/* 
 * Cold Chain "Magazine" Style Template
 * Design System & Global Styles
 */


:root {
    /* Colors */
    --color-primary: #0f172a;
    /* Deep Ocean Blue */
    --color-secondary: #334155;
    /* Slate */
    --color-accent: #94a3b8;
    /* Light Slate */
    --color-highlight: #e11d48;
    /* Fresh Red - Use sparingly */
    --color-bg: #f8fafc;
    /* Paper White */
    --color-surface: #ffffff;
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-border: #e2e8f0;

    /* Typography */
    --font-serif: 'Playfair Display', serif;
    --font-sans: 'Inter', sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Layout */
    --container-width: 1200px;
    --header-height: 80px;
}

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

html,
body {
    overflow-x: hidden;
    width: 100%;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-serif);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-primary);
}

h1 {
    font-size: 3.5rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.25rem;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

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

ul {
    list-style: none;
}

/* Utilities */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

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

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

.uppercase {
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.875rem;
}

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

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

.mt-sm {
    margin-top: var(--spacing-sm);
}

.mt-md {
    margin-top: var(--spacing-md);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}

/* Components */

/* Header */
.site-header {
    height: var(--header-height);
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    border-bottom: 1px solid var(--color-border);
    padding: 0 var(--spacing-md);
    position: sticky;
    top: 0;
    background: rgba(248, 250, 252, 0.95);
    backdrop-filter: blur(5px);
    z-index: 1000;
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    justify-self: start;
    white-space: nowrap;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
    grid-column: 2;
}

.site-header .btn-outline {
    justify-self: end;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-secondary);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-primary);
    transition: width 0.3s ease;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    background: var(--color-primary);
    color: white;
    font-family: var(--font-sans);
    font-weight: 500;
    border: 1px solid var(--color-primary);
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

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

/* Placeholders */
.placeholder-img {
    background-color: #cbd5e1;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #64748b;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    position: relative;
    overflow: hidden;
}

.placeholder-img::after {
    content: '';
    opacity: 0.5;
}

/* Footer */
.site-footer {
    background: var(--color-primary);
    color: var(--color-surface);
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.footer-col h4 {
    color: var(--color-surface);
    margin-bottom: var(--spacing-sm);
}

.footer-col ul li {
    margin-bottom: 0.5rem;
}

.footer-col a {
    color: var(--color-accent);
}

.footer-col a:hover {
    color: white;
}

/* Responsive */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 2rem;
        --spacing-xl: 4rem;
    }

    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2rem;
    }

    .site-header {
        padding: 0 var(--spacing-sm);
        display: flex;
        justify-content: space-between;
    }

    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background: var(--color-bg);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding: var(--spacing-lg);
        transform: translateX(100%);
        transition: transform 0.3s ease-in-out;
        border-top: 1px solid var(--color-border);
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-link {
        font-size: 1.5rem;
        margin-bottom: var(--spacing-md);
    }

    .mobile-menu-btn {
        display: block;
        background: none;
        border: none;
        cursor: pointer;
        padding: 0.5rem;
        z-index: 1001;
    }

    .mobile-menu-btn span {
        display: block;
        width: 25px;
        height: 2px;
        background-color: var(--color-primary);
        margin: 5px 0;
        transition: all 0.3s ease;
    }

    /* Hamburger Animation */
    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    /* Hide desktop CTA in header on mobile if needed, or keep it */
    .site-header .btn-outline {
        display: none;
    }
}

@media (min-width: 769px) {
    .mobile-menu-btn {
        display: none;
    }
}

/* Pagination - Magazine Style (Borderless) */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: var(--spacing-lg);
    padding: var(--spacing-sm) 0;
}

.pagination-btn,
.pagination-nav {
    font-family: var(--font-serif);
    font-size: 0.9rem;
    padding: 0.5rem 0.25rem;
    background: transparent;
    border: none;
    color: var(--color-text-light);
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    position: relative;
    min-width: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pagination-btn::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 1px;
    background: var(--color-primary);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.pagination-btn:hover,
.pagination-btn.active {
    color: var(--color-primary);
}

.pagination-btn.active {
    font-weight: 700;
}

.pagination-btn.active::after {
    width: 60%;
}

.pagination-nav {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-primary);
    gap: 0.5rem;
}

.pagination-nav span {
    font-size: 0.7rem;
}

.pagination-nav:hover:not(.disabled) {
    opacity: 0.6;
}

.pagination-nav.disabled {
    opacity: 0.2;
    cursor: default;
}

@media (max-width: 768px) {
    .pagination {
        gap: 0.5rem;
        flex-wrap: nowrap;
        /* Keep it horizontal */
    }

    .pagination-nav span {
        display: none;
        /* Icon only on mobile to save space */
    }

    .pagination-btn {
        min-width: 25px;
        font-size: 0.85rem;
    }
}