/*
 * Copyright (c) 2026 Guy's and St Thomas' NHS Foundation Trust & King's College London
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *     http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/* ──────────────────────────────────────────────────────────────────────
 *  FLIP × Read the Docs — drop-in stylesheet
 *  Replaces docs/source/_static/style.css
 *
 *  Aligns the sphinx-rtd-theme rendering of FLIP's docs with the
 *  FLIP Design System (purple primary #61366E, signature gradient,
 *  Bai Jamjuree headings, Montserrat body, JetBrains Mono code).
 *
 *  Drop this file at docs/source/_static/style.css and keep the existing
 *  layout.html that links it via {% block extrahead %}.
 * ──────────────────────────────────────────────────────────────────────*/

/* Webfonts ─ these are the same files shipping in the flip-ui webapp.
 * The companion layout.html copies them into _static/fonts/. */
@font-face {
    font-family: 'Bai Jamjuree';
    font-weight: 500;
    src: url('fonts/BaiJamjuree-Medium.ttf') format('truetype');
    font-display: swap;
}
@font-face {
    font-family: 'Bai Jamjuree';
    font-weight: 600;
    src: url('fonts/BaiJamjuree-SemiBold.ttf') format('truetype');
    font-display: swap;
}
@font-face {
    font-family: 'Bai Jamjuree';
    font-weight: 700;
    src: url('fonts/BaiJamjuree-Bold.ttf') format('truetype');
    font-display: swap;
}
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700&family=JetBrains+Mono:wght@400;600&display=swap');

:root {
    /* Brand */
    --flip-primary:       #61366E;   /* product primary */
    --flip-primary-400:   #9452A8;
    --flip-primary-300:   #B88AC6;
    --flip-primary-200:   #DBC4E2;
    --flip-primary-100:   #F7F3F9;
    --flip-deep-purple:   #5C2D82;
    --flip-plum:          #872B6E;
    --flip-magenta:       #C41E6A;
    --flip-hot-pink:      #E91E63;
    --flip-navy:          #2C3E6B;
    --flip-charcoal:      #333333;

    --flip-gradient-bar: linear-gradient(
        90deg,
        var(--flip-deep-purple) 0%,
        var(--flip-plum) 35%,
        var(--flip-magenta) 65%,
        var(--flip-hot-pink) 100%
    );

    /* Neutrals (match flip-ui Tailwind gray scale) */
    --gray-50:  #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;

    --font-heading: "Bai Jamjuree", system-ui, sans-serif;
    --font-body:    "Montserrat", system-ui, sans-serif;
    --font-mono:    "JetBrains Mono", ui-monospace, monospace;
}

/* ── Body & typography ─────────────────────────────────────────────────*/
body, .wy-body-for-nav,
.rst-content, .rst-content p, .rst-content li,
.wy-nav-content {
    font-family: var(--font-body) !important;
    color: var(--gray-700);
}
.rst-content p {
    font-size: 15.5px;
    line-height: 1.65;
    margin-bottom: 1em;
}
.rst-content h1, .rst-content h2, .rst-content h3,
.rst-content h4, .rst-content h5, .rst-content h6 {
    font-family: var(--font-heading) !important;
    color: var(--gray-900);
    letter-spacing: -0.005em;
}
.rst-content h1 {
    font-size: 32px;
    font-weight: 700;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--gray-200);
    margin-bottom: 24px;
    position: relative;
}
.rst-content h1::after {
    /* signature gradient accent under H1 */
    content: "";
    position: absolute;
    left: 0;
    bottom: -1px;
    width: 96px;
    height: 3px;
    border-radius: 2px;
    background: var(--flip-gradient-bar);
}
.rst-content h2 { font-size: 22px; font-weight: 600; margin-top: 36px; }
.rst-content h3 { font-size: 18px; font-weight: 600; margin-top: 28px; color: var(--flip-primary); }
.rst-content h4 { font-size: 16px; font-weight: 600; }

/* ── Sidebar ───────────────────────────────────────────────────────────*/
.wy-nav-side {
    background: #1A1320;            /* near-black w/ purple cast */
}
.wy-side-nav-search,
.wy-nav-top {
    background: var(--flip-primary-100) !important;
    border-bottom: 3px solid transparent;
    border-image: var(--flip-gradient-bar) 1;
    position: relative;
}
.wy-side-nav-search {
    padding: 18px 16px 14px;
}
.wy-side-nav-search input[type="text"] {
    border-radius: 6px;
    border: 1px solid var(--flip-primary-400);
    background: rgba(255,255,255,0.08);
    color: var(--flip-primary-400);
    font-family: var(--font-body);
    font-size: 13.5px;
    padding: 8px 12px;
    box-shadow: none;
    transition: border-color 150ms ease, background 150ms ease;
}
.wy-side-nav-search input[type="text"]::placeholder { color:var(--flip-primary-400); }
.wy-side-nav-search input[type="text"]:focus {
    border-color:var(--flip-primary-400);
    background: rgba(255,255,255,0.14);
    outline: none;
}
.wy-side-nav-search > a {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 22px;
    letter-spacing: -0.01em;
    color: #fff !important;
}
.wy-side-nav-search > a img.logo {
    max-width: 140px;
    margin-bottom: 6px;
}
/* Default any interactive element in the search area to readable purple
   so future additions (e.g. a language picker) don't fail contrast. The
   !important is required to win against RTD's built-in white-text rule for
   the version selector when it renders the <select> outside div.version. */
.wy-side-nav-search select,
.wy-side-nav-search button {
    color: var(--flip-primary-400) !important;
}
.wy-side-nav-search > div.version,
.wy-side-nav-search .wy-dropdown > a,
.wy-side-nav-search > div.version a,
.wy-side-nav-search > div.version select {
    color: var(--flip-primary-400) !important;
    font-family: var(--font-mono);
    font-size: 11.5px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

/* Sidebar nav links */
.wy-menu-vertical a:link,
.wy-menu-vertical a:visited,
.wy-menu-vertical li.toctree-l2 a,
.wy-menu-vertical li.toctree-l3 a,
.wy-menu-vertical li.toctree-l4 a,
.wy-menu-vertical li.toctree-l5 a,
.wy-menu-vertical li.toctree-l6 a,
.wy-menu-vertical li.toctree-l7 a,
.wy-menu-vertical li.toctree-l8 a,
.wy-menu-vertical li.toctree-l9 a,
.wy-menu-vertical li.toctree-l10 a {
    color: #E2DCE8;
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 500;
    transition: background 150ms ease, color 150ms ease;
}
.wy-menu-vertical a:hover {
    background: rgba(97, 54, 110, 0.45);
    color: #fff;
}
.wy-menu-vertical li.current {
    background: transparent;
}
.wy-menu-vertical li.current > a,
.wy-menu-vertical li.toctree-l1.current > a {
    background: rgba(97, 54, 110, 0.55);
    color: #fff;
    border: none;
    border-left: 3px solid var(--flip-magenta);
    padding-left: calc(1.618em - 3px);
    font-weight: 600;
}
.wy-menu-vertical li.toctree-l2.current > a,
.wy-menu-vertical li.toctree-l3.current > a,
.wy-menu-vertical li.toctree-l4.current > a {
    background: rgba(97, 54, 110, 0.35);
    color: #fff;
}
.wy-menu-vertical li.toctree-l2 a,
.wy-menu-vertical li.toctree-l3 a,
.wy-menu-vertical li.toctree-l4 a {
    background: transparent;
}
/* Descendants of a current section: theme greys them out; restore brand palette */
.wy-menu-vertical li.toctree-l2.current li.toctree-l3 > a,
.wy-menu-vertical li.toctree-l3.current li.toctree-l4 > a,
.wy-menu-vertical li.toctree-l4.current li.toctree-l5 > a,
.wy-menu-vertical li.toctree-l5.current li.toctree-l6 > a {
    background: transparent;
    color: #E2DCE8;
}
.wy-menu-vertical p.caption {
    color: var(--flip-primary-300);
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-top: 18px;
}

/* ── Content area ──────────────────────────────────────────────────────*/
.wy-nav-content-wrap { background: #FAFAFB; }
.wy-nav-content {
    background: #FFFFFF;
    max-width: 1040px !important;
    padding: 36px 48px;
}

/* ── Links ─────────────────────────────────────────────────────────────*/
a:link, a:visited {
    color: var(--flip-primary);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: color 150ms ease, border-color 150ms ease;
}
a:hover {
    color: var(--flip-magenta);
    border-bottom-color: var(--flip-magenta);
}
.wy-side-nav-search a:link,
.wy-side-nav-search a:visited,
.wy-nav-top a:link,
.wy-nav-top a:visited,
.wy-menu-vertical a:link,
.wy-menu-vertical a:visited {
    border-bottom: none;
}

/* ── Code & inline literals ────────────────────────────────────────────*/
.rst-content code, .rst-content tt,
.rst-content code.literal, .rst-content tt.literal {
    background: var(--flip-primary-100);
    color: var(--flip-primary);
    border: 1px solid #EADDF0;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.88em;
    padding: 1px 6px;
}
.rst-content pre,
.highlight {
    background: var(--flip-primary-100);
    color: var(--gray-900);
    border: 1px solid #EADDF0;
    border-radius: 8px;
}
.rst-content pre {
    padding: 14px 16px;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.55;
    margin: 0 0 24px;
    overflow-x: auto;
}
.highlight {
    overflow: hidden;
    margin-bottom: 24px;
}
.highlight pre {
    background: transparent;
    border: none;
    border-radius: 0;
    margin: 0;
}

/* ── Admonitions (notes, warnings, tips) ───────────────────────────────*/
.rst-content .admonition,
.rst-content .note,
.rst-content .warning,
.rst-content .tip,
.rst-content .important {
    border-radius: 8px;
    border: 1px solid var(--gray-200);
    background: #FFFFFF;
    box-shadow: 0 1px 2px rgba(0,0,0,0.04);
    padding: 0;
    overflow: hidden;
}
.rst-content .admonition .admonition-title,
.rst-content .note .admonition-title,
.rst-content .warning .admonition-title,
.rst-content .tip .admonition-title {
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 12px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 10px 16px;
    margin: 0;
}
.rst-content .admonition > *:not(.admonition-title),
.rst-content .note > *:not(.admonition-title),
.rst-content .warning > *:not(.admonition-title),
.rst-content .tip > *:not(.admonition-title) {
    padding-left: 16px;
    padding-right: 16px;
}
.rst-content .admonition > p:last-child,
.rst-content .note > p:last-child,
.rst-content .warning > p:last-child,
.rst-content .tip > p:last-child {
    padding-bottom: 14px;
}

/* Note → primary purple */
.rst-content .note .admonition-title,
.rst-content .admonition.note .admonition-title {
    background: var(--flip-primary-100);
    color: var(--flip-primary);
    border-bottom: 1px solid #EADDF0;
}
/* Warning → magenta accent */
.rst-content .warning .admonition-title {
    background: #FCE7EF;
    color: #9E1A4F;
    border-bottom: 1px solid #F5C9D8;
}
/* Tip → teal */
.rst-content .tip .admonition-title {
    background: #E0F5F0;
    color: #0F6E56;
    border-bottom: 1px solid #B5E2D5;
}

/* ── Tables ────────────────────────────────────────────────────────────*/
.wy-table-responsive { margin-bottom: 24px; max-width: 100%; overflow: visible; }
.wy-table-responsive table { border: 1px solid var(--gray-200); border-radius: 8px; border-collapse: separate; border-spacing: 0; overflow: hidden; }
.wy-table-responsive table td,
.wy-table-responsive table th { white-space: normal; border-bottom: 1px solid var(--gray-200); }
.wy-table-responsive table tr:last-child td { border-bottom: none; }
.rst-content table.docutils thead {
    background: var(--flip-primary-100);
}
.rst-content table.docutils thead th {
    color: var(--flip-primary);
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 12.5px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    border: none;
}
.rst-content table.docutils tbody tr:nth-child(odd) { background: var(--gray-50); }
.rst-content table.docutils tbody tr:nth-child(even) { background: #fff; }
.rst-content table.docutils td { font-size: 14px; }

/* ── Buttons / next-prev nav ───────────────────────────────────────────*/
.rst-content .btn,
.btn-neutral {
    background: #fff !important;
    color: var(--flip-primary) !important;
    border: 1px solid var(--gray-300) !important;
    box-shadow: none !important;
    border-radius: 6px !important;
    font-family: var(--font-body);
    font-weight: 600;
    text-shadow: none !important;
    transition: background 150ms ease, border-color 150ms ease;
}
.rst-content .btn:hover, .btn-neutral:hover {
    background: var(--flip-primary-100) !important;
    border-color: var(--flip-primary-300) !important;
    color: var(--flip-primary) !important;
}

/* ── Footer ────────────────────────────────────────────────────────────*/
footer {
    color: var(--gray-500);
    font-size: 12.5px;
    border-top: 1px solid var(--gray-200);
    margin-top: 48px;
    padding-top: 16px;
    position: relative;
}
footer::before {
    /* echoes the gradient accent at top */
    content: "";
    position: absolute;
    top: -1px;
    left: 0;
    width: 80px;
    height: 2px;
    background: var(--flip-gradient-bar);
    border-radius: 1px;
}
footer hr { display: none; }

/* ── Definition lists (autoapi) ────────────────────────────────────────*/
.rst-content dl:not(.docutils) dt,
.rst-content dl dt {
    background: var(--flip-primary-100);
    color: var(--flip-primary);
    border-top: 3px solid var(--flip-primary);
    border-left: none;
    font-family: var(--font-mono);
    border-radius: 0 6px 0 0;
}

/* ── Page-level layout polish ──────────────────────────────────────────*/
.rst-content .figure,
.rst-content figure {
    text-align: center;
    margin: 28px auto;
}
.rst-content .figure img,
.rst-content figure img {
    border-radius: 6px;
    border: 1px solid var(--gray-200);
    background: #fff;
    padding: 8px;
}
.rst-content .figure .caption,
.rst-content figcaption {
    font-size: 13px;
    color: var(--gray-500);
    margin-top: 8px;
    font-style: normal;
}

/* ── Scrollbar hint in dark sidebar ────────────────────────────────────*/
.wy-menu-vertical { scrollbar-color: rgba(255,255,255,0.2) transparent; }