/*
 * Responsive Design System
 * Breakpoints and utilities for responsive layouts
 */

/* Breakpoint variables */
:root {
    --breakpoint-xs: 0;
    --breakpoint-sm: 576px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 992px;
    --breakpoint-xl: 1200px;
    --breakpoint-xxl: 1400px;
}

/* Container */
.container {
    width: 100%;
    margin-right: auto;
    margin-left: auto;
    padding-right: 1rem;
    padding-left: 1rem;
}

@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;
    }
}

.container-fluid {
    width: 100%;
    padding-right: 1rem;
    padding-left: 1rem;
    margin-right: auto;
    margin-left: auto;
}

/* Grid System */
.row {
    display: flex;
    flex-wrap: wrap;
    margin-right: -0.75rem;
    margin-left: -0.75rem;
}

.col {
    flex: 1 0 0%;
    padding-right: 0.75rem;
    padding-left: 0.75rem;
}

/* Column sizes */
.col-1 { flex: 0 0 auto; width: 8.333333%; padding-right: 0.75rem; padding-left: 0.75rem; }
.col-2 { flex: 0 0 auto; width: 16.666667%; padding-right: 0.75rem; padding-left: 0.75rem; }
.col-3 { flex: 0 0 auto; width: 25%; padding-right: 0.75rem; padding-left: 0.75rem; }
.col-4 { flex: 0 0 auto; width: 33.333333%; padding-right: 0.75rem; padding-left: 0.75rem; }
.col-5 { flex: 0 0 auto; width: 41.666667%; padding-right: 0.75rem; padding-left: 0.75rem; }
.col-6 { flex: 0 0 auto; width: 50%; padding-right: 0.75rem; padding-left: 0.75rem; }
.col-7 { flex: 0 0 auto; width: 58.333333%; padding-right: 0.75rem; padding-left: 0.75rem; }
.col-8 { flex: 0 0 auto; width: 66.666667%; padding-right: 0.75rem; padding-left: 0.75rem; }
.col-9 { flex: 0 0 auto; width: 75%; padding-right: 0.75rem; padding-left: 0.75rem; }
.col-10 { flex: 0 0 auto; width: 83.333333%; padding-right: 0.75rem; padding-left: 0.75rem; }
.col-11 { flex: 0 0 auto; width: 91.666667%; padding-right: 0.75rem; padding-left: 0.75rem; }
.col-12 { flex: 0 0 auto; width: 100%; padding-right: 0.75rem; padding-left: 0.75rem; }

/* Responsive columns */
.col-sm,
.col-md,
.col-lg,
.col-xl,
.col-xxl {
    position: relative;
    width: 100%;
    padding-right: 0.75rem;
    padding-left: 0.75rem;
}

/* Small devices (≥576px) */
@media (min-width: 576px) {
    .col-sm {
        flex: 1 0 0%;
    }
    .col-sm-auto {
        flex: 0 0 auto;
        width: auto;
    }
    .col-sm-1 { flex: 0 0 auto; width: 8.333333%; }
    .col-sm-2 { flex: 0 0 auto; width: 16.666667%; }
    .col-sm-3 { flex: 0 0 auto; width: 25%; }
    .col-sm-4 { flex: 0 0 auto; width: 33.333333%; }
    .col-sm-5 { flex: 0 0 auto; width: 41.666667%; }
    .col-sm-6 { flex: 0 0 auto; width: 50%; }
    .col-sm-7 { flex: 0 0 auto; width: 58.333333%; }
    .col-sm-8 { flex: 0 0 auto; width: 66.666667%; }
    .col-sm-9 { flex: 0 0 auto; width: 75%; }
    .col-sm-10 { flex: 0 0 auto; width: 83.333333%; }
    .col-sm-11 { flex: 0 0 auto; width: 91.666667%; }
    .col-sm-12 { flex: 0 0 auto; width: 100%; }
}

/* Medium devices (≥768px) */
@media (min-width: 768px) {
    .col-md {
        flex: 1 0 0%;
    }
    .col-md-auto {
        flex: 0 0 auto;
        width: auto;
    }
    .col-md-1 { flex: 0 0 auto; width: 8.333333%; }
    .col-md-2 { flex: 0 0 auto; width: 16.666667%; }
    .col-md-3 { flex: 0 0 auto; width: 25%; }
    .col-md-4 { flex: 0 0 auto; width: 33.333333%; }
    .col-md-5 { flex: 0 0 auto; width: 41.666667%; }
    .col-md-6 { flex: 0 0 auto; width: 50%; }
    .col-md-7 { flex: 0 0 auto; width: 58.333333%; }
    .col-md-8 { flex: 0 0 auto; width: 66.666667%; }
    .col-md-9 { flex: 0 0 auto; width: 75%; }
    .col-md-10 { flex: 0 0 auto; width: 83.333333%; }
    .col-md-11 { flex: 0 0 auto; width: 91.666667%; }
    .col-md-12 { flex: 0 0 auto; width: 100%; }
}

/* Large devices (≥992px) */
@media (min-width: 992px) {
    .col-lg {
        flex: 1 0 0%;
    }
    .col-lg-auto {
        flex: 0 0 auto;
        width: auto;
    }
    .col-lg-1 { flex: 0 0 auto; width: 8.333333%; }
    .col-lg-2 { flex: 0 0 auto; width: 16.666667%; }
    .col-lg-3 { flex: 0 0 auto; width: 25%; }
    .col-lg-4 { flex: 0 0 auto; width: 33.333333%; }
    .col-lg-5 { flex: 0 0 auto; width: 41.666667%; }
    .col-lg-6 { flex: 0 0 auto; width: 50%; }
    .col-lg-7 { flex: 0 0 auto; width: 58.333333%; }
    .col-lg-8 { flex: 0 0 auto; width: 66.666667%; }
    .col-lg-9 { flex: 0 0 auto; width: 75%; }
    .col-lg-10 { flex: 0 0 auto; width: 83.333333%; }
    .col-lg-11 { flex: 0 0 auto; width: 91.666667%; }
    .col-lg-12 { flex: 0 0 auto; width: 100%; }
}

/* Display utilities */
.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-inline-flex { display: inline-flex !important; }
.d-grid { display: grid !important; }

/* Responsive display */
@media (min-width: 576px) {
    .d-sm-none { display: none !important; }
    .d-sm-inline { display: inline !important; }
    .d-sm-inline-block { display: inline-block !important; }
    .d-sm-block { display: block !important; }
    .d-sm-flex { display: flex !important; }
    .d-sm-inline-flex { display: inline-flex !important; }
    .d-sm-grid { display: grid !important; }
}

@media (min-width: 768px) {
    .d-md-none { display: none !important; }
    .d-md-inline { display: inline !important; }
    .d-md-inline-block { display: inline-block !important; }
    .d-md-block { display: block !important; }
    .d-md-flex { display: flex !important; }
    .d-md-inline-flex { display: inline-flex !important; }
    .d-md-grid { display: grid !important; }
}

@media (min-width: 992px) {
    .d-lg-none { display: none !important; }
    .d-lg-inline { display: inline !important; }
    .d-lg-inline-block { display: inline-block !important; }
    .d-lg-block { display: block !important; }
    .d-lg-flex { display: flex !important; }
    .d-lg-inline-flex { display: inline-flex !important; }
    .d-lg-grid { display: grid !important; }
}

@media (min-width: 1200px) {
    .d-xl-none { display: none !important; }
    .d-xl-inline { display: inline !important; }
    .d-xl-inline-block { display: inline-block !important; }
    .d-xl-block { display: block !important; }
    .d-xl-flex { display: flex !important; }
    .d-xl-inline-flex { display: inline-flex !important; }
    .d-xl-grid { display: grid !important; }
}

/* Mobile navigation */
.navbar-toggler {
    display: none;
    padding: 0.25rem 0.75rem;
    font-size: 1.25rem;
    line-height: 1;
    background-color: transparent;
    border: 1px solid var(--theme-border);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-speed);
}

.navbar-toggler:hover {
    background-color: var(--theme-border);
}

.navbar-toggler-icon {
    display: inline-block;
    width: 1.5em;
    height: 1.5em;
    vertical-align: middle;
    background-repeat: no-repeat;
    background-position: center;
    background-size: 100%;
}

/* Hamburger icon */
.navbar-toggler-icon::before {
    content: "☰";
    font-size: 1.5rem;
    color: var(--theme-text-primary);
}

@media (max-width: 767px) {
    .navbar-toggler {
        display: inline-block;
    }
    
    .navbar-collapse {
        display: none;
        width: 100%;
    }
    
    .navbar-collapse.show {
        display: block;
    }
    
    .navbar-nav {
        flex-direction: column;
        width: 100%;
    }
    
    .navbar-nav .nav-item {
        width: 100%;
    }
}