/* Minimal Bootstrap-like CSS - Custom Implementation */

:root {
    --bs-primary: #0d6efd;
    --bs-secondary: #6c757d;
    --bs-success: #198754;
    --bs-danger: #dc3545;
    --bs-warning: #ffc107;
    --bs-info: #0dcaf0;
    --bs-light: #f8f9fa;
    --bs-dark: #212529;
    --bs-white: #fff;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 1rem;
    line-height: 1.5;
    color: #212529;
    background-color: #fff;
}

.container {
    width: 100%;
    padding-right: 15px;
    padding-left: 15px;
    margin-right: auto;
    margin-left: auto;
}

@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; }
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin-right: -15px;
    margin-left: -15px;
}

.col, [class*="col-"] {
    flex: 1 0 0%;
    padding-right: 15px;
    padding-left: 15px;
}

.col-md-1 { flex: 0 0 8.33333%; max-width: 8.33333%; }
.col-md-2 { flex: 0 0 16.66667%; max-width: 16.66667%; }
.col-md-3 { flex: 0 0 25%; max-width: 25%; }
.col-md-4 { flex: 0 0 33.33333%; max-width: 33.33333%; }
.col-md-6 { flex: 0 0 50%; max-width: 50%; }
.col-md-8 { flex: 0 0 66.66667%; max-width: 66.66667%; }
.col-md-9 { flex: 0 0 75%; max-width: 75%; }
.col-md-12 { flex: 0 0 100%; max-width: 100%; }

@media (min-width: 768px) {
    .col-lg-1 { flex: 0 0 8.33333%; max-width: 8.33333%; }
    .col-lg-2 { flex: 0 0 16.66667%; max-width: 16.66667%; }
    .col-lg-3 { flex: 0 0 25%; max-width: 25%; }
    .col-lg-4 { flex: 0 0 33.33333%; max-width: 33.33333%; }
    .col-lg-6 { flex: 0 0 50%; max-width: 50%; }
    .col-lg-8 { flex: 0 0 66.66667%; max-width: 66.66667%; }
    .col-lg-10 { flex: 0 0 83.33333%; max-width: 83.33333%; }
    .col-lg-12 { flex: 0 0 100%; max-width: 100%; }
}

/* Navbar */
.navbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 1rem;
}

.navbar-dark { background-color: var(--bs-dark) !important; }
.bg-dark { background-color: var(--bs-dark) !important; }
.bg-primary { background-color: var(--bs-primary) !important; }
.bg-light { background-color: var(--bs-light) !important; }

.fixed-top {
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    z-index: 1030;
}

.navbar-brand {
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--bs-white) !important;
    text-decoration: none;
}

.navbar-nav {
    display: flex;
    flex-direction: column;
    list-style: none;
    margin: 0;
    padding: 0;
}

.navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.75);
    text-decoration: none;
    padding: 0.5rem 1rem;
}

.navbar-nav .nav-link:hover {
    color: var(--bs-white);
}

.navbar-toggler {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0.25rem;
    padding: 0.25rem 0.75rem;
    color: var(--bs-white);
}

.navbar-toggler-icon {
    display: inline-block;
    width: 1.5em;
    height: 1.5em;
    vertical-align: middle;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.75%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: center;
    background-size: 100%;
}

@media (min-width: 992px) {
    .navbar-expand-lg .navbar-nav {
        flex-direction: row;
    }
    .navbar-expand-lg .navbar-toggler {
        display: none;
    }
    .ms-auto {
        margin-left: auto !important;
    }
}

.collapse:not(.show) {
    display: none;
}

@media (min-width: 992px) {
    .navbar-expand-lg .collapse {
        display: flex !important;
    }
}

/* Buttons */
.btn {
    display: inline-block;
    font-weight: 400;
    text-align: center;
    text-decoration: none;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    border: 1px solid transparent;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    line-height: 1.5;
    border-radius: 0.25rem;
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out;
}

.btn-primary {
    color: var(--bs-white);
    background-color: var(--bs-primary);
    border-color: var(--bs-primary);
}

.btn-primary:hover {
    background-color: #0b5ed7;
    border-color: #0a58ca;
}

.btn-outline-light {
    color: var(--bs-white);
    border-color: var(--bs-white);
    background: transparent;
}

.btn-outline-light:hover {
    color: var(--bs-dark);
    background-color: var(--bs-white);
}

.btn-outline-primary {
    color: var(--bs-primary);
    border-color: var(--bs-primary);
    background: transparent;
}

.btn-lg {
    padding: 0.5rem 1rem;
    font-size: 1.25rem;
    border-radius: 0.3rem;
}

/* Cards */
.card {
    position: relative;
    display: flex;
    flex-direction: column;
    min-width: 0;
    word-wrap: break-word;
    background-color: var(--bs-white);
    background-clip: border-box;
    border: 1px solid rgba(0, 0, 0, 0.125);
    border-radius: 0.25rem;
}

.card-header {
    padding: 0.5rem 1rem;
    margin-bottom: 0;
    background-color: rgba(0, 0, 0, 0.03);
    border-bottom: 1px solid rgba(0, 0, 0, 0.125);
}

.card-body {
    flex: 1 1 auto;
    padding: 1rem;
}

.card-title {
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
    font-weight: 500;
}

.card-text {
    margin-bottom: 1rem;
}

.card-img-top {
    width: 100%;
    border-top-left-radius: calc(0.25rem - 1px);
    border-top-right-radius: calc(0.25rem - 1px);
}

/* Forms */
.form-label {
    margin-bottom: 0.5rem;
}

.form-control, .form-select {
    display: block;
    width: 100%;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: #212529;
    background-color: var(--bs-white);
    background-image: none;
    border: 1px solid #ced4da;
    border-radius: 0.25rem;
    transition: border-color 0.15s ease-in-out;
}

.form-control:focus, .form-select:focus {
    color: #212529;
    background-color: var(--bs-white);
    border-color: #86b7fe;
    outline: 0;
}

/* Alerts */
.alert {
    position: relative;
    padding: 0.75rem 1.25rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    border-radius: 0.25rem;
}

.alert-success {
    color: #0f5132;
    background-color: #d1e7dd;
    border-color: #badbcc;
}

.alert-danger {
    color: #842029;
    background-color: #f8d7da;
    border-color: #f5c2c7;
}

.alert-warning {
    color: #664d03;
    background-color: #fff3cd;
    border-color: #ffecb5;
}

.alert-info {
    color: #055160;
    background-color: #cff4fc;
    border-color: #b6effb;
}

/* Utilities */
.text-center { text-align: center !important; }
.text-muted { color: #6c757d !important; }
.text-primary { color: var(--bs-primary) !important; }
.text-light { color: rgba(255, 255, 255, 0.9) !important; }
.text-success { color: var(--bs-success) !important; }
.text-danger { color: var(--bs-danger) !important; }
.text-white { color: var(--bs-white) !important; }

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

.mt-3 { margin-top: 1rem !important; }
.mt-4 { margin-top: 1.5rem !important; }
.mt-5 { margin-top: 3rem !important; }

.me-2 { margin-right: 0.5rem !important; }
.me-3 { margin-right: 1rem !important; }

.py-5 { padding-top: 3rem !important; padding-bottom: 3rem !important; }
.px-5 { padding-left: 3rem !important; padding-right: 3rem !important; }

.shadow { box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075) !important; }
.shadow-sm { box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075) !important; }

.rounded { border-radius: 0.25rem !important; }

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

.display-3 { font-size: calc(1.525rem + 3.3vw); font-weight: 300; line-height: 1.2; }
.display-4 { font-size: calc(1.475rem + 2.7vw); font-weight: 300; line-height: 1.2; }
.display-5 { font-size: calc(1.425rem + 2.1vw); font-weight: 300; line-height: 1.2; }

.lead {
    font-size: 1.25rem;
    font-weight: 300;
}

.list-unstyled {
    padding-left: 0;
    list-style: none;
}

.fw-bold { font-weight: 700 !important; }
.fs-5 { font-size: 1.25rem !important; }

hr {
    margin: 1rem 0;
    color: inherit;
    border: 0;
    border-top: 1px solid;
    opacity: 0.25;
}

.bg-light hr { border-top-color: rgba(0, 0, 0, 0.1); }

/* Badge */
.badge {
    display: inline-block;
    padding: 0.35em 0.65em;
    font-size: 0.75em;
    font-weight: 700;
    line-height: 1;
    color: var(--bs-white);
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: 0.25rem;
}

.bg-primary { background-color: var(--bs-primary) !important; }

/* Responsive images */
img {
    max-width: 100%;
    height: auto;
}

/* Min height utilities */
.min-vh-100 {
    min-height: 100vh;
}

/* Alignment */
.align-items-center {
    align-items: center !important;
}

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

/* Small text */
small, .small {
    font-size: 0.875em;
}

/* Border */
.border-bottom {
    border-bottom: 1px solid #dee2e6 !important;
}

.pb-2 {
    padding-bottom: 0.5rem !important;
}

/* Grid gap */
.g-4 > * {
    padding-right: 1rem;
    padding-left: 1rem;
    margin-bottom: 1.5rem;
}

.h-100 {
    height: 100% !important;
}

/* Button close */
.btn-close {
    box-sizing: content-box;
    width: 1em;
    height: 1em;
    padding: 0.25em 0.25em;
    color: #000;
    background: transparent url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23000'%3e%3cpath d='M.293.293a1 1 0 011.414 0L8 6.586 14.293.293a1 1 0 111.414 1.414L9.414 8l6.293 6.293a1 1 0 01-1.414 1.414L8 9.414l-6.293 6.293a1 1 0 01-1.414-1.414L6.586 8 .293 1.707a1 1 0 010-1.414z'/%3e%3c/svg%3e") center/1em auto no-repeat;
    border: 0;
    border-radius: 0.25rem;
    opacity: 0.5;
    cursor: pointer;
}

.btn-close:hover {
    opacity: 1;
}

.fade {
    transition: opacity 0.15s linear;
}

.fade:not(.show) {
    opacity: 0;
}

/* Flex utilities */
.d-flex {
    display: flex !important;
}

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

/* Invalid feedback */
.invalid-feedback {
    display: none;
    width: 100%;
    margin-top: 0.25rem;
    font-size: 0.875em;
    color: var(--bs-danger);
}

.was-validated .form-control:invalid ~ .invalid-feedback,
.was-validated .form-select:invalid ~ .invalid-feedback {
    display: block;
}

.was-validated .form-control:invalid,
.was-validated .form-select:invalid {
    border-color: var(--bs-danger);
}

/* JavaScript collapse functionality will be handled in main.js */