:root {
    color-scheme: light;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #f5f7f8;
    color: #1d252c;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: #f5f7f8;
}

a {
    color: inherit;
}

.app-shell {
    min-height: 100vh;
}

.top-bar {
    display: flex;
    align-items: center;
    gap: 24px;
    min-height: 56px;
    padding: 0 24px;
    border-bottom: 1px solid #d7dde2;
    background: #ffffff;
}

.brand {
    font-weight: 700;
    text-decoration: none;
}

.primary-nav {
    display: flex;
    gap: 16px;
    color: #53606b;
    font-size: 14px;
}

.primary-nav a {
    text-decoration: none;
}

.primary-nav a:hover {
    color: #1d252c;
}

.main-content {
    width: min(1080px, 100%);
    margin: 0 auto;
    padding: 32px 24px;
}

.page-header {
    margin-bottom: 24px;
}

.page-header h1 {
    margin: 0 0 8px;
    font-size: 28px;
    line-height: 1.25;
}

.page-header p {
    margin: 0;
    color: #53606b;
}

.login-page {
    display: flex;
    justify-content: center;
}

.login-panel {
    width: min(420px, 100%);
    padding: 28px;
    border: 1px solid #d7dde2;
    border-radius: 12px;
    background: #ffffff;
    box-shadow: 0 12px 32px rgba(29, 37, 44, 0.08);
}

.login-subtitle {
    margin-top: 8px;
    color: #53606b;
}

.login-error {
    margin: 16px 0;
    padding: 10px 12px;
    border: 1px solid #f0b7c3;
    border-radius: 8px;
    background: #fff4f6;
    color: #b42318;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    color: #53606b;
}

.form-group input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #c8d1d8;
    border-radius: 8px;
    background: #ffffff;
    font-size: 14px;
}

.login-button {
    min-height: 40px;
    padding: 0 16px;
    border: 0;
    border-radius: 8px;
    background: #216869;
    color: #ffffff;
    font-weight: 700;
    cursor: pointer;
}

.login-button:hover {
    background: #1b5758;
}

.calendar-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 16px;
}

.calendar-controls {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.button-link {
    display: inline-flex;
    align-items: center;
    min-height: 36px;
    padding: 0 14px;
    border: 1px solid #c8d1d8;
    border-radius: 6px;
    background: #ffffff;
    color: #1d252c;
    font-weight: 600;
    text-decoration: none;
}

.button-link:hover {
    background: #eef3f5;
}

.panel {
    padding: 20px;
    border: 1px solid #d7dde2;
    border-radius: 8px;
    background: #ffffff;
}

.panel h2 {
    margin: 0 0 12px;
    font-size: 18px;
}

.panel ul {
    margin: 0;
    padding-left: 20px;
}

.panel li + li {
    margin-top: 6px;
}

.calendar-panel h2 {
    margin: 0 0 16px;
    font-size: 22px;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
}

.calendar-weekdays {
    border: 1px solid #d7dde2;
    border-bottom: 0;
    background: #eef3f5;
    color: #53606b;
    font-size: 13px;
    font-weight: 700;
    text-align: center;
}

.calendar-weekdays div {
    padding: 10px 4px;
}

.calendar-days {
    border-top: 1px solid #d7dde2;
    border-left: 1px solid #d7dde2;
}

.calendar-day {
    display: flex;
    min-height: 96px;
    padding: 10px;
    border-right: 1px solid #d7dde2;
    border-bottom: 1px solid #d7dde2;
    background: #ffffff;
}

.day-link {
    color: inherit;
    text-decoration: none;
}

.day-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 999px;
    font-weight: 700;
}

.outside-month {
    background: #f7f9fa;
    color: #9aa6af;
}

.today .day-number {
    background: #216869;
    color: #ffffff;
}

@media (max-width: 640px) {
    .top-bar,
    .calendar-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .top-bar {
        gap: 8px;
        padding: 12px 16px;
    }

    .main-content {
        padding: 24px 16px;
    }

    .calendar-day {
        min-height: 64px;
        padding: 6px;
    }
}

.day-sections {
    display: grid;
    gap: 16px;
}

.day-section {
    padding: 12px;
    border: 1px solid #d7dde2;
    border-radius: 6px;
    background: #f7f9fa;
}

.day-section h3 {
    margin: 0 0 8px;
    font-size: 16px;
    color: #1d252c;
}

.section-content {
    min-height: 60px;
}

.empty-state {
    margin: 0;
    color: #9aa6af;
}

.form-field {
    margin-bottom: 12px;
}

.form-field:last-child {
    margin-bottom: 0;
}

.form-field label {
    display: block;
    margin-bottom: 4px;
    font-size: 13px;
    color: #53606b;
}

.form-field input[type="number"],
.form-field textarea {
    width: 100%;
    padding: 6px 8px;
    border: 1px solid #c8d1d8;
    border-radius: 4px;
    background: #ffffff;
    font-size: 13px;
}

.form-field textarea {
    min-height: 60px;
    resize: vertical;
}