/* ===================== PASSWORD GATE ===================== */
.pw-gate {
    position: fixed;
    inset: 0;
    background: #000;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pw-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    width: 320px;
}

.pw-logo {
    height: 40px;
    opacity: 0.2;
    filter: grayscale(100%);
    transition: opacity 0.3s ease, filter 0.3s ease;
}

.pw-logo:hover {
    opacity: 1;
    filter: grayscale(0%);
}

.pw-label {
    font-family: "Jersey 10", sans-serif;
    font-size: 1rem;
    letter-spacing: 4px;
    color: #555;
    text-transform: uppercase;
    text-align: center;
}

.pw-row {
    display: flex;
    width: 100%;
    border: 1px solid #222;
}

.pw-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: #fff;
    font-family: "Jersey 10", sans-serif;
    font-size: 1.2rem;
    letter-spacing: 4px;
    padding: 14px 16px;
    caret-color: #fff;
}

.pw-input::placeholder { color: #333; }

.pw-btn {
    background: transparent;
    border: none;
    border-left: 1px solid #222;
    color: #fff;
    font-family: "Jersey 10", sans-serif;
    font-size: 1.4rem;
    padding: 14px 20px;
    cursor: pointer;
    transition: background 0.2s;
}

.pw-btn:hover { background: #111; }

.pw-error {
    font-family: "Jersey 10", sans-serif;
    font-size: 0.9rem;
    letter-spacing: 3px;
    color: #c0392b;
    text-transform: uppercase;
    min-height: 1em;
    text-align: center;
}

/* hide page content while gate is active */
body.pw-active > *:not(.pw-gate) {
    visibility: hidden;
}

/* ===================== RESET ===================== */
* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
    background: #000;
    color: #fff;
    font-family: "Jersey 10", sans-serif;
    font-size: 12px;
    letter-spacing: 2px;
    min-height: 100%;
    overflow-x: hidden;
    width: 100%;
}

/* ===================== TOPBAR ===================== */
.topbar {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    padding: 20px 5%;
    background: #000;
    text-align: left;
}

.topbar.scrolled {
    position: fixed;
    top: 0;
    bottom: auto;
}

.topbar-link {
    color: #fff;
    text-decoration: none;
    font-size: 1rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    opacity: 0.35;
    transition: opacity 0.2s ease;
}

.topbar-link:hover { opacity: 1; }

.topbar-link:last-child { text-align: right; }

.brand-logo {
    height: 36px;
    opacity: 0.2;
    filter: grayscale(100%);
    transition: opacity 0.3s ease, filter 0.3s ease;
}

.brand-logo:hover {
    opacity: 1;
    filter: grayscale(0%);
}

.back {
    position: absolute;
    left: 5%;
    color: #fff;
    text-decoration: none;
    font-size: 1rem;
    letter-spacing: 2px;
    transition: color 0.2s;
}

.back:hover { color: #888; }

/* ===================== HERO ===================== */
.rtr-hero {
    min-height: 100vh;
    min-height: 100svh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 80px 5%;
    border-bottom: none;
    position: relative;
    overflow: hidden;
}

/* SLIDESHOW */
.rtr-slideshow {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.rtr-slideshow::after {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.72);
    z-index: 1;
}

.rtr-slide {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: top center;
    -webkit-background-size: cover;
    opacity: 0;
    animation: rtrFade 20s infinite;
}

.rtr-slide-1 { background-image: url('asset/img_rtr/sketch_01.jpg'); animation-delay: 0s; }
.rtr-slide-2 { background-image: url('asset/img_rtr/sketch_02.jpg'); animation-delay: 5s; }
.rtr-slide-3 { background-image: url('asset/img_rtr/render_01.jpg'); animation-delay: 10s; }
.rtr-slide-4 { background-image: url('asset/img_rtr/render_02.jpg'); animation-delay: 15s; }

@keyframes rtrFade {
    0%   { opacity: 0; }
    5%   { opacity: 1; }
    20%  { opacity: 1; }
    25%  { opacity: 0; }
    100% { opacity: 0; }
}

.rtr-hero-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 360px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
}

.rtr-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 255px;
    margin: 0 auto 24px;
}

.rtr-logo {
    width: 100%;
    height: auto;
    display: block;
    margin-bottom: 12px;    
    align-self: center;
}

.rtr-wordmark {
    font-size: 1rem;
    letter-spacing: 12.5px;
    color: #fff;
    text-transform: uppercase;
    white-space: nowrap;
    text-align: center;
}

.rtr-desc {
    font-size: 1.3rem;
    color: #ccc;
    max-width: 480px;
    line-height: 1.5;
    letter-spacing: 1px;
    margin-bottom: 72px;
    text-align: center;
}

/* STEPS */
.rtr-steps {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
    justify-content: center;
    position: absolute;
    bottom: 110px;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    z-index: 2;
}

.rtr-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    border: 1px solid #222;
    padding: 20px 32px;
}

.step-num {
    font-size: 2rem;
    color: #333;
    line-height: 1;
}

.step-label {
    font-size: 1rem;
    color: #fff;
    letter-spacing: 3px;
}

.rtr-arrow {
    font-size: 1.5rem;
    color: #333;
}

/* ===================== SECTION BASE ===================== */
section {
    padding: 80px 5%;
    border-bottom: 1px solid #1a1a1a;
}

.section-header {
    margin-bottom: 48px;
}

.tag {
    display: inline-block;
    font-size: 0.85rem;
    letter-spacing: 4px;
    color: #555;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.section-header h2 {
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 400;
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.section-header p {
    font-size: 1.3rem;
    color: #888;
    letter-spacing: 1px;
    max-width: 480px;
}

/* IMAGE PLACEHOLDER LABEL */
.img-label {
    position: absolute;
    bottom: 12px;
    left: 12px;
    background: rgba(0,0,0,0.7);
    color: #555;
    font-size: 0.8rem;
    letter-spacing: 1px;
    padding: 4px 8px;
    pointer-events: none;
}

/* ===================== SKETCHES ===================== */
.section-sketches {
    padding: 0;
}

.sketch-header-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 4px;
}


.sketch-banner {
    grid-column: 1 / -1;
    grid-row: 1;
    background-color: #0d0d0d;
    background-size: cover;
    background-position: center;
    position: relative;
    filter: grayscale(100%);
    overflow: hidden;
    transition: filter 0.4s ease;
    min-height: clamp(280px, 38vw, 680px);
}

.sketch-banner:hover { filter: grayscale(0%); }

.sketch-banner-header {
    grid-column: 1 / span 2;
    grid-row: 1;
    z-index: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 12px;
    padding: 48px;
    min-height: clamp(280px, 38vw, 680px);
}

.sketch-banner-header .tag {
    color: #555;
    margin-bottom: 0;
}

.sketch-banner-header h2 {
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 400;
    letter-spacing: 2px;
    margin-bottom: 0;
}

.sketch-banner-header p {
    font-size: 1.3rem;
    color: #888;
    letter-spacing: 1px;
    max-width: 480px;
    line-height: 1.5;
}

.sketch-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
}

.sketch-item {
    position: relative;
    aspect-ratio: 3/4;
    background-color: #0d0d0d;
    background-size: cover;
    background-position: center;
    overflow: hidden;
}

/* ===================== CONCEPT ===================== */
.concept-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4px;
}

.concept-item {
    position: relative;
    background-color: #0d0d0d;
    background-size: cover;
    background-position: center;
    border: 1px solid #1a1a1a;
    overflow: hidden;
}

.concept-main { aspect-ratio: 16/9; }
.concept-item:not(.concept-main) { aspect-ratio: unset; }

/* ===================== RENDER ===================== */
.render-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 4px;
}

.render-item {
    position: relative;
    aspect-ratio: 3/4;
    background-color: #0d0d0d;
    background-size: cover;
    background-position: center;
    border: 1px solid #1a1a1a;
    overflow: hidden;
    transition: transform 0.4s ease;
}

.render-item:hover {
    transform: scale(1.02);
    z-index: 1;
}

/* ===================== VERGLEICH ===================== */
.compare-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 24px;
    align-items: center;
}

.compare-item {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.compare-img {
    position: relative;
    aspect-ratio: 4/3;
    background-color: #0d0d0d;
    background-size: cover;
    background-position: center;
    border: 1px solid #1a1a1a;
    overflow: hidden;
}

.compare-item:first-child .compare-img {
    filter: grayscale(80%) brightness(0.7);
}

.compare-label {
    font-size: 0.85rem;
    letter-spacing: 6px;
    color: #555;
    text-align: center;
}

.compare-divider {
    font-size: 2rem;
    color: #333;
    text-align: center;
    letter-spacing: 4px;
}

/* ===================== CTA ===================== */
.rtr-cta {
    padding: 0;
    border-bottom: 1px solid #1a1a1a;
}

.rtr-cta-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
}

.rtr-cta-panel {
    grid-column: span 2;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 12px;
    padding: 48px;
}

.rtr-cta-image {
    grid-column: span 2;
    background-size: cover;
    background-position: center;
    background-color: #0d0d0d;
    min-height: clamp(280px, 38vw, 680px);
}

.rtr-cta-lead {
    font-size: clamp(2rem, 5vw, 4rem);
    letter-spacing: 2px;
    color: #fff;
    font-weight: 400;
    margin-bottom: 0;
}

.rtr-cta-text {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 40px;
}

.rtr-cta-text p {
    font-size: 1.2rem;
    color: #999;
    letter-spacing: 1px;
    line-height: 1.4;
}

.rtr-cta-btn {
    display: block;
    width: 320px;
    border: 1px solid #fff;
    color: #fff;
    text-decoration: none;
    font-family: "Jersey 10", sans-serif;
    font-size: 1rem;
    letter-spacing: 4px;
    text-transform: uppercase;
    padding: 18px 36px;
    text-align: center;
    transition: background 0.3s ease, color 0.3s ease;
}

.rtr-cta-btn:hover {
    background: #fff;
    color: #000;
}

/* ===================== FOOTER ===================== */
.footer {
    padding: 40px 5%;
    display: flex;
    justify-content: center;
    gap: 50px;
    flex-wrap: wrap;
}

.footer a {
    color: #fff;
    text-decoration: none;
    transition: color 0.2s;
}

.footer a:hover { color: #8b5cf6; }

/* ===================== MOBILE ===================== */
@media (max-width: 800px) {
    * { max-width: 100%; }
    .rtr-wordmark { white-space: normal; }
    .rtr-cta-btn { width: 100%; box-sizing: border-box; }
    .pw-input { font-size: 16px; }
    .sketch-header-row { display: flex; flex-direction: column; }
    .sketch-banner { display: block; min-height: 60vw; background-image: url('asset/img_rtr/sketch_banner_mobil.jpg') !important; filter: none; transition: none; }
    .sketch-banner:hover { filter: none; }
    .sketch-banner-header { min-height: auto; padding: 140px 80px; }
    .rtr-cta-row { grid-template-columns: 1fr; }
    .rtr-cta-image { grid-column: span 1; min-height: 280px; }
    .sketch-grid, .render-grid { grid-template-columns: repeat(2, 1fr); }
    .concept-grid { grid-template-columns: 1fr; }
    .compare-grid { grid-template-columns: 1fr; }
    .compare-divider { transform: rotate(90deg); }
    .rtr-steps { gap: 12px; }
    .rtr-arrow { transform: rotate(90deg); }
    .footer { gap: 20px; flex-direction: column; text-align: center; }
}