:root {
  --font-main: 'Inter', system-ui, sans-serif;

  /* Light Mode */
  --bg-gradient-start: #f0f2f5;
  --bg-gradient-end: #e6e9ee;
  --card-bg: rgba(255, 255, 255, 0.6);
  --card-border: rgba(255, 255, 255, 0.9);
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --accent-color: #3b82f6;
  --accent-hover: #2563eb;
  --button-bg: #edf2f7;
  --button-shadow: 5px 5px 10px #d4d9e0, -5px -5px 10px #ffffff;
  --button-shadow-inset: inset 5px 5px 10px #d4d9e0, inset -5px -5px 10px #ffffff;
  --icon-color: #4a5568;
}

[data-theme='dark'] {
  --bg-gradient-start: #1a202c;
  --bg-gradient-end: #2d3748;
  --card-bg: rgba(45, 55, 72, 0.5);
  --card-border: rgba(255, 255, 255, 0.1);
  --text-primary: #edf2f7;
  --text-secondary: #a0aec0;
  --accent-color: #60a5fa;
  --accent-hover: #3b82f6;
  --button-bg: #2d3748;
  --button-shadow: 5px 5px 10px #1a202c, -5px -5px 10px #404c5c;
  --button-shadow-inset: inset 5px 5px 10px #1a202c, inset -5px -5px 10px #404c5c;
  --icon-color: #a0aec0;
}

html {
  scroll-behavior: smooth;
}

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

body {
  font-family: var(--font-main);
  color: var(--text-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

.background-gradient {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: linear-gradient(120deg, var(--bg-gradient-start), var(--bg-gradient-end));
  z-index: -1;
}

.app-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--card-border);
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
  text-decoration: none;
}

.nav-links {
  display: flex; /* Make visible on mobile */
  gap: 2rem;
}

.nav-links a {
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.theme-switcher {
  position: relative;
}

.theme-switcher input {
  display: none;
}

.theme-switcher label {
  cursor: pointer;
  color: var(--icon-color);
}

.sun-icon, .moon-icon {
  transition: opacity 0.3s ease, transform 0.4s ease;
}

.moon-icon {
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  transform: scale(0.8);
}

#theme-toggle:checked ~ label .sun-icon {
  opacity: 0;
  transform: scale(0.8) rotate(90deg);
}

#theme-toggle:checked ~ label .moon-icon {
  opacity: 1;
  transform: scale(1) rotate(0);
}

@media (max-width: 767px) { /* Use max-width for mobile styles */
    .app-nav {
        flex-direction: column;
        align-items: flex-start;
        padding: 1rem;
    }

    .nav-links {
        flex-direction: column;
        gap: 0.5rem;
        margin-top: 1rem;
    }

    .theme-switcher {
        margin-top: 1rem;
    }
}

main {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1rem;
  min-height: calc(100vh - 80px);
}

.app-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  width: 100%;
  max-width: 900px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 24px;
  padding: 1.5rem;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.1);
  margin-bottom: 2rem;
}

h1, h2 {
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

h1 {
    font-size: 1.75rem;
}

h2 {
  font-size: 1.25rem;
}

.preview-section h2 {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.content-section {
    width: 100%;
    max-width: 900px;
    margin-bottom: 4rem;
}

.content-section p, .content-section li {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1.1rem;
}

.content-section a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
}

.how-to-list {
    list-style: none;
    counter-reset: how-to-counter;
    padding-left: 0;
}

.how-to-list li {
    counter-increment: how-to-counter;
    margin-bottom: 1rem;
    display: flex;
    align-items: flex-start;
}

.how-to-list li::before {
    content: counter(how-to-counter);
    margin-right: 1rem;
    font-size: 1rem;
    font-weight: 700;
    background-color: var(--accent-color);
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    flex-shrink: 0;
}

.faq-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.faq-item {
    background: var(--button-bg);
    border-radius: 12px;
    box-shadow: var(--button-shadow);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
    background: transparent;
    border: none;
    cursor: pointer;
    text-align: left;
}

.faq-icon {
    transition: transform 0.3s ease;
    flex-shrink: 0;
    margin-left: 1rem;
}

.faq-question.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease-out, padding 0.5s ease-out;
    padding: 0 1.5rem;
}

.faq-answer p {
    padding-bottom: 1.5rem;
    font-size: 1rem;
}

.app-footer {
    width: 100%;
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.preview-card {
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: var(--button-bg);
  background-image: 
    linear-gradient(45deg, var(--bg-gradient-start) 25%, transparent 25%),
    linear-gradient(-45deg, var(--bg-gradient-start) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--bg-gradient-start) 75%),
    linear-gradient(-45deg, transparent 75%, var(--bg-gradient-start) 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
  border-radius: 16px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--button-shadow-inset);
}

#favicon-preview {
  width: 96px;
  height: 96px;
  image-rendering: pixelated;
}

.actions-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 2rem;
}

.action-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 1rem;
  border-radius: 12px;
  background: var(--button-bg);
  box-shadow: var(--button-shadow);
  border: none;
  cursor: pointer;
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  text-decoration: none;
  transition: all 0.2s ease-in-out;
}

.action-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  color: var(--accent-color);
}

.action-button:active {
  transform: translateY(0);
  box-shadow: var(--button-shadow-inset);
}

.action-button svg {
  width: 20px;
  height: 20px;
  color: var(--icon-color);
  transition: color 0.2s ease-in-out;
}

.action-button:hover svg {
  color: var(--accent-color);
}

.preview-controls {
    display: flex;
    flex-direction: column; /* Stack vertically on small screens */
    gap: 1rem;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.control-group {
    flex: 1;
}

.control-group h3 {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 28px;
}

.toggle-switch input { 
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--button-bg);
    box-shadow: var(--button-shadow-inset);
    border-radius: 28px;
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    border-radius: 50%;
    transition: .4s;
    box-shadow: 0 0 2px rgba(0,0,0,0.2);
}

input:checked + .slider {
    background-color: var(--accent-color);
}

input:checked + .slider:before {
    transform: translateX(22px);
}

input[type="color"] {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    width: 100%;
    height: 50px;
    background-color: transparent;
    border: none;
    cursor: pointer;
}
input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}
input[type="color"]::-webkit-color-swatch {
    border-radius: 12px;
    border: 1px solid var(--card-border);
    box-shadow: var(--button-shadow-inset);
}

.download-configurator {
    display: grid;
    gap: 1rem;
    padding: 1rem;
    background: var(--button-bg);
    border-radius: 16px;
    box-shadow: var(--button-shadow-inset);
    margin-bottom: 1rem;
}

.select-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.select-group label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.select-group select {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-color: var(--button-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 0.75rem;
    font-family: var(--font-main);
    font-size: 1rem;
    color: var(--text-primary);
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236B7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
}

.download-configurator .action-button {
    margin-top: 0.5rem;
}

.png-section {
  display: none; /* Hiding old png section */
}

.toast {
  position: fixed;
  bottom: -100px;
  left: 50%;
  transform: translateX(-50%);
  padding: 1rem 2rem;
  border-radius: 8px;
  background-color: var(--accent-color);
  color: #fff;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  transition: bottom 0.5s ease-in-out;
  z-index: 100;
}

.toast.show {
  bottom: 30px;
}

emoji-picker {
  width: 100%;
  --background: transparent;
  --border-color: rgba(0,0,0,0.1);
  --input-background: var(--button-bg);
  --input-font-color: var(--text-primary);
  --outline-color: var(--accent-color);
  --indicator-color: var(--accent-color);
  --category-font-color: var(--text-secondary);
}

[data-theme='dark'] emoji-picker.dark {
    --border-color: rgba(255,255,255,0.2);
    --input-background: var(--button-bg);
    --input-font-color: var(--text-primary);
    --category-font-color: var(--text-secondary);
}

@media (max-width: 767px) { /* Use max-width for mobile styles */
    .app-nav {
        flex-direction: column;
        align-items: flex-start;
        padding: 1rem;
    }

    .nav-links {
        flex-direction: column;
        gap: 0.5rem;
        margin-top: 1rem;
    }

    .theme-switcher {
        margin-top: 1rem;
    }
    main { padding: 0.5rem; }
    h1 { font-size: 1.5rem; }
    .app-container { padding: 1rem; }
}

@media (min-width: 768px) {
  .app-container {
    grid-template-columns: 350px 1fr;
  }
  .actions-grid {
    grid-template-columns: 1fr 1fr;
  }
  .nav-links {
    display: flex;
  }
}