/*** Variables & Reset ***/
:root {
    --primary-color: #4285f4;
    --primary-dark: #3367d6;
    --secondary-color: #34a853;
    --accent-color: #fbbc05;
    --danger-color: #ea4335;
    --dark-bg: #000000; /* Darker background color */
    --darker-bg: #000000; /* Even darker background */
    --card-bg: #0a0a0a; /* Darker card background */
    --card-bg-hover: #1a1a1a; /* Darker card hover background */
    --border-color: #222222; /* Darker border color */
    --text-color: #e0e0e0;
    --text-muted: #a0a0a0;
    --text-bright: #ffffff;
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.5); /* Stronger shadow */
    --transition-speed: 0.3s;
    --border-radius: 8px;
    --font-main: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', Oxygen, Ubuntu, Cantarell, 'Open Sans', sans-serif;
}

/* Font Awesome icon fixes */
i.fas, i.far, i.fab, i.fa {
    display: inline-block !important;
    font-style: normal !important;
    font-variant: normal !important;
    font-family: "Font Awesome 5 Free", "Font Awesome 5 Brands" !important;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--dark-bg);
    overflow-x: hidden;
}

/*** Typography ***/
h1, h2, h3, h4, h5, h6 {
    margin-bottom: 1rem;
    line-height: 1.2;
    font-weight: 600;
    color: var(--text-bright);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    text-align: center;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: -0.03em;
}

h2 {
    font-size: 2rem;
    color: var(--primary-color);
    position: relative;
    margin-bottom: 2rem;
    text-align: center; /* Center align h2 */
    width: 100%; /* Full width for better alignment */
}

h2::after {
    content: "";
    position: absolute;
    bottom: -0.5rem;
    left: 50%; /* Center the underline */
    transform: translateX(-50%); /* Center the underline */
    width: 120px; /* Wider underline */
    height: 4px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

h3 {
    font-size: 1.5rem;
    color: var(--text-bright);
}

p {
    margin-bottom: 1.2rem;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-speed) ease;
}

a:hover {
    color: var(--primary-dark);
    text-decoration: none;
}

/*** Main Content Styles ***/
.main-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.roadmap-selection {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.roadmap-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.roadmap-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(66, 133, 244, 0.05) 0%, 
        rgba(52, 168, 83, 0.05) 100%);
    opacity: 0;
    transition: opacity var(--transition-speed) ease;
    z-index: 0;
}

.roadmap-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
    border-color: var(--primary-color);
}

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

.roadmap-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    transition: transform var(--transition-speed) ease, color var(--transition-speed) ease;
}

.roadmap-card:hover .roadmap-icon {
    transform: scale(1.1);
    color: var(--secondary-color);
}

.roadmap-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-align: center;
    transition: color var(--transition-speed) ease;
}

.roadmap-card:hover .roadmap-title {
    color: var(--primary-color);
}

.roadmap-description {
    color: var(--text-muted);
    text-align: center;
    font-size: 0.9rem;
    margin-top: 0.5rem;
    z-index: 1;
}

#roadmap-content {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--card-shadow);
    min-height: 300px; /* Ensure there's some visible space even if empty */
    transition: all var(--transition-speed) ease;
    animation: fadeIn 0.5s ease-in-out;
}

.placeholder-message {
    text-align: center;
    color: var(--text-muted);
    animation: bounce 2s infinite;
    padding: 2rem;
}

.placeholder-message i {
    font-size: 2rem;
    margin-bottom: 1rem;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-15px);
    }
    60% {
        transform: translateY(-7px);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/*** FAQ Section ***/
.faq-section {
    margin: 3rem 0;
}

.faq-item {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4); /* Stronger shadow */
    transition: box-shadow var(--transition-speed) ease, transform var(--transition-speed) ease, background-color var(--transition-speed) ease;
    border: 1px solid var(--border-color);
}

.faq-item:hover {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5); /* Stronger shadow on hover */
    transform: translateY(-2px);
    background-color: var(--card-bg-hover);
}

.faq-item h3 {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    color: var(--primary-color);
    position: relative;
    padding-left: 1.8rem;
}

.faq-item h3::before {
    content: "Q:";
    position: absolute;
    left: 0;
    top: 0;
    color: var(--accent-color);
    font-weight: 700;
}

.faq-item p {
    padding-left: 1.8rem;
    position: relative;
    color: var(--text-color);
}

.faq-item p::before {
    content: "A:";
    position: absolute;
    left: 0;
    top: 0;
    color: var(--secondary-color);
    font-weight: 700;
}

/*** Related Tools Section ***/
.related-tools {
    margin: 3rem auto;
    padding: 3rem 1.5rem;
    max-width: 1200px;
    background-color: #000;
    color: #fff;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.related-tools h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--primary-color);
}

.tools-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
    width: 100%;
}

.tool-card {
    text-decoration: none;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 1.8rem;
    box-shadow: var(--card-shadow);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease, background-color var(--transition-speed) ease;
    color: var(--text-color);
    position: relative;
    overflow: hidden;
    z-index: 1;
    border: 1px solid var(--border-color);
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: height var(--transition-speed) ease;
    z-index: -1;
}

.tool-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.5); /* Stronger shadow */
    background-color: var(--card-bg-hover);
}

.tool-card:hover::before {
    height: 100%;
    opacity: 0.1;
}

.tool-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.2rem;
    transition: transform var(--transition-speed) ease, color var(--transition-speed) ease;
}

.tool-card:hover i {
    transform: scale(1.2);
    color: var(--secondary-color);
}

.tool-card h3 {
    margin-bottom: 0.8rem;
    color: var(--text-bright);
}

.tool-card p {
    color: var(--text-muted);
}

/*** Footer ***/
.footer {
    position: relative;
    background-color: var(--footer-bg);
    color: var(--text-light);
    padding: 3rem 1.5rem 1.5rem;
    margin-top: 4rem;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    gap: 2rem;
}

.footer-section h3 {
    color: var(--text-bright);
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.8rem;
}

.footer-section h3::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 1.5px;
}

.footer-section p {
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.tagline {
    font-style: italic;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.8rem;
}

.footer-section ul li a {
    color: var(--text-muted);
    transition: color var(--transition-speed) ease, transform var(--transition-speed) ease;
    display: inline-block;
}

.footer-section ul li a:hover {
    color: var(--text-bright);
    transform: translateX(5px);
}

.feedback-link {
    display: inline-block;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    color: var(--text-bright);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 500;
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.feedback-link:hover {
    color: var(--text-bright);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(66, 133, 244, 0.3);
}

.social-icons {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    color: var(--text-color);
    font-size: 1.2rem;
    transition: transform var(--transition-speed) ease, background var(--transition-speed) ease, color var(--transition-speed) ease;
}

.social-icons a:hover {
    transform: translateY(-5px);
    background: var(--primary-color);
    color: var(--text-bright);
}

.footer-bottom {
    max-width: 1400px;
    margin: 2rem auto 0;
    padding: 1.5rem;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.9rem;
}

.developer-name {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 600;
}

.footer-bottom a {
    color: var(--text-muted);
    transition: color var(--transition-speed) ease;
}

.footer-bottom a:hover {
    color: var(--text-bright);
}

/*** Responsive Design ***/
@media screen and (max-width: 768px) {
    html, body {
        overflow-x: hidden;
    }
    
    body {
        position: relative;
        width: 100%;
    }
    
    .roadmap-container {
        max-width: 100%;
        padding: 1.5rem;
    }
    
    .semester-tabs {
        flex-wrap: wrap;
    }
    
    .semester-tab {
        flex: 0 0 48%;
        margin-bottom: 10px;
    }
    
    .course-card {
        width: 100%;
    }
    
    .footer-content {
        flex-direction: column;
    }
}

/*** Animations & Effects ***/
@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(66, 133, 244, 0.4);
    }
    70% {
        box-shadow: 0 0 0 15px rgba(66, 133, 244, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(66, 133, 244, 0);
    }
}

@keyframes float {
    0% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
    100% {
        transform: translateY(0px);
    }
}

/* Loading Spinner Animation */
@keyframes spinner {
    to {
        transform: rotate(360deg);
    }
}

/* Tech-inspired circuit board pattern for background effects */
.tech-pattern {
    position: relative;
}

.tech-pattern::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(66, 133, 244, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(66, 133, 244, 0.05) 1px, transparent 1px);
    background-size: 20px 20px;
    z-index: -1;
    opacity: 0.2;
}

/* Glow effect for dark theme elements */
.glow-on-hover {
    position: relative;
    overflow: hidden;
}

.glow-on-hover::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(66, 133, 244, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-speed) ease;
    pointer-events: none;
}

.glow-on-hover:hover::after {
    opacity: 1;
}

/* Custom Scrollbar - Make it smaller and minimal */
::-webkit-scrollbar {
    width: 3px;
    height: 3px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.02);
    border-radius: 2px;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 2px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-hover);
}

/* Firefox scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) rgba(0, 0, 0, 0.02);
}

/* Progress Animation */
.progress-bar {
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    width: 0;
    transition: width 0.6s ease;
    border-radius: 2px;
}

/* Tooltip Styles */
[data-tooltip] {
    position: relative;
}

[data-tooltip]::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) scale(0);
    background: var(--card-bg);
    color: var(--text-bright);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-size: 0.875rem;
    white-space: nowrap;
    transition: transform var(--transition-speed) ease;
    z-index: 10;
    pointer-events: none;
    opacity: 0;
    border: 1px solid var(--border-color);
}

[data-tooltip]:hover::before {
    transform: translateX(-50%) scale(1);
    opacity: 1;
}