/**
 * MSA Pack - Global Stylesheet
 * Eyewear Packaging Website
 * Color Palette from msapack.com
 * 
 * Primary: #F6C419 (Brand Gold)
 * Dark: #253038 (Footer/Dark Sections)
 * Black: #000000 (Navbar/Text)
 */

/* ============================================
   CSS Variables & Reset
   ============================================ */
:root {
    /* Primary Colors */
    --color-brand: #F6C419;
    --color-brand-hover: #E5B308;
    --color-dark: #253038;
    --color-black: #000000;
    
    /* Secondary Colors */
    --color-white: #FFFFFF;
    --color-gray-light: #F4EBDA;
    --color-gray-medium: #929292;
    --color-gray-border: #898989;
    --color-gray-text: #333333;
    --color-gray-secondary: #666666;
    --color-gray-placeholder: #999999;
    --color-blue-footer: #083F78;
    --color-blue-link: #1886D1;
    
    /* Opacity Variants */
    --color-black-70: rgba(0, 0, 0, 0.7);
    --color-black-50: rgba(0, 0, 0, 0.5);
    --color-white-80: rgba(255, 255, 255, 0.8);
    --color-white-60: rgba(255, 255, 255, 0.6);
    --color-white-50: rgba(255, 255, 255, 0.5);
    
    /* Typography */
    --font-primary: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'DIN Bold', 'Open Sans', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 5rem;
    
    /* Container */
    --container-max: 1520px;
    --container-padding: 1rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-gray-text);
    background-color: var(--color-white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

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

ul, ol {
    list-style: none;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-black);
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-gray-secondary);
}

.text-brand { color: var(--color-brand) !important; }
.text-dark { color: var(--color-dark) !important; }
.text-white { color: var(--color-white) !important; }
.text-muted { color: var(--color-gray-secondary) !important; }

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

.font-heading { font-family: var(--font-heading); }

/* ============================================
   Layout & Container
   ============================================ */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

.container-fluid {
    width: 100%;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

.section {
    padding: var(--spacing-xxl) 0;
}

.section-sm { padding: var(--spacing-xl) 0; }
.section-lg { padding: calc(var(--spacing-xxl) * 1.5) 0; }

/* Grid System (Simple) */
.row {
    display: flex;
    flex-wrap: wrap;
    margin-left: calc(var(--spacing-sm) * -1);
    margin-right: calc(var(--spacing-sm) * -1);
}

.col {
    flex: 1;
    padding-left: var(--spacing-sm);
    padding-right: var(--spacing-sm);
}

.col-6 { flex: 0 0 50%; max-width: 50%; }
.col-4 { flex: 0 0 33.333%; max-width: 33.333%; }
.col-3 { flex: 0 0 25%; max-width: 25%; }
.col-grid-4 { flex: 0 0 25%; max-width: 25%; } /* 4 columns per row */

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 9999;
    height: 70px;
    background: var(--color-black-70);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all var(--transition-normal);
    display: block !important;
}

.navbar.scrolled {
    background: var(--color-black);
    box-shadow: var(--shadow-md);
}

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    height: 100%;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
}

.navbar-brand {
    display: flex;
    align-items: center;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: 1px;
}

.navbar-brand img {
    height: 40px;
    margin-right: var(--spacing-sm);
}

.navbar-brand:hover {
    color: var(--color-white);
}

.navbar-nav {
    display: flex !important;
    align-items: center;
    gap: var(--spacing-lg);
    flex-direction: row !important;
}

.nav-link {
    display: inline-block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-white);
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: var(--spacing-xs) 0;
    position: relative;
}

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

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

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

.nav-link.active {
    color: var(--color-brand) !important;
    font-weight: 600;
}

/* Mobile Menu Toggle */
.navbar-toggler {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.navbar-toggler span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--color-white);
    margin: 6px 0;
    transition: all var(--transition-fast);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-primary);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 0.875rem 2rem;
    border: 2px solid transparent;
    border-radius: 0;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-brand);
    border-color: var(--color-brand);
    color: var(--color-black);
}

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

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

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

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

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

.btn-sm {
    padding: 0.625rem 1.5rem;
    font-size: 0.8rem;
}

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

/* Button with Arrow */
.btn-arrow {
    position: relative;
    padding-right: 3rem;
}

.btn-arrow::after {
    content: '→';
    position: absolute;
    right: 1.5rem;
    transition: transform var(--transition-fast);
}

.btn-arrow:hover::after {
    transform: translateX(4px);
}

/* ============================================
   Hero / Banner Section
   ============================================ */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-dark);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0,0,0,0.4), rgba(0,0,0,0.7));
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    padding: var(--spacing-lg);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    letter-spacing: 2px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-white-80);
    margin-bottom: var(--spacing-xl);
    font-weight: 300;
}

/* Scroll Down Indicator */
.scroll-down {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-down a {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--color-white);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.scroll-down .arrow {
    width: 30px;
    height: 50px;
    border: 2px solid var(--color-white);
    border-radius: 15px;
    margin-top: var(--spacing-xs);
    position: relative;
}

.scroll-down .arrow::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background: var(--color-white);
    border-radius: 50%;
    animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
    0%, 100% { top: 8px; opacity: 1; }
    50% { top: 24px; opacity: 0.3; }
}

/* ============================================
   Cards
   ============================================ */
.card {
    background: var(--color-white);
    border: none;
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    position: relative;
}

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

/* Make entire card clickable */
.card-link {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
}

.card-body {
    position: relative;
    z-index: 1;
}

.card-image {
    position: relative;
    z-index: 1;
}

.card-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4/3;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.card-body {
    padding: var(--spacing-md);
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.card-text {
    color: var(--color-gray-secondary);
    font-size: 0.9rem;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--color-dark);
    color: var(--color-white-80);
    padding-top: var(--spacing-xxl);
}

.footer-main {
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: var(--color-white-60);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-brand);
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
}

.footer-contact i {
    margin-right: var(--spacing-sm);
    color: var(--color-brand);
    margin-top: 4px;
}

.footer-bottom {
    padding: var(--spacing-md) 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--color-white-50);
}

.footer-bottom a {
    color: var(--color-white-50);
    margin-left: var(--spacing-md);
}

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

/* ============================================
   Utilities
   ============================================ */
.d-flex { display: flex; }
.d-block { display: block; }
.d-none { display: none; }

.justify-content-start { justify-content: flex-start; }
.justify-content-center { justify-content: center; }
.justify-content-end { justify-content: flex-end; }
.justify-content-between { justify-content: space-between; }

.align-items-start { align-items: flex-start; }
.align-items-center { align-items: center; }
.align-items-end { align-items: flex-end; }

.flex-column { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }

.gap-1 { gap: var(--spacing-xs); }
.gap-2 { gap: var(--spacing-sm); }
.gap-3 { gap: var(--spacing-md); }

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }
.p-5 { padding: var(--spacing-xl); }

.bg-brand { background-color: var(--color-brand); }
.bg-dark { background-color: var(--color-dark); }
.bg-black { background-color: var(--color-black); }
.bg-light { background-color: #f8f9fa; }

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1200px) {
    :root {
        --container-padding: 1.5rem;
    }
    
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    
    .hero-title { font-size: 2.5rem; }
}

@media (max-width: 992px) {
    .navbar-nav {
        display: none !important;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--color-black);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: 0;
    }
    
    .navbar-nav.show {
        display: flex !important;
    }
    
    .nav-link {
        padding: var(--spacing-sm) 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .navbar-toggler {
        display: block;
    }
    
    .col-4, .col-3 {
        flex: 0 0 50%;
        max-width: 50%;
    }
    
    .hero-title { font-size: 2rem; }
    .hero-subtitle { font-size: 1rem; }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 1rem;
    }
    
    .section { padding: var(--spacing-xl) 0; }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    
    .col-6, .col-4, .col-3 {
        flex: 0 0 100%;
        max-width: 100%;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .btn {
        padding: 0.75rem 1.5rem;
    }
}

@media (max-width: 576px) {
    .hero-title { font-size: 1.75rem; }
    .hero-subtitle { font-size: 0.9rem; }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
}