:root {
    --bg-main: #0c1017;
    --bg-sidebar: #131822;
    --bg-card: #181f2c;
    --bg-input: #0f141d;
    --border-color: #232d3f;
    --border-focus: #25d366;
    --primary: #25d366;
    --primary-dark: #128c7e;
    --primary-light: #2ee26f;
    --accent: #3b82f6;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-dim: #64748b;
    --danger: #ef4444;
    --warning: #f59e0b;
    --success: #10b981;
    --info: #06b6d4;
    --font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --radius: 12px;
    --transition: all 0.2s ease-in-out;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
}

.brand {
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 14px;
    border-bottom: 1px solid var(--border-color);
}

.brand-logo {
    width: 44px;
    height: 44px;
    background: rgba(37, 211, 102, 0.12);
    border: 1px solid rgba(37, 211, 102, 0.3);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.brand-logo svg {
    width: 26px;
    height: 26px;
}

.brand-info h2 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -0.02em;
}

.brand-info span {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: block;
}

.nav-menu {
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: 10px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-size: 0.92rem;
    font-weight: 500;
    cursor: pointer;
    text-align: left;
    transition: var(--transition);
    width: 100%;
}

.nav-item:hover {
    background-color: rgba(255, 255, 255, 0.04);
    color: var(--text-main);
}

.nav-item.active {
    background: rgba(37, 211, 102, 0.12);
    color: var(--primary);
    border-left: 3px solid var(--primary);
}

.nav-item .icon {
    font-size: 1.1rem;
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 600;
}

.status-indicator.online {
    color: var(--primary);
}

.status-indicator.warning {
    color: var(--warning);
}

.status-indicator .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: currentColor;
    box-shadow: 0 0 10px currentColor;
}

.version-tag {
    font-size: 0.75rem;
    color: var(--text-dim);
    margin-top: 6px;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    max-height: 100vh;
}

.topbar {
    padding: 24px 32px;
    border-bottom: 1px solid var(--border-color);
    background-color: rgba(19, 24, 34, 0.8);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 20;
}

.topbar-title h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.topbar-title p {
    font-size: 0.88rem;
    color: var(--text-muted);
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.badge-pill {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.82rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.badge-pill span {
    color: var(--text-dim);
}

.badge-pill code {
    color: var(--primary);
    font-family: var(--font-mono);
}

.content-body {
    padding: 32px;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
    animation: fadeIn 0.25s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}

.stat-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    transition: var(--transition);
}

.stat-card:hover {
    border-color: rgba(37, 211, 102, 0.4);
    transform: translateY(-2px);
}

.stat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.82rem;
    color: var(--text-muted);
    font-weight: 500;
}

.stat-value {
    font-size: 2.2rem;
    font-weight: 800;
    margin: 10px 0 4px;
    color: var(--text-main);
    letter-spacing: -0.03em;
}

.stat-desc {
    font-size: 0.78rem;
    color: var(--text-dim);
}

/* Badges */
.badge {
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge.blue { background: rgba(59, 130, 246, 0.15); color: #60a5fa; }
.badge.green { background: rgba(16, 185, 129, 0.15); color: #34d399; }
.badge.purple { background: rgba(168, 85, 247, 0.15); color: #c084fc; }
.badge.red { background: rgba(239, 68, 68, 0.15); color: #f87171; }
.badge-alert { background: rgba(239, 68, 68, 0.15); color: #f87171; padding: 2px 8px; border-radius: 6px; font-size: 0.8rem; }
.badge-success { background: rgba(16, 185, 129, 0.15); color: #34d399; padding: 2px 8px; border-radius: 6px; font-size: 0.8rem; }

/* Cards & Layout */
.cards-grid {
    display: grid;
    gap: 24px;
}

.two-columns {
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
}

.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
}

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

.card-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

.card-body {
    padding: 24px;
}

.card-body.p-0 {
    padding: 0;
}

/* Forms & Inputs */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.form-group .required {
    color: var(--danger);
}

.form-row {
    display: flex;
    gap: 16px;
}

.form-row .col {
    flex: 1;
}

.form-control {
    width: 100%;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 0.92rem;
    font-family: inherit;
    outline: none;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 2px rgba(37, 211, 102, 0.2);
}

.form-control-sm {
    padding: 6px 10px;
    font-size: 0.82rem;
}

textarea.form-control {
    resize: vertical;
}

.hint {
    display: block;
    font-size: 0.78rem;
    color: var(--text-dim);
    margin-top: 6px;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.88rem;
    color: var(--text-muted);
}

.input-with-copy {
    display: flex;
    gap: 8px;
}

.input-with-copy input {
    flex: 1;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px 12px;
    color: var(--text-main);
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 8px;
    border: none;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--primary);
    color: #0c1017;
}

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

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.08);
    color: var(--text-main);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.14);
}

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

.btn-outline:hover {
    border-color: var(--text-muted);
    color: var(--text-main);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.8rem;
    border-radius: 6px;
}

.btn-danger-sm {
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.3);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.78rem;
    cursor: pointer;
}

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

.btn-icon {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    padding: 4px;
}

/* Info List */
.info-list {
    list-style: none;
}

.info-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

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

.info-list .label {
    font-size: 0.88rem;
    color: var(--text-muted);
}

.info-list .val code {
    background-color: var(--bg-input);
    padding: 4px 8px;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--primary);
}

/* Tester Layout */
.tester-layout {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 24px;
}

.subtabs {
    display: flex;
    gap: 6px;
    background-color: var(--bg-input);
    padding: 4px;
    border-radius: 8px;
}

.subtab-btn {
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-size: 0.8rem;
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
}

.subtab-btn.active {
    background-color: var(--bg-card);
    color: var(--primary);
    font-weight: 600;
}

.subtab-content {
    display: none;
    margin-top: 16px;
}

.subtab-content.active {
    display: block;
}

.note-box {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.25);
    border-radius: 8px;
    padding: 12px;
    font-size: 0.84rem;
    color: #93c5fd;
    margin-top: 12px;
}

.json-viewer-container {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    max-height: 480px;
    overflow-y: auto;
}

.json-viewer-container pre {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: #e2e8f0;
    white-space: pre-wrap;
    word-break: break-all;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

.table th {
    background-color: rgba(255, 255, 255, 0.02);
    text-align: left;
    padding: 14px 18px;
    color: var(--text-muted);
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
}

.table td {
    padding: 14px 18px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.table tr:hover td {
    background-color: rgba(255, 255, 255, 0.02);
}

.direction-badge {
    font-size: 0.75rem;
    padding: 3px 8px;
    border-radius: 6px;
    font-weight: 600;
}

.direction-badge.outbound { background: rgba(59, 130, 246, 0.15); color: #60a5fa; }
.direction-badge.inbound { background: rgba(16, 185, 129, 0.15); color: #34d399; }

.status-badge {
    font-size: 0.75rem;
    padding: 3px 8px;
    border-radius: 6px;
    font-weight: 600;
    text-transform: capitalize;
}

.status-sent { background: rgba(16, 185, 129, 0.15); color: #34d399; }
.status-delivered { background: rgba(6, 182, 212, 0.15); color: #22d3ee; }
.status-read { background: rgba(168, 85, 247, 0.15); color: #c084fc; }
.status-failed { background: rgba(239, 68, 68, 0.15); color: #f87171; }
.status-pending { background: rgba(245, 158, 11, 0.15); color: #fbbf24; }

.type-tag {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.75rem;
}

.content-cell {
    max-width: 250px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Code Snippets & Docs */
.code-lang-selector {
    display: flex;
    gap: 8px;
}

.code-tab {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 0.82rem;
    cursor: pointer;
    transition: var(--transition);
}

.code-tab.active {
    background-color: var(--primary);
    color: #0c1017;
    border-color: var(--primary);
    font-weight: 600;
}

.code-block-wrapper {
    display: none;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.code-block-wrapper.active {
    display: block;
}

.code-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 16px;
    background-color: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.btn-copy-code {
    background: rgba(37, 211, 102, 0.15);
    border: 1px solid rgba(37, 211, 102, 0.3);
    color: var(--primary);
    padding: 4px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.75rem;
    font-weight: 600;
}

.btn-copy-code:hover {
    background: var(--primary);
    color: #0c1017;
}

.code-block-wrapper pre {
    padding: 18px;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
    color: #f1f5f9;
}

/* Alert Boxes */
.alert-box {
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.88rem;
}

.alert-box.success {
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #34d399;
}

.alert-box.error {
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #f87171;
}

/* Tag links & chips */
.tag-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}

.tag-link {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.8rem;
    text-decoration: none;
    transition: var(--transition);
}

.tag-link:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.chips {
    display: flex;
    gap: 8px;
    margin-top: 8px;
}

.chip {
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: #60a5fa;
    padding: 4px 10px;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.subscribers-ul {
    list-style: none;
}

.subscribers-ul li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.subscribers-ul .url-text {
    display: block;
    font-size: 0.78rem;
    color: var(--text-dim);
    font-family: var(--font-mono);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.modal-content {
    background-color: var(--bg-card);
    margin: 6% auto;
    width: 90%;
    max-width: 650px;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    overflow: hidden;
    animation: modalIn 0.2s ease-out;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header .close {
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-dim);
}

.modal-body {
    padding: 20px;
    max-height: 500px;
    overflow-y: auto;
}

.modal-body pre {
    background-color: var(--bg-input);
    padding: 14px;
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: #e2e8f0;
    white-space: pre-wrap;
    word-break: break-all;
}

/* Responsive */
@media (max-width: 992px) {
    .app-container { flex-direction: column; }
    .sidebar { width: 100%; height: auto; position: static; }
    .tester-layout { grid-template-columns: 1fr; }
    .topbar { flex-direction: column; align-items: flex-start; gap: 12px; }
}