:root {
    --bg-main: #0d1726;
    --bg-secondary: #132033;
    --bg-card: rgba(20, 32, 51, 0.90);
    --bg-card-strong: rgba(24, 39, 62, 0.96);

    --border: rgba(110, 163, 255, 0.18);
    --border-strong: rgba(110, 163, 255, 0.34);

    --text-main: #f4f8ff;
    --text-soft: #bfd0ea;
    --text-muted: #8ea1bb;

    --accent: #63adff;
    --accent-strong: #3d88ea;
    --accent-soft: rgba(99, 173, 255, 0.14);

    --success: #87dcff;
    --warning: #8fcbff;

    --shadow-main: 0 20px 60px rgba(0, 0, 0, 0.28);
    --radius-sm: 12px;
    --radius-md: 18px;
    --radius-lg: 24px;

    --container: 1200px;
    --transition: 0.25s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background:
        radial-gradient(circle at top, rgba(87, 145, 255, 0.18), transparent 35%),
        linear-gradient(180deg, #132033 0%, #0f1b2d 45%, #0b1523 100%);
    color: var(--text-main);
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.6;
    min-height: 100vh;
}

body.modal-open {
    overflow: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font: inherit;
    border: none;
    outline: none;
    background: none;
    cursor: pointer;
}

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

.container {
    width: min(calc(100% - 32px), var(--container));
    margin: 0 auto;
}

.narrow-container {
    max-width: 900px;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    line-height: 1.2;
    text-align: center;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-text {
    color: var(--text-soft);
    font-size: 1rem;
    text-align: center;
    max-width: 850px;
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(14px);
    background: rgba(10, 18, 30, 0.78);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.header-inner {
    min-height: 78px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.site-logo {
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--text-main);
    white-space: nowrap;
}

.desktop-nav {
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-link {
    color: var(--text-soft);
    padding: 10px 14px;
    border-radius: 10px;
    transition: var(--transition);
    font-size: 0.96rem;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.06);
}

.menu-toggle {
    display: none;
    width: 48px;
    height: 48px;
    border-radius: 12px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    background: rgba(255, 255, 255, 0.04);
    transition: var(--transition);
}

.menu-toggle:hover {
    background: rgba(255, 255, 255, 0.08);
}

.menu-toggle span {
    width: 20px;
    height: 2px;
    background: var(--text-main);
    border-radius: 50px;
    transition: var(--transition);
}

.mobile-nav {
    display: none;
    padding: 0 16px 16px;
    background: rgba(10, 18, 30, 0.96);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.mobile-nav.open {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mobile-nav-link {
    display: block;
    padding: 14px 16px;
    border-radius: 12px;
    color: var(--text-soft);
    background: rgba(255, 255, 255, 0.03);
    transition: var(--transition);
}

.mobile-nav-link:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.06);
}

.mobile-nav-link.active {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.06);
}

.hero-section {
    position: relative;
    padding: 120px 0 90px;
    background-image: 
        linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)),
        url("/assets/img/heroweb.png");

    background-size: cover;
    background-position: center bottom;
    background-repeat: no-repeat;
}

.hero-content {
    text-align: center;
    max-width: 900px;
}

.hero-title {
    font-size: clamp(3rem, 9vw, 6rem);
    line-height: 0.95;
    font-weight: 800;
    letter-spacing: -0.04em;
    margin-bottom: 20px;
    text-shadow: 0 0 25px rgba(78, 162, 255, 0.12);
}

.hero-subtitle {
    color: var(--text-soft);
    font-size: clamp(1rem, 2vw, 1.15rem);
    max-width: 680px;
    margin: 0 auto 30px;
}

.copy-ip-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 15px 28px;
    min-width: 240px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: #ffffff;
    font-weight: 700;
    box-shadow: 0 15px 40px rgba(47, 125, 225, 0.28);
    transition: var(--transition);
}

.copy-ip-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 44px rgba(47, 125, 225, 0.38);
}

.copy-ip-feedback {
    margin-top: 14px;
    color: var(--success);
    font-size: 0.95rem;
    opacity: 0;
    transform: translateY(5px);
    transition: var(--transition);
}

.copy-ip-feedback.show {
    opacity: 1;
    transform: translateY(0);
}

.construction-section,
.about-section,
.modes-section {
    padding: 35px 0 70px;
}

.construction-box {
    background: linear-gradient(180deg, rgba(24, 39, 62, 0.92), rgba(18, 31, 50, 0.96));
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    box-shadow: var(--shadow-main);
    text-align: center;
}

.construction-badge {
    display: inline-block;
    margin-bottom: 16px;
    padding: 8px 14px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    border-radius: 999px;
    color: #dff1ff;
    background: rgba(78, 162, 255, 0.12);
    border: 1px solid rgba(78, 162, 255, 0.18);
}

.modes-intro {
    margin-bottom: 28px;
}

.modes-slider-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    gap: 18px;
}

.modes-slider {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: calc((100% - 36px) / 3);
    gap: 18px;
    overflow: hidden;
    scroll-behavior: smooth;
    width: 100%;
}

.mode-card {
    background: linear-gradient(180deg, #07182f 0%, #031022 100%);
    border-radius: 34px;
    overflow: hidden;
    border: 1px solid rgba(122, 177, 255, 0.12);
    display: flex;
    flex-direction: column;
    min-height: 430px;
    transition: var(--transition);
    cursor: pointer;
}

.mode-card:hover {
    transform: translateY(-4px);
    border-color: rgba(122, 177, 255, 0.22);
}

.mode-card-image {
    min-height: 170px;
    height: 170px;
    background:
        linear-gradient(180deg, rgba(10, 28, 55, 0.85), rgba(4, 16, 34, 0.95));
    overflow: hidden;
    flex-shrink: 0;
}

.mode-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.mode-card-image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    font-size: clamp(1rem, 2vw, 1.4rem);
    font-weight: 700;
    text-align: center;
    color: rgba(255, 255, 255, 0.85);
}

.mode-card-content {
    padding: 26px 22px 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.mode-card-title {
    font-size: 2rem;
    line-height: 1.1;
    margin-bottom: 14px;
    color: var(--text-main);
}

.mode-card-text {
    color: var(--text-main);
    font-size: 1rem;
    text-align: justify;
    text-justify: inter-word;
    display: -webkit-box;
    -webkit-line-clamp: 7;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.mode-read-more {
    margin-top: auto;
    padding-top: 18px;
    align-self: flex-start;
    color: #9fd2ff;
    font-weight: 700;
    font-size: 0.95rem;
    background: none;
    border: none;
    cursor: pointer;
}

.mode-read-more:hover {
    color: #c5e4ff;
}

.modes-arrow {
    width: 52px;
    height: 52px;
    flex: 0 0 52px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-main);
    font-size: 1.4rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.modes-arrow:hover {
    background: rgba(99, 173, 255, 0.15);
    border-color: rgba(99, 173, 255, 0.20);
    transform: scale(1.05);
}

.modes-arrow.hidden {
    opacity: 0.35;
    pointer-events: none;
}

.modes-empty {
    width: 100%;
    padding: 26px;
    text-align: center;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-soft);
}

.site-footer {
    padding: 26px 0 34px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    margin-top: 30px;
}

.footer-inner {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(3, 8, 16, 0.74);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 2000;
}

.modal-overlay.open {
    opacity: 1;
    visibility: visible;
}

.modal-box {
    position: relative;
    width: min(100%, 760px);
    background: linear-gradient(180deg, rgba(25, 40, 63, 0.98), rgba(14, 24, 40, 0.98));
    border: 1px solid var(--border-strong);
    border-radius: 24px;
    padding: 34px 24px 28px;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
    transform: translateY(16px) scale(0.98);
    transition: var(--transition);
}

.modal-overlay.open .modal-box {
    transform: translateY(0) scale(1);
}

.modal-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 42px;
    height: 42px;
    border-radius: 12px;
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.05);
    font-size: 1.6rem;
    line-height: 1;
    transition: var(--transition);
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.10);
}

.modal-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    margin-bottom: 14px;
    padding-right: 50px;
}

.modal-description {
    color: var(--text-soft);
    font-size: 1rem;
    white-space: pre-line;
    text-align: justify;
}

@media (max-width: 1024px) {
    .modes-slider {
        grid-auto-columns: calc((100% - 18px) / 2);
    }
}

@media (max-width: 900px) {
    .desktop-nav {
        display: none;
    }

    .menu-toggle {
        display: inline-flex;
    }

    .hero-section {
        padding: 100px 0 70px;
    }

    .construction-section,
    .about-section,
    .modes-section {
        padding: 25px 0 55px;
    }
}

@media (max-width: 700px) {
    .modes-slider-wrapper {
        gap: 10px;
    }

    .modes-slider {
        grid-auto-columns: 100%;
        gap: 14px;
    }

    .mode-card {
        min-height: 500px;
        border-radius: 26px;
    }

    .mode-card-image {
        min-height: 200px;
        height: 200px;
    }

    .mode-card-title {
        font-size: 1.7rem;
    }

    .modes-arrow {
        width: 44px;
        height: 44px;
        flex-basis: 44px;
        font-size: 1.1rem;
    }
}

@media (max-width: 640px) {
    .header-inner {
        min-height: 70px;
    }

    .site-logo {
        font-size: 1.05rem;
    }

    .hero-title {
        margin-bottom: 16px;
    }

    .hero-subtitle {
        margin-bottom: 24px;
    }

    .copy-ip-btn {
        width: 100%;
        max-width: 320px;
        padding: 14px 20px;
    }

    .construction-box,
    .modal-box {
        border-radius: 20px;
    }
}

.hero-banner {
    display: block;
    max-width: 420px;
    width: 90%;
    height: auto;
    margin: 0 auto 0px auto;
    object-fit: contain;
}

@media (max-width: 768px) {
    .hero-banner {
        max-width: 420px;
        width: 92%;
    }
}

@media (max-width: 480px) {
    .hero-banner {
        max-width: 320px;
    }
}