:root {
    --white: #fff;
    --black: #000;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    --red: #dc3545;
    --orange: #fd7e14;
    --yellow: #ffc107;
    --green: #198754;
    --teal: #20c997;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
}

body {
    line-height: 1.5;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
input,
textarea {
    font: inherit;
}

button {
    cursor: pointer;
}

code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.container {
    width: min(100% - 2rem, 1200px);
    margin: 0 auto;
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin: calc(var(--gutter-y, 0) * -0.5) calc(var(--gutter-x, 0) * -0.5);
}

.row > * {
    width: 100%;
    padding: calc(var(--gutter-y, 0) * 0.5) calc(var(--gutter-x, 0) * 0.5);
}

.g-2 {
    --gutter-x: 0.5rem;
    --gutter-y: 0.5rem;
}

.g-3 {
    --gutter-x: 1rem;
    --gutter-y: 1rem;
}

.col-md-2,
.col-md-3,
.col-md-4,
.col-md-6,
.col-lg-6,
.col-xl-3 {
    flex: 0 0 100%;
    max-width: 100%;
}

@media (min-width: 768px) {
    .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-6 { flex: 0 0 50%; max-width: 50%; }
}

@media (min-width: 992px) {
    .col-lg-6 { flex: 0 0 50%; max-width: 50%; }
}

@media (min-width: 1200px) {
    .col-xl-3 { flex: 0 0 25%; max-width: 25%; }
}

.d-block { display: block; }
.d-flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.flex-grow-1 { flex-grow: 1; }
.justify-content-between { justify-content: space-between; }
.justify-content-center { justify-content: center; }
.align-items-center { align-items: center; }
.align-items-end { align-items: flex-end; }
.text-center { text-align: center; }
.text-end { text-align: end; }
.text-uppercase { text-transform: uppercase; }
.fw-semibold { font-weight: 600; }
.small { font-size: 0.875rem; }
.h3, .h4, .h6 { margin: 0; font-weight: 600; line-height: 1.2; }
.h3 { font-size: 1.75rem; }
.h4 { font-size: 1.5rem; }
.h6 { font-size: 1rem; }
.fs-5 { font-size: 1.25rem; }
.fs-6 { font-size: 1rem; }

.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 1rem; }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mt-3 { margin-top: 1rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-3 { padding-top: 1rem; padding-bottom: 1rem; }
.py-4 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
.p-3 { padding: 1rem; }
.w-100 { width: 100%; }
.rounded { border-radius: 0.5rem; }
.sticky-top { position: sticky; top: 0; z-index: 1020; }
.border-bottom { border-bottom: 1px solid rgba(255, 255, 255, 0.08); }

.text-light { color: var(--gray-100); }
.text-secondary { color: var(--gray-500); }
.text-danger { color: #ff7b89; }
.bg-dark { background: rgba(0, 0, 0, 0.35); }
.bg-black { background: rgba(0, 0, 0, 0.55); }
.bg-danger { background: rgba(220, 53, 69, 0.9); color: var(--white); }
.bg-secondary { background: rgba(108, 117, 125, 0.95); color: var(--white); }
.bg-success { background: rgba(25, 135, 84, 0.95); color: var(--white); }
.border-secondary { border-color: rgba(255, 255, 255, 0.14); }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.65rem 1rem;
    border-radius: 0.6rem;
    border: 1px solid transparent;
    background: transparent;
    color: var(--white);
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn-sm {
    padding: 0.45rem 0.8rem;
    font-size: 0.875rem;
}

.btn-danger {
    background: var(--red);
    border-color: var(--red);
}

.btn-success {
    background: var(--green);
    border-color: var(--green);
}

.btn-warning {
    background: var(--yellow);
    border-color: var(--yellow);
    color: var(--gray-900);
}

.btn-outline-light {
    border-color: rgba(255, 255, 255, 0.35);
}

.btn-outline-danger {
    border-color: rgba(220, 53, 69, 0.75);
    color: #ff9ba6;
}

.btn-outline-secondary {
    border-color: rgba(173, 181, 189, 0.5);
    color: var(--gray-200);
}

.form-label,
.form-text {
    display: block;
}

.form-label {
    margin-bottom: 0.35rem;
}

.form-text {
    margin-top: 0.35rem;
    font-size: 0.875rem;
}

.form-control {
    width: 100%;
    padding: 0.7rem 0.85rem;
    border-radius: 0.6rem;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(0, 0, 0, 0.35);
    color: var(--gray-100);
}

.form-control:focus {
    outline: 2px solid rgba(255, 90, 61, 0.35);
    border-color: rgba(255, 90, 61, 0.55);
}

.form-control-sm {
    padding: 0.55rem 0.7rem;
    font-size: 0.875rem;
}

.alert {
    position: relative;
    padding: 0.8rem 1rem;
    border-radius: 0.75rem;
    border: 1px solid transparent;
    margin-bottom: 1rem;
}

.alert-warning {
    background: rgba(255, 193, 7, 0.14);
    border-color: rgba(255, 193, 7, 0.35);
    color: #ffe28a;
}

.alert-danger {
    background: rgba(220, 53, 69, 0.14);
    border-color: rgba(220, 53, 69, 0.35);
    color: #ff9ba6;
}

.alert-success {
    background: rgba(25, 135, 84, 0.14);
    border-color: rgba(25, 135, 84, 0.35);
    color: #8de5b6;
}

.badge {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    padding: 0.35rem 0.7rem;
    font-weight: 600;
}

.spinner-border {
    display: inline-block;
    width: 2rem;
    height: 2rem;
    border: 0.25em solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 0.75s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.modal {
    position: fixed;
    inset: 0;
    z-index: 1050;
    display: none;
    overflow-y: auto;
    padding: 1rem;
    background: rgba(0, 0, 0, 0.6);
}

.modal.show {
    display: block;
}

.modal-dialog {
    width: min(100%, 560px);
    margin: 2rem auto;
}

.modal-lg {
    width: min(100%, 900px);
}

.modal-dialog-scrollable .modal-content {
    max-height: calc(100vh - 4rem);
}

.modal-content {
    display: flex;
    flex-direction: column;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 1rem;
    overflow: hidden;
}

.modal-header,
.modal-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.25rem;
}

.modal-body {
    padding: 1rem 1.25rem;
    overflow-y: auto;
}

.btn-close {
    width: 2rem;
    height: 2rem;
    border: 0;
    border-radius: 999px;
    background: transparent;
    color: var(--gray-100);
    position: relative;
}

.btn-close::before,
.btn-close::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    width: 1rem;
    height: 2px;
    background: currentColor;
    transform-origin: center;
}

.btn-close::before {
    transform: translate(-50%, -50%) rotate(45deg);
}

.btn-close::after {
    transform: translate(-50%, -50%) rotate(-45deg);
}

.btn-close-white {
    color: var(--white);
}

textarea {
    resize: vertical;
}