@import url(https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Nunito:wght@600;700;800&display=swap);
/* Reset and base styles */
/* Optional modern, professional + playful font pairing */

:root {
    --color-bg: #0f1221;
    --color-surface: #101429;
    --color-panel: #141a33;
    --color-muted: #aab1c6;
    --color-text: #e7ecff;
    --color-heading: #ffffff;
    --color-primary: #6ea8ff; /* playful blue */
    --color-primary-strong: #4c86f7;
    --color-accent: #c86bfa;  /* lilac accent */
    --color-accent-2: #66e0d2; /* teal accent */
    --shadow-1: 0 6px 24px rgba(0,0,0,0.25);
    --radius-1: 10px;
    --radius-2: 14px;
    --radius-pill: 999px;
    --glass: rgba(255,255,255,0.06);
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-heading);
    letter-spacing: 0.2px;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

p {
    margin-bottom: 1rem;
    color: var(--color-muted);
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-accent); }
a:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 2px; border-radius: 4px; }

/* Navigation */
.site-header {
    background: rgba(16, 20, 41, 0.6);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar {
    padding: 1rem 0;
}

.navbar-brand h1 {
    font-family: 'Nunito', system-ui, sans-serif;
    font-weight: 800;
    letter-spacing: 0.4px;
    font-size: 1.6rem;
    margin: 0;
    color: var(--color-heading);
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    padding-left: 8px;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.navbar-brand a {
    color: inherit !important;
    text-decoration: none !important;
}

img.brand-mark:hover {
    transform: rotate(360deg);
}

.brand-mark {
    display: inline-block;
    vertical-align: middle;
    filter: drop-shadow(0 2px 6px rgba(0,0,0,0.25));
}

img.brand-mark {
    animation: spin 8s linear infinite;
    animation-play-state: paused;
    transform-origin: 50% 50%;
    will-change: transform;
}

img.brand-mark:hover {
    animation-play-state: running;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
    img.brand-mark { animation: none; }
}

.navbar-nav {
    list-style: none;
    display: flex;
    gap: 2rem;
    align-items: center;
}

.navbar-nav a {
    text-decoration: none;
    color: var(--color-muted);
    font-weight: 500;
    padding: 0.35rem 0.6rem;
    border-radius: 6px;
    transition: all 0.25s ease;

}

.navbar-nav a:hover { color: var(--color-text); background: rgba(255,255,255,0.06); }
.navbar-nav a:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 2px; }

/* Active nav mirrors hover state */
.navbar-nav a.is-active {
    color: var(--color-text);
    background: rgba(255,255,255,0.06);
}

/* Hero Section */
.hero {
    background: radial-gradient(1200px 600px at 20% -10%, rgba(110,168,255,0.35), transparent 60%),
                radial-gradient(1000px 500px at 90% 10%, rgba(200,107,250,0.25), transparent 60%),
                linear-gradient(180deg, #0f1221 0%, #101429 100%);
    color: white;
    padding: 5rem 0 4rem;
    text-align: center;
}

/* Definition Header */
.definition-header {
    max-width: 880px;
    margin: 0 auto 3rem auto;
    text-align: left;
    background: var(--glass);
    padding: 2rem;
    border-radius: var(--radius-2);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-1);
    border: 1px solid rgba(255,255,255,0.08);
    animation: fadeUp 700ms ease-out both;
}

.definition-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 0.25rem;
    color: white;
    text-align: center;
    letter-spacing: 0.6px;
}

.definition-pronunciation {
    font-size: 1.2rem;
    color: #bdc3c7;
    text-align: center;
    margin-bottom: 0.5rem;
    font-style: italic;
}

.definition-type {
    font-size: 1rem;
    color: #95a5a6;
    text-align: center;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.definition-meaning {
    font-size: 1.3rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    color: white;
    text-align: center;
}

.definition-example {
    font-size: 1rem;
    color: #bdc3c7;
    font-style: italic;
    text-align: center;
    border-left: 3px solid var(--color-primary);
    padding-left: 1rem;
    margin-left: 2rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 1.4rem;
    text-decoration: none;
    border-radius: var(--radius-pill);
    font-weight: 600;
    transition: all 0.25s ease;
    border: none;
    cursor: pointer;
    box-shadow: 0 8px 20px rgba(78, 114, 225, 0.25);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary-strong), var(--color-accent));
    color: white;
}

.btn-primary:hover {
    background: #2980b9;
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid rgba(255,255,255,0.7);
}

.btn-secondary:hover {
    background: white;
    color: #3498db;
}

/* Features Section */
.features {
    padding: 4rem 0;
    background: linear-gradient(180deg, var(--color-surface), var(--color-panel));
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--color-heading);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: rgba(255,255,255,0.04);
    padding: 2rem;
    border-radius: var(--radius-1);
    border: 1px solid rgba(255,255,255,0.06);
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 0 0 0 rgba(0,0,0,0);
}

.feature-card:hover {
    transform: translateY(-6px);
    border-color: rgba(255,255,255,0.15);
    box-shadow: var(--shadow-1);
}

.feature-card h3 {
    color: var(--color-heading);
    margin-bottom: 0.75rem;
}

/* CTA Section */
.cta {
    background: linear-gradient(135deg, var(--color-accent), var(--color-primary-strong));
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.cta h2 {
    color: white;
    margin-bottom: 1rem;
}

.cta p {
    color: #bdc3c7;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Footer */
.site-footer {
    background: #0c0f1b;
    color: #97a0ba;
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.06);
}

/* Responsive Design */
@media (max-width: 768px) {
    .navbar-nav {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* Whitepaper Styles */
.whitepaper {
    padding: 2rem 0 4rem;
    background: #0f1221; /* match dark site bg for consistency */
}

.paper-header {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid #e0e0e0;
}

.paper-meta {
    margin-top: 1rem;
    color: #666;
}

.paper-meta p {
    margin-bottom: 0.5rem;
}

.paper-section {
    margin-bottom: 3rem;
}

.paper-section h2 {
    color: var(--color-heading);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

.paper-section h3 {
    color: #cfd7ff;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.paper-section ul, .paper-section ol {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.paper-section li {
    margin-bottom: 0.5rem;
}

/* Whitepaper content typography */
.whitepaper .container {
    max-width: 900px;
}
.whitepaper h1, .whitepaper h2, .whitepaper h3, .whitepaper h4 { color: var(--color-heading); }
.whitepaper p, .whitepaper li { color: #d7ddff; }
.whitepaper strong { color: #ffffff; }
.whitepaper code, .whitepaper pre { background: rgba(255,255,255,0.06); color: #e7ecff; }
.whitepaper a { color: var(--color-primary); }
.whitepaper a:hover { color: var(--color-accent); }

/* Indented lists within whitepaper content */
.whitepaper ul,
.whitepaper ol {
    margin-left: 1rem;
    padding-left: .75rem;
    list-style-position: outside;
}

.whitepaper li {
    margin-bottom: 0.5rem;
}

/* Waitlist Styles */
.waitlist-hero {
    background: linear-gradient(135deg, var(--color-primary-strong) 0%, var(--color-accent) 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.waitlist-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
    color: #ffe8e8;
}

.waitlist-form {
    padding: 4rem 0;
    background: #ffffff;
}

.form-container {
    max-width: 640px;
    margin: 0 auto;
    padding: 2rem 2.25rem;
    background: #ffffff;
    border: 1px solid #e6eaf2;
    border-radius: 10px;
    box-shadow: 0 8px 28px rgba(0,0,0,0.08);
}

.form-container h2 {
    text-align: center;
    margin-bottom: 1rem;
    color: #0f172a;
    letter-spacing: 0.2px;
    font-weight: 800;
}

.form-container p {
    text-align: center;
    margin-bottom: 2rem;
    color: #2c3e50;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #2c3e50;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary-strong);
    box-shadow: 0 0 0 2px rgba(110, 168, 255, 0.25);
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    cursor: pointer;
    font-weight: normal;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin-right: 0.5rem;
    margin-top: 0.25rem;
}

.btn-large {
    width: 100%;
    padding: 1rem;
    font-size: 1.1rem;
}

.form-success {
    text-align: center;
    padding: 2rem;
    background: #d4edda;
    border: 1px solid #c3e6cb;
    border-radius: 4px;
    color: #155724;
}

.benefits {
    padding: 4rem 0;
    background: #f8f9fa;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.benefits h2 {
    color: #0f172a;
}

.benefits .container > h2 {
    position: relative;
    display: inline-block;
    font-weight: 800;
    letter-spacing: 0.4px;
}

.benefits .container > h2::after {
    content: "";
    display: block;
    width: 160px;
    height: 4px;
    margin-top: 10px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--color-primary-strong), var(--color-accent));
}

.benefit-card {
    background: #ffffff;
    padding: 2rem;
    border-radius: 10px;
    text-align: left;
    border: 1px solid #e6eaf2;
    box-shadow: 0 6px 24px rgba(0,0,0,0.08);
    position: relative;
}

.benefit-card h3 {
    color: #0f172a;
    margin-bottom: 0.75rem;
    padding-left: 3rem; /* expanded space for larger arrow */
    position: relative;
}

.benefit-card p {
    color: #424c5f;
}

/* Emphasis: gradient left bar and bold arrow with grey shades */
.benefit-card::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 6px;
    border-top-left-radius: 10px;
    border-bottom-left-radius: 10px;
    background: linear-gradient(180deg, #e6eaf2 0%, #cfd6e6 100%);
}

.benefit-card h3::before {
    content: "➔"; /* bold directional arrow */
    position: absolute;
    left: 0.6rem;
    top: 50%;
    transform: translateY(-52%);
    font-size: 2.2rem; /* larger arrow */
    line-height: 1;
    color: #1f2937; /* dark grey */
    text-shadow:
      1px 1px 0 #9aa5b1,
      2px 2px 0 #c7ced8,
      3px 3px 0 #e2e8f0; /* layered grey shades for depth */
      opacity: 0.8;
}

/* Utility Classes */
.text-center { text-align: center; }
.mb-2 { margin-bottom: 2rem; }
.mt-2 { margin-top: 2rem; } 

/* Micro-interactions */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(18px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero .hero-actions .btn { animation: fadeUp 700ms ease-out both; }
.hero .hero-actions .btn:nth-child(2) { animation-delay: 120ms; }

/* Accessibility */
.btn:focus-visible { outline: 3px solid var(--color-accent-2); outline-offset: 2px; }