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

:root {
    --primary: #4F46E5;
    --primary-dark: #4338CA;
    --secondary: #10B981;
    --dark: #1F2937;
    --light: #F9FAFB;
    --danger: #EF4444;
    --warning: #F59E0B;
    --gray: #6B7280;
    --gray-light: #E5E7EB;
    --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--dark);
    line-height: 1.6;
}

/* Navbar Styles */
.navbar {
    background: white;
    box-shadow: var(--shadow);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo i {
    color: var(--primary);
    font-size: 1.75rem;
}

.logo span .highlight {
    color: var(--primary);
}

.nav-menu {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-menu a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: color 0.3s;
}

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

.nav-buttons {
    display: flex;
    gap: 1rem;
}

.btn-login,
.btn-register {
    padding: 0.5rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-login {
    color: var(--primary);
    border: 2px solid var(--primary);
}

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

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

.btn-register:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--dark);
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    padding: 8rem 2rem 5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.hero-container {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: linear-gradient(135deg, #fff 0%, #e0e7ff 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-content p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.btn-primary,
.btn-secondary {
    padding: 0.75rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid white;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
}

.hero-stats {
    display: flex;
    gap: 2rem;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.9;
}

.hero-image img {
    width: 100%;
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
}

/* Features Section */
.features {
    padding: 5rem 2rem;
    background: var(--light);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.highlight {
    color: var(--primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.feature-card i {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--gray);
}

/* Pricing Section */
.pricing {
    padding: 5rem 2rem;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1280px;
    margin: 0 auto;
}

.pricing-card {
    background: white;
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
    position: relative;
}

.pricing-card.popular {
    border: 2px solid var(--primary);
    transform: scale(1.05);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    padding: 0.25rem 1rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
}

.pricing-header {
    text-align: center;
    margin-bottom: 2rem;
}

.price {
    margin: 1rem 0;
}

.currency {
    font-size: 1.5rem;
    font-weight: 600;
    vertical-align: top;
}

.amount {
    font-size: 3rem;
    font-weight: 700;
}

.period {
    font-size: 1rem;
    color: var(--gray);
}

.pricing-features {
    list-style: none;
    margin-bottom: 2rem;
}

.pricing-features li {
    padding: 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pricing-features i.fa-check {
    color: var(--secondary);
}

.pricing-features i.fa-times {
    color: var(--danger);
}

.btn-pricing {
    display: block;
    text-align: center;
    padding: 0.75rem;
    background: var(--primary);
    color: white;
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 600;
    transition: background 0.3s;
}

.btn-pricing:hover {
    background: var(--primary-dark);
}

/* Footer */
footer {
    background: var(--dark);
    color: white;
    padding: 3rem 2rem 1rem;
}

.footer-container {
    max-width: 1280px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-about .logo {
    margin-bottom: 1rem;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    color: white;
    font-size: 1.25rem;
    transition: color 0.3s;
}

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

.footer-links h4 {
    margin-bottom: 1rem;
}

.footer-links ul {
    list-style: none;
}

.footer-links a {
    color: var(--gray-light);
    text-decoration: none;
    line-height: 2;
    transition: color 0.3s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--gray-light);
}

/* Auth Pages */
.auth-page {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.auth-container {
    max-width: 1200px;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: white;
    border-radius: 1.5rem;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.auth-card {
    padding: 3rem;
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header .logo {
    justify-content: center;
    margin-bottom: 1rem;
}

.auth-header h2 {
    margin-bottom: 0.5rem;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 500;
}

.input-icon {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon i:first-child {
    position: absolute;
    left: 1rem;
    color: var(--gray);
}

.input-icon input,
.plan-select {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border: 1px solid var(--gray-light);
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.input-icon input:focus,
.plan-select:focus {
    outline: none;
    border-color: var(--primary);
}

.toggle-password {
    position: absolute;
    right: 1rem;
    cursor: pointer;
    color: var(--gray);
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.forgot-password {
    color: var(--primary);
    text-decoration: none;
    font-size: 0.875rem;
}

.btn-submit {
    background: var(--primary);
    color: white;
    padding: 0.75rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

.btn-submit:hover {
    background: var(--primary-dark);
}

.auth-footer {
    text-align: center;
    font-size: 0.875rem;
}

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

.auth-divider {
    text-align: center;
    position: relative;
    margin: 1rem 0;
}

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

.auth-divider::before {
    left: 0;
}

.auth-divider::after {
    right: 0;
}

.auth-divider span {
    background: white;
    padding: 0 1rem;
    color: var(--gray);
}

.social-auth {
    display: flex;
    gap: 1rem;
}

.btn-google,
.btn-github {
    flex: 1;
    padding: 0.75rem;
    border: 1px solid var(--gray-light);
    background: white;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: background 0.3s;
    font-weight: 500;
}

.btn-google:hover,
.btn-github:hover {
    background: var(--light);
}

.auth-info {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.info-content {
    text-align: center;
}

.info-content i {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.info-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.info-features {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 2rem;
}

.info-features span {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.benefits {
    margin-top: 2rem;
    text-align: left;
}

.benefit {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

/* Dashboard Styles */
.dashboard-page {
    background: var(--light);
}

.dashboard-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: white;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--gray-light);
}

.sidebar-nav {
    flex: 1;
    padding: 1.5rem 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: var(--gray);
    text-decoration: none;
    transition: all 0.3s;
}

.nav-item:hover {
    background: var(--light);
    color: var(--primary);
}

.nav-item.active {
    background: var(--light);
    color: var(--primary);
    border-right: 3px solid var(--primary);
}

.sidebar-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--gray-light);
}

.tenant-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

.logout-btn {
    width: 100%;
    padding: 0.5rem;
    background: none;
    border: 1px solid var(--danger);
    color: var(--danger);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.3s;
}

.logout-btn:hover {
    background: var(--danger);
    color: white;
}

.dashboard-main {
    flex: 1;
    margin-left: 260px;
}

.dashboard-header {
    background: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
}

.header-search {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--light);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
}

.header-search input {
    border: none;
    background: none;
    outline: none;
    width: 250px;
}

.header-user {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.page-content {
    padding: 2rem;
    display: none;
}

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

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow);
}

.stat-icon {
    width: 50px;
    height: 50px;
    background: var(--light);
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--primary);
}

.stat-info h3 {
    font-size: 0.875rem;
    color: var(--gray);
    margin-bottom: 0.25rem;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.stat-change {
    font-size: 0.75rem;
}

.stat-change.positive {
    color: var(--secondary);
}

.stat-change.negative {
    color: var(--danger);
}

.stat-change.neutral {
    color: var(--warning);
}

.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.chart-card {
    background: white;
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
}

.chart-card canvas {
    max-height: 300px;
}

.devices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.device-card {
    background: white;
    padding: 1.5rem;
    border-radius: 1rem;
    text-align: center;
    transition: transform 0.3s;
}

.device-card:hover {
    transform: translateY(-5px);
}

.device-card i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.device-status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    font-size: 0.75rem;
}

.device-status.online {
    background: rgba(16, 185, 129, 0.1);
    color: var(--secondary);
}

.device-status.offline {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.device-status.online .status-dot {
    background: var(--secondary);
}

.device-status.offline .status-dot {
    background: var(--danger);
}

/* Responsive */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: 2rem;
        box-shadow: var(--shadow);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-buttons {
        display: none;
    }

    .hero-container,
    .auth-container {
        grid-template-columns: 1fr;
    }

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

    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
        z-index: 1000;
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .dashboard-main {
        margin-left: 0;
    }

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

    .pricing-card.popular {
        transform: scale(1);
    }

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