/* Environor Inc. - Professional CSS Stylesheet */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #004080;
    --secondary-color: #0066cc;
    --accent-color: #00a3e0;
    --light-bg: #f8f9fa;
    --dark-text: #1a1a1a;
    --light-text: #ffffff;
    --border-color: #d0d0d0;
    --success-color: #27ae60;
    --warning-color: #f39c12;
}

html, body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-text);
    background-color: var(--light-bg);
}

/* Header & Navigation */
header {
    background-color: var(--primary-color);
    color: var(--light-text);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 40px;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    font-size: 28px;
    font-weight: bold;
    color: var(--light-text);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    height: 40px;
    width: auto;
}

.contact-info {
    display: flex;
    gap: 30px;
    font-size: 14px;
}

.contact-info a {
    color: var(--light-text);
    text-decoration: none;
    transition: color 0.3s;
}

.contact-info a:hover {
    color: var(--accent-color);
}

/* Navigation Menu */
nav {
    background-color: var(--primary-color);
    padding: 0;
}

nav ul {
    list-style: none;
    display: flex;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

nav li {
    position: relative;
}

nav a {
    display: block;
    padding: 15px 20px;
    color: var(--light-text);
    text-decoration: none;
    transition: background-color 0.3s, color 0.3s;
}

nav a:hover {
    background-color: var(--secondary-color);
    color: var(--accent-color);
}

/* Dropdown Menu */
.dropdown {
    position: relative;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: var(--secondary-color);
    min-width: 250px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
    z-index: 1;
    top: 100%;
    left: 0;
}

.dropdown-content a {
    color: var(--light-text);
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.dropdown-content a:last-child {
    border-bottom: none;
}

.dropdown-content a:hover {
    background-color: var(--primary-color);
}

.dropdown:hover .dropdown-content {
    display: block;
}

/* Main Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0, 51, 102, 0.85), rgba(0, 102, 204, 0.85)),
                url('../images/hero/water_treatment_facility_1.jpg') center/cover no-repeat;
    color: var(--light-text);
    padding: 140px 40px;
    text-align: center;
    margin-bottom: 60px;
    min-height: 650px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, transparent 0%, rgba(0, 51, 102, 0.3) 100%);
}

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

.hero h1 {
    font-size: 56px;
    margin-bottom: 25px;
    font-weight: bold;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
    letter-spacing: -0.5px;
}

.hero p {
    font-size: 24px;
    margin-bottom: 40px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.5);
    font-weight: 300;
    line-height: 1.5;
}

.hero .btn {
    display: inline-block;
    padding: 15px 40px;
    background-color: var(--accent-color);
    color: var(--light-text);
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s;
    margin: 10px;
    font-weight: 600;
    font-size: 16px;
    box-shadow: 0 4px 15px rgba(0, 163, 224, 0.3);
}

.hero .btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 163, 224, 0.5);
}

/* Main Content */
main {
    min-height: calc(100vh - 200px);
    padding: 40px 0;
}

.content-section {
    margin-bottom: 60px;
}

.section-title {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 30px;
    text-align: center;
    border-bottom: 3px solid var(--accent-color);
    padding-bottom: 15px;
}

.section-subtitle {
    font-size: 24px;
    color: var(--secondary-color);
    margin-bottom: 20px;
    margin-top: 30px;
}

/* Grid Layout */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.grid-item {
    background-color: var(--light-text);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.grid-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.grid-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.grid-item-content {
    padding: 20px;
}

.grid-item h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 20px;
}

.grid-item p {
    color: #666;
    font-size: 14px;
    line-height: 1.6;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 25px;
    background-color: var(--secondary-color);
    color: var(--light-text);
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s;
    border: none;
    cursor: pointer;
    font-size: 14px;
}

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

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

.btn-secondary {
    background-color: var(--accent-color);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--secondary-color);
    color: var(--secondary-color);
}

.btn-outline:hover {
    background-color: var(--secondary-color);
    color: var(--light-text);
}

/* Cards */
.card {
    background-color: var(--light-text);
    border-radius: 8px;
    padding: 30px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    border-left: 4px solid var(--accent-color);
}

.card h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
}

.card p {
    color: #666;
    line-height: 1.8;
}

/* Features Section */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.feature {
    text-align: center;
    padding: 30px;
    background-color: var(--light-text);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.feature-icon {
    font-size: 48px;
    color: var(--accent-color);
    margin-bottom: 15px;
}

.feature-icon svg {
    stroke: var(--accent-color);
}

.feature h4 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.feature p {
    color: #666;
    font-size: 14px;
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: var(--light-text);
    padding: 40px;
    margin-top: 60px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1400px;
    margin: 0 auto;
    margin-bottom: 30px;
}

.footer-section h4 {
    margin-bottom: 15px;
    color: var(--accent-color);
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section a {
    color: var(--light-text);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: var(--accent-color);
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.2);
    padding-top: 20px;
    font-size: 14px;
}

/* Breadcrumb */
.breadcrumb {
    padding: 15px 40px;
    background-color: var(--light-bg);
    font-size: 14px;
    max-width: 1400px;
    margin: 0 auto;
}

.breadcrumb a {
    color: var(--secondary-color);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background-color: var(--light-text);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

table th {
    background-color: var(--primary-color);
    color: var(--light-text);
    padding: 15px;
    text-align: left;
}

table td {
    padding: 12px 15px;
    border-bottom: 1px solid var(--border-color);
}

table tr:hover {
    background-color: var(--light-bg);
}

/* Forms */
form {
    background-color: var(--light-text);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    max-width: 600px;
}

form label {
    display: block;
    margin-bottom: 5px;
    color: var(--primary-color);
    font-weight: 500;
}

form input,
form textarea,
form select {
    width: 100%;
    padding: 10px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-family: inherit;
    font-size: 14px;
}

form input:focus,
form textarea:focus,
form select:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 5px rgba(0, 102, 204, 0.3);
}

form button {
    background-color: var(--secondary-color);
    color: var(--light-text);
    padding: 12px 30px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}

form button:hover {
    background-color: var(--primary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-top {
        flex-direction: column;
        gap: 15px;
        padding: 15px;
    }

    nav ul {
        flex-direction: column;
        padding: 0;
    }

    nav a {
        padding: 12px 15px;
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }

    .container {
        padding: 0 20px;
    }

    .hero {
        padding: 60px 20px;
    }

    .hero h1 {
        font-size: 32px;
    }

    .hero p {
        font-size: 16px;
    }

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

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

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

    .contact-info {
        flex-direction: column;
        gap: 10px;
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.mt-40 {
    margin-top: 40px;
}

.mb-40 {
    margin-bottom: 40px;
}

.p-20 {
    padding: 20px;
}

.p-40 {
    padding: 40px;
}

.hidden {
    display: none;
}

.visible {
    display: block;
}

/* Page-specific styles */
.about-intro {
    background-color: var(--light-text);
    padding: 40px;
    border-radius: 8px;
    margin-bottom: 40px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.about-intro h2 {
    color: var(--primary-color);
    margin-bottom: 20px;
}

.timeline {
    position: relative;
    padding: 20px 0;
}

.timeline-item {
    padding-left: 40px;
    margin-bottom: 30px;
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 20px;
    height: 20px;
    background-color: var(--accent-color);
    border-radius: 50%;
    border: 3px solid var(--primary-color);
}

.timeline-item::after {
    content: '';
    position: absolute;
    left: 8px;
    top: 20px;
    width: 4px;
    height: 30px;
    background-color: var(--accent-color);
}

.timeline-item:last-child::after {
    display: none;
}

.timeline-item h4 {
    color: var(--primary-color);
    margin-bottom: 5px;
}

.timeline-item p {
    color: #666;
}

/* Image Gallery */
.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.gallery-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s;
}

.gallery-item:hover img {
    transform: scale(1.1);
}

/* Alert Messages */
.alert {
    padding: 15px 20px;
    margin-bottom: 20px;
    border-radius: 5px;
    border-left: 4px solid;
}

.alert-success {
    background-color: #d4edda;
    border-color: var(--success-color);
    color: #155724;
}

.alert-warning {
    background-color: #fff3cd;
    border-color: var(--warning-color);
    color: #856404;
}

.alert-info {
    background-color: #d1ecf1;
    border-color: var(--accent-color);
    color: #0c5460;
}

/* Print Styles */
@media print {
    header, nav, footer {
        display: none;
    }

    .container {
        max-width: 100%;
    }
}