:root {
    --bg: #f4efe7;
    --bg-soft: #fbf8f3;
    --card: #fffdf9;
    --line: #d9cfc1;
    --text: #1f1f1f;
    --muted: #6f6558;
    --accent: #12664f;
    --error: #7c2d12;
    --error-bg: #fde7df;
    --warn: #92400e;
    --warn-bg: #ffedd5;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Segoe UI", Tahoma, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top right, rgba(18, 102, 79, 0.08), transparent 30%),
        linear-gradient(180deg, var(--bg) 0%, #efe8dd 100%);
}

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

button,
input,
textarea {
    font: inherit;
}

button {
    border: 0;
    border-radius: 10px;
    padding: 0.75rem 1rem;
    background: var(--accent);
    color: white;
    cursor: pointer;
}

.ghost-button,
.ghost-link {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
    padding: 0.65rem 0.9rem;
    border-radius: 10px;
}

.shell-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem 2rem 0;
}

.shell-nav,
.split-header,
.action-row,
.inline-form,
.inline-checkbox {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    flex-wrap: wrap;
}

.shell-main {
    padding: 1.5rem 2rem 2rem;
}

.card {
    background: var(--card);
    border: 1px solid rgba(31, 31, 31, 0.08);
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(31, 31, 31, 0.05);
    padding: 1.25rem;
    margin-bottom: 1rem;
}

.narrow-card {
    max-width: 460px;
    margin: 5rem auto 0;
}

.grid-two {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.stack-form {
    display: grid;
    gap: 0.9rem;
}

.stack-form label span,
.stats dt {
    display: block;
    margin-bottom: 0.35rem;
    color: var(--muted);
}

input,
textarea {
    width: 100%;
    padding: 0.8rem 0.9rem;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--bg-soft);
}

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

.table th,
.table td {
    padding: 0.75rem 0.5rem;
    border-bottom: 1px solid rgba(31, 31, 31, 0.08);
    text-align: left;
    vertical-align: top;
}

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

.error-box,
.warning-box {
    padding: 0.8rem 1rem;
    border-radius: 14px;
    margin-bottom: 1rem;
}

.error-box {
    color: var(--error);
    background: var(--error-bg);
}

.warning-box {
    color: var(--warn);
    background: var(--warn-bg);
}

.stats {
    display: grid;
    gap: 0.7rem;
}

.stats div {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
}

.thread,
.change-list {
    display: grid;
    gap: 0.8rem;
}

.message,
.change-card {
    border-radius: 16px;
    border: 1px solid rgba(31, 31, 31, 0.08);
    padding: 0.9rem;
    background: var(--bg-soft);
}

.message header {
    margin-bottom: 0.5rem;
    color: var(--muted);
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.06em;
}

.message pre,
.log-panel {
    margin: 0;
    white-space: pre-wrap;
    word-break: break-word;
    font-family: Consolas, "Courier New", monospace;
    font-size: 0.9rem;
}

.section-spacer {
    height: 1.25rem;
}

@media (max-width: 720px) {
    .shell-header,
    .shell-main {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}