:root {
    color-scheme: light dark;
    --bg: #f6f7f4;
    --fg: #1a1f16;
    --muted: #5c6658;
    --card: #ffffff;
    --accent: #2f6b3a;
    --accent-fg: #ffffff;
    --border: #d5dcd0;
    --error: #9b1c1c;
    --error-bg: #fdecec;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #121510;
        --fg: #eef2ea;
        --muted: #a3aea0;
        --card: #1c211a;
        --accent: #6cbc78;
        --accent-fg: #102014;
        --border: #323a2f;
        --error: #ffb4b4;
        --error-bg: #3a1a1a;
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--fg);
    line-height: 1.45;
}

.site-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border);
    background: var(--card);
}

.brand {
    font-weight: 700;
    text-decoration: none;
    color: var(--fg);
}

nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
}

nav a {
    color: var(--accent);
}

.user-name {
    color: var(--muted);
    font-size: 0.95rem;
}

.container {
    max-width: 40rem;
    margin: 0 auto;
    padding: 1.25rem 1rem 3rem;
}

.stack-form {
    display: grid;
    gap: 0.55rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1rem;
}

.stack-form label {
    font-weight: 600;
    margin-top: 0.35rem;
}

.stack-form input[type="text"],
.stack-form input[type="password"],
.stack-form input[type="date"] {
    width: 100%;
    padding: 0.65rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    background: transparent;
    color: var(--fg);
    font-size: 1rem;
}

button,
.button {
    display: inline-block;
    border: none;
    border-radius: 0.5rem;
    padding: 0.7rem 1rem;
    background: var(--accent);
    color: var(--accent-fg);
    font: inherit;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    text-align: center;
    touch-action: manipulation;
}

button.secondary {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
}

.inline-form {
    display: inline;
    margin: 0;
}

.inline-form button {
    padding: 0.35rem 0.65rem;
    font-size: 0.9rem;
}

.error {
    background: var(--error-bg);
    color: var(--error);
    padding: 0.75rem 0.9rem;
    border-radius: 0.5rem;
}

.flash-list {
    list-style: none;
    padding: 0;
    margin: 0 0 1rem;
}

.flash-error {
    background: var(--error-bg);
    color: var(--error);
    padding: 0.7rem 0.9rem;
    border-radius: 0.5rem;
}

.obs-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 0.65rem;
}

.obs-item {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 0.65rem;
    padding: 0.8rem 0.9rem;
}

.obs-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    color: var(--muted);
    font-size: 0.92rem;
    margin-top: 0.25rem;
}

.muted {
    color: var(--muted);
    margin-left: 0.35rem;
}

.taxon-results {
    list-style: none;
    margin: 0;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    background: var(--card);
    max-height: 14rem;
    overflow: auto;
}

.taxon-results li button {
    width: 100%;
    background: transparent;
    color: var(--fg);
    text-align: left;
    border-radius: 0;
    font-weight: 500;
    border-bottom: 1px solid var(--border);
}

.taxon-results li:last-child button {
    border-bottom: none;
}

.details {
    white-space: pre-wrap;
    overflow-x: auto;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 0.75rem;
    font-size: 0.85rem;
}

code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

[hidden] {
    display: none !important;
}

#app,
#view-start,
#view-session,
#view-done {
    display: grid;
    gap: 1rem;
}

#app h1 {
    margin: 0;
    font-size: 1.6rem;
}

#app p {
    margin: 0;
}

.status {
    font-weight: 700;
}

#app button,
#observe-form input[type="text"] {
    min-height: 3rem;
    font-size: 1.125rem;
}

.primary-action,
#discard-session {
    width: 100%;
}

button:disabled {
    opacity: 0.55;
    cursor: default;
}

.session-actions {
    display: grid;
    gap: 0.75rem;
}

.obs-name {
    font-size: 1.25rem;
    font-weight: 700;
}

.obs-item {
    display: grid;
    gap: 0.4rem;
}

.error p {
    margin: 0;
}

.error .details {
    margin: 0.6rem 0 0;
    background: transparent;
    border: none;
    padding: 0;
    color: inherit;
}

.error button {
    margin-top: 0.75rem;
}

.map-wrap {
    position: relative;
}

#map {
    height: min(62dvh, 36rem);
    min-height: 18rem;
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    background: #d5dcd0;
}

#map,
#map * {
    box-sizing: content-box;
}

.leaflet-container img {
    max-width: none !important;
    max-height: none !important;
}

#map .leaflet-control-zoom a {
    width: 2.25rem;
    height: 2.25rem;
    line-height: 2.25rem;
    font-size: 1.15rem;
}

.pin-actions {
    position: absolute;
    z-index: 650;
    left: 0.75rem;
    right: 0.75rem;
    bottom: 1.6rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.pin-actions button {
    width: 100%;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.35);
}

.pin-actions .secondary {
    background: var(--card);
}

#observe-dialog {
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 0;
    background: var(--card);
    color: var(--fg);
    width: min(32rem, calc(100vw - 2rem));
}

#observe-dialog::backdrop {
    background: rgba(0, 0, 0, 0.55);
}

#observe-dialog .stack-form {
    border: none;
    background: transparent;
}

#observe-dialog h2 {
    margin: 0;
    font-size: 1.35rem;
}

#observe-dialog button {
    width: 100%;
}