/* =========================================================================
   ZST Beauty — Booking Redesign CSS
   Palette : grey #4A4D50 · black #1a1a1a · white · bg #F9F9F9
   ========================================================================= */

/* ── Variables ── */
:root {
    --bk-accent: #4A4D50;
    --bk-dark: #1a1a1a;
    --bk-text: #333333;
    --bk-muted: #7c7c7c;
    --bk-surface: #ffffff;
    --bk-bg: #F9F9F9;
    --bk-border: #e5e5e5;
    --bk-success: #27ae60;
    --bk-danger: #e74c3c;
    --bk-radius: 12px;
    --bk-shadow: 0 2px 12px rgba(0,0,0,.08);
    --bk-font: 'Poppins', sans-serif;
    --bk-font-body: 'Open Sans', sans-serif;
    --bk-transition: .3s ease;
}

/* ── Reset & Base ── */
.bk {
    min-height: 100vh;
    background: var(--bk-bg);
    font-family: var(--bk-font-body);
    color: var(--bk-text);
    display: flex;
    flex-direction: column;
}
.bk *, .bk *::before, .bk *::after { box-sizing: border-box; }

/* ====================
   TOP BAR
   ==================== */
.bk-topbar {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    background: var(--bk-surface);
    border-bottom: 1px solid var(--bk-border);
    box-shadow: 0 1px 4px rgba(0,0,0,.04);
}
.bk-topbar__back {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--bk-accent);
    text-decoration: none;
    font-size: .875rem;
    font-weight: 500;
    transition: color var(--bk-transition);
}
.bk-topbar__back:hover { color: var(--bk-dark); }
.bk-topbar__brand {
    display: flex;
    align-items: center;
    gap: 10px;
}
.bk-topbar__logo {
    height: 36px;
    width: auto;
}
.bk-topbar__name {
    font-family: var(--bk-font);
    font-weight: 600;
    font-size: 1rem;
    color: var(--bk-dark);
    letter-spacing: .02em;
}
.bk-topbar__help a {
    color: var(--bk-accent);
    font-size: 1.1rem;
    transition: color var(--bk-transition);
}
.bk-topbar__help a:hover { color: var(--bk-dark); }

/* ====================
   PROGRESS BAR
   ==================== */
.bk-progress {
    background: var(--bk-surface);
    padding: 16px 24px 20px;
    position: relative;
}
.bk-progress__track {
    position: absolute;
    top: 34px;
    left: 60px;
    right: 60px;
    height: 3px;
    background: var(--bk-border);
    border-radius: 2px;
    z-index: 0;
}
.bk-progress__fill {
    position: absolute;
    top: 0; left: 0;
    height: 100%;
    width: 0%;
    background: var(--bk-accent);
    border-radius: 2px;
    transition: width .5s ease;
}
.bk-progress__steps {
    display: flex;
    justify-content: space-between;
    position: relative;
    z-index: 1;
}
.bk-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    flex: 1;
}
.bk-step__dot {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .85rem;
    background: var(--bk-bg);
    border: 2px solid var(--bk-border);
    color: var(--bk-muted);
    transition: all var(--bk-transition);
}
.bk-step.active .bk-step__dot {
    background: var(--bk-accent);
    border-color: var(--bk-accent);
    color: #fff;
    box-shadow: 0 2px 8px rgba(74,77,80,.3);
}
.bk-step.done .bk-step__dot {
    background: var(--bk-success);
    border-color: var(--bk-success);
    color: #fff;
}
.bk-step__label {
    font-size: .7rem;
    font-weight: 500;
    color: var(--bk-muted);
    text-transform: uppercase;
    letter-spacing: .04em;
}
.bk-step.active .bk-step__label { color: var(--bk-dark); font-weight: 600; }
.bk-step.done .bk-step__label { color: var(--bk-success); }

/* ====================
   CONTAINER & SLIDES
   ==================== */
.bk-container {
    flex: 1;
    max-width: 880px;
    width: 100%;
    margin: 0 auto;
    padding: 0 20px 30px;
}
.bk-slide {
    display: none;
    animation: bkFadeIn .4s ease;
}
.bk-slide.active { display: block; }

@keyframes bkFadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.bk-slide__header {
    text-align: center;
    padding: 24px 0 20px;
}
.bk-slide__tag {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 20px;
    background: var(--bk-accent);
    color: #fff;
    font-size: .7rem;
    font-weight: 600;
    letter-spacing: .05em;
    text-transform: uppercase;
    margin-bottom: 10px;
}
.bk-slide__title {
    font-family: var(--bk-font);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--bk-dark);
    margin: 0 0 6px;
}
.bk-slide__desc {
    font-size: .9rem;
    color: var(--bk-muted);
    margin: 0;
}

/* ====================
   LOADING SPINNER
   ==================== */
.bk-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 60px 20px;
    color: var(--bk-muted);
    gap: 10px;
}
.bk-loading i { font-size: 1.6rem; }
.bk-loading p { margin: 0; font-size: .9rem; }

/* ====================
   TYPES GRID (Step 1)
   ==================== */
.bk-types-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
}
.bk-type-card {
    background: var(--bk-surface);
    border: 2px solid var(--bk-border);
    border-radius: var(--bk-radius);
    padding: 28px 20px;
    text-align: center;
    cursor: pointer;
    transition: all var(--bk-transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}
.bk-type-card:hover {
    border-color: var(--bk-accent);
    transform: translateY(-3px);
    box-shadow: var(--bk-shadow);
}
.bk-type-card.selected {
    border-color: var(--bk-accent);
    background: rgba(74,77,80,.06);
    box-shadow: 0 0 0 3px rgba(74,77,80,.1);
}
.bk-type-card__icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--bk-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: var(--bk-accent);
    border: 2px solid var(--bk-border);
    transition: all var(--bk-transition);
}
.bk-type-card.selected .bk-type-card__icon,
.bk-type-card:hover .bk-type-card__icon {
    background: var(--bk-accent);
    border-color: var(--bk-accent);
    color: #fff;
}
.bk-type-card__name {
    font-family: var(--bk-font);
    font-weight: 600;
    font-size: 1rem;
    color: var(--bk-dark);
}
.bk-type-card__desc {
    font-size: .82rem;
    color: var(--bk-muted);
    line-height: 1.45;
}
.bk-type-card__acompte {
    margin-top: auto;
    padding-top: 8px;
    font-size: .75rem;
    font-weight: 600;
    color: var(--bk-accent);
    letter-spacing: .02em;
}

/* ====================
   SERVICES GRID (Step 2)
   ==================== */
.bk-services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 16px;
}
.bk-service-card {
    background: var(--bk-surface);
    border: 2px solid var(--bk-border);
    border-radius: var(--bk-radius);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--bk-transition);
    display: flex;
    flex-direction: column;
}
.bk-service-card:hover {
    border-color: var(--bk-accent);
    transform: translateY(-3px);
    box-shadow: var(--bk-shadow);
}
.bk-service-card.selected {
    border-color: var(--bk-accent);
    background: rgba(74,77,80,.04);
    box-shadow: 0 0 0 3px rgba(74,77,80,.1);
}
.bk-service-card__img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    background: var(--bk-bg);
}
.bk-service-card__img-placeholder {
    width: 100%;
    height: 160px;
    background: linear-gradient(135deg, var(--bk-bg) 0%, var(--bk-border) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--bk-muted);
}
.bk-service-card__body {
    padding: 16px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.bk-service-card__cat {
    font-size: .7rem;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--bk-accent);
    font-weight: 600;
}
.bk-service-card__name {
    font-family: var(--bk-font);
    font-weight: 600;
    font-size: 1rem;
    color: var(--bk-dark);
}
.bk-service-card__desc {
    font-size: .82rem;
    color: var(--bk-muted);
    line-height: 1.45;
    flex: 1;
}
.bk-service-card__footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-top: 1px solid var(--bk-border);
    background: var(--bk-bg);
}
.bk-service-card__price {
    font-family: var(--bk-font);
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--bk-dark);
}
.bk-service-card__duration {
    font-size: .8rem;
    color: var(--bk-muted);
}
.bk-service-card__duration i { margin-right: 4px; }
.bk-service-card__check {
    position: absolute;
    top: 12px; right: 12px;
    width: 28px; height: 28px;
    border-radius: 50%;
    background: var(--bk-success);
    color: #fff;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: .8rem;
}
.bk-service-card.selected { position: relative; }
.bk-service-card.selected .bk-service-card__check { display: flex; }

/* ====================
   OPTIONS GRID (Step 3)
   ==================== */
.bk-options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 14px;
    margin-bottom: 20px;
}
.bk-option-card {
    background: var(--bk-surface);
    border: 2px solid var(--bk-border);
    border-radius: var(--bk-radius);
    padding: 18px;
    cursor: pointer;
    transition: all var(--bk-transition);
    display: flex;
    align-items: flex-start;
    gap: 14px;
}
.bk-option-card:hover {
    border-color: var(--bk-accent);
    box-shadow: var(--bk-shadow);
}
.bk-option-card.selected {
    border-color: var(--bk-accent);
    background: rgba(74,77,80,.04);
}
.bk-option-card__check {
    width: 24px;
    height: 24px;
    min-width: 24px;
    border-radius: 6px;
    border: 2px solid var(--bk-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .7rem;
    color: transparent;
    transition: all var(--bk-transition);
    margin-top: 2px;
}
.bk-option-card.selected .bk-option-card__check {
    background: var(--bk-accent);
    border-color: var(--bk-accent);
    color: #fff;
}
.bk-option-card__info { flex: 1; }
.bk-option-card__name {
    font-family: var(--bk-font);
    font-weight: 600;
    font-size: .9rem;
    color: var(--bk-dark);
    margin-bottom: 4px;
}
.bk-option-card__desc {
    font-size: .8rem;
    color: var(--bk-muted);
    line-height: 1.4;
}
.bk-option-card__extra {
    font-size: .75rem;
    color: var(--bk-accent);
    font-weight: 600;
    margin-top: 6px;
}
.bk-no-options {
    text-align: center;
    padding: 30px;
    color: var(--bk-muted);
    font-size: .9rem;
}

/* Custom options */
.bk-custom-options {
    border-top: 1px solid var(--bk-border);
    padding-top: 20px;
}
.bk-custom-options__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}
.bk-custom-options__header h3 {
    font-family: var(--bk-font);
    font-size: .95rem;
    font-weight: 600;
    color: var(--bk-dark);
    margin: 0;
}
.bk-custom-options__header h3 i { color: var(--bk-accent); margin-right: 6px; }
.bk-btn-add {
    background: none;
    border: 1px solid var(--bk-accent);
    color: var(--bk-accent);
    padding: 6px 14px;
    border-radius: 8px;
    font-size: .8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--bk-transition);
}
.bk-btn-add:hover {
    background: var(--bk-accent);
    color: #fff;
}
.bk-custom-option-row {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
    align-items: center;
}
.bk-custom-option-row input {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid var(--bk-border);
    border-radius: 8px;
    font-size: .85rem;
    font-family: var(--bk-font-body);
}
.bk-custom-option-row input:focus {
    outline: none;
    border-color: var(--bk-accent);
    box-shadow: 0 0 0 3px rgba(74,77,80,.08);
}
.bk-custom-option-row .bk-btn-remove {
    width: 34px; height: 34px;
    border-radius: 8px;
    border: none;
    background: rgba(231,76,60,.08);
    color: var(--bk-danger);
    font-size: .85rem;
    cursor: pointer;
    transition: all var(--bk-transition);
}
.bk-custom-option-row .bk-btn-remove:hover {
    background: var(--bk-danger);
    color: #fff;
}

/* ====================
   CALENDAR (Step 4)
   ==================== */
.bk-datetime {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    align-items: start;
}
.bk-calendar {
    background: var(--bk-surface);
    border-radius: var(--bk-radius);
    border: 1px solid var(--bk-border);
    padding: 20px;
}
.bk-calendar__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}
.bk-calendar__nav {
    width: 36px; height: 36px;
    border-radius: 50%;
    border: 1px solid var(--bk-border);
    background: var(--bk-surface);
    color: var(--bk-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .8rem;
    transition: all var(--bk-transition);
}
.bk-calendar__nav:hover {
    background: var(--bk-accent);
    border-color: var(--bk-accent);
    color: #fff;
}
.bk-calendar__month {
    font-family: var(--bk-font);
    font-size: 1rem;
    font-weight: 600;
    color: var(--bk-dark);
    margin: 0;
}
.bk-calendar__grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
}
.bk-calendar__day-name {
    text-align: center;
    font-size: .7rem;
    font-weight: 600;
    color: var(--bk-muted);
    text-transform: uppercase;
    padding: 6px 0;
    letter-spacing: .04em;
}
.bk-calendar__day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: .85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all .2s ease;
    color: var(--bk-text);
    border: none;
    background: none;
}
.bk-calendar__day:hover:not(.disabled):not(.empty) {
    background: rgba(74,77,80,.08);
}
.bk-calendar__day.selected {
    background: var(--bk-accent);
    color: #fff;
    font-weight: 700;
}
.bk-calendar__day.today {
    border: 2px solid var(--bk-accent);
    font-weight: 700;
}
.bk-calendar__day.disabled {
    color: #d0d0d0;
    cursor: not-allowed;
}
.bk-calendar__day.empty { cursor: default; }

/* Time slots */
.bk-timeslots {
    background: var(--bk-surface);
    border-radius: var(--bk-radius);
    border: 1px solid var(--bk-border);
    padding: 20px;
}
.bk-timeslots__title {
    font-family: var(--bk-font);
    font-size: 1rem;
    font-weight: 600;
    color: var(--bk-dark);
    margin: 0 0 16px;
}
.bk-timeslots__title i { color: var(--bk-accent); margin-right: 6px; }
.bk-timeslots__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}
.bk-timeslot {
    padding: 12px 8px;
    text-align: center;
    border: 1px solid var(--bk-border);
    border-radius: 8px;
    font-size: .85rem;
    font-weight: 500;
    color: var(--bk-text);
    cursor: pointer;
    transition: all .2s ease;
    background: var(--bk-surface);
}
.bk-timeslot:hover {
    border-color: var(--bk-accent);
    background: rgba(74,77,80,.04);
}
.bk-timeslot.selected {
    background: var(--bk-accent);
    border-color: var(--bk-accent);
    color: #fff;
    font-weight: 600;
}
.bk-timeslot.unavailable {
    color: #ccc;
    cursor: not-allowed;
    text-decoration: line-through;
    background: var(--bk-bg);
}
.bk-timeslots__empty {
    text-align: center;
    padding: 30px;
    color: var(--bk-muted);
    font-size: .85rem;
}
.bk-timeslots__loading {
    text-align: center;
    padding: 30px;
    color: var(--bk-muted);
}

/* ====================
   FORM (Step 5)
   ==================== */
.bk-form {
    max-width: 500px;
    margin: 0 auto;
}
.bk-form__group {
    margin-bottom: 18px;
}
.bk-form__group label {
    display: block;
    font-family: var(--bk-font);
    font-size: .85rem;
    font-weight: 600;
    color: var(--bk-dark);
    margin-bottom: 6px;
}
.bk-form__group label i {
    color: var(--bk-accent);
    margin-right: 6px;
    width: 16px;
    text-align: center;
}
.bk-form__group input,
.bk-form__group textarea,
.bk-form__group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--bk-border);
    border-radius: 10px;
    font-size: .9rem;
    font-family: var(--bk-font-body);
    color: var(--bk-text);
    background: var(--bk-surface);
    transition: all var(--bk-transition);
}
.bk-form__group input:focus,
.bk-form__group textarea:focus,
.bk-form__group select:focus {
    outline: none;
    border-color: var(--bk-accent);
    box-shadow: 0 0 0 3px rgba(74,77,80,.08);
}
.bk-form__group input::placeholder,
.bk-form__group textarea::placeholder {
    color: #bbb;
}
.bk-form__group small {
    display: block;
    margin-top: 4px;
    font-size: .75rem;
    color: var(--bk-muted);
}

/* ====================
   TIMER
   ==================== */
.bk-timer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    background: rgba(74,77,80,.06);
    border-radius: 10px;
    font-size: .9rem;
    color: var(--bk-text);
    margin-bottom: 20px;
}
.bk-timer i { color: var(--bk-accent); }
.bk-timer strong { color: var(--bk-dark); font-size: 1.05rem; }
.bk-timer.urgent {
    background: rgba(231,76,60,.08);
    color: var(--bk-danger);
}
.bk-timer.urgent i,
.bk-timer.urgent strong { color: var(--bk-danger); }

/* ====================
   SUMMARY (Step 6)
   ==================== */
.bk-summary {
    background: var(--bk-surface);
    border: 1px solid var(--bk-border);
    border-radius: var(--bk-radius);
    padding: 20px;
    margin-bottom: 20px;
}
.bk-summary__row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    font-size: .88rem;
    border-bottom: 1px solid var(--bk-bg);
}
.bk-summary__row:last-child { border-bottom: none; }
.bk-summary__label { color: var(--bk-muted); }
.bk-summary__value { font-weight: 600; color: var(--bk-dark); }
.bk-summary__title {
    font-family: var(--bk-font);
    font-size: 1rem;
    font-weight: 700;
    color: var(--bk-dark);
    margin: 0 0 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.bk-summary__title i { color: var(--bk-accent); }

/* ====================
   PAYMENT (Step 6)
   ==================== */
.bk-payment {
    background: var(--bk-surface);
    border: 1px solid var(--bk-border);
    border-radius: var(--bk-radius);
    padding: 24px;
}
.bk-payment__amount {
    text-align: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--bk-border);
}
.bk-payment__amount span {
    display: block;
    font-size: .85rem;
    color: var(--bk-muted);
    margin-bottom: 4px;
}
.bk-payment__amount strong {
    font-family: var(--bk-font);
    font-size: 1.5rem;
    color: var(--bk-dark);
}
.bk-payment__info {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px;
    background: rgba(74,77,80,.04);
    border-radius: 10px;
    margin-bottom: 20px;
}
.bk-payment__info > i {
    font-size: 1.4rem;
    color: var(--bk-accent);
}
.bk-payment__info p {
    margin: 0;
    font-size: .85rem;
    color: var(--bk-text);
    line-height: 1.5;
}
.bk-payment__info strong { color: var(--bk-dark); }

/* ====================
   NAVIGATION BUTTONS
   ==================== */
.bk-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    gap: 12px;
    max-width: 880px;
    margin: 0 auto;
}
.bk-nav__prev,
.bk-nav__next {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 10px;
    font-family: var(--bk-font);
    font-size: .9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--bk-transition);
    border: none;
}
.bk-nav__prev {
    background: var(--bk-surface);
    border: 1px solid var(--bk-border);
    color: var(--bk-text);
}
.bk-nav__prev:hover {
    border-color: var(--bk-accent);
    color: var(--bk-dark);
}
.bk-nav__next {
    background: var(--bk-accent);
    color: #fff;
    margin-left: auto;
}
.bk-nav__next:hover:not(:disabled) {
    background: var(--bk-dark);
    box-shadow: 0 4px 12px rgba(26,26,26,.2);
}
.bk-nav__next:disabled {
    opacity: .45;
    cursor: not-allowed;
}
.bk-nav__next.submit {
    background: var(--bk-success);
}
.bk-nav__next.submit:hover:not(:disabled) {
    background: #219a52;
}

/* ====================
   RESPONSIVE
   ==================== */
@media (max-width: 768px) {
    .bk-topbar { padding: 10px 16px; }
    .bk-topbar__back span { display: none; }
    .bk-topbar__name { font-size: .9rem; }
    .bk-topbar__logo { height: 30px; }

    .bk-progress { padding: 12px 12px 16px; }
    .bk-progress__track { left: 30px; right: 30px; top: 30px; }
    .bk-step__dot { width: 32px; height: 32px; font-size: .75rem; }
    .bk-step__label { font-size: .6rem; }

    .bk-container { padding: 0 16px 24px; }
    .bk-slide__title { font-size: 1.2rem; }
    .bk-slide__header { padding: 18px 0 14px; }

    .bk-types-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
    .bk-type-card { padding: 20px 14px; }

    .bk-services-grid { grid-template-columns: 1fr; gap: 12px; }
    .bk-service-card__img,
    .bk-service-card__img-placeholder { height: 130px; }

    .bk-options-grid { grid-template-columns: 1fr; }

    .bk-datetime { grid-template-columns: 1fr; gap: 16px; }
    .bk-timeslots__grid { grid-template-columns: repeat(3, 1fr); }

    .bk-nav__prev,
    .bk-nav__next { padding: 12px 20px; font-size: .85rem; }
}

@media (max-width: 480px) {
    .bk-types-grid { grid-template-columns: 1fr; }
    .bk-type-card { flex-direction: row; text-align: left; padding: 16px; }
    .bk-type-card__icon { width: 48px; height: 48px; font-size: 1.2rem; }

    .bk-step__label { display: none; }
    .bk-progress__track { left: 20px; right: 20px; top: 28px; }
    .bk-step__dot { width: 28px; height: 28px; font-size: .65rem; }

    .bk-timeslots__grid { grid-template-columns: repeat(2, 1fr); }

    .bk-payment__amount strong { font-size: 1.3rem; }
}

/* ====================
   ALERTS & MESSAGES
   ==================== */
.bk-alert {
    padding: 14px 18px;
    border-radius: 10px;
    font-size: .88rem;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.bk-alert--success {
    background: rgba(39,174,96,.08);
    color: var(--bk-success);
    border: 1px solid rgba(39,174,96,.2);
}
.bk-alert--error {
    background: rgba(231,76,60,.08);
    color: var(--bk-danger);
    border: 1px solid rgba(231,76,60,.2);
}
.bk-alert--info {
    background: rgba(74,77,80,.06);
    color: var(--bk-accent);
    border: 1px solid rgba(74,77,80,.15);
}