/* Gates-inspired theme */

:root {
    /* Gates brand colors */
    --gates-black: #1a1a1a;
    --gates-dark: #2d2d2d;
    --gates-red: #cc0000;
    --gates-red-hover: #a30000;
    --gates-gray-light: #f5f5f5;
    --gates-gray: #6c757d;
    --gates-gray-border: #dee2e6;
    --gates-white: #ffffff;
    --gates-text: #212529;
    --gates-text-muted: #6c757d;

    /* Bootstrap CSS variable overrides — apply Gates palette app-wide */
    --bs-primary: var(--gates-red);
    --bs-primary-rgb: 204, 0, 0;
    --bs-link-color: var(--gates-red);
    --bs-link-color-rgb: 204, 0, 0;
    --bs-link-hover-color: var(--gates-red-hover);
    --bs-link-hover-color-rgb: 163, 0, 0;
    --bs-focus-ring-color: rgba(204, 0, 0, 0.25);
}

html {
    font-size: 14px;
    position: relative;
    min-height: 100%;
}

@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
}

body {
    margin: 0;
    padding-bottom: 60px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    color: var(--gates-text);
    background-color: var(--gates-white);
}

/* ── Navbar ─────────────────────────────────────────── */
.navbar-gates {
    background-color: var(--gates-black) !important;
    padding: 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

.navbar-gates .container-fluid {
    padding: 0 1.5rem;
}

.navbar-gates .navbar-brand {
    color: var(--gates-white) !important;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    white-space: normal;
    text-align: center;
    word-break: break-all;
    padding: 0.75rem 0;
    margin-right: 2rem;
}

.navbar-gates .navbar-brand:hover {
    color: var(--gates-red) !important;
}

.navbar-gates .navbar-nav {
    flex-direction: row;
    align-items: stretch;
}

.navbar-gates .navbar-nav .nav-item {
    display: flex;
    align-items: stretch;
    position: relative;
}

.navbar-gates .navbar-nav .nav-item::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background-color: transparent;
    transition: background-color 0.2s ease;
}

.navbar-gates .navbar-nav .nav-item:hover::after {
    background-color: var(--gates-red);
}

.navbar.navbar-expand-lg.navbar-gates .navbar-nav .nav-link,
.navbar-gates .navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.85) !important;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 1rem 1.25rem !important;
    transition: color 0.2s ease;
    display: flex;
    align-items: center;
}

.navbar-gates .navbar-nav .nav-link:hover,
.navbar-gates .navbar-nav .nav-link:focus {
    color: var(--gates-white) !important;
    background-color: transparent;
}

.navbar-gates .navbar-nav .nav-link.active {
    color: var(--gates-white) !important;
}

.navbar-gates .navbar-toggler {
    border-color: rgba(255, 255, 255, 0.3);
    margin: 0.5rem 0;
}

.navbar-gates .navbar-toggler-icon {
    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, 0.85%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ── Offcanvas ──────────────────────────────────────── */
.offcanvas-gates {
    background-color: var(--gates-black) !important;
    color: var(--gates-white);
}

.offcanvas-gates .offcanvas-header {
    border-bottom: 3px solid var(--gates-red);
    padding: 1rem 1.25rem;
}

.offcanvas-gates .nav-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.offcanvas-gates .nav-link {
    color: rgba(255, 255, 255, 0.85) !important;
    font-size: 1rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    padding: 0.75rem 0 !important;
}

.offcanvas-gates .nav-link:hover,
.offcanvas-gates .nav-link:focus {
    color: var(--gates-white) !important;
    padding-left: 0.5rem !important;
}

/* ── Dropdown ───────────────────────────────────────── */
.dropdown-menu-gates {
    background-color: var(--gates-white);
    border: none;
    border-radius: 0;
    border-top: 3px solid var(--gates-red);
    margin-top: 0;
    padding: 0.75rem 0;
    min-width: 260px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.dropdown-menu-gates .dropdown-item {
    color: var(--gates-text);
    font-size: 0.9rem;
    font-weight: 400;
    padding: 0.6rem 1.5rem;
}

.dropdown-menu-gates .dropdown-item:hover,
.dropdown-menu-gates .dropdown-item:focus {
    color: var(--gates-red);
    background-color: var(--gates-gray-light);
}

.dropdown-menu-gates .dropdown-item.active,
.dropdown-menu-gates .dropdown-item:active {
    color: var(--gates-white);
    background-color: var(--gates-red);
}

/* Mobile nav */
@media (max-width: 991.98px) {
    .navbar-gates .navbar-nav {
        flex-direction: column;
        align-items: stretch;
    }

    .navbar-gates .navbar-nav .nav-item::after {
        display: none;
    }
}

/* ── Red accent bar ─────────────────────────────────── */
.navbar-accent {
    height: 3px;
    background: linear-gradient(90deg, var(--gates-red) 0%, var(--gates-red-hover) 100%);
}

/* ── Main content ───────────────────────────────────── */
main {
    min-height: calc(100vh - 200px);
}

/* ── Page headers ───────────────────────────────────── */
h1 {
    font-weight: 700;
    color: var(--gates-black);
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 3px solid var(--gates-red);
    display: inline-block;
}

/* ── Links ──────────────────────────────────────────── */
a {
    color: var(--gates-red);
    text-decoration: none;
}

a:hover {
    color: var(--gates-red-hover);
    text-decoration: underline;
}

/* ── Buttons ────────────────────────────────────────── */
.btn-primary {
    --bs-btn-color: var(--gates-white);
    --bs-btn-bg: var(--gates-red);
    --bs-btn-border-color: var(--gates-red);
    --bs-btn-hover-color: var(--gates-white);
    --bs-btn-hover-bg: var(--gates-red-hover);
    --bs-btn-hover-border-color: var(--gates-red-hover);
    --bs-btn-active-bg: var(--gates-red-hover);
    --bs-btn-active-border-color: var(--gates-red-hover);
    --bs-btn-focus-shadow-rgb: 204, 0, 0;
    --bs-btn-disabled-bg: var(--gates-red);
    --bs-btn-disabled-border-color: var(--gates-red);
}

.btn-outline-primary {
    --bs-btn-color: var(--gates-red);
    --bs-btn-border-color: var(--gates-red);
    --bs-btn-hover-color: var(--gates-white);
    --bs-btn-hover-bg: var(--gates-red);
    --bs-btn-hover-border-color: var(--gates-red);
    --bs-btn-active-color: var(--gates-white);
    --bs-btn-active-bg: var(--gates-red);
    --bs-btn-active-border-color: var(--gates-red);
    --bs-btn-focus-shadow-rgb: 204, 0, 0;
}

/* Global focus ring — Gates red for all interactive elements */
.btn:focus-visible,
.btn:focus,
.form-control:focus,
.form-select:focus,
.form-check-input:focus,
.accordion-button:focus {
    outline: none;
    box-shadow: 0 0 0 0.25rem rgba(204, 0, 0, 0.25);
}

.btn-primary:focus,
.btn-primary:focus-visible {
    box-shadow: 0 0 0 0.25rem rgba(204, 0, 0, 0.4);
}

/* ── Form controls (global) ─────────────────────────── */
.form-control:focus {
    border-color: var(--gates-red);
}

.form-select:focus {
    border-color: var(--gates-red);
}

.form-check-input:checked {
    background-color: var(--gates-red);
    border-color: var(--gates-red);
}

/* ── Accordion ──────────────────────────────────────── */
.accordion-button:not(.collapsed) {
    color: var(--gates-red);
    background-color: rgba(204, 0, 0, 0.04);
    box-shadow: inset 0 -1px 0 rgba(0, 0, 0, 0.125);
}

/* Tint the collapse chevron to Gates red */
.accordion-button:not(.collapsed)::after {
    filter: invert(11%) sepia(93%) saturate(7496%) hue-rotate(1deg) brightness(95%) contrast(107%);
}

/* ── Nav pills ──────────────────────────────────────── */
.nav-pills .nav-link.active,
.nav-pills .show > .nav-link {
    color: var(--gates-white);
    background-color: var(--gates-red);
}

/* ── Calculator cards ───────────────────────────────── */
.calculator-card {
    border: none;
    border-radius: 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    height: 100%;
    overflow: hidden;
}

.calculator-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.calculator-card .card-header {
    background-color: var(--gates-black);
    color: var(--gates-white);
    font-weight: 600;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    padding: 1rem 1.25rem;
    border-bottom: 3px solid var(--gates-red);
    border-radius: 0;
}

.calculator-card .card-body {
    padding: 1.5rem 1.25rem;
    display: flex;
    flex-direction: column;
}

.calculator-card .card-text {
    color: var(--gates-text-muted);
    flex-grow: 1;
    margin-bottom: 1.25rem;
}

.calculator-card .btn {
    align-self: flex-start;
}

/* ── Footer ─────────────────────────────────────────── */
.footer-gates {
    background-color: var(--gates-black);
    color: rgba(255, 255, 255, 0.7);
    padding: 1.25rem 0;
    position: absolute;
    bottom: 0;
    width: 100%;
    white-space: nowrap;
}

.footer-gates a {
    color: rgba(255, 255, 255, 0.85);
}

.footer-gates a:hover {
    color: var(--gates-white);
    text-decoration: underline;
}

/* ── Utility ─────────────────────────────────────────── */
.border-top {
    border-top: 1px solid var(--gates-gray-border) !important;
}

.border-bottom {
    border-bottom: 1px solid var(--gates-gray-border) !important;
}

.text-gates-red {
    color: var(--gates-red) !important;
}

.bg-gates-dark {
    background-color: var(--gates-black) !important;
}

/* ── Page description ───────────────────────────────── */
.page-description {
    font-size: 1.1rem;
    color: var(--gates-text-muted);
    max-width: 800px;
    line-height: 1.7;
}

/* ── Floating label placeholders ────────────────────── */
.form-floating > .form-control-plaintext::placeholder,
.form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder,
.form-floating > .form-control:focus::placeholder {
    text-align: start;
}

/* ── Embed mode ──────────────────────────────────────── */
html.embed-html {
    height: 100%;
    overflow: auto;
}

.embed-mode {
    height: 100%;
    padding-bottom: 0;
    margin: 0;
    overflow: auto;
    background-color: var(--gates-white);
}

.embed-mode h1 {
    font-size: 1.5rem;
}

.embed-mode .page-description {
    font-size: 1rem;
}

/* ── Calculator form ─────────────────────────────────── */
.calc-form .form-label {
    margin-bottom: 0.35rem;
    font-size: 0.9rem;
    color: var(--gates-text);
}

.calc-form .form-select,
.calc-form .form-control {
    border-radius: 0;
    border: 1px solid var(--gates-gray-border);
}

.calc-form .form-select:disabled {
    background-color: var(--gates-gray-light);
    color: var(--gates-text-muted);
}

.calc-result-field {
    background-color: var(--gates-gray-light);
    border: 1px solid var(--gates-gray-border);
    border-radius: 0;
    color: var(--gates-text);
    min-height: calc(1.5em + 0.75rem + 2px);
    cursor: default;
}

.calc-results {
    border-top: 2px solid var(--gates-gray-border);
    padding-top: 1rem;
}

/* ── Utility — JS-toggled panels (show/hide via jQuery) ──── */
.js-hidden {
    display: none;
}

/* ── Select that shrinks to content width ────────────────── */
.form-select-auto {
    width: auto;
}

/* ── Small form text ───────────────────────────────────── */
.form-text-sm {
    font-size: 0.75rem;
}

/* ── Numeric inputs — hide native spinners ─────────────── */
input[type="number"].form-control {
    -moz-appearance: textfield;
}

input[type="number"].form-control::-webkit-outer-spin-button,
input[type="number"].form-control::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.chain-results-container {
    overflow: auto;
    max-height: 500px;
    font-size: 0.78rem;
}

.chain-results-table {
    min-width: 700px;
    white-space: nowrap;
}

.chain-results-thead {
    position: sticky;
    top: 0;
    z-index: 1;
    font-size: 0.74rem;
}

.chain-results-thead th.sortable {
    cursor: pointer;
    user-select: none;
}

.chain-results-thead th.sortable:hover {
    background-color: #495057;
}

.chain-results-thead .sort-icon {
    font-size: 0.65rem;
    margin-left: 2px;
    opacity: 0.8;
}

.chain-results-action-col {
    width: 40px;
}