/* ============================================================
   home.css — Home page styles for the Pancreas Atlas Shiny App
   ============================================================
   Loaded via tags$head(tags$link(...)) in app.R.
   Shiny automatically serves everything in the www/ folder at the
   app root URL, so href="home.css" resolves correctly.

   Sections:
     1. Fonts & Base
     2. Banner
     3. Stats Strip
     4. Home Content & Tab Sections
     5. Callouts
     6. App Cards
     7. Feature / Sidebar Cards
     8. Image Display
     9. Footer
    10. Responsive breakpoints
    11. Dark mode overrides
   ============================================================ */

/* ---- -1. Custom Topbar & Nav Button Group -------------------
   Replaces page_navbar() with a fixed-position custom header.
   Height is 54px — matches the top value used in the sticky
   sidebar rule below.
   ------------------------------------------------------------ */
.custom-topbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1030;
    height: 54px;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0 1.25rem;
    background: #9B7FD4;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.22);
}

.topbar-brand {
    font-size: 1rem;
    font-weight: 700;
    color: white;
    white-space: nowrap;
    flex-shrink: 0;
}

/* The pill-group container */
.nav-btn-group {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    padding: 4px;
    gap: 3px;
    flex: 1;
}

/* Individual pill button */
.nav-btn {
    padding: 0.3rem 1rem;
    border-radius: 7px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.75);
    transition: background 0.15s ease, color 0.15s ease;
    user-select: none;
    white-space: nowrap;
}

.nav-btn:hover {
    color: white;
    background: rgba(255, 255, 255, 0.15);
}

.nav-btn.nav-btn-active {
    background: white;
    color: #9B7FD4;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
}

/* Dark mode toggle pushed to the right */
.topbar-right {
    margin-left: auto;
    flex-shrink: 0;
}

/* Offset all page content below the fixed topbar */
.main-content {
    margin-top: 54px;
}

/* ---- 0. Fixed sidebar ----------------------------------------
   Applied to sub-app sidebars only (scRef, integratedSpatial, spatial).
   The .home-layout wrapper excludes the home page nav sidebar from
   these rules so its nav items remain visible and unstyled.
   ------------------------------------------------------------ */
.bslib-sidebar-layout > .sidebar {
    position: sticky;
    top: 54px;
    height: calc(100vh - 54px);
    overflow-y: auto;
    overflow-x: hidden;
}

/* Reset for the home page sidebar — let it size naturally */
.home-layout .bslib-sidebar-layout > .sidebar {
    position: static;
    height: auto;
    overflow: visible;
}

/* ---- Page navbar pill tabs ---------------------------------- */
.navbar-nav .nav-link {
    border-radius: 8px;
    padding: 0.35rem 0.9rem !important;
    margin: 0 2px;
    font-weight: 500;
    transition: background 0.18s ease, color 0.18s ease;
}

.navbar-nav .nav-link:not(.active):hover {
    background: rgba(155, 127, 212, 0.08);
    color: #9B7FD4 !important;
}

.navbar-nav .nav-link.active {
    background: rgba(155, 127, 212, 0.15) !important;
    color: #7a5cb8 !important;
    font-weight: 600;
    border-radius: 8px;
}

html[data-bs-theme="dark"] .navbar,
html[data-bs-theme="dark"] .navbar-expand-md,
html[data-bs-theme="dark"] nav.navbar {
    background-color: #343a40 !important;
    border-bottom: 1px solid #4a5056;
}

html[data-bs-theme="dark"] .navbar-nav .nav-link:not(.active):hover {
    background: rgba(155, 127, 212, 0.14);
    color: #c4aff0 !important;
}

html[data-bs-theme="dark"] .navbar-nav .nav-link.active {
    background: rgba(155, 127, 212, 0.25) !important;
    color: #c4aff0 !important;
}

/* ---- 1. Fonts & Base ---------------------------------------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

.home-banner,
.home-content,
.home-footer,
.stats-strip {
    font-family: 'Inter', sans-serif;
}

/* ---- 2. Banner ---------------------------------------------- */
/*
   Full-width gradient header rendered at the top of the Home tab.
   border-radius on the bottom corners gives it a "card" feel.
*/
.home-banner {
    background: linear-gradient(135deg, #9B7FD4 0%, #B49DE0 100%);
    color: white;
    text-align: center;
    padding: 52px 20px 44px;
    border-radius: 0 0 24px 24px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.22);
    margin-bottom: 0;
}

.home-banner h1 {
    font-size: 2rem;
    font-weight: 700;
    color: white !important;
    margin: 0;
    border-bottom: none !important;   /* override bslib h2 rule */
    padding-bottom: 0 !important;
}

.home-banner p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.05rem;
    margin-top: 0.6rem;
    margin-bottom: 0;
}

/* ---- 3. Stats Strip ----------------------------------------- */
/*
   Four stat cards displayed in a horizontal row below the banner.
   flex-wrap allows them to stack on small screens.
*/
.stats-strip {
    display: flex;
    justify-content: center;
    gap: 1.25rem;
    padding: 1.75rem 1rem 1.25rem;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    padding: 1.25rem 1.5rem;
    background: var(--bs-body-bg);
    border: 1px solid var(--bs-border-color-translucent);
    border-radius: 14px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    min-width: 120px;
    flex: 1;
    max-width: 170px;
}

.stat-number {
    font-size: 1.85rem;
    font-weight: 700;
    color: #9B7FD4;
    line-height: 1.2;
}

.stat-label {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--bs-secondary-color);
    margin-top: 0.35rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ---- 4. Home Sidebar Navigation ----------------------------- */
/*
   Styled nav items inside the fixed layout_sidebar() on the home page.
   Replaces the old navset_pill_list Bootstrap-grid approach with a
   truly fixed-width sidebar via layout_sidebar(width = 200).
*/
.home-nav-item {
    display: block;
    padding: 0.45rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--bs-body-color);
    transition: background 0.15s ease, color 0.15s ease;
    user-select: none;
    margin-bottom: 2px;
}

.home-nav-item:hover {
    background: rgba(var(--bs-primary-rgb), 0.08);
    color: var(--bs-primary);
}

.home-nav-item.home-active {
    background: var(--bs-primary);
    color: white;
}

/* ---- 4b. Home Content & Tab Sections ------------------------- */
/*
   .home-content wraps the navset_pill_list.
   max-width + auto margins keep it from stretching too wide on
   large monitors.
*/
.home-content {
    padding: 1.25rem 1.5rem 0;
    max-width: 1400px;
    margin: 0 auto;
}

/*
   .tab-section gives consistent padding inside every nav_panel.
   Applied to the div() wrapping each panel's content in app.R.
*/
.tab-section {
    padding: 1.25rem 1.5rem 1.5rem;
}

.tab-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #9B7FD4;
    border-bottom: 1px solid var(--bs-border-color);
    padding-bottom: 0.5rem;
    margin-top: 0.25rem;
    margin-bottom: 1.25rem;
}

.tab-section h4 {
    font-size: 1rem;
    font-weight: 600;
    color: #9B7FD4;
    margin-top: 1.75rem;
    margin-bottom: 0.6rem;
}

/* Pill-list nav items: tighten default spacing */
.nav-pills .nav-link {
    font-size: 0.9rem;
    padding: 0.45rem 1rem;
    border-radius: 0.5rem;
}

/* ---- 5. Callouts -------------------------------------------- */
/*
   Custom callout boxes (note / warning / important).
   These mimic Quarto callouts but are plain HTML divs in Shiny.
*/
.callout {
    border-left: 5px solid;
    border-radius: 8px;
    padding: 1rem 1.25rem;
    margin: 1rem 0;
    line-height: 1.65;
}

.callout p:last-child { margin-bottom: 0; }

.callout-note {
    border-color: #4472C4;
    background: rgba(68, 114, 196, 0.06);
}

.callout-warning {
    border-color: #E6A817;
    background: rgba(230, 168, 23, 0.07);
}

.callout-important {
    border-color: #C0392B;
    background: rgba(192, 57, 43, 0.05);
}

/* ---- 6. App Cards ------------------------------------------- */
/*
   Three-column card grid for the Applications tab.
   Each card is a clickable anchor that opens an external app.
*/
.app-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin: 1.25rem 0 0.5rem;
}

.app-card-link {
    text-decoration: none;
    color: inherit;
    display: flex;
    cursor: pointer;
}

.app-card-link:hover { text-decoration: none; }

.app-card {
    background: var(--bs-body-bg);
    border: 1px solid var(--bs-border-color-translucent);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.app-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
    border-color: #9B7FD4;
}

.app-card-image {
    position: relative;
    height: 195px;
    overflow: hidden;
    background: #e8edf7;
}

.app-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
    display: block;
}

.app-card:hover .app-card-image img { transform: scale(1.05); }

/* Badge overlaid on the card image (top-left corner) */
.app-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: rgba(26, 43, 87, 0.85);
    color: white;
    font-size: 0.67rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    backdrop-filter: blur(4px);
}

.app-card-body {
    padding: 1.4rem 1.5rem;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.app-card-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: #9B7FD4;
    margin: 0 0 0.6rem;
    line-height: 1.35;
}

.app-card-desc {
    font-size: 0.875rem;
    line-height: 1.65;
    color: var(--bs-secondary-color);
    flex: 1;
    margin-bottom: 1rem;
}

.app-launch-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: #9B7FD4;
    padding-top: 0.9rem;
    border-top: 1px solid var(--bs-border-color-translucent);
    margin-top: auto;
    transition: gap 0.2s ease;
}

.app-card:hover .app-launch-btn {
    gap: 0.65rem;
    color: #B49DE0;
}

/* ---- 7. Feature / Sidebar Cards ----------------------------- */
/*
   Five-column grid of small feature preview cards in the User Guide tab.
   Each card shows a screenshot + title + description.
*/
.sidebar-card-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 14px;
    margin: 1.25rem auto 1.5rem;
}

.sidebar-card {
    background: var(--bs-body-bg);
    border: 1px solid var(--bs-border-color-translucent);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    text-align: center;
}

.sidebar-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.1);
}

.sidebar-card img {
    width: 100%;
    height: 140px;
    object-fit: contain;
    background-color: var(--bs-tertiary-bg, #f8f9fa);
    padding: 10px;
    display: block;
}

.sidebar-caption {
    padding: 10px 12px 14px;
    border-top: 1px solid var(--bs-border-color-translucent);
}

.sidebar-caption h4 {
    margin: 4px 0;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--bs-body-color);
}

.sidebar-caption p {
    font-size: 0.78rem;
    margin: 0;
    color: var(--bs-secondary-color);
    line-height: 1.4;
}

/* ---- 8. Image Display --------------------------------------- */
.img-center {
    text-align: center;
    margin: 1.25rem auto;
}

.img-center img {
    max-width: 100%;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* ---- 9. DOI Badge ------------------------------------------ */
/*
   Inline pill used for Zenodo / DOI links.
   Uses Bootstrap Icons (bi-box-arrow-up-right) which are available
   because bslib loads Bootstrap Icons CSS automatically.
*/
.doi-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8rem;
    font-family: 'Fira Code', 'Courier New', monospace;
    background: #eef2fb;
    border: 1px solid #c5d0e8;
    border-radius: 5px;
    padding: 2px 9px;
    color: #9B7FD4;
    text-decoration: none;
    vertical-align: middle;
    transition: background 0.2s ease, color 0.2s ease;
}

.doi-badge:hover {
    background: #9B7FD4;
    color: white;
    text-decoration: none;
    border-color: #9B7FD4;
}

[data-bs-theme="dark"] .doi-badge {
    background: rgba(68, 114, 196, 0.15);
    border-color: rgba(68, 114, 196, 0.4);
    color: var(--bs-primary);
}

[data-bs-theme="dark"] .doi-badge:hover {
    background: var(--bs-primary);
    color: white;
    border-color: var(--bs-primary);
}

/* ---- 10. Footer -------------------------------------------- */
.home-footer {
    text-align: center;
    padding: 1.5rem;
    border-top: 1px solid var(--bs-border-color-translucent);
    color: var(--bs-secondary-color);
    font-size: 0.9rem;
    margin-top: 1.5rem;
}

/* ---- 10. Responsive breakpoints ---------------------------- */
@media (max-width: 860px) {
    .app-grid            { grid-template-columns: repeat(2, 1fr); }
    .sidebar-card-grid   { grid-template-columns: repeat(3, 1fr); }
    .stats-strip         { gap: 0.85rem; }
}

@media (max-width: 540px) {
    .app-grid            { grid-template-columns: 1fr; }
    .sidebar-card-grid   { grid-template-columns: repeat(2, 1fr); }
    .home-banner h1      { font-size: 1.5rem; }
}

/* ---- 11. Dark mode overrides ------------------------------- */
/*
   bslib sets data-bs-theme="dark" on <html> when dark mode is active.
   All color-sensitive rules are mirrored here.
*/
[data-bs-theme="dark"] .stat-number          { color: var(--bs-primary); }
[data-bs-theme="dark"] .stat-item            { box-shadow: none; }

[data-bs-theme="dark"] .app-card             { box-shadow: none; }
[data-bs-theme="dark"] .app-card:hover       { box-shadow: 0 0 14px rgba(255,255,255,0.06); border-color: var(--bs-gray-500); }
[data-bs-theme="dark"] .app-card-image       { background: var(--bs-gray-800); }
[data-bs-theme="dark"] .app-card-title       { color: var(--bs-primary); }
[data-bs-theme="dark"] .app-launch-btn       { color: var(--bs-primary); }
[data-bs-theme="dark"] .app-card:hover .app-launch-btn { color: var(--bs-primary); filter: brightness(1.2); }

[data-bs-theme="dark"] .sidebar-card         { box-shadow: none; }
[data-bs-theme="dark"] .sidebar-card img     { background-color: var(--bs-gray-800); }

[data-bs-theme="dark"] .tab-section h3       { color: var(--bs-primary); }

[data-bs-theme="dark"] .callout-note         { background: rgba(68, 114, 196, 0.14); }
[data-bs-theme="dark"] .callout-warning      { background: rgba(230, 168, 23, 0.12); }
[data-bs-theme="dark"] .callout-important    { background: rgba(192, 57, 43, 0.12); }