/* ========================================
   LINDEN GLASS WORKS - MAIN STYLESHEET
   Professional, SEO-optimized design
   ======================================== */

/* === COLOR VARIABLES === */
:root {
    --primary: #FF6B35;
    --primary-dark: #E55A2B;
    --primary-light: #FF8A5C;
    --black: #1A1A1A;
    --gray-dark: #2D2D2D;
    --gray-medium: #666666;
    --gray-light: #F5F5F5;
    --white: #FFFFFF;
    --shadow: rgba(0, 0, 0, 0.1);
}

/* === RESET & BASE === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--black);
    background: var(--white);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* === HEADER & NAVIGATION === */
.header {
    background: var(--white);
    box-shadow: 0 2px 15px var(--shadow);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.header.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.nav {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--black);
    text-decoration: none;
    transition: color 0.3s;
}

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

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    align-items: center;
}

.nav-link {
    color: var(--black);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 0;
    position: relative;
    transition: color 0.3s;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s;
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-cta {
    background: var(--primary);
    color: var(--white) !important;
    padding: 0.7rem 1.8rem !important;
    border-radius: 5px;
    transition: all 0.3s;
}

.nav-cta:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
}

.nav-cta::after {
    display: none;
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    color: var(--black);
    cursor: pointer;
    padding: 0.5rem;
}

/* === HERO SECTION === */
.hero {
    margin-top: 70px;
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.92) 0%, rgba(45, 45, 45, 0.92) 100%), 
                url('https://images.unsplash.com/photo-1541888946425-d81bb19240f5?auto=format&fit=crop&w=2070&q=80');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    padding: 8rem 2rem;
    text-align: center;
    color: var(--white);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

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

.hero p {
    font-size: 1.3rem;
    opacity: 0.95;
    margin-bottom: 2.5rem;
    line-height: 1.7;
}

/* === BUTTONS === */
.btn-group {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s;
    border: 2px solid transparent;
    cursor: pointer;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

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

.btn-secondary:hover {
    background: var(--gray-light);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border-color: var(--white);
    color: var(--white);
}

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

/* === STATS SECTION === */
.stats {
    background: var(--gray-light);
    padding: 3.5rem 2rem;
}

.stats-grid {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.stat-card {
    background: var(--white);
    padding: 2.5rem 2rem;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s;
}

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

.stat-number {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    color: var(--gray-medium);
    font-weight: 500;
}

/* === CONTAINER & SECTIONS === */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 5rem 2rem;
}

.section {
    padding: 5rem 2rem;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--gray-medium);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
}

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

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* === CARDS === */
.card {
    background: var(--white);
    border: 1px solid #e5e5e5;
    border-radius: 10px;
    padding: 2.5rem;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--primary);
    transition: width 0.3s;
}

.card:hover {
    box-shadow: 0 10px 40px var(--shadow);
    transform: translateY(-5px);
}

.card:hover::before {
    width: 100%;
}

.card h3 {
    font-size: 1.5rem;
    color: var(--black);
    margin-bottom: 1rem;
    font-weight: 600;
}

.card p {
    color: var(--gray-medium);
    line-height: 1.8;
}

/* === FEATURE BOXES === */
.feature-box {
    background: var(--white);
    padding: 2rem;
    border-radius: 8px;
    border-left: 4px solid var(--primary);
    margin-bottom: 1.5rem;
}

.feature-box h3 {
    font-size: 1.3rem;
    margin-bottom: 0.7rem;
    color: var(--black);
}

.feature-box p {
    color: var(--gray-medium);
    line-height: 1.7;
}

/* === IMAGES === */
.image-container {
    border-radius: 10px;
    overflow: hidden;
    height: 100%;
    min-height: 400px;
}

.bg-image {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
}

/* === FOOTER === */
.footer {
    background: var(--black);
    color: var(--white);
    padding: 4rem 2rem 1.5rem;
}

.footer-grid {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h3 {
    color: var(--primary);
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.footer-section p,
.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    display: block;
    line-height: 2;
    transition: color 0.3s;
}

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

.footer-bottom {
    max-width: 1400px;
    margin: 0 auto;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

/* === PAGE HEADER === */
.page-header {
    margin-top: 70px;
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.9) 0%, rgba(45, 45, 45, 0.9) 100%),
                url('https://images.unsplash.com/photo-1541888946425-d81bb19240f5?auto=format&fit=crop&w=2070&q=80');
    background-size: cover;
    background-position: center;
    padding: 5rem 2rem;
    text-align: center;
    color: var(--white);
}

.page-header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.3rem;
    opacity: 0.9;
}

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

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

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

.bg-dark {
    background: linear-gradient(135deg, var(--black) 0%, var(--gray-dark) 100%);
    color: var(--white);
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    /* Navigation */
    .mobile-toggle {
        display: block;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 2rem;
        box-shadow: 0 10px 30px var(--shadow);
        display: none;
    }

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

    /* Typography */
    .hero h1 {
        font-size: 2.2rem;
    }

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

    .section-title {
        font-size: 2rem;
    }

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }

    /* Spacing */
    .container,
    .section {
        padding: 3rem 1.5rem;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

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

    .btn-group {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }
}

/* === ANIMATIONS === */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-in {
    animation: fadeInUp 0.6s ease-out;
}

/* === ACCESSIBILITY === */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus styles for accessibility */
a:focus,
button:focus,
input:focus,
textarea:focus,
select:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}