:root {
    --primary-color: #25D366;
    --primary-dark: #128C7E;
    --bg-color: #0f1115;
    --panel-bg: #1a1d24;
    --text-primary: #ffffff;
    --text-secondary: #a0aab2;
    --danger: #ef4444;
    --border-color: #2a2f38;
    --info-color: #3b82f6;
    --warning-color: #f59e0b;
}

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

body {
    font-family: 'Tajawal', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 40px 20px;
}

.app-container {
    width: 100%;
    max-width: 850px;
    background: var(--panel-bg);
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    padding: 35px;
    border: 1px solid var(--border-color);
}

header {
    text-align: center;
    margin-bottom: 25px;
}

header h1 {
    color: var(--primary-color);
    font-size: 28px;
    margin-bottom: 8px;
}

header p {
    color: var(--text-secondary);
    font-size: 15px;
}

/* Tabs Navigation */
.nav-tabs {
    display: flex;
    gap: 12px;
    margin-bottom: 25px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
}

.tab-btn {
    flex: 1;
    padding: 12px 18px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.25s ease;
}

.tab-btn:hover {
    background: rgba(255, 255, 255, 0.07);
    color: #fff;
}

.tab-btn.active {
    background: var(--primary-dark);
    color: #fff;
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.2);
}

.panel {
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.text-center {
    text-align: center;
}

.section-title {
    color: var(--primary-color);
    font-size: 20px;
    margin-bottom: 6px;
}

.panel-desc {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 20px;
}

.hidden {
    display: none !important;
}

/* Forms & Inputs */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.label-with-action {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.radio-group {
    display: flex;
    gap: 20px;
    background: rgba(0, 0, 0, 0.2);
    padding: 12px 18px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
}

.radio-label input[type="radio"] {
    accent-color: var(--primary-color);
    width: 16px;
    height: 16px;
}

.select-with-btn {
    display: flex;
    gap: 10px;
}

.form-select, .form-input, .form-textarea {
    width: 100%;
    padding: 12px;
    background: #14171d;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: #fff;
    font-family: inherit;
    font-size: 14px;
    transition: border-color 0.2s;
}

.form-select:focus, .form-input:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-textarea {
    resize: vertical;
    line-height: 1.6;
}

/* Status Indicator */
.status-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
    font-size: 18px;
    font-weight: 500;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.disconnected { background-color: var(--danger); box-shadow: 0 0 10px var(--danger); }
.dot.connected { background-color: var(--primary-color); box-shadow: 0 0 10px var(--primary-color); }
.dot.waiting { background-color: #f59e0b; box-shadow: 0 0 10px #f59e0b; }

/* QR & Ready Containers */
.qr-container, .ready-container {
    text-align: center;
}

.qr-container h3 {
    margin-bottom: 15px;
    color: var(--text-secondary);
}

#qr-image {
    background: white;
    padding: 10px;
    border-radius: 8px;
    max-width: 250px;
}

.success-icon {
    width: 50px;
    height: 50px;
    fill: var(--primary-color);
    margin-bottom: 10px;
}

.ready-container h3 {
    margin-bottom: 10px;
    color: var(--primary-color);
}

/* Buttons */
.btn {
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-family: inherit;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: transform 0.2s, box-shadow 0.2s, filter 0.2s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    filter: brightness(1.1);
}

.btn:active {
    transform: translateY(0);
}

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

.secondary-btn {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: 1px solid var(--border-color);
    white-space: nowrap;
}

.link-btn {
    background: transparent;
    color: var(--primary-color);
    padding: 0;
    font-size: 13px;
    text-decoration: underline;
}
.link-btn:hover {
    transform: none;
    box-shadow: none;
    color: #fff;
}

.full-width {
    width: 100%;
}

.large-btn {
    padding: 16px 32px;
    font-size: 17px;
}

.excel-btn { background: #107c41; color: #fff; flex: 1; }
.txt-btn { background: #3b82f6; color: #fff; flex: 1; }
.vcf-btn { background: #f97316; color: #fff; flex: 1; }

.actions-group {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

/* Stats Cards */
.stats-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.stat-card {
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 12px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-num {
    font-size: 22px;
    font-weight: bold;
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
}

.stat-total .stat-num { color: #fff; }
.stat-success .stat-num { color: var(--primary-color); }
.stat-invited .stat-num { color: var(--info-color); }
.stat-already .stat-num { color: var(--warning-color); }
.stat-failed .stat-num { color: var(--danger); }

/* Badges */
.badge {
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 700;
    display: inline-block;
}

.badge-success { background: rgba(37, 211, 102, 0.2); color: var(--primary-color); border: 1px solid rgba(37, 211, 102, 0.3); }
.badge-info { background: rgba(59, 130, 246, 0.2); color: var(--info-color); border: 1px solid rgba(59, 130, 246, 0.3); }
.badge-warning { background: rgba(245, 158, 11, 0.2); color: var(--warning-color); border: 1px solid rgba(245, 158, 11, 0.3); }
.badge-danger { background: rgba(239, 68, 68, 0.2); color: var(--danger); border: 1px solid rgba(239, 68, 68, 0.3); }

/* Table Container & Table */
.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.counter {
    background: rgba(37, 211, 102, 0.1);
    color: var(--primary-color);
    padding: 6px 14px;
    border-radius: 20px;
    font-weight: bold;
    border: 1px solid rgba(37, 211, 102, 0.2);
    font-size: 14px;
}

.table-container {
    max-height: 380px;
    overflow-y: auto;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px 15px;
    text-align: right;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
}

th {
    background: rgba(255, 255, 255, 0.05);
    position: sticky;
    top: 0;
    font-weight: bold;
    color: var(--text-secondary);
}

tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

/* Loading Overlay */
#loading-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15, 17, 21, 0.9);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 18px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 7px;
}
::-webkit-scrollbar-track {
    background: var(--bg-color);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Bulk Broadcast UI Styles */
.broadcast-controls {
    display: flex;
    gap: 12px;
}

.danger-btn {
    background: #dc2626;
    color: #fff;
    border: 1px solid #ef4444;
}

.danger-btn:hover {
    background: #b91c1c;
    box-shadow: 0 5px 15px rgba(220, 38, 38, 0.4);
}

.progress-bar-container {
    width: 100%;
    height: 14px;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
    margin: 15px 0 10px 0;
    position: relative;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #128C7E, #25D366);
    box-shadow: 0 0 12px rgba(37, 211, 102, 0.6);
    border-radius: 10px;
    transition: width 0.35s ease-in-out;
}

.progress-stats-text {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--text-secondary);
}

.pulse-indicator {
    width: 10px;
    height: 10px;
    background-color: var(--primary-color);
    border-radius: 50%;
    box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7);
    animation: pulse 1.6s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7);
    }
    70% {
        transform: scale(1);
        box-shadow: 0 0 0 8px rgba(37, 211, 102, 0);
    }
    100% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0);
    }
}

/* Image Upload & Dropzone Styles */
.image-dropzone {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 20px;
    background: rgba(0, 0, 0, 0.2);
    text-align: center;
    cursor: pointer;
    transition: all 0.25s ease;
}

.image-dropzone:hover {
    border-color: var(--primary-color);
    background: rgba(37, 211, 102, 0.05);
}

.image-dropzone.dragover {
    border-color: var(--primary-color);
    background: rgba(37, 211, 102, 0.12);
    transform: scale(1.01);
}

.image-upload-prompt {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
}

.image-upload-icon {
    fill: var(--primary-color);
    opacity: 0.8;
    margin-bottom: 4px;
}

.dropzone-main-text {
    font-weight: 700;
    font-size: 14px;
    color: var(--text-primary);
}

.dropzone-sub-text {
    font-size: 12px;
    color: var(--text-secondary);
}

.image-preview-container {
    display: flex;
    align-items: center;
    gap: 18px;
    text-align: right;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    padding: 12px 16px;
    border-radius: 10px;
}

.image-preview-wrapper {
    flex-shrink: 0;
    width: 90px;
    height: 90px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: #000;
}

.image-preview-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.image-info-wrapper {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex-grow: 1;
}

.image-name-text {
    font-weight: 700;
    font-size: 14px;
    color: var(--text-primary);
    word-break: break-all;
}

.image-size-text {
    font-size: 12px;
    color: var(--text-secondary);
}

.danger-btn-sm {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
    padding: 6px 14px;
    font-size: 12px;
    font-weight: 600;
    align-self: flex-start;
    border-radius: 6px;
}

.danger-btn-sm:hover {
    background: var(--danger);
    color: #fff;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}