:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #0f0f15;
    --bg-tertiary: #151520;
    --accent: #6366f1;
    --accent-hover: #4f46e5;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: #1e1e2e;
    --border-light: #2d2d42;
    --success: #10b981;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 30px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.header {
    padding: 40px 0 30px;
    text-align: center;
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 8px;
}

.logo-symbol {
    color: var(--accent);
    font-size: 32px;
    font-weight: 300;
    opacity: 0.8;
}

.logo-text {
    font-size: 32px;
    font-weight: 500;
    letter-spacing: -0.5px;
}

.header-subtitle {
    color: var(--text-secondary);
    font-size: 16px;
    font-weight: 400;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.main-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 60px;
    margin-bottom: 60px;
    flex: 1;
}

@media (min-width: 1024px) {
    .main-content {
        grid-template-columns: 2fr 1fr;
        gap: 80px;
    }
}

.form-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.form-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.form-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 500;
    color: var(--text-primary);
}

.icon {
    color: var(--accent);
    opacity: 0.9;
}

.max-size {
    color: var(--text-muted);
    font-size: 14px;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 400;
}

.textarea-wrapper {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

textarea {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 15px;
    line-height: 1.7;
    resize: none;
    outline: none;
    padding: 0;
    margin: 0;
    flex: 1;
    overflow-y: auto;
}

.textarea-footer {
    color: var(--text-muted);
    font-size: 14px;
    margin-top: 16px;
    text-align: right;
    font-family: 'JetBrains Mono', monospace;
    flex-shrink: 0;
}

.captcha-section {
    padding: 20px 24px;
    border-top: 1px solid var(--border);
    background: rgba(15, 15, 21, 0.5);
}

.captcha-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.captcha-label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

.captcha-refresh {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 6px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.captcha-refresh:hover {
    background: var(--border);
    color: var(--text-primary);
}

.captcha-question {
    font-size: 15px;
    font-weight: 500;
    margin-bottom: 12px;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
}

.captcha-input-wrapper {
    position: relative;
}

#captchaAnswer {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 15px;
    font-family: 'Inter', sans-serif;
    outline: none;
    transition: border-color 0.2s ease;
}

#captchaAnswer:focus {
    border-color: var(--accent);
}

.form-actions {
    display: flex;
    gap: 12px;
    padding: 0 24px 24px;
    flex-shrink: 0;
}

.btn {
    padding: 12px 28px;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 44px;
}

.btn-primary {
    background: var(--accent);
    color: white;
    flex: 1;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    padding: 12px 24px;
}

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

.btn-icon {
    width: 16px;
    height: 16px;
}

.info-section {
    padding-top: 20px;
    flex-shrink: 0;
}

.info-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
}

.info-content {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: 40px;
}

.info-content p {
    margin-bottom: 12px;
}

.code-example {
    margin-top: 30px;
}

.code-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.code-example pre {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    overflow-x: auto;
    margin: 0;
}

.code-example code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-secondary);
    display: block;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    overflow: hidden;
}

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

.modal-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 500;
    color: var(--success);
}

.modal-icon {
    color: var(--success);
}

.modal-close {
    color: var(--text-muted);
    font-size: 28px;
    cursor: pointer;
    line-height: 1;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
}

.modal-close:hover {
    background: var(--border);
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
}

.url-display {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.url-display input {
    flex: 1;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px 16px;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 15px;
    outline: none;
}

.copy-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0 20px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.2s ease;
    min-width: 100px;
    justify-content: center;
}

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

.modal-actions {
    display: flex;
    gap: 12px;
}

.footer {
    padding: 30px 0;
    border-top: 1px solid var(--border);
    text-align: center;
    flex-shrink: 0;
    margin-top: auto;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: var(--text-muted);
    font-size: 14px;
}

.footer-separator {
    opacity: 0.5;
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    
    .header {
        padding: 30px 0 20px;
    }
    
    .logo-symbol,
    .logo-text {
        font-size: 28px;
    }
    
    .main-content {
        gap: 40px;
        margin-bottom: 40px;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 8px;
    }
    
    .footer-separator {
        display: none;
    }
}

@media (max-height: 800px) {
    .header {
        padding: 30px 0 20px;
    }
    
    textarea {
        rows: 16;
    }
    
    .footer {
        padding: 20px 0;
    }
}

.error-message {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.error-message::before {
    content: '⚠️';
}

textarea::-webkit-scrollbar {
    width: 8px;
}

textarea::-webkit-scrollbar-track {
    background: transparent;
}

textarea::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

textarea::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}