/* ============================================================
   BOT DETAIL PAGE — White + Dark Navy Theme
   bot-detail.css  –  DTU AUV
   Bot starts RIGHT + enlarged, moves on scroll
   ============================================================ */

:root {
    --bd-white: #f7f8fa;
    --bd-offwhite: #eef0f4;
    --bd-navy: #0c1a3a;
    --bd-navy-light: #152550;
    --bd-navy-muted: #2a3d6b;
    --bd-accent: #ff6348;
    --bd-text: #0c1a3a;
    --bd-text-muted: #5a6a8a;
    --bd-border: #d8dce6;
}

/* ── Body & Navbar overrides ──────────────────────────────── */
body.bot-detail-page {
    background: var(--bd-white);
    color: var(--bd-text);
}
body.bot-detail-page .navbar {
    background: rgba(247, 248, 250, 0.92);
    border-bottom-color: var(--bd-border);
    backdrop-filter: blur(20px);
}
body.bot-detail-page .navbar.scrolled {
    box-shadow: 0 2px 24px rgba(12, 26, 58, 0.06);
}
body.bot-detail-page .nav-logo { color: var(--bd-navy); }
body.bot-detail-page .nav-links a { color: var(--bd-text-muted); }
body.bot-detail-page .nav-links a:hover,
body.bot-detail-page .nav-links a.active { color: var(--bd-navy); }
body.bot-detail-page .nav-links a::after { background: var(--bd-accent); }
body.bot-detail-page .nav-search {
    background: rgba(12, 26, 58, 0.04);
    border-color: var(--bd-border);
}
body.bot-detail-page .nav-search input { color: var(--bd-navy); }
body.bot-detail-page .nav-search input::placeholder { color: var(--bd-text-muted); }
body.bot-detail-page .search-btn { color: var(--bd-text-muted); }

/* ============================================================
   PRELOADER
   ============================================================ */
.bot-preloader {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: var(--bd-white);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}
.bot-preloader.done {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}
.preloader-inner {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}
.preloader-ring {
    width: 48px;
    height: 48px;
    border: 3px solid var(--bd-border);
    border-top-color: var(--bd-navy);
    border-radius: 50%;
    animation: preloaderSpin 0.8s linear infinite;
}
@keyframes preloaderSpin {
    to { transform: rotate(360deg); }
}
.preloader-text {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--bd-text-muted);
}
.preloader-bar {
    width: 180px;
    height: 3px;
    border-radius: 3px;
    background: var(--bd-border);
    overflow: hidden;
}
.preloader-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--bd-navy), var(--bd-navy-muted));
    border-radius: 3px;
    transition: width 0.15s ease;
}

/* ============================================================
   HERO — Split layout (text left, bot right)
   ============================================================ */
.bot-hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--bd-white);
}

/* Subtle grid background */
.bot-hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}
.hero-grid-lines {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(12, 26, 58, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(12, 26, 58, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

/* Hero content — left side text */
.bot-hero-content {
    position: relative;
    z-index: 5;
    width: 100%;
    max-width: 1300px;
    margin: 0 auto;
    padding: 120px 5% 60px;
}
.hero-left {
    max-width: 520px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    opacity: 0;
    animation: heroSlideIn 0.9s ease forwards 0.4s;
}
@keyframes heroSlideIn {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--bd-text-muted);
    transition: color 0.25s;
    width: fit-content;
}
.back-link:hover { color: var(--bd-accent); }

.hero-gen {
    font-size: 0.65rem;
    font-weight: 800;
    letter-spacing: 6px;
    text-transform: uppercase;
    color: var(--bd-navy);
    padding: 6px 16px;
    border: 1.5px solid var(--bd-navy);
    border-radius: 100px;
    width: fit-content;
}
.hero-title {
    font-family: 'Inter', sans-serif;
    font-size: clamp(2.8rem, 6vw, 5rem);
    font-weight: 900;
    letter-spacing: -2px;
    line-height: 1.05;
    color: var(--bd-navy);
}
.hero-tagline {
    font-size: 0.95rem;
    color: var(--bd-text-muted);
    line-height: 1.7;
    max-width: 400px;
}
.hero-cta {
    display: inline-flex;
    align-items: center;
    padding: 14px 32px;
    background: var(--bd-navy);
    color: #fff;
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 2px;
    border-radius: 6px;
    width: fit-content;
    text-decoration: none;
    transition: transform 0.25s, box-shadow 0.25s;
    box-shadow: 0 4px 20px rgba(12, 26, 58, 0.15);
}
.hero-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(12, 26, 58, 0.25);
}

/* Hero stats row */
.hero-stats {
    display: flex;
    align-items: center;
    gap: 28px;
    margin-top: 16px;
}
.hero-stat {
    display: flex;
    align-items: center;
    gap: 12px;
}
.hero-stat-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: 1.5px solid var(--bd-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bd-text-muted);
    font-size: 0.85rem;
}
.hero-stat-val {
    display: block;
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--bd-navy);
    line-height: 1.2;
}
.hero-stat-lbl {
    display: block;
    font-size: 0.65rem;
    font-weight: 500;
    color: var(--bd-text-muted);
    letter-spacing: 0.5px;
}
.hero-stat-divider {
    width: 1px;
    height: 40px;
    background: var(--bd-border);
}

/* Scroll cue */
.scroll-cue {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    z-index: 5;
}
.scroll-cue span {
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--bd-text-muted);
    opacity: 0.5;
}
.scroll-cue-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--bd-navy), transparent);
    animation: scrollCuePulse 2s ease-in-out infinite;
}
@keyframes scrollCuePulse {
    0%, 100% { opacity: 1; transform: scaleY(1); }
    50%      { opacity: 0.3; transform: scaleY(0.5); }
}

/* ============================================================
   SCROLL STAGE — Sticky "frozen" viewport
   Outer container is tall (5 × 100vh) to create scroll room.
   Inner .stage-sticky locks to the screen so nothing visually moves.
   JS crossfades .sp-content panels based on scroll progress.
   ============================================================ */
.bot-scroll-stage {
    position: relative;
    z-index: 2;
    height: 350vh;                          /* 5 panels — tighter scroll */
}

/* Sticky viewport — locks to screen */
.stage-sticky {
    position: sticky;
    top: 0;
    height: 100vh;
    width: 100%;
    overflow: hidden;
    display: flex;
    align-items: center;
    background: var(--bd-white);
}

/* Grid background inside the sticky frame */
.stage-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

/* ── Bot canvas — right side, vertically centred ────────── */
.stage-bot {
    position: absolute;
    z-index: 2;
    right: 10%;
    top: 50%;
    transform: translateY(-50%);
    width: min(48vw, 700px);
    height: min(48vw, 700px);
    pointer-events: none;
    filter: drop-shadow(0 8px 40px rgba(12, 26, 58, 0.18));
    zoom: 120%;
}
#bot-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

/* ── Text region — left side ────────────────────────────── */
.stage-text {
    position: relative;
    z-index: 5;
    width: 46%;
    padding-left: 6%;
    height: 100%;                           /* fill sticky viewport */
}

/* All panels stacked on top of each other */
.sp-content {
    position: absolute;
    top: 50%;
    left: 45%;
    transform: translateY(-50%);
    max-width: 440px;
    opacity: 0;
    transition: opacity 0.5s ease, transform 0.5s ease;
    pointer-events: none;
}
.sp-content.active {
    opacity: 1;
    transform: translateY(-50%);
    pointer-events: auto;
}

/* Tag */
.sp-tag {
    display: inline-block;
    font-size: 0.62rem;
    font-weight: 800;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--bd-accent);
    margin-bottom: 16px;
}

/* Headings */
.sp-content h2 {
    font-family: 'Playfair Display', serif;
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 800;
    color: var(--bd-navy);
    line-height: 1.15;
    margin-bottom: 16px;
}
.sp-content p {
    font-size: 0.9rem;
    line-height: 1.8;
    color: var(--bd-text-muted);
    margin-bottom: 24px;
}

/* Inline specs row */
.sp-specs-row {
    display: flex;
    gap: 28px;
    flex-wrap: wrap;
}
.sp-spec {
    display: flex;
    flex-direction: column;
    gap: 3px;
}
.sp-spec-val {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--bd-navy);
}
.sp-spec-lbl {
    font-size: 0.6rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--bd-text-muted);
}

/* ── Panel indicator dots — right edge ──────────────────── */
.stage-dots {
    position: absolute;
    z-index: 10;
    right: 28px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.stage-dots .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--bd-border);
    transition: background 0.35s ease, transform 0.35s ease;
}
.stage-dots .dot.active {
    background: var(--bd-navy);
    transform: scale(1.35);
}

/* ── Feature bullet list inside panels ──────────────────── */
.sp-features {
    list-style: none;
    padding: 0;
    margin: 0 0 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.sp-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--bd-text-muted);
    line-height: 1.5;
}
.sp-features li i {
    color: var(--bd-accent);
    font-size: 0.72rem;
    flex-shrink: 0;
    width: 16px;
    text-align: center;
}

/* ── Panel counter (01 / 05) — bottom-left ──────────────── */
.stage-counter {
    position: absolute;
    z-index: 10;
    bottom: 36px;
    left: 6%;
    display: flex;
    align-items: baseline;
    gap: 4px;
    font-family: 'Inter', sans-serif;
}
.counter-current {
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--bd-navy);
    transition: opacity 0.3s ease;
}
.counter-sep {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--bd-border);
    margin: 0 2px;
}
.counter-total {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--bd-text-muted);
}

/* ── Scroll progress bar — bottom edge ──────────────────── */
.stage-progress {
    position: absolute;
    z-index: 10;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--bd-border);
}
.stage-progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--bd-accent), var(--bd-navy));
    border-radius: 0 3px 3px 0;
    transition: width 0.15s ease;
}

/* ── Decorative elements ────────────────────────────────── */
.stage-decor {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    overflow: hidden;
}
.decor-ring {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(12, 26, 58, 0.04);
}
.decor-ring--1 {
    width: 500px;
    height: 500px;
    right: -80px;
    bottom: -120px;
}
.decor-ring--2 {
    width: 300px;
    height: 300px;
    right: 20px;
    bottom: -20px;
}
.decor-line {
    position: absolute;
    background: rgba(12, 26, 58, 0.03);
}
.decor-line--h {
    top: 50%;
    left: 0;
    width: 100%;
    height: 1px;
}
.decor-line--v {
    top: 0;
    left: 46%;
    width: 1px;
    height: 100%;
}

/* ============================================================
   PDF DOWNLOAD BANNER
   ============================================================ */
.pdf-download-section {
    padding: 60px 6%;
    background: var(--bd-offwhite);
    text-align: center;
    border-top: 1px solid var(--bd-border);
    border-bottom: 1px solid var(--bd-border);
}
.pdf-download-inner {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}
.pdf-download-inner p {
    font-size: 0.95rem;
    color: var(--bd-text-muted);
    line-height: 1.6;
}
.btn-download-pdf {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: 6px;
    background: var(--bd-accent);
    color: #fff;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: transform 0.25s, box-shadow 0.25s, background 0.25s;
    box-shadow: 0 4px 20px rgba(255, 99, 72, 0.25);
}
.btn-download-pdf:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(255, 99, 72, 0.35);
    background: #e5573e;
}
.btn-download-pdf i {
    font-size: 1rem;
}

/* ============================================================
   SPEC TABLE — Dark navy section
   ============================================================ */
.spec-table-section {
    padding: 120px 6% 80px;
    background: var(--bd-navy);
}
.spec-table-container {
    max-width: 860px;
    margin: 0 auto;
}
.spec-header {
    margin-bottom: 48px;
}
.spec-header h2 {
    font-family: 'Playfair Display', serif;
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 800;
    color: #fff;
    margin-top: 10px;
}

.spec-table {
    display: flex;
    flex-direction: column;
}
.spec-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
    border-bottom: 1px solid rgba(255,255,255,0.07);
    transition: background 0.2s;
}
.spec-row:hover {
    background: rgba(255,255,255,0.02);
}
.spec-row--highlight {
    background: rgba(255,99,72,0.06);
    border-left: 3px solid var(--bd-accent);
    padding-left: 16px;
    margin-left: -16px;
    margin-right: -16px;
    padding-right: 16px;
    border-radius: 4px;
}
.spec-key {
    font-size: 0.82rem;
    font-weight: 500;
    color: rgba(255,255,255,0.5);
    flex: 1;
}
.spec-val {
    font-size: 0.85rem;
    font-weight: 700;
    color: #fff;
    text-align: right;
    flex: 1;
}

/* ============================================================
   SUBSYSTEMS — White section
   ============================================================ */
.subsystems-section {
    padding: 100px 6%;
    background: var(--bd-white);
}
.subsystems-container {
    max-width: 1100px;
    margin: 0 auto;
}
.subsystems-section .spec-header h2 {
    color: var(--bd-navy);
}
.subsystem-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
}
.sub-card {
    background: #fff;
    border: 1px solid var(--bd-border);
    border-radius: 20px;
    padding: 32px 28px;
    transition: border-color 0.3s, box-shadow 0.3s, transform 0.3s;
}
.sub-card:hover {
    border-color: var(--bd-navy);
    box-shadow: 0 8px 30px rgba(12, 26, 58, 0.08);
    transform: translateY(-4px);
}
.sub-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: var(--bd-offwhite);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bd-navy);
    font-size: 1.1rem;
    margin-bottom: 18px;
}
.sub-card h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--bd-navy);
    margin-bottom: 8px;
}
.sub-card p {
    font-size: 0.8rem;
    line-height: 1.7;
    color: var(--bd-text-muted);
}

/* ============================================================
   CTA — Navy section
   ============================================================ */
.bot-cta {
    padding: 100px 6%;
    background: var(--bd-navy);
    text-align: center;
}
.bot-cta-inner {
    max-width: 500px;
    margin: 0 auto;
}
.bot-cta h2 {
    font-family: 'Playfair Display', serif;
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    color: #fff;
    margin-bottom: 12px;
}
.bot-cta p {
    font-size: 0.88rem;
    color: rgba(255,255,255,0.4);
    margin-bottom: 28px;
    line-height: 1.7;
}
.btn-back-fleet {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: 6px;
    background: #fff;
    color: var(--bd-navy);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.25s, box-shadow 0.25s;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}
.btn-back-fleet:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.15);
}

/* ============================================================
   FOOTER override for this page (dark)
   ============================================================ */
body.bot-detail-page .footer {
    background: #080e1e;
    border-top: 1px solid rgba(255,255,255,0.05);
}

/* ============================================================
   ANIMATIONS — anim-fade-up
   ============================================================ */
.anim-fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.8s cubic-bezier(0.22,1,0.36,1);
}
.anim-fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
    .subsystem-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .hero-title {
        font-size: clamp(2.2rem, 5vw, 3.5rem);
    }
}

@media (max-width: 768px) {
    .bot-hero { min-height: auto; padding-bottom: 40px; }
    .bot-hero-content { padding: 100px 5% 40px; }
    .hero-left { max-width: 100%; }
    .hero-title { font-size: 2.4rem; letter-spacing: -1px; }

    /* Stack vertically on mobile */
    .bot-scroll-stage { height: 300vh; }     /* less scroll room */
    .stage-sticky { flex-direction: column; }

    .stage-bot {
        position: relative;
        right: auto;
        top: auto;
        transform: none;
        width: 55vw;
        height: 55vw;
        margin: 12vh auto 0;
    }

    .stage-text { width: 100%; padding: 0 5%; }
    .sp-content {
        left: 5%;
        right: 5%;
        top: auto;
        bottom: 8%;
        transform: none;
        max-width: 100%;
    }
    .sp-content.active { transform: none; }

    .stage-dots {
        flex-direction: row;
        top: auto;
        bottom: 16px;
        right: 50%;
        transform: translateX(50%);
    }

    .subsystem-grid {
        grid-template-columns: 1fr;
    }
    .spec-table-section,
    .subsystems-section {
        padding: 80px 5%;
    }

    .hero-stats { flex-wrap: wrap; gap: 16px; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 2rem; }
    .hero-cta { padding: 12px 24px; font-size: 0.7rem; }
    .sp-content h2 { font-size: 1.5rem !important; }
    .sp-specs-row { gap: 16px; }
}