:root {
    --bg-color: #000000;
    --text-color: #ffffff;
    --accent-color: #ffffff;
    --muted-color: #aaaaaa;
    --border-color: #333333;
    --transition-fast: 0.25s ease;
    --container-width: 1100px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.7;
}

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

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

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* HEADER */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(18px);
    background: rgba(0,0,0,0.8);
    border-bottom: 1px solid transparent;
    transition: background var(--transition-fast), border-color var(--transition-fast), padding var(--transition-fast);
}

header.scrolled {
    background: rgba(0,0,0,0.95);
    border-color: var(--border-color);
    padding-block: 0.4rem;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    padding-block: 0.9rem;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-logo {
    width: 120px;
    height: auto;
}

.nav-brand-text {
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-size: 0.85rem;
    color: var(--muted-color);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    font-size: 0.95rem;
}

.nav-menu a {
    position: relative;
    padding-block: 0.25rem;
}

.nav-menu a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 1px;
    background: var(--accent-color);
    transition: width var(--transition-fast);
}

.nav-menu a:hover::after {
    width: 100%;
}

.lang-switch {
    border: 1px solid var(--border-color);
    padding: 0.25rem 0.7rem;
    border-radius: 999px;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    cursor: pointer;
    background: transparent;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.lang-switch span {
    opacity: 0.6;
}

.lang-switch span.active {
    opacity: 1;
    font-weight: 600;
}

/* HERO */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    background: radial-gradient(circle at top, #111 0, #000 55%);
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1.2fr);
    gap: 2.5rem;
    align-items: center;
}

.hero-kicker {
    font-size: 0.85rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--muted-color);
    margin-bottom: 0.75rem;
}

.hero-title {
    font-size: clamp(2.1rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero-subtitle {
    color: var(--muted-color);
    max-width: 32rem;
    margin-bottom: 1.75rem;
    font-size: 0.98rem;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.btn {
    border-radius: 999px;
    padding: 0.7rem 1.4rem;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid transparent;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-primary {
    background: #ffffff;
    color: #000000;
    border-color: #ffffff;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 16px 40px rgba(0,0,0,0.7);
}

.btn-ghost {
    background: transparent;
    color: #ffffff;
    border-color: var(--border-color);
}

.btn-ghost:hover {
    border-color: #ffffff;
    background: rgba(255,255,255,0.06);
}

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    color: var(--muted-color);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

.hero-meta span::before {
    content: "●";
    font-size: 0.4rem;
    margin-inline-end: 0.5rem;
}

.hero-device {
    position: relative;
    justify-self: center;
}

.device-frame {
    width: 260px;
    aspect-ratio: 9 / 19;
    border-radius: 30px;
    border: 1px solid #333;
    background: radial-gradient(circle at top, #222, #000);
    padding: 0.65rem;
    box-shadow: 0 24px 60px rgba(0,0,0,0.9);
    position: relative;
    overflow: hidden;
}

.device-inner {
    width: 100%;
    height: 100%;
    border-radius: 23px;
    overflow: hidden;
    background: linear-gradient(160deg,#111,#000);
    border: 1px solid #222;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--muted-color);
    font-size: 0.8rem;
    text-align: center;
    padding: 1rem;
}

.device-tag {
    position: absolute;
    bottom: -0.5rem;
    right: -0.3rem;
    background: #ffffff;
    color: #000;
    font-size: 0.7rem;
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    box-shadow: 0 14px 32px rgba(0,0,0,0.8);
}

/* SECTIONS */
section {
    padding-block: 4.5rem;
    border-bottom: 1px solid var(--border-color);
}

.section-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.section-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--muted-color);
    margin-bottom: 0.5rem;
}

.section-title {
    font-size: 1.8rem;
    margin-bottom: 0.6rem;
}

.section-subtitle {
    color: var(--muted-color);
    max-width: 34rem;
    margin: 0 auto;
    font-size: 0.96rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
}

.feature-card {
    border-radius: 18px;
    border: 1px solid var(--border-color);
    padding: 1.5rem 1.3rem;
    background: radial-gradient(circle at top left, #141414 0, #050505 55%);
    box-shadow: 0 18px 40px rgba(0,0,0,0.7);
    position: relative;
    overflow: hidden;
}

.feature-tag {
    position: absolute;
    top: 1.2rem;
    right: 1.3rem;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--muted-color);
    opacity: 0.6;
}

.feature-title {
    font-size: 1.05rem;
    margin-bottom: 0.5rem;
}

.feature-text {
    font-size: 0.9rem;
    color: var(--muted-color);
}

.two-columns {
    display: grid;
    grid-template-columns: repeat(2, minmax(0,1fr));
    gap: 1.8rem;
}

.pill-card {
    border-radius: 20px;
    border: 1px solid var(--border-color);
    padding: 1.6rem 1.4rem;
    background: linear-gradient(145deg,#070707,#101010);
    box-shadow: 0 18px 38px rgba(0,0,0,0.8);
}

.pill-title {
    font-size: 1.1rem;
    margin-bottom: 0.4rem;
}

.pill-list {
    margin-top: 0.7rem;
    font-size: 0.9rem;
    color: var(--muted-color);
}

.pill-list li {
    margin-bottom: 0.35rem;
}

.pill-list li::marker {
    color: #ffffff;
    font-size: 0.75rem;
}

.steps {
    display: grid;
    grid-template-columns: repeat(3,minmax(0,1fr));
    gap: 1.5rem;
}

.step-card {
    border-radius: 18px;
    border: 1px solid var(--border-color);
    padding: 1.5rem 1.3rem;
    background: #050505;
    position: relative;
    overflow: hidden;
}

.step-number {
    font-size: 0.8rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--muted-color);
    margin-bottom: 0.4rem;
}

.step-title {
    font-size: 1.05rem;
    margin-bottom: 0.5rem;
}

.step-text {
    font-size: 0.9rem;
    color: var(--muted-color);
}

.download-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 2rem;
    align-items: center;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.8rem;
    border-radius: 999px;
    font-size: 0.78rem;
    border: 1px solid var(--border-color);
    color: var(--muted-color);
    margin-bottom: 0.75rem;
}

.store-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.25rem;
}

.store-btn {
    border-radius: 999px;
    border: 1px solid var(--border-color);
    padding: 0.55rem 1.2rem;
    font-size: 0.86rem;
    display: inline-flex;
    flex-direction: column;
    min-width: 150px;
    background: #050505;
}

.store-btn span:first-child {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--muted-color);
}

.store-btn span:last-child {
    font-size: 0.98rem;
    margin-top: 0.15rem;
}

.store-btn.disabled {
    opacity: 0.4;
    cursor: default;
}

.qr-box {
    border-radius: 18px;
    border: 1px dashed var(--border-color);
    padding: 1.4rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--muted-color);
}

.screens-grid {
    display: grid;
    grid-template-columns: repeat(3,minmax(0,1fr));
    gap: 1.3rem;
}

.screen-card {
    border-radius: 18px;
    border: 1px solid var(--border-color);
    padding: 1rem;
    background: radial-gradient(circle at top,#181818,#050505);
    height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--muted-color);
    font-size: 0.85rem;
    text-align: center;
}

/* CONTACT */
.contact-grid {
    display: grid;
    grid-template-columns: minmax(0,1.3fr) minmax(0,1fr);
    gap: 2rem;
}

.contact-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.contact-form .full {
    grid-column: 1 / -1;
}

label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--muted-color);
    margin-bottom: 0.25rem;
    display: block;
}

input, select, textarea {
    width: 100%;
    background: #050505;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    padding: 0.55rem 0.9rem;
    color: var(--text-color);
    font-size: 0.88rem;
    outline: none;
    transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
}

textarea {
    border-radius: 18px;
    min-height: 120px;
    resize: vertical;
}

input:focus, select:focus, textarea:focus {
    border-color: #ffffff;
    box-shadow: 0 0 0 1px #ffffff10;
}

.contact-meta {
    font-size: 0.9rem;
    color: var(--muted-color);
}

.contact-meta p + p {
    margin-top: 0.4rem;
}

.contact-meta a {
    text-decoration: underline;
    text-decoration-style: dotted;
    text-underline-offset: 0.18em;
}

/* FOOTER */
footer {
    padding-block: 2.5rem;
    font-size: 0.85rem;
    color: var(--muted-color);
}

.footer-inner {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 1.25rem;
    align-items: center;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-links a {
    font-size: 0.85rem;
}

/* ANIMATIONS ON SCROLL */
.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* RESPONSIVE */
@media (max-width: 900px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-subtitle {
        margin-inline: auto;
    }
    .hero-meta {
        justify-content: center;
    }
    .hero-device {
        order: -1;
        margin-bottom: 1.5rem;
    }
    .device-frame {
        width: 220px;
    }
    .grid-3, .steps, .screens-grid {
        grid-template-columns: repeat(2, minmax(0,1fr));
    }
    .download-grid,
    .contact-grid,
    .two-columns {
        grid-template-columns: 1fr;
    }
    .contact-form {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .nav-menu {
        display: none;
    }
    .hero {
        padding-top: 2.5rem;
    }
    .grid-3, .steps, .screens-grid {
        grid-template-columns: 1fr;
    }
    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
    }
}