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

:root {
    --bg-color: #030305;
    --bg-secondary: #0a0a0f;
    --text-main: #eafcff;
    --text-muted: #8ab4c4;
    --text-dim: #5a7a8a;
    
    --accent-primary: #00d9ff;
    --accent-secondary: #0072ff;
    --accent-tertiary: #00ffaa;
    --accent-glow: rgba(0, 217, 255, 0.4);
    --accent-glow-strong: rgba(0, 217, 255, 0.6);
    
    --border-color: #1a3a4a;
    --border-light: rgba(0, 217, 255, 0.15);
    --grid-color: rgba(0, 217, 255, 0.03);
    
    --card-bg: rgba(0, 114, 255, 0.04);
    --card-bg-alt: rgba(0, 217, 255, 0.03);
    --card-hover: rgba(0, 217, 255, 0.08);
    --card-border: rgba(0, 217, 255, 0.15);
    --card-border-hover: rgba(0, 217, 255, 0.4);
    
    --glass-bg: rgba(5, 10, 15, 0.6);
    --glass-border: rgba(0, 217, 255, 0.1);
    --glass-blur: 20px;
    
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(0, 217, 255, 0.2);
    --shadow-glow-strong: 0 0 50px rgba(0, 217, 255, 0.35);
    
    --font-heading: 'Quicksand', sans-serif;
    --font-body: 'Quicksand', sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 5rem;
    
    --radius-sm: 8px;    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.4s cubic-bezier(0.19, 1, 0.22, 1);
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    font-family: var(--font-body);
    background-image: 
        linear-gradient(var(--grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 50px 50px;
    position: relative;
    line-height: 1.7;
}

body::after {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse at 50% 0%, rgba(0, 114, 255, 0.12) 0%, transparent 60%),
        radial-gradient(ellipse at 100% 50%, rgba(0, 217, 255, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 0% 100%, rgba(0, 217, 255, 0.08) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

body::before {
    content: "";
    position: fixed;
    top: -50%;    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(0, 217, 255, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0, 114, 255, 0.06) 0%, transparent 50%);
    animation: pulse 10s ease-in-out infinite;
    pointer-events: none;
    z-index: 0;
}

::selection {
    background: var(--accent-primary);
    color: var(--bg-color);
}

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--accent-primary), var(--accent-secondary));
    border-radius: var(--radius-full);
    border: 2px solid var(--bg-color);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--accent-tertiary), var(--accent-primary));
}

.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    transition: opacity var(--transition-slow);
}

.spinner {
    width: 60px;    height: 60px;
    border: 3px solid rgba(0, 217, 255, 0.1);
    border-top-color: var(--accent-primary);
    border-right-color: var(--accent-secondary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    box-shadow: 
        0 0 20px var(--accent-glow),
        0 0 40px var(--accent-glow);
    position: relative;
}

.spinner::before {
    content: '';
    position: absolute;
    top: 5px;
    left: 5px;
    right: 5px;
    bottom: 5px;
    border: 3px solid transparent;
    border-top-color: var(--accent-tertiary);
    border-radius: 50%;
    animation: spin 2s linear infinite reverse;
}

main.container,
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-lg);
    position: relative;
    z-index: 10;
    opacity: 0;
    animation: fadeIn var(--transition-slow) forwards 0.3s;
}

header {
    text-align: center;
    padding: var(--spacing-xl) 0 var(--spacing-2xl);
}

.logo {
    height: 150px;
    width: auto;
    margin-bottom: var(--spacing-lg);
    filter: drop-shadow(0 0 25px rgba(0, 217, 255, 0.4));
    transition: filter var(--transition-base), transform var(--transition-base);
}

.logo:hover {    filter: drop-shadow(0 0 40px rgba(0, 217, 255, 0.6)) drop-shadow(0 0 80px rgba(0, 114, 255, 0.4));
    transform: scale(1.08) rotate(-2deg);
}

h1 {
    font-family: var(--font-heading);
    font-size: 5rem;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: -3px;
    line-height: 1;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 50%, var(--accent-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 60px rgba(0, 217, 255, 0.4);
    animation: shimmer 4s ease-in-out infinite, glow 3s ease-in-out infinite alternate;
    background-size: 200% auto;
    position: relative;
}

h1::after {
    content: 'FINS';
    position: absolute;
    top: 0;
    left: 0;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: blur(20px);
    opacity: 0.5;
    z-index: -1;
}

.subtitle {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xl);
    font-weight: 400;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.9;
}

.subtitle strong {
    color: var(--accent-primary);
    font-weight: 700;
    text-shadow: 0 0 20px rgba(0, 217, 255, 0.3);}

.last-updated {
    color: var(--text-dim);
    font-size: 0.85rem;
    font-style: italic;
    margin-top: var(--spacing-sm);
    display: block;
    text-align: center;
    opacity: 0.8;
}

.cta-container {
    margin-bottom: var(--spacing-2xl);
}

.invite-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #fff;
    text-decoration: none;
    padding: 1.3rem 3.5rem;
    border-radius: var(--radius-full);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.15rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    transition: all var(--transition-bounce);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 
        0 4px 20px var(--accent-glow),
        0 0 40px rgba(0, 217, 255, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.invite-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.6s ease;
}
.invite-btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.invite-btn:hover::before {
    left: 100%;
}

.invite-btn:hover::after {
    opacity: 1;
}

.invite-btn img {
    height: 24px;
    width: auto;
    margin-right: 12px;
    display: block;
    filter: brightness(1);
    transition: filter var(--transition-base), transform var(--transition-base);
}

.invite-btn:hover img {
    transform: rotate(-12deg) scale(1.15);
    filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.5));
}

.invite-btn:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 
        0 8px 35px var(--accent-glow-strong),
        0 0 60px rgba(0, 217, 255, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.4);
}

.invite-btn:active {
    transform: translateY(-2px) scale(0.98);
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);}

.feature-card {
    background: linear-gradient(135deg, var(--card-bg), var(--card-bg-alt));
    padding: var(--spacing-lg);
    border: 1px solid var(--card-border);
    transition: all var(--transition-bounce);
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    opacity: 0;
    backdrop-filter: blur(10px);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary), var(--accent-tertiary));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.feature-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(0, 217, 255, 0.1), transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-card:hover::after {
    opacity: 1;
}

.feature-card:hover {
    border-color: var(--card-border-hover);
    background: linear-gradient(135deg, var(--card-hover), rgba(0, 217, 255, 0.06));
    transform: translateY(-10px);
    box-shadow: 
        0 15px 50px rgba(0, 217, 255, 0.15),        0 0 30px rgba(0, 217, 255, 0.1);
}

.feature-card h3 {
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-heading);
    font-size: 1.35rem;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 10px;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.75;
}

.content-card {
    background: linear-gradient(135deg, var(--card-bg), var(--card-bg-alt));
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    backdrop-filter: blur(var(--glass-blur));
    box-shadow: 
        var(--shadow-lg),
        0 0 40px rgba(0, 217, 255, 0.05);
    margin-bottom: var(--spacing-2xl);
    position: relative;
    overflow: hidden;
}

.content-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
    opacity: 0.5;
}

h2 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    margin: var(--spacing-xl) 0 var(--spacing-md);
    color: var(--accent-primary);
    padding-bottom: var(--spacing-xs);    border-bottom: 2px solid rgba(0, 217, 255, 0.15);
    display: flex;
    align-items: center;
    gap: 12px;
    text-shadow: 0 0 20px rgba(0, 217, 255, 0.3);
}

h2:first-of-type {
    margin-top: 0;
}

h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin: var(--spacing-lg) 0 var(--spacing-sm);
    color: var(--text-main);
}

p {
    margin-bottom: var(--spacing-sm);
    line-height: 1.85;
    color: var(--text-muted);
}

ul {
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    color: var(--text-muted);
}

li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.75;
    position: relative;
}

li::marker {
    color: var(--accent-primary);
}

strong {
    color: var(--accent-primary);
    font-weight: 700;
    text-shadow: 0 0 15px rgba(0, 217, 255, 0.2);
}

footer {
    text-align: center;
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--border-color);    margin-top: var(--spacing-2xl);
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    align-items: center;
    opacity: 0;
    animation: fadeIn var(--transition-slow) forwards 0.6s;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
    opacity: 0.5;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    justify-content: center;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-base), transform var(--transition-base);
    position: relative;
    padding: var(--spacing-xs) var(--spacing-xs);
}

.footer-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transition: width var(--transition-base);
    border-radius: var(--radius-full);}

.footer-links a:hover {
    color: var(--accent-primary);
    transform: translateY(-2px);
}

.footer-links a:hover::after {
    width: 80%;
}

.bubble {
    position: fixed;
    background: radial-gradient(circle at 30% 30%, rgba(0, 217, 255, 0.5), rgba(0, 217, 255, 0.1) 70%);
    border-radius: 50%;
    animation: rise 4s ease-in infinite;
    pointer-events: none;
    z-index: 1;
    box-shadow: 
        0 0 15px rgba(0, 217, 255, 0.4),
        inset 0 0 20px rgba(255, 255, 255, 0.2);
    opacity: 0;
}

.error-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 80vh;
    text-align: center;
}

.error-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

.error-code {
    font-size: 12rem;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -8px;
    background: linear-gradient(180deg, var(--accent-primary) 0%, var(--accent-secondary) 50%, var(--accent-primary) 100%);
    -webkit-background-clip: text;    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: float 6s ease-in-out infinite, shimmer 4s ease-in-out infinite;
    background-size: 200% auto;
    filter: drop-shadow(0 0 40px rgba(0, 217, 255, 0.4));
}

.error-content .fish-animation {
    font-size: 4.5rem;
    margin: var(--spacing-sm) 0 var(--spacing-lg);
    filter: drop-shadow(0 0 15px rgba(0, 217, 255, 0.6));
    animation: swim 15s linear infinite, float 3s ease-in-out infinite;
    display: inline-block;
}

.error-content h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    border: none;
    justify-content: center;
}

.error-content .subtitle {
    margin-bottom: var(--spacing-lg);
}

.error-page footer {
    margin-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing-lg);
    width: 100%;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {        transform: translateY(-20px);
    }
}

@keyframes swim {
    0% {
        transform: translateX(-100%) rotateY(180deg);
    }
    100% {
        transform: translateX(100vw) rotateY(180deg);
    }
}

@keyframes shimmer {
    0% {
        background-position: 0% center;
    }
    50% {
        background-position: 100% center;
    }
    100% {
        background-position: 0% center;
    }
}

@keyframes glow {
    0% {
        text-shadow: 0 0 40px rgba(0, 217, 255, 0.3);
    }
    100% {
        text-shadow: 0 0 80px rgba(0, 217, 255, 0.6), 0 0 120px rgba(0, 114, 255, 0.4);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.4;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.08);
    }
}

@keyframes rise {
    0% {
        transform: translateY(100vh) scale(0);
        opacity: 0;
    }    20% {
        opacity: 1;
    }
    100% {
        transform: translateY(-150px) scale(1.2);
        opacity: 0;
    }
}

@media (max-width: 1024px) {
    .container {
        max-width: 900px;
    }
    
    h1 {
        font-size: 4rem;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-2xl: 3rem;
        --spacing-xl: 2rem;
    }
    
    h1 {
        font-size: 3rem;
        letter-spacing: -1px;
    }
    
    .logo {
        height: 110px;
    }
    
    .invite-btn {
        width: 100%;
        justify-content: center;
        padding: 1.1rem 2.5rem;
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .container {
        padding: var(--spacing-xl) var(--spacing-sm);
    }
    
    .content-card {        padding: var(--spacing-lg);
    }
    
    .error-code {
        font-size: 7rem;
    }
    
    .error-content .fish-animation {
        font-size: 3rem;
    }
    
    h2 {
        font-size: 1.4rem;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .subtitle {
        font-size: 1rem;
        padding: 0 var(--spacing-sm);
    }
    
    .feature-card {
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2.5rem;
    }
    
    .invite-btn {
        padding: 1rem 2rem;
        font-size: 1rem;
        letter-spacing: 1px;
    }
    
    .feature-card {
        padding: var(--spacing-md);
    }
    
    .error-code {
        font-size: 5rem;
        letter-spacing: -4px;
    }
    
    .logo {        height: 90px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

@media (prefers-contrast: high) {
    :root {
        --card-border: rgba(0, 217, 255, 0.4);
        --text-muted: #a8d5e5;
    }
}

.text-gradient {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glow-text {
    text-shadow: 0 0 20px rgba(0, 217, 255, 0.4);
}

.glow-box {
    box-shadow: 0 0 30px rgba(0, 217, 255, 0.2);
}

@media print {
    body {
        background: #fff;
        color: #000;
    }
        .loader,
    .bubble,
    body::before,
    body::after {
        display: none !important;
    }
    
    .invite-btn {
        display: none;
    }
}