/* ========================================
   KN Thu Cũ Đổi Mới – Frontend Wizard CSS
   ======================================== */

:root {
    --kn-primary:    #F0B91F;
    --kn-primary-dk: #c0392b;
    --kn-dark:       #2c3e50;
    --kn-gray:       #7f8c8d;
    --kn-light:      #f5f6fa;
    --kn-border:     #dfe6e9;
    --kn-success:    #040404;
    --kn-warning:    #f39c12;
    --kn-radius:     12px;
    --kn-shadow:     0 4px 24px rgba(0,0,0,.10);
    --kn-trans:      .25s ease;
}

/* ---- MEDIA LAYOUT ---- */
.kn-wizard-outer {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin: 32px auto;
    max-width: 1200px;
}

.kn-media-panel {
    width: 260px;
    flex-shrink: 0;
    position: sticky;
    top: 140px;
}

.kn-media-left img {
    width: 100%;
    border-radius: 12px;
    object-fit: cover;
    box-shadow: 0 4px 16px rgba(0,0,0,.12);
    display: block;
}

.kn-video-wrap iframe {
    width: 100%;
    aspect-ratio: 1 / 1;
    border-radius: 12px;
    border: none;
    display: block;
    box-shadow: 0 4px 16px rgba(0,0,0,.12);
}

.kn-wizard {
    --kn-primary: #e84c3d; /* overridden by inline style */
    --kn-primary-dk: color-mix(in srgb, var(--kn-primary) 80%, #000 20%);
    max-width: 740px;
    width: 100%;
    min-width: 0;
    margin: 0 auto;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--kn-dark);
}

/* ---- PROGRESS ---- */
.kn-progress {
    margin-bottom: 28px;
}

.kn-steps-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: nowrap;
    gap: 0;
    margin-bottom: 10px;
}

.kn-step-dot {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    min-width: 52px;
    opacity: .4;
    transition: opacity var(--kn-trans);
}

.kn-step-dot.active  { opacity: 1; }
.kn-step-dot.done    { opacity: .75; cursor: pointer; }
.kn-step-dot.done:hover .kn-dot-num { transform: scale(1.1); }

.kn-dot-num {
    width: 32px; height: 32px;
    border-radius: 50%;
    background: var(--kn-border);
    border: 2px solid var(--kn-border);
    display: flex; align-items: center; justify-content: center;
    font-size: 13px; font-weight: 700;
    transition: all var(--kn-trans);
    color: var(--kn-gray);
}

.kn-step-dot.active .kn-dot-num {
    background: var(--kn-primary);
    border-color: var(--kn-primary);
    color: #fff;
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--kn-primary) 20%, transparent 80%);
}

.kn-step-dot.done .kn-dot-num {
    background: var(--kn-success);
    border-color: var(--kn-success);
    color: #fff;
}
.kn-step-dot.done .kn-dot-num::before { content: '✓'; }

.kn-dot-label {
    font-size: 10px;
    color: var(--kn-gray);
    white-space: nowrap;
    text-align: center;
}
.kn-step-dot.active .kn-dot-label { color: var(--kn-primary); font-weight: 600; }

.kn-step-line {
    flex: 1;
    height: 2px;
    background: var(--kn-border);
    margin-bottom: 18px;
    min-width: 12px;
}

.kn-progress-bar-wrap {
    height: 4px;
    background: var(--kn-border);
    border-radius: 2px;
    overflow: hidden;
}
.kn-progress-fill {
    height: 100%;
    background: var(--kn-primary);
    border-radius: 2px;
    transition: width .4s ease;
}

/* ---- PANELS ---- */
.kn-step-panel {
    display: none;
    animation: knFadeIn .3s ease;
}
.kn-step-panel.active { display: block; }

@keyframes knFadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}

.kn-step-inner {
    background: #fff;
    border-radius: var(--kn-radius);
    box-shadow: var(--kn-shadow);
    padding: 28px 32px;
}

.kn-step-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 0 0 6px;
    color: var(--kn-dark);
}
.kn-step-sub {
    color: var(--kn-gray);
    margin: 0 0 20px;
    font-size: .95rem;
}

/* ---- STEP 1: BRANDS ---- */
.kn-brands-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 12px;
}

.kn-brand-btn {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border: 1px solid var(--kn-border);
    border-radius: 10px;
    background: #fff;
    cursor: pointer;
    font-size: .9rem;
    font-weight: 600;
    color: var(--kn-dark);
    transition: all var(--kn-trans);
    min-height: 55px;
    text-align: left;
}
.kn-brand-btn:not(:has(img)) {
    justify-content: center;
    text-align: center;
}
.kn-brand-btn:hover,
.kn-brand-btn.selected {
    border-color: var(--kn-primary);
    background: color-mix(in srgb, var(--kn-primary) 6%, #fff 94%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,.1);
}
.kn-brand-btn.selected {
    border-width: 2px;
    color: var(--kn-primary);
}
.kn-brand-btn img {
    max-height: 36px;
    max-width: 52px;
    object-fit: contain;
    flex-shrink: 0;
}

/* ---- STEP 2: MODELS ---- */
.kn-search-wrap { margin-bottom: 14px; }
.kn-search-input {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    border: 2px solid var(--kn-border);
    border-radius: 8px;
    outline: none;
    box-sizing: border-box;
    transition: border-color var(--kn-trans);
}
.kn-search-input:focus { border-color: var(--kn-primary); }

.kn-models-list {
    max-height: 340px;
    overflow-y: auto;
    border: 1px solid var(--kn-border);
    border-radius: 8px;
}
.kn-model-item {
    padding: 12px 16px;
    cursor: pointer;
    border-bottom: 1px solid var(--kn-border);
    font-size: .95rem;
    transition: background var(--kn-trans);
}
.kn-model-item:last-child { border-bottom: none; }
.kn-model-item:hover { background: var(--kn-light); }
.kn-model-item.selected {
    background: color-mix(in srgb, var(--kn-primary) 8%, #fff 92%);
    color: var(--kn-primary);
    font-weight: 600;
    border-left: 3px solid var(--kn-primary);
}
.kn-model-item.hidden { display: none; }

/* ---- STEP 3: VARIANTS ---- */
.kn-variants-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 10px;
    margin: 8px 0 20px;
}
.kn-variant-btn {
      padding: 0px 16px;
    border: 1px solid var(--kn-border);
    border-radius: 8px;
    background: #fff;
    cursor: pointer;
    font-size: .9rem;
    font-weight: 600;
    color: var(--kn-dark);
    transition: all var(--kn-trans);
    text-align: center;
    width: 100%;
    word-break: break-word;
    line-height: 30px;
}
.kn-variant-btn:hover, .kn-variant-btn.selected {
    border-color: var(--kn-primary);
    background: color-mix(in srgb, var(--kn-primary) 8%, #fff 92%);
    color: var(--kn-primary);
}
.kn-variant-price {
    display: block;
    font-size: .75rem;
    font-weight: 400;
    color: var(--kn-gray);
    margin-top: 2px;
}

/* ---- STEP 4: CRITERIA ---- */
.kn-crit-group {
    margin-bottom: 24px;
}
.kn-crit-group-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--kn-primary);
    padding: 8px 0;
    border-bottom: 2px solid var(--kn-primary);
    margin-bottom: 14px;
}
.kn-crit-item {
    margin-bottom: 16px;
    padding: 14px 16px;
    background: var(--kn-light);
    border-radius: 8px;
    transition: border 0.2s;
    border: 2px solid transparent;
}
@keyframes kn-flash-unanswered {
    0%, 100% { border-color: transparent; background: var(--kn-light); }
    40%       { border-color: #e74c3c; background: #fff3f2; }
}
.kn-unanswered-flash {
    animation: kn-flash-unanswered 1.2s ease;
}
.kn-crit-question {
    font-size: .95rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--kn-dark);
}
.kn-crit-help {
    font-size: .8rem;
    color: var(--kn-gray);
    margin-bottom: 8px;
    font-style: italic;
}
.kn-crit-options {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.kn-option-btn {
    padding: 8px 16px;
    border: 1px solid var(--kn-border);
    border-radius: 6px;
    background: #fff;
    cursor: pointer;
    font-size: .85rem;
    color: var(--kn-dark);
    transition: all var(--kn-trans);
    line-height: 1.3;
}
.kn-option-btn:hover {
    border-color: var(--kn-primary);
}
.kn-option-btn.selected {
    border-color: var(--kn-primary);
    background: var(--kn-primary);
    color: #fff;
}
.kn-option-btn.no-buy-opt.selected {
    background: #c0392b;
    border-color: #c0392b;
}

.kn-criteria-footer {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-top: 20px;
    flex-wrap: wrap;
}

.kn-crit-progress {
    font-size: .85rem;
    color: var(--kn-gray);
    margin-left: auto;
}

/* ---- STEP 5: RESULT ---- */
.kn-result-card {
    background: var(--kn-light);
    border-radius: 10px;
    padding: 24px;
    margin-bottom: 20px;
}
.kn-result-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}
.kn-result-device {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--kn-dark);
}
.kn-cond-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: .8rem;
    font-weight: 700;
    letter-spacing: .5px;
}
.kn-cond-badge.moi    { background: #d5f5e3; color: #1e8449; }
.kn-cond-badge.tot    { background: #d6eaf8; color: #1a5276; }
.kn-cond-badge.kha    { background: #fef9e7; color: #9a7d0a; }
.kn-cond-badge.con    { background: #fdebd0; color: #935116; }
.kn-cond-badge.khong-thu { background: #fadbd8; color: #922b21; }

.kn-price-breakdown {
    border-top: 1px solid var(--kn-border);
    padding-top: 14px;
}
.kn-price-row {
    display: flex;
    justify-content: space-between;
    font-size: .9rem;
    padding: 4px 0;
    color: var(--kn-gray);
}
.kn-price-row .val { font-weight: 600; color: var(--kn-dark); }
.kn-price-row .val.deduct { color: #c0392b; }
.kn-price-divider {
    border: none;
    border-top: 2px solid var(--kn-border);
    margin: 10px 0;
}
.kn-price-main {
    text-align: center;
    padding: 16px 0 8px;
}
.kn-price-label { font-size: .9rem; color: var(--kn-gray); font-weight: 600; text-transform: uppercase; letter-spacing: .5px; }
.kn-price-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--kn-primary);
    margin: 6px 0;
    line-height: 1.1;
}
.kn-price-sub { font-size: .8rem; color: var(--kn-gray); }
.kn-disclaimer {
    margin-top: 14px;
    padding: 10px 14px;
    background: #fff9e6;
 
    border-radius: 4px;
    font-size: .82rem;
    color: #856404;
}
.kn-no-buy-msg {
    text-align: center;
    padding: 20px;
    background: #fadbd8;
    border-radius: 10px;
    color: #922b21;
    font-weight: 700;
    font-size: 1.1rem;
}

.kn-result-footer {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    justify-content: center !important;
    margin-top: 8px;
    width: 100%;
}
.kn-btn-call {
    background: #e84c3d !important;
    border-color: #e84c3d !important;
    text-decoration: none;
}
.kn-btn-call:hover {
    background: #c0392b;
    border-color: #c0392b;
    color: white !important;
}
.kn-btn-book {
    background: var(--kn-dark);
    border-color: var(--kn-dark);
}
.kn-btn-book:hover {
    background: #1a252f;
    border-color: #1a252f;
}

/* ---- STEP 6: FORM ---- */
.kn-contact-form { margin-top: 8px; }
.kn-form-row {
    margin-bottom: 16px;
}
.kn-form-row label {
    display: block;
    font-size: .9rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--kn-dark);
}
.kn-required { color: var(--kn-primary); }
.kn-contact-form input[type=text],
.kn-contact-form input[type=tel],
.kn-contact-form input[type=datetime-local],
.kn-contact-form select {
    width: 100%;
    padding: 11px 14px;
     border: 1px solid #cdcdcd;
    border-radius: 8px;
    font-size: .95rem;
    box-sizing: border-box;
    transition: border-color var(--kn-trans);
    background: #fff;
    font-family: inherit;
        min-height: 47px;

}
.kn-contact-form textarea {
       width: 100%;
    padding: 11px 14px;
     border: 1px solid #cdcdcd;
    border-radius: 8px;
    font-size: .95rem;
    box-sizing: border-box;
    transition: border-color var(--kn-trans);
    background: #fff;
    font-family: inherit;
       
}
.kn-contact-form input:focus,
.kn-contact-form input[type=datetime-local]:focus,
.kn-contact-form select:focus,
.kn-contact-form textarea:focus {
    outline: none;
    border-color: var(--kn-primary);
}
.kn-form-error {
    padding: 10px 14px;
    background: #fadbd8;
    border-radius: 6px;
    color: #922b21;
    font-size: .9rem;
    margin-bottom: 14px;
}
.kn-form-footer {
 display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    justify-content: center !important;
    margin-top: 8px;
    width: 100%;
}

/* ---- SUCCESS ---- */
.kn-success-panel {
    text-align: center;
    padding: 48px 32px !important;
}
.kn-step-panel .kn-success-panel h2{
    color:  var(--kn-primary);
}
.kn-success-icon {
    width: 72px; height: 72px;
    border-radius: 50%;
    background: var(--kn-primary);
    color: #fff;
    font-size: 2rem;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 20px;
    animation: knPop .4s ease;
}
@keyframes knPop {
    0%   { transform: scale(0); }
    70%  { transform: scale(1.1); }
    100% { transform: scale(1); }
}
.kn-success-msg { color: var(--kn-gray); line-height: 1.6; margin-bottom: 16px; }
.kn-phone-link { color: var(--kn-primary); font-weight: 700; text-decoration: none; }

/* ---- BUTTONS ---- */
.kn-btn-primary {
    text-transform: initial;
        margin-right: 0px;
        margin-bottom: 0px;
    height: 48px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 12px 24px;
    background: var(--kn-primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: .95rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--kn-trans);
    text-decoration: none;
}
.kn-btn-primary:hover {
    background: var(--kn-primary-dk);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0,0,0,.18);
}
.kn-btn-primary:disabled { opacity: .6; cursor: not-allowed; transform: none; }

.kn-btn-back {
        margin-bottom: 0px;
    padding: 10px 18px;
    background: transparent;
    color: var(--kn-gray);
    border: 1px solid var(--kn-border);
    border-radius: 8px;
    font-size: .9rem;
    cursor: pointer;
    transition: all var(--kn-trans);

        min-height: 30px !important;
    line-height: 24px;
    height: 48px;
}
.kn-btn-back:hover { border-color: var(--kn-gray); color: var(--kn-dark); }

.kn-btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 12px 24px;
    background: transparent;
    color: var(--kn-primary);
    border: 1px solid var(--kn-primary);
    border-radius: 8px;
    font-size: .95rem;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--kn-trans);
}
.kn-btn-outline:hover {
    background: var(--kn-primary);
    color: #fff;
}
.kn-btn-call { font-size: .9rem; }

.kn-nav-back { margin-top: 16px; }

/* ---- LOADING ---- */
.kn-loading {
    padding: 24px;
    text-align: center;
    color: var(--kn-gray);
    font-size: .9rem;
}
.kn-loading::after {
    content: '';
    display: inline-block;
    width: 16px; height: 16px;
    border: 2px solid var(--kn-border);
    border-top-color: var(--kn-primary);
    border-radius: 50%;
    animation: knSpin .7s linear infinite;
    margin-left: 8px;
    vertical-align: middle;
}
@keyframes knSpin { to { transform: rotate(360deg); } }

/* ---- DATE + TIME ROW ---- */
.kn-datetime-row {
    display: flex;
    gap: 10px;
    align-items: stretch;
}
.kn-date-input {
    flex: 1;
    min-width: 0;
}

.kn-contact-form select.kn-time-select {
    width: 110px !important;
    flex-shrink: 0;
    padding: 11px 10px;
  
    border-radius: 8px;
    font-size: .95rem;
    background: #fff;
    font-family: inherit;
    transition: border-color var(--kn-trans);
    cursor: pointer;
}
.kn-time-select:focus,
.kn-contact-form select.kn-time-select:focus {
    outline: none;
    border-color: var(--kn-primary);
}

/* ---- FLATPICKR CUSTOM THEME ---- */
.kn-datetime-input { cursor: pointer; }

.flatpickr-calendar {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    border-radius: 12px !important;
    box-shadow: 0 8px 32px rgba(0,0,0,.15) !important;
    border: none !important;
    overflow: hidden;
}
.flatpickr-months {
    background: var(--kn-primary, #e84c3d);
    border-radius: 12px 12px 0 0;
    padding: 8px 0;
}
.flatpickr-month,
.flatpickr-prev-month,
.flatpickr-next-month {
    color: #fff !important;
    fill: #fff !important;
}
.flatpickr-prev-month:hover svg,
.flatpickr-next-month:hover svg { fill: rgba(255,255,255,.7) !important; }

.flatpickr-current-month .flatpickr-monthDropdown-months,
.flatpickr-current-month input.cur-year {
    color: #fff !important;
    font-weight: 700;
    font-size: 1rem;
}
.flatpickr-monthDropdown-months{
        min-height: 28px !important;
}
.flatpickr-weekdays { background: var(--kn-primary, #e84c3d); }
span.flatpickr-weekday {
    background: var(--kn-primary, #e84c3d);
    color: rgba(255,255,255,.85) !important;
    font-weight: 600;
    font-size: .78rem;
}
.flatpickr-day {
    border-radius: 8px !important;
    font-size: .88rem;
    color: #2c3e50;
}
.flatpickr-day:hover {
    background: color-mix(in srgb, var(--kn-primary, #e84c3d) 12%, #fff 88%) !important;
    border-color: transparent !important;
    color: var(--kn-primary, #e84c3d) !important;
}
.flatpickr-day.selected,
.flatpickr-day.selected:hover {
    background: var(--kn-primary, #e84c3d) !important;
    border-color: var(--kn-primary, #e84c3d) !important;
    color: #fff !important;
    font-weight: 700;
}
.flatpickr-day.today:not(.selected) {
    border-color: var(--kn-primary, #e84c3d) !important;
    color: var(--kn-primary, #e84c3d) !important;
    font-weight: 700;
}
.flatpickr-day.flatpickr-disabled,
.flatpickr-day.flatpickr-disabled:hover {
    color: #ccc !important;
    cursor: not-allowed;
}
/* Time picker */
.flatpickr-time {
    border-top: 1px solid #f0f0f0 !important;
    background: #fafafa;
}
.flatpickr-time .flatpickr-time-separator { color: var(--kn-primary, #e84c3d); font-weight: 700; }
.flatpickr-time input:hover,
.flatpickr-time input:focus { background: color-mix(in srgb, var(--kn-primary, #e84c3d) 8%, #fff 92%) !important; }
.flatpickr-time .arrowUp:hover::after,
.flatpickr-time .arrowDown:hover::after { border-top-color: var(--kn-primary, #e84c3d); border-bottom-color: var(--kn-primary, #e84c3d); }

/* ---- RESPONSIVE ---- */
@media (max-width: 900px) {
    .kn-wizard-outer { flex-direction: column; align-items: stretch; }
    .kn-media-panel { width: 100%; position: static; }
    .kn-media-left img { max-height: 240px; object-fit: contain; }
    .kn-video-wrap iframe { max-height: 220px; }
}

@media (max-width: 600px) {
    .kn-option-btn {
     padding: 8px 12px;
            margin-right: 4px;
            font-size: 13px;
        text-transform: inherit;
        font-weight: normal;

}
    .kn-step-inner { padding: 20px 16px; }
    .kn-step-title { font-size: 1.2rem; }
    .kn-brands-grid { grid-template-columns: repeat(2, 1fr); gap: 0px; }
    .kn-variants-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); }
    .kn-dot-label { display: none; }
    .kn-steps-bar { gap: 0; }
    .kn-step-line { min-width: 8px; }
    .kn-price-value { font-size: 1.5rem; }
    .kn-result-footer, .kn-criteria-footer, .kn-form-footer { flex-direction: column; }
    .kn-btn-primary, .kn-btn-outline, .kn-btn-back { width: 100%; justify-content: center; }
    .kn-datetime-row { flex-direction: column; }
    .kn-time-select,
    .kn-contact-form select.kn-time-select { width: 100% !important; }
}