:root {
    /* Primary colors */
    --winter-primary: #2d7dd2;      /* Lighter bright blue (was #1b3b6f) */
    --winter-secondary: #6ba4e9;    /* Soft blue for accents */

    /* Background colors */
    --winter-bg-light: #f0f5fa;     /* Very light icy blue */
    --winter-bg-medium: #e1eaf4;    /* Light blue for active states */

    /* Text colors */
    --text-dark: #1a1a1a;           /* Almost black for main text */
    --text-muted: #4a5568;          /* Darker gray for secondary text */

    /* Typography */
    --font-primary: 'Inter', system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-size-base: 1rem;
    --line-height-base: 1.5;

    /* Font sizes */
    --font-size-xs: 0.75rem;    /* 12px */
    --font-size-sm: 0.875rem;   /* 14px */
    --font-size-base: 1rem;     /* 16px */
    --font-size-lg: 1.125rem;   /* 18px */
    --font-size-xl: 1.25rem;    /* 20px */
    --font-size-2xl: 1.5rem;    /* 24px */
    --font-size-3xl: 1.75rem;   /* 28px - smaller for mobile */
}

/* Mobile first base styles */
body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--text-dark);
    min-height: 100vh;
}

/* Site title */
h1 {
    font-size: var(--font-size-xl);  /* Smaller on mobile */
    font-weight: 600;
    line-height: 1.2;
}

/* Page title */
.page-title {
    font-size: var(--font-size-2xl);  /* Smaller on mobile */
    font-weight: 500;
    padding: 1rem 0.5rem;
}

/* Navigation */
.navbar-nav .nav-link {
    font-size: var(--font-size-base);
    padding: 0.75rem 1rem;
}

/* Content spacing for mobile */
.container {
    max-width: 1140px;
    width: 100%;
    margin: 0 auto;
    padding-left: 1rem;
    padding-right: 1rem;
}

/* Tablet and up (≥768px) */
@media (min-width: 768px) {
    :root {
        --font-size-3xl: 2rem;      /* 32px */
    }

    .page-title {
        font-size: var(--font-size-3xl);
        padding: 1.5rem 1rem;
    }

    h1 {
        font-size: var(--font-size-2xl);
    }
}

/* Desktop (≥992px) */
@media (min-width: 992px) {
    :root {
        --font-size-3xl: 2.25rem;   /* 36px */
    }

    .navbar-nav .nav-link {
        font-size: var(--font-size-lg);
        padding: 1.25rem 2rem;
    }

    .page-title {
        padding: 1.5rem;
    }

    /* Larger spacing for desktop */
    .container {
        padding-left: 2rem;
        padding-right: 2rem;
    }
}

/* Large desktop (≥1200px) */
@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
        margin: 0 auto;
    }
}

/* Handle extremely small screens */
@media (max-width: 320px) {
    :root {
        --font-size-base: 0.9375rem;  /* 15px */
    }

    .page-title {
        font-size: var(--font-size-xl);
    }
}

/* Ensure text remains readable on landscape mobile */
@media (max-height: 480px) and (orientation: landscape) {
    .navbar-nav .nav-link {
        padding: 0.5rem 1rem;
    }
}

a {
    text-decoration: none !important;
}

/* Layout */
header {
    text-align: center;
    padding: 3rem 0;
    margin-inline: auto;
    max-width: 70em;
}

main {
    margin-inline: auto;
    max-width: 70em;
    border-top: 1px solid black;
    border-left: 1px solid black;
    border-right: 1px solid black;
    background-color: white;
    min-height: 100%;
}

#body {
    padding: 15px 5em 50px;
    position: relative;
    min-height: 100%;
}

.page-header {
    margin-top: 1rem;
    text-align: center;
}

/* Navigation */
.navbar {
    border-top: 1px solid var(--winter-bg-medium);
    border-bottom: 1px solid var(--winter-bg-medium);
    padding: 0;
    background-color: var(--winter-bg-light);
}

.navbar-nav .nav-item {
    position: relative;
    margin: 0 0.5rem;
}

.navbar-nav .nav-link {
    padding: 1rem 1.5rem;
    font-weight: 500;
    color: var(--text-dark);
    transition: all 0.2s ease-in-out;
}

/* Hover effect */
.navbar-nav .nav-link:hover {
    color: var(--winter-primary);
    background-color: var(--winter-bg-medium);
}

/* Active state */
.navbar-nav .nav-link.active {
    color: var(--winter-primary);
    font-weight: 600;
    background-color: var(--winter-bg-medium);
}

/* Underline effect for active tab */
.navbar-nav .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--winter-primary);
}

/* Runner Images */
.runner-image {
    width: 8vw;
    min-width: 100px;
    height: auto;
    z-index: -1;
    margin: 0;
}

/* Particles Background */
#particles-js {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    z-index: -1;
}

.navbar-toggler {
    border: none;
    padding: 0.5rem;
    transition: none;  /* Remove any transition from the button itself */
}

.navbar-toggler:focus {
    box-shadow: none;
}

/* Desktop and Mobile Responsive Styles */
@media (min-width: 992px) {
    .navbar-nav .nav-link {
        padding: 1.25rem 2rem;  /* Increased padding */
        font-size: 1.2rem;      /* Larger font size */
        font-weight: 500;
    }

    .navbar-nav .nav-item {
        margin: 0 0.75rem;      /* Slightly more space between items */
    }
}

@media (max-width: 991px) {
    h1 {
        font-size: 1.5rem;
    }

    .navbar-collapse {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        width: 100%;
        max-width: 300px;
        padding: 1rem;
        background-color: var(--winter-bg-light);
        z-index: 1000;
        transform: translateX(-100%);
        transition: transform 0.2s ease-out;
    }

    .navbar-collapse.show {
        transform: translateX(0);
    }

    /* Backdrop styling */
    .navbar-backdrop {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 999;  /* Just below the menu */
    }

    /* Show backdrop when menu is open */
    .navbar-collapse.show + .navbar-backdrop {
        display: block;
    }

    .navbar-nav .nav-item {
        margin: 0;
    }

    .navbar-nav .nav-link {
        padding: 1rem;
        border-bottom: 1px solid var(--winter-bg-medium);
    }

    .navbar-nav .nav-link.active::after {
        display: none;  /* Remove underline effect on mobile */
    }

    .navbar-nav .nav-link.active {
        background-color: var(--winter-bg-medium);
    }
}

@media (max-width: 720px) {
    #body {
        padding-left: 2em;
        padding-right: 2em;
    }

    .runner-image {
        display: none;
    }
}

/* Page title styling */
.page-title-container {
    background-color: #4a90e2;
    margin-bottom: 2rem;
    text-align: center;
}

/* Page title - Mobile first */
.page-title {
    font-size: var(--font-size-2xl);
    font-weight: 500;
    color: white;
    margin: 0;
    padding: 1rem 0;  /* Reduced padding */
}

/* Tablet and up (≥768px) */
@media (min-width: 768px) {
    .page-title {
        font-size: var(--font-size-2xl);
        padding: 1.25rem 0;  /* Slightly more padding on tablet */
    }
}

/* Desktop (≥992px) */
@media (min-width: 992px) {
    .page-title {
        font-size: var(--font-size-3xl);
        padding: 1.5rem 0;  /* Standard padding on desktop */
    }
}

.footer {
    background-color: var(--winter-bg-light);
    border-top: 1px solid var(--winter-bg-medium);
    margin-top: 3rem;
}

.footer p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer a {
    color: var(--winter-primary);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

.footer-logo img {
    height: 50px;
    max-width: 100%;
    object-fit: contain;
}


.footer-logos {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
}

@media (max-width: 768px) {
    .footer-logo img {
        height: 40px !important;
    }
}