/* ============================================================
   CactusPLC - ESP32 Monitoring Dashboard
   Cactus Brand Design System
   ============================================================ */

/* ----- CSS Variables ----- */
:root {
    --cactus-primary: #E75B12;
    --cactus-primary-dark: #C94D0E;
    --cactus-primary-light: #FF7A3D;
    --cactus-bg-light: #F4F5F7;
    --cactus-bg-card: #FFFFFF;
    --cactus-bg-subtle: #FAFBFC;
    --cactus-bg-hover: #EBECF0;
    --cactus-text-primary: #172B4D;
    --cactus-text-secondary: #6B778C;
    --cactus-text-muted: #97A0AF;
    --cactus-border: #DFE1E6;
    --cactus-shadow-sm: 0 1px 3px rgba(9, 30, 66, 0.12);
    --cactus-shadow-md: 0 3px 6px rgba(9, 30, 66, 0.15);

    --color-positive: #36B37E;
    --color-negative: #DE350B;
    --color-warning: #FFAB00;
    --color-info: #0065FF;

    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --radius-sm: 4px;
    --radius-md: 8px;
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

body.body--dark {
    --cactus-bg-light: #121212;
    --cactus-bg-card: #1E1E1E;
    --cactus-bg-subtle: #2A2A2A;
    --cactus-bg-hover: #333333;
    --cactus-text-primary: #E0E0E0;
    --cactus-text-secondary: #A0A0A0;
    --cactus-text-muted: #707070;
    --cactus-border: #333333;
    --cactus-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
    --cactus-shadow-md: 0 3px 6px rgba(0, 0, 0, 0.5);
}

/* ----- Reset / Base ----- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: 14px;
    line-height: 1.5;
    color: var(--cactus-text-primary);
    background-color: var(--cactus-bg-light);
    min-height: 100vh;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* ----- Scrollbar (dark mode) ----- */
body.body--dark ::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

body.body--dark ::-webkit-scrollbar-track {
    background: var(--cactus-bg-subtle);
}

body.body--dark ::-webkit-scrollbar-thumb {
    background: var(--cactus-bg-hover);
    border-radius: 4px;
}

body.body--dark ::-webkit-scrollbar-thumb:hover {
    background: var(--cactus-text-muted);
}

/* ----- Header ----- */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: var(--cactus-primary);
    color: #FFFFFF;
    padding: 0 24px;
    height: 56px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.header__left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header__icon {
    flex-shrink: 0;
}

.header__title {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.header__right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.header__status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    opacity: 0.9;
}

.header__status-text {
    white-space: nowrap;
}

.header__toggle-dark {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.15);
    color: #FFFFFF;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.header__toggle-dark:hover {
    background-color: rgba(255, 255, 255, 0.25);
}

/* Sun/Moon toggle icons */
.icon-moon {
    display: none;
}

body.body--dark .icon-sun {
    display: none;
}

body.body--dark .icon-moon {
    display: block;
}

/* ----- Status Dot ----- */
.status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.status-dot--online {
    background-color: var(--color-positive);
    box-shadow: 0 0 6px rgba(54, 179, 126, 0.5);
}

.status-dot--offline {
    background-color: var(--color-negative);
}

.status-dot--fault {
    background-color: var(--color-warning);
}

.status-dot--ws-connected {
    background-color: var(--color-positive);
    box-shadow: 0 0 6px rgba(54, 179, 126, 0.5);
}

/* ----- Main ----- */
.main {
    padding: 24px;
    width: 100%;
}

/* ----- Section ----- */
.section {
    margin-bottom: 32px;
}

.section__header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.section__title {
    font-size: 18px;
    font-weight: 600;
    color: var(--cactus-text-primary);
}

/* ----- Badge ----- */
.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    border-radius: 12px;
    padding: 2px 10px;
    line-height: 1.4;
}

.badge--count {
    background-color: var(--cactus-primary);
    color: #FFFFFF;
    min-width: 24px;
}

.badge--severity {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    padding: 2px 8px;
}

.badge--info {
    background-color: rgba(0, 101, 255, 0.12);
    color: var(--color-info);
}

.badge--warning {
    background-color: rgba(255, 171, 0, 0.15);
    color: #946200;
}

body.body--dark .badge--warning {
    color: var(--color-warning);
}

.badge--error {
    background-color: rgba(231, 91, 18, 0.12);
    color: var(--cactus-primary);
}

.badge--critical {
    background-color: rgba(222, 53, 11, 0.12);
    color: var(--color-negative);
}

/* ----- Devices Grid ----- */
.devices-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

@media (max-width: 1200px) {
    .devices-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .devices-grid {
        grid-template-columns: 1fr;
    }

    .main {
        padding: 16px;
    }
}

/* ----- Card ----- */
.card {
    background-color: var(--cactus-bg-card);
    border: 1px solid var(--cactus-border);
    border-radius: var(--radius-md);
    box-shadow: var(--cactus-shadow-sm);
    padding: 16px;
    transition: box-shadow var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-normal);
}

.card:hover {
    box-shadow: var(--cactus-shadow-md);
}

.card__subtitle {
    font-size: 15px;
    font-weight: 600;
    color: var(--cactus-text-primary);
    margin-bottom: 14px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--cactus-border);
}

/* ----- Device Card ----- */
.device-card {
    background-color: var(--cactus-bg-card);
    border: 1px solid var(--cactus-border);
    border-radius: var(--radius-md);
    box-shadow: var(--cactus-shadow-sm);
    padding: 16px;
    transition: box-shadow var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-normal);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.device-card:hover {
    box-shadow: var(--cactus-shadow-md);
}

.device-card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.device-card__name {
    font-size: 15px;
    font-weight: 600;
    color: var(--cactus-text-primary);
}

.device-card__status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 500;
}

.device-card__status--online {
    color: var(--color-positive);
}

.device-card__status--offline {
    color: var(--color-negative);
}

.device-card__status--fault {
    color: var(--color-warning);
}

.device-card__info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px 12px;
}

.device-card__info-item {
    display: flex;
    flex-direction: column;
}

.device-card__info-label {
    font-size: 11px;
    font-weight: 500;
    color: var(--cactus-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.device-card__info-value {
    font-size: 13px;
    color: var(--cactus-text-secondary);
}

.device-card__actions {
    display: flex;
    gap: 8px;
    margin-top: 4px;
    padding-top: 10px;
    border-top: 1px solid var(--cactus-border);
}

/* ----- Buttons ----- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    font-family: var(--font-family);
    font-size: 13px;
    font-weight: 500;
    line-height: 1.4;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background-color var(--transition-fast), box-shadow var(--transition-fast), opacity var(--transition-fast);
    white-space: nowrap;
}

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

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

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

.btn--primary:active:not(:disabled) {
    background-color: var(--cactus-primary-dark);
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.2);
}

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

.btn--secondary:hover:not(:disabled) {
    background-color: var(--cactus-border);
}

.btn--small {
    padding: 4px 10px;
    font-size: 12px;
}

.btn--ghost {
    background: transparent;
    color: var(--cactus-text-secondary);
    padding: 4px 10px;
    font-size: 12px;
}

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

.btn--danger {
    background-color: var(--color-negative);
    color: #FFFFFF;
}

.btn--danger:hover:not(:disabled) {
    background-color: #BF2600;
}

.btn--ota {
    background-color: var(--cactus-primary-light);
    color: #FFFFFF;
    padding: 4px 10px;
    font-size: 12px;
}

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

/* ----- Faults ----- */
.faults-list {
    background-color: var(--cactus-bg-card);
    border: 1px solid var(--cactus-border);
    border-radius: var(--radius-md);
    box-shadow: var(--cactus-shadow-sm);
    max-height: 400px;
    overflow-y: auto;
    transition: background-color var(--transition-normal);
}

.fault-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--cactus-border);
    transition: background-color var(--transition-fast);
}

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

.fault-item:hover {
    background-color: var(--cactus-bg-subtle);
}

.fault-item__content {
    flex: 1;
    min-width: 0;
}

.fault-item__top {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 4px;
}

.fault-item__device {
    font-weight: 600;
    font-size: 13px;
    color: var(--cactus-text-primary);
}

.fault-item__code {
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 12px;
    color: var(--cactus-text-secondary);
    background-color: var(--cactus-bg-hover);
    padding: 1px 6px;
    border-radius: 3px;
}

.fault-item__time {
    font-size: 12px;
    color: var(--cactus-text-muted);
    margin-left: auto;
}

.fault-item__message {
    font-size: 13px;
    color: var(--cactus-text-secondary);
    line-height: 1.4;
}

.fault-item__actions {
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.fault-item--acknowledged {
    opacity: 0.55;
}

/* ----- Table ----- */
.table-wrapper {
    overflow-x: auto;
}

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

.table th {
    text-align: left;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--cactus-text-muted);
    padding: 10px 12px;
    border-bottom: 2px solid var(--cactus-border);
}

.table td {
    padding: 10px 12px;
    font-size: 13px;
    color: var(--cactus-text-secondary);
    border-bottom: 1px solid var(--cactus-border);
}

.table tbody tr {
    transition: background-color var(--transition-fast);
}

.table tbody tr:hover {
    background-color: var(--cactus-bg-subtle);
}

.table__empty-row td {
    text-align: center;
    color: var(--cactus-text-muted);
    padding: 24px 12px;
}

/* ----- Forms ----- */
.form-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.form-row > .form-group {
    flex: 1;
    min-width: 200px;
}

.form-group {
    margin-bottom: 14px;
}

.form-label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--cactus-text-secondary);
    margin-bottom: 4px;
}

.form-input {
    display: block;
    width: 100%;
    padding: 8px 12px;
    font-family: var(--font-family);
    font-size: 13px;
    color: var(--cactus-text-primary);
    background-color: var(--cactus-bg-subtle);
    border: 1px solid var(--cactus-border);
    border-radius: var(--radius-sm);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-normal);
    outline: none;
}

.form-input:focus {
    border-color: var(--cactus-primary);
    box-shadow: 0 0 0 3px rgba(231, 91, 18, 0.15);
}

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

.form-input--file {
    padding: 6px;
}

.form-input--file::file-selector-button {
    font-family: var(--font-family);
    font-size: 12px;
    font-weight: 500;
    padding: 4px 12px;
    border: 1px solid var(--cactus-border);
    border-radius: var(--radius-sm);
    background-color: var(--cactus-bg-hover);
    color: var(--cactus-text-primary);
    cursor: pointer;
    margin-right: 8px;
    transition: background-color var(--transition-fast);
}

.form-input--file::file-selector-button:hover {
    background-color: var(--cactus-border);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236B778C' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    padding-right: 30px;
}

.form-textarea {
    resize: vertical;
    min-height: 40px;
}

.form-actions {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

/* ----- Upload Progress ----- */
.upload-progress {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
}

.upload-progress__bar {
    flex: 1;
    height: 6px;
    background-color: var(--cactus-bg-hover);
    border-radius: 3px;
    overflow: hidden;
}

.upload-progress__fill {
    height: 100%;
    width: 0%;
    background-color: var(--cactus-primary);
    border-radius: 3px;
    transition: width 200ms ease;
}

.upload-progress__text {
    font-size: 12px;
    font-weight: 600;
    color: var(--cactus-text-secondary);
    min-width: 36px;
    text-align: right;
}

/* ----- Empty State ----- */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 24px;
    color: var(--cactus-text-muted);
    text-align: center;
    grid-column: 1 / -1;
}

.empty-state svg {
    margin-bottom: 12px;
    opacity: 0.4;
}

.empty-state p {
    font-size: 14px;
}

.empty-state__hint {
    font-size: 12px;
    margin-top: 4px;
}

/* ----- Modal ----- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(9, 30, 66, 0.54);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    padding: 24px;
    animation: fadeIn 150ms ease;
}

body.body--dark .modal-overlay {
    background-color: rgba(0, 0, 0, 0.7);
}

.modal-overlay[hidden] {
    display: none;
}

.modal {
    background-color: var(--cactus-bg-card);
    border: 1px solid var(--cactus-border);
    border-radius: var(--radius-md);
    box-shadow: var(--cactus-shadow-md);
    width: 100%;
    max-width: 460px;
    animation: slideUp 200ms ease;
}

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

.modal__title {
    font-size: 16px;
    font-weight: 600;
    color: var(--cactus-text-primary);
}

.modal__close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    font-size: 22px;
    color: var(--cactus-text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.modal__close:hover {
    background-color: var(--cactus-bg-hover);
    color: var(--cactus-text-primary);
}

.modal__body {
    padding: 20px;
}

.modal__result {
    padding: 20px;
}

.modal__result-title {
    font-weight: 600;
    color: var(--color-positive);
    margin-bottom: 14px;
    font-size: 14px;
}

.modal__apikey-box {
    margin-bottom: 16px;
}

.apikey-display {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 6px;
    background-color: var(--cactus-bg-subtle);
    border: 1px solid var(--cactus-border);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
}

.apikey-display code {
    flex: 1;
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 13px;
    color: var(--cactus-text-primary);
    word-break: break-all;
}

/* ----- FAB ----- */
.fab {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: none;
    background-color: var(--cactus-primary);
    color: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(231, 91, 18, 0.35);
    transition: background-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
    z-index: 50;
}

.fab:hover {
    background-color: var(--cactus-primary-dark);
    box-shadow: 0 6px 16px rgba(231, 91, 18, 0.45);
    transform: scale(1.05);
}

.fab:active {
    transform: scale(0.95);
}

/* ----- Toast Notifications ----- */
.toast-container {
    position: fixed;
    top: 72px;
    right: 24px;
    z-index: 300;
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 380px;
    width: 100%;
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 16px;
    background-color: var(--cactus-bg-card);
    border: 1px solid var(--cactus-border);
    border-radius: var(--radius-md);
    box-shadow: var(--cactus-shadow-md);
    animation: slideInRight 250ms ease;
    pointer-events: auto;
    transition: opacity 200ms ease, transform 200ms ease;
}

.toast--removing {
    opacity: 0;
    transform: translateX(100%);
}

.toast__icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    color: #FFFFFF;
}

.toast--success .toast__icon {
    background-color: var(--color-positive);
}

.toast--error .toast__icon {
    background-color: var(--color-negative);
}

.toast--warning .toast__icon {
    background-color: var(--color-warning);
}

.toast--info .toast__icon {
    background-color: var(--color-info);
}

.toast__content {
    flex: 1;
    min-width: 0;
}

.toast__message {
    font-size: 13px;
    color: var(--cactus-text-primary);
    word-wrap: break-word;
}

.toast__close {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    border: none;
    background: transparent;
    color: var(--cactus-text-muted);
    cursor: pointer;
    font-size: 16px;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background-color var(--transition-fast);
}

.toast__close:hover {
    background-color: var(--cactus-bg-hover);
}

/* ----- OTA Section ----- */
.ota-upload {
    margin-bottom: 16px;
}

#firmware-list-card {
    margin-bottom: 16px;
}

/* ----- Loading Skeleton ----- */
.skeleton {
    background: linear-gradient(90deg, var(--cactus-bg-hover) 25%, var(--cactus-bg-subtle) 50%, var(--cactus-bg-hover) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
}

.skeleton--card {
    height: 180px;
    border-radius: var(--radius-md);
}

/* ----- Animations ----- */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ----- Responsive ----- */
@media (max-width: 600px) {
    .header {
        padding: 0 16px;
    }

    .header__title {
        font-size: 17px;
    }

    .header__status-text {
        display: none;
    }

    .main {
        padding: 12px;
    }

    .section__title {
        font-size: 16px;
    }

    .form-row {
        flex-direction: column;
        gap: 0;
    }

    .form-row > .form-group {
        min-width: unset;
    }

    .fault-item {
        flex-direction: column;
        gap: 8px;
    }

    .fault-item__actions {
        align-self: flex-end;
    }

    .fault-item__time {
        margin-left: 0;
    }

    .toast-container {
        right: 12px;
        left: 12px;
        max-width: unset;
    }
}