/* ==========================================================================
   IS4IT Relaunch Design Language
   Reusable component layer derived from the IS4IT Relaunch Figma and
   design-system.json. Scoped with the `is4-` prefix so it never collides
   with the legacy OptCare (`oc-`) palette/components.

   Loaded AFTER optcare-design.css so these tokens/components win inside the
   customer journey pages.
   ========================================================================== */

/* --- Design tokens (design-system.json) --- */
:root {
    /* Brand palette */
    --is4-red: #FF665A;
    --is4-red-100: #FE8B82;
    --is4-red-200: #FFADA9;
    --is4-blue: #0360F0;
    --is4-blue-100: #7EAFF5;
    --is4-purple: #C6ADF7;
    --is4-purple-100: #D3C0F8;
    --is4-purple-200: #DCD3F4;
    --is4-purple-50: #EEE7FF;
    --is4-rose: #ECA4A4;
    --is4-rose-100: #F3CFCF;
    --is4-rose-200: #F4DFDF;
    --is4-lime: #C3F481;
    --is4-lime-100: #DEF7BD;
    --is4-black: #303030;
    --is4-black-100: #4D4D4D;
    --is4-white: #F9F9F9;
    --is4-white-100: #E6E6E6;

    /* Semantic aliases */
    --is4-surface: var(--is4-white);
    --is4-surface-muted: var(--is4-white-100);
    --is4-text: var(--is4-black);
    --is4-text-muted: var(--is4-black-100);
    --is4-border: var(--is4-white-100);
    --is4-focus: var(--is4-blue);
    --is4-success: var(--is4-lime);
    --is4-danger: var(--is4-red);

    /* Typography (Eurostile display from optcare-design.css :root) */
    --is4-font-display: 'Eurostile Demi', 'Eurostile', 'Square 721', Arial, sans-serif;
    --is4-font-body: Arial, 'Helvetica Neue', Helvetica, system-ui, sans-serif;
    --is4-type-h2: clamp(2rem, 5vw, 3.5rem);
    --is4-type-h3: clamp(1.5rem, 3.5vw, 2.5rem);
    --is4-type-h4: clamp(1.25rem, 2vw, 1.5rem);
    --is4-type-lead: clamp(1.125rem, 2vw, 1.5rem);
    --is4-type-body: 1rem;
    --is4-type-small: 0.875rem;
    --is4-type-caption: 0.75rem;

    /* Spacing (4px grid) */
    --is4-space-1: 4px;
    --is4-space-2: 8px;
    --is4-space-3: 12px;
    --is4-space-4: 16px;
    --is4-space-6: 24px;
    --is4-space-8: 32px;
    --is4-space-12: 48px;
    --is4-space-16: 64px;
    --is4-space-24: 96px;

    /* Radii */
    --is4-radius-sm: 4px;
    --is4-radius-md: 8px;
    --is4-radius-lg: 16px;
    --is4-radius-pill: 999px;

    /* Elevation */
    --is4-shadow-soft: 0 8px 24px rgba(48, 48, 48, 0.08);
    --is4-shadow-medium: 0 16px 40px rgba(48, 48, 48, 0.14);
    --is4-shadow-strong: 0 24px 64px rgba(48, 48, 48, 0.22);

    /* Motion */
    --is4-transition-fast: 120ms ease-out;
    --is4-transition: 200ms ease-out;
    --is4-transition-slow: 360ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* --- Scope wrapper --- */
.is4 {
    font-family: var(--is4-font-body);
    color: var(--is4-text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.is4 *,
.is4 *::before,
.is4 *::after {
    box-sizing: border-box;
}

/* Stacking rhythm between relaunch sections */
.is4 > * + * {
    margin-top: var(--is4-space-12);
}

/* ==========================================================================
   Section header (eyebrow + title + intro)
   ========================================================================== */
.is4-section__head {
    max-width: 760px;
    margin-bottom: var(--is4-space-8);
}

.is4-section__eyebrow {
    display: inline-block;
    font-family: var(--is4-font-display);
    font-size: var(--is4-type-caption);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--is4-red);
    margin: 0 0 var(--is4-space-3);
}

.is4-section__title {
    font-family: var(--is4-font-display) !important;
    font-size: var(--is4-type-h3) !important;
    line-height: 1.2;
    letter-spacing: 0.02em;
    color: var(--is4-text);
    margin: 0;
}

.is4-section__intro {
    margin: var(--is4-space-4) 0 0;
    font-size: var(--is4-type-lead);
    line-height: 1.4;
    color: var(--is4-text-muted);
}

/* ==========================================================================
   Stepper / progress
   ========================================================================== */
.is4-stepper {
    display: flex;
    align-items: center;
    gap: var(--is4-space-4);
    flex-wrap: wrap;
    margin-bottom: var(--is4-space-8);
}

.is4-stepper__track {
    position: relative;
    flex: 1 1 240px;
    height: 6px;
    border-radius: var(--is4-radius-pill);
    background: var(--is4-white-100);
    overflow: hidden;
}

.is4-stepper__fill {
    position: absolute;
    inset: 0 auto 0 0;
    height: 100%;
    border-radius: var(--is4-radius-pill);
    background: var(--is4-blue);
    transition: width var(--is4-transition-slow);
}

.is4-stepper__label {
    font-family: var(--is4-font-display);
    font-size: var(--is4-type-small);
    letter-spacing: 0.02em;
    color: var(--is4-text-muted);
    white-space: nowrap;
}

.is4-stepper__steps {
    display: flex;
    gap: var(--is4-space-6);
    flex-wrap: wrap;
    list-style: none;
    margin: 0;
    padding: 0;
}

.is4-stepper__step {
    display: flex;
    align-items: center;
    gap: var(--is4-space-2);
    font-family: var(--is4-font-display);
    font-size: var(--is4-type-small);
    color: var(--is4-text-muted);
}

.is4-stepper__step::before {
    content: '';
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--is4-white-100);
}

.is4-stepper__step.is-done::before {
    background: var(--is4-lime);
}

.is4-stepper__step.is-active {
    color: var(--is4-text);
}

.is4-stepper__step.is-active::before {
    background: var(--is4-blue);
    box-shadow: 0 0 0 4px rgba(3, 96, 240, 0.2);
}

/* ==========================================================================
   Offer / pricing comparison cards
   ========================================================================== */
.is4-offer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--is4-space-6);
    align-items: stretch;
}

.is4-offer-card {
    position: relative;
    display: flex;
    flex-direction: column;
    background: var(--is4-purple-50);
    border: 0;
    border-radius: var(--is4-radius-lg);
    padding: var(--is4-space-6);
    box-shadow: var(--is4-shadow-soft);
    transition: transform var(--is4-transition), box-shadow var(--is4-transition);
}

.is4-offer-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--is4-shadow-medium);
}

.is4-offer-card--featured {
    background: var(--is4-purple-200);
}

.is4-offer-card__badge {
    align-self: flex-start;
    display: inline-flex;
    align-items: center;
    font-family: var(--is4-font-display);
    font-size: var(--is4-type-small);
    letter-spacing: 0.02em;
    color: var(--is4-black);
    background: #fff;
    border-radius: 6px;
    padding: 4px 16px;
    margin-bottom: var(--is4-space-6);
}

.is4-offer-card--featured .is4-offer-card__badge {
    background: var(--is4-lime);
}

.is4-offer-card__icon {
    position: absolute;
    top: var(--is4-space-6);
    right: var(--is4-space-6);
    width: 40px;
    height: 40px;
    object-fit: contain;
    margin: 0;
}

span.is4-offer-card__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--is4-black-100);
    opacity: 0.7;
}

.is4-offer-card__name {
    font-family: var(--is4-font-display);
    font-size: 1.5rem;
    line-height: 1.4;
    color: var(--is4-text);
    margin: 0 0 var(--is4-space-2);
}

.is4-offer-card__price {
    font-family: var(--is4-font-display);
    font-size: clamp(2rem, 4vw, 2.5rem);
    line-height: 1;
    letter-spacing: 0.02em;
    color: var(--is4-text);
    margin: 0 0 var(--is4-space-6);
}

.is4-offer-card__price small {
    display: block;
    font-family: var(--is4-font-body);
    font-size: var(--is4-type-caption);
    font-weight: 500;
    line-height: 1.3;
    color: var(--is4-text);
}

.is4-offer-card__price small:first-of-type {
    margin-top: var(--is4-space-2);
}

.is4-offer-card__features {
    list-style: none;
    margin: 0 0 var(--is4-space-6);
    padding: var(--is4-space-6) 0 0;
    border-top: 1px solid rgba(48, 48, 48, 0.12);
    display: flex;
    flex-direction: column;
    gap: var(--is4-space-4);
}

.is4-offer-card__features li {
    position: relative;
    padding-left: var(--is4-space-6);
    font-size: var(--is4-type-body);
    font-weight: 500;
    line-height: 1.5;
    color: var(--is4-text);
}

.is4-offer-card__features li::before {
    content: '\f00c'; /* Font Awesome check */
    font-family: 'Font Awesome 5 Free', 'FontAwesome';
    font-weight: 900;
    position: absolute;
    left: 0;
    top: 4px;
    color: var(--is4-black);
    font-size: var(--is4-type-small);
}

.is4-offer-card__features li:first-child {
    padding-left: 0;
    margin-bottom: var(--is4-space-2);
    font-size: var(--is4-type-body);
    font-weight: 700;
    color: var(--is4-text);
}

.is4-offer-card__features li:first-child::before {
    content: none;
}

.is4-offer-card__features li.is-off {
    color: rgba(48, 48, 48, 0.4);
}

.is4-offer-card__features li.is-off::before {
    content: '\f068'; /* minus */
    color: rgba(48, 48, 48, 0.3);
}

.is4-offer-card__cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--is4-space-2);
    width: 100%;
    margin-top: auto;
    padding: 15px 24px;
    font-family: var(--is4-font-display);
    font-size: var(--is4-type-body);
    text-align: center;
    border-radius: 6px;
    background: transparent;
    color: var(--is4-black) !important;
    border: 1px solid var(--is4-black);
    text-decoration: none;
    cursor: pointer;
    transition: background var(--is4-transition), color var(--is4-transition);
}

.is4-offer-card__cta:hover {
    background: var(--is4-black);
    color: var(--is4-white) !important;
}

.is4-offer-card__cta--ghost {
    border-color: rgba(48, 48, 48, 0.35);
    color: var(--is4-black) !important;
}

.is4-offer-card__cta--ghost:hover {
    background: rgba(48, 48, 48, 0.06);
    color: var(--is4-black) !important;
}

/* ==========================================================================
   Detailvergleich comparison table
   ========================================================================== */
.is4-compare {
    background: var(--is4-surface);
    border: 1px solid var(--is4-border);
    border-radius: var(--is4-radius-lg);
    overflow: hidden;
    box-shadow: var(--is4-shadow-soft);
}

.is4-compare__scroll {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.is4-compare table {
    width: 100%;
    border-collapse: collapse;
    min-width: 560px;
}

.is4-compare thead th {
    position: sticky;
    top: 0;
    z-index: 2;
    background: var(--is4-surface-muted);
    font-family: var(--is4-font-display);
    font-size: var(--is4-type-caption);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--is4-text);
    text-align: center;
    padding: var(--is4-space-4);
    border-bottom: 2px solid var(--is4-border);
}

.is4-compare thead th:first-child {
    text-align: left;
}

.is4-compare tbody th {
    text-align: left;
    font-family: var(--is4-font-body);
    font-weight: 400;
    font-size: var(--is4-type-small);
    color: var(--is4-text);
    padding: var(--is4-space-3) var(--is4-space-4);
}

.is4-compare tbody td {
    text-align: center;
    font-size: var(--is4-type-small);
    color: var(--is4-text-muted);
    padding: var(--is4-space-3) var(--is4-space-4);
    border-left: 1px solid var(--is4-border);
}

.is4-compare tbody tr:nth-child(even) {
    background: rgba(230, 230, 230, 0.35);
}

.is4-compare tbody tr.is4-compare__group th {
    background: var(--is4-black);
    color: var(--is4-white);
    font-family: var(--is4-font-display);
    font-size: var(--is4-type-caption);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: var(--is4-space-2) var(--is4-space-4);
}

.is4-compare__yes {
    color: var(--is4-blue);
    font-weight: 900;
}

.is4-compare__no {
    color: rgba(48, 48, 48, 0.3);
}

.is4-compare__legend {
    display: flex;
    gap: var(--is4-space-6);
    flex-wrap: wrap;
    padding: var(--is4-space-4);
    font-size: var(--is4-type-caption);
    color: var(--is4-text-muted);
    border-top: 1px solid var(--is4-border);
}

.is4-compare__legend span {
    display: inline-flex;
    align-items: center;
    gap: var(--is4-space-2);
}

/* ==========================================================================
   Benefit cards (Vorteile)
   ========================================================================== */
.is4-benefit-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--is4-space-6);
}

.is4-benefit-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--is4-space-3);
    background: var(--is4-lime-100);
    border-radius: var(--is4-radius-lg);
    padding: var(--is4-space-8);
    color: var(--is4-black);
    min-height: 200px;
}

.is4-benefit-card--purple {
    background: var(--is4-purple-200);
}

.is4-benefit-card--rose {
    background: var(--is4-rose-200);
}

.is4-benefit-card__icon {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--is4-black);
}

.is4-benefit-card__title {
    font-family: var(--is4-font-display);
    font-size: var(--is4-type-h4);
    margin: 0;
}

.is4-benefit-card__text {
    font-size: var(--is4-type-small);
    line-height: 1.5;
    color: var(--is4-black-100);
    margin: 0;
}

/* ==========================================================================
   FAQ accordion (Häufige Fragen)
   ========================================================================== */
.is4-faq {
    background: var(--is4-rose-200);
    border-radius: var(--is4-radius-lg);
    padding: clamp(var(--is4-space-8), 4vw, var(--is4-space-16));
}

.is4-faq__list {
    display: flex;
    flex-direction: column;
    gap: var(--is4-space-3);
    max-width: 880px;
}

.is4-faq__item {
    background: var(--is4-white);
    border-radius: var(--is4-radius-md);
    border: 1px solid rgba(48, 48, 48, 0.06);
    overflow: hidden;
}

.is4-faq__item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--is4-space-4);
    cursor: pointer;
    list-style: none;
    padding: var(--is4-space-4) var(--is4-space-6);
    font-family: var(--is4-font-display);
    font-size: var(--is4-type-body);
    color: var(--is4-text);
}

.is4-faq__item summary::-webkit-details-marker {
    display: none;
}

.is4-faq__item summary::after {
    content: '\f067'; /* plus */
    font-family: 'Font Awesome 5 Free', 'FontAwesome';
    font-weight: 900;
    font-size: var(--is4-type-small);
    color: var(--is4-blue);
    transition: transform var(--is4-transition);
}

.is4-faq__item[open] summary::after {
    content: '\f068'; /* minus */
}

.is4-faq__answer {
    padding: 0 var(--is4-space-6) var(--is4-space-4);
    font-size: var(--is4-type-small);
    line-height: 1.6;
    color: var(--is4-text-muted);
}

/* ==========================================================================
   CTA band (LET'S TALK!)
   ========================================================================== */
.is4-cta-band {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--is4-space-8);
    flex-wrap: wrap;
    background: var(--is4-purple);
    border-radius: var(--is4-radius-lg);
    padding: clamp(var(--is4-space-8), 4vw, var(--is4-space-16));
    color: var(--is4-black);
}

.is4-cta-band__body {
    flex: 1 1 320px;
}

.is4-cta-band__title {
    font-family: var(--is4-font-display);
    font-size: var(--is4-type-h3);
    line-height: 1.15;
    margin: 0 0 var(--is4-space-6);
    color: var(--is4-black);
}

.is4-cta-band__actions {
    display: flex;
    gap: var(--is4-space-3);
    flex-wrap: wrap;
}

.is4-cta-band__btn {
    display: inline-flex;
    align-items: center;
    gap: var(--is4-space-2);
    padding: 12px 20px;
    font-family: var(--is4-font-display);
    font-size: var(--is4-type-small);
    border-radius: var(--is4-radius-pill);
    text-decoration: none;
    background: var(--is4-blue);
    color: var(--is4-white) !important;
    border: 1px solid transparent;
    transition: background var(--is4-transition);
}

.is4-cta-band__btn:hover {
    background: var(--is4-blue-100);
}

.is4-cta-band__btn--ghost {
    background: transparent;
    border-color: var(--is4-black);
    color: var(--is4-black) !important;
}

.is4-cta-band__btn--ghost:hover {
    background: rgba(48, 48, 48, 0.08);
}

.is4-cta-band__mark {
    font-family: var(--is4-font-display);
    font-size: clamp(2rem, 6vw, 4rem);
    line-height: 0.95;
    letter-spacing: 0.02em;
    color: var(--is4-black);
    text-transform: uppercase;
    flex: 0 0 auto;
}

/* ==========================================================================
   Footer band (dark)
   ========================================================================== */
.is4-footer-band {
    background: var(--is4-black);
    color: var(--is4-white);
    border-radius: var(--is4-radius-lg);
    padding: clamp(var(--is4-space-8), 4vw, var(--is4-space-16));
}

.is4-footer-band__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--is4-space-8);
}

.is4-footer-band__col-title {
    font-family: var(--is4-font-display);
    font-size: var(--is4-type-caption);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--is4-white-100);
    margin: 0 0 var(--is4-space-4);
}

.is4-footer-band__links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--is4-space-2);
}

.is4-footer-band__links a {
    color: var(--is4-white) !important;
    text-decoration: none;
    font-size: var(--is4-type-small);
    transition: color var(--is4-transition);
}

.is4-footer-band__links a:hover {
    color: var(--is4-red-100) !important;
}

.is4-footer-band__bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--is4-space-6);
    flex-wrap: wrap;
    margin-top: var(--is4-space-12);
    padding-top: var(--is4-space-6);
    border-top: 1px solid rgba(249, 249, 249, 0.12);
}

.is4-footer-band__logo {
    height: 36px;
    width: auto;
}

.is4-footer-band__copy {
    font-size: var(--is4-type-caption);
    color: var(--is4-white-100);
    margin: 0;
}

/* ==========================================================================
   Responsive & accessibility
   ========================================================================== */
@media (max-width: 575.98px) {
    .is4-cta-band {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (prefers-reduced-motion: reduce) {
    .is4 *,
    .is4 *::before,
    .is4 *::after {
        transition: none !important;
    }
}