/* --- Global Styles & Variables --- */
:root {
    --primary-color: #4F46E5;
    --secondary-color: #6B7280;
    --background-color: #F9FAFB;
    --surface-color: #FFFFFF;
    --text-color: #111827;
    --font-family: 'Inter', sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    margin: 0;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

h1, h2, h3 {
    line-height: 1.2;
    font-weight: 600;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; color: var(--primary-color); }
h3 { font-size: 1.25rem; }

section {
    padding: 60px 20px;
    text-align: center;
}

/* --- Components --- */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

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

.btn-secondary {
    background-color: var(--surface-color);
    color: var(--primary-color);
    border: 1px solid #E5E7EB;
}

.btn-icon {
    background: none;
    border: none;
    color: var(--secondary-color);
    cursor: pointer;
    font-size: 1.1rem;
    transition: color 0.2s;
}

.btn-icon:hover {
    color: #EF4444;
}

/* --- Header & Navigation --- */
.main-header {
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px); /* Safari support */
    border-bottom: 1px solid #E5E7EB;
    padding: 0 20px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    height: 70px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-links {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 25px;
    margin: 0;
    padding: 0;
}

.nav-links a {
    text-decoration: none;
    color: var(--secondary-color);
    font-weight: 600;
    position: relative;
    transition: color 0.3s ease;
}

.nav-links a:not(.btn):hover {
    color: var(--primary-color);
}

.nav-links a:not(.btn)::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-links a:not(.btn):hover::after {
    width: 100%;
}

/* --- Features Section --- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 40px auto 0;
    text-align: left;
}

.feature-card {
    background: var(--surface-color);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.feature-card.interactive-card {
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    border: 1px solid transparent;
}

.feature-card.interactive-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
    border-color: var(--primary-color);
}

/* --- Landing Page Specific Styles --- */
.landing-header {
    background-color: var(--surface-color);
    padding: 0 20px;
    border-bottom: 1px solid #E5E7EB;
}

.landing-navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    height: 70px;
}

.landing-nav-links {
    display: flex;
    gap: 15px;
}

.landing-hero {
    text-align: center;
    padding: 140px 20px 120px;
    background-color: var(--background-color);
    position: relative;
    overflow: hidden;
}

/* --- Animated Background Shapes --- */
.bg-shape {
    position: absolute;
    filter: blur(80px);
    z-index: 0;
    opacity: 0.4;
    animation: floatShape 10s infinite alternate ease-in-out;
    border-radius: 50%;
    will-change: transform;
}

.shape-1 {
    top: -10%; left: -10%; width: 500px; height: 500px;
    background: var(--primary-color);
}
.shape-2 {
    bottom: -20%; right: -10%; width: 600px; height: 600px;
    background: #10B981;
    animation-delay: -5s;
    animation-duration: 12s;
}
.shape-3 {
    top: 30%; left: 50%; width: 400px; height: 400px;
    background: #F59E0B;
    animation-delay: -2s;
    animation-duration: 9s;
}

@keyframes floatShape {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(40px, -60px) scale(1.1); }
}

.hero-content {
    position: relative;
    z-index: 1;
}

.landing-hero h1 {
    font-size: 4rem;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #10B981 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
    letter-spacing: -1px;
}

.landing-hero p {
    font-size: 1.25rem;
    color: var(--secondary-color);
    max-width: 650px;
    margin: 0 auto 40px;
}

/* --- Animated CTA Button --- */
@keyframes heroBtnPulse {
    0% { box-shadow: 0 0 0 0 rgba(79, 70, 229, 0.4); }
    70% { box-shadow: 0 0 0 20px rgba(79, 70, 229, 0); }
    100% { box-shadow: 0 0 0 0 rgba(79, 70, 229, 0); }
}

#hero-cta-btn {
    animation: heroBtnPulse 2s infinite;
    transition: transform 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
}

#hero-cta-btn:hover {
    animation: none;
    transform: translateY(-3px) scale(1.05);
    background-color: #4338ca;
    box-shadow: 0 10px 25px rgba(79, 70, 229, 0.5);
}

.landing-features {
    padding: 80px 20px;
    background-color: var(--surface-color);
}

/* --- Enhancing Feature Cards on Landing Page --- */
.landing-features .feature-card {
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.4s ease, border-color 0.4s ease;
    border: 1px solid transparent;
}

.landing-features .feature-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.08);
    border-color: var(--primary-color);
}

.landing-features .feature-card i {
    transition: transform 0.4s ease;
}

.landing-features .feature-card:hover i {
    transform: scale(1.2) rotate(10deg);
}

/* --- Demo Section --- */
.demo-section {
    background-color: var(--background-color);
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 40px auto 0;
}

.chart-container {
    background: var(--surface-color);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    position: relative; /* Essential for Chart.js responsiveness */
    height: 400px; /* Give the container a defined height */
}

/* --- Footer --- */
.main-footer {
    text-align: center;
    padding: 20px;
    font-size: 0.9rem;
    color: var(--secondary-color);
    border-top: 1px solid #E5E7EB;
}

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

/* --- Authentication View Styles --- */
#auth-view {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.auth-container {
    width: 100%;
    max-width: 450px;
    padding: 20px;
}

.auth-card {
    background: var(--surface-color);
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.auth-logo {
    text-align: center;
    color: var(--primary-color);
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.auth-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    border: 1px solid #E5E7EB;
    border-radius: 8px;
    margin-bottom: 30px;
}

.auth-tab-link {
    padding: 12px;
    border: none;
    background: transparent;
    cursor: pointer;
    font-weight: 600;
    color: var(--secondary-color);
    font-size: 1rem;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.auth-tab-link.active {
    background-color: var(--primary-color);
    color: white;
}

.auth-tab-link:first-child {
    border-top-left-radius: 7px;
    border-bottom-left-radius: 7px;
}
.auth-tab-link:last-child {
    border-top-right-radius: 7px;
    border-bottom-right-radius: 7px;
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

.auth-form p {
    text-align: center;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.text-link {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    transition: opacity 0.2s ease;
}

.text-link:hover {
    opacity: 0.8;
    text-decoration: underline;
}

.forgot-password-link-container {
    text-align: right;
    margin-top: 8px;
}

.back-to-login-container {
    text-align: center;
    margin-top: 20px;
}

.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="tel"],
.form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid #E5E7EB;
    border-radius: 8px;
    font-size: 1rem;
    box-sizing: border-box;
    font-family: var(--font-family);
}

.btn.full-width {
    width: 100%;
    text-align: center;
}

.profile-radio-group {
    display: flex;
    gap: 20px;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-weight: normal !important;
}

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

.form-message {
    color: #EF4444; /* Red for errors */
    font-size: 0.9rem;
    margin-top: 15px;
    text-align: center;
    min-height: 1em;
}

/* --- Loading View Styles --- */
#loading-view {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.spinner {
    width: 45px;
    height: 45px;
    border: 4px solid #E5E7EB;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

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

/* --- Animations --- */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
    will-change: opacity, transform; /* Performance hint for the browser */
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered animation delays for hero and grid items */
.features-grid .animate-on-scroll:nth-child(2),
.dashboard-grid .animate-on-scroll:nth-child(2) {
    transition-delay: 150ms;
}
.features-grid .animate-on-scroll:nth-child(3) {
    transition-delay: 300ms;
}

.hidden {
    display: none !important;
}

/* --- Dashboard Specific Styles --- */
.dashboard-wrapper {
    display: flex;
    min-height: 100vh;
    background-color: var(--background-color);
}

.sidebar {
    width: 250px;
    background-color: var(--surface-color);
    border-right: 1px solid #E5E7EB;
    display: flex;
    flex-direction: column;
    padding: 20px 0;
    z-index: 10;
}

.sidebar-logo {
    padding: 0 20px 20px;
    border-bottom: 1px solid #E5E7EB;
    margin-bottom: 10px;
    /* Inherits .logo styles, so we only add what's unique */
}

.sidebar-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-logout {
    margin-top: auto;
    border-top: 1px solid #E5E7EB;
    padding-top: 10px;
}

.sidebar-menu li a {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.2s, color 0.2s, border-right 0.2s, transform 0.2s ease;
    border-right: 3px solid transparent;
}

.sidebar-menu li a:hover, .sidebar-menu li a.active {
    background-color: #EEF2FF;
    color: var(--primary-color);
    border-right-color: var(--primary-color);
    transform: translateX(4px);
}

.sidebar-menu i {
    margin-right: 15px;
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

/* --- Hide Features button from Dashboard Sidebar --- */
.sidebar-menu a[href="#features"] {
    display: none !important;
}

.dashboard-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

.dashboard-header {
    height: 70px;
    background-color: var(--surface-color);
    border-bottom: 1px solid #E5E7EB;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
    position: sticky;
    top: 0;
    z-index: 5;
}

.search-bar {
    position: relative;
    display: flex;
    align-items: center;
}

.search-bar i {
    position: absolute;
    left: 14px;
    color: var(--secondary-color);
}

.search-bar input {
    padding: 10px 10px 10px 40px;
    border: 1px solid #E5E7EB;
    border-radius: 20px;
    width: 300px;
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    font-family: var(--font-family);
}

.search-bar input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 25px;
}

.notification-bell {
    position: relative;
    color: var(--secondary-color);
    font-size: 1.25rem;
    cursor: pointer;
    transition: color 0.2s;
}

@keyframes bellRing {
    0%, 100% { transform: rotate(0deg); }
    20%, 60% { transform: rotate(15deg); }
    40%, 80% { transform: rotate(-15deg); }
}

.notification-bell:hover {
    color: var(--primary-color);
    animation: bellRing 0.6s ease-in-out;
    transform-origin: top center;
}

.notification-bell::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 8px;
    height: 8px;
    background-color: #EF4444;
    border-radius: 50%;
    border: 2px solid var(--surface-color);
}

.profile-menu-container {
    position: relative;
}

.profile-dropdown {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-color);
}

.profile-img {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.profile-img img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.profile-chevron {
    font-size: 0.8rem;
    color: var(--secondary-color);
    transition: transform 0.2s ease;
}

.profile-dropdown.active .profile-chevron {
    transform: rotate(180deg);
}

.profile-menu {
    display: none;
    position: absolute;
    top: calc(100% + 15px);
    right: 0;
    background-color: var(--surface-color);
    min-width: 180px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    border: 1px solid #E5E7EB;
    border-radius: 8px;
    padding: 10px 0;
    list-style: none;
    margin: 0;
    z-index: 100;
}

.profile-menu.show {
    display: block;
    animation: fadeIn 0.2s ease;
}

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

.profile-menu li a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.9rem;
    transition: background-color 0.2s;
}

.profile-menu li a:hover {
    background-color: var(--background-color);
    color: var(--primary-color);
}

.profile-menu .logout-link {
    border-top: 1px solid #E5E7EB;
    margin-top: 5px;
    padding-top: 5px;
}

.profile-menu .logout-link a {
    color: #EF4444;
}

.profile-menu .logout-link a:hover {
    background-color: #FEE2E2;
}

.dashboard-content {
    padding: 30px;
    flex: 1;
    overflow-y: auto;
}

.dashboard-section {
    padding: 0;
    text-align: left;
    margin-bottom: 40px;
    /* Resetting section defaults for this specific use case */
    padding-top: 0;
    padding-bottom: 0;
}

.metrics-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.metric-card {
    background: var(--surface-color);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.03);
    border: 1px solid #E5E7EB;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.metric-card[data-interactive="true"] {
    cursor: pointer;
}

.metric-card:hover, .central-chart-section:hover, .chart-box:hover, .table-box:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.08);
}

.metric-card::before {
    content: ''; position: absolute; top: 0; left: 0; width: 4px; height: 100%;
    background: var(--primary-color); transform: scaleY(0); transition: transform 0.3s ease; transform-origin: bottom;
}
.metric-card:hover::before { transform: scaleY(1); }

.metric-title {
    color: var(--secondary-color);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.metric-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 15px;
}

.sparkline-container {
    height: 45px;
    width: 100%;
    position: relative;
}

.metric-progress-bg {
    background-color: #E5E7EB;
    border-radius: 4px;
    height: 6px;
    width: 100%;
    margin-top: 10px;
    overflow: hidden;
}

.metric-progress-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.5s ease-out;
}

.central-chart-section {
    background: var(--surface-color);
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.03);
    border: 1px solid #E5E7EB;
    margin-bottom: 30px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.central-chart-container {
    position: relative;
    height: 350px;
    width: 100%;
}

.bottom-split {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 25px;
}

.chart-box, .table-box {
    background: var(--surface-color);
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.03);
    border: 1px solid #E5E7EB;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    animation: dashboardSlideIn 0.5s ease-out 0.6s both;
}

.table-box { animation-delay: 0.7s; }

.chart-box-container {
    position: relative;
    height: 280px;
    width: 100%;
    display: flex;
    justify-content: center;
}

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

.data-table tbody tr {
    transition: background-color 0.2s ease;
}

.data-table tbody tr:hover {
    background-color: rgba(243, 244, 246, 0.6);
}

.data-table th, .data-table td {
    text-align: left;
    padding: 15px 10px;
    border-bottom: 1px solid #E5E7EB;
}

.data-table th {
    color: var(--secondary-color);
    font-weight: 600;
    font-size: 0.9rem;
}

.data-table th.sortable {
    cursor: pointer;
    transition: color 0.2s ease;
}

.data-table th.sortable:hover {
    color: var(--primary-color);
}

.status-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.status-completed { background-color: #D1FAE5; color: #065F46; }
.status-pending { background-color: #FEF3C7; color: #92400E; }
.status-failed { background-color: #FEE2E2; color: #991B1B; }

/* --- Responsive Design --- */
@media (max-width: 768px) {
    .dashboard-wrapper {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid #E5E7EB;
        padding: 10px 0;
    }

    .sidebar-menu {
        display: flex;
        overflow-x: auto;
        white-space: nowrap;
        padding-bottom: 5px;
    }

    .sidebar-menu li a {
        border-right: none;
        border-bottom: 3px solid transparent;
        padding: 10px 20px;
    }

    .sidebar-menu li a:hover, .sidebar-menu li a.active {
        border-right-color: transparent;
        border-bottom-color: var(--primary-color);
    }

    .dashboard-header {
        flex-direction: column;
        height: auto;
        padding: 15px 20px;
        gap: 15px;
        align-items: stretch;
    }

    .search-bar input {
        width: 100%;
        box-sizing: border-box;
    }

    .header-actions {
        justify-content: space-between;
    }

    .metrics-row {
        grid-template-columns: 1fr 1fr;
    }

    .bottom-split {
        grid-template-columns: 1fr;
    }

    .dashboard-content {
        padding: 15px;
    }

    h1 { font-size: 2.5rem; }
    h2 { font-size: 1.75rem; }

    .landing-hero { padding: 100px 20px 60px; }
    .landing-hero h1 { font-size: 2.8rem; }
    .landing-hero p { font-size: 1rem; }

    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

/* --- Modal Styles --- */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.modal-content {
    background-color: var(--surface-color);
    padding: 40px;
    border-radius: 16px;
    width: 100%;
    max-width: 450px;
    position: relative;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    transform: translateY(0);
    transition: transform 0.3s ease;
}

.modal.hidden .modal-content {
    transform: translateY(-20px);
}

.close-modal {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 1.75rem;
    cursor: pointer;
    color: var(--secondary-color);
    transition: color 0.2s;
}

@keyframes alertPulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.7; }
    100% { transform: scale(1); opacity: 1; }
}

.alert-icon {
    display: inline-block;
    animation: alertPulse 2s infinite;
}

/* --- Back to Top Button --- */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
    z-index: 999;
    transition: opacity 0.3s ease, transform 0.3s ease, background-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transform: translateY(20px);
}

.back-to-top.show {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: #4338ca;
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 6px 16px rgba(79, 70, 229, 0.4);
}

body.dark-mode .back-to-top {
    box-shadow: 0 4px 12px rgba(0,0,0,0.5);
}

.close-modal:hover {
    color: var(--text-color);
}

.profile-pic-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
}

.profile-pic-preview {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    overflow: hidden;
}

.profile-pic-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.btn-small {
    padding: 6px 12px;
    font-size: 0.85rem;
}

/* --- Settings Modal Specifics --- */
.settings-modal-content {
    max-width: 800px;
    max-height: 85vh;
    overflow-y: auto;
}

.settings-layout {
    display: flex;
    gap: 30px;
    margin-top: 20px;
}

.settings-sidebar {
    width: 200px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    border-right: 1px solid #E5E7EB;
    padding-right: 20px;
}

.settings-tab-btn {
    background: transparent;
    border: none;
    text-align: left;
    padding: 10px 15px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--secondary-color);
    cursor: pointer;
    border-radius: 8px;
    transition: background-color 0.2s, color 0.2s;
}

.settings-tab-btn:hover {
    background-color: var(--background-color);
}

.settings-tab-btn.active {
    background-color: #EEF2FF;
    color: var(--primary-color);
}

.settings-content-area {
    flex: 1;
}

.settings-tab-content.hidden {
    display: none;
}

.security-info {
    background: #F3F4F6;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.device-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.device-list li {
    padding: 15px 0;
    border-bottom: 1px solid #E5E7EB;
    color: var(--text-color);
}

.device-list li i {
    margin-right: 10px;
    color: var(--secondary-color);
}

.device-list li small {
    color: var(--secondary-color);
    margin-left: 25px;
}

.theme-options {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 20px;
}

/* --- Dark Mode Overrides --- */
body.dark-mode {
    --background-color: #111827;
    --surface-color: #1F2937;
    --text-color: #F9FAFB;
    --secondary-color: #9CA3AF;
    --primary-color: #6366F1;
}

body.dark-mode .settings-tab-btn.active,
body.dark-mode .sidebar-menu li a:hover, 
body.dark-mode .sidebar-menu li a.active {
    background-color: #374151;
}

body.dark-mode .metric-progress-bg {
    background-color: #4B5563;
}

body.dark-mode .search-bar input,
body.dark-mode .form-group input,
body.dark-mode select {
    background-color: #374151;
    color: var(--text-color);
    border-color: #4B5563;
}

body.dark-mode .metric-card, body.dark-mode .central-chart-section,
body.dark-mode .chart-box, body.dark-mode .table-box,
body.dark-mode .sidebar, body.dark-mode .dashboard-header,
body.dark-mode .auth-card, body.dark-mode .modal-content,
body.dark-mode .feature-card, body.dark-mode .profile-menu,
body.dark-mode .auth-tabs,
body.dark-mode .settings-sidebar, body.dark-mode .main-footer {
    border-color: #374151;
}

body.dark-mode .data-table th, body.dark-mode .data-table td,
body.dark-mode .device-list li {
    border-color: #374151;
}

body.dark-mode .data-table tbody tr:hover {
    background-color: rgba(75, 85, 99, 0.4);
}

body.dark-mode .bg-shape {
    opacity: 0.25; /* Soften shapes slightly for dark backgrounds */
}

body.dark-mode .landing-hero h1 {
    background: linear-gradient(135deg, #818cf8 0%, #34d399 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

body.dark-mode .security-info {
    background-color: #374151;
}

@media (max-width: 600px) {
    .settings-layout { flex-direction: column; }
    .settings-sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid #E5E7EB;
        padding-right: 0;
        padding-bottom: 20px;
        flex-direction: row;
        overflow-x: auto;
    }
    .settings-tab-btn { white-space: nowrap; }
}

/* --- Toast Notifications --- */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.toast {
    background-color: var(--surface-color);
    border-left: 4px solid #10B981;
    box-shadow: 0 4px 15px rgba(0,0,0,0.15);
    padding: 15px 20px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-width: 250px;
    transform: translateX(150%);
    transition: transform 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.toast.show {
    transform: translateX(0);
}

.toast-message {
    font-weight: 600;
    color: var(--text-color);
    font-size: 0.95rem;
}

.toast-close {
    cursor: pointer;
    color: var(--secondary-color);
    font-size: 1.5rem;
    line-height: 1;
    background: none;
    border: none;
    padding: 0;
    margin-left: 20px;
    transition: color 0.2s;
}

.toast-close:hover {
    color: var(--text-color);
}

/* --- Pure CSS Tooltips --- */
[data-tooltip] { position: relative; cursor: help; }
[data-tooltip]::before {
    content: attr(data-tooltip);
    position: absolute; bottom: calc(100% + 8px); left: 50%; transform: translateX(-50%) translateY(4px);
    padding: 6px 12px; background: var(--text-color); color: var(--surface-color);
    border-radius: 6px; font-size: 0.75rem; font-weight: 600; white-space: nowrap;
    opacity: 0; visibility: hidden; transition: all 0.2s cubic-bezier(0.68, -0.55, 0.265, 1.55); z-index: 100;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    pointer-events: none;
}
[data-tooltip]::after {
    content: ''; position: absolute; bottom: calc(100% + 2px); left: 50%; transform: translateX(-50%) translateY(4px);
    border-width: 6px; border-style: solid; border-color: var(--text-color) transparent transparent transparent;
    opacity: 0; visibility: hidden; transition: all 0.2s cubic-bezier(0.68, -0.55, 0.265, 1.55); z-index: 100;
}
[data-tooltip]:hover::before, [data-tooltip]:hover::after {
    opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0);
}

/* --- Skeleton Loading Animations --- */
@keyframes shimmer {
    0% { background-position: -1000px 0; }
    100% { background-position: 1000px 0; }
}

.skeleton {
    background: #e2e8f0;
    background-image: linear-gradient(90deg, #e2e8f0 0px, #f8fafc 40px, #e2e8f0 80px);
    background-size: 1000px 100%;
    animation: shimmer 2.5s infinite linear forwards;
    border-radius: 6px;
}

body.dark-mode .skeleton {
    background: #374151;
    background-image: linear-gradient(90deg, #374151 0px, #4B5563 40px, #374151 80px);
}

.skeleton-text { height: 14px; width: 100%; margin-bottom: 8px; }
.skeleton-chart { height: 250px; width: 100%; margin-top: 15px; }

/* --- Custom Scrollbars --- */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background-color: #CBD5E1;
    border-radius: 10px;
}

body.dark-mode ::-webkit-scrollbar-thumb {
    background-color: #4B5563;
}

/* --- Accessibility --- */
*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* --- Print Styles --- */
@media print {
    .sidebar, .main-header, .dashboard-header, .back-to-top, .toast-container, .settings-sidebar {
        display: none !important;
    }
    .dashboard-wrapper, .dashboard-main, .dashboard-content {
        display: block;
        overflow: visible;
        height: auto;
    }
    .chart-box, .table-box, .central-chart-section, .metric-card {
        box-shadow: none;
        page-break-inside: avoid; /* Prevents charts from splitting across pages */
    }
}