:root {
    --bg-light: #f8f9fa;
    --bg-card: #ffffff;
    --text-main: #212529;
    --text-muted: #6c757d;
    --accent: #0066ff;
    --accent-hover: #0052cc;
    --accent-soft: rgba(0, 102, 255, 0.05);
    --border: #e9ecef;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
    --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

body {
    background-color: var(--bg-light);
    color: var(--text-main);
    font-family: var(--font-ui);
    -webkit-font-smoothing: antialiased; 
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100%;
}

header {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    z-index: 10;
}

.brand h1 {
    font-size: 1.1rem;
    font-weight: 800;
    letter-spacing: -0.5px; 
    color: var(--accent);
}

.version {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
    background: var(--bg-light);
    padding: 2px 8px;
    border-radius: 12px;
    margin-left: 8px;
}

.subtitle {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
}

/* Workspace */
.workspace {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.sidebar {
    width: 320px;
    background-color: var(--bg-card);
    border-right: 1px solid var(--border);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 28px;
    overflow-y: auto;
}

.control-group label {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-main);
    text-transform: uppercase;
    margin-bottom: 10px;
    letter-spacing: 0.5px;
}

input[type="text"], select {
    width: 100%;
    background-color: var(--bg-light);
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 12px;
    font-family: var(--font-ui);
    font-size: 0.95rem;
    border-radius: 8px;
    outline: none;
    transition: all 0.2s ease;
}

input[type="text"]:focus, select:focus {
    border-color: var(--accent);
    background-color: #fff;
    box-shadow: 0 0 0 3px var(--accent-soft);
}

.radio-group, .checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.radio-label, .checkbox-label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    color: #444;
}

.button-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.btn {
    padding: 12px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 700;
    font-size: 0.85rem;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn.primary {
    background-color: var(--accent);
    color: #fff;
    box-shadow: 0 4px 6px rgba(0, 102, 255, 0.15);
}
.btn.primary:hover { 
    background-color: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 12px rgba(0, 102, 255, 0.2);
}

.btn.secondary {
    background-color: var(--bg-light);
    color: var(--text-main);
    border: 1px solid var(--border);
}
.btn.secondary:hover { background-color: #eee; }

.btn.danger {
    background-color: #fff;
    border: 1px solid #ff4d4f;
    color: #ff4d4f;
}
.btn.danger:hover { background-color: #fff1f0; }

/* History List */
#history-list {
    flex: 1;
    list-style: none;
    background-color: var(--bg-light);
    border-radius: 8px;
    overflow-y: auto;
    border: 1px solid var(--border);
}

#history-list li {
    padding: 12px 16px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 1px solid var(--border);
    transition: all 0.2s;
}

#history-list li:hover {
    background-color: var(--accent-soft);
    color: var(--accent);
}


.preview-area {
    flex: 1;
    background-color: #f1f3f5;
    padding: 60px;
    overflow: auto;
    display: flex;
    align-items: center;
    justify-content: center;
}

.canvas-container {
    background-color: #fff;
    padding: 60px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    min-width: fit-content;
}

pre#ascii-output {
    font-family: var(--font-mono);
    font-size: 15px;
    line-height: 1.2;
    color: #1a1a1a;
    white-space: pre;
    margin: 0;

    text-shadow: none;
}

.header-btn {
    background: transparent;
    border: 1px solid var(--border);
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-main);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s;
}

.header-btn:hover {
    background: #fff;
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.header-btn .icon {
    font-family: serif;
    background: var(--bg-light);
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 600;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
    animation: fadeIn 0.2s ease-out;
}

.modal-backdrop {
    position: absolute;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(5px);
}

/* --- Modal Window --- */
.modal-window {
    position: relative;
    background: #fff;
    width: 90%;
    max-width: 900px; 
    height: 80vh;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid rgba(0,0,0,0.05);
    animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #fff;
}

.modal-header h3 {
    font-size: 1rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: 0.5px;
}

.close-btn {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-muted);
    transition: color 0.2s;
}
.close-btn:hover { color: var(--text-main); }

.modal-content {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    background: var(--bg-light);
}

.catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

/* --- Grid Item (Card) --- */
.font-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.font-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.08);
}

.font-card.active-card {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-soft);
}

.font-card-img {
    width: 100%;
    height: 120px;
    object-fit: contain; 
    background: #fdfdfd;
    border-bottom: 1px solid var(--border);
    padding: 10px;
}

.font-card-info {
    padding: 12px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.font-name {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-main);
}

.select-label {
    font-size: 0.7rem;
    color: var(--accent);
    font-weight: 600;
    opacity: 0;
    transition: opacity 0.2s;
}

.header-controls {
    display: flex;
    gap: 10px;
}


.header-btn {
    text-decoration: none; 
    background: transparent;
    border: 1px solid var(--border);
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-main);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.secondary-btn {
    opacity: 0.8;
}

.secondary-btn:hover {
    opacity: 1;
    background: #fff;
    border-color: var(--text-muted);
    color: var(--text-main);
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.secondary-btn .icon {
    font-family: serif;
    background: #f0f0f0; 
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-weight: 900;
}

#loading-overlay {
  position: fixed;
  inset: 0;
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.3s ease;
}

#loading-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.loader {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 3px solid #e5e5e5;
  border-top-color: #111827;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.font-card:hover .select-label { opacity: 1; }

/* Animation */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }