:root {
    --bg: #eef2ff;
    --surface: #ffffff;
    --surface-soft: #f8f9ff;
    --border: #d7ddf5;
    --text: #19233c;
    --text-soft: #5e6a86;
    --primary: #4a3aff;
    --primary-dark: #3522ef;
    --success: #157347;
    --danger: #b42318;
    --shadow: 0 18px 45px rgba(59, 76, 125, 0.12);
    --radius: 22px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(180deg, #f4f6ff 0%, #eef2ff 100%);
    color: var(--text);
}

a {
    color: var(--primary);
    text-decoration: none;
}

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

.app-shell {
    min-height: 100vh;
    padding-bottom: 94px;
}

.page-container {
    max-width: 920px;
    margin: 0 auto;
    padding: 24px 18px 0;
}

.hero-card,
.panel,
.feature-card,
.info-card {
    background: var(--surface);
    border: 1px solid rgba(215, 221, 245, 0.75);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.hero-card {
    padding: 30px;
}

.hero-card h1,
.page-header h1,
.panel h2 {
    margin: 0 0 12px;
}

.hero-card p,
.page-header p,
.feature-card p,
.panel p,
.empty-state p,
.sync-log-item p {
    margin: 0;
    color: var(--text-soft);
    line-height: 1.7;
}

.hero-card__actions,
.button-row,
.field-group,
.meta-row,
.messages-header {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.hero-card__actions,
.button-row {
    margin-top: 22px;
}

.hero-card__meta,
.meta-row {
    margin-top: 18px;
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    color: var(--text-soft);
    font-size: 0.95rem;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
    margin-top: 22px;
}

.feature-card,
.info-card,
.panel {
    padding: 22px;
}

.page-header {
    margin-bottom: 18px;
}

.eyebrow {
    display: inline-flex;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(74, 58, 255, 0.1);
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.button {
    border: none;
    border-radius: 16px;
    padding: 12px 18px;
    cursor: pointer;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    font-weight: 600;
}

.button--primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
}

.button--ghost {
    background: var(--surface-soft);
    border: 1px solid var(--border);
    color: var(--text);
}

.button--full {
    width: 100%;
}

.stack {
    display: grid;
    gap: 16px;
}

.field {
    display: grid;
    gap: 8px;
}

.field span {
    font-weight: 600;
}

.field input,
.field select {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 14px 16px;
    background: #fff;
}

.field-group input {
    flex: 1;
}

.result-card {
    display: grid;
    gap: 12px;
}

.tag-list,
.attachment-list {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.tag {
    display: inline-flex;
    padding: 7px 12px;
    border-radius: 999px;
    background: rgba(74, 58, 255, 0.1);
    color: var(--primary);
    font-weight: 600;
    font-size: 0.9rem;
}

.tag--soft {
    background: var(--surface-soft);
    color: var(--text-soft);
    border: 1px solid var(--border);
}

.hidden {
    display: none !important;
}

.alert {
    margin-top: 16px;
    padding: 14px 16px;
    border-radius: 16px;
    background: rgba(74, 58, 255, 0.1);
    color: var(--primary);
}

.alert--error {
    background: rgba(180, 35, 24, 0.1);
    color: var(--danger);
}

.alert--success {
    background: rgba(21, 115, 71, 0.1);
    color: var(--success);
}

.message-list {
    display: grid;
    gap: 14px;
    margin-top: 16px;
}

.message-item {
    display: grid;
    gap: 8px;
    padding: 18px;
    border-radius: 18px;
    background: var(--surface-soft);
    border: 1px solid var(--border);
    color: inherit;
}

.message-item--unread {
    border-color: rgba(74, 58, 255, 0.5);
}

.message-item__head {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: center;
}

.message-item__from {
    color: var(--text-soft);
    font-size: 0.95rem;
}

.empty-state {
    text-align: center;
    padding: 36px 22px;
}

.message-meta {
    display: grid;
    gap: 10px;
}

.message-body__head {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 18px;
}

.message-view-switch {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.message-view-switch .button.is-active {
    background: rgba(74, 58, 255, 0.14);
    color: var(--primary);
    border-color: rgba(74, 58, 255, 0.3);
}

.message-view-panel {
    display: none;
}

.message-view-panel.is-active {
    display: block;
}

.message-body {
    line-height: 1.8;
}

.message-body pre {
    white-space: pre-wrap;
    word-break: break-word;
    margin: 0;
}

.message-html-preview {
    padding: 18px;
    border-radius: 18px;
    background: var(--surface-soft);
    border: 1px solid var(--border);
    overflow-wrap: anywhere;
}

.message-html-preview table {
    width: 100%;
    border-collapse: collapse;
}

.message-html-preview td,
.message-html-preview th {
    border: 1px solid var(--border);
    padding: 8px 10px;
}

.attachment-link {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    width: 100%;
    padding: 14px 16px;
    border-radius: 16px;
    background: var(--surface-soft);
    border: 1px solid var(--border);
    color: inherit;
}

.attachment-stack {
    display: grid;
    gap: 16px;
}

.attachment-card {
    padding: 16px;
    border-radius: 18px;
    background: var(--surface-soft);
    border: 1px solid var(--border);
    display: grid;
    gap: 14px;
}

.attachment-card__head {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    align-items: flex-start;
    flex-wrap: wrap;
}

.attachment-card__meta {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    color: var(--text-soft);
    font-size: 0.92rem;
    margin-top: 6px;
}

.attachment-card__actions {
    margin-top: 0;
}

.attachment-preview {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: #fff;
}

.attachment-preview--image {
    max-height: 420px;
    object-fit: contain;
}

.attachment-preview--frame {
    min-height: 380px;
}

.attachment-preview--media {
    display: block;
}

.sync-log-list {
    display: grid;
    gap: 14px;
}

.sync-log-item {
    padding: 16px;
    border-radius: 16px;
    background: var(--surface-soft);
    border: 1px solid var(--border);
}

.sync-log-item__head {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 8px;
}

.bottom-nav {
    position: fixed;
    left: 50%;
    bottom: 16px;
    transform: translateX(-50%);
    width: min(92%, 640px);
    background: rgba(255, 255, 255, 0.94);
    border: 1px solid rgba(215, 221, 245, 0.9);
    border-radius: 24px;
    box-shadow: var(--shadow);
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    padding: 10px;
    backdrop-filter: blur(10px);
}

.bottom-nav__item {
    text-align: center;
    padding: 12px;
    border-radius: 16px;
    color: var(--text-soft);
    font-weight: 600;
}

.bottom-nav__item.is-active {
    background: rgba(74, 58, 255, 0.1);
    color: var(--primary);
}

@media (max-width: 640px) {
    .page-container {
        padding: 18px 14px 0;
    }

    .hero-card,
    .panel,
    .feature-card,
    .info-card {
        border-radius: 18px;
    }

    .message-item__head,
    .sync-log-item__head,
    .message-body__head,
    .attachment-card__head {
        flex-direction: column;
        align-items: flex-start;
    }
}