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

:root {
    --celo: #FCFF52;
    --celo-dim: rgba(252, 255, 82, 0.12);
    --bg: #0b0c0f;
    --surface: #13151a;
    --surface2: #1c1f27;
    --border: rgba(255,255,255,0.07);
    --text: #e8eaf0;
    --muted: #6b7080;
    --success: #4ade80;
    --error: #f87171;
    --font-display: 'Syne', sans-serif;
    --font-mono: 'IBM Plex Mono', monospace;
    --radius: 14px;
}

html, body {
    height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-mono);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Grain overlay */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 0;
    opacity: 0.4;
}

.page {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px 16px 40px;
}

/* Glow blob */
.glow {
    position: fixed;
    top: -120px;
    left: 50%;
    transform: translateX(-50%);
    width: 480px;
    height: 480px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(252,255,82,0.08) 0%, transparent 70%);
    pointer-events: none;
}

.card {
    width: 100%;
    max-width: 420px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 24px 64px rgba(0,0,0,0.5), 0 0 0 1px rgba(252,255,82,0.04);
    animation: rise 0.6s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes rise {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Header */
.card-header {
    padding: 28px 28px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 14px;
}

.avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, #1e2436, #2d3352);
    border: 2px solid var(--celo);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 18px;
    color: var(--celo);
    flex-shrink: 0;
}

.header-text h1 {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    line-height: 1.2;
}

.header-text p {
    font-size: 11px;
    color: var(--muted);
    margin-top: 3px;
    letter-spacing: 0.04em;
}

.celo-badge {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 10px;
    font-family: var(--font-mono);
    color: var(--celo);
    background: var(--celo-dim);
    border: 1px solid rgba(252,255,82,0.2);
    padding: 4px 10px;
    border-radius: 20px;
    letter-spacing: 0.06em;
    white-space: nowrap;
}

.celo-dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--celo);
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* Body */
.card-body {
    padding: 24px 28px;
}

/* Wallet section */
.wallet-section {
    margin-bottom: 24px;
}

.label {
    font-size: 10px;
    letter-spacing: 0.1em;
    color: var(--muted);
    text-transform: uppercase;
    margin-bottom: 8px;
}

.wallet-status {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px 16px;
    min-height: 52px;
}

.wallet-address {
    font-size: 12px;
    color: var(--text);
    font-family: var(--font-mono);
    letter-spacing: 0.02em;
}

.balance-pill {
    background: var(--celo-dim);
    border: 1px solid rgba(252,255,82,0.2);
    color: var(--celo);
    font-size: 12px;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: 20px;
    white-space: nowrap;
}

/* Connect button */
#connectBtn {
    width: 100%;
    padding: 14px;
    background: var(--celo);
    color: #0b0c0f;
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 700;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    letter-spacing: 0.04em;
    transition: opacity 0.15s, transform 0.15s;
}

#connectBtn:hover { opacity: 0.9; transform: translateY(-1px); }
#connectBtn:active { transform: translateY(0); opacity: 0.85; }

/* Minipay note */
.minipay-note {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--celo-dim);
    border: 1px solid rgba(252,255,82,0.15);
    border-radius: 10px;
    padding: 10px 14px;
    font-size: 11px;
    color: var(--celo);
    margin-bottom: 20px;
}

/* Amount selector */
.amount-section { margin-bottom: 20px; }

.preset-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-bottom: 12px;
}

.preset-btn {
    padding: 10px 4px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 12px;
    cursor: pointer;
    text-align: center;
    transition: border-color 0.15s, background 0.15s, color 0.15s;
}

.preset-btn:hover {
    border-color: rgba(252,255,82,0.4);
    background: var(--celo-dim);
    color: var(--celo);
}

.preset-btn.active {
    border-color: var(--celo);
    background: var(--celo-dim);
    color: var(--celo);
}

.custom-input-wrap {
    position: relative;
}

.custom-input-wrap input {
    width: 100%;
    padding: 12px 48px 12px 16px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 14px;
    outline: none;
    transition: border-color 0.15s;
}

.custom-input-wrap input:focus {
    border-color: rgba(252,255,82,0.5);
}

.custom-input-wrap input::placeholder { color: var(--muted); }

.input-currency {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 11px;
    color: var(--celo);
    letter-spacing: 0.06em;
    pointer-events: none;
}

/* Message */
.message-section { margin-bottom: 24px; }

.message-section textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 12px;
    resize: none;
    outline: none;
    transition: border-color 0.15s;
    line-height: 1.5;
}

.message-section textarea:focus { border-color: rgba(252,255,82,0.5); }
.message-section textarea::placeholder { color: var(--muted); }

/* Donate button */
#donateBtn {
    width: 100%;
    padding: 16px;
    background: var(--celo);
    color: #0b0c0f;
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 800;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    letter-spacing: 0.04em;
    transition: opacity 0.15s, transform 0.15s, box-shadow 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

#donateBtn:hover:not(:disabled) {
    opacity: 0.92;
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(252,255,82,0.25);
}

#donateBtn:active:not(:disabled) { transform: translateY(0); }

#donateBtn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Status */
.status-box {
    margin-top: 16px;
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 12px;
    line-height: 1.5;
    display: none;
    animation: fade-in 0.3s ease;
}

@keyframes fade-in {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

.status-box.success {
    background: rgba(74,222,128,0.08);
    border: 1px solid rgba(74,222,128,0.25);
    color: var(--success);
    display: block;
}

.status-box.error {
    background: rgba(248,113,113,0.08);
    border: 1px solid rgba(248,113,113,0.2);
    color: var(--error);
    display: block;
}

.status-box.pending {
    background: var(--celo-dim);
    border: 1px solid rgba(252,255,82,0.2);
    color: var(--celo);
    display: block;
}

.tx-link {
    display: inline-block;
    margin-top: 6px;
    color: var(--celo);
    font-size: 11px;
    text-decoration: none;
    border-bottom: 1px solid rgba(252,255,82,0.4);
}

/* Divider */
.divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 4px 0 20px;
}

/* Footer */
.card-footer {
    padding: 14px 28px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-note {
    font-size: 10px;
    color: var(--muted);
    letter-spacing: 0.04em;
}

.powered-by {
    font-size: 10px;
    color: var(--muted);
    display: flex;
    align-items: center;
    gap: 4px;
}

.powered-by span { color: var(--celo); }

/* Loading spinner */
.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(11,12,15,0.3);
    border-top-color: #0b0c0f;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Not-in-minipay overlay fallback */
.browser-warning {
    background: var(--surface2);
    border: 1px solid rgba(252,255,82,0.15);
    border-radius: var(--radius);
    padding: 16px;
    font-size: 12px;
    color: var(--muted);
    line-height: 1.7;
    margin-bottom: 20px;
    display: none;
}

/* Hidden utility */
.hidden { display: none !important; }

@media (max-width: 360px) {
    .card-header, .card-body { padding-left: 20px; padding-right: 20px; }
    .preset-grid { grid-template-columns: repeat(4, 1fr); gap: 6px; }
}