:root {
    --gold: #d4af37;
    --black: #0a0a0a;
    --gray: #1a1a1a;
    --white: #ffffff;
}

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

body {
    background-color: var(--black);
    color: var(--white);
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
}

header {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(rgba(0,0,0,0.8), rgba(0,0,0,0.8));
    border-bottom: 2px solid var(--gold);
}

.logo {
    font-family: 'Bebas Neue', cursive;
    font-size: 4rem;
    color: var(--gold);
    letter-spacing: 4px;
}

.container {
    max-width: 600px;
    margin: 20px auto;
    padding: 20px;
}

h2 {
    font-family: 'Bebas Neue';
    color: var(--gold);
    font-size: 1.8rem;
    margin-bottom: 20px;
    border-left: 4px solid var(--gold);
    padding-left: 15px;
}

.input-group {
    display: flex;
    align-items: center;
    background: var(--gray);
    margin-bottom: 15px;
    padding: 15px;
    border-radius: 10px;
    border: 1px solid #333;
}

.input-group i {
    color: var(--gold);
    margin-right: 15px;
    width: 20px;
    text-align: center;
}

input {
    background: transparent;
    border: none;
    color: white;
    width: 100%;
    font-size: 1rem;
    outline: none;
}

.item-row {
    display: flex;
    gap: 10px;
    margin-bottom: 12px;
}

.item-desc {
    flex: 2;
    background: var(--gray);
    padding: 12px;
    border-radius: 8px;
    border: 1px solid #333;
}

.item-price {
    flex: 1;
    background: var(--gray);
    padding: 12px;
    border-radius: 8px;
    border: 1px solid #333;
    text-align: right;
}

.btn-add-item {
    background: transparent;
    border: 1px dashed var(--gold);
    color: var(--gold);
    padding: 12px;
    width: 100%;
    border-radius: 10px;
    cursor: pointer;
    margin: 10px 0 30px 0;
    font-weight: 600;
}

.total-box-budget {
    background: linear-gradient(145deg, #1a1a1a, #000);
    padding: 30px;
    border-radius: 20px;
    border: 2px solid var(--gold);
    text-align: center;
    margin-bottom: 30px;
}

.total-box-budget span {
    color: var(--gold);
    font-size: 0.9rem;
    text-transform: uppercase;
}

.total-box-budget strong {
    display: block;
    font-size: 3.5rem;
    font-family: 'Bebas Neue';
}

.btn-send-budget {
    width: 100%;
    background: #25d366;
    color: white;
    border: none;
    padding: 20px;
    font-family: 'Bebas Neue';
    font-size: 1.6rem;
    border-radius: 15px;
    cursor: pointer;
    transition: 0.3s;
}

footer {
    text-align: center;
    padding: 40px;
    color: #555;
    font-size: 0.8rem;
}