/* ============================================================
   Konfigurator – base styles
   Color palette is taken from the reference screenshot:
   - background:   #ffffff
   - text:         #4a5560
   - muted text:   #8c97a3
   - border:       #d8dde3
   - accent blue:  #5b7d9a   (selected outline / button)
   - accent fill:  #eaf1f8   (selected card background tint)
   ============================================================ */

:root {
    --color-bg: #ffffff;
    --color-surface: #ffffff;
    --color-text: #4a5560;
    --color-muted: #8c97a3;
    --color-border: #d8dde3;
    --color-border-strong: #b9c2cc;
    --color-accent: #5b7d9a;
    --color-accent-soft: #eaf1f8;
    --color-accent-hover: #4d6b85;
    --color-shadow: rgba(60, 80, 100, 0.08);

    --radius-card: 6px;
    --radius-btn: 4px;

    --font-family: "Helvetica Neue", Helvetica, Arial, "Segoe UI", sans-serif;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-family);
    font-size: 15px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* -------- Layout -------- */
.configurator {
    max-width: 1080px;
    margin: 0 auto;
    padding: 40px 24px 80px;
}

.configurator__header {
    margin-bottom: 32px;
}

.configurator__title {
    font-size: 20px;
    font-weight: 500;
    color: var(--color-muted);
    margin: 0 0 16px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.configurator__progress {
    width: 100%;
    height: 4px;
    background: var(--color-border);
    border-radius: 2px;
    overflow: hidden;
}

.configurator__progress-bar {
    height: 100%;
    width: 0;
    background: var(--color-accent);
    transition: width 0.35s ease;
}

.configurator__body {
    min-height: 320px;
}

.configurator__footer {
    margin-top: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.configurator__footer .btn--primary {
    margin-left: auto;
}

/* -------- Step -------- */
.step {
    animation: fadeIn 0.25s ease;
}

.step__group + .step__group {
    margin-top: 36px;
}

.step__question {
    font-size: 15px;
    font-weight: 400;
    color: var(--color-text);
    margin: 0 0 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.step__info {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--color-accent);
    color: #fff;
    font-size: 11px;
    font-weight: 600;
    cursor: help;
    user-select: none;
}

/* -------- Card grid -------- */
.cards {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
}

.cards--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.cards--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (max-width: 720px) {
    .cards,
    .cards--3,
    .cards--4 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 420px) {
    .cards,
    .cards--3,
    .cards--4 {
        grid-template-columns: 1fr;
    }
}

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    padding: 24px 16px 16px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    text-align: center;
    transition: border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
    aspect-ratio: 1 / 1;
    min-height: 200px;
    color: var(--color-text);
    user-select: none;
}

.card:hover {
    border-color: var(--color-border-strong);
    box-shadow: 0 2px 8px var(--color-shadow);
}

.card:focus-visible {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.card.is-selected {
    border-color: var(--color-accent);
    background: var(--color-accent-soft);
}

.card__icon {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 8px 0 16px;
}

.card__icon svg {
    width: 100%;
    max-width: 110px;
    height: auto;
    display: block;
}

.card__label {
    font-size: 14px;
    font-weight: 400;
    color: var(--color-muted);
    transition: color 0.15s ease;
}

.card.is-selected .card__label {
    color: var(--color-accent);
}

/* -------- Buttons -------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 12px 28px;
    min-width: 180px;
    border: 1px solid transparent;
    border-radius: var(--radius-btn);
    font-family: inherit;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1px;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
    background: transparent;
}

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

.btn--primary:hover:not(:disabled) {
    background: var(--color-accent-hover);
}

.btn--primary:disabled {
    background: var(--color-border-strong);
    cursor: not-allowed;
    opacity: 0.7;
}

.btn--ghost {
    color: var(--color-muted);
    border-color: var(--color-border);
}

.btn--ghost:hover {
    color: var(--color-text);
    border-color: var(--color-border-strong);
}

.btn__icon {
    font-size: 11px;
    line-height: 1;
}

/* -------- Summary (final step placeholder) -------- */
.summary {
    background: var(--color-accent-soft);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    padding: 24px;
}

.summary h2 {
    margin: 0 0 12px;
    color: var(--color-accent);
    font-size: 18px;
}

.summary dl {
    display: grid;
    grid-template-columns: max-content 1fr;
    gap: 8px 16px;
    margin: 0;
}

.summary dt {
    color: var(--color-muted);
    font-size: 13px;
}

.summary dd {
    margin: 0;
    color: var(--color-text);
    font-size: 14px;
    font-weight: 500;
}

/* -------- Animations -------- */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to   { opacity: 1; transform: translateY(0); }
}