/* ============================================
   Color Theme — based on PUF Panel Cost logo
   Navy #1B2A4A | Orange #E87722 | Gray #8C8C8C
   ============================================ */
:root {
    --primary: #E87722;      /* orange accent */
    --secondary: #8C8C8C;   /* silver gray */
    --tertiary: #2D4070;    /* medium navy */
    --dark: #1B2A4A;        /* dark navy */
    --light: #F5F6F8;
    --white: #FFFFFF;
    --gray: #6C757D;
    --border: #E0E0E0;
    --success: #28A745;
    --danger: #DC3545;
}

/* ============================================
   Global Styles
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: var(--white);
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--dark);
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: 1rem;
    color: #555;
    line-height: 1.8;
}

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

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

/* ============================================
   Navbar
   ============================================ */
.navbar {
    background: var(--white);
    padding: 0.5rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(27, 42, 74, 0.12);
    border-bottom: 3px solid var(--primary);
}

.navbar-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.logo a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--dark);
    text-decoration: none;
    font-size: 1.3rem;
    font-weight: 700;
}

.logo-img {
    height: 52px;
    width: auto;
    display: block;
}

.logo-icon {
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--dark);
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.btn-primary {
    background: var(--primary);
    color: var(--white) !important;
    padding: 0.5rem 1.5rem;
    border-radius: 5px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: var(--dark);
    color: var(--white) !important;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 0.4rem;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--dark);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    background: linear-gradient(135deg, var(--dark) 0%, var(--tertiary) 50%, var(--secondary) 100%);
    color: var(--white);
    padding: 5rem 1rem;
    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;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(232, 119, 34, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(45, 64, 112, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--white);
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.88);
    line-height: 1.8;
}

.btn-hero {
    display: inline-block;
    background: var(--primary);
    color: var(--white);
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(232, 119, 34, 0.4);
}

.btn-hero:hover {
    background: var(--white);
    color: var(--dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(232, 119, 34, 0.5);
}

/* ============================================
   Container & Layout
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.section {
    /* padding: 4rem 1rem; */
}

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

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

.section-title p {
    font-size: 1.1rem;
    color: var(--gray);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   Grid System
   ============================================ */
.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(200px, 1fr));
}

/* ============================================
   Card Styles
   ============================================ */
.card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(27, 42, 74, 0.08);
    transition: all 0.3s ease;
    border: 1px solid var(--border);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(27, 42, 74, 0.15);
}

.card-image {
    width: 100%;
    height: 200px;
    object-fit: contain;
    background: linear-gradient(135deg, var(--dark) 0%, var(--tertiary) 100%);
}

.card-header {
    background: linear-gradient(135deg, var(--dark) 0%, var(--tertiary) 100%);
    padding: 2rem 1.5rem;
    color: var(--white);
    text-align: center;
}

.card-header h3 {
    color: var(--white);
    margin-bottom: 0.5rem;
}

.card-header h4 {
    color: var(--white);
}

.card-body {
    padding: 1.5rem;
}

.card-body p {
    margin-bottom: 0.8rem;
    font-size: 0.95rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
    text-align: center;
}

.card-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1rem;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-icon svg {
    fill: var(--white) !important;
    width: 30px;
    height: 30px;
}

/* Product Card Variants */
.card-product {
    display: flex;
    flex-direction: column;
}

.card-product-image {
    width: 100%;
    height: 250px;
    background: linear-gradient(135deg, var(--dark) 0%, var(--tertiary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 2rem;
}

.card-product-body {
    flex: 1;
    padding: 1.5rem;
}

.card-product-specs {
    list-style: none;
    margin: 1rem 0;
}

.card-product-specs li {
    padding: 0.4rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: #666;
    font-size: 0.9rem;
}

.card-product-specs li::before {
    content: '-';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

/* ============================================
   Introduction Section
   ============================================ */
.introduction {
    background: var(--light);
    padding: 3rem 1.5rem;
    border-radius: 10px;
    line-height: 1.8;
    margin-bottom: 3rem;
}

.introduction p {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: #555;
}

/* ============================================
   Two Column Layout (Introduction + Contact Form)
   ============================================ */
.intro-contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
    margin-bottom: 3rem;
}

.intro-section {
    background: var(--light);
    padding: 2rem;
    border-radius: 10px;
}

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

.intro-section p {
    line-height: 1.8;
    color: #555;
}

/* ============================================
   Contact Form
   ============================================ */
.contact-form {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(27, 42, 74, 0.1);
    border: 1px solid var(--border);
}

.contact-form h3 {
    color: var(--dark);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--dark);
    font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 5px;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(232, 119, 34, 0.15);
}

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

.btn-submit {
    width: 100%;
    padding: 0.85rem;
    background: linear-gradient(135deg, var(--tertiary) 0%, var(--dark) 100%);
    color: var(--white);
    border: none;
    border-radius: 5px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(27, 42, 74, 0.3);
}

.form-success {
    background: #d4edda;
    color: #155724;
    padding: 1rem;
    border-radius: 5px;
    margin-bottom: 1rem;
    border: 1px solid #c3e6cb;
}

.form-error {
    background: #f8d7da;
    color: #721c24;
    padding: 1rem;
    border-radius: 5px;
    margin-bottom: 1rem;
    border: 1px solid #f5c6cb;
}

/* ============================================
   Cost Guide Section
   ============================================ */
.cost-guide {
    background: var(--light);
    padding: 3rem 1.5rem;
    border-radius: 10px;
    margin: 3rem 0;
}

.cost-guide h3 {
    color: var(--dark);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.cost-guide h3::before {
    content: '';
    display: inline-block;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--dark) 100%);
    border-radius: 50%;
    flex-shrink: 0;
}

.cost-guide-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.cost-item {
    background: var(--white);
    padding: 1rem;
    border-radius: 5px;
    border-left: 4px solid var(--tertiary);
}

.cost-item strong {
    color: var(--dark);
    display: block;
    margin-bottom: 0.5rem;
}

.cost-item p {
    margin: 0;
    font-size: 0.9rem;
    color: #666;
}

/* ============================================
   List Styles
   ============================================ */
ul, ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

li {
    margin-bottom: 0.8rem;
    line-height: 1.8;
    color: #555;
}

li::marker {
    color: var(--tertiary);
    font-weight: bold;
}

/* ============================================
   FAQ Section
   ============================================ */
.faq-container {
    margin: 3rem 0;
}

.faq-item {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 1rem;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-question {
    padding: 1.5rem;
    background: linear-gradient(135deg, var(--dark) 0%, var(--tertiary) 100%);
    color: var(--white);
    cursor: pointer;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
}

.faq-question:hover {
    background: linear-gradient(135deg, var(--tertiary) 0%, var(--dark) 100%);
}

.faq-toggle {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
}

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

.faq-answer {
    display: none;
    padding: 1.5rem;
    background: var(--light);
    color: #555;
    line-height: 1.8;
}

.faq-item.active .faq-answer {
    display: block;
}

/* ============================================
   Trust Signals
   ============================================ */
.trust-signals {
    background: linear-gradient(135deg, var(--dark) 0%, var(--tertiary) 100%);
    color: var(--white);
    padding: 2rem 1.5rem;
    border-radius: 10px;
    margin: 3rem 0;
    text-align: center;
}

.trust-signals p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

/* ============================================
   CTA Section
   ============================================ */
.cta-section {
    background: linear-gradient(135deg, var(--dark) 0%, var(--tertiary) 100%);
    color: var(--white);
    padding: 3rem 1rem;
    text-align: center;
    border-radius: 10px;
    margin: 3rem 0;
}

.cta-section h2 {
    color: var(--white);
    margin-bottom: 1.5rem;
}

.cta-section p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.btn-cta {
    display: inline-block;
    background: var(--primary);
    color: var(--white);
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.btn-cta:hover {
    background: var(--white);
    transform: translateY(-2px);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: linear-gradient(135deg, var(--dark) 0%, var(--tertiary) 100%);
    color: var(--white);
    padding: 3rem 1rem 1rem;
    margin-top: 4rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

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

.footer-section h4 {
    color: var(--primary);
    margin-bottom: 1rem;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    transition: color 0.3s ease;
}

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

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

.footer-section ul {
    list-style: none;
    margin: 0;
}

.footer-section ul li {
    margin-bottom: 0.6rem;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.social-links a:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
}

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

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

    h2 {
        font-size: 1.5rem;
    }

    h3 {
        font-size: 1.2rem;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 67px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--dark);
        padding: 1rem;
        gap: 0;
        border-top: 3px solid var(--primary);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu a {
        color: var(--white);
        padding: 0.8rem 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

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

    .menu-toggle {
        display: flex;
    }

    .hero {
        padding: 3rem 1rem;
        min-height: auto;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

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

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

    .grid-3 {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }

    .section {
        padding: 2rem 1rem;
    }

    .cost-guide-items {
        grid-template-columns: 1fr;
    }
}

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

    h2 {
        font-size: 1.2rem;
    }

    h3 {
        font-size: 1rem;
    }

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

    .hero-subtitle {
        font-size: 1rem;
    }

    .btn-hero {
        padding: 0.8rem 1.5rem;
        font-size: 0.95rem;
    }

    .navbar-container {
        padding: 0 0.5rem;
    }

    .logo a {
        font-size: 1rem;
    }

    .intro-section,
    .contact-form {
        padding: 1.5rem;
    }

    .section {
        padding: 1.5rem 0.75rem;
    }

    .footer-grid {
        gap: 1.5rem;
    }

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

    .cost-item {
        padding: 0.75rem;
    }
}

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

.text-dark {
    color: var(--dark);
}

.text-secondary {
    color: var(--secondary);
}

.text-muted {
    color: var(--gray);
}

.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; }