/* CSS Reset & Basics */
:root {
    --bg-color: #212529;
    --text-color: #f8f9fa;
    --accent-color: #0d6efd;
    --card-bg: #fff;
    --card-text: #212529;
    --nav-bg: #212529;
    --nav-link-color: rgba(255, 255, 255, 0.55);
    --nav-link-hover: rgba(255, 255, 255, 0.75);
    --nav-link-active: #fff;
    --spacing-unit: 1rem;
    --border-radius: 0.375rem;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    text-decoration: none;
    color: inherit;
}

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

/* Layout Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-unit);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-unit);
}

.d-flex {
    display: flex;
}

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

.justify-content-center {
    justify-content: center;
}

.justify-content-between {
    justify-content: space-between;
}

.justify-content-end {
    justify-content: flex-end;
}

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

.h-100 {
    height: 100%;
}

.mt-5 {
    margin-top: 3rem;
}

.mb-0 {
    margin-bottom: 0;
}

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

.mt-4 {
    margin-top: 1.5rem;
}

.mx-auto {
    margin-left: auto;
    margin-right: auto;
}

.ms-auto {
    margin-left: auto;
}

.me-2 {
    margin-right: 0.5rem;
}

.py-5 {
    padding-top: 3rem;
    padding-bottom: 3rem;
}

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

.fw-bold {
    font-weight: 700;
}

.d-inline {
    display: inline;
}

.main-content {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}