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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.screen {
    min-height: 100vh;
}

/* Login Screen */
.login-container {
    max-width: 400px;
    margin: 0 auto;
    padding: 2rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    margin-top: 20vh;
}

.login-container h1 {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 2rem;
}

/* Main Screen */
#main-screen {
    background: #f5f5f5;
}

.header {
    background: #2c3e50;
    color: white;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 1rem;
}

/* Status Cards */
.status-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.status-card {
    background: white;
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.status-icon {
    font-size: 1.5rem;
    display: block;
    margin-bottom: 0.5rem;
}

.status-text {
    font-size: 0.8rem;
    color: #666;
}

/* Punch Section */
.punch-section {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
    text-align: center;
}

.event-type-selector {
    margin-bottom: 1.5rem;
}

.event-type-selector label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.event-type-selector select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.btn-punch {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-punch:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.btn-punch:active {
    transform: scale(0.95);
}

/* Events Section */
.events-section {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.events-section h2 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.event-item {
    padding: 1rem;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.event-item:last-child {
    border-bottom: none;
}

.event-time {
    font-weight: bold;
    color: #667eea;
}

.event-type {
    color: #666;
}

/* Form Elements */
.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #555;
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
}

/* Buttons */
.btn {
    width: 100%;
    padding: 0.75rem;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
}

.btn:hover {
    background: #5568d3;
}

.btn-primary {
    background: #667eea;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    background: rgba(255,255,255,0.2);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 4px;
    color: white;
    cursor: pointer;
}

/* Messages */
.message {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 4px;
    display: none;
}

.message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    display: block;
}

.message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    display: block;
}

.message.warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
    display: block;
}

.error-message {
    margin-top: 1rem;
    color: #721c24;
    display: none;
}

.error-message.show {
    display: block;
}

/* Mobile Responsive */
@media (max-width: 600px) {
    .status-cards {
        grid-template-columns: 1fr;
    }
    
    .btn-punch {
        width: 160px;
        height: 160px;
        font-size: 1.25rem;
    }
}