:root {
    --bg-color: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --border-color: #30363d;
    
    --primary-color: #58a6ff;
    --primary-hover: #3182ce;
    --primary-focus: rgba(88, 166, 255, 0.3);
    
    --danger-color: #f85149;
    --success-color: #2ea043;
    --warning-color: #d29922;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'Fira Code', ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
    
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.2);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.3);
    
    --radius-md: 6px;
    --radius-lg: 12px;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    overflow: hidden; /* Prevent scrolling on body, let inner containers scroll */
}

/* App Layout */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar */
.sidebar {
    width: 320px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    z-index: 10;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    position: relative;
    background: linear-gradient(180deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 4px;
}

.logo i {
    color: var(--primary-color);
    width: 24px;
    height: 24px;
}

.logo h1 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #fff;
}

.subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.sidebar-actions {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    gap: 8px;
}

.webhook-list {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* Webhook Item */
.webhook-item {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.webhook-item:hover {
    border-color: var(--text-secondary);
    transform: translateY(-1px);
}

.webhook-item.active {
    border-color: var(--primary-color);
    background-color: rgba(88, 166, 255, 0.05);
    box-shadow: 0 0 0 1px var(--primary-color);
}

.webhook-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.method-badge {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
    background-color: var(--bg-tertiary);
}

.method-badge.get { color: var(--primary-color); }
.method-badge.post { color: var(--success-color); }
.method-badge.put { color: var(--warning-color); }
.method-badge.delete { color: var(--danger-color); }

.time-ago {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.webhook-path {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: #fff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-footer {
    padding: 15px 20px;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
}

.status-indicator span {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-secondary);
}

.status-indicator.online span {
    background-color: var(--success-color);
    box-shadow: 0 0 8px var(--success-color);
    animation: pulse 2s infinite;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    background-color: var(--bg-color);
}

.toolbar {
    height: 64px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    background-color: var(--bg-color);
    z-index: 5;
}

.toolbar-left {
    display: flex;
    align-items: baseline;
    gap: 12px;
    visibility: hidden; /* Hidden when empty state */
}

.toolbar-left.visible {
    visibility: visible;
}

.toolbar-left .request-method {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    color: var(--primary-color);
}

.toolbar-left .request-path {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    color: #fff;
}

.toolbar-right {
    display: flex;
    gap: 12px;
}

.content-body {
    flex: 1;
    position: relative;
    overflow-y: auto;
}

/* States */
.empty-state, .manual-input-state, .inspector-state {
    display: none;
    padding: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.empty-state.active, .manual-input-state.active, .inspector-state.active {
    display: block;
}

/* Empty State */
.empty-state {
    text-align: center;
    margin-top: 10vh;
}

.empty-icon-wrapper {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 80px;
    height: 80px;
    background-color: var(--bg-tertiary);
    border-radius: 50%;
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
}

.empty-icon-wrapper i {
    width: 32px;
    height: 32px;
    color: var(--primary-color);
}

.empty-state h2 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    color: #fff;
}

.empty-state p {
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

.empty-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
}

/* Manual Input State */
.manual-input-state h3 {
    margin-bottom: 8px;
    color: #fff;
}

.manual-input-state p {
    margin-bottom: 24px;
}

.code-editor {
    width: 100%;
    height: 400px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-primary);
    resize: vertical;
    outline: none;
    line-height: 1.6;
}

.code-editor:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-focus);
}

.manual-actions {
    margin-top: 24px;
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

/* Inspector State */
.tabs {
    display: flex;
    gap: 2px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 24px;
}

.tab-btn {
    padding: 12px 24px;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.tab-btn:hover {
    color: var(--text-primary);
    background-color: rgba(255,255,255,0.02);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-pane {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-pane.active {
    display: block;
}

/* Key Value Lists (Headers & Query) */
.key-value-list {
    display: flex;
    flex-direction: column;
    gap: 1px;
    background-color: var(--border-color); /* for tiny divider gaps */
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.kv-row {
    display: flex;
    background-color: var(--bg-color);
}

.kv-row:nth-child(even) {
    background-color: var(--bg-secondary);
}

.kv-key {
    width: 30%;
    min-width: 200px;
    padding: 12px 16px;
    font-family: var(--font-mono);
    color: var(--primary-color);
    border-right: 1px solid var(--border-color);
    word-break: break-all;
}

.kv-value {
    flex: 1;
    padding: 12px 16px;
    font-family: var(--font-mono);
    color: var(--text-primary);
    word-break: break-all;
}

/* Body Tab */
.code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-bottom: none;
    border-top-left-radius: var(--radius-md);
    border-top-right-radius: var(--radius-md);
}

.content-type-badge {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

pre {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-bottom-left-radius: var(--radius-md);
    border-bottom-right-radius: var(--radius-md);
    padding: 20px;
    overflow-x: auto;
}

pre code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: #e6edf3;
    line-height: 1.5;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: rgba(0,0,0,0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 500px;
    box-shadow: var(--shadow-lg);
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

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

.modal-body {
    padding: 24px;
}

.modal-body p {
    margin-bottom: 16px;
    color: var(--text-secondary);
}

.modal-footer {
    padding: 20px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.input-field {
    width: 100%;
    padding: 10px 14px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-mono);
    outline: none;
    transition: border-color 0.2s;
}

.input-field:focus {
    border-color: var(--primary-color);
}

.replay-warning {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px;
    background-color: rgba(210, 153, 34, 0.1);
    border-left: 3px solid var(--warning-color);
    border-radius: 4px;
    margin-top: 24px;
}

.replay-warning i {
    color: var(--warning-color);
    flex-shrink: 0;
}

.replay-warning p {
    margin-bottom: 0;
    font-size: 0.85rem;
    color: var(--text-primary);
}

/* Utilities & Components */
.text-muted {
    color: var(--text-secondary);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 16px;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid transparent;
}

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

.btn i {
    width: 16px;
    height: 16px;
}

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

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

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

.btn-secondary:not(:disabled):hover {
    background-color: rgba(255,255,255,0.1);
    border-color: var(--text-secondary);
}

.btn-danger {
    background-color: transparent;
    color: var(--danger-color);
    border-color: rgba(248, 81, 73, 0.2);
}

.btn-danger:not(:disabled):hover {
    background-color: rgba(248, 81, 73, 0.1);
    border-color: var(--danger-color);
}

.btn-icon {
    padding: 8px;
}

.btn-icon.btn-small {
    padding: 4px;
}

/* Toast */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 1000;
}

.toast {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    color: var(--text-primary);
    transform: translateX(120%);
    animation: slideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.toast.success i { color: var(--success-color); }
.toast.error i { color: var(--danger-color); }

.toast.closing {
    animation: slideOut 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Animations */
@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(46, 160, 67, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(46, 160, 67, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(46, 160, 67, 0); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
    from { transform: translateX(120%); }
    to { transform: translateX(0); }
}

@keyframes slideOut {
    from { transform: translateX(0); }
    to { transform: translateX(120%); opacity: 0; }
}

.pulse-icon {
    animation: floatPulse 3s infinite ease-in-out;
}

@keyframes floatPulse {
    0% { transform: scale(1); opacity: 0.8; }
    50% { transform: scale(1.1); opacity: 1; }
    100% { transform: scale(1); opacity: 0.8; }
}

/* Scrollbars */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: #484f58;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #6e7681;
}