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

:root {
    --primary: #5865f2;
    --primary-hover: #4752c4;
    --secondary: #4f545c;
    --success: #57f287;
    --warning: #fee75c;
    --danger: #ed4245;
    --bg-primary: #36393f;
    --bg-secondary: #2f3136;
    --bg-tertiary: #202225;
    --text-primary: #ffffff;
    --text-secondary: #b9bbbe;
    --text-muted: #72767d;
    --border: #40444b;
    --shadow: 0 8px 16px rgba(0, 0, 0, 0.24);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
    --border-radius: 8px;
    --border-radius-lg: 12px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-primary) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
    padding: 24px 32px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 8px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.header p {
    opacity: 0.9;
    font-size: 1.1rem;
}

.webhook-url-section {
    padding: 24px 32px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-primary);
    display: flex;
    gap: 16px;
    align-items: flex-end;
}

.webhook-url-section .form-field {
    flex-grow: 1;
    margin-bottom: 0;
}

.input-group {
    position: relative;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-secondary);
}

.input-group input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: 14px;
    transition: all 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(88, 101, 242, 0.1);
    transform: translateY(-1px);
}

.tabs {
    display: flex;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.tabs::-webkit-scrollbar {
    display: none;
}

.tab-button {
    flex: 1;
    min-width: 150px;
    padding: 16px 24px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    font-size: 14px;
}

.tab-button:hover {
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.05);
}

.tab-button.active {
    color: var(--primary);
    background: rgba(88, 101, 242, 0.1);
}

.tab-button.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary);
    border-radius: 3px 3px 0 0;
}

.tab-content {
    padding: 32px;
    min-height: 500px;
    background: var(--bg-secondary);
}

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

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

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.form-grid {
    display: grid;
    gap: 20px;
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .form-grid.two-columns {
        grid-template-columns: 1fr 1fr;
    }
}

.form-field {
    display: flex;
    flex-direction: column;
}

.form-field label {
    margin-bottom: 6px;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 14px;
}

.form-field input,
.form-field textarea,
.form-field select {
    padding: 12px 16px;
    background: var(--bg-primary);
    border: 2px solid var(--border);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: 14px;
    transition: all 0.3s ease;
    font-family: inherit;
}

.form-field textarea {
    min-height: 100px;
    resize: vertical;
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(88, 101, 242, 0.1);
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 16px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.checkbox-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

.checkbox-item label {
    margin: 0;
    font-size: 14px;
    color: var(--text-secondary);
    cursor: pointer;
}

.color-picker {
    display: flex;
    align-items: center;
    gap: 12px;
}

.color-preview {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius);
    border: 2px solid var(--border);
    cursor: pointer;
    transition: transform 0.2s ease;
}

.color-preview:hover {
    transform: scale(1.05);
}

.color-input {
    width: 60px !important;
    height: 40px !important;
    padding: 0 !important;
    border: none !important;
    cursor: pointer;
    opacity: 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

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

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
    color: var(--text-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(88, 101, 242, 0.3);
}

.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, #3ba55c 100%);
    color: var(--bg-tertiary);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(87, 242, 135, 0.3);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning) 0%, #f9c23c 100%);
    color: var(--bg-tertiary);
}

.btn-warning:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(254, 231, 92, 0.3);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #c73e3e 100%);
    color: var(--text-primary);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(237, 66, 69, 0.3);
}

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

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

.file-upload-area {
    border: 2px dashed var(--border);
    border-radius: var(--border-radius);
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: transparent; /* Added for dragleave reset */
}

.file-upload-area:hover,
.file-upload-area.dragover { /* Added for visual cue */
    border-color: var(--primary);
    background: var(--bg-primary);
}

.file-list {
    margin-top: 20px;
    max-height: 200px;
    overflow-y: auto;
}

.file-item {
    background: var(--bg-primary);
    padding: 10px 15px;
    border-radius: var(--border-radius);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    font-size: 14px;
}

.file-item span {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-item button {
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
    font-size: 16px;
}

.embed-preview {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 20px;
    border-left: 4px solid var(--border);
    margin-top: 20px;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 20px;
}

.embed-preview.has-color {
    border-left-color: var(--primary);
}

.embed-author {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 14px;
}

.embed-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
    text-decoration: none;
}

.embed-title:hover {
    text-decoration: underline;
}

.embed-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
    word-break: break-word;
    white-space: pre-wrap;
}

.embed-thumbnail-preview {
    max-width: 80px;
    max-height: 80px;
    border-radius: var(--border-radius);
    float: right;
    margin-left: 10px;
}

.embed-image-preview {
    max-width: 100%;
    border-radius: var(--border-radius);
    margin-top: 16px;
}

.embed-fields {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 12px;
}

.embed-field {
    display: flex;
    flex-direction: column;
}

.embed-field.inline {
    display: inline-block;
    width: calc(50% - 6px);
    vertical-align: top;
    margin-right: 12px;
}

.embed-field-name {
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.embed-field-value {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
    word-break: break-word;
}

.embed-footer {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 12px;
    clear: both;
}

.embed-field-group {
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: 12px;
    margin-bottom: 10px;
    background: var(--bg-tertiary);
}

.embed-field-group .form-field {
    margin-bottom: 10px;
}

.embed-field-group .btn-danger {
    padding: 6px 12px;
    font-size: 12px;
}

.status-bar {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 12px 20px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    transform: translateX(400px);
    transition: transform 0.3s ease;
    z-index: 1000;
    max-width: 300px;
}

.status-bar.show {
    transform: translateX(0);
}

.status-bar.success {
    background: var(--success);
    color: var(--bg-tertiary);
}

.status-bar.warning {
    background: var(--warning);
    color: var(--bg-tertiary);
}

.status-bar.error {
    background: var(--danger);
}

.message-id-display {
    background: var(--bg-primary);
    padding: 16px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    border: 1px solid var(--border);
}

.message-id-display h4 {
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-size: 14px;
}

.message-id-value {
    font-family: 'Courier New', monospace;
    background: var(--bg-tertiary);
    padding: 8px 12px;
    border-radius: var(--border-radius);
    color: var(--primary);
    word-break: break-all;
}

.loading-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: currentColor;
    animation: spin 1s ease-in-out infinite;
}

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

.card {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 24px;
    margin-bottom: 20px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.card-title {
    color: var(--text-primary);
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

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

/* --- NEW MODAL STYLES --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal-overlay.show {
    display: flex;
    opacity: 1;
}

.modal-content {
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    transform: scale(0.95);
    transition: transform 0.3s ease;
}

.modal-overlay.show .modal-content {
    transform: scale(1);
}

.webhook-list-item {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 12px;
    align-items: center;
    background: var(--bg-secondary);
    padding: 12px 16px;
    border-radius: var(--border-radius);
    margin-bottom: 8px;
    border: 1px solid var(--border);
}

.webhook-list-item div {
    overflow: hidden;
}

.webhook-list-item span {
    font-weight: 600;
    color: var(--text-primary);
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.webhook-list-item small {
    font-size: 12px;
    color: var(--text-muted);
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .webhook-url-section {
        flex-direction: column;
        align-items: stretch;
    }
    
    .webhook-url-section button {
        width: 100%;
    }

    .container {
        border-radius: 0;
    }

    .header {
        padding: 20px;
    }

    .header h1 {
        font-size: 2rem;
    }

    .tab-content {
        padding: 20px;
    }

    .tabs {
        flex-wrap: wrap;
    }

    .tab-button {
        min-width: 120px;
        font-size: 12px;
        padding: 12px 16px;
    }

    .button-group {
        flex-direction: column;
    }

    .form-grid.two-columns {
        grid-template-columns: 1fr;
    }
}