:root {
    --background-color: #000000;
    --text-color: #FFFFFF;
    --border-color: #FFFFFF;
}

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

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    overflow: hidden;
}

.app-header {
    text-align: center;
    padding: 20px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--background-color);
    z-index: 10;
}

#app-main {
    padding: 80px 15px 100px 15px;
    height: 100vh;
    overflow-y: auto;
}

.view {
    display: none;
}

.view.active {
    display: block;
}

/* Nav Bar */
.nav-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 80px;
    background-color: var(--background-color);
    display: flex;
    justify-content: space-around;
    align-items: center;
    border-top: 1px solid var(--border-color);
}

.nav-button, .nav-button-add {
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
}

.nav-icon {
    width: 28px;
    height: 28px;
}

.nav-button-add {
    width: 70px;
    height: 70px;
    background-color: var(--background-color);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 25px;
}

.nav-icon-add {
    width: 32px;
    height: 32px;
}

/* Common UI */
h2 {
    margin-bottom: 20px;
    font-weight: normal;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.list-item {
    display: flex;
    align-items: center;
    padding: 15px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.list-item-icon {
    width: 24px;
    height: 24px;
    margin-right: 15px;
}

.list-item-content {
    flex-grow: 1;
}

.list-item-title {
    font-size: 1rem;
}

.list-item-subtitle {
    font-size: 0.8rem;
    opacity: 0.7;
}

.list-item-amount {
    font-size: 1.2rem;
    font-weight: bold;
}

/* Progress Bar */
.progress-bar-container {
    width: 100%;
    height: 6px;
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 5px;
}

.progress-bar {
    height: 100%;
    background-color: var(--border-color);
    border-radius: 3px;
    width: 0; /* Set by JS */
}

/* Modal */
.modal-container-hidden {
    display: none;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
}

.modal-content {
    background-color: var(--background-color);
    padding: 20px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    width: 90%;
    max-width: 400px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-close-btn {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 24px;
    cursor: pointer;
}

/* Forms */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    opacity: 0.8;
}

.form-input {
    width: 100%;
    padding: 12px;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    color: var(--text-color);
    font-size: 1rem;
}

.category-picker-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: 15px;
}

.category-picker-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px;
    border: 1px solid transparent;
    border-radius: 5px;
    cursor: pointer;
}

.category-picker-item.selected {
    border-color: var(--border-color);
}

.category-picker-icon {
    width: 28px;
    height: 28px;
    margin-bottom: 5px;
}

.btn {
    width: 100%;
    padding: 15px;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    font-size: 1rem;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 10px;
}