:root {
    --primary-color: #8A2BE2; 
    --primary-color-rgb: 138, 43, 226;
    --secondary-color: #FF00FF; 
    --secondary-color-rgb: 255, 0, 255;
    --text-color: #E0E0E0; 
    --text-color-darker: #c0c0c0; 
    --bg-color: #121212; 
    --surface-color: #1E1E1E; 
    --surface-color-alpha: rgba(30, 30, 30, 0.97); 
    --border-color: #333;
    --font-primary: 'Poppins', sans-serif;
    --font-headings: 'Orbitron', sans-serif;
    --spacing-unit: 8px;
    
    --header-height-mobile: 56px; /* Tailwind h-14 (3.5rem) */
    --header-height-desktop: 60px; /* Tailwind h-15 (3.75rem) - Slightly more than mobile */
    
    --footer-height: 120px; 
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.7;
    overflow-x: hidden; 
}

.container {
    width: 100%;
    max-width: 1100px; 
    margin-left: auto;
    margin-right: auto;
    padding-left: calc(var(--spacing-unit) * 2); 
    padding-right: calc(var(--spacing-unit) * 2); 
}
@media (min-width: 768px) {
    .container {
        padding-left: calc(var(--spacing-unit) * 3); 
        padding-right: calc(var(--spacing-unit) * 3); 
    }
}

.site-header {
    background-color: transparent; 
    transition: background-color 0.3s ease-in-out, 
                box-shadow 0.3s ease-in-out, 
                transform 0.4s ease-in-out,
                visibility 0.4s ease-in-out;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    visibility: visible;
}

.site-header.scrolled {
    background-color: rgba(18, 18, 18, 0.93); 
    backdrop-filter: blur(8px); 
    -webkit-backdrop-filter: blur(8px); 
    box-shadow: 0 1px 6px rgba(0,0,0,0.3), 0 0 12px rgba(var(--primary-color-rgb), 0.07);
}

.site-header--hidden {
    transform: translateY(-100%);
    visibility: hidden;
}

.site-header nav {
    height: var(--header-height-mobile); 
}
@media (min-width: 768px) { 
    .site-header nav {
        height: var(--header-height-desktop); 
    }
}

main {
    padding-top: var(--header-height-mobile);
}
@media (min-width: 768px) { 
    main {
        padding-top: var(--header-height-desktop);
    }
}

.nav-logo-wrapper img {
    transition: transform 0.3s ease;
}
.nav-logo-wrapper:hover img {
    transform: scale(1.10);
}
.nav-logo-wrapper .font-orbitron {
    transition: text-shadow 0.3s ease, color 0.3s ease;
}
.nav-logo-wrapper:hover .font-orbitron {
    text-shadow: 0 0 7px var(--primary-color), 0 0 9px var(--primary-color), 0 0 11px var(--secondary-color);
}

.nav-menu-desktop a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500; 
    padding: calc(var(--spacing-unit) * 0.625) calc(var(--spacing-unit) * 1); /* 5px 8px */
    border-radius: 4px; 
    transition: color 0.25s ease, background-color 0.25s ease, transform 0.2s ease;
    position: relative; 
    font-family: var(--font-primary); 
}

.nav-menu-desktop a:not(.btn):hover, 
.nav-menu-desktop a:not(.btn):focus {
    color: #ffffff; 
    background-color: rgba(var(--primary-color-rgb), 0.22); 
    transform: translateY(-1px);
    outline: none;
}

.nav-menu-desktop a.active { 
    color: var(--primary-color);
    font-weight: 500; 
}

#hamburger-button .line {
    transition: transform 0.3s cubic-bezier(0.68, -0.55, 0.27, 1.55), opacity 0.3s ease-in-out;
    transform-origin: center;
}
#hamburger-button.open .line1 {
    transform: translateY(6.5px) rotate(45deg); /* Adjusted for w-5 h-5 icon (20px), stroke 3 */
}                                             
#hamburger-button.open .line2 {
    opacity: 0;
    transform: translateX(-7px); 
}
#hamburger-button.open .line3 {
    transform: translateY(-6.5px) rotate(-45deg);
}

#mobile-menu {
    background-color: var(--surface-color-alpha); 
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    position: absolute; 
    top: 100%; 
    left: 0;
    right: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s cubic-bezier(0.23, 1, 0.32, 1), 
                padding-top 0.35s cubic-bezier(0.23, 1, 0.32, 1),
                padding-bottom 0.35s cubic-bezier(0.23, 1, 0.32, 1);
    padding-top: 0;
    padding-bottom: 0;
}

#mobile-menu.open {
    max-height: calc(100vh - var(--header-height-mobile)); 
    padding-top: calc(var(--spacing-unit) * 0.25); 
    padding-bottom: var(--spacing-unit); 
    border-top: 1px solid var(--border-color);
    box-shadow: 0 7px 14px rgba(0,0,0,0.22);
}

#mobile-menu a {
    display: block;
    padding: calc(var(--spacing-unit) * 1.25) calc(var(--spacing-unit) * 2.5); /* 10px 20px */
    color: var(--text-color);
    text-decoration: none;
    border-bottom: 1px solid rgba(var(--border-color), 0.25); 
    transition: background-color 0.2s ease, color 0.2s ease;
    font-size: 0.9rem; 
    text-align: center;
    font-weight: 500;
}
#mobile-menu a:last-child {
    border-bottom: none;
}

#mobile-menu a:hover, #mobile-menu a:focus {
    background-color: rgba(var(--primary-color-rgb), 0.22); 
    color: #ffffff;
}
#mobile-menu a.btn-primary-mobile { 
    background-color: var(--primary-color);
    color: #ffffff;
    margin: calc(var(--spacing-unit)*0.75) calc(var(--spacing-unit) * 2.5) calc(var(--spacing-unit)*0.75); 
    border-radius: 5px; 
    font-weight: 500;
    box-shadow: 0 1px 3px rgba(0,0,0,0.15);
    padding: var(--spacing-unit) calc(var(--spacing-unit) * 1.75); /* 8px 14px */
    font-size: 0.85rem;
}
#mobile-menu a.btn-primary-mobile:hover {
    background-color: var(--secondary-color);
    transform: translateY(-1px);
    box-shadow: 0 3px 6px rgba(var(--secondary-color-rgb),0.25);
}

.btn {
    padding: calc(var(--spacing-unit) * 1.125) calc(var(--spacing-unit) * 2.25); /* 9px 18px */
    border-radius: 5px; 
    text-decoration: none;
    font-weight: 500; /* Adjusted base weight */
    transition: all 0.25s ease-in-out; 
    display: inline-block;
    border: none;
    cursor: pointer;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #ffffff; 
    text-shadow: 0 1px 1px rgba(0,0,0,0.1); 
    box-shadow: 0 1px 2px rgba(0,0,0,0.08); 
}

.btn-primary:hover, .btn-primary:focus {
    background-color: var(--secondary-color); 
    color: #ffffff;
    transform: translateY(-1.5px) scale(1.015); 
    box-shadow: 0 0 7px 1px rgba(var(--primary-color-rgb), 0.4), 
                0 0 10px 2.5px rgba(var(--secondary-color-rgb), 0.25), 
                0 2.5px 5px rgba(0,0,0,0.18); 
    outline: 1.5px solid transparent; 
    outline-offset: 1.5px;
}

.nav-menu-desktop .btn-primary.btn-small { 
    padding: calc(var(--spacing-unit) * 0.625) calc(var(--spacing-unit) * 1.25); /* 5px 10px */
    font-size: 0.75rem; /* text-xs */
}
@media (min-width: 768px) { 
   .nav-menu-desktop .btn-primary.btn-small {
        padding: calc(var(--spacing-unit) * 0.75) calc(var(--spacing-unit) * 1.5); /* 6px 12px */
        font-size: 0.8rem; 
   }
}

.btn-large { 
    font-size: 1.05em; 
    padding: calc(var(--spacing-unit) * 1.375) calc(var(--spacing-unit) * 3.25); /* 11px 26px */
}

.btn-submit { 
    width: 100%;
    padding: calc(var(--spacing-unit) * 1.375); /* 11px */
    font-size: 1rem; 
}

.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden; 
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../assets/hero-bg.jpg') no-repeat center center/cover; 
    background-attachment: fixed; 
    opacity: 0.28; /* Slightly less opaque */
    z-index: -1; 
}

.hero-content h1 {
    font-family: var(--font-headings);
    font-size: clamp(2rem, 5vw, 4rem); 
    margin-bottom: calc(var(--spacing-unit) * 1.75);
    color: #fff;
    font-weight: 900;
    text-shadow: 0 0 9px rgba(0,0,0,0.45), 0 0 18px rgba(var(--primary-color-rgb), 0.18); 
}

.hero-content .highlight {
    color: var(--primary-color);
    text-shadow: 0 0 12px var(--primary-color), 0 0 22px var(--primary-color); 
}

.hero-content p {
    font-size: clamp(0.9rem, 2.1vw, 1.2rem); 
    margin-bottom: calc(var(--spacing-unit) * 3.5);
    max-width: 580px;
    margin-left: auto;
    margin-right: auto;
    color: var(--text-color);
}

.features-section {
    padding: calc(var(--spacing-unit) * 9) 0; /* Reduced padding */
    background-color: var(--surface-color);
}

.section-title {
    font-family: var(--font-headings);
    font-size: clamp(1.7rem, 4vw, 2.6rem); 
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 1.25);
    color: var(--primary-color);
}

.section-subtitle {
    text-align: center;
    font-size: 1rem; 
    color: var(--text-color-darker); 
    margin-bottom: calc(var(--spacing-unit) * 5); /* Reduced margin */
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.55;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); 
    gap: calc(var(--spacing-unit) * 3); 
}

.feature-item {
    background-color: var(--bg-color); 
    padding: calc(var(--spacing-unit) * 2.75); 
    border-radius: calc(var(--spacing-unit)*0.875); /* 7px */
    text-align: center;
    border: 1px solid var(--border-color);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.feature-item:hover {
    transform: translateY(-4px); 
    box-shadow: 0 8px 18px rgba(var(--primary-color-rgb), 0.2); 
}

.feature-icon {
    font-size: calc(var(--spacing-unit) * 4.25); /* 34px */
    color: var(--primary-color);
    margin-bottom: calc(var(--spacing-unit) * 1.75);
}

.feature-item h3 {
    font-family: var(--font-headings);
    font-size: 1.4rem; 
    margin-bottom: calc(var(--spacing-unit)*0.875);
    color: var(--text-color);
}

.feature-item p {
    font-size: 0.875rem; 
    color: var(--text-color-darker);
    line-height: 1.55;
}

.early-access-section {
    padding: calc(var(--spacing-unit) * 9) 0;
}

.form-container {
    background-color: var(--surface-color);
    padding: calc(var(--spacing-unit) * 3.25) calc(var(--spacing-unit) * 4.25); 
    border-radius: calc(var(--spacing-unit)*0.875); 
    max-width: 520px; 
    margin: 0 auto;
    box-shadow: 0 4px 22px rgba(0,0,0,0.28);
}

.form-group {
    margin-bottom: calc(var(--spacing-unit) * 2); 
}

.form-group label {
    display: block;
    font-weight: 500; 
    margin-bottom: calc(var(--spacing-unit)*0.625); 
    color: var(--text-color);
    font-size: 0.9rem;
}

.form-group input[type="text"],
.form-group input[type="email"] {
    width: 100%;
    padding: calc(var(--spacing-unit) * 1.125); 
    border-radius: 4.5px; 
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 0.9rem;
    transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(var(--primary-color-rgb), 0.28); 
}

.form-group-checkbox {
    display: flex;
    align-items: center;
    margin-bottom: calc(var(--spacing-unit) * 2.25); 
    padding-left: 1.5px;
}

.form-group-checkbox input[type="checkbox"] {
    margin-right: calc(var(--spacing-unit) * 0.875); 
    width: 16px; 
    height: 16px; 
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 3px; 
    display: inline-block;
    position: relative;
    cursor: pointer;
    vertical-align: middle; 
    transition: background-color 0.15s ease, border-color 0.15s ease;
}

.form-group-checkbox input[type="checkbox"]:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.form-group-checkbox input[type="checkbox"]:checked::after {
    content: '✔'; 
    font-size: 11px; 
    color: #fff; 
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%); 
    font-weight: bold;
}
.form-group-checkbox input[type="checkbox"]:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(var(--primary-color-rgb), 0.28);
}

.form-group-checkbox label {
    margin-bottom: 0; 
    font-weight: normal; 
    color: var(--text-color-darker);
    font-size: 0.825rem; 
    cursor: pointer;
    line-height: 1.4; 
    flex-grow: 1; 
}

.form-message {
    margin-top: calc(var(--spacing-unit) * 1.75);
    padding: var(--spacing-unit); 
    border-radius: 4.5px; 
    text-align: center;
    font-size: 0.875rem;
}
.form-message.success {
    background-color: rgba(46, 204, 113, 0.12);
    color: #2ecc71;
    border: 1px solid rgba(46, 204, 113, 0.45);
}
.form-message.error {
    background-color: rgba(231, 76, 60, 0.12);
    color: #e74c3c;
    border: 1px solid rgba(231, 76, 60, 0.45);
}

.confirmation-screen {
    text-align: center;
    padding: calc(var(--spacing-unit) * 2.75) 0;
}
.confirmation-screen h3 {
    color: var(--primary-color);
    font-family: var(--font-headings);
    font-size: 1.6rem; 
    margin-bottom: calc(var(--spacing-unit)*0.875);
}
.confirmation-screen p {
    color: var(--text-color-darker);
    margin-bottom: calc(var(--spacing-unit)*0.875);
    font-size: 0.9rem;
}

.main-footer {
    text-align: center;
    padding: calc(var(--spacing-unit) * 4) 0; 
    background-color: var(--bg-color); 
    border-top: 1px solid var(--border-color);
    color: #999; 
    font-size: 0.825em; 
}

.footer-links {
    margin-bottom: calc(var(--spacing-unit) * 1.5); 
}

.footer-links a {
    color: var(--text-color-darker);
    opacity: 0.75;
    text-decoration: none;
    margin: 0 calc(var(--spacing-unit)); 
    transition: color 0.25s ease, opacity 0.25s ease;
    font-size: 0.925em;
}

.footer-links a:hover {
    color: var(--primary-color);
    opacity: 1;
}

.footer-social-icons {
    margin-bottom: calc(var(--spacing-unit) * 1.5);
}
.footer-social-icons a {
    display: inline-block;
}

.footer-social-icons img {
    width: 24px; 
    height: 24px; 
    margin: 0 calc(var(--spacing-unit)*0.875) ; 
    opacity: 0.6; 
    transition: opacity 0.25s ease, transform 0.25s ease;
}

.footer-social-icons img:hover {
    opacity: 1;
    transform: scale(1.1); 
}

.legal-content-section {
    padding-bottom: calc(var(--spacing-unit) * 7); 
    min-height: calc(100vh - var(--header-height-mobile) - var(--footer-height)); 
    display: flex; 
    flex-direction: column;
    align-items: center; 
    justify-content: flex-start; 
}

.legal-content-section .container {
    background-color: var(--surface-color);
    padding: calc(var(--spacing-unit) * 4) calc(var(--spacing-unit) * 5); 
    border-radius: calc(var(--spacing-unit)*0.875); 
    box-shadow: 0 4px 22px rgba(0,0,0,0.28);
    width: 100%; 
    max-width: 820px; 
    margin-top: calc(var(--spacing-unit) * 3.5); 
    margin-bottom: calc(var(--spacing-unit) * 3.5); 
}

.legal-content-section h1 {
    font-family: var(--font-headings);
    font-size: clamp(1.8rem, 3.8vw, 2.4rem); 
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 4); 
    color: var(--primary-color);
}

.legal-content-section h2 {
    font-family: var(--font-headings);
    font-size: 1.55rem; 
    margin-top: calc(var(--spacing-unit) * 3.25); 
    margin-bottom: calc(var(--spacing-unit) * 1.5); 
    color: var(--secondary-color); 
    border-bottom: 1px solid var(--border-color); 
    padding-bottom: calc(var(--spacing-unit) * 0.625); 
}

.legal-content-section p,
.legal-content-section li {
    margin-bottom: calc(var(--spacing-unit) * 1.5); 
    line-height: 1.75; 
    color: var(--text-color-darker);
    font-size: 0.925rem; 
}
.legal-content-section ul, .legal-content-section ol {
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    padding-left: calc(var(--spacing-unit) * 3); 
}

.legal-content-section a:not(.btn) { 
    color: var(--primary-color);
    text-decoration: underline;
    font-weight: 500; 
    text-decoration-thickness: 1px;
    text-underline-offset: 2.5px;
}

.legal-content-section a:not(.btn):hover {
    color: var(--secondary-color);
    text-decoration: none;
}

.animate-on-scroll {
    opacity: 0;
    transition: opacity 0.65s ease-out, transform 0.65s ease-out; 
}

.animate-on-scroll.fade-in {
    opacity: 0;
    transform: translateY(12px); 
}

.animate-on-scroll.fade-in-up {
    opacity: 0;
    transform: translateY(35px); 
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.08s; } 
.delay-2 { transition-delay: 0.16s; }
.delay-3 { transition-delay: 0.24s; }

@media (max-width: 767px) { 
    .nav-menu-desktop {
        display: none; 
    }
    .hero-content h1 {
        font-size: clamp(1.8rem, 6.5vw, 2.4rem); 
    }
    .hero-content p {
        font-size: clamp(0.875rem, 3.3vw, 1rem); 
    }
    .features-grid {
        grid-template-columns: 1fr; 
    }
    .legal-content-section .container {
        padding: calc(var(--spacing-unit) * 2.75) calc(var(--spacing-unit) * 2.25); 
        margin-top: calc(var(--spacing-unit) * 2.25);
        margin-bottom: calc(var(--spacing-unit) * 2.25);
    }
    .legal-content-section h1 {
        font-size: clamp(1.6rem, 5vw, 1.9rem);
    }
    .legal-content-section h2 {
        font-size: 1.4rem;
    }
    .legal-content-section p, .legal-content-section li {
        font-size: 0.875rem;
    }
}

@media (min-width: 768px) { 
    .legal-content-section {
         min-height: calc(100vh - var(--header-height-desktop) - var(--footer-height));
    }
}