/* ============================================================
   BUALO AI — BUY CREDITS PAGE
   Mobile-first, consistent with style.css variables
   ============================================================ */

.buy-body {
    background: var(--blue-light);
    min-height: 100vh;
}

.buy-shell {
    width: 92%;
    max-width: 620px;
    margin: 0 auto;
    padding: 24px 0 40px;
}

/* ---------- Lang toggle ---------- */
.lang-switch {
    font-weight: 700;
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    padding: 6px 14px;
    border-radius: 20px;
    border: 2px solid var(--blue-primary);
    color: var(--blue-primary);
    text-decoration: none;
    transition: all 0.18s;
}
.lang-switch:hover { background: var(--blue-primary); color: var(--white); }

/* ---------- Hero ---------- */
.buy-hero { text-align: center; padding: 18px 0 14px; }
.buy-badge {
    display: inline-block;
    background: var(--blue-primary);
    color: var(--white);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 10px;
}
.buy-title {
    font-size: clamp(1.4rem, 4.5vw, 1.85rem);
    font-weight: 800;
    color: var(--text-dark);
    line-height: 1.15;
    margin-bottom: 8px;
}
.buy-title .highlight { color: var(--blue-primary); }
.buy-subtitle {
    font-size: 0.88rem;
    color: var(--text-grey);
    max-width: 360px;
    margin: 0 auto;
}

/* ---------- Trust badges ---------- */
.trust-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-bottom: 14px;
}
.trust-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-grey);
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 5px 10px;
}
.trust-item i { color: var(--blue-primary); }

/* ---------- Status banner ---------- */
.status-banner {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    font-weight: 500;
    margin-bottom: 16px;
    display: none;
}
.status-banner.visible { display: block; }
.status-banner.error   { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }
.status-banner.info    { background: #eff6ff; color: #1d4ed8; border: 1px solid #bfdbfe; }

/* ---------- Pack grid ---------- */
.pack-section { margin-bottom: 14px; }
.pack-section-label {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-grey);
    margin-bottom: 10px;
}
.pack-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}
.pack-card {
    position: relative;
    background: var(--white);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    padding: 16px 10px 14px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.18s, box-shadow 0.18s, transform 0.12s;
    user-select: none;
}
.pack-card:hover { border-color: var(--blue-primary); box-shadow: var(--shadow-sm); }
.pack-card.selected {
    border-color: var(--blue-primary);
    background: linear-gradient(145deg, #eef3ff 0%, #f5f8ff 100%);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.pack-card input[type="radio"] { position: absolute; opacity: 0; width: 0; height: 0; }
.pack-popular-badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--yellow);
    color: var(--text-dark);
    font-size: 0.65rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 3px 10px;
    border-radius: 12px;
    white-space: nowrap;
}
.pack-discount-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: #dc2626;
    color: var(--white);
    font-size: 0.66rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    padding: 4px 8px;
    border-radius: 999px;
    box-shadow: 0 8px 18px rgba(220, 38, 38, 0.18);
}
.pack-credits { font-size: 1.6rem; font-weight: 800; color: var(--blue-primary); line-height: 1; margin-bottom: 3px; }
.pack-credits-label { font-size: 0.7rem; color: var(--text-grey); margin-bottom: 6px; }
.pack-price-compare {
    margin-bottom: 4px;
    min-height: 18px;
}
.pack-price-original {
    display: inline-block;
    font-size: 0.76rem;
    color: #94a3b8;
    text-decoration: line-through;
    text-decoration-thickness: 2px;
}
.pack-price { font-size: 0.86rem; font-weight: 700; color: var(--text-dark); }

.field-error {
    font-size: 0.74rem;
    color: #ef4444;
    margin-top: 4px;
    display: none;
}
.field-error.visible { display: block; }

/* ---------- Form card ---------- */
.buy-form-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 16px 16px;
    margin-bottom: 12px;
    border: 1px solid rgba(37, 99, 235, 0.08);
}
.buy-form-title {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
}
.field-hint {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 0.72rem;
    color: var(--text-grey);
    margin-top: 6px;
    line-height: 1.35;
}
.field-hint i {
    color: var(--blue-primary);
    margin-top: 2px;
}
.redirect-status {
    margin-top: 10px;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    color: #1d4ed8;
    font-size: 0.8rem;
    font-weight: 600;
    text-align: center;
}

/* ---------- Pay button ---------- */
.btn-pay {
    width: 100%;
    padding: 15px;
    background: var(--blue-primary);
    color: var(--white);
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: 18px;
    transition: background 0.18s, transform 0.1s, opacity 0.18s;
}
.btn-pay:hover:not(:disabled) { background: var(--blue-dark); transform: translateY(-1px); }
.btn-pay:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.btn-pay .spinner-sm {
    width: 18px; height: 18px;
    border: 2.5px solid rgba(255,255,255,0.4);
    border-top-color: var(--white);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    display: none;
}
.btn-pay.loading .spinner-sm { display: block; }
@keyframes spin { to { transform: rotate(360deg); } }

.pack-grid.loading {
    pointer-events: none;
}
.pack-grid.loading .pack-card {
    opacity: 0.7;
}

/* ---------- How it works ---------- */
.how-it-works {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 14px 16px;
    margin-bottom: 16px;
}
.how-it-works h3 {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
    text-align: center;
}
.how-steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}
.how-step {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #f8faff;
    border: 1px solid rgba(37, 99, 235, 0.08);
    border-radius: 14px;
    padding: 9px 10px;
}
.how-step-num {
    flex-shrink: 0;
    width: 22px; height: 22px;
    background: var(--blue-primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.68rem;
    font-weight: 800;
}
.how-step-text { font-size: 0.74rem; color: var(--text-grey); line-height: 1.3; }

/* ============================================================
   CALLBACK PAGE
   ============================================================ */
.callback-shell {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 40px;
}
.callback-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: 32px 24px 28px;
    text-align: center;
    width: 100%;
}
.callback-icon { margin-bottom: 14px; }
.success-icon i { font-size: 3rem; color: var(--green); }
.callback-heading { font-size: 1.5rem; font-weight: 800; color: var(--text-dark); margin-bottom: 8px; }
.callback-desc { font-size: 0.9rem; color: var(--text-grey); margin-bottom: 20px; line-height: 1.6; }

.code-area { margin-bottom: 18px; }
.code-label { font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-grey); margin-bottom: 7px; }
.code-box {
    display: flex; align-items: center; justify-content: center; gap: 12px;
    background: var(--blue-light); border: 2px solid var(--blue-primary);
    border-radius: var(--radius-md); padding: 13px 16px; margin-bottom: 7px;
}
.code-value { font-family: 'Courier New', monospace; font-size: 1.85rem; font-weight: 800; color: var(--blue-primary); letter-spacing: 0.12em; }
.copy-btn {
    background: var(--blue-primary); color: var(--white); border: none;
    border-radius: var(--radius-sm); padding: 8px 13px;
    font-family: 'Poppins', sans-serif; font-size: 0.8rem; font-weight: 600;
    cursor: pointer; display: flex; align-items: center; gap: 5px;
    white-space: nowrap; transition: background 0.15s;
}
.copy-btn:hover { background: var(--blue-dark); }
.credits-line { font-size: 0.83rem; color: var(--green); font-weight: 600; margin-bottom: 3px; }
.sms-note { font-size: 0.78rem; color: var(--text-grey); }
.sms-note i { color: var(--blue-primary); margin-right: 4px; }

.checking-area { display: flex; flex-direction: column; align-items: center; gap: 9px; padding: 14px 0; color: var(--text-grey); font-size: 0.88rem; }
.spinner { width: 30px; height: 30px; border: 3px solid var(--border); border-top-color: var(--blue-primary); border-radius: 50%; animation: spin 0.8s linear infinite; }
.timeout-area { padding: 12px 0; }
.timeout-msg { font-size: 0.9rem; color: var(--text-grey); background: #fffbeb; border: 1px solid #fde68a; border-radius: var(--radius-sm); padding: 11px 14px; display: flex; align-items: flex-start; gap: 9px; text-align: left; }
.timeout-msg i { color: var(--yellow-dark); margin-top: 2px; }

.how-box { background: #f8faff; border-radius: var(--radius-md); padding: 16px; margin: 18px 0; text-align: left; }
.how-title { font-size: 0.88rem; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; }
.how-steps { padding-left: 18px; color: var(--text-grey); font-size: 0.85rem; line-height: 1.8; }
.field-label {
    display: block;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
}
.field-input {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 13px 14px;
    font-family: 'Poppins', sans-serif;
    font-size: 0.95rem;
    color: var(--text-dark);
    background: var(--white);
}
.field-input:focus {
    outline: none;
    border-color: var(--blue-primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.callback-actions { display: flex; flex-direction: column; gap: 9px; margin-top: 20px; }
.btn-buy { display: block; width: 100%; padding: 13px; border-radius: var(--radius-md); font-family: 'Poppins', sans-serif; font-size: 0.93rem; font-weight: 700; text-align: center; text-decoration: none; transition: all 0.18s; cursor: pointer; }
.btn-buy.btn-secondary { background: var(--blue-primary); color: var(--white); }
.btn-buy.btn-secondary:hover { background: var(--blue-dark); }
.btn-buy.btn-ghost-sm { background: transparent; color: var(--text-grey); border: 1.5px solid var(--border); }
.btn-buy.btn-ghost-sm:hover { border-color: var(--blue-primary); color: var(--blue-primary); }

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
    .buy-shell {
        width: min(100% - 24px, 640px);
        padding: 14px 0 24px;
    }

    .buy-hero {
        padding: 10px 0 10px;
    }

    .buy-title {
        font-size: clamp(1.3rem, 5.5vw, 1.65rem);
    }

    .buy-subtitle {
        max-width: none;
        font-size: 0.84rem;
    }

    .pack-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .pack-card {
        padding: 16px 16px 14px;
        text-align: left;
        display: grid;
        grid-template-columns: auto 1fr auto;
        gap: 8px 14px;
        align-items: center;
    }

    .pack-popular-badge {
        position: static;
        transform: none;
        justify-self: start;
        margin-bottom: 2px;
    }

    .pack-discount-badge {
        position: static;
        justify-self: end;
        align-self: start;
        margin-left: auto;
        box-shadow: none;
    }

    .pack-credits {
        grid-column: 1;
        grid-row: 1 / span 2;
        font-size: 1.45rem;
        min-width: 56px;
    }

    .pack-credits-label {
        grid-column: 2;
        grid-row: 1;
        margin: 0;
        font-size: 0.78rem;
    }

    .pack-price {
        grid-column: 3;
        grid-row: 2;
        font-size: 0.95rem;
        text-align: right;
        white-space: nowrap;
    }

    .pack-price-compare {
        grid-column: 3;
        grid-row: 1;
        text-align: right;
        margin: 0;
        min-height: auto;
    }

    .buy-form-card,
    .how-it-works {
        padding: 14px 14px;
        border-radius: 20px;
    }

    .how-steps-grid {
        grid-template-columns: 1fr;
        gap: 8px;
    }

}

@media (max-width: 560px) {
    .main-header {
        position: static;
    }

    .header-inner {
        width: min(100% - 20px, 640px);
        align-items: flex-start;
        gap: 12px;
        padding: 8px 0;
    }

    .brand-logo span {
        font-size: 1rem;
    }

    .header-cta {
        justify-content: flex-end;
        gap: 8px;
    }

    .btn-header {
        padding: 6px 10px;
        font-size: 0.72rem;
    }

    .header-cta .btn-android,
    .header-cta .btn-ios {
        display: none;
    }

    .buy-shell {
        width: min(100% - 16px, 640px);
        padding-top: 8px;
    }

    .buy-badge,
    .buy-subtitle,
    .field-hint {
        display: none;
    }

    .trust-row {
        justify-content: stretch;
        gap: 6px;
    }

    .trust-item {
        width: 100%;
        justify-content: center;
        text-align: center;
        border-radius: 14px;
        padding: 7px 10px;
    }

    .trust-item:last-child {
        display: none;
    }

    .pack-section-label {
        margin-bottom: 8px;
    }

    .pack-grid {
        gap: 8px;
    }

    .buy-form-title {
        margin-bottom: 0;
    }

    .redirect-status {
        margin-top: 8px;
    }

    .how-it-works h3 {
        display: none;
    }

}

@media (max-width: 400px) {
    .buy-shell {
        width: calc(100% - 12px);
    }

    .buy-form-card,
    .how-it-works {
        padding: 12px 12px;
    }

    .pack-grid { gap: 8px; }
    .pack-card {
        grid-template-columns: 48px 1fr;
        padding: 14px 12px 12px;
    }
    .pack-credits { font-size: 1.3rem; min-width: 48px; }
    .pack-price {
        grid-column: 2;
        grid-row: 3;
        text-align: left;
        font-size: 0.82rem;
    }
    .pack-price-compare {
        grid-column: 2;
        grid-row: 2;
        text-align: left;
        margin: 0;
    }
    .pack-discount-badge {
        grid-column: 2;
        grid-row: 1;
        justify-self: start;
    }
    .code-value { font-size: 1.5rem; }
    .code-box { flex-direction: column; }
}