/* Landing page — industrial product stage for ZeroStack Portal */

.landing-page {
    --landing-ink: #0b1220;
    --landing-steel: #1a2740;
    --landing-mist: #9fb0c7;
    --landing-glow: color-mix(in srgb, var(--color-accent) 55%, transparent);
    --landing-font-display: "Syne", "Segoe UI", sans-serif;
    --landing-font-body: "IBM Plex Sans", "Segoe UI", sans-serif;
    --landing-hero-title: #e2e8f0;
    --landing-hero-lead: var(--landing-mist);
    --landing-hero-brand: #f8fafc;
    --landing-ghost-border: color-mix(in srgb, #e2e8f0 28%, transparent);
    --landing-ghost-bg: color-mix(in srgb, #0f172a 35%, transparent);
    --landing-ghost-color: #f1f5f9;
    --landing-stage-shadow: drop-shadow(0 28px 50px rgba(2, 12, 27, 0.55));
    font-family: var(--landing-font-body);
    color: var(--color-text-primary);
}

[data-theme="light"] .landing-page {
    --landing-ink: #eef3f8;
    --landing-steel: #e2ebf4;
    --landing-mist: #4a5d73;
    --landing-glow: color-mix(in srgb, var(--color-accent) 35%, transparent);
    --landing-hero-title: #0f172a;
    --landing-hero-lead: #4a5568;
    --landing-hero-brand: #0c4a6e;
    --landing-ghost-border: #cbd5e1;
    --landing-ghost-bg: rgba(255, 255, 255, 0.72);
    --landing-ghost-color: #1e293b;
    --landing-stage-shadow: drop-shadow(0 24px 40px rgba(15, 23, 42, 0.18));
}

.landing-page h1,
.landing-page h2,
.landing-page h3,
.landing-page .landing-brand {
    font-family: var(--landing-font-display);
}

/* ---------- Hero ---------- */
.landing-hero {
    position: relative;
    isolation: isolate;
    min-height: 0;
    display: grid;
    align-items: start;
    overflow: hidden;
    /* Full-bleed только внутри main: компенсируем его padding.
       Не используем 100vw / (50% - 50vw) — при сайдбаре hero уезжает под меню. */
    width: auto;
    max-width: none;
    margin-left: -0.75rem; /* p-3 на #main-content */
    margin-right: -0.75rem;
    margin-top: -0.75rem;
    padding: clamp(1.25rem, 3vh, 2rem) clamp(1rem, 4vw, 2.5rem) clamp(1.75rem, 4vh, 2.75rem);
    background:
        radial-gradient(ellipse 80% 60% at 70% 20%, color-mix(in srgb, var(--color-accent) 18%, transparent), transparent 55%),
        radial-gradient(ellipse 50% 40% at 15% 80%, color-mix(in srgb, #0ea5e9 10%, transparent), transparent 50%),
        linear-gradient(165deg, var(--landing-ink) 0%, var(--landing-steel) 48%, #0f172a 100%);
    color: var(--landing-hero-brand);
}

@media (min-width: 640px) {
    .landing-hero {
        margin-left: -1rem; /* sm:p-4 */
        margin-right: -1rem;
        margin-top: -1rem;
    }
}

@media (min-width: 768px) {
    .landing-hero {
        margin-left: -1.25rem; /* md:p-5 */
        margin-right: -1.25rem;
        margin-top: -1.25rem;
    }
}

@media (min-width: 1024px) {
    .landing-hero {
        margin-left: -1.5rem; /* lg:p-6 */
        margin-right: -1.5rem;
        margin-top: -1.5rem;
        min-height: min(72vh, 36rem);
        align-items: center;
        padding-top: clamp(1.5rem, 3vh, 2.25rem);
        padding-bottom: clamp(1.5rem, 3vh, 2.25rem);
    }
}

@media (min-width: 1280px) {
    .landing-hero {
        margin-left: -2rem; /* xl:p-8 */
        margin-right: -2rem;
        margin-top: -2rem;
    }
}

[data-theme="light"] .landing-hero {
    background:
        radial-gradient(ellipse 70% 55% at 78% 12%, color-mix(in srgb, var(--color-accent) 16%, transparent), transparent 58%),
        radial-gradient(ellipse 50% 40% at 8% 88%, color-mix(in srgb, #38bdf8 14%, transparent), transparent 52%),
        linear-gradient(165deg, #f7fafc 0%, #eef4fa 42%, #e4eef7 100%);
    color: var(--landing-hero-brand);
    border-bottom: 1px solid color-mix(in srgb, var(--color-border) 90%, transparent);
}

.landing-hero__grid {
    position: absolute;
    inset: 0;
    z-index: 0;
    background-image:
        linear-gradient(color-mix(in srgb, #94a3b8 12%, transparent) 1px, transparent 1px),
        linear-gradient(90deg, color-mix(in srgb, #94a3b8 12%, transparent) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse 70% 65% at 60% 45%, #000 20%, transparent 75%);
    opacity: 0.35;
    pointer-events: none;
}

[data-theme="light"] .landing-hero__grid {
    background-image:
        linear-gradient(color-mix(in srgb, #64748b 14%, transparent) 1px, transparent 1px),
        linear-gradient(90deg, color-mix(in srgb, #64748b 14%, transparent) 1px, transparent 1px);
    opacity: 0.28;
}

.landing-hero__content {
    position: relative;
    z-index: 2;
    max-width: 42rem;
    display: grid;
    gap: 1.25rem;
}

.landing-brand {
    margin: 0;
    font-size: clamp(3rem, 9vw, 6.5rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 0.92;
    color: var(--landing-hero-brand);
    animation: landing-rise 0.9s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.landing-brand__accent {
    color: #38bdf8;
}

.landing-hero__title {
    margin: 0;
    max-width: 22ch;
    font-size: clamp(1.25rem, 2.6vw, 1.85rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.25;
    color: var(--landing-hero-title);
    animation: landing-rise 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.08s both;
}

.landing-hero__lead {
    margin: 0;
    max-width: 38ch;
    font-size: clamp(1rem, 1.5vw, 1.125rem);
    line-height: 1.55;
    color: var(--landing-hero-lead);
    animation: landing-rise 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.14s both;
}

.landing-hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 0.5rem;
    animation: landing-rise 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.2s both;
}

.landing-hero__actions .btn-primary {
    min-height: 3rem;
    padding: 0.75rem 1.35rem;
    border-radius: 0.65rem;
    font-size: 1rem;
    box-shadow: 0 12px 30px -12px var(--landing-glow);
}

[data-theme="light"] .landing-hero__actions .btn-primary {
    box-shadow: 0 10px 24px -10px color-mix(in srgb, var(--color-accent) 45%, transparent);
}

.landing-btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 3rem;
    padding: 0.75rem 1.35rem;
    border-radius: 0.65rem;
    border: 1px solid var(--landing-ghost-border);
    background: var(--landing-ghost-bg);
    color: var(--landing-ghost-color);
    font-weight: 600;
    text-decoration: none;
    backdrop-filter: blur(8px);
    transition: border-color var(--transition-base), background-color var(--transition-base), color var(--transition-base);
}

.landing-btn-ghost:hover {
    border-color: color-mix(in srgb, var(--color-accent) 55%, transparent);
    background: color-mix(in srgb, #0f172a 55%, transparent);
    color: #fff;
}

[data-theme="light"] .landing-btn-ghost:hover {
    border-color: color-mix(in srgb, var(--color-accent) 50%, #94a3b8);
    background: #fff;
    color: #0f172a;
}

.landing-btn-ghost--on-surface {
    color: var(--color-text-primary);
    border-color: var(--color-border);
    background: var(--color-bg-primary);
}

.landing-btn-ghost--on-surface:hover {
    color: var(--color-text-primary);
    border-color: color-mix(in srgb, var(--color-accent) 45%, var(--color-border));
    background: var(--color-bg-tertiary);
}

.landing-hero__stage {
    position: absolute;
    z-index: 1;
    right: clamp(1.25rem, 4vw, 2.75rem);
    bottom: clamp(1rem, 4vh, 3rem);
    width: min(56vw, 38rem);
    pointer-events: none;
    animation: landing-float 7s ease-in-out infinite, landing-rise 1s cubic-bezier(0.22, 1, 0.36, 1) 0.18s both;
}

.landing-hero__stage img,
.landing-hero__stage svg {
    width: 100%;
    height: auto;
    display: block;
    filter: var(--landing-stage-shadow);
}

[data-theme="light"] .landing-hero__stage img,
[data-theme="light"] .landing-hero__stage svg {
    border-radius: 1rem;
    outline: 1px solid color-mix(in srgb, #94a3b8 35%, transparent);
}

@media (max-width: 900px) {
    /* Компактный стек: бренд → CTA → превью без пустой середины */
    .landing-hero {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        min-height: 0;
        padding-top: 1rem;
        padding-bottom: 0;
        gap: 0.65rem;
    }

    .landing-hero__content {
        gap: 0.65rem;
        max-width: none;
    }

    .landing-brand {
        font-size: clamp(2.4rem, 13vw, 3.4rem);
    }

    .landing-hero__title {
        max-width: none;
        font-size: clamp(1.1rem, 4.2vw, 1.35rem);
    }

    .landing-hero__lead {
        max-width: none;
        font-size: 0.95rem;
        line-height: 1.45;
    }

    .landing-hero__actions {
        gap: 0.55rem;
        margin-top: 0.1rem;
    }

    .landing-hero__actions .btn-primary,
    .landing-btn-ghost {
        min-height: 2.65rem;
        padding: 0.6rem 1rem;
        font-size: 0.92rem;
    }

    .landing-hero__stage {
        position: relative;
        right: auto;
        bottom: auto;
        width: calc(100% + 2 * clamp(1rem, 4vw, 2.5rem));
        margin: 0.15rem 0 0;
        margin-left: calc(-1 * clamp(1rem, 4vw, 2.5rem));
        margin-right: calc(-1 * clamp(1rem, 4vw, 2.5rem));
        flex: 0 0 auto;
        animation: landing-rise 1s cubic-bezier(0.22, 1, 0.36, 1) 0.18s both;
    }

    .landing-hero__stage img,
    .landing-hero__stage svg {
        width: 100%;
        height: auto;
        display: block;
        border-radius: 1rem 1rem 0 0;
        filter: var(--landing-stage-shadow);
    }
}

/* ---------- Sections ---------- */
.landing-section {
    padding: clamp(3rem, 7vh, 5rem) 0;
}

/* После hero — меньше «дыры» перед блоком модулей */
.landing-hero + .landing-section {
    padding-top: clamp(1.75rem, 4vh, 2.75rem);
}

.landing-section__head {
    max-width: 40rem;
    margin: 0 auto clamp(2rem, 4vh, 3rem);
    text-align: center;
}

.landing-section__head h2 {
    margin: 0 0 0.65rem;
    font-size: clamp(1.65rem, 3vw, 2.35rem);
    font-weight: 750;
    letter-spacing: -0.03em;
    color: var(--color-text-primary);
}

.landing-section__head p {
    margin: 0;
    color: var(--color-text-secondary);
    font-size: 1.05rem;
    line-height: 1.55;
}

.landing-prose {
    max-width: 48rem;
    margin: 0 auto;
    color: var(--color-text-secondary);
    font-size: 1.05rem;
    line-height: 1.7;
}

.landing-prose p + p {
    margin-top: 1rem;
}

.landing-prose ul {
    margin: 1.25rem 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 0.85rem;
}

.landing-prose li {
    position: relative;
    padding-left: 1.35rem;
}

.landing-prose li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.55em;
    width: 0.45rem;
    height: 0.45rem;
    border-radius: 50%;
    background: var(--color-accent);
}

.landing-advantages {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.25rem 2rem;
    margin-top: 2rem;
}

@media (max-width: 640px) {
    .landing-advantages {
        grid-template-columns: 1fr;
    }
}

.landing-advantages h3 {
    margin: 0 0 0.35rem;
    font-size: 1.05rem;
    color: var(--color-text-primary);
}

.landing-advantages p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--color-text-tertiary);
    line-height: 1.5;
}

/* ---------- FAQ ---------- */
.landing-faq {
    max-width: 48rem;
    margin: 0 auto;
    display: grid;
    gap: 0.65rem;
}

.landing-faq details {
    border-bottom: 1px solid var(--color-border);
    padding: 0.85rem 0;
}

.landing-faq summary {
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    font-family: var(--landing-font-display);
    font-weight: 650;
    font-size: 1.05rem;
    color: var(--color-text-primary);
}

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

.landing-faq summary::after {
    content: "+";
    flex-shrink: 0;
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-accent);
    transition: transform var(--transition-base);
}

.landing-faq details[open] summary::after {
    content: "−";
}

.landing-faq details p {
    margin: 0.75rem 0 0.25rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    font-size: 0.98rem;
}

/* ---------- Modules / news ---------- */
/* Каталог-строки вместо сетки карточек — меньше визуального шума */
.landing-modules {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0;
    border-top: 1px solid var(--color-border);
}

@media (max-width: 720px) {
    .landing-modules {
        grid-template-columns: 1fr;
    }

    .landing-module {
        grid-template-columns: auto minmax(0, 1fr);
        padding-right: 0;
    }

    .landing-module__link {
        grid-column: 2;
        justify-self: start;
        align-self: start;
    }
}

.landing-module {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: start;
    gap: 0.85rem 1rem;
    padding: 1.1rem 0.35rem 1.1rem 0;
    border-bottom: 1px solid var(--color-border);
    border-radius: 0;
    background: transparent;
    text-decoration: none;
    color: inherit;
    transition: background-color var(--transition-base), padding-left var(--transition-base);
}

@media (min-width: 721px) {
    .landing-module:nth-child(odd) {
        padding-right: 1.25rem;
        border-right: 1px solid var(--color-border);
    }

    .landing-module:nth-child(even) {
        padding-left: 1.25rem;
    }
}

.landing-module:hover {
    background: color-mix(in srgb, var(--color-accent) 6%, transparent);
    transform: none;
    box-shadow: none;
}

.landing-module__icon {
    width: 2.15rem;
    height: 2.15rem;
    display: grid;
    place-items: center;
    border-radius: 0.5rem;
    background: color-mix(in srgb, var(--color-accent) 14%, transparent);
    color: var(--color-accent);
    font-size: 0.95rem;
}

.landing-module__body {
    min-width: 0;
    display: grid;
    gap: 0.3rem;
}

.landing-module h3 {
    margin: 0;
    font-size: 1.05rem;
    line-height: 1.25;
    color: var(--color-text-primary);
}

.landing-module p {
    margin: 0;
    font-size: 0.88rem;
    line-height: 1.45;
    color: var(--color-text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.landing-module__link {
    align-self: center;
    color: var(--color-accent);
    font-size: 0.85rem;
    font-weight: 600;
    white-space: nowrap;
    opacity: 0.85;
    transition: opacity var(--transition-base), transform var(--transition-base);
}

.landing-module:hover .landing-module__link {
    opacity: 1;
    transform: translateX(2px);
}

.landing-news {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 18rem), 1fr));
    gap: 1.25rem 1.75rem;
}

.landing-news article {
    display: grid;
    gap: 0.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
}

.landing-news time {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
}

.landing-news h3 {
    margin: 0;
    font-size: 1.1rem;
    line-height: 1.35;
}

.landing-news h3 a {
    color: var(--color-text-primary);
    text-decoration: none;
}

.landing-news h3 a:hover {
    color: var(--color-accent);
}

.landing-news p {
    margin: 0;
    font-size: 0.92rem;
    line-height: 1.5;
    color: var(--color-text-secondary);
}

/* ---------- CTA band ---------- */
.landing-cta {
    margin: 1rem 0 2rem;
    padding: clamp(2rem, 5vw, 3rem);
    border-radius: 1.25rem;
    background:
        radial-gradient(ellipse 60% 80% at 90% 20%, color-mix(in srgb, var(--color-accent) 18%, transparent), transparent 55%),
        var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    text-align: center;
}

[data-theme="light"] .landing-cta {
    background:
        radial-gradient(ellipse 70% 90% at 92% 10%, color-mix(in srgb, var(--color-accent) 12%, transparent), transparent 55%),
        #ffffff;
    box-shadow: var(--shadow-md, 0 8px 24px -16px rgba(15, 23, 42, 0.2));
}

.landing-cta h2 {
    margin: 0 0 0.65rem;
    font-size: clamp(1.5rem, 3vw, 2rem);
}

.landing-cta p {
    margin: 0 auto 1.35rem;
    max-width: 36rem;
    color: var(--color-text-secondary);
}

.landing-cta__actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
}

[data-theme="light"] .landing-module:hover {
    background: color-mix(in srgb, var(--color-accent) 5%, #ffffff);
}

/* ---------- Motion ---------- */
@keyframes landing-rise {
    from {
        opacity: 0;
        transform: translateY(1.1rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes landing-float {
    0%,
    100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes landing-pulse {
    0%,
    100% {
        opacity: 1;
    }
    50% {
        opacity: 0.45;
    }
}

.landing-pulse {
    animation: landing-pulse 2.4s ease-in-out infinite;
}

@media (prefers-reduced-motion: reduce) {
    .landing-brand,
    .landing-hero__title,
    .landing-hero__lead,
    .landing-hero__actions,
    .landing-hero__stage,
    .landing-pulse {
        animation: none !important;
    }
}