/* AI Studio first-steps tour — scroll-driven spotlight over a live mock of the app. */

:root {
    --paper: #faf8f5;
    --ink: #2a2725;
    --muted: #8a8278;
    --line: #e8e2da;
    --coral: #e8623d;
    --coral-soft: #fff0eb;
    --sidebar: #f2ede6;
    --mock: #fffdfb;
    --shadow: 0 24px 60px rgba(42, 39, 37, 0.12);
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
    --display: "Fraunces", "Times New Roman", serif;
    --ui: "Inter", system-ui, sans-serif;
}

html.dark {
    --paper: #1a1816;
    --ink: #ede8e3;
    --muted: #8a8278;
    --line: #3a3530;
    --coral: #ff7a4d;
    --coral-soft: rgba(255, 122, 77, 0.14);
    --sidebar: #232020;
    --mock: #1f1c1a;
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

html {
    scroll-behavior: smooth;
}

.stage-pin {
    --guide-steps: 10;
    height: calc(var(--guide-steps) * 100dvh);
}

body {
    margin: 0;
    font-family: var(--ui);
    background: var(--paper);
    color: var(--ink);
    overflow-x: clip;
}

.guide-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 0;
    z-index: 80;
    background: var(--coral);
    transform-origin: left;
    pointer-events: none;
}

.guide-header {
    position: sticky;
    top: 0;
    z-index: 50;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.25rem;
    background: color-mix(in srgb, var(--paper) 82%, transparent);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
}

.guide-header a {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--ink);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
}

.guide-header a:hover {
    color: var(--coral);
}

.guide-header h1 {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    margin: 0;
    font-size: 1.05rem;
    font-weight: 500;
    display: none;
}

@media (min-width: 768px) {
    .guide-header h1 {
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }
}

/* ── Hero ── */

.hero {
    min-height: calc(100dvh - 64px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 3rem 1.5rem 5rem;
    position: relative;
}

.hero-kicker {
    letter-spacing: 0.18em;
    text-transform: uppercase;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--coral);
    margin-bottom: 1.25rem;
}

.hero h2 {
    font-family: var(--display);
    font-weight: 500;
    font-size: clamp(2.4rem, 7vw, 5.2rem);
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin: 0 0 1rem;
    font-optical-sizing: auto;
}

.hero p {
    max-width: 28rem;
    color: var(--muted);
    font-size: 1.125rem;
    line-height: 1.55;
    margin: 0;
}

.scroll-hint {
    position: absolute;
    bottom: 1.75rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
    color: var(--muted);
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    text-decoration: none;
}

.scroll-hint .chevron {
    width: 22px;
    height: 22px;
    animation: bob 1.8s var(--ease) infinite;
}

@keyframes bob {
    0%, 100% { transform: translateY(0); opacity: 0.45; }
    50% { transform: translateY(8px); opacity: 1; }
}

.stage {
    position: sticky;
    top: 64px;
    height: calc(100dvh - 64px);
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 0.85rem 0.85rem;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

@media (min-width: 960px) {
    .stage {
        display: grid;
        grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
        gap: 2rem;
        padding: 0 2rem 1.25rem;
        align-items: stretch;
    }
}

@media (min-width: 1280px) {
    .stage {
        gap: 2.5rem;
        grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    }
}

.stage-mock {
    position: relative;
    z-index: 10;
    flex: 0 0 42%;
    min-height: 168px;
    max-height: 46%;
    display: flex;
    align-items: stretch;
    justify-content: center;
    pointer-events: none;
    background: var(--paper);
    padding: 0.2rem 0 0.45rem;
}

@media (min-width: 700px) and (max-width: 959px) {
    .stage-mock {
        flex-basis: 48%;
        max-height: 52%;
        min-height: 220px;
    }

    .mock-ask {
        font-size: 18px;
    }
}

@media (min-width: 960px) {
    .stage-mock {
        flex: none;
        height: 100%;
        max-height: none;
        min-height: 0;
        padding: 0;
    }
}

@media (max-width: 699px) {
    .mock-suggestions,
    .mock-credit,
    .mock-launcher span:last-child {
        display: none;
    }
    .mock-ask {
        font-size: 15px;
    }

    .mock-greeting {
        padding: 0 12px 4px;
    }

    .mock-composer {
        margin: 0 8px 8px;
        padding: 8px 8px 6px;
    }

    .pointer-card {
        font-size: 12px;
        padding: 6px 10px;
    }

    .guide-pointer {
        max-width: min(168px, 58%);
    }

    .chapter h3 {
        font-size: clamp(1.25rem, 6vw, 1.85rem);
    }

    .chapter p {
        font-size: 0.95rem;
    }
}

@media (max-width: 420px) {
    .mock-nav {
        height: 28px;
        padding: 0 6px;
        gap: 4px;
        font-size: 10px;
    }

    .mock-icon-btn {
        width: 22px;
        height: 22px;
    }

    .mock-icon-btn .material-symbols-outlined {
        font-size: 16px;
    }

    .mock-composer-right {
        gap: 0;
    }

    .mock-flyout {
        width: 140px;
    }
}

.mock-frame {
    position: relative;
    width: 100%;
    max-width: 640px;
    height: 100%;
    overflow: hidden;
    border-radius: 18px;
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    background: var(--mock);
}

.mock-shell {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    background: var(--mock);
    overflow: hidden;
    font-size: 12px;
}

.mock-sidebar {
    width: min(40%, 148px);
    flex-shrink: 0;
    background: var(--sidebar);
    border-right: 1px solid var(--line);
    display: flex;
    flex-direction: column;
    padding: 8px 6px;
    gap: 2px;
}

@media (min-width: 700px) {
    .mock-sidebar {
        width: 148px;
        padding: 10px 8px;
    }
}

.chats-hotspot,
.places-hotspot {
    display: flex;
    flex-direction: column;
    gap: 2px;
    border-radius: 12px;
}

.chats-hotspot.is-on,
.places-hotspot.is-on,
.mock-composer-right.is-on {
    background: color-mix(in srgb, var(--mock) 70%, transparent);
}

.mock-hist-grow {
    flex: 1;
    min-height: 6px;
}

.mock-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    background: var(--paper);
}

.mock-top {
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
    color: var(--muted);
    gap: 8px;
}

.mock-launcher {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    min-width: 0;
    font-size: 12px;
    font-weight: 500;
    color: var(--ink);
}

.mock-launcher span:last-child {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mock-top-right {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.mock-credit {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 2px 7px;
    border-radius: 999px;
    background: var(--coral-soft);
    color: var(--coral);
    font-size: 10px;
    font-weight: 600;
}

.mock-credit .material-symbols-outlined {
    font-size: 12px;
}

.mock-greeting {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 0 28px 8px;
    transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
}

.stage[data-spot="compose"] .mock-greeting,
.stage[data-spot="attach"] .mock-greeting,
.stage[data-spot="tools"] .mock-greeting,
.stage[data-spot="model"] .mock-greeting,
.stage[data-spot="send"] .mock-greeting {
    opacity: 0.28;
}

.mock-hi {
    font-size: 13px;
    color: var(--coral);
    font-weight: 500;
}

.mock-ask {
    font-size: 20px;
    font-weight: 500;
    letter-spacing: -0.02em;
    margin-top: 2px;
}

.mock-suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 12px;
}

.mock-suggestions > span {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 5px 10px;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: var(--mock);
    font-size: 11px;
    font-weight: 500;
    color: var(--ink);
}

.mock-suggestions .material-symbols-outlined {
    font-size: 14px;
    color: var(--coral);
}

.mock-composer {
    margin: 0 16px 16px;
    padding: 10px 12px 8px;
    border: 1px solid var(--line);
    border-radius: 22px;
    background: var(--mock);
    position: relative;
}

.mock-input-line {
    min-height: 28px;
    color: var(--muted);
    font-size: 13px;
    display: flex;
    align-items: center;
    border-radius: 8px;
    padding: 0 2px;
}

.mock-caret {
    display: inline-block;
    width: 1.5px;
    height: 14px;
    margin-left: 2px;
    background: var(--coral);
    opacity: 0;
}

.stage[data-spot="compose"] .mock-caret {
    opacity: 1;
    animation: blink 1.05s steps(1) infinite;
}

@keyframes blink { 50% { opacity: 0; } }

.mock-composer-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 4px;
}

.mock-composer-left,
.mock-composer-right {
    display: flex;
    align-items: center;
    gap: 2px;
    min-width: 0;
}

.mock-composer-right {
    flex-shrink: 1;
}

.mock-icon-btn {
    width: 28px;
    height: 28px;
    border: 0;
    background: transparent;
    color: var(--ink);
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.mock-icon-btn .material-symbols-outlined {
    font-size: 18px;
}

.mock-model {
    font-size: 11px;
    font-weight: 500;
    padding: 4px 6px 4px 8px;
    border-radius: 999px;
    color: var(--ink);
    display: inline-flex;
    align-items: center;
    gap: 0;
    min-width: 0;
}

.mock-model .material-symbols-outlined {
    font-size: 14px;
    color: var(--muted);
}

@media (max-width: 420px) {
    .mock-model {
        font-size: 9px;
        padding: 2px 3px;
        max-width: 3.2rem;
    }
    .mock-model .material-symbols-outlined { display: none; }
}

.mock-send {
    color: var(--coral);
}

.mock-nav {
    display: flex;
    align-items: center;
    gap: 6px;
    width: 100%;
    height: 32px;
    padding: 0 8px;
    border: 0;
    background: transparent;
    color: var(--ink);
    border-radius: 999px;
    font: inherit;
    font-weight: 600;
    text-align: left;
    min-width: 0;
}

.mock-nav > span:not(.material-symbols-outlined):not(.callout) {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
}

.mock-nav .material-symbols-outlined,
.mock-nav svg {
    width: 16px;
    height: 16px;
    font-size: 16px;
    flex-shrink: 0;
}

.mock-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    padding: 0;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mock-hist-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4px;
    padding: 10px 8px 4px;
}

.mock-hist-actions {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    color: var(--muted);
    flex-shrink: 0;
}

.mock-hist-actions .material-symbols-outlined {
    font-size: 14px;
}

.mock-menu {
    margin-bottom: 4px;
    color: var(--muted);
}

.mock-hist {
    padding: 0 8px;
}

.mock-hist-item {
    height: 26px;
    border-radius: 8px;
    background: color-mix(in srgb, var(--ink) 6%, transparent);
    margin-bottom: 4px;
}

.mock-hist-item:nth-child(2) { width: 78%; }
.mock-hist-item:nth-child(3) { width: 62%; }

.mock-flyout.hotspot {
    position: absolute;
    left: 8px;
    bottom: 48px;
    width: 176px;
    max-height: min(240px, calc(100% + 120px));
    overflow-y: auto;
    background: var(--mock);
    border: 1px solid var(--line);
    border-radius: 14px;
    box-shadow: var(--shadow);
    padding: 4px 0;
    opacity: 0;
    transform: translateY(10px) scale(0.96);
    transform-origin: bottom left;
    pointer-events: none;
    transition: opacity 0.35s var(--ease), transform 0.45s var(--ease);
    z-index: 6;
}

.mock-flyout.is-tools { left: 40px; }
.mock-flyout.is-models { left: auto; right: 8px; width: 158px; transform-origin: bottom right; }
.stage[data-spot="attach"] .mock-flyout.is-plus,
.stage[data-spot="tools"] .mock-flyout.is-tools,
.stage[data-spot="model"] .mock-flyout.is-models {
    opacity: 1; transform: translateY(0) scale(1); visibility: visible;
}
.mock-flyout:not(.is-on) { opacity: 0 !important; visibility: hidden; }
.mock-flyout-head { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); padding: 4px 10px 2px !important; }
.mock-flyout .is-checked { font-weight: 600; color: var(--coral); }
.mock-flyout .mock-family { justify-content: space-between; }
.mock-flyout .mock-family .material-symbols-outlined { font-size: 14px; }

.mock-flyout div {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px 10px;
    font-size: 11px;
}

.mock-flyout .material-symbols-outlined {
    font-size: 16px;
    color: var(--muted);
}

/* Spotlight + overlay pointer */

.callout {
    display: none;
}

.hotspot {
    position: relative;
    z-index: 1;
    transition: background-color 0.35s, color 0.35s;
}

.stage.is-spotlit .hotspot:not(.is-on):not(.mock-flyout) {
    opacity: 0.42;
}

.hotspot.is-on,
.hotspot.is-on .hotspot:not(.mock-flyout) {
    z-index: 5;
    opacity: 1 !important;
}

.hotspot.is-on {
    background: var(--mock);
}

.guide-ring {
    position: absolute;
    z-index: 20;
    border: 3px solid var(--coral);
    border-radius: 14px;
    pointer-events: none;
    opacity: 0;
    box-shadow:
        0 0 0 6px color-mix(in srgb, var(--coral) 28%, transparent),
        0 0 0 999px rgba(26, 24, 22, 0.42);
    transition: left 0.45s var(--ease), top 0.45s var(--ease), width 0.45s var(--ease), height 0.45s var(--ease), opacity 0.2s;
}

.guide-ring.is-on {
    opacity: 1;
    animation: ring-pulse 1.4s var(--ease) infinite;
}

@keyframes ring-pulse {
    0%, 100% { box-shadow: 0 0 0 6px color-mix(in srgb, var(--coral) 28%, transparent), 0 0 0 999px rgba(26, 24, 22, 0.42); }
    50% { box-shadow: 0 0 0 10px color-mix(in srgb, var(--coral) 12%, transparent), 0 0 0 999px rgba(26, 24, 22, 0.42); }
}

html.dark .guide-ring { box-shadow: 0 0 0 6px color-mix(in srgb, var(--coral) 35%, transparent), 0 0 0 999px rgba(0, 0, 0, 0.55); }

.guide-pointer {
    position: absolute;
    z-index: 30;
    display: flex;
    align-items: center;
    gap: 8px;
    opacity: 0;
    pointer-events: none;
    max-width: min(240px, calc(100% - 16px));
    transition: left 0.45s var(--ease), top 0.45s var(--ease), opacity 0.2s;
}

.guide-pointer.is-on {
    opacity: 1;
}

.guide-pointer.from-right {
    transform: translate(10px, -50%);
    flex-direction: row;
}

.guide-pointer.from-left {
    transform: translate(calc(-100% - 10px), -50%);
    flex-direction: row;
}

.guide-pointer.from-above {
    transform: translate(-50%, calc(-100% - 10px));
    flex-direction: column;
    align-items: center;
}

.guide-pointer.from-below {
    transform: translate(-50%, 10px);
    flex-direction: column;
    align-items: center;
}

.pointer-card {
    margin: 0;
    padding: 8px 12px;
    background: var(--coral);
    color: #fff;
    border-radius: 12px;
    font-size: 13px;
    font-weight: 600;
    line-height: 1.35;
    box-shadow: 0 8px 20px rgba(232, 98, 61, 0.35);
    overflow-wrap: break-word;
    white-space: normal;
}

.pointer-arrow {
    flex-shrink: 0;
    display: block;
}

.guide-pointer.from-right .pointer-arrow {
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 12px 20px 12px 0;
    border-color: transparent var(--coral) transparent transparent;
    animation: poke-x 0.75s var(--ease) infinite;
    order: -1;
}

.guide-pointer.from-left .pointer-arrow {
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 12px 0 12px 20px;
    border-color: transparent transparent transparent var(--coral);
    animation: poke-x-left 0.75s var(--ease) infinite;
    order: 2;
}

.guide-pointer.from-above .pointer-arrow {
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 20px 12px 0 12px;
    border-color: var(--coral) transparent transparent transparent;
    animation: poke-y 0.75s var(--ease) infinite;
    order: 2;
}

.guide-pointer.from-below .pointer-arrow {
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 12px 20px 12px;
    border-color: transparent transparent var(--coral) transparent;
    animation: poke-y-up 0.75s var(--ease) infinite;
    order: -1;
}

@keyframes poke-x { 0%, 100% { transform: translateX(6px); } 50% { transform: translateX(0); } }
@keyframes poke-x-left { 0%, 100% { transform: translateX(-6px); } 50% { transform: translateX(0); } }
@keyframes poke-y { 0%, 100% { transform: translateY(6px); } 50% { transform: translateY(0); } }
@keyframes poke-y-up { 0%, 100% { transform: translateY(-6px); } 50% { transform: translateY(0); } }

/* ── Chapters ── */

.chapters {
    position: relative;
    flex: 1;
    min-height: 0;
    padding: 0 0.15rem;
}

.chapter {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 0.35rem 0.15rem 0.75rem;
    overflow: auto;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(16px);
    transition: opacity 0.4s var(--ease), transform 0.45s var(--ease), visibility 0.4s;
}

.chapter.is-active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
}

.chapter-num {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--coral);
    margin-bottom: 0.75rem;
}

.chapter h3 {
    font-family: var(--display);
    font-weight: 500;
    font-size: clamp(1.45rem, 3.6vw, 2.6rem);
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin: 0 0 0.9rem;
}

.chapter p {
    margin: 0;
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.6;
    max-width: 36ch;
}

.cta-block {
    text-align: left;
}

.cta-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.btn-primary,
.btn-ghost {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.8rem 1.2rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.92rem;
    text-decoration: none;
    transition: transform 0.15s var(--ease), background 0.2s;
}

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

.btn-primary:hover {
    filter: brightness(1.05);
}

.btn-primary:active,
.btn-ghost:active {
    transform: scale(0.97);
}

.btn-ghost {
    background: transparent;
    color: var(--ink);
    border: 1px solid var(--line);
}

.btn-ghost:hover {
    background: var(--sidebar);
}

.paper-grain {
    pointer-events: none;
    position: fixed;
    inset: 0;
    z-index: 1;
    opacity: 0.035;
    mix-blend-mode: multiply;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

html.dark .paper-grain {
    mix-blend-mode: overlay;
    opacity: 0.07;
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .scroll-hint .chevron,
    .mock-caret,
    .hotspot.is-on,
    .chapter {
        animation: none !important;
    }
    .mock-flyout,
    .hotspot,
    .mock-greeting,
    .guide-ring,
    .guide-pointer {
        transition: none !important;
    }
    .guide-ring.is-on,
    .guide-pointer.from-right .pointer-arrow,
    .guide-pointer.from-left .pointer-arrow,
    .guide-pointer.from-above .pointer-arrow,
    .guide-pointer.from-below .pointer-arrow {
        animation: none !important;
    }
}