/* ===================================
   NIRHYDRO THEME - MAIN STYLESHEET
   =================================== */

/* ===== COLOR PALETTE ===== */
:root {
    --primary-blue: #0066CC;
    --dark-blue: #003366;
    --light-blue: #E6F0FF;
    --accent-green: #28A745;
    --text-dark: #1A1A1A;
    --text-light: #666666;
    --text-muted: #999999;
    --border-light: #E0E0E0;
    --border-dark: #CCCCCC;
    --bg-light: #F8F9FA;
    --bg-white: #FFFFFF;
    --shadow-soft: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-large: 0 8px 24px rgba(0, 0, 0, 0.2);
}

/* ===== GLOBAL STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--dark-blue);
}

/* ===== TYPOGRAPHY ===== */
h1 {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 1.2rem;
    color: var(--text-dark);
}

h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: var(--text-dark);
}

h5, h6 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

p {
    margin-bottom: 1rem;
    color: var(--text-light);
    line-height: 1.7;
}

/* ===== BUTTONS ===== */
.btn, button, input[type="button"], input[type="submit"] {
    display: inline-block;
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--primary-blue);
    color: var(--bg-white);
    box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
    background-color: var(--dark-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

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

.btn-secondary:hover {
    background-color: #218838;
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

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

.btn-outline:hover {
    background-color: var(--primary-blue);
    color: var(--bg-white);
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

.btn-sm {
    padding: 0.5rem 1.25rem;
    font-size: 0.9rem;
}

/* ===== HEADER & NAVIGATION ===== */
header {
    background-color: var(--bg-white);
    border-bottom: 1px solid var(--border-light);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-soft);
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo img {
    max-width: 150px;
    height: auto;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
}

.header-contact {
    display: flex;
    gap: 2rem;
    align-items: center;
}

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

.contact-item-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.contact-item-value {
    font-weight: 600;
    color: var(--text-dark);
}

nav {
    display: flex;
    gap: 2rem;
}

nav a {
    color: var(--text-dark);
    font-weight: 500;
    padding: 0.5rem 0;
    border-bottom: 3px solid transparent;
    transition: border-color 0.3s ease, color 0.3s ease;
}

nav a:hover,
nav a.active {
    color: var(--primary-blue);
    border-bottom-color: var(--primary-blue);
}

/* ===== HERO SECTION ===== */
.hero {
    background: linear-gradient(135deg, var(--dark-blue) 0%, var(--primary-blue) 100%);
    color: var(--bg-white);
    padding: 6rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="3" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="80" r="3" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="20" r="2" fill="rgba(255,255,255,0.05)"/></svg>');
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    color: var(--bg-white);
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.hero p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.3rem;
    margin-bottom: 2rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== SECTIONS & CONTAINERS ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 4rem 0;
}

section.light-bg {
    background-color: var(--bg-light);
}

section.dark-bg {
    background-color: var(--dark-blue);
    color: var(--bg-white);
}

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

.section-title h2 {
    position: relative;
    display: inline-block;
    padding-bottom: 1rem;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-green));
    border-radius: 2px;
}

.section-subtitle {
    color: var(--text-light);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ===== GRID LAYOUTS ===== */
.grid {
    display: grid;
    gap: 2rem;
}

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

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

/* ===== CARDS ===== */
.card {
    background: var(--bg-white);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-light);
}

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

.card-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
    background-color: var(--bg-light);
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.card:hover .card-image img {
    transform: scale(1.05);
}

.card-content {
    padding: 1.5rem;
}

.card-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.card-text {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ===== PRODUCT CARDS ===== */
.product-card {
    background: var(--bg-white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    transition: all 0.3s ease;
    border: 1px solid var(--border-light);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-large);
}

.product-image {
    width: 100%;
    height: 280px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--light-blue), var(--bg-light));
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-content {
    padding: 1.5rem;
}

.product-content h3 {
    color: var(--dark-blue);
    margin-bottom: 0.8rem;
}

.spec {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.product-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.product-actions .btn {
    flex: 1;
    text-align: center;
}

/* ===== PRODUCTS GRID ===== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

/* ===== TESTIMONIALS ===== */
.testimonials-slider {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.testimonial-item {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 8px;
    border-left: 4px solid var(--primary-blue);
    box-shadow: var(--shadow-soft);
}

.testimonial-content {
    color: var(--text-light);
    margin-bottom: 1rem;
    font-style: italic;
    line-height: 1.8;
}

.testimonial-author {
    color: var(--text-dark);
    font-weight: 600;
    border-top: 1px solid var(--border-light);
    padding-top: 1rem;
}

/* ===== INDUSTRIES GRID ===== */
.industries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.industry-item {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    box-shadow: var(--shadow-soft);
    border-top: 3px solid var(--primary-blue);
    transition: all 0.3s ease;
}

.industry-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.industry-item h4 {
    color: var(--dark-blue);
    margin-bottom: 0.8rem;
}

/* ===== FEATURE BOXES ===== */
.feature-box {
    text-align: center;
    padding: 2rem;
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-green));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    font-size: 2.5rem;
}

.feature-box h4 {
    color: var(--dark-blue);
    margin-bottom: 0.8rem;
}

.feature-box p {
    color: var(--text-light);
}

/* ===== SPECS TABLE ===== */
.specs-table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    box-shadow: var(--shadow-soft);
    border-radius: 8px;
    overflow: hidden;
}

.specs-table thead {
    background: linear-gradient(135deg, var(--primary-blue), var(--dark-blue));
    color: var(--bg-white);
}

.specs-table th,
.specs-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}

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

.specs-table td:first-child {
    font-weight: 600;
    color: var(--dark-blue);
    width: 30%;
}

/* ===== FORMS ===== */
form {
    max-width: 600px;
    margin: 2rem auto;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

input[type="text"],
input[type="email"],
input[type="phone"],
input[type="tel"],
select,
textarea {
    width: 100%;
    padding: 0.875rem;
    border: 1px solid var(--border-light);
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="phone"]:focus,
input[type="tel"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

textarea {
    resize: vertical;
    min-height: 150px;
}

.form-note {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* ===== FOOTER ===== */
footer {
    background-color: var(--dark-blue);
    color: var(--bg-white);
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

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

.footer-section h4 {
    color: var(--bg-white);
    margin-bottom: 1rem;
}

.footer-section p,
.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 0.5rem;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

/* ===== SIDEBAR ===== */
.sidebar {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 8px;
    height: fit-content;
    position: sticky;
    top: 100px;
}

.sidebar h3 {
    margin-bottom: 1.5rem;
    color: var(--dark-blue);
}

.sidebar-item {
    margin-bottom: 1rem;
}

.sidebar-item a {
    display: block;
    padding: 0.75rem;
    background: var(--bg-white);
    border-left: 3px solid transparent;
    transition: all 0.3s ease;
}

.sidebar-item a:hover,
.sidebar-item a.active {
    background-color: var(--light-blue);
    border-left-color: var(--primary-blue);
    color: var(--primary-blue);
}

/* ===== BREADCRUMB ===== */
.breadcrumb {
    display: flex;
    gap: 0.5rem;
    padding: 1rem 0;
    font-size: 0.9rem;
    margin-bottom: 2rem;
}

.breadcrumb a {
    color: var(--primary-blue);
}

.breadcrumb span {
    color: var(--text-muted);
    margin: 0 0.5rem;
}

.breadcrumb .active {
    color: var(--text-dark);
    font-weight: 600;
}

/* ===== BADGE ===== */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.badge-primary {
    background-color: var(--light-blue);
    color: var(--dark-blue);
}

.badge-success {
    background-color: #D4EDDA;
    color: #155724;
}

.badge-warning {
    background-color: #FFF3CD;
    color: #856404;
}

/* ===== ALERTS ===== */
.alert {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    border-left: 4px solid;
}

.alert-success {
    background-color: #D4EDDA;
    border-color: #28A745;
    color: #155724;
}

.alert-error {
    background-color: #F8D7DA;
    border-color: #DC3545;
    color: #721C24;
}

.alert-info {
    background-color: #D1ECF1;
    border-color: #0C5460;
    color: #0C5460;
}

/* ===== PAGINATION ===== */
.pagination {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.pagination a,
.pagination span {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-light);
    border-radius: 4px;
    color: var(--primary-blue);
    transition: all 0.3s ease;
}

.pagination a:hover {
    background-color: var(--primary-blue);
    color: var(--bg-white);
}

.pagination .current {
    background-color: var(--primary-blue);
    color: var(--bg-white);
    border-color: var(--primary-blue);
}

/* ===== CTA SECTION ===== */
.cta-section {
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-green));
    color: var(--bg-white);
    padding: 3rem 2rem;
    border-radius: 8px;
    text-align: center;
    margin: 3rem 0;
}

.cta-section h3 {
    color: var(--bg-white);
    margin-bottom: 1rem;
}

.cta-section p {
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 1.5rem;
}

.cta-section .btn {
    margin: 0 0.5rem;
}

/* ===== UTILITY CLASSES ===== */
.text-center {
    text-align: center;
}

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

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

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

.flex {
    display: flex;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }

.hidden {
    display: none;
}

.visible {
    display: block;
}