/* Layout CSS - Grid Systems, Containers, and Responsive Design */

/* Container System */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.container-fluid {
    width: 100%;
    padding: 0 20px;
}

.container-small {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.container-large {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Grid System */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -15px;
}

.col {
    flex: 1;
    padding: 0 15px;
}

.col-1 { flex: 0 0 8.333333%; max-width: 8.333333%; padding: 0 15px; }
.col-2 { flex: 0 0 16.666667%; max-width: 16.666667%; padding: 0 15px; }
.col-3 { flex: 0 0 25%; max-width: 25%; padding: 0 15px; }
.col-4 { flex: 0 0 33.333333%; max-width: 33.333333%; padding: 0 15px; }
.col-5 { flex: 0 0 41.666667%; max-width: 41.666667%; padding: 0 15px; }
.col-6 { flex: 0 0 50%; max-width: 50%; padding: 0 15px; }
.col-7 { flex: 0 0 58.333333%; max-width: 58.333333%; padding: 0 15px; }
.col-8 { flex: 0 0 66.666667%; max-width: 66.666667%; padding: 0 15px; }
.col-9 { flex: 0 0 75%; max-width: 75%; padding: 0 15px; }
.col-10 { flex: 0 0 83.333333%; max-width: 83.333333%; padding: 0 15px; }
.col-11 { flex: 0 0 91.666667%; max-width: 91.666667%; padding: 0 15px; }
.col-12 { flex: 0 0 100%; max-width: 100%; padding: 0 15px; }

/* Flexbox Utilities */
.d-flex {
    display: flex;
}

.d-inline-flex {
    display: inline-flex;
}

.d-block {
    display: block;
}

.d-inline-block {
    display: inline-block;
}

.d-none {
    display: none;
}

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

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

.flex-wrap {
    flex-wrap: wrap;
}

.flex-nowrap {
    flex-wrap: nowrap;
}

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

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

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

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

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

.align-items-start {
    align-items: flex-start;
}

.align-items-end {
    align-items: flex-end;
}

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

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

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

/* Spacing Utilities */
.m-0 { margin: 0; }
.m-1 { margin: 0.25rem; }
.m-2 { margin: 0.5rem; }
.m-3 { margin: 1rem; }
.m-4 { margin: 1.5rem; }
.m-5 { margin: 3rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 3rem; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 3rem; }

.ml-0 { margin-left: 0; }
.ml-1 { margin-left: 0.25rem; }
.ml-2 { margin-left: 0.5rem; }
.ml-3 { margin-left: 1rem; }
.ml-4 { margin-left: 1.5rem; }
.ml-5 { margin-left: 3rem; }

.mr-0 { margin-right: 0; }
.mr-1 { margin-right: 0.25rem; }
.mr-2 { margin-right: 0.5rem; }
.mr-3 { margin-right: 1rem; }
.mr-4 { margin-right: 1.5rem; }
.mr-5 { margin-right: 3rem; }

.p-0 { padding: 0; }
.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 1rem; }
.p-4 { padding: 1.5rem; }
.p-5 { padding: 3rem; }

.pt-0 { padding-top: 0; }
.pt-1 { padding-top: 0.25rem; }
.pt-2 { padding-top: 0.5rem; }
.pt-3 { padding-top: 1rem; }
.pt-4 { padding-top: 1.5rem; }
.pt-5 { padding-top: 3rem; }

.pb-0 { padding-bottom: 0; }
.pb-1 { padding-bottom: 0.25rem; }
.pb-2 { padding-bottom: 0.5rem; }
.pb-3 { padding-bottom: 1rem; }
.pb-4 { padding-bottom: 1.5rem; }
.pb-5 { padding-bottom: 3rem; }

.pl-0 { padding-left: 0; }
.pl-1 { padding-left: 0.25rem; }
.pl-2 { padding-left: 0.5rem; }
.pl-3 { padding-left: 1rem; }
.pl-4 { padding-left: 1.5rem; }
.pl-5 { padding-left: 3rem; }

.pr-0 { padding-right: 0; }
.pr-1 { padding-right: 0.25rem; }
.pr-2 { padding-right: 0.5rem; }
.pr-3 { padding-right: 1rem; }
.pr-4 { padding-right: 1.5rem; }
.pr-5 { padding-right: 3rem; }

/* Text Utilities */
.text-left {
    text-align: left;
}

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

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

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

.text-uppercase {
    text-transform: uppercase;
}

.text-lowercase {
    text-transform: lowercase;
}

.text-capitalize {
    text-transform: capitalize;
}

.font-weight-light {
    font-weight: 300;
}

.font-weight-normal {
    font-weight: 400;
}

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

.font-style-italic {
    font-style: italic;
}

/* Color Utilities */
.text-primary { color: #3498db; }
.text-secondary { color: #95a5a6; }
.text-success { color: #2ecc71; }
.text-danger { color: #e74c3c; }
.text-warning { color: #f39c12; }
.text-info { color: #17a2b8; }
.text-light { color: #f8f9fa; }
.text-dark { color: #343a40; }
.text-muted { color: #6c757d; }

.bg-primary { background-color: #3498db; }
.bg-secondary { background-color: #95a5a6; }
.bg-success { background-color: #2ecc71; }
.bg-danger { background-color: #e74c3c; }
.bg-warning { background-color: #f39c12; }
.bg-info { background-color: #17a2b8; }
.bg-light { background-color: #f8f9fa; }
.bg-dark { background-color: #343a40; }

/* Border Utilities */
.border { border: 1px solid #dee2e6; }
.border-top { border-top: 1px solid #dee2e6; }
.border-right { border-right: 1px solid #dee2e6; }
.border-bottom { border-bottom: 1px solid #dee2e6; }
.border-left { border-left: 1px solid #dee2e6; }

.border-0 { border: 0; }
.border-top-0 { border-top: 0; }
.border-right-0 { border-right: 0; }
.border-bottom-0 { border-bottom: 0; }
.border-left-0 { border-left: 0; }

.rounded { border-radius: 0.25rem; }
.rounded-top { border-top-left-radius: 0.25rem; border-top-right-radius: 0.25rem; }
.rounded-right { border-top-right-radius: 0.25rem; border-bottom-right-radius: 0.25rem; }
.rounded-bottom { border-bottom-right-radius: 0.25rem; border-bottom-left-radius: 0.25rem; }
.rounded-left { border-top-left-radius: 0.25rem; border-bottom-left-radius: 0.25rem; }
.rounded-circle { border-radius: 50%; }
.rounded-0 { border-radius: 0; }

/* Shadow Utilities */
.shadow-sm { box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075); }
.shadow { box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15); }
.shadow-lg { box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.175); }
.shadow-none { box-shadow: none; }

/* Position Utilities */
.position-static { position: static; }
.position-relative { position: relative; }
.position-absolute { position: absolute; }
.position-fixed { position: fixed; }
.position-sticky { position: sticky; }

/* Responsive Design */
@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    
    .col-sm-1 { flex: 0 0 8.333333%; max-width: 8.333333%; }
    .col-sm-2 { flex: 0 0 16.666667%; max-width: 16.666667%; }
    .col-sm-3 { flex: 0 0 25%; max-width: 25%; }
    .col-sm-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
    .col-sm-5 { flex: 0 0 41.666667%; max-width: 41.666667%; }
    .col-sm-6 { flex: 0 0 50%; max-width: 50%; }
    .col-sm-7 { flex: 0 0 58.333333%; max-width: 58.333333%; }
    .col-sm-8 { flex: 0 0 66.666667%; max-width: 66.666667%; }
    .col-sm-9 { flex: 0 0 75%; max-width: 75%; }
    .col-sm-10 { flex: 0 0 83.333333%; max-width: 83.333333%; }
    .col-sm-11 { flex: 0 0 91.666667%; max-width: 91.666667%; }
    .col-sm-12 { flex: 0 0 100%; max-width: 100%; }
    
    .d-sm-none { display: none; }
    .d-sm-block { display: block; }
    .d-sm-flex { display: flex; }
    
    .text-sm-left { text-align: left; }
    .text-sm-center { text-align: center; }
    .text-sm-right { text-align: right; }
}

@media (min-width: 577px) and (max-width: 768px) {
    .col-md-1 { flex: 0 0 8.333333%; max-width: 8.333333%; }
    .col-md-2 { flex: 0 0 16.666667%; max-width: 16.666667%; }
    .col-md-3 { flex: 0 0 25%; max-width: 25%; }
    .col-md-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
    .col-md-5 { flex: 0 0 41.666667%; max-width: 41.666667%; }
    .col-md-6 { flex: 0 0 50%; max-width: 50%; }
    .col-md-7 { flex: 0 0 58.333333%; max-width: 58.333333%; }
    .col-md-8 { flex: 0 0 66.666667%; max-width: 66.666667%; }
    .col-md-9 { flex: 0 0 75%; max-width: 75%; }
    .col-md-10 { flex: 0 0 83.333333%; max-width: 83.333333%; }
    .col-md-11 { flex: 0 0 91.666667%; max-width: 91.666667%; }
    .col-md-12 { flex: 0 0 100%; max-width: 100%; }
    
    .d-md-none { display: none; }
    .d-md-block { display: block; }
    .d-md-flex { display: flex; }
    
    .text-md-left { text-align: left; }
    .text-md-center { text-align: center; }
    .text-md-right { text-align: right; }
}

@media (min-width: 769px) and (max-width: 992px) {
    .col-lg-1 { flex: 0 0 8.333333%; max-width: 8.333333%; }
    .col-lg-2 { flex: 0 0 16.666667%; max-width: 16.666667%; }
    .col-lg-3 { flex: 0 0 25%; max-width: 25%; }
    .col-lg-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
    .col-lg-5 { flex: 0 0 41.666667%; max-width: 41.666667%; }
    .col-lg-6 { flex: 0 0 50%; max-width: 50%; }
    .col-lg-7 { flex: 0 0 58.333333%; max-width: 58.333333%; }
    .col-lg-8 { flex: 0 0 66.666667%; max-width: 66.666667%; }
    .col-lg-9 { flex: 0 0 75%; max-width: 75%; }
    .col-lg-10 { flex: 0 0 83.333333%; max-width: 83.333333%; }
    .col-lg-11 { flex: 0 0 91.666667%; max-width: 91.666667%; }
    .col-lg-12 { flex: 0 0 100%; max-width: 100%; }
    
    .d-lg-none { display: none; }
    .d-lg-block { display: block; }
    .d-lg-flex { display: flex; }
    
    .text-lg-left { text-align: left; }
    .text-lg-center { text-align: center; }
    .text-lg-right { text-align: right; }
}

@media (min-width: 993px) {
    .col-xl-1 { flex: 0 0 8.333333%; max-width: 8.333333%; }
    .col-xl-2 { flex: 0 0 16.666667%; max-width: 16.666667%; }
    .col-xl-3 { flex: 0 0 25%; max-width: 25%; }
    .col-xl-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
    .col-xl-5 { flex: 0 0 41.666667%; max-width: 41.666667%; }
    .col-xl-6 { flex: 0 0 50%; max-width: 50%; }
    .col-xl-7 { flex: 0 0 58.333333%; max-width: 58.333333%; }
    .col-xl-8 { flex: 0 0 66.666667%; max-width: 66.666667%; }
    .col-xl-9 { flex: 0 0 75%; max-width: 75%; }
    .col-xl-10 { flex: 0 0 83.333333%; max-width: 83.333333%; }
    .col-xl-11 { flex: 0 0 91.666667%; max-width: 91.666667%; }
    .col-xl-12 { flex: 0 0 100%; max-width: 100%; }
    
    .d-xl-none { display: none; }
    .d-xl-block { display: block; }
    .d-xl-flex { display: flex; }
    
    .text-xl-left { text-align: left; }
    .text-xl-center { text-align: center; }
    .text-xl-right { text-align: right; }
}

/* Custom Section Layouts */
.section {
    padding: 60px 0;
}

.section-large {
    padding: 100px 0;
}

.section-small {
    padding: 40px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-title {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 20px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: #7f8c8d;
    max-width: 600px;
    margin: 0 auto;
}

/* Visibility Utilities */
.visible { visibility: visible; }
.invisible { visibility: hidden; }

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

/* Overflow Utilities */
.overflow-auto { overflow: auto; }
.overflow-hidden { overflow: hidden; }
.overflow-visible { overflow: visible; }
.overflow-scroll { overflow: scroll; }

/* Width and Height Utilities */
.w-25 { width: 25%; }
.w-50 { width: 50%; }
.w-75 { width: 75%; }
.w-100 { width: 100%; }
.w-auto { width: auto; }

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

.mw-100 { max-width: 100%; }
.mh-100 { max-height: 100%; }

.min-vw-100 { min-width: 100vw; }
.min-vh-100 { min-height: 100vh; }

.vw-100 { width: 100vw; }
.vh-100 { height: 100vh; }