body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--background-color);
    color: var(--text-primary);
    -webkit-tap-highlight-color: transparent;
}

.app-container {
    max-width: 100%;
    min-height: 100vh;
    padding-bottom: 60px;
    /* Space for bottom nav */
    position: relative;
}

/* Buttons */
.btn {
    display: block;
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: transform 0.1s;
    box-sizing: border-box;
    text-decoration: none;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--secondary-color);
}

.btn-secondary {
    background-color: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid #ddd;
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: 14px;
    color: var(--text-secondary);
}

.form-input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: var(--radius-md);
    font-size: 16px;
    background-color: var(--surface-color);
    color: var(--text-primary);
    box-sizing: border-box;
}

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

/* Auth Screens */
.auth-container {
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 80vh;
}

.auth-title {
    font-size: 28px;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.auth-links {
    margin-top: var(--spacing-lg);
    text-align: center;
    font-size: 14px;
}

.auth-links a {
    color: var(--primary-dark);
    text-decoration: none;
}

/* Bottom Nav */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background-color: var(--surface-color);
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 12px;
}

.nav-item.active {
    color: var(--primary-dark);
}

.nav-item i {
    font-size: 20px;
    margin-bottom: 4px;
}