/* ─────────────────────────────────────────────────────────────
   RD 2FA — OTP Form Styles
   Kế thừa biến màu từ rdtm-login.css (load trước)
   ───────────────────────────────────────────────────────────── */

/* ── Intro block ──────────────────────────────────────────── */
.rd2fa-intro {
    text-align: center;
    color: var(--text-muted, #64748b);
    font-size: 13.5px;
    line-height: 1.7;
    margin-bottom: 20px;
    padding: 14px 16px;
    background: var(--input-bg, #f8fafc);
    border-radius: 10px;
    border: 1px solid var(--border, #e2e8f0);
}

.rd2fa-intro strong {
    display: block;
    color: var(--text-primary, #0f172a);
    font-weight: 600;
    font-size: 14px;
    margin-top: 4px;
}

.rd2fa-expires {
    display: block;
    font-size: 11.5px;
    color: #94a3b8;
    margin-top: 6px;
    letter-spacing: 0.01em;
}

/* ── OTP input — lớn, căn giữa ───────────────────────────── */
#rd2fa_otp {
    text-align: center !important;
    font-size: 30px !important;
    font-weight: 700 !important;
    letter-spacing: 0.3em !important;
    font-family: 'Space Grotesk', 'Courier New', monospace !important;
    padding: 14px 10px !important;
    color: var(--accent-blue, #2563eb) !important;
    height: auto !important;
}

#rd2fa_otp::placeholder {
    color: #d1d5db !important;
    letter-spacing: 0.18em;
    font-size: 22px !important;
}

#rd2fa_otp:focus {
    border-color: var(--accent-line, #3b82f6) !important;
    background: var(--input-focus, #eff6ff) !important;
    box-shadow: 0 0 0 3px var(--accent-glow, rgba(37,99,235,0.18)) !important;
}

/* Submit button — full width như login chính */
#rd2fa-submit {
    display: block;
    width: 100%;
    padding: 12px 24px;
    background: linear-gradient(135deg, #1d4ed8 0%, #2563eb 100%);
    color: #fff !important;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.01em;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.18s ease;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
    box-sizing: border-box;
    text-align: center;
    height: auto;
    line-height: 1.5;
}

#rd2fa-submit:hover {
    background: linear-gradient(135deg, #1e40af 0%, #1d4ed8 100%);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
    transform: translateY(-1px);
}

#rd2fa-submit:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

/* ── Footer links (Gửi lại · Đăng nhập lại) ─────────────── */
.rd2fa-footer-links {
    text-align: center;
    margin: 14px 0 0 !important;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}

.rd2fa-link-btn {
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    color: var(--accent-blue, #2563eb);
    font-size: 13px;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 500;
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color 0.15s;
}

.rd2fa-link-btn:hover {
    color: #1d4ed8;
}

.rd2fa-footer-links a {
    color: rgba(255, 255, 255, 0.4) !important;
    text-decoration: none !important;
    transition: color 0.15s;
}

.rd2fa-footer-links a:hover {
    color: rgba(255, 255, 255, 0.7) !important;
}

/* ── Fade-in animation (kế thừa từ login chính) ──────────── */
#rd2fa-form {
    animation: rdtm-fadein 0.4s ease both;
    animation-delay: 0.06s;
}

/* ── Loading state khi submit ────────────────────────────── */
#rd2fa-submit.loading {
    opacity: 0.7;
    cursor: not-allowed;
    pointer-events: none;
}