/* ------------------------------------------------------------------
   Theme: a soft, low-glare dark palette. Backgrounds are dark slate
   (never pure black), text is off-white (never pure white), and the
   single accent is a calm blue. Text/background pairs below all meet
   WCAG AA contrast (4.5:1) for body text.
   ------------------------------------------------------------------ */
:root {
    color-scheme: dark;

    --bg:            #1b1f26;   /* page / scrolling form area */
    --surface:       #232830;   /* panels, sidebar, form sections */
    --surface-2:     #2b313b;   /* raised: buttons, result rows */
    --surface-3:     #353d49;   /* hover */
    --header:        #171a20;   /* navbar, footer, form header */
    --input:         #1a1e25;   /* text inputs */

    --border:        #343b47;
    --border-strong: #485163;

    --text:          #e4e8ee;   /* primary text */
    --text-label:    #cbd2dd;   /* field labels */
    --text-muted:    #a6afbd;   /* secondary text */

    --accent:        #7db4f0;   /* links, focus, selection */
    --accent-soft:   rgba(125, 180, 240, 0.14);
    --accent-btn:    #2f6aa3;   /* filled buttons (white text, 5.5:1) */
    --accent-btn-hover: #3876b3;

    --ok:            #8fd19e;
    --error:         #f4a3a3;

    --radius:        8px;
    --shadow:        0 1px 2px rgba(0, 0, 0, 0.35), 0 4px 14px rgba(0, 0, 0, 0.25);

    --border-hover:  #5a6579;
    --placeholder:   #8c96a5;
    --focus-ring:    rgba(125, 180, 240, 0.25);
    --selection:     rgba(125, 180, 240, 0.35);
    --scrollbar:     #4a5364;
    --overlay:       rgba(20, 24, 31, 0.72);   /* over the home/login photo */
    --title-shadow:  0 2px 18px rgba(0, 0, 0, 0.6);

    --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto,
            "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

/* ------------------------------------------------------------------
   Light theme: the same variables, re-pointed. It is switched on by
   data-theme="light" on <html> (see the Settings page); dark is the
   default. Text/background pairs meet WCAG AA here too.
   ------------------------------------------------------------------ */
:root[data-theme="light"] {
    color-scheme: light;

    --bg:            #f1f4f8;
    --surface:       #ffffff;
    --surface-2:     #eaeef3;
    --surface-3:     #dde3ea;
    --header:        #ffffff;
    --input:         #ffffff;

    --border:        #d3dae3;
    --border-strong: #aeb9c7;

    --text:          #1f2933;
    --text-label:    #3b4856;
    --text-muted:    #556272;

    --accent:        #1d6bb8;
    --accent-soft:   rgba(29, 107, 184, 0.12);
    --accent-btn:    #2f6aa3;
    --accent-btn-hover: #255a8e;

    --ok:            #1c7434;
    --error:         #b3261e;

    --shadow:        0 1px 2px rgba(31, 41, 51, 0.08), 0 4px 14px rgba(31, 41, 51, 0.08);

    --border-hover:  #8b99ab;
    --placeholder:   #66717f;
    --focus-ring:    rgba(29, 107, 184, 0.25);
    --selection:     rgba(29, 107, 184, 0.25);
    --scrollbar:     #aeb9c7;
    --overlay:       rgba(241, 244, 248, 0.80);
    --title-shadow:  0 2px 18px rgba(255, 255, 255, 0.7);
}

/* Universal reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body, #root, #app {
    height: 100%;
    width: 100%;
}

body {
    font-family: var(--font);
    font-size: 15px;
    line-height: 1.5;
    color: var(--text);
    background-color: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: 1.25;
    color: var(--text);
}

a {
    color: var(--accent);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

::selection {
    background: var(--selection);
}

/* ------------------------------------------------------------------
   Form controls
   ------------------------------------------------------------------ */
input, select, textarea, button {
    font: inherit;
    color: var(--text);
}

input[type="text"],
input[type="password"],
input[type="search"],
select,
textarea {
    background-color: var(--input);
    border: 1px solid var(--border-strong);
    border-radius: 6px;
    line-height: 1.4;
    transition: border-color 0.15s, box-shadow 0.15s;
}

textarea {
    resize: vertical;
}

input::placeholder,
textarea::placeholder {
    color: var(--placeholder);
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--focus-ring);
}

/* Read-only view: still legible, visibly not editable */
input[readonly],
textarea[readonly],
select:disabled {
    background-color: var(--surface);
    border-color: var(--border);
    color: var(--text);
    opacity: 1;
    cursor: default;
}

button {
    background-color: var(--surface-2);
    border: 1px solid var(--border-strong);
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.15s, border-color 0.15s, box-shadow 0.15s;
}
button:hover {
    background-color: var(--surface-3);
    border-color: var(--border-hover);
}
button:active {
    background-color: var(--surface);
}
.btn-primary {
    background-color: var(--accent-btn);
    border-color: transparent;
    color: #fff;
}
.btn-primary:hover {
    background-color: var(--accent-btn-hover);
    border-color: transparent;
    text-decoration: none;
}
button:focus-visible,
a:focus-visible,
[role="button"]:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* ------------------------------------------------------------------
   Navbar and footer
   ------------------------------------------------------------------ */
.main-container {
    background-color: var(--bg);
    color: var(--text);
    height: 100vh;
    overflow: hidden;
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: auto minmax(0, 1fr) auto;
}
.view-container {
    height: 100%;
    min-height: 0;
    overflow: hidden;
}

.navbar {
    display: flex;
    position: relative;
    padding: 15px;
    gap: 20px;
    align-items: center;
    background-color: var(--header) !important;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    z-index: 2;
}
.navbar a,
.navbar button {
    background-color: transparent;
    border: 1px solid transparent;
    border-radius: 6px;
    color: var(--text);
    font-size: 14px;
    font-weight: 500;
    padding: 8px 14px;
    text-decoration: none;
}
.navbar a:hover,
.navbar button:hover {
    background-color: var(--surface-2);
    border-color: var(--border);
    text-decoration: none;
}
.navbar .nav-link {
    display: inline-block;
    padding: 10px 20px;
    text-decoration: none;
    text-align: center;
}
.nav-link--end {
    margin-left: auto;  /* last child: pushed to the far right */
}
.navbar-title {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    margin: 0;
    color: var(--text);
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 0.04em;
    white-space: nowrap;
    pointer-events: none;
}

.footer {
    background-color: var(--header) !important;
    border-top: 1px solid var(--border);
    color: var(--text-muted) !important;
    font-size: 12px;
    padding: 6px 15px;
    text-align: center;
    width: 100%;
}

/* ------------------------------------------------------------------
   Form layout pieces
   ------------------------------------------------------------------ */
.aside {
    background-color: var(--surface) !important;
    border-right: 1px solid var(--border);
}
.aside button {
    width: 100%;
    text-align: left;
    cursor: pointer;
    font-weight: 400;
    background-color: transparent;
    border: none;
    border-left: 3px solid transparent;
    border-radius: 6px;
    color: var(--text-label);
    font-size: 14px;
    padding: 8px 12px;
}
.aside button:hover {
    background-color: var(--surface-2);
    color: var(--text);
}
.aside button.is-selected {
    background-color: var(--accent-soft);
    border-left-color: var(--accent);
    color: var(--text);
    font-weight: 600;
}

.form-header {
    background-color: var(--surface) !important;
    border-bottom: 1px solid var(--border) !important;
    box-shadow: var(--shadow);
    z-index: 1;
}

fieldset {
    background-color: var(--surface);
    border-radius: var(--radius);
}
legend {
    font-size: 14px;
    letter-spacing: 0.01em;
}

/* Explorer results */
.result-row {
    display: block;
    padding: 14px 18px;
    border: 1px solid var(--border);
    color: var(--text);
    text-decoration: none;
    text-align: left;
    cursor: pointer;
    background-color: var(--surface);
    border-radius: var(--radius);
    transition: background-color 0.15s, border-color 0.15s;
}
.result-row:hover {
    background-color: var(--surface-2);
    border-color: var(--border-strong) !important;
    text-decoration: none;
}

pre {
    font-family: var(--font-mono);
    line-height: 1.5;
}

/* Thin, unobtrusive scrollbars */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--scrollbar) transparent;
}

/* Legacy example styles */
.example-clock {
    font-size: 128px;
    line-height: 1.2em;
    font-family: HelveticaNeue-UltraLight, Helvetica;
}

@media (max-width: 768px) {
    .example-clock {
        font-size: 64px;
    }
}

.color-input, .color-input input {
    font-size: 24px;
    line-height: 1.5em;
}

/* ------------------------------------------------------------------
   Page layout shared by the ingest and explorer pages
   ------------------------------------------------------------------ */
.page-grid {
    width: 100%;
    height: 100%;
    min-height: 0;
    overflow: hidden;
    background-color: var(--bg);
    color: var(--text);
    display: grid;
    grid-template-columns: 312px minmax(0, 1fr);
}
.form-main {
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
    min-height: 0;
    overflow: hidden;
    color: var(--text);
}
.form-header--grid {
    box-sizing: border-box;
    padding: 12px 20px;
    max-height: 40vh;
    overflow-y: auto;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 12px 24px;
}
.form-header--row {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 12px 24px;
    padding: 12px 20px;
}
.form-header-controls {
    justify-self: end;
}
.form-title {
    margin: 0;
    color: var(--text);
    font-size: 20px;
}
.form-title--centered {
    text-align: center;
}
.back-link {
    font-size: 14px;
}
.form-scroll {
    min-height: 0;
    overflow-y: auto;
}
.form-scroll--centered {
    display: grid;
    justify-items: center;
    align-content: start;
}
.form-scroll--padded {
    padding: 0 20px;
}
.finding-aid-body {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Sidebar */
.section-nav {
    display: flex;
    flex-direction: column;
    color: var(--text);
    align-items: center;
    padding: 14px 12px;
    gap: 4px;
    overflow-y: auto;
    overflow-x: hidden;
    min-width: 0;
}
/* Series / box tree in the section sidebar */
.tree,
.tree-row {
    width: 100%;
    min-width: 0;
}
.tree-row {
    display: flex;
    align-items: stretch;
}
.aside .tree-label {
    flex: 1 1 auto;
    min-width: 0;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}
.aside .tree-caret {
    flex: none;
    width: 26px;
    padding: 8px 0;
    text-align: center;
    border-left: none;
}
.tree-caret-spacer {
    flex: none;
    width: 26px;
}
.tree-children {
    margin-left: 13px;
    padding-left: 4px;
    border-left: 1px solid var(--border-strong);
}
.section-nav-title {
    color: var(--text);
    width: 100%;
    font-size: 17px;
    text-align: center;
    padding: 4px 5px 12px;
    margin-bottom: 10px;
    border-bottom: 1px solid var(--border);
}

/* ------------------------------------------------------------------
   The entry form
   ------------------------------------------------------------------ */
.entry-form {
    width: min(900px, 90%);
    padding: 20px 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}
.form-label {
    color: var(--text-label);
    display: flex;
    flex-direction: column;
    gap: 5px;
    flex: 1;
    font-size: 13px;
    font-weight: 500;
    text-align: left;
}
.form-input {
    padding: 8px 10px;
    width: 100%;
    box-sizing: border-box;
    font-family: inherit;
}
.form-row {
    display: flex;
    gap: 10px;
    width: 100%;
}
.form-section {
    border: 1px solid var(--border);
    padding: 10px 15px 15px;
    margin: 0 0 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 100%;
    box-sizing: border-box;
}
.form-section--collapsed {
    padding: 0 15px;
}
.form-section-title {
    padding: 0 8px;
    font-weight: bold;
    color: var(--text);
    cursor: pointer;
    user-select: none;
}
.form-hint {
    color: var(--text);
}
.form-subheading {
    color: var(--text);
}
.digital-objects {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 6px;
}
.digital-objects > .form-subheading {
    cursor: pointer;
    user-select: none;
}
.digital-object-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.access-points {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.box-entry {
    border: 1px solid var(--border);
    border-radius: 6px;
    background-color: var(--bg);
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.box-entry-header {
    display: flex;
    justify-content: space-between;
}
.box-entry-title {
    color: var(--text);
    cursor: pointer;
    user-select: none;
}
.entry-remove-button {
    padding: 6px 14px;
    font-size: 13px;
    white-space: nowrap;
}
.small-button {
    align-self: flex-start;
    padding: 4px 10px;
    cursor: pointer;
    font-size: 13px;
}
.remove-button {
    align-self: flex-end;
    padding: 8px;
}
.entity-preview {
    text-align: left;
    white-space: pre-wrap;
    font-size: 13px;
    color: var(--text);
}

/* Form action buttons and save feedback */
.form-controls {
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: flex-end;
}
.form-controls-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}
.control-button {
    padding: 9px 16px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
}
.save-status {
    width: 100%;
    text-align: left;
}
.save-status--ok {
    color: var(--ok);
}
.save-status--error {
    color: var(--error);
}

/* File upload (ingest page) */
.upload-text,
.file-list {
    color: var(--text);
}
.drop-zone {
    border: 2px dashed var(--border-strong);
    margin-top: 15px;
    margin-bottom: 15px;
    padding: 40px;
    text-align: center;
    width: 25vw;
    border-radius: 10px;
    color: var(--text-muted);
    background-color: var(--surface);
    transition: background-color 0.2s, border-color 0.2s;
    cursor: pointer;
}
.drop-zone.is-dragging {
    border-color: var(--accent);
    background-color: var(--accent-soft);
}
.drop-zone-text {
    pointer-events: none;
}

/* ------------------------------------------------------------------
   Explorer
   ------------------------------------------------------------------ */
.explorer-page {
    background-color: var(--bg);
    color: var(--text);
    height: 100%;
    max-height: 100vh;
    overflow-y: auto;
    box-sizing: border-box;
}
.explorer-content {
    width: min(900px, 90%);
    margin: 0 auto;
    padding: 20px 0;
}
.explorer-title {
    color: var(--text);
    font-size: 26px;
    margin-bottom: 16px;
}
.explorer-search {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}
.search-input {
    padding: 9px 12px;
    box-sizing: border-box;
    width: 100%;
}
.search-button {
    padding: 0 22px;
    font-weight: 500;
}
.result-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.result-count {
    color: var(--text-muted);
    text-align: left;
}
.result-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--text);
}
.result-meta {
    font-size: 14px;
    color: var(--text-label);
    margin-top: 4px;
}
.result-id {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 3px;
}
.error-text {
    color: var(--error);
}
.loading-text {
    color: var(--text);
}

/* ------------------------------------------------------------------
   Home and login: full-bleed photo under a dark overlay
   ------------------------------------------------------------------ */
.landing {
    background-image: linear-gradient(var(--overlay), var(--overlay)),
                      url("../images/253342.jpg");
    background-size: cover;
    background-position: center;
    width: 100%;
    height: 100%;
    display: grid;
    grid-template-columns: 1fr;
    justify-items: center;
}
.landing-panel {
    display: grid;
    width: 60%;
    height: 80%;
    margin-top: 5vh;
    margin-bottom: 5vh;
    padding-top: 10vh;
    padding-bottom: 10vh;
    grid-template-columns: 1fr;
    align-items: center;
    justify-items: center;
}
.landing-panel--home {
    grid-template-rows: auto auto;
}
.landing-panel--login {
    grid-template-rows: auto auto auto auto;
}
.landing-title {
    color: var(--text);
    font-size: clamp(48px, 7vw, 120px);
    font-weight: 300;
    letter-spacing: 0.02em;
    text-shadow: var(--title-shadow);
    text-align: center;
}
.splash-actions {
    display: flex;
    gap: 2vw;
    justify-content: center;
}
.splash-greeting {
    color: var(--text);
    font-size: clamp(28px, 3.5vw, 60px);
    font-weight: 300;
    text-align: center;
    margin: 0 0 24px;
}
.home-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    background-color: var(--accent-btn);
    color: #fff;
    text-decoration: none;
    border-radius: 6px;
    text-align: center;
    font-size: 16px;
    font-weight: 500;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
    transition: background-color 0.15s;
    height: 44px;
    min-width: 140px;
    width: 10vw;
}
.home-btn:hover {
    background-color: var(--accent-btn-hover);
    text-decoration: none;
}
.login-input {
    height: 44px;
    min-width: 260px;
    width: 15vw;
    padding-left: 12px;
}
.login-input--username {
    margin-top: 5vh;
}
.login-input--password {
    margin-top: 10px;
}
.login-button {
    height: 44px;
    margin-top: 10px;
    font-weight: 500;
    min-width: 120px;
    width: 8vw;
}
.login-message {
    color: var(--text);
    font-size: 18px;
    font-weight: 500;
}

/* ------------------------------------------------------------------
   Layout mock-up page (/grid), development only
   ------------------------------------------------------------------ */
.grid-demo {
    display: grid;
    background-color: #333840;
    color: white;
    height: 100vh;
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr auto;
}
.grid-demo-nav {
    color: white;
    display: flex;
    background-color: #33CC12;
    padding: 15px;
    gap: 20px;
}
.grid-demo-center {
    display: grid;
    grid-template-columns: auto 1fr;
}
.grid-demo-aside {
    display: flex;
    flex-direction: column;
    color: white;
    background-color: #0000CC;
    align-content: center;
    padding: 30px;
    gap: 30px;
}
.grid-demo-main {
    display: grid;
    color: white;
    justify-items: center;
    align-items: center;
}
.grid-demo-main h2 {
    color: white;
}
.grid-demo-footer {
    color: white;
}

/* ------------------------------------------------------------------
   Toggle switch (Settings)
   ------------------------------------------------------------------ */
.setting-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    width: 100%;
}
.setting-name {
    color: var(--text);
    font-weight: 500;
}
.setting-description {
    color: var(--text-muted);
    font-size: 13px;
}
.toggle {
    position: relative;
    flex: none;
    width: 46px;
    height: 26px;
    padding: 0;
    border-radius: 13px;
    background-color: var(--surface-3);
    border: 1px solid var(--border-strong);
}
.toggle:hover {
    background-color: var(--surface-3);
    border-color: var(--border-hover);
}
.toggle::after {
    content: "";
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: var(--text-muted);
    transition: transform 0.15s, background-color 0.15s;
}
.toggle[aria-checked="true"] {
    background-color: var(--accent-btn);
    border-color: transparent;
}
.toggle[aria-checked="true"]::after {
    transform: translateX(20px);
    background-color: #fff;
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}
.settings-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    margin-top: 20px;
}
.settings-actions .save-status {
    width: auto;
}