/* Commercial PUF Panels - Global Styles */
:root {
    --primary-blue: #3B82F6;
    --primary-light: #629BF8;
    --secondary-light: #89B4FA;
    --tertiary-light: #B1CDFB;
    --bg-light: #D8E6FD;
    --dark-text: #1F2937;
    --light-gray: #F3F4F6;
    --border-color: #E5E7EB;
}

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

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin-bottom: 1rem;
    color: var(--dark-text);
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
}

h2 {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.3;
}

h3 {
    font-size: 1.5rem;
    font-weight: 600;
}

h4 {
    font-size: 1.25rem;
    font-weight: 600;
}

p {
    margin-bottom: 1rem;
    font-size: 1rem;
}

/* Header & Navigation */
header {
    background: #ffffff;
    color: var(--dark-text);
    padding: 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    padding: 0.5rem 2rem;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-img {
    height: 56px;
    width: auto;
    display: block;
}

nav {
    display: flex;
    gap: 0;
    align-items: center;
}

nav a {
    color: var(--dark-text);
    text-decoration: none;
    padding: 1.5rem 1.5rem;
    display: inline-block;
    transition: background-color 0.3s ease, color 0.3s ease;
    font-weight: 500;
}

nav a:hover {
    background-color: rgba(59, 130, 246, 0.08);
    color: var(--primary-blue);
}

nav a.active {
    color: var(--primary-blue);
    background-color: rgba(59, 130, 246, 0.08);
    border-bottom: 3px solid var(--primary-blue);
}

/* Footer */
footer {
    background: linear-gradient(135deg, var(--dark-text) 0%, #374151 100%);
    color: #F3F4F6;
    padding: 3rem 2rem 1rem;
    margin-top: 4rem;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
}

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

.footer-section h4 {
    color: white;
    margin-bottom: 1rem;
}

.footer-section p, .footer-section a {
    color: #D1D5DB;
    font-size: 0.95rem;
    text-decoration: none;
    margin-bottom: 0.5rem;
    display: block;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    text-align: center;
    color: #9CA3AF;
    font-size: 0.9rem;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-light) 50%, var(--secondary-light) 100%);
    color: white;
    padding: 4rem 2rem;
    text-align: center;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.hero h1 {
    font-size: 2.8rem;
    margin-bottom: 1.5rem;
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero .sub-headline {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.95);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 1.75rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background-color: white;
    color: var(--primary-blue);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

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

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

.btn-outline {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

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

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Sections */
section {
    padding: 4rem 2rem;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    padding-top: 50px;
}

.section-title h2 {
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

.section-title p {
    color: #6B7280;
    font-size: 1.1rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Grid Layout */
.grid {
    display: grid;
    gap: 2rem;
    margin-top: 2rem;
}

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

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Cards */
.card {
    background: white;
    border-radius: 0.75rem;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.card:hover {
    box-shadow: 0 8px 24px rgba(59, 130, 246, 0.15);
    transform: translateY(-4px);
}

.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background-color: var(--bg-light);
}

.card-content {
    padding: 1.5rem;
}

.card-content h3 {
    color: var(--primary-blue);
    margin-bottom: 0.75rem;
}

.card-content p {
    color: #6B7280;
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.card-list {
    list-style: none;
    padding-left: 0;
}

.card-list li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: #6B7280;
    font-size: 0.95rem;
}

.card-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-blue);
    font-weight: bold;
}

/* Feature Section */
.feature-item {
    padding: 2rem;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(217, 119, 6, 0.02) 100%);
    border-radius: 0.75rem;
    border-left: 4px solid var(--primary-blue);
}

.feature-item h3 {
    color: var(--dark-text);
    margin-top: 0;
}

.feature-item p {
    color: #6B7280;
    margin-bottom: 0;
}

/* Contact Form */
.contact-section {
    background: var(--bg-light);
    padding: 3rem 2rem;
    border-radius: 0.75rem;
    margin: 2rem 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

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

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark-text);
}

input[type="text"],
input[type="email"],
input[type="phone"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="phone"]:focus,
input[type="number"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

textarea {
    resize: vertical;
    min-height: 120px;
}

.form-note {
    font-size: 0.85rem;
    color: #9CA3AF;
    margin-top: 0.25rem;
}

.required {
    color: #EF4444;
}

/* Intro Section */
.intro-section {
    background: white;
    padding: 2rem;
    border-radius: 0.75rem;
    color: #6B7280;
    line-height: 1.8;
}

.intro-section p {
    margin-bottom: 1.25rem;
    font-size: 1.05rem;
}

.intro-section strong {
    color: var(--dark-text);
    font-weight: 600;
}

/* What We Offer */
.offer-list {
    list-style: none;
    padding: 0;
}

.offer-list li {
    padding: 1rem 0;
    padding-left: 2rem;
    position: relative;
    font-size: 1rem;
    color: #6B7280;
    border-bottom: 1px solid var(--border-color);
}

.offer-list li:last-child {
    border-bottom: none;
}

.offer-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-blue);
    font-weight: bold;
    font-size: 1.2rem;
}

/* How It Works */
.how-it-works {
    background: white;
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.step {
    text-align: center;
    padding: 2rem 1.5rem;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(217, 119, 6, 0.02) 100%);
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
}

.step-number {
    display: inline-block;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-light) 100%);
    color: white;
    border-radius: 50%;
    line-height: 50px;
    text-align: center;
    font-weight: bold;
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.step h4 {
    color: var(--dark-text);
    margin-bottom: 0.75rem;
}

.step p {
    color: #6B7280;
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* Trust Signals */
.trust-section {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(217, 119, 6, 0.02) 100%);
    border-radius: 0.75rem;
    padding: 2rem;
    margin: 2rem 0;
    text-align: center;
    border: 1px solid var(--border-color);
}

.trust-section p {
    color: #6B7280;
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

/* Product Cards */
.product-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    overflow: hidden;
    transition: all 0.3s ease;
}

.product-card:hover {
    box-shadow: 0 12px 32px rgba(59, 130, 246, 0.2);
    transform: translateY(-6px);
}

.product-card-image {
    width: 100%;
    height: 240px;
    object-fit: contain;
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--tertiary-light) 100%);
}

.product-card-content {
    padding: 1.75rem;
}

.product-card-header {
    margin-bottom: 1rem;
}

.product-card-header h3 {
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

.product-specs {
    list-style: none;
    padding: 1rem 0;
    margin: 1rem 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.product-specs li {
    padding: 0.5rem 0;
    color: #6B7280;
    font-size: 0.95rem;
    padding-left: 1.5rem;
    position: relative;
}

.product-specs li::before {
    content: '◆';
    position: absolute;
    left: 0;
    color: var(--primary-light);
    font-size: 0.7rem;
}

.best-for {
    background: var(--bg-light);
    padding: 1rem;
    border-radius: 0.5rem;
    margin-top: 1rem;
}

.best-for strong {
    color: var(--primary-blue);
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    text-transform: uppercase;
}

.best-for p {
    color: #6B7280;
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* Application Cards */
.application-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 2rem;
    transition: all 0.3s ease;
}

.application-card:hover {
    box-shadow: 0 8px 24px rgba(59, 130, 246, 0.15);
    border-color: var(--primary-light);
}

.application-card h3 {
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

.application-card p {
    color: #6B7280;
    margin-bottom: 0;
    line-height: 1.7;
}

/* Specification Table */
.spec-table-wrapper {
    overflow-x: auto;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
}

.spec-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 1rem;
}

.spec-table th,
.spec-table td {
    padding: 0.9rem 1.25rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.spec-table thead th {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-light) 100%);
    color: white;
    font-weight: 600;
}

.spec-table tbody tr:last-child td {
    border-bottom: none;
}

.spec-table tbody tr:nth-child(even) {
    background: var(--bg-light);
}

.spec-table td:first-child {
    font-weight: 600;
    color: var(--dark-text);
}

.spec-table td {
    color: #6B7280;
}

/* FAQ Section */
.faq-section {
    margin-top: 3rem;
}

.faq-item {
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    overflow: hidden;
}

.faq-question {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(217, 119, 6, 0.02) 100%);
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: var(--primary-blue);
    transition: background-color 0.3s ease;
}

.faq-question:hover {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(217, 119, 6, 0.05) 100%);
}

.faq-question::after {
    content: '▼';
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question::after {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 1.5rem;
    color: #6B7280;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .hero {
        min-height: 350px;
        padding: 2rem 1rem;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .hero .sub-headline {
        font-size: 1.1rem;
    }

    .hero::before {
        width: 250px;
        height: 250px;
    }

    .header-container {
        flex-direction: column;
    }

    .logo {
        padding: 1rem;
    }

    nav {
        flex-wrap: wrap;
        width: 100%;
    }

    nav a {
        flex: 1;
        padding: 1rem;
        text-align: center;
        font-size: 0.9rem;
        border-bottom: 2px solid transparent;
    }

    nav a:hover {
        border-bottom: 2px solid var(--primary-blue);
        background-color: rgba(59, 130, 246, 0.08);
    }

    nav a.active {
        border-bottom: 2px solid var(--primary-blue);
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

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

    section {
        padding: 2rem 1rem;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.5rem;
    }

    h2 {
        font-size: 1.25rem;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

    .hero .sub-headline {
        font-size: 1rem;
    }

    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.95rem;
    }

    nav a {
        padding: 0.75rem;
    }
}