/* ============================================================
 * TUVI REFERRAL — Frontend Styles
 * ============================================================ */

/* SECTION ON /dich-vu/ */
.tuvi-ref-section {
    position: relative;
    margin: 32px 0;
    padding: 32px 28px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    color: #fff;
    overflow: hidden;
}
.tuvi-ref-deco-1 {
    position: absolute; top: -30px; right: -30px;
    width: 120px; height: 120px;
    background: rgba(255,255,255,.08);
    border-radius: 50%;
    pointer-events: none;
}
.tuvi-ref-deco-2 {
    position: absolute; bottom: -20px; left: -20px;
    width: 80px; height: 80px;
    background: rgba(255,255,255,.05);
    border-radius: 50%;
    pointer-events: none;
}
.tuvi-ref-inner {
    position: relative; z-index: 1;
    text-align: center;
    max-width: 580px;
    margin: 0 auto;
}
.tuvi-ref-icon {
    font-size: 2.6em;
    margin-bottom: 8px;
}
.tuvi-ref-title {
    font-size: 1.4em;
    font-weight: 800;
    margin: 0 0 8px;
    font-family: 'Playfair Display', Georgia, serif;
    color: #fff;
    line-height: 1.3;
}
.tuvi-ref-desc {
    opacity: .92;
    font-size: .95em;
    margin: 0 0 20px;
    line-height: 1.55;
}

/* FORM */
.tuvi-ref-form-row {
    display: flex;
    gap: 8px;
    max-width: 480px;
    margin: 0 auto 10px;
    flex-wrap: wrap;
}
.tuvi-ref-input {
    flex: 1;
    min-width: 200px;
    padding: 12px 16px;
    border: none;
    border-radius: 10px;
    font-size: .95em;
    background: rgba(255,255,255,.95);
    color: #333;
    outline: none;
}
.tuvi-ref-input:focus {
    box-shadow: 0 0 0 3px rgba(255,215,0,.4);
}
.tuvi-ref-btn-primary {
    padding: 12px 24px;
    background: #ffd700;
    color: #1a1a2e;
    border: none;
    border-radius: 10px;
    font-weight: 700;
    font-size: .95em;
    cursor: pointer;
    white-space: nowrap;
    transition: transform .15s, box-shadow .15s;
}
.tuvi-ref-btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 14px rgba(255,215,0,.3);
}
.tuvi-ref-btn-primary:disabled {
    opacity: .6;
    cursor: wait;
}
.tuvi-ref-msg {
    margin: 8px 0;
    font-size: .9em;
    min-height: 18px;
}
.tuvi-ref-msg.error { color: #ffcccb; }
.tuvi-ref-msg.success { color: #c8f7c5; }
.tuvi-ref-form-note {
    font-size: .8em;
    opacity: .7;
    margin: 6px 0 0;
}

/* RESULT (link + share + stats) */
.tuvi-ref-link-box {
    background: rgba(255,255,255,.15);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 12px 16px;
    margin: 0 auto 14px;
    max-width: 500px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.tuvi-ref-link-input {
    flex: 1;
    background: transparent;
    border: none;
    color: #fff;
    font-size: .9em;
    font-weight: 600;
    outline: none;
    overflow: hidden;
    text-overflow: ellipsis;
}
.tuvi-ref-copy-btn {
    background: #ffd700;
    color: #1a1a2e;
    border: none;
    border-radius: 8px;
    padding: 8px 16px;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
    font-size: .85em;
}
.tuvi-ref-copy-btn.copied {
    background: #10b981;
    color: #fff;
}

.tuvi-ref-share {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 18px;
    flex-wrap: wrap;
}
.tuvi-ref-share-btn {
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 8px 14px;
    cursor: pointer;
    font-size: .82em;
    font-weight: 600;
    transition: transform .15s;
}
.tuvi-ref-share-btn:hover { transform: translateY(-1px); }
.tuvi-ref-fb { background: #1877f2; }
.tuvi-ref-zalo { background: #0068ff; }
.tuvi-ref-tele { background: #0088cc; }
.tuvi-ref-mes { background: #e91e63; }

.tuvi-ref-stats {
    display: flex;
    justify-content: center;
    gap: 28px;
    margin: 16px 0;
    flex-wrap: wrap;
}
.tuvi-ref-stat-item {
    text-align: center;
}
.tuvi-ref-stat-num {
    font-size: 1.8em;
    font-weight: 800;
    color: #ffd700;
}
.tuvi-ref-stat-label {
    font-size: .75em;
    opacity: .75;
    margin-top: 2px;
}
.tuvi-ref-stat-divider {
    width: 1px;
    background: rgba(255,255,255,.2);
}

.tuvi-ref-switch {
    margin-top: 8px;
    font-size: .85em;
}
.tuvi-ref-switch a {
    color: rgba(255,255,255,.7);
    text-decoration: underline;
}
.tuvi-ref-switch a:hover { color: #ffd700; }

/* HOW IT WORKS */
.tuvi-ref-how {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-top: 22px;
    flex-wrap: wrap;
}
.tuvi-ref-how-step {
    text-align: center;
    max-width: 150px;
}
.tuvi-ref-how-icon {
    font-size: 1.6em;
    margin-bottom: 4px;
}
.tuvi-ref-how-text {
    font-size: .8em;
    opacity: .85;
    line-height: 1.35;
}

/* ============================================================
 * POPUP WELCOME
 * ============================================================ */
.tuvi-ref-popup {
    position: fixed;
    inset: 0;
    z-index: 999999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}
.tuvi-ref-popup-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,.6);
    backdrop-filter: blur(4px);
}
.tuvi-ref-popup-content {
    position: relative;
    background: linear-gradient(135deg, #fff 0%, #fff8e1 100%);
    border-radius: 20px;
    padding: 36px 28px 28px;
    max-width: 420px;
    width: 100%;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0,0,0,.3);
    animation: tuviRefPopIn .35s cubic-bezier(.34,1.56,.64,1);
}
@keyframes tuviRefPopIn {
    from { transform: scale(.85); opacity: 0; }
    to   { transform: scale(1);   opacity: 1; }
}
.tuvi-ref-popup-close {
    position: absolute;
    top: 12px; right: 14px;
    width: 32px; height: 32px;
    background: #f0f0f0;
    border: none;
    border-radius: 50%;
    font-size: 1.4em;
    line-height: 1;
    cursor: pointer;
    color: #666;
    transition: background .15s;
}
.tuvi-ref-popup-close:hover { background: #e0e0e0; }

.tuvi-ref-popup-icon {
    font-size: 3.2em;
    margin-bottom: 4px;
    animation: tuviRefBounce 1.5s ease-in-out infinite;
}
@keyframes tuviRefBounce {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-6px); }
}
.tuvi-ref-popup-title {
    font-size: 1.5em;
    font-weight: 800;
    color: #b8860b;
    margin: 8px 0 12px;
    font-family: 'Playfair Display', Georgia, serif;
}
.tuvi-ref-popup-desc {
    color: #555;
    font-size: .95em;
    line-height: 1.55;
    margin: 0 0 20px;
}
.tuvi-ref-popup-input {
    width: 100%;
    padding: 13px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 1em;
    margin-bottom: 10px;
    box-sizing: border-box;
    outline: none;
    transition: border-color .15s;
}
.tuvi-ref-popup-input:focus {
    border-color: #d4af37;
}
.tuvi-ref-popup-btn {
    display: inline-block;
    width: 100%;
    padding: 13px 16px;
    background: linear-gradient(135deg, #d4af37, #b8860b);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-weight: 700;
    font-size: 1em;
    cursor: pointer;
    text-decoration: none;
    box-sizing: border-box;
    transition: transform .15s, box-shadow .15s;
}
.tuvi-ref-popup-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 14px rgba(212,175,55,.4);
}
.tuvi-ref-popup-btn:disabled {
    opacity: .6;
    cursor: wait;
}
.tuvi-ref-popup-msg {
    margin: 8px 0;
    font-size: .88em;
    min-height: 18px;
}
.tuvi-ref-popup-msg.error { color: #dc2626; }
.tuvi-ref-popup-msg.success { color: #059669; }
.tuvi-ref-popup-note {
    font-size: .8em;
    color: #888;
    margin: 10px 0 0;
}
.tuvi-ref-popup-success-icon {
    font-size: 3em;
    margin-bottom: 4px;
}
.tuvi-ref-popup-success-title {
    color: #b8860b;
    font-size: 1.4em;
    font-weight: 800;
    margin: 4px 0 14px;
    font-family: 'Playfair Display', Georgia, serif;
}

/* Email confirmation row */
.tuvi-ref-popup-email-confirm {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 10px 14px;
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    font-size: .9em;
    text-align: left;
}
.tuvi-ref-popup-email-label {
    color: #888;
    font-size: .88em;
}
#tuvi-ref-popup-sent-email {
    flex: 1;
    color: #333;
    font-weight: 600;
    word-break: break-all;
}
.tuvi-ref-popup-edit-link {
    color: #b8860b;
    text-decoration: underline;
    font-size: .82em;
    white-space: nowrap;
}
.tuvi-ref-popup-edit-link:hover {
    color: #d4af37;
}

/* Tips */
.tuvi-ref-popup-tips {
    background: #fffbeb;
    border-radius: 10px;
    padding: 12px 14px;
    margin-bottom: 16px;
    text-align: left;
}
.tuvi-ref-popup-tip-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: .85em;
    color: #555;
    line-height: 1.4;
    padding: 4px 0;
}
.tuvi-ref-popup-tip-icon {
    font-size: 1em;
    flex-shrink: 0;
}
.tuvi-ref-popup-email-note {
    font-size: .8em;
    color: #888;
    margin: 12px 0 0;
}

/* MOBILE TWEAKS */
@media (max-width: 480px) {
    .tuvi-ref-section { padding: 24px 18px; border-radius: 16px; }
    .tuvi-ref-title { font-size: 1.2em; }
    .tuvi-ref-form-row { flex-direction: column; }
    .tuvi-ref-btn-primary { width: 100%; }
    .tuvi-ref-share-btn { font-size: .78em; padding: 7px 11px; }
    .tuvi-ref-stats { gap: 14px; }
    .tuvi-ref-popup-content { padding: 30px 20px 22px; }
    .tuvi-ref-popup-title { font-size: 1.3em; }
}