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

:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --danger: #dc2626;
    --danger-hover: #b91c1c;
    --success: #16a34a;
    --warning: #d97706;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --radius: 12px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

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

header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.subtitle {
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.card h2 {
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
}

.description {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

/* Token input */
.token-input-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.8rem;
    resize: vertical;
    transition: border-color 0.2s;
}

textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.button-group {
    display: flex;
    gap: 0.5rem;
}

/* Config grid */
.config-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.config-grid label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.config-grid input {
    width: 100%;
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.85rem;
}

.config-grid input:focus {
    outline: none;
    border-color: var(--primary);
}

/* Buttons */
.btn {
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

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

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
}

.btn-secondary {
    background: #f1f5f9;
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: #e2e8f0;
}

.btn-outline {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border);
}

.btn-outline:hover {
    background: #f8fafc;
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    background: var(--danger-hover);
}

/* Token info */
.token-info {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-family: 'SF Mono', 'Fira Code', monospace;
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    white-space: pre-wrap;
    word-break: break-all;
}

.token-info.error {
    background: #fef2f2;
    border-color: #fecaca;
}

/* API config */
.api-config {
    margin-bottom: 1rem;
}

.api-config label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.api-config input {
    width: 100%;
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.85rem;
}

.api-config input:focus {
    outline: none;
    border-color: var(--primary);
}

.api-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* Response */
.response-status {
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: 0.75rem;
}

.response-status.success {
    background: #f0fdf4;
    color: var(--success);
    border: 1px solid #bbf7d0;
}

.response-status.error {
    background: #fef2f2;
    color: var(--danger);
    border: 1px solid #fecaca;
}

.response-body {
    background: #1e293b;
    color: #e2e8f0;
    padding: 1rem;
    border-radius: 8px;
    font-size: 0.8rem;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
    min-height: 60px;
    margin-bottom: 1rem;
}

/* Flow diagram */
.flow-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 0;
    flex-wrap: wrap;
}

.flow-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border);
    border-radius: 10px;
    min-width: 100px;
    transition: all 0.3s;
}

.flow-step.active {
    border-color: var(--primary);
    background: #eff6ff;
}

.flow-step.success {
    border-color: var(--success);
    background: #f0fdf4;
}

.flow-step.error {
    border-color: var(--danger);
    background: #fef2f2;
}

.flow-icon {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.flow-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
}

.flow-arrow {
    font-size: 1.25rem;
    color: var(--text-muted);
}

/* Toggle */
.toggle {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
}

.toggle input {
    display: none;
}

.toggle-slider {
    width: 44px;
    height: 24px;
    background: #cbd5e1;
    border-radius: 12px;
    position: relative;
    transition: background 0.2s;
}

.toggle-slider::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    top: 2px;
    left: 2px;
    transition: transform 0.2s;
}

.toggle input:checked + .toggle-slider {
    background: var(--primary);
}

.toggle input:checked + .toggle-slider::after {
    transform: translateX(20px);
}

.toggle-label {
    font-size: 0.9rem;
    font-weight: 500;
}

.hidden {
    display: none;
}

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

.loading {
    animation: pulse 1s ease-in-out infinite;
}