:root {
    --color-primary: #1D9E75;
    --color-primary-dark: #168058;
    --color-danger: #D64545;
    --color-text: #1F2933;
    --color-text-muted: #616E7C;
    --color-border: #E4E7EB;
    --color-bg: #F5F7FA;
    --color-surface: #FFFFFF;
    --radius: 10px;
    --spacing: 1rem;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
}

.hidden {
    display: none;
}

#app {
    max-width: 480px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Offline banner */
.offline-banner {
    background: var(--color-danger);
    color: #fff;
    text-align: center;
    padding: 0.5rem var(--spacing);
    font-size: 0.875rem;
}

/* Screens */
.screen {
    flex: 1;
    padding: var(--spacing);
}

/* Login form */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-width: 320px;
    margin: 3rem auto 0;
}

.login-form h1 {
    text-align: center;
    margin-bottom: 0.5rem;
    color: var(--color-primary);
}

.login-form label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

.login-form input[type="email"],
.login-form input[type="password"] {
    width: 100%;
    padding: 0.75rem;
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
}

.login-form input:focus {
    outline: 2px solid var(--color-primary);
    border-color: var(--color-primary);
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: normal;
}

.checkbox input {
    width: auto;
}

.error {
    color: var(--color-danger);
    font-size: 0.875rem;
    margin: 0;
}

/* App header */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing);
}

.app-header h1 {
    color: var(--color-primary);
    margin: 0;
    font-size: 1.5rem;
}

/* Cards */
.status-card,
.location-card {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: var(--spacing);
    margin-bottom: var(--spacing);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.status-card p,
.location-card p {
    margin: 0.25rem 0;
}

#clock-status {
    font-size: 1.25rem;
    font-weight: 600;
}

#shift-duration {
    color: var(--color-text-muted);
}

.location-card {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* Buttons & links */
.primary-button {
    width: 100%;
    padding: 0.875rem;
    font-size: 1.125rem;
    font-weight: 600;
    color: #fff;
    background: var(--color-primary);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
}

.primary-button:active {
    background: var(--color-primary-dark);
}

.primary-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.login-form button[type="submit"] {
    padding: 0.875rem;
    font-size: 1.125rem;
    font-weight: 600;
    color: #fff;
    background: var(--color-primary);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    margin-top: 0.5rem;
}

.link-button {
    background: none;
    border: none;
    color: var(--color-primary);
    font-size: 0.875rem;
    cursor: pointer;
    padding: 0;
}

.link {
    display: block;
    text-align: center;
    margin-top: var(--spacing);
    color: var(--color-primary);
    text-decoration: none;
    font-size: 0.875rem;
}

/* Shift history */
.shift-card {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 0.75rem var(--spacing);
    margin-bottom: 0.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.shift-card p {
    margin: 0.125rem 0;
}

.shift-date {
    font-weight: 600;
}

.shift-time,
.shift-meta {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.muted {
    color: var(--color-text-muted);
    text-align: center;
}

.pagination-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: var(--spacing);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.pagination-controls .link-button:disabled {
    color: var(--color-border);
    cursor: not-allowed;
}

.pagination-controls.hidden {
    display: none;
}