/* ====== BASE.CSS ======
 * Core styling for the Invoice Management System
 * This file contains global base styles that are used throughout the application
 */

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

/* Base document styling */
html {
    font-size: 16px;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main), sans-serif;
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-background);
    min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin-bottom: var(--spacing-4);
    font-weight: 500;
    line-height: 1.2;
    color: var(--color-text);
}

h1 {
    font-size: var(--font-size-3xl);
}

h2 {
    font-size: var(--font-size-2xl);
}

h3 {
    font-size: var(--font-size-xl);
}

h4 {
    font-size: var(--font-size-lg);
}

h5 {
    font-size: var(--font-size-base);
    font-weight: 600;
}

h6 {
    font-size: var(--font-size-sm);
    font-weight: 600;
}

p {
    margin-bottom: var(--spacing-4);
}

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

a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

strong, b {
    font-weight: 600;
}

em, i {
    font-style: italic;
}

small {
    font-size: var(--font-size-sm);
}

code, pre {
    font-family: var(--font-mono);
    background-color: var(--color-gray-100);
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--border-radius);
}

pre {
    padding: var(--spacing-3);
    margin-bottom: var(--spacing-4);
    overflow-x: auto;
}

hr {
    margin: var(--spacing-6) 0;
    border: 0;
    border-top: 1px solid var(--color-border);
}

/* Lists */
ul, ol {
    margin-bottom: var(--spacing-4);
    padding-left: var(--spacing-5);
}

li {
    margin-bottom: var(--spacing-2);
}

/* Containers */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-4);
}

/* Common utility classes */
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.text-warning { color: var(--color-warning); }
.text-info { color: var(--color-info); }
.text-muted { color: var(--color-text-muted); }

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

.font-weight-normal { font-weight: 400; }
.font-weight-bold { font-weight: 700; }
.font-italic { font-style: italic; }
.font-monospace { font-family: var(--font-mono); }

.bg-primary { background-color: var(--color-primary); color: var(--color-white); }
.bg-secondary { background-color: var(--color-secondary); color: var(--color-white); }
.bg-success { background-color: var(--color-success); color: var(--color-white); }
.bg-danger { background-color: var(--color-danger); color: var(--color-white); }
.bg-warning { background-color: var(--color-warning); color: var(--color-white); }
.bg-info { background-color: var(--color-info); color: var(--color-white); }
.bg-light { background-color: var(--color-gray-100); }
.bg-dark { background-color: var(--color-gray-800); color: var(--color-white); }

.d-none { display: none !important; }
.d-inline { display: inline !important; }
.d-inline-block { display: inline-block !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.d-grid { display: grid !important; }

.flex-row { flex-direction: row !important; }
.flex-column { flex-direction: column !important; }
.flex-wrap { flex-wrap: wrap !important; }
.flex-nowrap { flex-wrap: nowrap !important; }
.flex-fill { flex: 1 1 auto !important; }
.justify-content-start { justify-content: flex-start !important; }
.justify-content-end { justify-content: flex-end !important; }
.justify-content-center { justify-content: center !important; }
.justify-content-between { justify-content: space-between !important; }
.justify-content-around { justify-content: space-around !important; }
.align-items-start { align-items: flex-start !important; }
.align-items-end { align-items: flex-end !important; }
.align-items-center { align-items: center !important; }
.align-items-baseline { align-items: baseline !important; }
.align-items-stretch { align-items: stretch !important; }

.m-0 { margin: var(--spacing-0) !important; }
.m-1 { margin: var(--spacing-1) !important; }
.m-2 { margin: var(--spacing-2) !important; }
.m-3 { margin: var(--spacing-3) !important; }
.m-4 { margin: var(--spacing-4) !important; }
.m-5 { margin: var(--spacing-5) !important; }

.mt-0 { margin-top: var(--spacing-0) !important; }
.mt-1 { margin-top: var(--spacing-1) !important; }
.mt-2 { margin-top: var(--spacing-2) !important; }
.mt-3 { margin-top: var(--spacing-3) !important; }
.mt-4 { margin-top: var(--spacing-4) !important; }
.mt-5 { margin-top: var(--spacing-5) !important; }

.mb-0 { margin-bottom: var(--spacing-0) !important; }
.mb-1 { margin-bottom: var(--spacing-1) !important; }
.mb-2 { margin-bottom: var(--spacing-2) !important; }
.mb-3 { margin-bottom: var(--spacing-3) !important; }
.mb-4 { margin-bottom: var(--spacing-4) !important; }
.mb-5 { margin-bottom: var(--spacing-5) !important; }

.ml-0 { margin-left: var(--spacing-0) !important; }
.ml-1 { margin-left: var(--spacing-1) !important; }
.ml-2 { margin-left: var(--spacing-2) !important; }
.ml-3 { margin-left: var(--spacing-3) !important; }
.ml-4 { margin-left: var(--spacing-4) !important; }
.ml-5 { margin-left: var(--spacing-5) !important; }

.mr-0 { margin-right: var(--spacing-0) !important; }
.mr-1 { margin-right: var(--spacing-1) !important; }
.mr-2 { margin-right: var(--spacing-2) !important; }
.mr-3 { margin-right: var(--spacing-3) !important; }
.mr-4 { margin-right: var(--spacing-4) !important; }
.mr-5 { margin-right: var(--spacing-5) !important; }

.mx-0 { margin-left: var(--spacing-0) !important; margin-right: var(--spacing-0) !important; }
.mx-1 { margin-left: var(--spacing-1) !important; margin-right: var(--spacing-1) !important; }
.mx-2 { margin-left: var(--spacing-2) !important; margin-right: var(--spacing-2) !important; }
.mx-3 { margin-left: var(--spacing-3) !important; margin-right: var(--spacing-3) !important; }
.mx-4 { margin-left: var(--spacing-4) !important; margin-right: var(--spacing-4) !important; }
.mx-5 { margin-left: var(--spacing-5) !important; margin-right: var(--spacing-5) !important; }
.mx-auto { margin-left: auto !important; margin-right: auto !important; }

.my-0 { margin-top: var(--spacing-0) !important; margin-bottom: var(--spacing-0) !important; }
.my-1 { margin-top: var(--spacing-1) !important; margin-bottom: var(--spacing-1) !important; }
.my-2 { margin-top: var(--spacing-2) !important; margin-bottom: var(--spacing-2) !important; }
.my-3 { margin-top: var(--spacing-3) !important; margin-bottom: var(--spacing-3) !important; }
.my-4 { margin-top: var(--spacing-4) !important; margin-bottom: var(--spacing-4) !important; }
.my-5 { margin-top: var(--spacing-5) !important; margin-bottom: var(--spacing-5) !important; }

.p-0 { padding: var(--spacing-0) !important; }
.p-1 { padding: var(--spacing-1) !important; }
.p-2 { padding: var(--spacing-2) !important; }
.p-3 { padding: var(--spacing-3) !important; }
.p-4 { padding: var(--spacing-4) !important; }
.p-5 { padding: var(--spacing-5) !important; }

.pt-0 { padding-top: var(--spacing-0) !important; }
.pt-1 { padding-top: var(--spacing-1) !important; }
.pt-2 { padding-top: var(--spacing-2) !important; }
.pt-3 { padding-top: var(--spacing-3) !important; }
.pt-4 { padding-top: var(--spacing-4) !important; }
.pt-5 { padding-top: var(--spacing-5) !important; }

.pb-0 { padding-bottom: var(--spacing-0) !important; }
.pb-1 { padding-bottom: var(--spacing-1) !important; }
.pb-2 { padding-bottom: var(--spacing-2) !important; }
.pb-3 { padding-bottom: var(--spacing-3) !important; }
.pb-4 { padding-bottom: var(--spacing-4) !important; }
.pb-5 { padding-bottom: var(--spacing-5) !important; }

.pl-0 { padding-left: var(--spacing-0) !important; }
.pl-1 { padding-left: var(--spacing-1) !important; }
.pl-2 { padding-left: var(--spacing-2) !important; }
.pl-3 { padding-left: var(--spacing-3) !important; }
.pl-4 { padding-left: var(--spacing-4) !important; }
.pl-5 { padding-left: var(--spacing-5) !important; }

.pr-0 { padding-right: var(--spacing-0) !important; }
.pr-1 { padding-right: var(--spacing-1) !important; }
.pr-2 { padding-right: var(--spacing-2) !important; }
.pr-3 { padding-right: var(--spacing-3) !important; }
.pr-4 { padding-right: var(--spacing-4) !important; }
.pr-5 { padding-right: var(--spacing-5) !important; }

.px-0 { padding-left: var(--spacing-0) !important; padding-right: var(--spacing-0) !important; }
.px-1 { padding-left: var(--spacing-1) !important; padding-right: var(--spacing-1) !important; }
.px-2 { padding-left: var(--spacing-2) !important; padding-right: var(--spacing-2) !important; }
.px-3 { padding-left: var(--spacing-3) !important; padding-right: var(--spacing-3) !important; }
.px-4 { padding-left: var(--spacing-4) !important; padding-right: var(--spacing-4) !important; }
.px-5 { padding-left: var(--spacing-5) !important; padding-right: var(--spacing-5) !important; }

.py-0 { padding-top: var(--spacing-0) !important; padding-bottom: var(--spacing-0) !important; }
.py-1 { padding-top: var(--spacing-1) !important; padding-bottom: var(--spacing-1) !important; }
.py-2 { padding-top: var(--spacing-2) !important; padding-bottom: var(--spacing-2) !important; }
.py-3 { padding-top: var(--spacing-3) !important; padding-bottom: var(--spacing-3) !important; }
.py-4 { padding-top: var(--spacing-4) !important; padding-bottom: var(--spacing-4) !important; }
.py-5 { padding-top: var(--spacing-5) !important; padding-bottom: var(--spacing-5) !important; }

.w-25 { width: 25% !important; }
.w-50 { width: 50% !important; }
.w-75 { width: 75% !important; }
.w-100 { width: 100% !important; }
.w-auto { width: auto !important; }

.h-25 { height: 25% !important; }
.h-50 { height: 50% !important; }
.h-75 { height: 75% !important; }
.h-100 { height: 100% !important; }
.h-auto { height: auto !important; }

.rounded { border-radius: var(--border-radius) !important; }
.rounded-lg { border-radius: var(--border-radius-lg) !important; }
.rounded-circle { border-radius: 50% !important; }
.rounded-pill { border-radius: var(--border-radius-full) !important; }

.border { border: 1px solid var(--color-border) !important; }
.border-0 { border: 0 !important; }
.border-top { border-top: 1px solid var(--color-border) !important; }
.border-right { border-right: 1px solid var(--color-border) !important; }
.border-bottom { border-bottom: 1px solid var(--color-border) !important; }
.border-left { border-left: 1px solid var(--color-border) !important; }

.shadow-none { box-shadow: none !important; }
.shadow-sm { box-shadow: var(--box-shadow-sm) !important; }
.shadow { box-shadow: var(--box-shadow) !important; }
.shadow-md { box-shadow: var(--box-shadow-md) !important; }
.shadow-lg { box-shadow: var(--box-shadow-lg) !important; }

.position-static { position: static !important; }
.position-relative { position: relative !important; }
.position-absolute { position: absolute !important; }
.position-fixed { position: fixed !important; }
.position-sticky { position: sticky !important; }

.overflow-auto { overflow: auto !important; }
.overflow-hidden { overflow: hidden !important; }
.overflow-visible { overflow: visible !important; }
.overflow-scroll { overflow: scroll !important; }

.visible { visibility: visible !important; }
.invisible { visibility: hidden !important; }

/* Badge styling */
.badge {
    display: inline-block;
    padding: var(--spacing-1) var(--spacing-2);
    font-size: var(--font-size-sm);
    font-weight: 700;
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: var(--border-radius);
}

/* Row and basic grid */
.row {
    display: flex;
    flex-wrap: wrap;
    margin-right: calc(var(--spacing-2) * -1);
    margin-left: calc(var(--spacing-2) * -1);
}

[class*="col-"] {
    padding-right: var(--spacing-2);
    padding-left: var(--spacing-2);
    width: 100%;
}

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

.sr-only-focusable:focus {
    position: static;
    width: auto;
    height: auto;
    overflow: visible;
    clip: auto;
    white-space: normal;
}

/* Responsive breakpoints */
@media (min-width: 576px) {
    .container {
        max-width: 540px;
    }
}

@media (min-width: 768px) {
    .container {
        max-width: 720px;
    }
}

@media (min-width: 992px) {
    .container {
        max-width: 960px;
    }
}

@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
    }
}

@media (min-width: 1400px) {
    .container {
        max-width: 1320px;
    }
}