/* ==========================================================================
   Nexize Donation Form v2.1 — CSS
   Multi-step, modale, PayPal, Google/Apple Pay, responsive.
   ========================================================================== */

:root {
    --ndon-primary:       #2563eb;
    --ndon-primary-hover: #1d4ed8;
    --ndon-success:       #16a34a;
    --ndon-error:         #dc2626;
    --ndon-bg:            #ffffff;
    --ndon-bg-light:      #f8fafc;
    --ndon-border:        #e2e8f0;
    --ndon-text:          #1e293b;
    --ndon-text-muted:    #64748b;
    --ndon-radius:        12px;
    --ndon-radius-sm:     8px;
    --ndon-shadow:        0 4px 24px rgba(0, 0, 0, 0.12);
    --ndon-font:          -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --ndon-transition:    0.2s ease;
}

/* ---------- Module wrapper ---------- */
.ndon-module {
    font-family: var(--ndon-font);
    max-width: 480px;
    margin: 2rem auto;
    background: var(--ndon-bg);
    border-radius: var(--ndon-radius);
    box-shadow: var(--ndon-shadow);
    padding: 0;
    position: relative;
    overflow: hidden;
    color: var(--ndon-text);
    line-height: 1.5;
}

/* ---------- Steps ---------- */
.ndon-step { padding: 28px 32px 24px; }

/* ---------- Header / Security ---------- */
.ndon-header {
    background: var(--ndon-bg-light);
    border-bottom: 1px solid var(--ndon-border);
    padding: 10px 32px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--ndon-success);
    font-weight: 500;
}
.ndon-lock { font-size: 15px; }
.ndon-header-text { color: var(--ndon-text-muted); }

/* ---------- Title / Intro ---------- */
.ndon-title {
    font-size: 22px;
    font-weight: 700;
    margin: 16px 0 6px;
    color: var(--ndon-text);
}
.ndon-intro {
    font-size: 14px;
    color: var(--ndon-text-muted);
    margin: 0 0 20px;
}
.ndon-step-title {
    font-size: 18px;
    font-weight: 600;
    margin: 8px 0 20px;
}

/* ---------- Frequency toggle ---------- */
.ndon-frequency {
    display: flex;
    background: var(--ndon-bg-light);
    border: 1px solid var(--ndon-border);
    border-radius: var(--ndon-radius-sm);
    overflow: hidden;
    margin-bottom: 20px;
}
.ndon-freq-btn {
    flex: 1;
    padding: 12px 16px;
    border: none;
    background: transparent;
    font-size: 14px;
    font-weight: 600;
    color: var(--ndon-text-muted);
    cursor: pointer;
    transition: all var(--ndon-transition);
    font-family: var(--ndon-font);
}
.ndon-freq-btn.ndon-freq-active {
    background: var(--ndon-primary);
    color: #fff;
    border-radius: var(--ndon-radius-sm);
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}
.ndon-freq-btn:hover:not(.ndon-freq-active) { background: #eef2ff; }

/* ---------- Amount grid ---------- */
.ndon-amounts {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 16px;
}
.ndon-amount-btn {
    padding: 14px 8px;
    border: 2px solid var(--ndon-border);
    border-radius: var(--ndon-radius-sm);
    background: var(--ndon-bg);
    font-size: 16px;
    font-weight: 600;
    color: var(--ndon-text);
    cursor: pointer;
    transition: all var(--ndon-transition);
    font-family: var(--ndon-font);
    text-align: center;
}
.ndon-amount-btn:hover {
    border-color: var(--ndon-primary);
    background: #eef2ff;
}
.ndon-amount-btn.ndon-amount-active {
    border-color: var(--ndon-primary);
    background: var(--ndon-primary);
    color: #fff;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

/* ---------- Custom amount ---------- */
.ndon-custom-amount { margin-bottom: 16px; }
.ndon-custom-wrapper {
    display: flex;
    align-items: center;
    border: 2px solid var(--ndon-border);
    border-radius: var(--ndon-radius-sm);
    overflow: hidden;
    transition: border-color var(--ndon-transition);
}
.ndon-custom-wrapper:focus-within { border-color: var(--ndon-primary); }
#ndon-custom-amount {
    flex: 1;
    border: none;
    padding: 12px 14px;
    font-size: 16px;
    font-family: var(--ndon-font);
    outline: none;
    -moz-appearance: textfield;
    color: var(--ndon-text);
}
#ndon-custom-amount::placeholder { color: var(--ndon-text-muted); }
#ndon-custom-amount::-webkit-outer-spin-button,
#ndon-custom-amount::-webkit-inner-spin-button { -webkit-appearance: none; }
.ndon-currency-label {
    padding: 12px 14px;
    font-size: 16px;
    font-weight: 600;
    color: var(--ndon-text-muted);
    background: var(--ndon-bg-light);
    border-left: 1px solid var(--ndon-border);
}

/* ---------- Fee recovery ---------- */
.ndon-fee-recovery {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 16px;
    background: var(--ndon-bg-light);
    border: 1px solid var(--ndon-border);
    border-radius: var(--ndon-radius-sm);
    margin-bottom: 16px;
    cursor: pointer;
    font-size: 14px;
    transition: border-color var(--ndon-transition);
}
.ndon-fee-recovery:hover { border-color: var(--ndon-primary); }
.ndon-fee-recovery input[type="checkbox"] {
    width: 18px; height: 18px;
    margin-top: 1px;
    accent-color: var(--ndon-primary);
    cursor: pointer;
}
.ndon-fee-text { color: var(--ndon-text-muted); }

/* ---------- Total ---------- */
.ndon-total {
    text-align: center;
    font-size: 16px;
    margin-bottom: 16px;
    color: var(--ndon-text-muted);
}
.ndon-total strong { font-size: 22px; color: var(--ndon-text); }

/* ---------- Payment Request (Google/Apple Pay) ---------- */
.ndon-payment-request {
    margin-bottom: 12px;
}

/* ---------- PayPal container ---------- */
.ndon-paypal-container {
    margin-top: 12px;
    margin-bottom: 12px;
    min-height: 45px;
}

/* ---------- OR separator ---------- */
.ndon-or-separator {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 16px 0;
    color: var(--ndon-text-muted);
    font-size: 13px;
}
.ndon-or-separator::before,
.ndon-or-separator::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--ndon-border);
}

/* ---------- Primary button ---------- */
.ndon-btn-primary {
    display: block;
    width: 100%;
    padding: 16px 24px;
    background: var(--ndon-primary);
    color: #fff;
    border: none;
    border-radius: var(--ndon-radius-sm);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--ndon-transition), box-shadow var(--ndon-transition);
    font-family: var(--ndon-font);
    margin-bottom: 12px;
}
.ndon-btn-primary:hover {
    background: var(--ndon-primary-hover);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}
.ndon-btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.ndon-btn-secondary {
    display: block;
    width: 100%;
    padding: 14px 24px;
    background: transparent;
    color: var(--ndon-text-muted);
    border: 1px solid var(--ndon-border);
    border-radius: var(--ndon-radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--ndon-transition);
    font-family: var(--ndon-font);
}
.ndon-btn-secondary:hover { border-color: var(--ndon-text-muted); color: var(--ndon-text); }

.ndon-btn-stripe { background: #635bff; }
.ndon-btn-stripe:hover { background: #4f46e5; box-shadow: 0 4px 12px rgba(99, 91, 255, 0.3); }

/* ---------- Fiscal note ---------- */
.ndon-fiscal-note {
    font-size: 12px;
    text-align: center;
    color: var(--ndon-text-muted);
    margin: 4px 0 0;
    padding-top: 12px;
    border-top: 1px solid var(--ndon-border);
}

/* ---------- Back button ---------- */
.ndon-back {
    background: none; border: none;
    font-size: 14px; color: var(--ndon-primary);
    cursor: pointer; padding: 0; margin-bottom: 12px;
    font-family: var(--ndon-font); font-weight: 500;
}
.ndon-back:hover { text-decoration: underline; }

/* ---------- Fields ---------- */
.ndon-field { margin-bottom: 14px; }
.ndon-field input,
.ndon-field select {
    width: 100%;
    padding: 12px 14px;
    border: 2px solid var(--ndon-border);
    border-radius: var(--ndon-radius-sm);
    font-size: 15px;
    font-family: var(--ndon-font);
    color: var(--ndon-text);
    transition: border-color var(--ndon-transition);
    box-sizing: border-box;
    background: var(--ndon-bg);
}
.ndon-field input:focus,
.ndon-field select:focus { outline: none; border-color: var(--ndon-primary); }
.ndon-field input.ndon-invalid,
.ndon-field select.ndon-invalid { border-color: var(--ndon-error); }
.ndon-field-error {
    font-size: 12px; color: var(--ndon-error);
    display: none; margin-top: 4px;
}
.ndon-field input.ndon-invalid + .ndon-field-error,
.ndon-field select.ndon-invalid + .ndon-field-error { display: block; }

/* ---------- Optin ---------- */
.ndon-optin {
    display: flex; align-items: flex-start; gap: 10px;
    font-size: 13px; color: var(--ndon-text-muted);
    margin-bottom: 20px; cursor: pointer;
}
.ndon-optin input[type="checkbox"] {
    width: 16px; height: 16px; margin-top: 2px;
    accent-color: var(--ndon-primary);
}

/* ---------- Recap ---------- */
.ndon-recap {
    text-align: center; font-size: 14px; color: var(--ndon-text-muted);
    padding: 12px; background: var(--ndon-bg-light);
    border-radius: var(--ndon-radius-sm); margin-top: 8px;
}
.ndon-recap strong { color: var(--ndon-text); }
.ndon-recap-final { margin-bottom: 20px; }

/* ---------- Security badges ---------- */
.ndon-security-badges {
    display: flex; justify-content: center; gap: 16px;
    font-size: 12px; color: var(--ndon-text-muted);
    margin-top: 8px; padding-top: 12px;
    border-top: 1px solid var(--ndon-border);
}

/* ---------- Error / Loading ---------- */
.ndon-error {
    color: var(--ndon-error); background: #fef2f2;
    border: 1px solid #fecaca; border-radius: var(--ndon-radius-sm);
    padding: 10px 14px; font-size: 14px; text-align: center;
}
.ndon-loading {
    text-align: center; color: var(--ndon-primary);
    font-size: 14px; font-weight: 500;
}

/* ---------- Steps indicator ---------- */
.ndon-steps-indicator {
    display: flex; justify-content: center; gap: 8px;
    padding: 16px; background: var(--ndon-bg-light);
    border-top: 1px solid var(--ndon-border);
}
.ndon-dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--ndon-border);
    transition: all var(--ndon-transition);
}
.ndon-dot-active {
    background: var(--ndon-primary);
    width: 24px; border-radius: 4px;
}

/* ---------- Nudge ---------- */
.ndon-nudge {
    position: absolute; inset: 0;
    background: rgba(255,255,255,0.95);
    display: flex; align-items: center; justify-content: center;
    z-index: 10; backdrop-filter: blur(4px);
}
.ndon-nudge-box { padding: 32px; text-align: center; max-width: 360px; }
.ndon-nudge-box h3 { font-size: 20px; font-weight: 700; margin: 0 0 12px; }
.ndon-nudge-box p { font-size: 15px; color: var(--ndon-text-muted); margin: 0 0 24px; line-height: 1.6; }
.ndon-nudge-actions { display: flex; flex-direction: column; gap: 10px; }

/* ---------- Modal ---------- */
.ndon-modal-overlay {
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 99999;
    display: flex; align-items: center; justify-content: center;
    backdrop-filter: blur(4px);
}
.ndon-modal {
    position: relative; max-width: 520px; width: 95%;
    max-height: 90vh; overflow-y: auto;
    border-radius: var(--ndon-radius);
    animation: ndonFadeIn 0.3s ease;
}
.ndon-modal .ndon-module { margin: 0; box-shadow: none; }
.ndon-modal-close {
    position: absolute; top: 8px; right: 12px; z-index: 10;
    background: none; border: none; font-size: 28px;
    color: var(--ndon-text-muted); cursor: pointer;
    line-height: 1; padding: 4px;
    transition: color var(--ndon-transition);
}
.ndon-modal-close:hover { color: var(--ndon-text); }
@keyframes ndonFadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ---------- Open modal button ---------- */
.ndon-open-modal-btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 12px 28px; background: var(--ndon-primary); color: #fff;
    border: none; border-radius: var(--ndon-radius-sm);
    font-size: 15px; font-weight: 600; cursor: pointer;
    font-family: var(--ndon-font);
    transition: background var(--ndon-transition);
}
.ndon-open-modal-btn:hover { background: var(--ndon-primary-hover); }

/* ---------- A/B badge (admin debug) ---------- */
.ndon-ab-badge {
    position: absolute; top: 8px; left: 12px;
    background: #fbbf24; color: #92400e;
    font-size: 10px; font-weight: 700;
    padding: 2px 8px; border-radius: 4px;
    text-transform: uppercase;
    z-index: 5;
}

/* ---------- Responsive ---------- */
@media (max-width: 540px) {
    .ndon-step { padding: 20px 18px 18px; }
    .ndon-header { padding: 8px 18px; }
    .ndon-amounts { grid-template-columns: repeat(3, 1fr); gap: 8px; }
    .ndon-amount-btn { padding: 12px 4px; font-size: 14px; }
    .ndon-title { font-size: 19px; }
    .ndon-modal { width: 100%; max-width: 100%; max-height: 100vh; border-radius: 0; }
    .ndon-modal .ndon-module { border-radius: 0; }
    .ndon-nudge-box { padding: 24px 18px; }
}