/* CSS Variables */
:root {
    --color-sidebar-bg: #1a2b4c;
    --color-accent: #ff7a00;
    --color-sidebar-text: #ffffff;
    --color-content-bg: #ffffff;
    --sidebar-width: 60px;

    /* Additional useful variables */
    --color-text-primary: #333333;
    --color-text-secondary: #666666;
    --color-border: #e0e0e0;
    --color-error: #dc3545;
    --color-success: #28a745;
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --transition-speed: 0.2s;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--color-text-primary);
    background-color: var(--color-content-bg);
    min-height: 100vh;
}

/* Remove default list styles */
ul,
ol {
    list-style: none;
}

/* Remove default link styles */
a {
    text-decoration: none;
    color: inherit;
}

/* Reset button styles */
button {
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* Reset input styles */
input,
select,
textarea {
    font-family: inherit;
    font-size: inherit;
}

/* Remove default image spacing */
img,
svg {
    display: block;
    max-width: 100%;
}

/* Base Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.25;
    margin-bottom: 0.5em;
}

h1 {
    font-size: 2rem;
}

h2 {
    font-size: 1.5rem;
}

h3 {
    font-size: 1.25rem;
}

h4 {
    font-size: 1rem;
}

p {
    margin-bottom: 1rem;
}

/* App container */
#app {
    min-height: 100vh;
}

/* Layout with sidebar */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 1.5rem;
    background-color: #f5f7fa;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-height: 100vh;
    overflow: hidden;
}

/* Page header */
.page-header {
    margin-bottom: 2rem;
}

.page-title {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

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

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

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

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }