/* ------------------------------------------------------------------
   Latent -- Darkroom contact sheet UI.
   Warm amber darkroom palette. Film strip aesthetic.
   ------------------------------------------------------------------ */

:root {
    --amber:           #C8A55A;
    --amber-dim:       #9B7E3A;
    --amber-glow:      #D4B06A;
    --safelight:       #7A3530;
    --safelight-dim:   #5C2824;

    --surface-000:     #0E0E0E;
    --surface-100:     #161616;
    --surface-200:     #1E1E1E;
    --surface-300:     #2A2A2A;
    --surface-400:     #3A3A3A;

    --text-primary:    #D8D3CB;
    --text-secondary:  #8A8580;
    --text-dim:        #5A5550;

    --film-border:     #C8A55A;
    --film-rebate:     #1A1400;

    --font-mono:       'JetBrains Mono', 'Fira Code', 'Courier New', monospace;

    --radius-small:    2px;
    --radius-medium:   6px;
    --transition:      150ms ease;
}

/* ---- Reset ---- */

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

/* ---- Base ---- */

body {
    background-color: var(--surface-000);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 400;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ---- Layout ---- */

.layout {
    display: flex;
    min-height: 100vh;
}

/* ---- Sidebar (left) ---- */

.sidebar {
    width: 280px;
    min-width: 280px;
    background-color: var(--surface-100);
    border-right: 1px solid var(--surface-300);
    padding: 28px 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    overflow-y: auto;
    max-height: 100vh;
    position: sticky;
    top: 0;
}

.sidebar__header {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.sidebar__header h1 {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--amber);
    line-height: 1;
}

.sidebar__subtitle {
    font-size: 10px;
    font-weight: 300;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-dim);
    line-height: 1;
}

.sidebar__section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar__label {
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-secondary);
    padding-bottom: 4px;
    border-bottom: 1px solid var(--surface-300);
}

.sidebar__list {
    display: flex;
    flex-direction: column;
    gap: 1px;
    max-height: 40vh;
    overflow-y: auto;
}

.simulation-item {
    cursor: pointer;
    padding: 7px 10px;
    min-height: 32px;
    display: flex;
    align-items: center;
    font-size: 11px;
    color: var(--text-secondary);
    transition: color var(--transition), background-color var(--transition),
                box-shadow var(--transition);
    border-radius: var(--radius-small);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    box-shadow: inset 0 -1px 0 var(--surface-300);
}

.simulation-item:hover {
    color: var(--text-primary);
    background-color: var(--surface-200);
    box-shadow: inset 3px 0 0 var(--amber-dim);
}

.simulation-item--active {
    color: var(--amber);
    background-color: var(--surface-200);
    box-shadow: inset 3px 0 0 var(--amber);
}

/* ---- Simulation details / Film card ---- */

.sidebar__details {
    background-color: var(--surface-200);
    border-radius: var(--radius-medium);
    min-height: 60px;
    max-height: 40vh;
    overflow-y: auto;
}

.sidebar__details h3 {
    font-size: 12px;
    font-weight: 500;
    color: var(--amber);
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 6px;
}

.sidebar__details p {
    font-size: 11px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.sidebar__details--empty {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.sidebar__details--empty p {
    font-size: 11px;
    color: var(--text-dim);
    font-style: italic;
}

/* ---- Film card (Apple-esque info panel) ---- */

.film-card {
    display: flex;
    flex-direction: column;
}

.film-card__header {
    padding: 14px 16px 10px 16px;
    border-bottom: 1px solid var(--surface-300);
}

.film-card__name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

.film-card__meta {
    padding: 10px 16px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    border-bottom: 1px solid var(--surface-300);
}

.film-card__field {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.film-card__label {
    font-size: 9px;
    font-weight: 500;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--text-dim);
}

.film-card__value {
    font-size: 12px;
    font-weight: 400;
    color: var(--text-primary);
}

.film-card__value--mono {
    font-size: 9px;
    color: var(--text-dim);
    word-break: break-all;
}

.film-card__description {
    padding: 10px 16px;
    border-bottom: 1px solid var(--surface-300);
    max-height: 120px;
    overflow-y: auto;
}

.film-card__description p {
    font-size: 10px;
    line-height: 1.7;
    color: var(--text-secondary);
}

.film-card__style {
    padding: 8px 16px 12px 16px;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

/* ---- Sidebar actions ---- */

.sidebar__actions {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* ---- Buttons ---- */

.button {
    display: block;
    width: 100%;
    padding: 8px 16px;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    border: 1px solid transparent;
    border-radius: var(--radius-small);
    cursor: pointer;
    transition: all var(--transition);
    text-align: center;
}

.button--primary {
    background-color: var(--amber-dim);
    color: var(--surface-000);
    border-color: var(--amber-dim);
}

.button--primary:hover {
    background-color: var(--amber);
    border-color: var(--amber);
}

.button--secondary {
    background-color: transparent;
    color: var(--text-secondary);
    border-color: var(--surface-400);
}

.button--secondary:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

/* ---- Main content ---- */

.main {
    flex: 1;
    padding: 28px 32px;
    overflow-y: auto;
}

/* ---- Drop zone ---- */

.drop-zone {
    padding: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: 1px dashed var(--surface-400);
    border-radius: var(--radius-small);
    margin-bottom: 24px;
    transition: all var(--transition);
    background-color: var(--surface-100);
}

/* Hide the native file input completely. */
.drop-zone__input {
    display: none;
}

.drop-zone__content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.drop-zone__icon {
    font-size: 24px;
    color: var(--text-dim);
    transition: color var(--transition);
}

.drop-zone__prompt {
    font-size: 13px;
    color: var(--text-secondary);
    transition: color var(--transition);
}

.drop-zone__hint {
    font-size: 10px;
    color: var(--text-dim);
    letter-spacing: 1px;
}

.drop-zone:hover {
    border-color: var(--amber-dim);
    background-color: var(--surface-200);
}

.drop-zone:hover .drop-zone__icon,
.drop-zone:hover .drop-zone__prompt {
    color: var(--amber-glow);
}

.drop-zone--over {
    border-style: solid;
    border-color: var(--amber);
    background-color: var(--surface-200);
}

.drop-zone--over .drop-zone__icon,
.drop-zone--over .drop-zone__prompt {
    color: var(--amber);
}

/* ---- Sheet header (film rebate strip) ---- */

.sheet-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 12px;
    margin-bottom: 2px;
    background-color: var(--film-rebate);
    border: 1px solid var(--surface-300);
    border-bottom: none;
    font-size: 10px;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.sheet-header__title {
    color: var(--amber-dim);
}

.sheet-header__film-edge {
    color: var(--text-dim);
}

/* ---- Contact sheet ---- */

.contact-sheet {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 2px;
    background-color: var(--surface-300);
    border: 1px solid var(--surface-300);
    padding: 2px;
    margin-bottom: 40px;
}

/* ---- Negative frame ---- */

.negative {
    background-color: var(--surface-100);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.negative__frame-number {
    position: absolute;
    top: 4px;
    left: 6px;
    font-size: 9px;
    font-weight: 300;
    color: var(--amber-dim);
    letter-spacing: 1px;
    z-index: 1;
    opacity: 0.7;
}

/* ---- Remove button ---- */

.negative__remove {
    position: absolute;
    top: 4px;
    right: 4px;
    z-index: 2;
    width: 18px;
    height: 18px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.6);
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 18px;
    text-align: center;
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition), background-color var(--transition),
                color var(--transition);
}

.negative:hover .negative__remove {
    opacity: 1;
}

.negative__remove:hover {
    background-color: var(--safelight);
    color: var(--text-primary);
}

/* ---- Preview ---- */

.negative__preview {
    width: 100%;
    aspect-ratio: 3 / 2;
    background-color: var(--surface-000);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.negative__preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: opacity 300ms ease;
}

.negative__preview--loading {
    opacity: 0.4;
}

.negative__preview--loading::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 16px;
    margin: -8px 0 0 -8px;
    border: 1px solid var(--surface-400);
    border-top-color: var(--amber-dim);
    border-radius: 50%;
    animation: spin 800ms linear infinite;
}

/* ---- Negative info bar ---- */

.negative__info {
    padding: 6px 8px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    background-color: var(--surface-200);
    border-top: 1px solid var(--surface-300);
}

.negative__id {
    font-size: 9px;
    color: var(--text-dim);
    letter-spacing: 1px;
    font-weight: 300;
}

.negative__style {
    appearance: none;
    -webkit-appearance: none;
    background-color: var(--surface-100);
    color: var(--text-primary);
    border: 1px solid var(--surface-400);
    border-radius: var(--radius-small);
    padding: 3px 6px;
    font-family: var(--font-mono);
    font-size: 10px;
    cursor: pointer;
    width: 100%;
    transition: border-color var(--transition);
    /* Custom dropdown arrow. */
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='5' viewBox='0 0 8 5'%3E%3Cpath d='M0 0l4 5 4-5z' fill='%238A8580'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 6px center;
    padding-right: 18px;
}

.negative__style:hover {
    border-color: var(--amber-dim);
}

.negative__style:focus {
    outline: none;
    border-color: var(--amber);
}

/* ---- Processing status ---- */

.negative__status {
    font-size: 9px;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    min-height: 14px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.negative__status--queued {
    color: var(--amber-dim);
}

.negative__status--processing {
    color: var(--amber);
}

.negative__status--completed {
    color: #5A8A5A;
}

.negative__status--failed {
    color: var(--safelight);
}

/* ---- Spinner ---- */

.spinner {
    width: 10px;
    height: 10px;
    border: 1px solid var(--surface-400);
    border-top-color: var(--amber);
    border-radius: 50%;
    animation: spin 800ms linear infinite;
    display: inline-block;
    flex-shrink: 0;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ---- Scrollbar ---- */

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--surface-000);
}

::-webkit-scrollbar-thumb {
    background: var(--surface-400);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-dim);
}