondary);
}

#add-tool-admin {
  padding: 0.5rem var(--spacing-md);
  background: var(--accent-primary);
  border: none;
  border-radius: var(--border-radius);
  color: white;
  cursor: pointer;
  transition: background var(--transition-speed);
}

#add-tool-admin:hover {
  background: var(--accent-hover);
}

/* =========================
   RESPONSIVE (TABLET/MOBILE)
========================= */

@media (max-width: 768px) {
  :root {
    --header-height: 150px;
  }

  nav .nav-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background-color: var(--bg-secondary);
    width: 100%;
    padding: 0;
    margin-top: var(--spacing-sm);
    display: none;
  }

  nav .nav-links li {
    width: 100%;
  }

  nav .nav-links li a {
    display: block;
    width: 100%;
    padding: 0.75rem var(--spacing-sm);
  }

  .nav-toggle {
    display: inline-block;
  }

  nav .nav-links.nav-open {
    display: flex;
  }

  header {
    position: static;
  }

  main {
    padding-top: var(--spacing-lg);
  }

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

  .project-filters {
    flex-direction: column;
  }

  .filter-btn {
    width: 100%;
    justify-content: space-between;
  }

  .modal-container {
    width: 95%;
    max-height: 90vh;
    padding: var(--spacing-md);
  }

  .modal-header {
    padding-right: 2.5rem;
  }

  .modal-close-btn {
    top: 0.5rem;
    right: 0.5rem;
    width: 2.2rem;
    height: 2.2rem;
    font-size: 1.8rem;
  }
}

/* No results message */
.no-results-message {
  background: var(--bg-secondary);
  border: 2px dashed var(--accent-primary);
  border-radius: var(--border-radius);
  padding: var(--spacing-xl);
  text-align: center;
}

.no-results-message p {
  margin: 0;
  font-size: 1.2rem;
  color: var(--text-secondary);
  font-style: italic;
}