* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Montserrat', sans-serif;
}

body {
    background-color: #0f0f10;
    color: #eaeaea;
    line-height: 1.5;
    padding: 20px;
}

.container {
    max-width: 980px;
    margin: 0 auto;
}

h1 {
    text-align: center;
    color: #ffffff;
    margin-bottom: 24px;
    font-size: 2rem;
}

.form-container {
    background: #141416;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 14px rgba(0,0,0,0.35);
    margin-bottom: 24px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.input-group { margin-bottom: 4px; }

label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    color: #b8c0cc;
    font-size: 0.9rem;
}

input[type="text"],
input[type="number"],
input[type="datetime-local"],
select {
    width: 100%;
    background: #0f1113;
    color: #eaeaea;
    border: 1px solid #22262b;
    border-radius: 8px;
    padding: 10px 12px;
    font-size: 0.95rem;
    outline: none;
}

input:focus, select:focus {
    border-color: #2ecc71;
    box-shadow: 0 0 0 3px rgba(46, 204, 113, 0.15);
}

button {
    background: #2ecc71;
    color: #0b0b0c;
    border: none;
    padding: 12px 18px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 700;
    transition: transform 0.05s ease, filter 0.2s ease;
    display: block;
    width: 100%;
    margin-top: 12px;
}

button:hover { filter: brightness(1.02); }
button:active { transform: translateY(1px); }
button:disabled { background: #3a3f45; color: #9aa3ad; cursor: not-allowed; }

.receipt-container {
    background: #141416;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 14px rgba(0,0,0,0.35);
}

.receipt {
    max-width: 420px;
    margin: 0 auto 16px;
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid #24282e;
}

.receipt-header {
    background: linear-gradient(180deg, #1db954 0%, #0ea54b 100%);
    padding: 22px 20px 26px;
    text-align: center;
    color: #fff;
}

.app-title { font-weight: 600; opacity: 0.95; font-size: 0.95rem; }
.status-row { margin: 10px 0 8px; display: inline-flex; align-items: center; gap: 8px; }
.status-icon { background: rgba(255,255,255,0.2); border-radius: 999px; width: 26px; height: 26px; display:flex; align-items:center; justify-content:center; font-weight: 700; }
.status-text { font-weight: 700; }
.amount { font-size: 2.1rem; font-weight: 800; letter-spacing: 0.5px; margin-top: 4px; }
.speed-pill { display:inline-block; margin-top: 12px; background:#0f1e12; color:#9df3be; padding:6px 12px; border-radius: 999px; font-size: 0.85rem; border: 1px solid rgba(255,255,255,0.15); }

/* Header variants by status */
.receipt-header.paid { background: linear-gradient(180deg, #18b15a 0%, #0a8f3e 100%); }
.receipt-header.failed { background: linear-gradient(180deg, #e55353 0%, #b41e2d 100%); }
.receipt-header.pending { background: linear-gradient(180deg, #f1b84b 0%, #c17d0b 100%); }
.receipt-header.failed .status-icon { background: rgba(0,0,0,0.2); }
.receipt-header.failed .status-text { color: #ffe6e6; }
.receipt-header.pending .status-text { color: #fff6da; }

.receipt-body { background: #1a1b1e; padding: 16px; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 18px; }
.field .label { color:#9aa3ad; font-size: 0.8rem; margin-bottom: 4px; }
.field .value { color:#e9eef5; font-weight: 600; font-size: 0.98rem; }
.field .value.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace; }

.process { border-top: 1px solid #2a2f36; margin-top: 14px; padding-top: 14px; }
.step { color:#c9d1d9; font-size: 0.95rem; display:flex; align-items:center; gap:8px; margin: 6px 0; }
.step span { display:inline-flex; width:20px; height:20px; background:#153e26; color:#2ecc71; border:1px solid #2ecc71; border-radius: 999px; align-items:center; justify-content:center; font-size: 0.8rem; }

#downloadBtn { max-width: 320px; margin: 0 auto; }

@media (max-width: 768px) {
    .grid-2 { grid-template-columns: 1fr; }
}