:root {
    --primary-color: #10b981;
    --primary-hover: #059669;
    --primary-light: #d1fae5;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --error-color: #ef4444;
    --bg-light: #f8fafc;
    --bg-card: #ffffff;
    --border-color: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, #14b8a6 0%, #059669 100%);
    min-height: 100vh;
}

.login-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #14b8a6 0%, #059669 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.login-box {
    background: white;
    padding: 50px 60px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 450px;
    width: 90%;
    animation: slideUp 0.4s ease-out;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.login-box h1 {
    font-size: 2em;
    background: linear-gradient(135deg, #14b8a6 0%, #059669 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 15px;
    font-weight: 700;
}

.login-box p {
    color: var(--text-secondary);
    margin-bottom: 35px;
    font-size: 1.05em;
}

.login-box .btn-large {
    padding: 16px 40px;
    font-size: 1.1em;
    width: 100%;
    background: linear-gradient(135deg, #14b8a6 0%, #059669 100%);
    border: none;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
    border-radius: 8px;
    color: white;
    cursor: pointer;
}

.login-box .btn-large:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(16, 185, 129, 0.4);
}

.login-note {
    font-size: 0.85em;
    color: #94a3b8;
    margin-top: 25px !important;
}

.container {
    max-width: 1200px;
    margin: 30px auto;
    padding: 0;
    background-color: var(--bg-card);
    min-height: calc(100vh - 60px);
    box-shadow: var(--shadow-lg);
    border-radius: 16px;
    overflow: hidden;
}

header {
    text-align: center;
    padding: 40px 30px 30px;
    background: linear-gradient(135deg, #14b8a6 0%, #059669 100%);
    color: white;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    font-weight: 700;
}

header p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1em;
}

.tabs {
    display: flex;
    gap: 0;
    background: var(--bg-light);
    padding: 0 30px;
    border-bottom: 2px solid var(--border-color);
}

.tab-button {
    padding: 16px 28px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-size: 1em;
    color: var(--text-secondary);
    transition: all 0.3s;
    font-weight: 500;
}

.tab-button:hover {
    color: var(--primary-color);
    background: rgba(37, 99, 235, 0.05);
}

.tab-button.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    font-weight: 600;
    background: white;
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s;
    padding: 40px;
}

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

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

h2 {
    color: var(--text-primary);
    margin-bottom: 10px;
    font-size: 1.8em;
    font-weight: 700;
}

h3 {
    color: var(--text-primary);
    margin-bottom: 12px;
    font-size: 1.3em;
}

.help-text {
    color: var(--text-secondary);
    margin-bottom: 30px;
    font-size: 1.05em;
}

.config-form {
    background: var(--bg-light);
    padding: 32px;
    border-radius: 12px;
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95em;
}

.form-group input[type="text"],
.form-group input[type="url"],
.form-group input[type="number"] {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1em;
    transition: all 0.2s;
    background: white;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px var(--primary-light);
}

.form-group small {
    display: block;
    margin-top: 6px;
    color: var(--text-secondary);
    font-size: 0.875em;
}

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

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 600;
}

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

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background-color: #475569;
    transform: translateY(-1px);
}

.upload-section {
    margin-bottom: 30px;
}

.file-upload-box {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 48px 40px;
    text-align: center;
    transition: all 0.3s;
    margin: 20px 0;
    background: white;
}

.file-upload-box:hover {
    border-color: var(--primary-color);
    background-color: var(--primary-light);
}

.file-upload-label {
    cursor: pointer;
    display: block;
}

.file-upload-box svg {
    color: var(--primary-color);
    margin-bottom: 15px;
}

.file-upload-box p {
    margin: 10px 0;
}

.file-upload-box strong {
    color: var(--primary-color);
}

.file-info {
    background: var(--bg-light);
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    border: 1px solid var(--border-color);
}

.format-details {
    margin-top: 20px;
}

.format-details summary {
    cursor: pointer;
    padding: 14px 16px;
    background: var(--bg-light);
    border-radius: 8px;
    font-weight: 600;
    border: 1px solid var(--border-color);
}

.format-details summary:hover {
    background: var(--primary-light);
    border-color: var(--primary-color);
}

.format-examples {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 15px;
    padding: 15px 0;
}

.format-example {
    background: white;
    padding: 20px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
}

.format-example pre {
    background: #f1f5f9;
    padding: 12px;
    border-radius: 6px;
    overflow-x: auto;
    margin-top: 10px;
    font-size: 0.875em;
    border: 1px solid var(--border-color);
}

.divider {
    text-align: center;
    margin: 40px 0;
    color: var(--text-secondary);
    position: relative;
    font-weight: 600;
}

.divider::before,
.divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 45%;
    height: 1px;
    background: var(--border-color);
}

.divider::before { left: 0; }
.divider::after { right: 0; }

.status-box {
    padding: 16px 20px;
    border-radius: 8px;
    margin: 20px 0;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

.status-box.success {
    background-color: #d1fae5;
    border: 1px solid #6ee7b7;
    color: #065f46;
}

.status-box.error {
    background-color: #fee2e2;
    border: 1px solid #fca5a5;
    color: #991b1b;
}

.status-box.info {
    background-color: #dbeafe;
    border: 1px solid #93c5fd;
    color: #1e40af;
}

.info-banner {
    padding: 14px 18px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 0.95em;
    background: linear-gradient(135deg, #e0f2fe 0%, #dbeafe 100%);
    border-left: 4px solid #3b82f6;
    color: #1e40af;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: var(--shadow-sm);
}

.info-banner i {
    font-size: 1.2em;
    color: #3b82f6;
}

footer {
    text-align: center;
    padding: 24px;
    background-color: var(--bg-light);
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

footer a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .container {
        margin: 0;
        border-radius: 0;
    }
    .tab-content { padding: 24px 20px; }
    .form-row, .format-examples { grid-template-columns: 1fr; }
    .device-mapping-container { 
        grid-template-columns: 1fr; 
    }
    .installation-selector {
        max-height: 300px;
    }
}

/* ============================================
   Installation Selector Styles
   ============================================ */
.installation-selector {
    background: var(--bg-card);
    margin: 20px 30px 20px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all 0.3s ease;
}

.installation-selector.collapsed .installation-list {
    max-height: 0;
    padding: 0;
}

.installation-selector.collapsed .selector-toggle-icon {
    transform: rotate(-90deg);
}

.selector-header {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: 16px 20px;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    user-select: none;
    transition: background 0.2s;
}

.selector-header:hover {
    background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e1 100%);
}

.selector-header i {
    color: var(--primary-color);
    font-size: 1.2em;
}

.selector-toggle-icon {
    transition: transform 0.3s ease;
    color: var(--text-secondary) !important;
    font-size: 0.9em !important;
}

.installation-list {
    max-height: 300px;
    overflow-y: auto;
    padding: 8px;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

/* Scrollbar styling */
.installation-list::-webkit-scrollbar,
.device-list::-webkit-scrollbar,
.mapping-form::-webkit-scrollbar {
    width: 8px;
}

.installation-list::-webkit-scrollbar-track,
.device-list::-webkit-scrollbar-track,
.mapping-form::-webkit-scrollbar-track {
    background: var(--bg-light);
    border-radius: 4px;
}

.installation-list::-webkit-scrollbar-thumb,
.device-list::-webkit-scrollbar-thumb,
.mapping-form::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.installation-list::-webkit-scrollbar-thumb:hover,
.device-list::-webkit-scrollbar-thumb:hover,
.mapping-form::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

.loading-installations {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
}

.installation-card {
    display: flex;
    align-items: center;
    padding: 16px 20px;
    margin: 6px 0;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
    gap: 16px;
}

.installation-card:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
    transform: translateX(4px);
}

.installation-card.selected {
    border-color: var(--primary-color);
    background: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

.installation-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5em;
    flex-shrink: 0;
}

.installation-details {
    flex: 1;
}

.installation-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.05em;
    margin-bottom: 4px;
}

.installation-id {
    font-size: 0.9em;
    color: var(--text-secondary);
}

.installation-arrow {
    color: var(--text-secondary);
    font-size: 1.2em;
    transition: transform 0.2s;
}

.installation-card:hover .installation-arrow {
    transform: translateX(4px);
}

.config-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    margin-left: 10px;
    padding: 3px 10px;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    border-radius: 12px;
    font-size: 0.75em;
    font-weight: 600;
    box-shadow: 0 2px 4px rgba(16, 185, 129, 0.3);
}

.config-badge i {
    font-size: 1em;
}

.installation-card.configured {
    border-left: 4px solid var(--primary-color);
}

/* ============================================
   Selected Installation Bar
   ============================================ */
.selected-installation-bar {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: white;
    padding: 12px 20px;
    margin: 0 30px 20px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-md);
    animation: slideDown 0.3s ease-out;
}

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

.installation-bar-content {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95em;
}

.installation-bar-content i {
    font-size: 1.2em;
}

.installation-bar-content strong {
    font-weight: 700;
}

.selected-installation-bar .btn-icon {
    color: white;
    background: rgba(255, 255, 255, 0.2);
}

.selected-installation-bar .btn-icon:hover {
    background: rgba(255, 255, 255, 0.3);
    color: white;
}

/* ============================================
   Please Select Message
   ============================================ */
.please-select-message {
    text-align: center;
    padding: 80px 40px;
    color: var(--text-secondary);
}

.please-select-message p {
    font-size: 1.1em;
    margin-top: 16px;
}

/* ============================================
   Device Mapping Interface
   ============================================ */
.device-mapping-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 20px;
}

.device-column,
.mapping-column {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    max-height: 600px;
}

.column-header {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: 16px 20px;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.column-header i {
    color: var(--primary-color);
    margin-right: 8px;
}

.btn-icon {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 6px 10px;
    border-radius: 6px;
    transition: all 0.2s;
}

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

.search-box {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 10px;
    background: white;
}

.search-box i {
    color: var(--text-secondary);
}

.search-box input {
    flex: 1;
    border: 2px solid var(--border-color);
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 0.95em;
    transition: all 0.2s;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.device-list {
    max-height: 500px;
    overflow-y: auto;
    padding: 8px;
}

.loading-devices {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
}

.device-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    margin: 4px 0;
    background: var(--bg-light);
    border: 2px solid transparent;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
}

.device-item:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
    transform: translateX(4px);
}

.device-item.selected {
    border-color: var(--primary-color);
    background: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

.device-info {
    flex: 1;
}

.device-display-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.device-sensor-name {
    font-size: 0.85em;
    color: var(--text-secondary);
    font-family: 'Courier New', monospace;
    margin-bottom: 4px;
}

.device-location {
    font-size: 0.85em;
    color: var(--text-secondary);
    margin-top: 4px;
}

.device-location i {
    margin-right: 4px;
}

.device-type {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
}

.type-badge,
.unit-badge {
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.75em;
    font-weight: 600;
    text-transform: uppercase;
}

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

.unit-badge {
    background: var(--bg-light);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.mapping-form {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
}

.selected-device {
    margin-bottom: 20px;
}

.selected-device strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: 8px;
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.form-actions .btn {
    flex: 1;
}

.no-selection {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 40px;
    flex: 1;
    overflow-y: auto;
    color: var(--text-secondary);
    text-align: center;
}

.no-selection p {
    margin-top: 16px;
    font-size: 1.05em;
}

/* Manual section updates */
.manual-section {
    background: var(--bg-light);
    padding: 28px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

/* ============================================
   Selected Devices Section
   ============================================ */
.selected-devices-section {
    background: var(--bg-light);
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
}

.selected-devices-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
    min-height: 40px;
}

.selected-device-chip {
    display: flex;
    align-items: center;
    gap: 8px;
    background: white;
    border: 2px solid var(--primary-color);
    border-radius: 8px;
    padding: 8px 12px;
    transition: all 0.2s;
    animation: chipFadeIn 0.2s ease-out;
}

@keyframes chipFadeIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

.selected-device-chip:hover {
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
    transform: translateY(-1px);
}

.chip-content {
    flex: 1;
}

.chip-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9em;
    line-height: 1.3;
}

.chip-sensor-id {
    font-size: 0.75em;
    color: var(--text-secondary);
    font-family: 'Courier New', monospace;
    margin-top: 2px;
}

.chip-remove {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px 6px;
    border-radius: 4px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chip-remove:hover {
    background: var(--error-color);
    color: white;
}

.chip-remove i {
    font-size: 0.8em;
}

/* Existing Mappings Display */
.existing-mappings-section {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.existing-mappings-header {
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-color);
}

.existing-mappings-header h3 {
    color: var(--text-primary);
    font-size: 1.1em;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.existing-mappings-header h3 i {
    color: var(--primary-color);
}

.existing-mappings-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.stream-mapping-card {
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px;
    transition: all 0.2s;
}

.stream-mapping-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.stream-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.stream-id-badge {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: white;
    padding: 6px 12px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9em;
    display: flex;
    align-items: center;
    gap: 6px;
}

.stream-count {
    color: var(--text-secondary);
    font-size: 0.85em;
    font-weight: 500;
}

.stream-sensors {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.sensor-chip {
    background: white;
    border: 1px solid var(--border-color);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.85em;
    color: var(--text-primary);
    font-family: 'Courier New', monospace;
}

.btn-icon-small {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 6px 8px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    font-size: 0.85em;
}

.btn-icon-small:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: var(--primary-light);
}

.btn-delete-stream:hover {
    border-color: var(--error-color);
    color: var(--error-color);
    background: #fee;
}

.btn-edit-stream:hover {
    border-color: #f59e0b;
    color: #f59e0b;
    background: #fef3c7;
}