/* GENERAL STYLING & VARIABLES */
:root {
    --bg-primary: #f0f6fc;
    --bg-gradient: linear-gradient(135deg, #e3f2fd 0%, #edf4fc 50%, #f6f9fc 100%);
    --pastel-blue-dark: #2c445e;
    --pastel-blue-medium: #6f95c5;
    --pastel-blue-light: #adc7e7;
    --pastel-blue-soft: #dbebfa;
    --pastel-teal: #8ec3d8;
    --pastel-teal-light: #e0f2f7;
    --pastel-warning: #f7b7a3;
    --pastel-success: #aadebf;
    --pastel-success-dark: #3b8c66;
    --pastel-warning-dark: #ba5e45;
    --text-main: #2b394a;
    --text-muted: #5e7087;
    --card-bg: rgba(255, 255, 255, 0.75);
    --card-border: 1px solid rgba(255, 255, 255, 0.6);
    --card-shadow: 0 8px 32px 0 rgba(142, 174, 206, 0.15);
    --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

html {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background-color: var(--bg-primary);
    background-image: var(--bg-gradient);
    min-height: 100vh;
    color: var(--text-main);
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    padding-bottom: 40px;
}

/* BACKGROUND WAVES ANIMATION */
.bg-decoration {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 15vh;
    z-index: -1;
    opacity: 0.5;
    pointer-events: none;
    overflow: hidden;
}

.wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 200%;
    height: 100%;
    background-repeat: repeat no-repeat;
    background-position: 0 bottom;
    transform-origin: center bottom;
}

.wave1 {
    background-image: url('data:image/svg+xml;utf8,<svg viewBox="0 0 1200 120" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="none"><path d="M0,60 C150,100 350,20 500,60 C650,100 850,20 1000,60 C1150,100 1300,60 1400,60 L1400,120 L0,120 Z" fill="%23adc7e7" opacity="0.4"/></svg>');
    background-size: 50% 100px;
    animation: waveAnim 20s linear infinite;
}

.wave2 {
    background-image: url('data:image/svg+xml;utf8,<svg viewBox="0 0 1200 120" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="none"><path d="M0,50 C150,10 300,90 450,50 C600,10 750,90 900,50 C1050,10 1200,50 1350,50 L1350,120 L0,120 Z" fill="%23dbebfa" opacity="0.6"/></svg>');
    background-size: 50% 120px;
    animation: waveAnimDouble 15s linear infinite;
    bottom: -10px;
}

@keyframes waveAnim {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

@keyframes waveAnimDouble {
    0% { transform: translateX(-50%); }
    100% { transform: translateX(0); }
}

/* TOP NAVBAR */
.topnav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: var(--card-border);
    box-shadow: 0 4px 20px rgba(165, 186, 206, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.water-icon {
    width: 38px;
    height: 38px;
    background-color: var(--pastel-blue-soft);
    color: var(--pastel-blue-medium);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: 0 4px 10px rgba(111, 149, 197, 0.15);
    animation: pulseWater 3s infinite ease-in-out;
}

@keyframes pulseWater {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.06); }
}

.topnav h1 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--pastel-blue-dark);
    display: flex;
    align-items: center;
    gap: 8px;
}

.topnav h1 .badge {
    font-size: 0.65rem;
    font-weight: 600;
    background-color: var(--pastel-blue-medium);
    color: white;
    padding: 3px 8px;
    border-radius: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* AUTHENTICATION BAR */
#authentication-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.user-details {
    font-weight: 600;
    color: var(--pastel-blue-dark);
}

.logout-btn {
    text-decoration: none;
    color: var(--pastel-warning-dark);
    background-color: var(--pastel-warning);
    padding: 6px 12px;
    border-radius: 20px;
    font-weight: 500;
    transition: var(--transition-smooth);
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.logout-btn:hover {
    background-color: #f7a58d;
    transform: translateY(-1px);
}

/* LOGIN WRAPPER & FORM */
.login-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-grow: 1;
    padding: 40px 20px;
}

.login-form {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: var(--card-border);
    border-radius: 24px;
    box-shadow: var(--card-shadow);
    width: 100%;
    max-width: 420px;
    padding: 35px;
    animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.header-icon {
    font-size: 2.8rem;
    color: var(--pastel-blue-medium);
    margin-bottom: 15px;
    filter: drop-shadow(0 4px 6px rgba(111, 149, 197, 0.2));
}

.login-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--pastel-blue-dark);
    margin-bottom: 8px;
}

.login-header p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.input-group {
    margin-bottom: 20px;
    text-align: left;
}

.input-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--pastel-blue-dark);
    margin-bottom: 8px;
}

.input-group input {
    width: 100%;
    padding: 12px 16px;
    font-family: inherit;
    font-size: 0.9rem;
    background-color: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(173, 199, 231, 0.5);
    border-radius: 12px;
    color: var(--text-main);
    transition: var(--transition-smooth);
    outline: none;
}

.input-group input:focus {
    border-color: var(--pastel-blue-medium);
    background-color: #fff;
    box-shadow: 0 0 0 4px rgba(111, 149, 197, 0.15);
}

.btn-primary {
    width: 100%;
    background-color: var(--pastel-blue-medium);
    color: white;
    padding: 14px;
    border: none;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
    margin-top: 10px;
    box-shadow: 0 4px 15px rgba(111, 149, 197, 0.3);
}

.btn-primary:hover {
    background-color: #5d84b5;
    box-shadow: 0 6px 20px rgba(111, 149, 197, 0.4);
    transform: translateY(-1px);
}

.error-text {
    color: var(--pastel-warning-dark);
    font-size: 0.8rem;
    margin-top: 12px;
    text-align: center;
    background-color: rgba(247, 183, 163, 0.2);
    padding: 8px;
    border-radius: 8px;
    display: none;
}

.error-text:not(:empty) {
    display: block;
}

/* CONTENT CONTAINER */
.content-sign-in {
    max-width: 1100px;
    width: 100%;
    margin: 0 auto;
    padding: 30px 20px;
    flex-grow: 1;
}

/* DASHBOARD HEADER INFO */
.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 25px;
}

.update-info {
    font-size: 0.85rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.5);
    padding: 8px 16px;
    border-radius: 20px;
    border: var(--card-border);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

#lastUpdate {
    font-weight: 600;
    color: var(--text-main);
}

.view-controls {
    display: flex;
    align-items: center;
    gap: 15px;
    background: rgba(255, 255, 255, 0.5);
    padding: 6px 16px;
    border-radius: 20px;
    border: var(--card-border);
}

.control-label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
}

/* CUSTOM CHECKBOX */
.custom-checkbox {
    display: inline-flex;
    align-items: center;
    position: relative;
    padding-left: 22px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-main);
    user-select: none;
}

.custom-checkbox input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    position: absolute;
    left: 0;
    height: 16px;
    width: 16px;
    background-color: rgba(255, 255, 255, 0.8);
    border: 1px solid var(--pastel-blue-light);
    border-radius: 4px;
    transition: var(--transition-smooth);
}

.custom-checkbox:hover input ~ .checkmark {
    border-color: var(--pastel-blue-medium);
}

.custom-checkbox input:checked ~ .checkmark {
    background-color: var(--pastel-blue-medium);
    border-color: var(--pastel-blue-medium);
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
}

.custom-checkbox input:checked ~ .checkmark:after {
    display: block;
}

.custom-checkbox .checkmark:after {
    left: 5px;
    top: 2px;
    width: 4px;
    height: 8px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

/* CARDS ROW */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: var(--card-border);
    border-radius: 20px;
    padding: 24px;
    box-shadow: var(--card-shadow);
    display: flex;
    align-items: center;
    gap: 20px;
    transition: var(--transition-smooth);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(142, 174, 206, 0.25);
}

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    box-shadow: inset 0 -4px 10px rgba(0,0,0,0.05);
}

.card-temp .card-icon {
    background-color: var(--pastel-teal-light);
    color: #4a9ebc;
}

.card-turb .card-icon {
    background-color: var(--pastel-blue-soft);
    color: var(--pastel-blue-medium);
}

.card-status .card-icon {
    background-color: rgba(170, 223, 191, 0.3);
    color: var(--pastel-success-dark);
}

.card-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex-grow: 1;
    text-align: left;
}

.card-title {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.reading {
    font-family: 'Quicksand', sans-serif;
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--pastel-blue-dark);
    line-height: 1.1;
}

.reading .unit {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-left: 2px;
}

.status-text {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.6rem;
    color: var(--text-main);
}

.card-badge {
    display: inline-block;
    align-self: flex-start;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 20px;
    background-color: rgba(0,0,0,0.04);
    color: var(--text-muted);
    margin-top: 4px;
}

/* GAUGES CONTAINER */
.gauges-container {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.gauge-card {
    background: var(--card-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: var(--card-border);
    border-radius: 20px;
    padding: 24px;
    box-shadow: var(--card-shadow);
    flex: 1 1 350px;
    max-width: 480px;
    text-align: center;
}

.gauge-card h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--pastel-blue-dark);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.gauge-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 310px;
}

/* CHARTS SECTION */
.charts-range-bar {
    background: var(--card-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: var(--card-border);
    border-radius: 12px;
    padding: 12px 24px;
    margin-bottom: 20px;
    box-shadow: var(--card-shadow);
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--pastel-blue-dark);
}

.charts-range-bar input {
    width: 70px;
    padding: 6px 10px;
    border-radius: 8px;
    border: 1px solid var(--pastel-blue-light);
    outline: none;
    font-family: inherit;
    font-weight: 600;
    color: var(--text-main);
    text-align: center;
}

.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

@media (max-width: 550px) {
    .charts-grid {
        grid-template-columns: 1fr;
    }
}

.chart-card {
    background: var(--card-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: var(--card-border);
    border-radius: 20px;
    padding: 24px;
    box-shadow: var(--card-shadow);
}

.chart-card h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--pastel-blue-dark);
    margin-bottom: 15px;
    text-align: left;
    display: flex;
    align-items: center;
    gap: 8px;
}

.chart-container {
    width: 100%;
    height: 320px;
    border-radius: 12px;
    overflow: hidden;
}

/* ACTIONS BAR */
.actions-bar {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 35px;
    flex-wrap: wrap;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    outline: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 12px;
    font-weight: 600;
    transition: var(--transition-smooth);
}

.btn-secondary {
    background-color: var(--pastel-blue-soft);
    color: var(--pastel-blue-dark);
    padding: 12px 24px;
    font-size: 0.9rem;
    box-shadow: 0 4px 10px rgba(111, 149, 197, 0.1);
}

.btn-secondary:hover {
    background-color: var(--pastel-blue-light);
    transform: translateY(-1px);
}

.btn-danger {
    background-color: var(--pastel-warning);
    color: var(--pastel-warning-dark);
    padding: 12px 24px;
    font-size: 0.9rem;
    box-shadow: 0 4px 10px rgba(186, 94, 69, 0.1);
}

.btn-danger:hover {
    background-color: #f7a58d;
    transform: translateY(-1px);
}

/* DATA TABLE */
.table-card {
    background: var(--card-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: var(--card-border);
    border-radius: 20px;
    padding: 24px;
    box-shadow: var(--card-shadow);
    margin-bottom: 30px;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.table-card h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--pastel-blue-dark);
    margin-bottom: 20px;
    text-align: left;
    display: flex;
    align-items: center;
    gap: 8px;
}

.table-responsive {
    overflow-x: auto;
    border-radius: 12px;
    border: 1px solid rgba(173, 199, 231, 0.3);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    text-align: left;
}

th {
    background-color: var(--pastel-blue-soft);
    color: var(--pastel-blue-dark);
    font-weight: 700;
    padding: 14px 18px;
    border-bottom: 2px solid rgba(173, 199, 231, 0.4);
}

td {
    padding: 12px 18px;
    border-bottom: 1px solid rgba(173, 199, 231, 0.2);
    color: var(--text-main);
}

tr:last-child td {
    border-bottom: none;
}

tr:nth-child(even) {
    background-color: rgba(255, 255, 255, 0.3);
}

tr:hover {
    background-color: rgba(173, 199, 231, 0.15);
}

.table-footer {
    display: flex;
    justify-content: center;
    margin-top: 15px;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.8rem;
    border-radius: 8px;
}

/* DELETE MODAL */
.modal {
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(44, 68, 94, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.modal-content {
    background: var(--card-bg);
    border: var(--card-border);
    border-radius: 24px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
    width: 100%;
    max-width: 450px;
    padding: 30px;
    position: relative;
    animation: scaleUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

.close {
    position: absolute;
    right: 20px;
    top: 15px;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition-smooth);
}

.close:hover {
    color: var(--pastel-warning-dark);
}

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

.warning-icon {
    font-size: 3rem;
    color: var(--pastel-warning-dark);
    margin-bottom: 20px;
}

.modal-body h2 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--pastel-blue-dark);
    margin-bottom: 10px;
}

.modal-body p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: 25px;
}

.modal-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
}

.btn-cancel {
    background-color: var(--pastel-blue-soft);
    color: var(--pastel-blue-dark);
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 600;
}

.btn-cancel:hover {
    background-color: var(--pastel-blue-light);
}

.btn-confirm-delete {
    background-color: var(--pastel-warning-dark);
    color: white;
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(186, 94, 69, 0.2);
}

.btn-confirm-delete:hover {
    background-color: #a44830;
    box-shadow: 0 6px 16px rgba(186, 94, 69, 0.3);
}

/* UTILITY CLASS FOR STATUSES */
.status-clear {
    color: var(--pastel-success-dark);
    background-color: rgba(170, 223, 191, 0.25);
}

.status-cloudy {
    color: #a2723a;
    background-color: rgba(243, 203, 160, 0.25);
}

.status-dirty {
    color: var(--pastel-warning-dark);
    background-color: rgba(247, 183, 163, 0.25);
}

/* RESPONSIVE DESIGN */
@media (max-width: 768px) {
    .topnav {
        flex-direction: column;
        gap: 15px;
        text-align: center;
        padding: 15px;
    }

    #authentication-bar {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }

    .dashboard-header {
        flex-direction: column;
        align-items: stretch;
    }

    .update-info {
        justify-content: center;
    }

    .view-controls {
        justify-content: center;
    }
}

/* THINGSBOARD INTEGRATION STYLES */
.thingsboard-section {
    margin-bottom: 30px;
}

.thingsboard-card {
    display: flex;
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    text-align: center;
}

.thingsboard-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--pastel-blue-dark);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.thingsboard-subtext {
    font-size: 0.85rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

.thingsboard-body {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    margin-top: 10px;
}

.btn-thingsboard {
    background-color: var(--pastel-blue-medium);
    color: white;
    padding: 14px 28px;
    border: none;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-smooth);
    box-shadow: 0 4px 15px rgba(111, 149, 197, 0.3);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-thingsboard:hover {
    background-color: #5d84b5;
    box-shadow: 0 6px 20px rgba(111, 149, 197, 0.4);
    transform: translateY(-2px);
}

.server-status-container {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.4);
    padding: 6px 16px;
    border-radius: 20px;
    border: var(--card-border);
}

.server-status-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 700;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
    background-color: #bdc3c7; /* default grey */
}

/* Green dot for online status */
.server-online .status-dot {
    background-color: #2ecc71;
    box-shadow: 0 0 8px #2ecc71;
    animation: statusPulse 2s infinite ease-in-out;
}

/* Red dot for offline status */
.server-offline .status-dot {
    background-color: #e74c3c;
    box-shadow: 0 0 8px #e74c3c;
}

@keyframes statusPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}