:root {
    --bg: #f6f7f9;
    --panel: #ffffff;
    --text: #172033;
    --muted: #657086;
    --line: #d9dee8;
    --primary: #176b5b;
    --primary-dark: #0f4c40;
    --danger: #b42318;
    --success-bg: #e8f5ee;
    --error-bg: #fdecec;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.5;
}

a {
    color: var(--primary);
    text-decoration-thickness: 2px;
}

.topbar {
    align-items: center;
    background: var(--panel);
    border-bottom: 1px solid var(--line);
    display: flex;
    justify-content: space-between;
    min-height: 64px;
    padding: 0 32px;
}

.brand {
    color: var(--text);
    font-size: 20px;
    font-weight: 700;
    text-decoration: none;
}

.nav {
    display: flex;
    gap: 18px;
}

.logout-form {
    margin: 0;
}

.link-button {
    background: transparent;
    color: var(--primary);
    min-height: 0;
    padding: 0;
    text-decoration: underline;
    text-decoration-thickness: 2px;
}

.link-button:hover {
    background: transparent;
    color: var(--primary-dark);
}

.page {
    margin: 0 auto;
    max-width: 1080px;
    padding: 32px 24px;
}

.notice,
.empty,
.auth-panel,
.form-panel {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 20px;
}

.notice.success {
    background: var(--success-bg);
}

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

.auth-panel,
.form-panel {
    max-width: 520px;
}

.dashboard-head {
    align-items: center;
    display: flex;
    justify-content: space-between;
    margin-bottom: 24px;
}

.eyebrow {
    color: var(--muted);
    font-size: 14px;
    font-weight: 700;
    margin: 0 0 4px;
    text-transform: uppercase;
}

h1,
h2 {
    line-height: 1.2;
    margin: 0;
}

h1 {
    font-size: 34px;
}

h2 {
    font-size: 20px;
}

.button,
button {
    background: var(--primary);
    border: 0;
    border-radius: 6px;
    color: #ffffff;
    cursor: pointer;
    display: inline-block;
    font: inherit;
    font-weight: 700;
    min-height: 44px;
    padding: 10px 16px;
    text-decoration: none;
}

button:hover,
.button:hover {
    background: var(--primary-dark);
}

button.danger {
    background: var(--danger);
}

.form,
.filters {
    display: grid;
    gap: 10px;
}

.form label,
.filters label {
    font-weight: 700;
}

.form label span {
    color: var(--muted);
    font-weight: 400;
}

input,
select,
textarea {
    border: 1px solid var(--line);
    border-radius: 6px;
    font: inherit;
    min-height: 44px;
    padding: 10px 12px;
    width: 100%;
}

textarea {
    resize: vertical;
}

.field-error {
    color: var(--danger);
    font-weight: 700;
}

input.input-error {
    border-color: var(--danger);
}

.filters {
    align-items: end;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    grid-template-columns: 1fr 1fr auto;
    margin-bottom: 20px;
    padding: 16px;
}

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

.habit-card {
    align-items: center;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    display: flex;
    gap: 18px;
    justify-content: space-between;
    padding: 18px;
}

.habit-card.done {
    border-color: var(--primary);
}

.habit-main {
    display: flex;
    gap: 14px;
}

.habit-main p {
    color: var(--muted);
    margin: 8px 0;
}

.category-dot {
    border-radius: 999px;
    flex: 0 0 14px;
    height: 14px;
    margin-top: 5px;
    width: 14px;
}

.habit-actions {
    align-items: center;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: flex-end;
}

@media (max-width: 720px) {
    .topbar,
    .dashboard-head,
    .habit-card {
        align-items: stretch;
        flex-direction: column;
    }

    .topbar {
        gap: 12px;
        padding: 16px 20px;
    }

    .nav {
        flex-wrap: wrap;
    }

    .filters {
        grid-template-columns: 1fr;
    }

    .habit-actions {
        justify-content: flex-start;
    }
}