* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, "Malgun Gothic", sans-serif;
    background: #f4f6f8;
    color: #172033;
}

a {
    color: inherit;
    text-decoration: none;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 60px;
    padding: 0 24px;
    border-bottom: 1px solid #d7dde6;
    background: #fff;
}

.topbar h1 {
    margin: 0;
    font-size: 18px;
}

.topbar nav {
    display: flex;
    gap: 14px;
    font-size: 14px;
}

.topbar nav a.active {
    color: #2b66d9;
    font-weight: 700;
}

.filterbar {
    display: flex;
    align-items: center;
    min-height: 56px;
    padding: 10px 24px;
    border-bottom: 1px solid #d7dde6;
    background: #fff;
}

.filterbar form {
    display: flex;
    align-items: center;
    gap: 10px;
}

.filterbar label {
    color: #475467;
    font-size: 13px;
    font-weight: 700;
}

.filterbar select,
.snippet-fields select {
    min-height: 34px;
    padding: 0 10px;
    border: 1px solid #b9c4d6;
    border-radius: 6px;
    background: #fff;
    color: #172033;
}

.viewer-layout {
    display: grid;
    grid-template-columns: 320px minmax(0, 1fr);
    min-height: calc(100vh - 116px);
}

.session-list {
    overflow-y: auto;
    padding: 18px;
    border-right: 1px solid #d7dde6;
    background: #fff;
}

.session-list h2 {
    margin: 0 0 14px;
    font-size: 15px;
}

.snippet-box {
    display: grid;
    gap: 8px;
    margin-bottom: 22px;
}

.snippet-fields {
    display: grid;
    gap: 8px;
}

.snippet-fields label {
    display: grid;
    gap: 4px;
    color: #475467;
    font-size: 12px;
}

.snippet-fields input {
    min-height: 34px;
    padding: 0 10px;
    border: 1px solid #b9c4d6;
    border-radius: 6px;
    color: #172033;
}

.snippet-box textarea {
    width: 100%;
    min-height: 78px;
    padding: 10px;
    border: 1px solid #b9c4d6;
    border-radius: 6px;
    resize: vertical;
    font-family: Consolas, "Courier New", monospace;
    font-size: 12px;
    line-height: 1.5;
}

.snippet-box button {
    min-height: 36px;
    border: 1px solid #2b66d9;
    border-radius: 6px;
    background: #2b66d9;
    color: #fff;
    font-weight: 700;
    cursor: pointer;
}

.session-link {
    display: grid;
    gap: 4px;
    padding: 12px;
    border: 1px solid #d7dde6;
    border-radius: 6px;
    margin-bottom: 10px;
    background: #fff;
}

.session-link.active {
    border-color: #2b66d9;
    background: #eef4ff;
}

.session-link strong {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 13px;
}

.session-link span,
.session-link small,
.muted {
    color: #667085;
}

.player-section {
    min-width: 0;
    padding: 24px;
}

.meta-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
    color: #475467;
    font-size: 13px;
}

.error {
    padding: 12px 14px;
    border: 1px solid #fecdca;
    border-radius: 6px;
    background: #fffbfa;
    color: #b42318;
}

.login-page {
    display: grid;
    place-items: center;
    min-height: 100vh;
}

.login-panel {
    width: min(420px, calc(100vw - 32px));
    padding: 24px;
    border: 1px solid #d7dde6;
    border-radius: 8px;
    background: #fff;
}

.login-panel h1 {
    margin: 0 0 20px;
    font-size: 22px;
}

.login-panel form,
.login-panel label {
    display: grid;
    gap: 8px;
}

.login-panel form {
    gap: 14px;
}

.login-panel input {
    min-height: 42px;
    padding: 0 12px;
    border: 1px solid #b9c4d6;
    border-radius: 6px;
}

.login-panel button {
    min-height: 42px;
    border: 1px solid #2b66d9;
    border-radius: 6px;
    background: #2b66d9;
    color: #fff;
    font-weight: 700;
    cursor: pointer;
}

.snippet-page {
    padding: 24px;
}

.snippet-panel {
    max-width: 760px;
}

.snippet-panel h2 {
    margin: 0 0 16px;
    font-size: 18px;
}