/* Base styles for all app screens */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

body {
    background-color: #f8f9fa;
    color: #333;
    height: 100vh;
    overflow: hidden;
}

.app-container {
    position: relative;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Navigation Bar */
.nav-bar {
    background-color: #ffffff;
    height: 60px;
    display: flex;
    align-items: center;
    padding: 0 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: relative;
    z-index: 10;
}

.nav-title {
    font-size: 20px;
    font-weight: 600;
    flex-grow: 1;
    text-align: center;
}

.nav-btn {
    background: none;
    border: none;
    font-size: 22px;
    color: #3498db;
    cursor: pointer;
    padding: 10px;
}

/* Content */
.content {
    flex-grow: 1;
    overflow-y: auto;
    padding: 20px;
    padding-bottom: 80px; /* Space for tab bar */
}

/* Tab Bar */
.tab-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 70px;
    background-color: #ffffff;
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
    z-index: 10;
}

.tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #999;
    padding: 10px;
    text-decoration: none;
    flex: 1;
}

.tab-item.active {
    color: #3498db;
}

.tab-icon {
    font-size: 22px;
    margin-bottom: 4px;
}

.tab-label {
    font-size: 12px;
}

/* Common Components */
.section {
    background-color: #fff;
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 15px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.section-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #333;
}

.list-item {
    padding: 15px 0;
    border-bottom: 1px solid #eee;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.btn {
    padding: 12px 20px;
    border-radius: 8px;
    font-weight: 500;
    font-size: 16px;
    text-align: center;
    cursor: pointer;
    display: inline-block;
    border: none;
}

.btn-primary {
    background-color: #3498db;
    color: white;
}

.btn-secondary {
    background-color: #eee;
    color: #333;
}

.btn-success {
    background-color: #2ecc71;
    color: white;
}

.btn-block {
    display: block;
    width: 100%;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
}

.card {
    background-color: white;
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 15px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
}

.badge {
    background-color: #f44336;
    color: white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: -5px;
    right: -5px;
}

/* Utility Classes */
.text-primary {
    color: #3498db;
}

.text-success {
    color: #2ecc71;
}

.text-danger {
    color: #e74c3c;
}

.text-center {
    text-align: center;
}

.mb-10 {
    margin-bottom: 10px;
}

.mb-20 {
    margin-bottom: 20px;
}

.mt-10 {
    margin-top: 10px;
}

.mt-20 {
    margin-top: 20px;
}

.flex {
    display: flex;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.flex-column {
    display: flex;
    flex-direction: column;
}

/* Animations */
.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(52, 152, 219, 0.7);
    }
    
    70% {
        transform: scale(1);
        box-shadow: 0 0 0 15px rgba(52, 152, 219, 0);
    }
    
    100% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(52, 152, 219, 0);
    }
}