/* ─── Design Tokens ─────────────────────────────────────────── */

:root {
    /* Colors — Light Mode */
    --color-bg:           #FBFBFD;
    --color-bg-secondary: #F5F5F7;
    --color-bg-card:      #FFFFFF;
    --color-text:         #1D1D1F;
    --color-text-secondary: #6E6E73;
    --color-text-tertiary:  #86868B;
    --color-accent:       #0071E3;
    --color-accent-hover: #0077ED;
    --color-border:       #D2D2D7;
    --color-kbd-bg:       #E8E8ED;
    --color-kbd-border:   #C7C7CC;
    --color-nav-bg:       rgba(251, 251, 253, 0.8);
    --color-card-shadow:  rgba(0, 0, 0, 0.04);
    --color-card-shadow2: rgba(0, 0, 0, 0.08);
    --color-mockup-bg:    #FFFFFF;
    --color-mockup-chrome: #F0F0F0;

    /* Typography */
    --font-system: -apple-system, BlinkMacSystemFont, "SF Pro Display",
                   "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
    --font-mono: "SF Mono", SFMono-Regular, ui-monospace, Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg:           #000000;
        --color-bg-secondary: #1C1C1E;
        --color-bg-card:      #2C2C2E;
        --color-text:         #F5F5F7;
        --color-text-secondary: #A1A1A6;
        --color-text-tertiary:  #6E6E73;
        --color-accent:       #2997FF;
        --color-accent-hover: #42A5FF;
        --color-border:       #38383A;
        --color-kbd-bg:       #3A3A3C;
        --color-kbd-border:   #48484A;
        --color-nav-bg:       rgba(0, 0, 0, 0.8);
        --color-card-shadow:  rgba(0, 0, 0, 0.2);
        --color-card-shadow2: rgba(0, 0, 0, 0.3);
        --color-mockup-bg:    #1C1C1E;
        --color-mockup-chrome: #2C2C2E;
    }
}

/* ─── Reset & Base ──────────────────────────────────────────── */

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-system);
    font-size: 17px;
    line-height: 1.65;
    color: var(--color-text);
    background: var(--color-bg);
    letter-spacing: -0.005em;
}

a {
    color: var(--color-accent);
    text-decoration: none;
}

/* ─── Layout ────────────────────────────────────────────────── */

.section-content {
    max-width: 980px;
    margin: 0 auto;
    padding: 0 max(24px, 5vw);
}

.bg-secondary {
    background: var(--color-bg-secondary);
}

/* ─── Nav ───────────────────────────────────────────────────── */

.nav {
    position: sticky;
    top: 0;
    z-index: 100;
    height: 52px;
    background: var(--color-nav-bg);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(210, 210, 215, 0.5);
}

@media (prefers-color-scheme: dark) {
    .nav {
        border-bottom-color: rgba(56, 56, 58, 0.5);
    }
}

.nav-content {
    max-width: 980px;
    margin: 0 auto;
    padding: 0 max(24px, 5vw);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.nav-logo span {
    color: var(--color-accent);
}

.nav-download {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-bg);
    background: var(--color-accent);
    padding: 6px 16px;
    border-radius: 980px;
    transition: background-color 200ms ease;
}

.nav-download:hover {
    background: var(--color-accent-hover);
}

@media (prefers-color-scheme: dark) {
    .nav-download {
        color: #FFFFFF;
    }
}

/* ─── Hero ──────────────────────────────────────────────────── */

.hero {
    padding: 100px 0 80px;
    text-align: center;
}

.pill {
    display: inline-block;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    color: var(--color-accent);
    background: rgba(0, 113, 227, 0.08);
    padding: 5px 14px;
    border-radius: 980px;
    margin-bottom: 24px;
}

@media (prefers-color-scheme: dark) {
    .pill {
        background: rgba(41, 151, 255, 0.15);
    }
}

.hero-headline {
    font-size: clamp(44px, 5vw, 72px);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.03em;
    max-width: 720px;
    margin: 0 auto 20px;
}

.hero-sub {
    font-size: clamp(18px, 2vw, 22px);
    line-height: 1.4;
    color: var(--color-text-secondary);
    max-width: 540px;
    margin: 0 auto 32px;
    letter-spacing: -0.01em;
}

.hero-cta {
    margin-bottom: 60px;
}

.btn-primary {
    display: inline-block;
    font-size: 17px;
    font-weight: 500;
    color: #FFFFFF;
    background: var(--color-accent);
    padding: 12px 28px;
    border-radius: 980px;
    transition: background-color 200ms ease, transform 200ms ease;
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    transform: scale(1.02);
    color: #FFFFFF;
}

.btn-large {
    font-size: 18px;
    padding: 16px 36px;
}

.hero-meta {
    font-size: 13px;
    color: var(--color-text-tertiary);
    margin-top: 12px;
}

/* ─── Hero Illustration — 3 Display Setup ───────────────────── */

.hero-illustration {
    position: relative;
    width: 540px;
    height: 300px;
    margin: 0 auto;
}

/* Shared screen & content styles */
.monitor-screen {
    background: var(--color-bg-secondary);
    border: 2px solid var(--color-border);
    border-radius: 10px 10px 2px 2px;
    padding: 14px;
    display: flex;
    align-items: flex-start;
}

.monitor-content {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.mock-line {
    height: 5px;
    border-radius: 3px;
    background: var(--color-border);
    opacity: 0.6;
}

.w40 { width: 40%; }
.w55 { width: 55%; }
.w60 { width: 60%; }
.w70 { width: 70%; }
.w80 { width: 80%; }

.monitor-stand {
    width: 32px;
    height: 16px;
    margin: 0 auto;
    border-left: 2px solid var(--color-border);
    border-right: 2px solid var(--color-border);
    border-bottom: 2px solid var(--color-border);
    border-radius: 0 0 4px 4px;
}

/* ── MacBook (centered below main monitor) ── */
.laptop {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

.laptop-screen {
    width: 140px;
    height: 88px;
    background: var(--color-bg-secondary);
    border: 2px solid var(--color-border);
    border-radius: 8px 8px 0 0;
    padding: 12px;
    display: flex;
    align-items: flex-start;
}

.laptop-base {
    width: 160px;
    height: 10px;
    background: var(--color-border);
    border-radius: 0 0 4px 4px;
    margin-left: -10px;
    position: relative;
}

.laptop-trackpad {
    width: 40px;
    height: 4px;
    background: var(--color-bg);
    border-radius: 2px;
    position: absolute;
    top: 3px;
    left: 50%;
    transform: translateX(-50%);
}

/* ── Main monitor (center, above laptop) ── */
.main-display {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
}

.main-display .monitor-screen {
    width: 240px;
    height: 150px;
    padding: 18px;
}

.main-display .monitor-content {
    gap: 8px;
}

.main-display .mock-line {
    height: 6px;
}

/* ── Portrait monitor (right) ── */
.portrait-display {
    position: absolute;
    top: 36px;
    right: 10px;
}

.portrait-screen {
    width: 90px;
    height: 150px;
    border-radius: 8px 8px 2px 2px;
    padding: 10px;
}

.portrait-screen .monitor-content {
    gap: 5px;
}

.portrait-screen .mock-line {
    height: 4px;
}

/* ── SVG arcs ── */
.hop-svg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    color: #FF8C00;
    pointer-events: none;
}

/* ── Animated cursor ── */
.cursor-dot {
    position: absolute;
    width: 12px;
    height: 12px;
    background: #FF8C00;
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(255, 140, 0, 0.5), 0 0 20px rgba(255, 140, 0, 0.25);
    /* Round trip: laptop(270,240) → main(270,75) → portrait(485,110) → back */
    offset-path: path('M270 240 Q230 160 270 75 Q380 35 485 110 Q380 35 270 75 Q230 160 270 240');
    animation: hop-three 5s ease-in-out infinite;
}

@media (prefers-color-scheme: dark) {
    .cursor-dot {
        box-shadow: 0 0 12px rgba(255, 140, 0, 0.6), 0 0 24px rgba(255, 140, 0, 0.3);
    }
}

/* Path segments are unequal: laptop→main ~21%, main→portrait ~29%, portrait→main ~29%, main→laptop ~21% */
@keyframes hop-three {
    0%   { offset-distance: 0%;    }
    6%   { offset-distance: 0%;    }  /* pause on laptop */
    21%  { offset-distance: 21%;   }  /* arrive at main */
    28%  { offset-distance: 21%;   }  /* pause on main */
    50%  { offset-distance: 50%;   }  /* arrive at portrait */
    57%  { offset-distance: 50%;   }  /* pause on portrait */
    79%  { offset-distance: 79%;   }  /* back at main */
    86%  { offset-distance: 79%;   }  /* pause on main */
    100% { offset-distance: 100%;  }  /* back at laptop */
}

/* ─── How It Works ──────────────────────────────────────────── */

.how-it-works {
    padding: 100px 0;
}

.section-title {
    font-size: clamp(32px, 3.5vw, 48px);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.025em;
    text-align: center;
    margin-bottom: 56px;
}

.steps {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 0;
    max-width: 820px;
    margin: 0 auto;
}

.step {
    flex: 1;
    text-align: center;
    padding: 0 24px;
}

.step-number {
    width: 40px;
    height: 40px;
    line-height: 40px;
    border-radius: 50%;
    background: var(--color-accent);
    color: #FFFFFF;
    font-size: 17px;
    font-weight: 600;
    margin: 0 auto 16px;
}

.step h3 {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 8px;
}

.step p {
    font-size: 15px;
    line-height: 1.5;
    color: var(--color-text-secondary);
}

.step-connector {
    width: 60px;
    height: 2px;
    background: var(--color-border);
    flex-shrink: 0;
    margin-top: 20px;
    border-radius: 1px;
}

.step kbd {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 500;
    background: var(--color-kbd-bg);
    border: 1px solid var(--color-kbd-border);
    border-radius: 5px;
    padding: 1px 5px;
    letter-spacing: 0.02em;
}

/* ─── Features ──────────────────────────────────────────────── */

.features {
    padding: 100px 0;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.feature-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 32px;
    transition: transform 300ms ease, box-shadow 300ms ease;
    box-shadow: 0 1px 2px var(--color-card-shadow), 0 1px 3px var(--color-card-shadow2);
}

.feature-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 2px 8px var(--color-card-shadow), 0 4px 16px var(--color-card-shadow2);
}

.feature-icon {
    font-size: 28px;
    margin-bottom: 14px;
    line-height: 1;
}

.feature-card h3 {
    font-size: 19px;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 15px;
    line-height: 1.5;
    color: var(--color-text-secondary);
}

/* ─── Keyboard Showcase ─────────────────────────────────────── */

.keyboard-showcase {
    padding: 100px 0;
}

.keyboard-showcase .section-title {
    text-align: left;
    margin-bottom: 20px;
}

.showcase-layout {
    display: flex;
    align-items: center;
    gap: 80px;
    max-width: 820px;
    margin: 0 auto;
}

.showcase-text {
    flex: 1;
}

.showcase-text p {
    font-size: 17px;
    line-height: 1.65;
    color: var(--color-text-secondary);
}

.showcase-keys {
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.key-row {
    display: flex;
    align-items: center;
    gap: 16px;
}

.key-combo {
    display: flex;
    gap: 6px;
}

.key-combo kbd {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 10px;
    font-family: var(--font-mono);
    font-size: 15px;
    font-weight: 500;
    letter-spacing: 0.02em;
    background: var(--color-kbd-bg);
    border: 1px solid var(--color-kbd-border);
    border-bottom-width: 3px;
    border-radius: 8px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25);
    transition: transform 150ms ease, border-bottom-width 150ms ease;
    cursor: default;
    user-select: none;
}

.key-combo kbd:hover {
    transform: translateY(1px);
    border-bottom-width: 1px;
}

.key-wide {
    min-width: 56px;
}

.key-label {
    font-size: 15px;
    color: var(--color-text-secondary);
    white-space: nowrap;
}

/* ─── Lightweight & Native ──────────────────────────────────── */

.native-section {
    padding: 100px 0;
    text-align: center;
}

.section-sub {
    font-size: clamp(17px, 1.8vw, 20px);
    line-height: 1.5;
    color: var(--color-text-secondary);
    max-width: 540px;
    margin: -32px auto 48px;
    letter-spacing: -0.01em;
}

/* Menu bar mockup */
.menubar-mockup {
    max-width: 320px;
    margin: 0 auto 56px;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--color-border);
    box-shadow: 0 4px 24px var(--color-card-shadow), 0 1px 4px var(--color-card-shadow2);
    background: var(--color-mockup-bg);
    text-align: left;
}

.menubar-chrome {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background: var(--color-mockup-chrome);
    border-bottom: 1px solid var(--color-border);
}

.menubar-dots {
    display: flex;
    gap: 6px;
}

.menubar-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-border);
}

.menubar-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text);
}

.menubar-items {
    padding: 6px 0;
}

.menubar-item {
    display: flex;
    justify-content: space-between;
    padding: 5px 14px;
    font-size: 13px;
    color: var(--color-text);
}

.menubar-shortcut {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--color-text-tertiary);
}

.menubar-sep {
    height: 1px;
    background: var(--color-border);
    margin: 4px 10px;
}

/* Stats */
.stats-row {
    display: flex;
    justify-content: center;
    gap: 60px;
    max-width: 640px;
    margin: 0 auto;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.stat-label {
    font-size: 14px;
    color: var(--color-text-tertiary);
    margin-top: 4px;
}

/* ─── Closing CTA ───────────────────────────────────────────── */

.closing-cta {
    padding: 120px 0;
    text-align: center;
}

.closing-cta .section-title {
    margin-bottom: 32px;
}

.closing-meta {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-top: 20px;
    line-height: 1.6;
}

.closing-version {
    font-size: 13px;
    color: var(--color-text-tertiary);
    margin-top: 8px;
}

/* ─── Footer ────────────────────────────────────────────────── */

.footer {
    border-top: 1px solid var(--color-border);
    padding: 24px 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--color-text-tertiary);
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    color: var(--color-text-tertiary);
    transition: color 200ms ease;
}

.footer-links a:hover {
    color: var(--color-text);
}

/* ─── Scroll Animations ─────────────────────────────────────── */

.animate-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 600ms cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 600ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.animate-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.animate-in[data-delay="1"] { transition-delay: 80ms; }
.animate-in[data-delay="2"] { transition-delay: 160ms; }
.animate-in[data-delay="3"] { transition-delay: 240ms; }
.animate-in[data-delay="4"] { transition-delay: 320ms; }
.animate-in[data-delay="5"] { transition-delay: 400ms; }

@media (prefers-reduced-motion: reduce) {
    .animate-in {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .cursor-dot {
        animation: none;
        offset-distance: 50%;
    }
}

/* ─── Responsive ────────────────────────────────────────────── */

@media (max-width: 768px) {
    .hero {
        padding: 72px 0 60px;
    }

    .hero-illustration {
        width: 360px;
        height: 200px;
    }

    .laptop-screen {
        width: 100px;
        height: 64px;
        padding: 8px;
    }

    .laptop-base {
        width: 114px;
        height: 8px;
        margin-left: -7px;
    }

    .main-display .monitor-screen {
        width: 140px;
        height: 88px;
        padding: 12px;
    }

    .portrait-screen {
        width: 64px;
        height: 106px;
        padding: 8px;
    }

    .steps {
        flex-direction: column;
        gap: 32px;
        align-items: center;
    }

    .step-connector {
        width: 2px;
        height: 32px;
        margin-top: 0;
    }

    .step {
        padding: 0;
    }

    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
    }

    .feature-card {
        padding: 24px;
    }

    .showcase-layout {
        flex-direction: column;
        gap: 40px;
    }

    .keyboard-showcase .section-title {
        text-align: center;
    }

    .showcase-text {
        text-align: center;
    }

    .stats-row {
        gap: 32px;
    }

    .stat-value {
        font-size: 26px;
    }
}

@media (max-width: 480px) {
    .hero-headline {
        font-size: 38px;
    }

    .feature-grid {
        grid-template-columns: 1fr;
    }

    .stats-row {
        flex-direction: column;
        gap: 24px;
    }

    .footer-content {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
}