/* =========================
   CSS Variables
   ========================= */
:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-card: rgba(255, 255, 255, 0.05);
    --bg-card-hover: rgba(255, 255, 255, 0.08);
    --border-color: rgba(255, 255, 255, 0.1);
    --border-color-hover: rgba(255, 255, 255, 0.2);
    
    --text-primary: #e5e7eb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --color-primary: #60a5fa;
    --color-primary-hover: #3b82f6;
    --color-success: #10b981;
    --color-success-bg: rgba(16, 185, 129, 0.15);
    --color-warning: #f59e0b;
    --color-warning-bg: rgba(245, 158, 11, 0.15);
    --color-error: #ef4444;
    --color-error-bg: rgba(239, 68, 68, 0.15);
    --color-info: #60a5fa;
    --color-info-bg: rgba(96, 165, 250, 0.15);
    --color-purple: #a78bfa;
    --color-purple-bg: rgba(167, 139, 250, 0.15);
    
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    
    --transition-fast: 0.15s ease;
    --transition-normal: 0.2s ease;
    --transition-slow: 0.3s ease;
}

/* =========================
   Reset & Base
   ========================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-hover);
}

/* =========================
   Layout
   ========================= */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

.main-content {
    padding: 20px 0;
    min-height: calc(100vh - 140px);
}

/* =========================
   Navigation
   ========================= */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
}

.nav-brand i {
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    gap: 8px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.nav-link:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.nav-link.active {
    background: var(--color-info-bg);
    color: var(--color-primary);
}

/* =========================
   Page Header
   ========================= */
.page-header {
    text-align: center;
    margin-bottom: 30px;
    padding: 30px;
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
}

.page-header h1 {
    color: var(--color-primary);
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* =========================
   Cards
   ========================= */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    margin-bottom: 24px;
    overflow: hidden;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.02);
}

.card-header h2 {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-primary);
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card-body {
    padding: 24px;
}

/* =========================
   Forms
   ========================= */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-input,
.form-select {
    width: 100%;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.1);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-select {
    cursor: pointer;
}

.form-select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* Date/Time Grid */
.date-time-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 20px;
}

@media (max-width: 768px) {
    .date-time-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Filter Row */
.filter-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    align-items: flex-end;
}

.filter-row .form-group {
    flex: 1;
    min-width: 200px;
    margin-bottom: 0;
}

/* =========================
   Buttons
   ========================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

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

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

.btn-lg {
    padding: 14px 28px;
    font-size: 1rem;
}

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

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--border-color-hover);
}

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

.btn-success:hover:not(:disabled) {
    background: #0ea572;
}

.btn-danger {
    background: var(--color-error-bg);
    color: var(--color-error);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover:not(:disabled) {
    background: rgba(239, 68, 68, 0.25);
}

.btn-warning {
    background: var(--color-warning-bg);
    color: var(--color-warning);
}

/* Preset Buttons */
.preset-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.btn-preset {
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-preset:hover {
    background: var(--color-info-bg);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* File Buttons */
.btn-file {
    padding: 6px 12px;
    font-size: 0.8rem;
    border-radius: var(--radius-sm);
}

.btn-dashboard {
    background: var(--color-info-bg);
    color: var(--color-primary);
}

.btn-summary {
    background: var(--color-success-bg);
    color: var(--color-success);
}

.btn-detailed {
    background: var(--color-purple-bg);
    color: var(--color-purple);
}

.btn-speedtest {
    background: var(--color-warning-bg);
    color: var(--color-warning);
}

/* =========================
   File Upload
   ========================= */
.file-upload {
    position: relative;
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.file-upload:hover {
    border-color: var(--color-primary);
    background: rgba(96, 165, 250, 0.05);
}

.file-upload.dragover {
    border-color: var(--color-success);
    background: rgba(16, 185, 129, 0.1);
}

.file-upload input[type="file"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.file-upload i {
    font-size: 2.5rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.file-upload p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.file-upload .file-name {
    display: block;
    margin-top: 12px;
    padding: 8px 12px;
    background: var(--color-success-bg);
    border-radius: var(--radius-sm);
    color: var(--color-success);
    font-size: 0.85rem;
}

.file-upload .file-name:empty {
    display: none;
}

/* =========================
   Device List
   ========================= */
.device-list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 12px;
}

.device-list {
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.device-item {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    transition: background var(--transition-fast);
}

.device-item:last-child {
    border-bottom: none;
}

.device-item:hover {
    background: var(--bg-card-hover);
}

.device-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.device-id {
    font-weight: 500;
    color: var(--text-primary);
}

.device-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Checkbox Label */
.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-top: 2px;
    cursor: pointer;
    accent-color: var(--color-primary);
}

/* =========================
   Satellite Selection
   ========================= */
.satellite-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 12px;
}

.satellite-item {
    padding: 8px 14px;
    background: var(--bg-card-hover);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

/* =========================
   Progress
   ========================= */
.progress-container {
    margin-bottom: 24px;
}

.progress-bar {
    height: 24px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-success));
    border-radius: var(--radius-lg);
    transition: width var(--transition-slow);
}

.progress-text {
    text-align: center;
    margin-top: 8px;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
}

.status-message {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 16px;
    background: var(--bg-card-hover);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-size: 1rem;
}

.device-progress-list {
    max-height: 300px;
    overflow-y: auto;
}

.device-progress-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border-color);
}

.device-progress-icon {
    width: 24px;
    text-align: center;
}

.device-progress-name {
    flex: 1;
    font-family: monospace;
    font-size: 0.9rem;
}

.device-progress-status {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.elapsed-time {
    text-align: center;
    margin-top: 20px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* =========================
   Results
   ========================= */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 20px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: var(--bg-card-hover);
    border-radius: var(--radius-lg);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.stat-success .stat-value {
    color: var(--color-success);
}

.stat-error .stat-value {
    color: var(--color-error);
}

/* Results List */
.results-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.result-item {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.result-success {
    border-left: 4px solid var(--color-success);
}

.result-error {
    border-left: 4px solid var(--color-error);
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    background: var(--bg-card-hover);
    cursor: pointer;
}

.result-device {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.result-icon {
    font-size: 1.25rem;
}

.result-device-id {
    font-weight: 600;
    font-family: monospace;
}

.result-dsn,
.result-country {
    font-size: 0.85rem;
    color: var(--text-muted);
    padding: 2px 8px;
    background: var(--bg-card);
    border-radius: var(--radius-sm);
}

.result-toggle {
    padding: 8px;
    color: var(--text-muted);
    transition: transform var(--transition-fast);
}

.result-details {
    padding: 16px;
    border-top: 1px solid var(--border-color);
}

.result-stats {
    display: flex;
    gap: 20px;
    margin-bottom: 16px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.result-stats span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.result-files {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.result-error-message {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px;
    background: var(--color-error-bg);
    border-radius: var(--radius-md);
    color: var(--color-error);
}

/* =========================
   History / Reports Table
   ========================= */
.reports-table-container {
    overflow-x: auto;
}

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

.reports-table th,
.reports-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.reports-table th {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.reports-table th.sortable {
    cursor: pointer;
    user-select: none;
}

.reports-table th.sortable:hover {
    background: rgba(255, 255, 255, 0.08);
}

.reports-table th.sort-asc::after {
    content: ' ▲';
    font-size: 0.6rem;
}

.reports-table th.sort-desc::after {
    content: ' ▼';
    font-size: 0.6rem;
}

.reports-table td {
    font-size: 0.85rem;
}

.reports-table tr:hover {
    background: var(--bg-card-hover);
}

.device-id-cell {
    font-family: monospace;
    font-weight: 500;
}

.country-badge {
    display: inline-block;
    padding: 2px 8px;
    background: var(--color-purple-bg);
    color: var(--color-purple);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
}

.time-range {
    font-family: monospace;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.stats-cell {
    display: flex;
    gap: 12px;
}

.stats-cell span {
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.action-buttons {
    display: flex;
    gap: 6px;
}

/* =========================
   Empty State
   ========================= */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 4rem;
    opacity: 0.3;
    margin-bottom: 20px;
}

.empty-state h3 {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.empty-state p {
    margin-bottom: 20px;
}

/* =========================
   Flash Messages
   ========================= */
.flash-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 400px;
}

.flash {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.flash-success {
    background: var(--color-success-bg);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--color-success);
}

.flash-error {
    background: var(--color-error-bg);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--color-error);
}

.flash-info {
    background: var(--color-info-bg);
    border: 1px solid rgba(96, 165, 250, 0.3);
    color: var(--color-info);
}

.flash-warning {
    background: var(--color-warning-bg);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: var(--color-warning);
}

.flash-close {
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    padding: 4px;
    margin-left: auto;
    opacity: 0.7;
}

.flash-close:hover {
    opacity: 1;
}

/* =========================
   Modal
   ========================= */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 2000;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    max-width: 450px;
    width: 90%;
    overflow: hidden;
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
}

.modal-body {
    padding: 24px;
}

.modal-body p {
    margin-bottom: 12px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.02);
}

/* =========================
   Loading Overlay
   ========================= */
.loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 3000;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    gap: 20px;
}

.loading-overlay.active {
    display: flex;
}

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

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

/* =========================
   Footer
   ========================= */
.footer {
    text-align: center;
    padding: 20px;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--border-color);
}

/* =========================
   Utility Classes
   ========================= */
.text-center {
    text-align: center;
}

.text-success {
    color: var(--color-success) !important;
}

.text-error {
    color: var(--color-error) !important;
}

.text-warning {
    color: var(--color-warning) !important;
}

.text-muted {
    color: var(--text-muted) !important;
}

.mt-4 {
    margin-top: 24px;
}

.mb-4 {
    margin-bottom: 24px;
}

.badge {
    display: inline-block;
    padding: 4px 10px;
    background: var(--color-info-bg);
    color: var(--color-primary);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

.help-text {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 8px;
}

/* =========================
   Responsive
   ========================= */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 12px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .filter-row {
        flex-direction: column;
    }
    
    .filter-row .form-group {
        width: 100%;
    }
    
    .result-device {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .result-files {
        flex-direction: column;
    }
    
    .reports-table {
        font-size: 0.75rem;
    }
    
    .reports-table th,
    .reports-table td {
        padding: 8px 10px;
    }
}

/* Pass Matrix Styles */

.pass-matrix-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.pass-matrix-table th,
.pass-matrix-table td {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.pass-matrix-table th {
    background: var(--bg-card);
    font-weight: 600;
    white-space: nowrap;
}

.pass-matrix-table .device-id {
    font-family: monospace;
    text-align: left;
}

.pass-col {
    min-width: 80px;
    font-size: 0.75rem;
}

.pass-status {
    font-weight: 600;
    padding: 4px 8px;
}

.pass-ok {
    color: var(--color-success);
    background: rgba(46, 160, 67, 0.1);
}

.pass-fail {
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.05);
}

.timezone-section {
    margin-bottom: 2rem;
}

.timezone-header {
    font-size: 1.1rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-primary);
}

.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.help-text {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.help-text .pass-ok,
.help-text .pass-fail {
    display: inline-block;
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 0.8rem;
}