:root {
    --bg-color: #ffffff;
    --text-color: #111111;
    --accent-color: #4f46e5;
    --border-color: #e5e5e5;
    --card-bg: #fafafa;
    --button-bg: #f0f0f0;
    --button-hover: #e0e0e0;
    --error-color: #dc2626;
}

[data-theme="dark"] {
    --bg-color: #0f0f0f;
    --text-color: #f5f5f5;
    --accent-color: #818cf8;
    --border-color: #2a2a2a;
    --card-bg: #1a1a1a;
    --button-bg: #2a2a2a;
    --button-hover: #3a3a3a;
    --error-color: #ef4444;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.2s ease, color 0.2s ease;
}

#app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.view {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.view.hidden {
    display: none;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.settings-btn, .back-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
    padding: 0.5rem;
}

.main {
    flex: 1;
    padding: 1rem;
    max-width: 600px;
    margin: 0 auto;
    width: 100%;
}

.refresh-btn {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    cursor: pointer;
    margin-bottom: 1rem;
    width: 100%;
    max-width: 200px;
}

.refresh-btn:hover {
    opacity: 0.9;
}

.loading, .error {
    text-align: center;
    padding: 2rem;
}

.loading.hidden, .error.hidden {
    display: none;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.error p {
    color: var(--error-color);
}

.error-detail {
    margin-top: 0.5rem;
    color: var(--text-color);
    opacity: 0.85;
    font-size: 0.95rem;
    word-break: break-word;
}

.shifts {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.no-shifts {
    text-align: center;
    padding: 2rem;
    color: var(--text-color);
    font-style: italic;
}

.shift-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1rem;
    transition: border-color 0.2s ease;
}

.shift-card:hover {
    border-color: var(--accent-color);
}

.shift-date {
    font-weight: 600;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

.shift-details {
    font-size: 0.9rem;
}

.settings-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 500;
}

.form-group input {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: border-color 0.2s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-color);
}

.password-container {
    position: relative;
}

.password-container input {
    padding-right: 4rem;
}

.toggle-password {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--accent-color);
    cursor: pointer;
    font-size: 0.9rem;
}

.save-btn {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    cursor: pointer;
    align-self: flex-start;
}

.save-btn:hover {
    opacity: 0.9;
}

.clear-btn {
    background-color: var(--error-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    cursor: pointer;
    margin-bottom: 2rem;
}

.clear-btn:hover {
    opacity: 0.9;
}

.theme-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.theme-toggle label {
    font-weight: 500;
}

.theme-toggle input[type="checkbox"] {
    width: 1.2rem;
    height: 1.2rem;
}

@media (max-width: 480px) {
    .header {
        padding: 0.75rem;
    }

    .header h1 {
        font-size: 1.25rem;
    }

    .main {
        padding: 0.75rem;
    }

    .refresh-btn {
        max-width: none;
    }

    .save-btn, .clear-btn {
        width: 100%;
    }
}