/* === LANDING-KZ.CSS === */
/* assets/css/landing-kz.css */
/* НАЗНАЧЕНИЕ: Специфические стили лендинга (hero, секции, header/footer) */
/* СВЯЗИ: требует kz-theme.css + kz-components.css */
/* РАЗМЕР: ~380 строк */

/* === HEADER (fixed) === */
.kz-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--header-h);
    background: color-mix(in oklch, var(--bg-primary), transparent 15%);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
    transition: background 0.3s, border-color 0.3s;
}
.kz-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}
.kz-logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--text-primary);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 18px;
    text-decoration: none;
}
.kz-logo-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--gradient-gold);
    color: oklch(15% 0.05 80);
    border-radius: 8px;
    font-weight: 800;
    font-size: 14px;
    letter-spacing: -0.5px;
}
.kz-logo-text {
    letter-spacing: -0.02em;
}
.kz-header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}
@media (max-width: 640px) {
    .kz-logo-text { display: none; }
    .kz-header-cta { padding: 10px 18px; font-size: 13px; }
}

/* === HERO === */
.kz-hero {
    position: relative;
    min-height: 100vh;
    padding: calc(var(--header-h) + 32px) 24px 48px;
    background: var(--gradient-hero);
    overflow: hidden;
    display: flex;
    align-items: center;
}
.kz-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 20% 80%, var(--kz-gold-glow) 0%, transparent 50%),
        radial-gradient(ellipse 100% 60% at 80% 20%, oklch(45% 0.16 235 / 0.35) 0%, transparent 60%);
    pointer-events: none;
    z-index: 0;
}
.kz-hero-inner {
    position: relative;
    z-index: 2;
    width: 100%;
}
.kz-hero-content {
    max-width: 58%;
}
.kz-hero h1 {
    font-size: clamp(28px, 3.4vw, 48px);
    line-height: 1.1;
    margin: 14px 0 18px;
    font-weight: 700;
    letter-spacing: -0.025em;
}

@media (max-width: 1100px) {
    .kz-hero-content {
        max-width: 100%;
    }
}
.kz-hero-sub {
    font-size: clamp(16px, 1.3vw, 19px);
    color: var(--text-secondary);
    max-width: 680px;
    margin-bottom: 28px;
    line-height: 1.5;
}
.kz-eyebrow {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--kz-gold);
    padding: 8px 16px;
    border: 1px solid var(--border-gold);
    border-radius: 100px;
    background: color-mix(in oklch, var(--kz-gold), transparent 92%);
}
@media (max-width: 760px) {
    .kz-eyebrow {
        font-size: 10px;
        padding: 6px 12px;
        letter-spacing: 1px;
    }
}

/* Солнце в hero - ПОЛНОСТЬЮ видимое, золотого цвета, абсолютно справа */
.kz-hero-sun {
    position: absolute;
    top: 50%;
    right: 6%;
    transform: translateY(-50%);
    width: 440px;
    height: 440px;
    pointer-events: none;
    opacity: 1;
    filter: drop-shadow(0 0 120px rgba(254, 197, 12, 0.5));
    z-index: 1;
}
.kz-hero-sun img {
    width: 100%;
    height: 100%;
    animation: rotate 240s linear infinite;
    will-change: transform;
    display: block;
}
html.light-theme .kz-hero-sun {
    opacity: 0.9;
    filter: drop-shadow(0 0 80px rgba(254, 197, 12, 0.4));
}

/* На узких экранах (planshets) солнце в углу как декор */
@media (max-width: 1100px) {
    .kz-hero-sun {
        position: absolute;
        top: -120px;
        right: -160px;
        transform: none;
        width: 420px;
        height: 420px;
        opacity: 0.35;
        z-index: 0;
    }
}
/* Mobile - солнце ЕЩЁ дальше в угол, маленькое, за текстом */
@media (max-width: 760px) {
    .kz-hero-sun {
        width: 280px;
        height: 280px;
        top: -100px;
        right: -120px;
        opacity: 0.25;
    }
    .kz-hero {
        min-height: auto;
        padding: calc(var(--header-h) + 32px) 16px 48px;
    }
}

/* Орнамент слева */
.kz-ornament-left {
    position: absolute;
    top: 0; bottom: 0; left: 0;
    width: 60px;
    color: var(--kz-gold);
    opacity: 0.25;
    pointer-events: none;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}
.kz-ornament-left img {
    width: 100%;
    height: auto;
    max-height: 100%;
    object-fit: cover;
}
@media (max-width: 960px) { .kz-ornament-left { display: none; } }
html.light-theme .kz-ornament-left { opacity: 0.15; }

/* === СЕКЦИИ === */
.kz-section {
    padding: var(--section-pad);
    position: relative;
    background: var(--bg-primary);
}
.kz-section-advantages {
    background: var(--bg-secondary);
}
.kz-section-target {
    background: var(--bg-primary);
}
.kz-section + .kz-section {
    border-top: 1px solid var(--border);
}
.kz-section-title {
    text-align: center;
    max-width: 880px;
    margin: 0 auto 16px;
}
.kz-section-lead {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 56px;
    font-size: 18px;
    color: var(--text-secondary);
}
.kz-cta-wrap {
    display: flex;
    justify-content: center;
    margin-top: 56px;
}

/* === GRID === */
.kz-grid {
    display: grid;
    gap: 20px;
}
.kz-grid-1 { grid-template-columns: 1fr; max-width: 760px; margin: 0 auto; }
.kz-grid-2 { grid-template-columns: repeat(2, 1fr); max-width: 960px; margin: 0 auto; }
.kz-grid-3 { grid-template-columns: repeat(3, 1fr); }

@media (max-width: 880px) {
    .kz-grid-2, .kz-grid-3 { grid-template-columns: 1fr; }
}

/* Карточки "для кого" */
.kz-card-num {
    font-family: var(--font-mono);
    font-size: 14px;
    font-weight: 600;
    color: var(--kz-gold);
    letter-spacing: 1px;
    margin-bottom: 12px;
    text-transform: uppercase;
}

/* === Секция БОЛЕЙ (темнее) === */
.kz-section-pains {
    background: linear-gradient(180deg, var(--bg-primary) 0%, oklch(9% 0.06 240) 100%);
}
html.light-theme .kz-section-pains {
    background: linear-gradient(180deg, var(--bg-primary) 0%, oklch(94% 0.02 240) 100%);
}
.kz-grid-pains { gap: 12px; }

/* === Секция РЕЗУЛЬТАТОВ === */
.kz-section-results {
    background: var(--gradient-night);
}
.kz-results-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 820px;
    margin: 0 auto;
}

/* === Секция РЕГИСТРАЦИИ === */
.kz-section-register {
    background:
        radial-gradient(circle at center, color-mix(in oklch, var(--kz-gold), transparent 94%) 0%, transparent 60%),
        var(--bg-primary);
    padding-top: 96px;
    padding-bottom: 128px;
}
.kz-section-register .kz-section-title {
    margin-bottom: 16px;
}
.kz-section-register .kz-form {
    margin-top: 40px;
}

/* === FOOTER === */
.kz-footer {
    padding: 56px 24px 32px;
    background: oklch(8% 0.04 240);
    border-top: 1px solid var(--border);
}
html.light-theme .kz-footer {
    background: oklch(94% 0.015 230);
}
.kz-footer-inner {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 32px;
    align-items: start;
}
.kz-footer-brand .kz-logo { margin-bottom: 12px; }
.kz-footer-legal {
    font-size: 13px;
    color: var(--text-muted);
    margin: 0;
}
.kz-footer-nav {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.kz-footer-nav a {
    font-size: 14px;
    color: var(--text-secondary);
}
.kz-footer-nav a:hover { color: var(--kz-gold); }
.kz-footer-copy {
    font-size: 12px;
    color: var(--text-muted);
    text-align: right;
    align-self: end;
}
@media (max-width: 760px) {
    .kz-footer-inner {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .kz-footer-copy { text-align: left; }
}

/* === Анимации появления (hero - cразу, scroll-reveal - при скролле) === */
.hero-item {
    opacity: 0;
    animation: fade-up 0.8s var(--ease-out-quart) both;
}
.hero-item:nth-child(1) { animation-delay: 0.1s; }
.hero-item:nth-child(2) { animation-delay: 0.25s; }
.hero-item:nth-child(3) { animation-delay: 0.4s; }
.hero-item:nth-child(4) { animation-delay: 0.55s; }
.hero-item:nth-child(5) { animation-delay: 0.7s; }

/* Scroll reveal - ЕДИНЫЙ путь через IntersectionObserver (CSS-only broken in some browsers) */
.scroll-reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s var(--ease-out-quart), transform 0.7s var(--ease-out-quart);
    will-change: opacity, transform;
}
.scroll-reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}
/* Если JS выключен - показываем все сразу (no-JS fallback) */
.no-js .scroll-reveal {
    opacity: 1;
    transform: none;
}

/* === Button states для submit === */
#kz-submit.loading .btn-text { display: none; }
#kz-submit.loading .btn-loader { display: inline; }
#kz-submit:disabled { opacity: 0.7; cursor: wait; }

/* === Success state после отправки === */
.kz-form.success .kz-form-group,
.kz-form.success #kz-submit,
.kz-form.success .kz-form-hint {
    display: none;
}
.kz-form-success {
    display: none;
    text-align: center;
    padding: 40px 24px;
    background: var(--gradient-card);
    border: 1px solid var(--border-gold);
    border-radius: 8px;
}
.kz-form.success .kz-form-success { display: block; }
.kz-form-success h3 {
    color: var(--kz-gold);
    margin: 16px 0 12px;
    font-family: var(--font-display);
}
.kz-form-success p { color: var(--text-secondary); }

/* === Небольшой polish === */
html { scroll-padding-top: calc(var(--header-h) + 16px); }