:root {
    color-scheme: light;
    --bg: #f6f7f9;
    --fg: #1b1c1f;
    --muted: #5c6068;
    --card: #ffffff;
    --card-2: #f0f2f5;
    --border: #d9dbe0;
    --border-strong: #b9bdc6;
    --link: #0b57d0;
    --accent: #0b57d0;
    --accent-fg: #ffffff;
    --danger: #b3261e;
    --star: #f2a400;
    --mark: #ffe680;
    --shadow: 0 1px 2px rgb(0 0 0 / 8%);
    --radius: 10px;
}

html[data-theme="dark"] {
    color-scheme: dark;
    --bg: #111215;
    --fg: #e8e9ec;
    --muted: #a2a7b0;
    --card: #1b1d22;
    --card-2: #24272d;
    --border: #34373e;
    --border-strong: #4a4e57;
    --link: #8ab4f8;
    --accent: #8ab4f8;
    --accent-fg: #10203a;
    --danger: #f2b8b5;
    --star: #fdd663;
    --mark: #665c00;
    --shadow: 0 1px 2px rgb(0 0 0 / 40%);
}

@media (prefers-color-scheme: dark) {
    html[data-theme="system"] {
        color-scheme: dark;
        --bg: #111215;
        --fg: #e8e9ec;
        --muted: #a2a7b0;
        --card: #1b1d22;
        --card-2: #24272d;
        --border: #34373e;
        --border-strong: #4a4e57;
        --link: #8ab4f8;
        --accent: #8ab4f8;
        --accent-fg: #10203a;
        --danger: #f2b8b5;
        --star: #fdd663;
        --mark: #665c00;
        --shadow: 0 1px 2px rgb(0 0 0 / 40%);
    }
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
}

body {
    background: var(--bg);
    color: var(--fg);
    font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

a {
    color: var(--link);
}

button,
input,
select,
textarea {
    font: inherit;
    color: inherit;
}

button {
    cursor: pointer;
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

mark {
    background: var(--mark);
    color: inherit;
    border-radius: 2px;
}

.muted {
    color: var(--muted);
}

.visually-hidden {
    position: absolute !important;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
}

.icon {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

/* Auth --------------------------------------------------------------- */

.page {
    max-width: 30rem;
    margin: 8vh auto 4rem;
    padding: 0 1.25rem;
}

.auth-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.35rem;
    font-weight: 650;
    margin-bottom: 1.5rem;
}

.brand-mark {
    display: inline-grid;
    place-items: center;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    background: var(--accent);
    color: var(--accent-fg);
    font-weight: 700;
}

.page > h1 {
    margin: 0 0 0.4rem;
    font-size: 1.6rem;
}

.auth-form,
.settings-form,
.create-label-form {
    display: grid;
    gap: 0.55rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    box-shadow: var(--shadow);
    margin-top: 1rem;
}

.auth-form label,
.settings-form label,
.create-label-form label {
    font-weight: 600;
    font-size: 0.9rem;
    margin-top: 0.35rem;
}

input[type="text"],
input[type="password"],
input[type="search"],
input[type="email"],
select,
textarea {
    background: var(--bg);
    border: 1px solid var(--border-strong);
    border-radius: 8px;
    padding: 0.55rem 0.65rem;
    min-width: 0;
}

input[type="color"] {
    width: 2.6rem;
    height: 2.2rem;
    padding: 0.15rem;
    background: var(--card);
    border: 1px solid var(--border-strong);
    border-radius: 8px;
}

.button,
.button-link,
.icon-button,
.toolbar-button,
.link-button {
    border: 1px solid var(--border-strong);
    background: var(--card);
    color: var(--fg);
    border-radius: 8px;
    padding: 0.45rem 0.8rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
}

.button {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--accent-fg);
    font-weight: 600;
    padding: 0.6rem 1rem;
    margin-top: 0.6rem;
}

.button-link:hover,
.toolbar-button:hover,
.icon-button:hover {
    background: var(--card-2);
}

.link-button {
    border: 0;
    background: none;
    padding: 0;
    color: var(--link);
    text-decoration: underline;
}

.icon-button {
    padding: 0.35rem;
    min-width: 2rem;
    min-height: 2rem;
}

.icon-button.is-on {
    color: var(--star);
}

.icon-button.is-on .icon {
    fill: currentColor;
}

.toolbar-button.danger {
    color: var(--danger);
}

.auth-note {
    color: var(--muted);
    margin-top: 1rem;
    font-size: 0.92rem;
}

.auth-logout {
    margin-top: 1.5rem;
}

.qr-box {
    display: grid;
    place-items: center;
    background: #ffffff;
    border-radius: var(--radius);
    padding: 1rem;
    margin: 1.25rem 0;
    width: max-content;
}

.qr-box svg {
    width: 220px;
    height: 220px;
}

.secret-row {
    color: var(--muted);
}

.secret {
    display: inline-block;
    background: var(--card-2);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.2rem 0.45rem;
    letter-spacing: 0.05em;
    color: var(--fg);
    overflow-wrap: anywhere;
}

.recovery-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.5rem;
    list-style: none;
    padding: 1rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.recovery-list code {
    font-size: 1.05rem;
    letter-spacing: 0.08em;
}

/* App shell ---------------------------------------------------------- */

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

.sidebar {
    width: 260px;
    flex: 0 0 260px;
    background: var(--card);
    border-right: 1px solid var(--border);
    padding: 1rem 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.2rem;
    font-weight: 650;
    padding: 0 0.5rem;
}

.folder-nav,
.sidebar-section {
    display: grid;
    gap: 1px;
}

.folder,
.label-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.42rem 0.6rem;
    border-radius: 8px;
    color: var(--fg);
    text-decoration: none;
    font-size: 0.94rem;
}

.folder:hover,
.label-row:hover {
    background: var(--card-2);
}

.folder.is-active,
.label-row.is-active {
    background: var(--card-2);
    font-weight: 650;
}

.folder .count,
.label-row .count {
    margin-left: auto;
    font-size: 0.8rem;
    color: var(--muted);
    font-variant-numeric: tabular-nums;
}

.sidebar-section {
    border-top: 1px solid var(--border);
    padding-top: 0.8rem;
}

.sidebar-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.2rem 0.6rem;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--muted);
}

.sidebar-heading a {
    text-decoration: none;
    font-size: 1.1rem;
    line-height: 1;
}

.label-row {
    padding-left: calc(0.6rem + var(--depth, 0) * 0.85rem);
}

.label-dot {
    width: 0.65rem;
    height: 0.65rem;
    border-radius: 50%;
    flex: 0 0 auto;
    background: var(--border-strong);
}

.label-dot.is-empty {
    background: transparent;
    border: 1px solid var(--border-strong);
}

.label-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sidebar-footer {
    margin-top: auto;
    padding: 0.75rem 0.6rem 0;
    border-top: 1px solid var(--border);
}

.content {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.topbar {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.7rem 1.25rem;
    background: var(--card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 5;
}

.search {
    flex: 1;
    max-width: 42rem;
}

.search input {
    width: 100%;
    background: var(--card-2);
    border-color: transparent;
    padding: 0.6rem 0.85rem;
    border-radius: 999px;
}

.search input:focus {
    border-color: var(--border-strong);
    background: var(--bg);
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: auto;
}

.mail {
    width: 100%;
    max-width: 72rem;
    padding: 1.25rem;
}

.mail-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.9rem;
}

.mail-header h1 {
    font-size: 1.35rem;
    margin: 0;
}

.mail-summary {
    color: var(--muted);
    font-size: 0.9rem;
    margin: 0;
}

/* Thread list -------------------------------------------------------- */

.bulk-form {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.bulk-toolbar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.45rem;
    padding: 0.55rem 0.75rem;
    border-bottom: 1px solid var(--border);
    background: var(--card-2);
    font-size: 0.88rem;
}

.check-all {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    margin-right: 0.4rem;
}

.toolbar-labels {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-left: auto;
}

.toolbar-labels select {
    max-width: 12rem;
    padding: 0.35rem 0.5rem;
}

.thread-list {
    display: grid;
}

.thread-row {
    display: grid;
    grid-template-columns: 1.5rem 2rem minmax(7rem, 11rem) minmax(0, 1fr) 1.5rem 7.5rem;
    align-items: center;
    gap: 0.75rem;
    padding: 0.55rem 0.85rem;
    border-bottom: 1px solid var(--border);
    text-decoration: none;
    color: inherit;
}

.thread-row:last-child {
    border-bottom: 0;
}

.thread-row:hover {
    background: var(--card-2);
}

.thread-row.is-unread {
    background: color-mix(in srgb, var(--accent) 6%, transparent);
}

.thread-row.is-unread .thread-subject,
.thread-row.is-unread .thread-senders {
    font-weight: 700;
}

.thread-check {
    width: 1rem;
    height: 1rem;
    accent-color: var(--accent);
}

.star-button {
    border: 0;
    background: none;
    color: var(--border-strong);
    padding: 0.2rem;
    line-height: 1;
}

.star-button .icon {
    fill: currentColor;
}

.star-button:hover {
    color: var(--star);
}

.star-button.is-on {
    color: var(--star);
}

.thread-senders {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.92rem;
}

.thread-main {
    min-width: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0 0.5rem;
}

.thread-subject {
    color: var(--fg);
    text-decoration: none;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.thread-subject:hover {
    text-decoration: underline;
}

.thread-snippet {
    color: var(--muted);
    font-size: 0.88rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 100%;
}

.thread-labels {
    display: inline-flex;
    gap: 0.25rem;
    flex-wrap: wrap;
    flex-basis: 100%;
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
    border: 1px solid var(--border-strong);
    border-radius: 999px;
    padding: 0.05rem 0.5rem;
    font-size: 0.74rem;
    color: var(--muted);
    background: var(--card);
    white-space: nowrap;
}

.chip-remove {
    border: 0;
    background: none;
    color: var(--muted);
    padding: 0;
    font-size: 0.95rem;
    line-height: 1;
}

.chip-remove:hover {
    color: var(--danger);
}

.paperclip {
    color: var(--muted);
    display: inline-flex;
}

.thread-date {
    color: var(--muted);
    font-size: 0.82rem;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.pagination {
    display: flex;
    justify-content: center;
    margin: 1rem 0;
}

.empty-state {
    background: var(--card);
    border: 1px dashed var(--border-strong);
    border-radius: var(--radius);
    padding: 2rem;
    text-align: center;
    color: var(--muted);
}

/* Conversation ------------------------------------------------------- */

.back-link {
    font-size: 0.85rem;
    text-decoration: none;
}

.thread-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.8rem;
}

.thread-header h1 {
    font-size: 1.4rem;
    margin: 0.3rem 0;
    overflow-wrap: anywhere;
}

.thread-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.label-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 0;
    margin-bottom: 1rem;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

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

.label-add {
    display: flex;
    gap: 0.35rem;
    align-items: center;
    margin-left: auto;
    flex-wrap: wrap;
}

.label-add select,
.label-add input[type="text"] {
    padding: 0.35rem 0.5rem;
    max-width: 13rem;
}

.messages {
    display: grid;
    gap: 1rem;
}

.message {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.message.is-starred {
    border-color: color-mix(in srgb, var(--star) 45%, var(--border));
}

.message-header {
    display: flex;
    align-items: flex-start;
    gap: 0.7rem;
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border);
}

.avatar {
    display: inline-grid;
    place-items: center;
    width: 2.2rem;
    height: 2.2rem;
    border-radius: 50%;
    background: var(--accent);
    color: var(--accent-fg);
    font-weight: 650;
    flex: 0 0 auto;
}

.message-meta {
    min-width: 0;
    flex: 1;
}

.message-from {
    display: flex;
    gap: 0.35rem;
    flex-wrap: wrap;
    overflow-wrap: anywhere;
}

.recipients {
    color: var(--muted);
    font-size: 0.84rem;
    margin-top: 0.15rem;
}

.recipients summary {
    cursor: pointer;
}

.recipients dl {
    display: grid;
    grid-template-columns: 3rem 1fr;
    gap: 0.2rem 0.5rem;
    margin: 0.4rem 0 0;
    overflow-wrap: anywhere;
}

.recipients dt {
    font-weight: 600;
}

.recipients dd {
    margin: 0;
}

.message-actions {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--muted);
    font-size: 0.82rem;
    white-space: nowrap;
}

.message-actions form {
    margin: 0;
}

.message-body {
    padding: 0.9rem 1rem 1rem;
}

.mail-frame {
    width: 100%;
    min-height: 320px;
    height: 480px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: #ffffff;
}

.frame-links {
    font-size: 0.8rem;
    margin: 0.4rem 0 0;
    color: var(--muted);
}

.plain-body,
.plain-text pre {
    margin: 0;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    font: 14px/1.55 ui-monospace, "Cascadia Mono", Menlo, Consolas, monospace;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.8rem;
}

.plain-text {
    margin-top: 0.6rem;
}

.plain-text summary {
    color: var(--muted);
    font-size: 0.85rem;
    cursor: pointer;
}

.attachments {
    margin-top: 0.9rem;
    border-top: 1px solid var(--border);
    padding-top: 0.8rem;
}

.attachments-title {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.9rem;
    margin: 0 0 0.5rem;
}

.attachments ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.attachments li {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--card-2);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.4rem 0.55rem;
    max-width: 100%;
}

.attachments li a {
    display: inline-flex;
    gap: 0.4rem;
    align-items: baseline;
    text-decoration: none;
    min-width: 0;
}

.attachment-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 18rem;
}

.preview-link {
    font-size: 0.78rem;
}

/* Labels beheren / settings ------------------------------------------ */

.settings-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.1rem 1.25rem;
    box-shadow: var(--shadow);
    margin-bottom: 1.2rem;
}

.settings-card h2 {
    font-size: 1.05rem;
    margin: 0 0 0.6rem;
}

fieldset {
    border: 0;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 0.3rem;
}

legend {
    font-weight: 600;
    margin-bottom: 0.2rem;
}

.radio-row {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 400 !important;
}

.create-label-form {
    grid-template-columns: max-content minmax(0, 1fr);
    align-items: center;
    margin-top: 0.5rem;
    box-shadow: none;
}

.settings-form {
    box-shadow: none;
    margin-top: 0.5rem;
}

.manage-label-list {
    display: grid;
    gap: 0.2rem;
}

.manage-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    padding: 0.5rem 0.5rem 0.5rem calc(0.5rem + var(--depth, 0) * 1rem);
    border-bottom: 1px solid var(--border);
}

.manage-label:last-child {
    border-bottom: 0;
}

.manage-label.is-deleted .manage-label-name {
    text-decoration: line-through;
    color: var(--muted);
}

.manage-label-main {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 12rem;
    flex: 1;
    overflow-wrap: anywhere;
}

.manage-label-actions {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.inline-form {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.inline-form input[type="text"] {
    width: 16rem;
    max-width: 45vw;
    padding: 0.35rem 0.5rem;
}

.badge {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0.05rem 0.4rem;
}

/* Flash -------------------------------------------------------------- */

.message-flash,
.flash {
    border-radius: 8px;
    padding: 0.6rem 0.8rem;
    margin: 0 0 0.9rem;
    border: 1px solid var(--border);
    background: var(--card);
}

.flash-success {
    border-color: color-mix(in srgb, #1e8e3e 50%, var(--border));
}

.flash-error {
    border-color: color-mix(in srgb, var(--danger) 55%, var(--border));
    color: var(--danger);
}

/* Responsive --------------------------------------------------------- */

@media (max-width: 900px) {
    .thread-row {
        grid-template-columns: 1.5rem 2rem minmax(0, 1fr) 1.5rem 6rem;
    }

    .thread-senders {
        display: none;
    }
}

@media (max-width: 700px) {
    .app {
        display: block;
    }

    .sidebar {
        position: static;
        width: auto;
        height: auto;
        flex: none;
        border-right: 0;
        border-bottom: 1px solid var(--border);
    }

    .thread-row {
        grid-template-columns: 1.25rem 1.75rem minmax(0, 1fr) 5.5rem;
        gap: 0.5rem;
    }

    .paperclip {
        display: none;
    }

    .label-add {
        margin-left: 0;
    }

    .message-actions time {
        display: none;
    }

    .create-label-form {
        grid-template-columns: 1fr;
    }

    .mail {
        padding: 0.9rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        scroll-behavior: auto !important;
        transition: none !important;
    }
}