/* --- Base & Variables --- */
:root {
    --primary-color: #0052cc; /* Example Blue - Adjust to your brand */
    --secondary-color: #f4f5f7; /* Light grey background */
    --text-color: #333;
    --heading-color: #172b4d; /* Darker blue/grey for headings */
    --white-color: #fff;
    --border-color: #ddd;
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; /* Clean, modern font stack */
    --heading-font: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

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

html {
    scroll-behavior: smooth; /* Smooth scrolling for anchor links */
}

body {
    font-family: var(--font-family);
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--white-color);
}

/* --- Layout & Container --- */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- Header & Footer --- */
.site-header {
    background-color: var(--white-color);
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

.logo-placeholder { /* Style this or replace with .logo if using an image */
    font-weight: bold;
    font-size: 1.5em;
    color: var(--heading-color);
}

.site-footer {
    background-color: var(--heading-color);
    color: var(--white-color);
    text-align: center;
    padding: 20px 0;
    margin-top: 40px; /* Space above footer */
    font-size: 0.9em;
}

.site-footer a {
    color: var(--secondary-color);
    text-decoration: none;
}
.site-footer a:hover {
    text-decoration: underline;
}


/* --- Typography --- */
h1, h2, h3 {
    font-family: var(--heading-font);
    color: var(--heading-color);
    margin-bottom: 0.8em;
    line-height: 1.3;
}

h1 {
    font-size: 2.8em; /* Large hero headline */
}

h2 {
    font-size: 2em;
}

h3 {
    font-size: 1.4em;
    margin-top: 1.5em; /* Space above H3s within sections */
}

p {
    margin-bottom: 1em;
}

a {
    color: var(--primary-color);
}

ul {
    list-style: none; /* Remove default bullets */
    padding-left: 0;
    margin-bottom: 1em;
}

li {
   margin-bottom: 0.5em;
   position: relative; /* For potential icon positioning */
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 12px 25px;
    border: none;
    border-radius: 5px;
    text-decoration: none;
    font-size: 1em;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white-color);
}

.btn-primary:hover {
    background-color: #003b94; /* Darker shade on hover */
    transform: translateY(-2px);
}

.btn-large {
    font-size: 1.2em;
    padding: 15px 35px;
}


/* --- Sections --- */
.content-section {
    padding: 60px 0;
}

.bg-light {
    background-color: var(--secondary-color);
}

/* --- Hero Section --- */
.hero-section {
    /* Optional: Add a background image or gradient */
    /* background: linear-gradient(rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.1)), url('hero-background.jpg') no-repeat center center/cover; */
    background-color: #e9f2ff; /* Light blueish background example */
    color: var(--heading-color); /* Adjust text color if using dark bg */
    padding: 80px 0;
    text-align: center;
}

.hero-section h1 {
    color: var(--heading-color); /* Ensure heading color is set */
}

.hero-section .subtitle {
    font-size: 1.2em;
    max-width: 700px;
    margin: 0 auto 30px auto;
    color: #4a5568; /* Slightly softer text color */
}

.hero-section .event-details-summary {
    margin-top: 20px;
    font-size: 0.9em;
    opacity: 0.8;
}

/* --- Problem Section List --- */
#problem ul {
    list-style: disc; /* Use standard bullets here */
    padding-left: 25px;
}
#problem li {
     margin-bottom: 0.8em;
}


/* --- Seminar Takeaways List --- */
.takeaways-list li {
    padding-left: 35px; /* Space for icon */
    margin-bottom: 1em;
}

.takeaways-list .icon {
    position: absolute;
    left: 0;
    top: 2px; /* Adjust vertical alignment */
    font-size: 1.2em;
    color: var(--primary-color);
}

/* --- Event Details Grid --- */
.details-grid {
    display: grid;
    grid-template-columns: auto 1fr; /* Label column, Value column */
    gap: 10px 20px; /* Row gap, Column gap */
    max-width: 600px;
}

.details-grid div:nth-child(odd) { /* Style labels */
    font-weight: bold;
    color: var(--heading-color);
}

/* --- Audience List --- */
.audience-list {
    columns: 2; /* Create two columns for the list on wider screens */
    -webkit-columns: 2;
    -moz-columns: 2;
    gap: 20px;
}

.audience-list li {
    margin-bottom: 0.8em;
    /* Optional: Add a checkmark or icon */
    padding-left: 20px;
}
.audience-list li::before {
    content: '✓'; /* Simple checkmark example */
    color: var(--primary-color);
    position: absolute;
    left: 0;
    font-weight: bold;
}


/* --- Registration Form --- */
.registration-section {
    background-color: var(--primary-color);
    color: var(--white-color);
    padding: 60px 0;
}

.registration-section h2, .registration-section p {
    color: var(--white-color);
    text-align: center;
}
.registration-section p {
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.registration-form {
    max-width: 600px;
    margin: 30px auto 0 auto;
    background-color: var(--white-color);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: var(--heading-color);
}

.form-group input[type="text"],
.form-group input[type="email"] {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1em;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 82, 204, 0.2); /* Focus ring */
}

.registration-form .btn {
    width: 100%;
    margin-top: 10px;
}

.privacy-note {
    font-size: 0.85em;
    text-align: center;
    margin-top: 20px;
    color: #666; /* Grey text */
}
.privacy-note a {
   color: var(--primary-color);
}

/* --- Host Section --- */
.host-profile {
    display: flex;
    align-items: center;
    gap: 20px;
}

.host-photo {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
}


/* --- Responsiveness --- */
@media (max-width: 768px) {
    h1 { font-size: 2.2em; }
    h2 { font-size: 1.8em; }

    .hero-section { padding: 60px 0; }
    .content-section { padding: 40px 0; }

    .audience-list { columns: 1; } /* Stack audience list */

    .details-grid { grid-template-columns: 1fr; gap: 5px 0;} /* Stack details grid */
    .details-grid div:nth-child(odd) { margin-bottom: -5px; } /* Reduce space after label */
}

@media (max-width: 480px) {
    h1 { font-size: 1.8em; }
    h2 { font-size: 1.5em; }
    .btn { width: 100%; padding: 15px; } /* Make buttons full width */
    .btn-large { font-size: 1.1em; }
    .registration-form { padding: 20px; }
    .host-profile { flex-direction: column; text-align: center; }
}