/* --- Reset & Base Styles --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent-color: #38bdf8;
    --accent-hover: #0ea5e9;
    --border-color: #334155;
    --font-stack: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

body {
    font-family: var(--font-stack);
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow-x: hidden;
    line-height: 1.6;
}

/* --- Subtle Background Radial Glow --- */
.background-glow {
    position: absolute;
    top: -10%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(56, 189, 248, 0.15) 0%, rgba(15, 23, 42, 0) 70%);
    z-index: 1;
    pointer-events: none;
}

/* --- Layout Container --- */
.page-container {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 640px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    justify-content: space-between;
    align-items: center;
    text-align: center;
}

/* --- Header / Logo --- */
.brand-header {
    padding-top: 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

.logo i {
    color: var(--accent-color);
}

.accent {
    color: var(--accent-color);
}

/* --- Main Content --- */
.content-container {
    margin: 4rem 0;
    width: 100%;
}

.badge {
    display: inline-block;
    background-color: rgba(56, 189, 248, 0.1);
    color: var(--accent-color);
    border: 1px solid rgba(56, 189, 248, 0.2);
    padding: 0.35rem 1rem;
    border-radius: 9999px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.hero-section h1 {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.03em;
    margin-bottom: 1.25rem;
    background: linear-gradient(to right, #ffffff, #cbd5e1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-section p {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 520px;
    margin: 0 auto 2.5rem auto;
}

/* --- Form Styles --- */
.notify-section {
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
}

.notify-form {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    background-color: var(--card-bg);
    padding: 0.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.notify-form input[type="email"] {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-main);
    padding: 0.75rem 1rem;
    font-size: 1rem;
    width: 100%;
    border-radius: 8px;
}

.notify-form input[type="email"]::placeholder {
    color: #64748b;
}

.btn-submit {
    background-color: var(--accent-color);
    color: #0f172a;
    border: none;
    outline: none;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

.btn-submit:hover {
    background-color: var(--accent-hover);
}

.btn-submit:active {
    transform: scale(0.98);
}

.form-hint {
    font-size: 0.85rem;
    color: #64748b;
    margin-top: 0.75rem;
}

/* --- Accessibility --- */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* --- Footer --- */
.page-footer {
    padding-bottom: 2rem;
    width: 100%;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.social-links a {
    color: var(--text-muted);
    font-size: 1.25rem;
    transition: color 0.2s ease;
}

.social-links a:hover {
    color: var(--accent-color);
}

.copyright {
    font-size: 0.85rem;
    color: #64748b;
}

/* --- Responsive Adjustments (Desktop inline form) --- */
@media (min-width: 480px) {
    .notify-form {
        flex-direction: row;
        align-items: center;
    }
    
    .notify-form input[type="email"] {
        flex-grow: 1;
    }
    
    .btn-submit {
        flex-shrink: 0;
    }
    
    .hero-section h1 {
        font-size: 3rem;
    }
}