/* Enhanced Preloader Styles */
.preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #0a0a0a;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity 0.5s ease;
}

.loader {
  position: relative;
  width: 150px;
  height: 150px;
}

.loader-inner {
  position: absolute;
  width: 100%;
  height: 100%;
  box-sizing: border-box;
}

.loader-line-wrap {
  position: absolute;
  width: 100%;
  height: 100%;
  overflow: hidden;
  box-sizing: border-box;
  animation: spin 2000ms cubic-bezier(0.175, 0.885, 0.32, 1.275) infinite;
}

.loader-line {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  box-sizing: border-box;
  border: 3px solid transparent;
  border-top-color: #1e90ff;
  animation: spin 2000ms cubic-bezier(0.175, 0.885, 0.32, 1.275) infinite;
}

.loader-line-wrap:nth-child(1) { animation-delay: -50ms; }
.loader-line-wrap:nth-child(2) { animation-delay: -100ms; }
.loader-line-wrap:nth-child(3) { animation-delay: -150ms; }
.loader-line-wrap:nth-child(4) { animation-delay: -200ms; }
.loader-line-wrap:nth-child(5) { animation-delay: -250ms; }

.loader-line-wrap:nth-child(1) .loader-line {
  width: 90%;
  height: 90%;
  top: 5%;
  left: 5%;
  border-top-color: #ff6b6b;
  animation-delay: -50ms;
}

.loader-line-wrap:nth-child(2) .loader-line {
  width: 80%;
  height: 80%;
  top: 10%;
  left: 10%;
  border-top-color: #4ecdc4;
  animation-delay: -100ms;
}

.loader-line-wrap:nth-child(3) .loader-line {
  width: 70%;
  height: 70%;
  top: 15%;
  left: 15%;
  border-top-color: #f7fff7;
  animation-delay: -150ms;
}

.loader-line-wrap:nth-child(4) .loader-line {
  width: 60%;
  height: 60%;
  top: 20%;
  left: 20%;
  border-top-color: #ffe66d;
  animation-delay: -200ms;
}

.loader-line-wrap:nth-child(5) .loader-line {
  width: 50%;
  height: 50%;
  top: 25%;
  left: 25%;
  border-top-color: #ff9f1c;
  animation-delay: -250ms;
}

.loader-text {
  position: absolute;
  width: 100%;
  text-align: center;
  top: 120%;
  color: #fff;
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  letter-spacing: 2px;
  text-transform: uppercase;
  animation: pulse 1.5s ease infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes pulse {
  0% { opacity: 0.5; }
  50% { opacity: 1; }
  100% { opacity: 0.5; }
}





:root {
  --color-bg: #ffffff;
  --color-text-primary: #111111;
  --color-text-muted: #6b7280;
  --color-card-bg: #f9f9f9;
  --color-shadow: rgba(0, 0, 0, 0.05);
  --color-primary: #000000;
  --color-primary-hover: #333333;
  --color-unlock-button-bg: #000000;
  --color-unlock-button-hover: #333333;
  --color-task-button-bg: #e5e7eb;
  --color-task-button-hover: #d1d5db;
  --color-red: #ef4444;
  --color-red-hover: #b91c1c;

  --border-radius: 0.75rem;
  --transition-speed: 0.3s;
  --max-width: 1200px;
  --spacing-vertical: 4rem;

  --overlay-bg: rgba(0, 0, 0, 0.5);
  --overlay-blur: 4px;

  --modal-bg: #ffffff;
  --modal-shadow: rgba(0, 0, 0, 0.2);

  --modal-width: 90vw;
  --modal-max-width: 720px;

  --btn-primary-bg: #000000;
  --btn-primary-hover-bg: #333333;
  --btn-secondary-bg: #e5e7eb;
  --btn-secondary-hover-bg: #d1d5db;
}

body.dark {
  /* Dark Mode Colors */
  --color-bg: #111111;
  --color-text-primary: #ffffff;
  --color-text-muted: #9ca3af;
  --color-card-bg: #272727;
  --color-shadow: rgba(172, 172, 172, 0.801);
  --color-primary: #ffffff;
  --color-primary-hover: #d1d5db;
  --color-unlock-button-bg: #d1d5db;
  --color-unlock-button-hover: #ffffff;
  --color-task-button-bg: #4a5568;
  --color-task-button-hover: #ffffff;
  --color-red: #f87171;
  --color-red-hover: #fca5a5;
  --overlay-bg: rgba(0, 0, 0, 0.8);
  --modal-bg: rgb(60, 60, 60);
  --modal-shadow: rgba(255, 255, 255, 0.2);
}

/* Reset and base */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text-muted);
  font-size: 18px;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-speed);
  display: block;
  height: 100%;
}

a:hover,
a:focus {
  color: #555555;
  outline: none;
}

.container {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
  width: 100%;
  flex: 1 0 auto;
}

/* Header and Navigation */
header {
  position: sticky;
  top: 0;
  background: var(--color-bg);
  border-bottom: 1px solid #ddd;
  z-index: 1000;
  box-shadow: 0 1px 5px var(--color-shadow);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
}

header .logo {
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  color: var(--color-primary);
  user-select: none;
}

nav {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

nav a {
  font-weight: 600;
  font-size: 1rem;
  padding: 0.25rem 0.5rem;
  border-radius: 0.375rem;
  transition: background-color var(--transition-speed), color var(--transition-speed);
}

nav a:hover,
nav a:focus {
  background-color: var(--color-primary);
  color: var(--color-bg);
  outline: none;
}

.nav-current {
  background-color: var(--color-primary);
  color: var(--color-bg);
  cursor: default;
  pointer-events: none;
}

.theme-toggle-btn {
  background: none;
  border: 2px solid var(--color-primary);
  border-radius: 0.5rem;
  padding: 0.25rem 0.75rem;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-primary);
  cursor: pointer;
  transition: background-color var(--transition-speed), color var(--transition-speed);
}

.theme-toggle-btn:hover,
.theme-toggle-btn:focus {
  background-color: var(--color-primary);
  color: var(--color-bg);
  outline: none;
}

/* Hero Section */
.hero {
  padding-top: var(--spacing-vertical);
  padding-bottom: var(--spacing-vertical);
  text-align: center;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  margin: 0 0 1rem;
  line-height: 1.1;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  user-select: none;
}

.hero p {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto 2rem;
  user-select: none;
}

/* Info grid with 4 cards per row */
.info-grid {
  padding-top: var(--spacing-vertical);
  padding-bottom: var(--spacing-vertical);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 2rem;
}

@media (max-width: 1024px) {
  .info-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .info-grid {
    grid-template-columns: 1fr;
  }
}

/* Info card styling */
.info-card {
  background-color: var(--color-card-bg);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 12px var(--color-shadow);
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
  cursor: pointer;
  position: relative;
}

.info-card:hover,
.info-card:focus-within {
  transform: translateY(-0.25rem);
  box-shadow: 0 8px 20px var(--color-shadow);
  outline: none;
}

.info-card h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--color-primary);
  user-select: none;
}

.info-card p {
  margin: 0;
  color: var(--color-text-muted);
  flex-grow: 1;
  user-select: text;
}

/* Modal overlay and fade animations */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay-bg);
  backdrop-filter: blur(var(--overlay-blur));
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 2000;
}

.modal-overlay.hidden {
  display: none;
}

.modal {
  background-color: var(--modal-bg);
  border-radius: var(--border-radius);
  box-shadow: 0 8px 24px var(--modal-shadow);
  width: var(--modal-width);
  max-width: var(--modal-max-width);
  max-height: 90vh;
  overflow-y: auto;
  padding: 2rem 2.5rem 3rem;
  position: relative;
  user-select: text;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  animation: fadeInUp 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes fadeInUp {
  0% {
    opacity: 0;
    transform: translateY(20px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Modal close button */
.modal-close-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background-color: var(--color-red);
  border: none;
  color: white;
  font-weight: bold;
  font-size: 1.25rem;
  line-height: 1;
  border-radius: 50%;
  width: 2.5rem;
  height: 2.5rem;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  user-select: none;
  transition: background-color 0.2s ease;
}

.modal-close-btn:hover,
.modal-close-btn:focus {
  background-color: var(--color-red-hover);
  outline: none;
}

/* Modal headings and content */
.modal h3 {
  margin: 0;
  font-weight: 800;
  font-size: 2rem;
  color: var(--color-primary);
  user-select: none;
}

.modal p {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  white-space: pre-wrap;
}

/* Unlock links and tasks styling */
.unlock-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
  user-select: none;
}

.task-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.task-button {
  background-color: var(--color-task-button-bg);
  border: none;
  color: var(--color-primary);
  padding: 0.75rem 1.25rem;
  font-weight: 600;
  font-size: 1rem;
  border-radius: 0.5rem;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.3s ease, color 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  justify-content: center;
}

.task-button:hover:not([aria-disabled="true"]),
.task-button:focus:not([aria-disabled="true"]) {
  background-color: var(--color-task-button-hover);
  outline: none;
}

.task-button[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
}

.task-button[aria-disabled="true"]:hover,
.task-button[aria-disabled="true"]:focus {
  background-color: var(--color-task-button-bg);
  outline: none;
}

.unlock-button {
  background-color: var(--color-unlock-button-bg);
  color: white;
}

.unlock-button:hover:not([aria-disabled="true"]),
.unlock-button:focus:not([aria-disabled="true"]) {
  background-color: var(--color-unlock-button-hover);
}

/* Modal code block styling */
.modal-code {
  background-color: #2d3748;
  color: #f7fafc;
  border-radius: 0.5rem;
  padding: 1rem;
  font-family: 'Fira Mono', monospace, monospace;
  font-size: 0.9rem;
  user-select: text;
  overflow-x: auto;
  max-height: 200px;
  margin-top: 0.5rem;
  white-space: pre-wrap;
  word-wrap: break-word;
}

/* Modal buttons container */
.modal-buttons {
  display: flex;
  gap: 1rem;
  margin-top: auto;
  justify-content: flex-end;
}

/* Buttons */
.btn-primary {
  background-color: var(--btn-primary-bg);
  border: none;
  color: white;
  padding: 0.6rem 1.25rem;
  font-weight: 700;
  font-size: 1rem;
  border-radius: 0.5rem;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.3s ease, transform 0.3s ease;
  display: flex;
  align-items: center;
}

.btn-primary svg.icon-copy {
  margin-right: 0.5rem;
}

.btn-primary:disabled {
  background-color: #777;
  cursor: not-allowed;
  transform: none;
}

.btn-primary:not(:disabled):hover,
.btn-primary:not(:disabled):focus {
  background-color: var(--btn-primary-hover-bg);
  transform: scale(1.05);
  outline: none;
}

.btn-secondary {
  background-color: var(--btn-secondary-bg);
  border: none;
  color: var(--color-primary);
  padding: 0.6rem 1.25rem;
  font-weight: 600;
  font-size: 1rem;
  border-radius: 0.5rem;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.3s ease;
}

.btn-secondary:disabled {
  background-color: #ccc;
  cursor: not-allowed;
}

.btn-secondary:not(:disabled):hover,
.btn-secondary:not(:disabled):focus {
  background-color: var(--btn-secondary-hover-bg);
  outline: none;
}

/* Copy confirmation */
.copy-confirmation {
  color: #48bb78;
  font-weight: 600;
  font-size: 0.9rem;
  user-select: none;
  opacity: 0;
  transition: opacity 0.3s ease;
  margin-top: 0.5rem;
}

.copy-confirmation[aria-hidden="false"] {
  opacity: 1;
}

/* Unlocked container and boxes */
.unlocked-container {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.5rem;
}

@media (max-width: 1024px) {
  .unlocked-container {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 639px) {
  .unlocked-container {
    grid-template-columns: 1fr;
  }
}

.unlocked-box {
  background-color: var(--color-card-bg);
  box-shadow: 0 4px 12px var(--color-shadow);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: center;
  font-weight: 600;
  font-size: 1.3rem;
  color: var(--color-primary);
  cursor: pointer;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
  user-select: none;
  outline: none;
}

.unlocked-box:hover,
.unlocked-box:focus {
  box-shadow: 0 8px 24px var(--color-shadow);
  transform: translateY(-3px);
}
.nav-container {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  flex-grow: 1;
}

.nav-search {
  position: relative;
  max-width: 300px;
  flex-shrink: 0;
}

.nav-search-input {
  width: 100%;
  padding: 0.4rem 0.75rem;
  font-size: 1rem;
  font-weight: 500;
  border: 1px solid #d1d5db; /* light gray border */
  border-radius: 0.75rem;
  background-color: #f9fafb; /* subtle light background */
  color: #111827;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.nav-search-input::placeholder {
  color: #9ca3af;
}

.nav-search-input:focus {
  border-color: #000000;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.1);
  outline: none;
}

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

.card-image {
  width: 100%;
  border-radius: 0.75rem 0.75rem 0.75rem 0.75rem ; /* rounded top corners matching card */
  object-fit: cover;
  box-shadow: black ;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  display: block;
  user-select: none;
  pointer-events: none; /* image shouldn't interfere with clicking card */
}

.info-card:hover .card-image,
.info-card:focus-within .card-image {
  transform: scale(1.05); /* gentle zoom on hover/focus */
}
.tags {
  margin-top: 0.25rem;
  margin-bottom: 0.75rem;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.15rem 0.6rem;
  border-radius: 9999px; /* pill shape */
  text-transform: uppercase;
  user-select: none;
  letter-spacing: 0.03em;
  cursor: default;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.tag-icon {
  width: 1em;
  height: 1em;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  display: inline-block;
  color: currentColor;
}

/* Colors reflecting tag meaning */
.tag.free {
  background-color: #10b981; /* emerald green */
  color: white;
}

.tag.paid {
  background-color: #3b82f6; /* blue */
  color: white;
}

.tag.premium {
  background-color: #ef4444; /* red */
  color: white;
}

.tag.key {
  background-color: #f59e0b; /* Amber/Gold for "Key" */
  color: white;
}
.custom-box {
  background-color: var(--color-card-bg);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 12px var(--color-shadow);
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
  cursor: pointer;
  position: relative;
  text-align: center;
  user-select: none;
}

.custom-box:hover,
.custom-box:focus {
  transform: translateY(-0.25rem);
  box-shadow: 0 8px 20px var(--color-shadow);
  outline: none;
}


.custom-box h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--color-primary);
  user-select: none;
}

.custom-box p {
  margin: 0;
  color: var(--color-text-muted);
  flex-grow: 1;
  user-select: text;
}