html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body.single-page {
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
}
button, a { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }

.material-symbols-outlined {
    font-variation-settings: 'FILL' 0, 'wght' 300, 'GRAD' 0, 'opsz' 24;
}

.scroll-progress {
    position: fixed; top: 0; left: 0;
    height: 3px; width: 0%;
    background: linear-gradient(90deg, var(--color-accent), #5CC8F0);
    z-index: 999;
    box-shadow: 0 0 12px var(--color-accent-glow);
}

/* Dim bg 50% */
.bg-dim {
    position: fixed;
    inset: 0;
    background: rgba(11, 20, 38, 0.5);
    z-index: 1;
    pointer-events: none;
}

.float-ico {
    position: absolute;
    color: var(--color-accent);
    opacity: 0.08;
    pointer-events: none;
    will-change: transform;
    font-size: 80px !important;
}

.scene {
    position: relative;
    display: flex;
    align-items: center;
    padding: 80px 24px 40px;
    z-index: 2;
}
.scene-1 { padding-top: 110px; }
.scene-inner {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    position: relative;
}

.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(.2,.8,.2,1), transform 0.8s cubic-bezier(.2,.8,.2,1);
}
.reveal.in { opacity: 1; transform: none; }
.d1 { transition-delay: 0.1s; }
.d2 { transition-delay: 0.2s; }
.d3 { transition-delay: 0.3s; }
.d4 { transition-delay: 0.4s; }
.d5 { transition-delay: 0.5s; }

/* ===== Hero block ===== */
.hero-block {
    text-align: center;
    margin-bottom: 36px;
}
.hero-title {
    font-size: clamp(2.8rem, 8vw, 6.5rem);
    font-weight: 900;
    line-height: 0.95;
    letter-spacing: -0.04em;
    background: linear-gradient(135deg, #fff 0%, var(--color-accent-light) 60%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 24px;
}
.hero-title .nowrap { white-space: nowrap; }
.hero-title .exclaim {
    color: var(--color-accent);
    -webkit-text-fill-color: var(--color-accent);
    display: inline-block;
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}
.hero-lead {
    position: relative;
    font-size: clamp(1.4rem, 2.6vw, 2.1rem);
    color: var(--color-text-primary);
    max-width: 920px;
    margin: 0 auto;
    line-height: 1.4;
    font-weight: 500;
    padding: 36px 40px;
    border-radius: 20px;
    background:
        linear-gradient(135deg, rgba(51,181,229,0.08) 0%, rgba(51,181,229,0.02) 50%, rgba(51,181,229,0.06) 100%),
        linear-gradient(180deg, rgba(15,28,50,0.6), rgba(11,20,38,0.4));
    border: 1px solid transparent;
    background-clip: padding-box;
    box-shadow:
        0 20px 60px rgba(0,0,0,0.35),
        0 0 0 1px rgba(51,181,229,0.2) inset;
    overflow: hidden;
    isolation: isolate;
}
/* Gradient border ring */
.hero-lead::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 20px;
    padding: 1px;
    background: linear-gradient(135deg, var(--color-accent) 0%, transparent 40%, transparent 60%, var(--color-accent-light) 100%);
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
            mask-composite: exclude;
    pointer-events: none;
    z-index: 1;
}
/* Radial glow behind */
.hero-lead::after {
    content: '';
    position: absolute;
    top: 50%; left: 50%;
    width: 120%; height: 200%;
    transform: translate(-50%, -50%);
    background: radial-gradient(ellipse at center, var(--color-accent-glow) 0%, transparent 60%);
    filter: blur(60px);
    opacity: 0.4;
    z-index: -1;
    pointer-events: none;
}
.hero-lead strong {
    color: var(--color-accent-light);
    font-weight: 700;
}
.hero-lead .sps-mark {
    display: inline-block;
    background: linear-gradient(135deg, var(--color-accent), #1a8bb5);
    color: #fff;
    font-weight: 800;
    padding: 2px 12px;
    border-radius: 8px;
    letter-spacing: 0.02em;
    box-shadow: 0 6px 20px var(--color-accent-glow);
    margin-right: 4px;
    vertical-align: baseline;
}

/* ===== Feature list (no cards) ===== */
.features {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
}
.feature-row {
    display: grid;
    grid-template-columns: 72px 1fr;
    gap: 24px;
    align-items: start;
    padding: 18px 0;
    border-bottom: 1px solid var(--color-border);
}
.feature-row:last-child { border-bottom: none; }
.feature-row .icon-wrap {
    display: grid;
    place-items: center;
}
.feature-row .material-symbols-outlined {
    font-size: 56px;
    color: var(--color-accent);
    font-variation-settings: 'FILL' 0, 'wght' 300;
    filter: drop-shadow(0 4px 20px var(--color-accent-glow));
}
.feature-row .num {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.25em;
    color: var(--color-accent);
    margin-bottom: 6px;
}
.feature-row h3 {
    font-size: clamp(1.6rem, 2.8vw, 2.1rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}
.feature-row p {
    font-size: clamp(1.25rem, 1.9vw, 1.6rem);
    color: var(--color-text-secondary);
    line-height: 1.55;
    font-weight: 400;
    letter-spacing: -0.005em;
}
.feature-row strong { color: var(--color-accent-light); }

/* Video button */
.video-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 14px 28px;
    background: linear-gradient(135deg, var(--color-accent), #1a8bb5);
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    border-radius: 12px;
    box-shadow: 0 10px 30px var(--color-accent-glow);
    transition: transform 0.2s;
    cursor: pointer;
    border: none;
    font-family: inherit;
}
.video-btn:hover { transform: scale(1.04); }
.video-btn .material-symbols-outlined {
    font-size: 24px;
    font-variation-settings: 'FILL' 1;
}

/* ===== Chat ===== */
.chat-head-block {
    text-align: center;
    margin-bottom: 24px;
}
.chat-head-block h2 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
}
.chat-head-block h2 .hl {
    background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.chat-head-block p {
    color: var(--color-text-secondary);
    font-size: clamp(1.15rem, 1.8vw, 1.4rem);
}

.oyl-chat {
    max-width: 900px;
    margin: 0 auto;
    padding: 0;
}
.oyl-chat-head {
    display: flex;
    align-items: center;
    gap: 14px;
    padding-bottom: 18px;
    margin-bottom: 0;
}
.oyl-chat-head .avatar {
    width: 48px; height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-accent), #1a8bb5);
    display: grid; place-items: center;
    color: #fff;
    box-shadow: 0 8px 24px var(--color-accent-glow);
    flex-shrink: 0;
}
.oyl-chat-head .avatar .material-symbols-outlined {
    font-size: 26px;
    font-variation-settings: 'FILL' 1;
}
.oyl-chat-head .meta {
    display: flex;
    align-items: baseline;
    gap: 12px;
    flex-wrap: wrap;
}
.oyl-chat-head h3 { font-size: 1.2rem; }
.oyl-chat-head .status {
    font-size: 0.85rem;
    color: #4ade80;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.oyl-chat-head .status::before {
    content: ''; width: 8px; height: 8px;
    border-radius: 50%; background: #4ade80;
    box-shadow: 0 0 8px #4ade80;
    animation: blink 1.5s infinite;
}

/* Questions - chip grid */
.oyl-questions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 0;
}
.qa-item { flex: 1 1 100%; }
.oyl-q {
    text-align: left;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: var(--color-text-primary);
    cursor: pointer;
    font-size: 0.98rem;
    font-family: inherit;
    font-weight: 500;
    border-radius: 999px;
    transition: all 0.25s;
    line-height: 1.35;
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    backdrop-filter: blur(6px);
}
.oyl-q .q-ico {
    font-size: 20px;
    color: var(--color-accent);
    flex-shrink: 0;
    transition: transform 0.3s;
}
.oyl-q .q-text { flex: 1; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.oyl-q:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(51,181,229,0.15);
}
.oyl-q:hover .q-ico { transform: scale(1.1); }
.qa-item.open .oyl-q {
    background: linear-gradient(135deg, var(--color-accent), #1a8bb5);
    border-color: var(--color-accent);
    color: #fff;
    box-shadow: 0 10px 30px var(--color-accent-glow);
}
.qa-item.open .oyl-q .q-ico { color: #fff; }

/* Inline answer panel */
.qa-answer {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.5s cubic-bezier(.2,.8,.2,1);
}
.qa-answer-inner {
    overflow: hidden;
    min-height: 0;
}
.qa-item.open .qa-answer { grid-template-rows: 1fr; }
.qa-item.open .qa-body-wrap {
    background: linear-gradient(180deg, rgba(51,181,229,0.08) 0%, rgba(51,181,229,0.02) 100%);
    border: 1px solid var(--color-border);
    margin: 10px 0 6px;
    border-radius: 16px;
}
.qa-body-wrap {
    display: flex;
    gap: 14px;
    padding: 18px 20px;
    align-items: flex-start;
}
.qa-body-wrap .bot-avatar {
    flex-shrink: 0;
    width: 32px; height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-accent), #1a8bb5);
    display: grid; place-items: center;
    color: #fff;
    box-shadow: 0 4px 14px var(--color-accent-glow);
}
.qa-body-wrap .bot-avatar .material-symbols-outlined {
    font-size: 18px;
    font-variation-settings: 'FILL' 1;
}
.qa-body {
    flex: 1;
    font-size: 1rem;
    color: var(--color-text-primary);
    line-height: 1.65;
    min-width: 0;
}
.qa-body strong { color: var(--color-accent-light); }
.qa-body ul { margin: 10px 0 0 18px; }
.qa-body li { margin-bottom: 6px; }
.qa-body p + p { margin-top: 10px; }
.qa-body a { color: var(--color-accent-light); }

.qa-typing {
    display: inline-flex; gap: 4px; align-items: center; padding: 6px 0;
}
.qa-typing span {
    width: 7px; height: 7px; border-radius: 50%;
    background: var(--color-accent);
    animation: typingBounce 1.2s infinite;
}
.qa-typing span:nth-child(2) { animation-delay: 0.2s; }
.qa-typing span:nth-child(3) { animation-delay: 0.4s; }

.cursor {
    display: inline-block;
    color: var(--color-accent);
    font-weight: 700;
    animation: blink 0.9s step-end infinite;
    margin-left: 2px;
}
@keyframes blink { 50% { opacity: 0; } }

@keyframes typingBounce {
    0%, 60%, 100% { opacity: 0.3; transform: translateY(0); }
    30% { opacity: 1; transform: translateY(-5px); }
}

/* Final CTA */
.scene-3 { padding-top: 40px; padding-bottom: 60px; text-align: center; }
.final-block h2 {
    font-size: clamp(2rem, 4.5vw, 3rem);
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}
.final-block h2 .hl {
    background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.final-block p {
    color: var(--color-text-secondary);
    font-size: clamp(1.15rem, 1.8vw, 1.4rem);
    margin-bottom: 32px;
}

/* ===== Mobile ===== */
@media (max-width: 900px) {
    .float-ico { font-size: 56px !important; opacity: 0.06; }
}

@media (max-width: 720px) {
    .scene { padding: 56px 18px 32px; }
    .scene-1 { padding-top: 90px; }

    .hero-block { margin-bottom: 28px; }
    .hero-title { margin-bottom: 14px; font-size: 2.6rem; line-height: 1; }
    .hero-lead {
        font-size: 1.1rem;
        line-height: 1.5;
        padding: 24px 22px;
        border-radius: 16px;
    }
    .hero-lead .sps-mark { padding: 2px 10px; font-size: 0.95em; }

    .features { max-width: 100%; }
    .feature-row {
        grid-template-columns: 44px 1fr;
        gap: 16px;
        padding: 20px 0;
    }
    .feature-row .material-symbols-outlined { font-size: 36px; }
    .feature-row .num { font-size: 0.68rem; letter-spacing: 0.2em; margin-bottom: 4px; }
    .feature-row h3 { font-size: 1.2rem; margin-bottom: 8px; }
    .feature-row p { font-size: 1.1rem; line-height: 1.55; }

    .video-btn { width: 100%; justify-content: center; padding: 16px 20px; }

    .chat-head-block { margin-bottom: 24px; }
    .chat-head-block p { font-size: 1rem; }

    .oyl-chat-head { gap: 10px; padding-bottom: 14px; margin-bottom: 18px; }
    .oyl-chat-head .avatar { width: 40px; height: 40px; }
    .oyl-chat-head .avatar .material-symbols-outlined { font-size: 22px; }
    .oyl-chat-head h3 { font-size: 1.05rem; }
    .oyl-chat-head .status { font-size: 0.78rem; }

    .oyl-questions { gap: 8px; }
    .qa-item { flex-basis: 100%; min-width: 0; }
    .oyl-q {
        padding: 12px 14px;
        font-size: 0.95rem;
        gap: 10px;
        min-height: 48px;
    }
    .oyl-q .q-ico { font-size: 18px; }
    .oyl-q:hover { transform: none; }
    .qa-body-wrap { padding: 14px 14px; gap: 10px; }
    .qa-body-wrap .bot-avatar { width: 28px; height: 28px; }
    .qa-body-wrap .bot-avatar .material-symbols-outlined { font-size: 16px; }
    .qa-body { font-size: 0.95rem; }

    .scene-3 { padding-top: 24px; padding-bottom: 48px; }
    .final-block h2 { font-size: 1.9rem; }
    .final-block p { font-size: 1rem; }
    .final-block .btn { width: 100%; justify-content: center; padding: 16px 24px; }

    .scroll-progress { height: 2px; }
}

/* Tiny phones */
@media (max-width: 380px) {
    .hero-title { font-size: 2.4rem; }
    .feature-row {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    .feature-row .icon-wrap { justify-content: flex-start; }
}

/* Landscape short screens */
@media (max-height: 520px) and (orientation: landscape) {
    .scene { min-height: auto; padding-top: 80px; }
}

/* Disable hover transforms on touch */
@media (hover: none) {
    .oyl-q:hover, .video-btn:hover { transform: none; }
    .feature-row:hover { background: transparent; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .reveal { opacity: 1; transform: none; }
    .float-ico { display: none; }
}