/* Poster Basım — tanıtım sayfası
   Görsel dil programın çıktısından geliyor: A4 karoları, kesme kılavuzları,
   hizalama işaretleri, numaralı sayfalar. Renkler uygulama simgesinden alındı. */

:root {
    color-scheme: light;

    /* Kimlik — simge.png'den örneklendi */
    --blue: oklch(0.546 0.219 262.9); /* #2563EB */
    --blue-deep: oklch(0.318 0.132 264);
    --blue-deeper: oklch(0.234 0.096 265);
    --blue-pale: oklch(0.882 0.059 254); /* #BFDBFE */
    --red: oklch(0.637 0.208 25.3); /* #EF4444 — hizalama işareti */
    --red-ink: oklch(0.54 0.19 27); /* metin için koyultulmuş hali, beyazda 5.6:1 */

    /* Kağıt ve mürekkep — nötrler markanın kendi mavisine doğru hafif kırılıyor */
    --paper: oklch(1 0 0);
    --paper-2: oklch(0.976 0.004 264);
    --ink: oklch(0.216 0.021 265);
    --ink-2: oklch(0.412 0.021 265);
    --rule: oklch(0.892 0.011 265);
    --rule-strong: oklch(0.78 0.02 265);

    --shell: min(1180px, 100% - 2.5rem);
    --step: clamp(1.6rem, 1.1rem + 2vw, 3rem);

    --z-sticky: 100;

    --ease: cubic-bezier(0.16, 1, 0.3, 1);

    font-family: Archivo, ui-sans-serif, system-ui, "Segoe UI", sans-serif;
    font-synthesis-weight: none;
}

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

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-size: 1.0625rem;
    line-height: 1.62;
    -webkit-font-smoothing: antialiased;
}

img,
svg {
    display: block;
    max-width: 100%;
}

a {
    color: var(--blue);
    text-underline-offset: 0.18em;
    text-decoration-thickness: from-font;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
    outline: 3px solid var(--blue);
    outline-offset: 3px;
    border-radius: 2px;
}

h1,
h2,
h3 {
    text-wrap: balance;
    letter-spacing: -0.025em;
    line-height: 1.08;
    margin: 0;
}

p {
    text-wrap: pretty;
}

.shell {
    width: var(--shell);
    margin-inline: auto;
}

.skip {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--ink);
    color: var(--paper);
    padding: 0.75rem 1.15rem;
    z-index: calc(var(--z-sticky) + 1);
}

.skip:focus {
    left: 0.75rem;
    top: 0.75rem;
}

/* ---------- Üst çubuk ---------- */

.site-head {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: color-mix(in oklab, var(--blue-deeper) 88%, transparent);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid oklch(1 0 0 / 0.12);
}

.site-head__in {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    min-height: 4rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    color: var(--paper);
    text-decoration: none;
    font-weight: 700;
    font-stretch: 110%;
    letter-spacing: -0.015em;
    margin-right: auto;
}

.brand svg {
    width: 1.75rem;
    height: 1.75rem;
    flex: none;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 1.4rem;
}

.site-nav a {
    color: oklch(1 0 0 / 0.82);
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 500;
}

.site-nav a:hover {
    color: var(--paper);
}

.lang {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: oklch(1 0 0 / 0.55);
}

.lang a {
    color: oklch(1 0 0 / 0.55);
    text-decoration: none;
}

.lang [aria-current] {
    color: var(--paper);
}

@media (max-width: 720px) {
    .site-nav {
        display: none;
    }
}

/* ---------- Hero ---------- */

.hero {
    position: relative;
    background:
        radial-gradient(
            120% 100% at 78% 0%,
            var(--blue-deep) 0%,
            var(--blue-deeper) 62%
        ),
        var(--blue-deeper);
    color: var(--paper);
    overflow: hidden;
    padding-block: clamp(3rem, 1.5rem + 6vw, 6rem) clamp(3.5rem, 2rem + 7vw, 7rem);
}

/* Kesme kılavuzu dokusu — programın ürettiği montaj çizgileri */
.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(oklch(1 0 0 / 0.055) 1px, transparent 1px),
        linear-gradient(90deg, oklch(1 0 0 / 0.055) 1px, transparent 1px);
    background-size: 62px 62px;
    mask-image: radial-gradient(120% 90% at 70% 10%, #000 20%, transparent 78%);
    pointer-events: none;
}

.hero__in {
    position: relative;
    display: grid;
    gap: clamp(2.5rem, 1rem + 6vw, 4.5rem);
    align-items: center;
}

@media (min-width: 940px) {
    .hero__in {
        grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    }
}

.hero h1 {
    font-size: clamp(2.25rem, 1.4rem + 3.3vw, 3.7rem);
    font-weight: 800;
    font-stretch: 108%;
    letter-spacing: -0.035em;
}

.hero__lede {
    margin: 1.35rem 0 0;
    max-width: 46ch;
    font-size: clamp(1.0625rem, 1rem + 0.35vw, 1.25rem);
    color: oklch(1 0 0 / 0.88);
    line-height: 1.68;
}

.hero__note {
    margin: 1.1rem 0 0;
    font-size: 0.9375rem;
    color: oklch(1 0 0 / 0.66);
}

.hero__note b {
    color: oklch(1 0 0 / 0.9);
    font-weight: 600;
}

/* ---------- Düğmeler ---------- */

.cta-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.85rem;
    margin-top: 2rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.9rem 1.5rem;
    border-radius: 6px;
    border: 1px solid transparent;
    font: inherit;
    font-size: 1rem;
    font-weight: 650;
    letter-spacing: -0.01em;
    text-decoration: none;
    cursor: pointer;
    transition:
        transform 0.25s var(--ease),
        background-color 0.25s var(--ease),
        border-color 0.25s var(--ease);
}

.btn--primary {
    background: var(--paper);
    color: var(--blue-deeper);
}

.btn--primary:hover {
    transform: translateY(-2px);
    background: var(--blue-pale);
}

.btn--ghost {
    border-color: oklch(1 0 0 / 0.3);
    color: var(--paper);
}

.btn--ghost:hover {
    border-color: var(--paper);
    background: oklch(1 0 0 / 0.08);
}

.btn--solid {
    background: var(--blue);
    color: var(--paper);
}

.btn--solid:hover {
    transform: translateY(-2px);
    background: var(--blue-deep);
}

.btn svg {
    width: 1.15em;
    height: 1.15em;
    flex: none;
}

@media (prefers-reduced-motion: reduce) {
    .btn:hover {
        transform: none;
    }
}

/* ---------- Hero görseli: altı A4 karosu ---------- */

.sheets {
    position: relative;
    aspect-ratio: 3 / 2;
    filter: drop-shadow(0 26px 45px oklch(0 0 0 / 0.42));
}

.sheets svg {
    width: 100%;
    height: 100%;
}

.sheet-tile {
    opacity: 1;
    transform-box: fill-box;
    transform-origin: center;
}

@media (prefers-reduced-motion: no-preference) {
    .js .sheet-tile {
        animation: tile-in 0.85s var(--ease) backwards;
        animation-delay: calc(var(--i) * 90ms);
    }
}

@keyframes tile-in {
    from {
        opacity: 0;
        transform: translateY(18px) scale(0.94);
    }
}

/* ---------- Bölüm iskeleti ---------- */

.section {
    padding-block: clamp(3.25rem, 2rem + 5vw, 6rem);
}

.section--tint {
    background: var(--paper-2);
    border-block: 1px solid var(--rule);
}

.section__head {
    max-width: 62ch;
}

.section h2 {
    font-size: clamp(1.75rem, 1.3rem + 1.9vw, 2.6rem);
    font-weight: 750;
    font-stretch: 105%;
}

.section__head p {
    margin: 0.9rem 0 0;
    font-size: 1.0625rem;
    color: var(--ink-2);
}

/* ---------- Sünme kanıtı ---------- */

.proof-pair {
    display: grid;
    gap: 1.5rem;
    margin-top: 2.5rem;
}

@media (min-width: 720px) {
    .proof-pair {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
}

.proof-case figcaption {
    display: flex;
    align-items: baseline;
    gap: 0.55rem;
    margin-top: 0.9rem;
    font-size: 0.9375rem;
    color: var(--ink-2);
}

.proof-case b {
    color: var(--ink);
    font-weight: 650;
}

.proof-case--bad b {
    color: var(--red-ink);
}

.proof-frame {
    border: 1px solid var(--rule-strong);
    background: var(--paper);
    padding: 0.75rem;
}

/* ---------- Adımlar ---------- */

.steps {
    counter-reset: step;
    margin: 2.75rem 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 0;
}

.steps li {
    counter-increment: step;
    display: grid;
    grid-template-columns: 3.25rem 1fr;
    gap: 0 1.35rem;
    padding-block: 1.5rem;
    border-top: 1px solid var(--rule);
}

.steps li:last-child {
    border-bottom: 1px solid var(--rule);
}

.steps li::before {
    content: counter(step, decimal-leading-zero);
    font-variant-numeric: tabular-nums;
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--blue);
    padding-top: 0.1rem;
}

.steps h3 {
    font-size: 1.2rem;
    font-weight: 650;
}

.steps p {
    margin: 0.45rem 0 0;
    color: var(--ink-2);
    max-width: 60ch;
}

/* ---------- İki mod ---------- */

.modes {
    display: grid;
    gap: clamp(2.5rem, 1rem + 5vw, 4rem);
    margin-top: 2.75rem;
}

.mode {
    display: grid;
    gap: 1.75rem;
    align-items: center;
}

@media (min-width: 860px) {
    .mode {
        grid-template-columns: 1fr 1.15fr;
    }

    .mode--flip > figure {
        order: -1;
    }
}

.mode h3 {
    font-size: clamp(1.35rem, 1.1rem + 1vw, 1.75rem);
    font-weight: 700;
}

.mode p {
    margin: 0.85rem 0 0;
    color: var(--ink-2);
    max-width: 54ch;
}

.mode ul {
    margin: 1.15rem 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 0.5rem;
    font-size: 0.9688rem;
}

.mode li {
    padding-left: 1.5rem;
    position: relative;
    color: var(--ink-2);
}

.mode li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.62em;
    width: 0.6rem;
    height: 0.6rem;
    border: 2px solid var(--blue);
    border-radius: 50%;
}

.shot {
    margin: 0;
    border: 1px solid var(--rule-strong);
    background: var(--paper);
    padding: 0.5rem;
    box-shadow: 0 18px 34px -22px oklch(0.216 0.021 265 / 0.55);
}

.shot img {
    width: 100%;
    height: auto;
}

.shot figcaption {
    padding: 0.7rem 0.35rem 0.15rem;
    font-size: 0.8438rem;
    color: var(--ink-2);
}

/* ---------- Özellik künyesi ---------- */

.specs {
    margin: 2.5rem 0 0;
    display: grid;
    gap: 0;
}

@media (min-width: 780px) {
    .specs {
        grid-template-columns: 1fr 1fr;
        column-gap: 3rem;
    }
}

.spec {
    display: grid;
    grid-template-columns: 1.35rem 1fr;
    gap: 0.9rem;
    padding-block: 1.15rem;
    border-top: 1px solid var(--rule);
}

.spec svg {
    width: 1.35rem;
    height: 1.35rem;
    color: var(--blue);
    margin-top: 0.15rem;
}

.spec h3 {
    font-size: 1.0313rem;
    font-weight: 650;
}

.spec p {
    margin: 0.3rem 0 0;
    font-size: 0.9375rem;
    color: var(--ink-2);
}

/* ---------- İndirme ---------- */

.downloads {
    margin: 2.5rem 0 0;
    border-top: 1px solid var(--rule-strong);
}

.dl {
    display: grid;
    grid-template-columns: 2.5rem minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.5rem 1.15rem;
    padding-block: 1.35rem;
    border-bottom: 1px solid var(--rule);
}

.dl svg.os {
    width: 1.75rem;
    height: 1.75rem;
    color: var(--ink-2);
}

.dl__name {
    font-weight: 650;
    font-size: 1.0625rem;
}

.dl__meta {
    margin: 0.15rem 0 0;
    font-size: 0.875rem;
    color: var(--ink-2);
    font-variant-numeric: tabular-nums;
}

@media (max-width: 600px) {
    .dl {
        grid-template-columns: 2.5rem minmax(0, 1fr);
    }

    .dl .btn {
        grid-column: 2;
        justify-self: start;
    }
}

.dl-note {
    margin: 1.5rem 0 0;
    font-size: 0.9375rem;
    color: var(--ink-2);
    max-width: 68ch;
}

/* ---------- SSS ---------- */

.faq {
    margin: 2.25rem 0 0;
    border-top: 1px solid var(--rule);
}

.faq details {
    border-bottom: 1px solid var(--rule);
}

.faq summary {
    display: flex;
    align-items: baseline;
    gap: 0.85rem;
    padding-block: 1.2rem;
    cursor: pointer;
    font-weight: 650;
    font-size: 1.0625rem;
    list-style: none;
}

.faq summary::-webkit-details-marker {
    display: none;
}

.faq summary::before {
    content: "+";
    color: var(--blue);
    font-weight: 700;
    font-size: 1.25rem;
    line-height: 1;
    transform: translateY(0.1em);
}

.faq details[open] summary::before {
    content: "–";
}

.faq p {
    margin: 0 0 1.35rem 1.7rem;
    color: var(--ink-2);
    max-width: 68ch;
}

/* ---------- Alt bilgi ---------- */

.site-foot {
    background: var(--blue-deeper);
    color: oklch(1 0 0 / 0.72);
    padding-block: 3rem;
    font-size: 0.9375rem;
}

.site-foot a {
    color: var(--paper);
}

.site-foot__in {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem 2.5rem;
    align-items: baseline;
    justify-content: space-between;
}

.site-foot p {
    margin: 0;
    max-width: 52ch;
}

.foot-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
}