:root {
    --bg: #0c111b;
    --bg-alt: #151b27;
    --panel: #1d2533;
    --panel-alt: #232d3d;
    --accent: #31c5f8;
    --accent-alt: #33e27c;
    --danger: #f76e6e;
    --warn: #f7c948;
    --text: #e7f0fa;
    --text-dim: #9fb1c9;
    --border: #2b3647;
    --radius-sm: 6px;
    --radius: 14px;
    --radius-lg: 22px;
    --shadow: 0 4px 18px -4px rgba(17,25,40,0.4), 0 2px 6px -1px rgba(17,25,40,0.25);
    --focus-ring: 0 0 0 3px rgba(49,197,248,0.25);
    --gradient: linear-gradient(95deg,var(--accent) 0%,var(--accent-alt) 100%);
    --transition: all 0.22s cubic-bezier(.22,.65,.35,1);
    --slot-gradient: linear-gradient(120deg,#243140,#2e3d51);
    font-size: 16px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Poppins', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: radial-gradient(circle at 20% 25%, #161e2b, #0b1019 65%);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

.booking-shell {
    width: min(1080px, 100%);
    margin: clamp(0.5rem, 2.5vh, 1.8rem) auto;
    padding: clamp(0.6rem, 1.2vw, 1.2rem);
}

.panel-title {
    font-size: clamp(1.1rem, 2.8vw, 1.55rem);
    font-weight: 600;
    letter-spacing: 0.5px;
    margin: 0 0 1rem 0;
    background: linear-gradient(90deg,var(--accent), var(--accent-alt));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
    display: inline-block;
}

    .panel-title:after {
        content: "";
        display: block;
        height: 3px;
        width: 46px;
        background: var(--gradient);
        border-radius: 3px;
        margin-top: 6px;
        opacity: 0.7;
    }

.step-panel {
    display: none;
    animation: fadeIn .5s;
}

    .step-panel.active {
        display: block;
    }

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(12px);
    }

    to {
        opacity: 1;
        transform: none;
    }
}

/* Progress header */
.progress-header {
    display: flex;
    align-items: center;
    margin: 0 0 1.4rem 0;
    overflow-x: auto;
    padding: 0 .4rem;
}

.step-pill {
    background: var(--panel);
    border: 1px solid var(--border);
    padding: .55rem .95rem .55rem .7rem;
    border-radius: 999px;
    display: flex;
    align-items: center;
    gap: .55rem;
    font-size: .78rem;
    font-weight: 500;
    color: var(--text-dim);
    position: relative;
    min-width: 90px;
    transition: var(--transition);
    flex: 0 0 auto;
}

    .step-pill.active {
        background: var(--gradient);
        color: #fff;
        border-color: var(--accent-alt);
        box-shadow: 0 4px 16px -2px rgba(49,197,248,0.35);
    }

    .step-pill.completed {
        background: linear-gradient(90deg,#2a394a,#1e2735);
        color: var(--accent-alt);
        border-color: #324256;
    }

.step-index {
    background: #243140;
    padding: .38rem .55rem;
    border-radius: 50%;
    font-size: .7rem;
    font-weight: 600;
    color: var(--accent-alt);
    min-width: 28px;
    text-align: center;
}

.step-pill.active .step-index {
    background: rgba(255,255,255,0.16);
    color: #fff;
}

.step-pill.completed .step-index {
    background: rgba(255,255,255,0.12);
    color: var(--accent-alt);
}

.step-connector {
    flex: 1;
    height: 2px;
    margin: 0 .5rem;
    background: linear-gradient(90deg,#243140,#2f3d50);
    border-radius: 2px;
    position: relative;
}

@media (max-width:640px) {
    .progress-header {
        gap: .4rem;
    }

    .step-connector {
        display: none;
    }
}

/* Doctor grid */
.doctor-grid {
    display: grid;
    gap: .9rem;
    grid-template-columns: repeat(auto-fill,minmax(230px,1fr));
    margin-bottom: 1.3rem;
}

.doctor-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: .9rem .9rem;
    display: flex;
    gap: .85rem;
    align-items: flex-start;
    cursor: pointer;
    position: relative;
    transition: var(--transition);
    min-height: 100px;
}

    .doctor-card:hover {
        border-color: var(--accent);
        transform: translateY(-3px);
        box-shadow: 0 6px 22px -6px rgba(49,197,248,0.35);
    }

    .doctor-card.selected {
        border-color: var(--accent-alt);
        background: linear-gradient(120deg,#223040,#1a2330);
        box-shadow: 0 6px 20px -4px rgba(51,226,124,0.42);
    }

.doc-avatar {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--gradient);
    font-weight: 600;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    flex-shrink: 0;
    box-shadow: inset 0 0 0 2px rgba(255,255,255,0.15);
}

.doc-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
    flex: 1;
}

.doc-name {
    font-weight: 600;
    font-size: .95rem;
    margin: 0 0 2px 0;
    color: #fff;
    line-height: 1.25;
}

.doc-title {
    font-size: .72rem;
    font-weight: 500;
    color: var(--text-dim);
    margin-bottom: .45rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 160px;
}

.doc-meta {
    display: flex;
    gap: .6rem;
    font-size: .62rem;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--accent);
    font-weight: 600;
}

@media (max-width:500px) {
    .doctor-grid {
        grid-template-columns: repeat(auto-fill,minmax(175px,1fr));
    }

    .doc-title {
        max-width: 120px;
    }
}

/* Appointment Type */
.type-section {
    background: var(--panel);
    border: 1px solid var(--border);
    padding: 1rem .95rem 1.05rem;
    border-radius: var(--radius);
    margin: .4rem 0 1.2rem;
}

.sub-title {
    margin: 0 0 .75rem 0;
    font-size: .85rem;
    font-weight: 600;
    letter-spacing: .04em;
    color: var(--accent-alt);
    text-transform: uppercase;
    opacity: .9;
}

.appt-type-group {
    display: flex;
    flex-wrap: wrap;
    gap: .75rem;
}

.appt-type-card {
    flex: 1 1 220px;
    min-width: 200px;
    background: var(--panel-alt);
    border: 1px solid #2e3a4d;
    border-radius: var(--radius-sm);
    padding: .75rem .75rem .8rem;
    cursor: pointer;
    position: relative;
    transition: var(--transition);
}

    .appt-type-card:hover {
        border-color: var(--accent);
    }

    .appt-type-card.selected {
        border-color: var(--accent-alt);
        background: linear-gradient(120deg,#1f2b39,#253445);
        box-shadow: 0 4px 14px -4px rgba(51,226,124,0.5);
    }

.type-name {
    font-weight: 600;
    font-size: .75rem;
    letter-spacing: .05em;
    text-transform: uppercase;
    margin-bottom: .4rem;
    color: var(--accent);
}

.type-desc {
    font-size: .68rem;
    line-height: 1.35;
    color: var(--text-dim);
}

/* Navigation buttons */
.nav-buttons {
    display: flex;
    gap: .75rem;
    margin-top: 1.4rem;
    flex-wrap: wrap;
}

.btn {
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-weight: 600;
    font-size: .72rem;
    letter-spacing: .06em;
    padding: .85rem 1.25rem;
    border-radius: 100px;
    text-transform: uppercase;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .55rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

    .btn.primary {
        background: var(--gradient);
        color: #fff;
        box-shadow: 0 6px 18px -4px rgba(49,197,248,0.35);
    }

        .btn.primary:disabled {
            background: #223042;
            color: #6c8096;
            box-shadow: none;
            cursor: not-allowed;
        }

        .btn.primary:not(:disabled):hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 28px -6px rgba(49,197,248,0.55);
        }

    .btn.secondary {
        background: #243244;
        color: var(--accent);
        border: 1px solid var(--accent);
    }

        .btn.secondary:hover {
            background: var(--accent);
            color: #fff;
        }

/* Date strip */
.date-strip-wrapper {
    display: flex;
    align-items: center;
    gap: .6rem;
    margin-bottom: 1.1rem;
}

.strip-nav {
    background: #243243;
    border: 1px solid var(--border);
    color: var(--accent);
    width: 42px;
    height: 42px;
    border-radius: 12px;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

    .strip-nav:hover {
        background: var(--accent);
        color: #fff;
    }

.date-strip {
    display: flex;
    gap: .65rem;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding: .2rem .3rem .5rem .3rem;
    flex: 1;
}

    .date-strip::-webkit-scrollbar {
        display: none;
    }

.date-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: .6rem .65rem;
    min-width: 108px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: .3rem;
    position: relative;
    transition: var(--transition);
    box-shadow: 0 2px 10px -4px rgba(0,0,0,0.35);
}

    .date-card.loading {
        opacity: .55;
        cursor: wait;
        pointer-events: none;
    }

    .date-card.active {
        border-color: var(--accent-alt);
        background: linear-gradient(120deg,#233142,#1d2735);
        box-shadow: 0 6px 20px -6px rgba(51,226,124,0.55);
        transform: translateY(-3px);
    }

    .date-card.closed {
        opacity: .55;
    }

    .date-card:not(.active):hover {
        border-color: var(--accent);
        transform: translateY(-3px);
    }

.dow {
    font-size: .68rem;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: .08em;
    color: var(--accent);
}

.dom {
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1;
    color: #fff;
}

.avail-count {
    font-size: .58rem;
    text-transform: uppercase;
    letter-spacing: .08em;
    font-weight: 600;
    color: var(--text-dim);
}

    .avail-count.few {
        color: var(--warn);
    }

    .avail-count.none {
        color: var(--danger);
    }

    .avail-count.many {
        color: var(--accent-alt);
    }

/* Slots */
.slot-area-wrapper {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: .95rem .95rem 1rem;
    box-shadow: var(--shadow);
}

.slots-header {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    align-items: center;
    gap: .75rem;
    margin-bottom: .85rem;
}

.slots-date-label {
    font-weight: 600;
    font-size: .9rem;
    color: #fff;
    letter-spacing: .04em;
}

.slots-meta {
    font-size: .68rem;
    font-weight: 600;
    letter-spacing: .07em;
    color: var(--accent-alt);
    text-transform: uppercase;
}

.slots-container {
    min-height: 120px;
    position: relative;
}

.slot-grid {
    display: grid;
    gap: .65rem;
    grid-template-columns: repeat(auto-fill,minmax(110px,1fr));
}

.slot-chip {
    background: var(--slot-gradient);
    border: 1px solid #324356;
    border-radius: 14px;
    padding: .7rem .45rem;
    text-align: center;
    cursor: pointer;
    font-size: .72rem;
    font-weight: 600;
    color: var(--text);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    opacity: 0;
    animation: slotIn .45s forwards;
    animation-delay: calc(var(--i) * 40ms);
    box-shadow: 0 2px 8px -2px rgba(0,0,0,0.35);
}

@keyframes slotIn {
    from {
        opacity: 0;
        transform: translateY(10px) scale(.96);
    }

    to {
        opacity: 1;
        transform: none;
    }
}

.slot-chip:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-3px);
}

.slot-chip.selected {
    background: var(--gradient);
    border-color: var(--accent-alt);
    color: #fff;
    box-shadow: 0 6px 16px -4px rgba(49,197,248,0.55);
    transform: translateY(-3px) scale(1.04);
}

.empty-msg {
    text-align: center;
    font-size: .8rem;
    color: var(--text-dim);
    margin: 1.2rem 0;
    font-style: italic;
}

    .empty-msg.large {
        font-size: .9rem;
    }

.inline-loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: .8rem .4rem;
}

    .inline-loader.tiny {
        min-height: 40px;
    }

    .inline-loader.medium {
        min-height: 80px;
    }

    .inline-loader .bar {
        width: 6px;
        height: 22px;
        border-radius: 4px;
        background: var(--gradient);
        animation: barPulse 1s infinite ease-in-out;
        margin: 0 2px;
    }

        .inline-loader .bar:nth-child(1) {
            animation-delay: 0s;
        }

        .inline-loader .bar:nth-child(2) {
            animation-delay: .12s;
        }

        .inline-loader .bar:nth-child(3) {
            animation-delay: .24s;
        }

        .inline-loader .bar:nth-child(4) {
            animation-delay: .36s;
        }

    .inline-loader span {
        font-size: .65rem;
        letter-spacing: .06em;
        font-weight: 600;
        text-transform: uppercase;
        color: var(--accent);
    }

@keyframes barPulse {
    0%,100% {
        transform: scaleY(.4);
        opacity: .55;
    }

    40% {
        transform: scaleY(1);
        opacity: 1;
    }
}

/* Legend */
.legend {
    display: flex;
    flex-wrap: wrap;
    gap: .75rem;
    margin: 1rem 0 .3rem;
    font-size: .62rem;
    letter-spacing: .06em;
    text-transform: uppercase;
    font-weight: 600;
    color: var(--text-dim);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: .4rem;
}

.legend-swatch {
    width: 18px;
    height: 10px;
    border-radius: 4px;
    background: #2c3a4b;
    border: 1px solid #3a4a5c;
}

    .legend-swatch.available {
        background: var(--gradient);
        border-color: var(--accent-alt);
    }

    .legend-swatch.limited {
        background: var(--warn);
        border-color: #f5ba30;
    }

    .legend-swatch.closed {
        background: #354556;
        border-color: #42576d;
    }

/* Confirmation */
.confirm-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.1rem 1rem 1.2rem;
    box-shadow: var(--shadow);
}

.confirm-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: .55rem 0;
    border-bottom: 1px dashed #2d3a4d;
    gap: 1rem;
}

    .confirm-row:last-child {
        border-bottom: none;
    }

    .confirm-row .label {
        font-size: .7rem;
        font-weight: 600;
        letter-spacing: .07em;
        color: var(--accent-alt);
        text-transform: uppercase;
        min-width: 100px;
    }

    .confirm-row .value {
        font-size: .8rem;
        font-weight: 500;
        color: #fff;
        text-align: right;
        flex: 1;
    }

.confirm-note {
    margin-top: 1rem;
    font-size: .65rem;
    color: var(--text-dim);
    letter-spacing: .05em;
    line-height: 1.4;
}

.error-msg {
    color: var(--danger);
    font-size: .75rem;
    text-align: center;
    padding: .8rem 0;
}

.loading-block {
    position: relative;
    min-height: 100px;
}

/* Scroll improvements */
.date-strip, .doctor-grid {
    -webkit-overflow-scrolling: touch;
}

/* Responsiveness */
@media (max-width:850px) {
    .slot-grid {
        grid-template-columns: repeat(auto-fill,minmax(90px,1fr));
    }

    .date-card {
        min-width: 95px;
    }

    .confirm-row .label {
        min-width: 80px;
    }
}

@media (max-width:600px) {
    .progress-header {
        margin-bottom: 1rem;
    }

    .panel-title {
        font-size: 1.25rem;
    }

    .doctor-grid {
        gap: .75rem;
    }

    .appt-type-card {
        min-width: 160px;
        flex: 1 1 160px;
    }

    .slot-grid {
        grid-template-columns: repeat(auto-fill,minmax(82px,1fr));
        gap: .5rem;
    }

    .slot-chip {
        font-size: .66rem;
        padding: .55rem .4rem;
    }

    .dom {
        font-size: 1.05rem;
    }
}

@media (max-width:420px) {
    .date-card {
        min-width: 88px;
        padding: .5rem .55rem;
    }

    .dow {
        font-size: .58rem;
    }

    .avail-count {
        font-size: .5rem;
    }

    .slot-grid {
        grid-template-columns: repeat(auto-fill,minmax(74px,1fr));
    }
}