:root {
    --primary-bg: #0a0a0a;
    --secondary-bg: #1a1a1a;
    --accent-bg: #252525;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --accent-color: #4a9eff;
    --border-color: #333;
    --error-color: #ff4a4a;
    --success-color: #4aff88;
}

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

body {
    font-family: 'Courier New', monospace;
    background-color: var(--primary-bg);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

header {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
}

.logo-section {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.header-logo {
    width: 80px;
    height: 80px;
}

.site-title {
    font-size: 2.5rem;
    letter-spacing: 0.3rem;
    margin: 0;
    color: var(--accent-color);
    font-weight: 700;
}

.app-title {
    font-size: 2rem;
    letter-spacing: 0.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 700;
}

h1 {
    font-size: 2.5rem;
    letter-spacing: 0.3rem;
    margin-bottom: 0.5rem;
    color: var(--accent-color);
    font-weight: 700;
}

.subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1rem;
}

h2 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
    letter-spacing: 0.1rem;
    text-transform: uppercase;
}

section {
    background-color: var(--secondary-bg);
    padding: 2rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.axioms-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
    margin-bottom: 0;
}

.axioms-header:hover {
    color: var(--text-primary);
}

.toggle-icon {
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.axioms.collapsed .toggle-icon {
    transform: rotate(-90deg);
}

.axioms-content {
    max-height: 2000px;
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.3s ease, margin-top 0.3s ease;
    margin-top: 1.5rem;
    opacity: 1;
}

.axioms.collapsed .axioms-content {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
}

.axioms-content h3 {
    font-size: 1rem;
    color: var(--accent-color);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05rem;
}

.axioms-content h3:first-child {
    margin-top: 0;
}

.axioms-content h3 a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.2s;
}

.axioms-content h3 a:hover {
    color: var(--text-primary);
    text-decoration: underline;
}

.axioms-content li a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.2s;
}

.axioms-content li a:hover {
    color: var(--text-primary);
    text-decoration: underline;
}

.axioms-content p {
    line-height: 1.7;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.axioms-content p em {
    color: var(--text-primary);
}

.axioms ul {
    list-style: none;
    margin-bottom: 1.5rem;
}

.axioms li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.axioms li:last-child {
    border-bottom: none;
}

.axioms strong {
    color: var(--accent-color);
}

.note {
    font-style: italic;
    color: var(--text-secondary);
    padding: 1rem;
    background-color: var(--accent-bg);
    border-left: 3px solid var(--accent-color);
    margin-top: 1rem;
}

.instruction {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--accent-color);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.05rem;
}

textarea,
input[type="password"] {
    width: 100%;
    padding: 1rem;
    background-color: var(--primary-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    border-radius: 4px;
    transition: border-color 0.3s;
}

textarea:focus,
input[type="password"]:focus {
    outline: none;
    border-color: var(--accent-color);
}

textarea {
    resize: vertical;
    min-height: 120px;
}

textarea:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

small {
    display: block;
    margin-top: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.example-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.example-btn {
    background-color: var(--accent-bg);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    font-family: 'Courier New', monospace;
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.05rem;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
    text-transform: none;
    width: auto;
}

.example-btn:hover:not(:disabled) {
    background-color: var(--border-color);
    color: var(--accent-color);
    border-color: var(--accent-color);
    transform: translateY(-1px);
}

.example-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

button {
    background-color: var(--accent-color);
    color: var(--primary-bg);
    padding: 1rem 2rem;
    border: none;
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.15rem;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.3s;
    text-transform: uppercase;
    width: 100%;
}

button:hover:not(:disabled) {
    background-color: #3a8eef;
    transform: translateY(-2px);
}

button:disabled {
    opacity: 0.8;
    cursor: not-allowed;
}

.loading-state {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.spinner {
    display: inline-block;
    font-size: 1.5rem;
    animation: spin 0.8s linear infinite;
}

.loading-text {
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

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

.secondary-btn {
    background-color: var(--accent-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    margin-top: 2rem;
}

.secondary-btn:hover {
    background-color: var(--border-color);
    border-color: var(--accent-color);
}

.copy-btn {
    background-color: var(--accent-bg);
    color: var(--text-secondary);
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--border-color);
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.05rem;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
    text-transform: none;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.copy-btn:hover:not(:disabled) {
    background-color: var(--border-color);
    color: var(--accent-color);
    border-color: var(--accent-color);
    transform: translateY(-1px);
}

.copy-btn.copied {
    background-color: var(--border-color);
    color: var(--success-color);
    border-color: var(--success-color);
}

.copy-icon {
    font-size: 1rem;
}

.output-content,
.error-content {
    background-color: var(--primary-bg);
    padding: 2rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    line-height: 1.8;
    white-space: pre-wrap;
    font-size: 0.95rem;
}

.output-content h1,
.output-content h2,
.output-content h3 {
    color: var(--accent-color);
    margin: 1.5rem 0 1rem 0;
}

.output-content h1 {
    font-size: 1.5rem;
}

.output-content h2 {
    font-size: 1.2rem;
}

.output-content h3 {
    font-size: 1rem;
}

.output-content strong {
    color: var(--success-color);
}

.output-content p {
    margin-bottom: 1rem;
}

.error-content {
    color: var(--error-color);
    border-color: var(--error-color);
}

footer {
    text-align: center;
    padding-top: 2rem;
    margin-top: 3rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.footer-link {
    margin-top: 1rem;
}

.footer-link a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s;
}

.footer-link a:hover {
    color: var(--text-primary);
    text-decoration: underline;
}

@media (max-width: 768px) {
    .container {
        padding: 1rem 0.5rem;
    }

    h1 {
        font-size: 1.8rem;
        letter-spacing: 0.2rem;
    }

    section {
        padding: 1.5rem;
    }

    button {
        padding: 0.875rem 1.5rem;
    }
}