/* style.css */

/* -------------------
   CSS Variables
-------------------- */
:root {
    --font-primary: 'Roboto', sans-serif;
    --font-headings: 'Archivo Black', sans-serif;

    /* Monochromatic Scheme with a Futuristic Accent */
    --color-background: #0a0a0c; /* Very dark, almost black - futuristic base */
    --color-background-alt: #141418; /* Slightly lighter dark shade for alternate sections */
    --color-surface: #1f1f23; /* For cards, modals, distinct surfaces */
    --color-border: #333338; /* Subtle borders */

    --color-text-primary: #e0e0e5; /* Light grey for primary text on dark backgrounds */
    --color-text-secondary: #a0a0a8; /* Muted grey for secondary text */
    --color-text-headings: #ffffff; /* Pure white for main headings */
    --color-text-dark-on-light: #222222; /* For any light background elements, ensuring contrast */

    --color-accent: #00e5ff; /* Bright, futuristic cyan/blue */
    --color-accent-hover: #00b8cc; /* Darker shade for hover */
    --color-accent-darker: #008c9e;

    --color-success: #4CAF50;
    --color-error: #F44336;

    /* Spacing */
    --spacing-xs: 0.25rem; /* 4px */
    --spacing-sm: 0.5rem;  /* 8px */
    --spacing-md: 1rem;    /* 16px */
    --spacing-lg: 1.5rem;  /* 24px */
    --spacing-xl: 2rem;    /* 32px */
    --spacing-xxl: 3rem;   /* 48px */
    --spacing-section: 4rem; /* 64px */

    /* Typography */
    --text-base-size: 1rem; /* 16px */
    --text-scale-ratio: 1.2;
    --text-sm: calc(var(--text-base-size) / var(--text-scale-ratio));
    --text-lg: calc(var(--text-base-size) * var(--text-scale-ratio));
    --text-xl: calc(var(--text-base-size) * var(--text-scale-ratio) * var(--text-scale-ratio));
    --text-xxl: calc(var(--text-base-size) * var(--text-scale-ratio) * var(--text-scale-ratio) * var(--text-scale-ratio));

    /* Borders and Shadows */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --box-shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
    --box-shadow-md: 0 4px 8px rgba(0, 0, 0, 0.3);
    --box-shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.4);
    --box-shadow-accent: 0 0 15px var(--color-accent-darker);

    /* Transitions */
    --transition-fast: 0.2s ease-in-out;
    --transition-smooth: 0.3s ease-in-out;

    /* Header Height for content offset */
    --header-height: 70px; /* Adjust if header height changes */
}

/* -------------------
   Global Resets & Base Styles
-------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 100%; /* Corresponds to 16px by default */
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-background);
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden; /* Prevent horizontal scroll */
}

.main-container {
    width: 100%;
    overflow-x: hidden;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

/* -------------------
   Typography
-------------------- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-headings);
    color: var(--color-text-headings);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    text-shadow: 1px 1px 3px rgba(0,0,0,0.5); /* Ensure contrast for headings */
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem); /* Adaptive typography */
}

h2 {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
}

h3 {
    font-size: clamp(1.4rem, 3vw, 2rem);
    color: var(--color-accent); /* Accent for H3 in cards */
}

h4 {
    font-size: clamp(1.2rem, 2.5vw, 1.6rem);
}

p {
    font-size: var(--text-base-size);
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover, a:focus {
    color: var(--color-accent-hover);
    text-decoration: underline;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* -------------------
   Buttons - Global
-------------------- */
.btn, button, input[type="submit"], input[type="button"] {
    display: inline-block;
    font-family: var(--font-headings);
    font-size: var(--text-base-size);
    font-weight: bold;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    border: 2px solid transparent;
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    transition: background-color var(--transition-smooth), color var(--transition-smooth), border-color var(--transition-smooth), transform var(--transition-fast);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-primary,
button[type="submit"] { /* Apply primary styling to submit buttons by default */
    background-color: var(--color-accent);
    color: var(--color-background); /* High contrast text on accent button */
    border-color: var(--color-accent);
}

.btn-primary:hover, .btn-primary:focus,
button[type="submit"]:hover, button[type="submit"]:focus {
    background-color: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    color: var(--color-background);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 229, 255, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.btn-secondary:hover, .btn-secondary:focus {
    background-color: var(--color-accent);
    color: var(--color-background);
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

/* -------------------
   Header & Navigation
-------------------- */
.site-header {
    background-color: rgba(10, 10, 12, 0.85); /* Semi-transparent dark background */
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: var(--spacing-sm) 0;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: var(--box-shadow-sm);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-headings);
    font-size: clamp(1.5rem, 3vw, 1.8rem);
    color: var(--color-text-headings) !important; /* Override general link color */
    text-decoration: none !important;
}
.logo:hover {
    color: var(--color-accent) !important;
}

.main-nav .nav-menu {
    list-style: none;
    display: flex;
    gap: var(--spacing-lg);
}

.main-nav .nav-menu li a {
    font-family: var(--font-primary);
    font-weight: bold;
    color: var(--color-text-primary);
    text-decoration: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    transition: color var(--transition-smooth), background-color var(--transition-smooth);
}

.main-nav .nav-menu li a:hover,
.main-nav .nav-menu li a:focus,
.main-nav .nav-menu li a.active { /* Add .active class with JS for current page */
    color: var(--color-accent);
    background-color: rgba(0, 229, 255, 0.1);
}

.nav-toggle {
    display: none; /* Hidden by default, shown on mobile */
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.nav-toggle .hamburger {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--color-text-headings);
    position: relative;
    transition: transform var(--transition-smooth);
}

.nav-toggle .hamburger::before,
.nav-toggle .hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--color-text-headings);
    transition: transform var(--transition-smooth), top var(--transition-smooth), bottom var(--transition-smooth);
}

.nav-toggle .hamburger::before {
    top: -8px;
}

.nav-toggle .hamburger::after {
    bottom: -8px;
}

/* Burger menu open state (toggled by JS) */
.main-nav.nav-open .nav-toggle .hamburger {
    transform: rotate(45deg);
}
.main-nav.nav-open .nav-toggle .hamburger::before {
    top: 0;
    transform: rotate(90deg);
}
.main-nav.nav-open .nav-toggle .hamburger::after {
    bottom: 0;
    transform: rotate(90deg);
    opacity: 0; /* Hide bottom bar for a cleaner X */
}


/* -------------------
   Hero Section
-------------------- */
.hero-section {
    min-height: calc(100vh - var(--header-height));
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-section) 0;
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed; /* Parallax effect */
    position: relative; /* For pseudo-element overlay if needed */
}

.hero-section::before { /* Optional: Another layer for gradient if HTML style is just image */
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    /* background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.7)); /* Already in HTML, but good for fallback */
    z-index: 1;
}

.hero-content {
    position: relative; /* To be above the ::before pseudo-element */
    z-index: 2;
    max-width: 800px;
}

.hero-content h1 {
    color: var(--color-text-headings) !important; /* Explicitly white as per VAs */
    margin-bottom: var(--spacing-lg);
    text-shadow: 2px 2px 8px rgba(0,0,0,0.7);
}

.hero-content p {
    color: var(--color-text-primary) !important; /* Explicitly light for readability on dark bg */
    font-size: var(--text-lg);
    margin-bottom: var(--spacing-xl);
}

/* -------------------
   General Section Styling
-------------------- */
.section-padding {
    padding-top: var(--spacing-section);
    padding-bottom: var(--spacing-section);
}

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

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--color-text-headings);
    text-transform: uppercase;
    letter-spacing: 1px;
}
.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: var(--color-accent);
    margin: var(--spacing-sm) auto 0;
    border-radius: 2px;
}

.section-intro {
    text-align: center;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: var(--spacing-xl);
    color: var(--color-text-secondary);
}

/* -------------------
   Cards (Global)
-------------------- */
.card {
    background-color: var(--color-surface);
    border-radius: var(--border-radius-md);
    box-shadow: var(--box-shadow-md);
    overflow: hidden;
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
    display: flex;
    flex-direction: column;
    /* align-items: center; /* Centering content inside the card */
    text-align: left; /* Default text align for card content */
    height: 100%; /* For consistent height in grids */
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow-lg), var(--box-shadow-accent);
}

.card-image {
    width: 100%;
    /* Fixed height for card images. Adjust as needed. */
    height: 250px; /* Example fixed height, adjust per design */
    overflow: hidden;
    display: flex; /* For centering if image is smaller, though object-fit handles it */
    align-items: center;
    justify-content: center;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover; /* Ensures image covers the area, crops if necessary */
    transition: transform var(--transition-smooth);
}

.card:hover .card-image img {
    transform: scale(1.05);
}

.card-content {
    padding: var(--spacing-lg);
    flex-grow: 1; /* Allows content to fill available space */
    display: flex;
    flex-direction: column;
}
.card-content h3 {
    margin-top: 0;
}
.card-content p {
    flex-grow: 1; /* Pushes button to bottom if card-content is flex */
    margin-bottom: var(--spacing-md);
}
.card-content .btn {
    margin-top: auto; /* Pushes button to the bottom */
    align-self: flex-start; /* Aligns button to the left */
}


/* Specific Grids for Card Sections */
.research-grid,
.webinars-grid,
.team-grid { /* Shared by instructors and team */
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

/* Instructor/Team Card Specifics */
.instructor-card .card-image,
.team-member-card .card-image {
    height: 300px; /* Slightly taller for portraits */
    border-bottom: 3px solid var(--color-accent);
}
.instructor-card .card-image img,
.team-member-card .card-image img {
    object-position: top center; /* Often better for portraits */
}

.instructor-card h4,
.team-member-card h4 {
    color: var(--color-text-secondary);
    font-size: var(--text-base-size);
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-primary);
    font-weight: bold;
}

/* -------------------
   Timeline (Events Section)
-------------------- */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::after { /* The central line */
    content: '';
    position: absolute;
    width: 4px;
    background-color: var(--color-accent);
    opacity: 0.3;
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -2px;
    z-index: -1; /* Behind items */
}

.timeline-item {
    padding: var(--spacing-md) var(--spacing-xl);
    position: relative;
    background-color: transparent; /* Items themselves are transparent, content is card */
    width: 50%;
}

.timeline-item:nth-child(odd) {
    left: 0;
    padding-right: calc(var(--spacing-xl) + 20px); /* Space for the circle */
}

.timeline-item:nth-child(even) {
    left: 50%;
    padding-left: calc(var(--spacing-xl) + 20px); /* Space for the circle */
}

/* The circle on the timeline */
.timeline-item::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    right: -10px; /* Adjust for odd/even */
    background-color: var(--color-surface);
    border: 4px solid var(--color-accent);
    top: 25px; /* Align with content better */
    border-radius: 50%;
    z-index: 1;
}

.timeline-item:nth-child(odd)::after {
    right: -10px;
}
.timeline-item:nth-child(even)::after {
    left: -10px;
}

.timeline-content { /* This is the .card within .timeline-item */
    position: relative;
    border: 1px solid var(--color-border);
}

.timeline-content .card-image {
    height: 200px; /* Smaller images for timeline events */
}

.timeline-date {
    display: inline-block;
    background-color: var(--color-accent);
    color: var(--color-background);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--text-sm);
    font-weight: bold;
    border-radius: var(--border-radius-sm);
    margin-bottom: var(--spacing-sm);
}

/* -------------------
   External Resources Section
-------------------- */
.resources-list .resource-item.card {
    margin-bottom: var(--spacing-lg); /* If they are stacked */
    /* If in a grid, the grid gap will handle it */
}
.resource-item.card .card-content {
    padding: var(--spacing-lg);
}
.resource-item h3 a {
    color: var(--color-accent);
}
.resource-item h3 a:hover {
    text-decoration: underline;
}
.resource-item p {
    color: var(--color-text-secondary);
}

/* -------------------
   Contact Section
-------------------- */
.contact-form-container {
    background-color: var(--color-surface);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-md);
    box-shadow: var(--box-shadow-md);
    max-width: 700px;
    margin: 0 auto var(--spacing-xl) auto;
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    font-weight: bold;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    background-color: var(--color-background-alt); /* Slightly different from surface for depth */
    color: var(--color-text-primary);
    border-radius: var(--border-radius-sm);
    font-family: var(--font-primary);
    font-size: var(--text-base-size);
    transition: border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.2);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.contact-details {
    text-align: center;
    color: var(--color-text-secondary);
}
.contact-details p {
    margin-bottom: var(--spacing-sm);
}
.contact-details strong {
    color: var(--color-text-primary);
}

/* -------------------
   Footer
-------------------- */
.site-footer {
    background-color: var(--color-background-alt);
    padding-top: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-secondary);
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.site-footer h4 {
    font-family: var(--font-headings);
    color: var(--color-text-headings);
    font-size: var(--text-lg);
    margin-bottom: var(--spacing-md);
}

.footer-nav ul,
.footer-social ul {
    list-style: none;
}

.footer-nav li a,
.footer-social li a {
    color: var(--color-text-secondary);
    text-decoration: none;
    display: inline-block;
    padding: var(--spacing-xs) 0;
    transition: color var(--transition-smooth);
}

.footer-nav li a:hover, .footer-nav li a:focus,
.footer-social li a:hover, .footer-social li a:focus {
    color: var(--color-accent);
}

.footer-social .social-links li {
    margin-bottom: var(--spacing-sm); /* Spacing for text links */
}
/* No specific icon styles as they are text links */

.footer-contact p {
    margin-bottom: var(--spacing-xs);
    font-size: var(--text-sm);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    font-size: var(--text-sm);
}

/* -------------------
   Utility Classes & Animations
-------------------- */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px); /* Start slightly lower */
    transition: opacity 0.8s cubic-bezier(0.645, 0.045, 0.355, 1), transform 0.8s cubic-bezier(0.645, 0.045, 0.355, 1);
    transition-delay: 0.2s; /* Slight delay for staggered effect if needed */
}

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

/* -------------------
   Specific Page Styles
-------------------- */
/* success.html */
.success-page-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    text-align: center;
    padding: var(--spacing-xl);
}
.success-page-container h1 {
    color: var(--color-success);
    font-size: clamp(2.5rem, 6vw, 4rem);
}
.success-page-container .btn {
    margin-top: var(--spacing-lg);
}

/* privacy.html, terms.html */
.privacy-policy-page,
.terms-conditions-page {
    padding-top: calc(var(--header-height) + var(--spacing-xl)); /* Offset for fixed header */
    padding-bottom: var(--spacing-section);
    min-height: calc(100vh - var(--header-height)); /* Ensure footer is pushed down */
}
.privacy-policy-page .container,
.terms-conditions-page .container {
    max-width: 800px; /* Readable width for text-heavy pages */
}
.privacy-policy-page h1, .terms-conditions-page h1 {
    margin-bottom: var(--spacing-xl);
}
.privacy-policy-page h2, .terms-conditions-page h2 {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent);
}
.privacy-policy-page p, .terms-conditions-page p,
.privacy-policy-page ul, .terms-conditions-page ul {
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}
.privacy-policy-page ul, .terms-conditions-page ul {
    list-style-position: inside;
    padding-left: var(--spacing-md);
}


/* -------------------
   Responsive Design
-------------------- */
@media (max-width: 992px) {
    .timeline::after {
        left: 30px; /* Move line to the left for single column */
    }
    .timeline-item {
        width: 100%;
        padding-left: 70px; /* Space for circle + content */
        padding-right: var(--spacing-md);
    }
    .timeline-item:nth-child(odd),
    .timeline-item:nth-child(even) {
        left: 0;
    }
    .timeline-item::after { /* Circle on the left */
        left: 20px; /* Position circle relative to the new line */
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: block; /* Show burger icon */
        z-index: 1001; /* Above menu items */
    }

    .main-nav .nav-menu {
        display: none; /* Hide menu by default */
        flex-direction: column;
        position: absolute;
        top: var(--header-height); /* Position below header */
        left: 0;
        width: 100%;
        background-color: var(--color-background-alt); /* Solid background for mobile menu */
        padding: var(--spacing-lg) 0;
        box-shadow: var(--box-shadow-md);
        border-top: 1px solid var(--color-border);
    }

    .main-nav.nav-open .nav-menu {
        display: flex; /* Show menu when .nav-open is added */
    }

    .main-nav .nav-menu li {
        width: 100%;
        text-align: center;
    }

    .main-nav .nav-menu li a {
        display: block;
        padding: var(--spacing-md);
        width: 100%;
        border-bottom: 1px solid var(--color-border);
    }
    .main-nav .nav-menu li:last-child a {
        border-bottom: none;
    }

    .hero-section {
        min-height: calc(80vh - var(--header-height)); /* Slightly less height on mobile */
        background-attachment: scroll; /* Parallax can be janky on mobile */
    }

    .footer-container {
        grid-template-columns: 1fr; /* Stack footer columns */
        text-align: center;
    }
    .footer-nav ul, .footer-social ul {
        padding-left: 0;
    }
}

/* Read more link style */
.read-more-link {
    display: inline-block;
    font-weight: bold;
    color: var(--color-accent);
    text-decoration: none;
    position: relative;
    padding-right: 20px; /* Space for arrow */
    transition: color var(--transition-smooth);
}

.read-more-link::after {
    content: '→'; /* Or use an SVG icon */
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    transition: transform var(--transition-smooth);
}

.read-more-link:hover, .read-more-link:focus {
    color: var(--color-accent-hover);
    text-decoration: underline;
}

.read-more-link:hover::after, .read-more-link:focus::after {
    transform: translateY(-50%) translateX(3px);
}

nav ul{
    flex-wrap: wrap;
}