:root {
    --primary: #ffffff; /* White text for premium contrast */
    --primary-dark: #e5e5e5;
    --accent: #38bdf8; /* Blueprint Blue */
    --bg: #050505; /* Deep Space Black */
    --bg-alt: #0a0a0a;
    --text: #ffffff;
    --text-muted: #a3a3a3;
    --glass: rgba(5, 5, 5, 0.7); /* Darker, less glassy */
    --glass-border: rgba(255, 255, 255, 0.15); /* Technical lines */
    --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    cursor: none !important; /* Hide default cursor for custom one */
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6, .logo, .section-title, .builder-header h2 {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Custom Cursor - Engineering Crosshair style can be cool, keeping circle for now but white */
.custom-cursor {
    width: 20px;
    height: 20px;
    background: transparent;
    border: 1px solid var(--primary);
    border-radius: 50%;
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    transition: transform 0.1s ease-out, background 0.3s;
    mix-blend-mode: difference;
}

.custom-cursor.link-hover {
    transform: scale(3);
    background: var(--primary);
    mix-blend-mode: difference;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    backdrop-filter: blur(12px);
    background: rgba(5, 5, 5, 0.85); /* Deep cosmic black */
    border-bottom: 1px solid var(--glass-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -1px;
}

.logo span {
    color: var(--primary);
}

.navbar ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.navbar ul a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.navbar ul a:hover {
    color: var(--primary);
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    text-align: center;
    padding: 0 1rem;
}

/* Cosmic Background */
.cosmic-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../images/cosmic_bg.png') no-repeat center center;
    background-size: cover;
    z-index: -1;
    opacity: 0.8; /* Increased opacity */
}
.cosmic-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(5,5,5,0.2), #050505);
}

.badge {
    display: none; /* Removing as per design request */
}

.hero h1 {
    font-size: clamp(3.5rem, 10vw, 7rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 2rem;
    letter-spacing: -0.02em;
}

#typing-text {
    color: var(--accent);
    background: linear-gradient(to right, var(--accent), #ffffff);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 2.5rem;
}

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

.primary-btn, .secondary-btn, .submit-btn {
    padding: 1rem 2.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.primary-btn {
    background: var(--primary);
    color: var(--bg);
    border: none;
}

.primary-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(56, 189, 248, 0.2);
}

.secondary-btn {
    background: var(--glass);
    color: var(--text);
    border: 1px solid var(--glass-border);
}

.secondary-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
}

.glass-btn {
    padding: 0.5rem 1rem;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 0.5rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.glass-btn:hover {
    background: var(--primary);
    color: var(--bg);
    border-color: var(--primary);
}

/* Sections */
.section {
    padding: 8rem 0;
}

.section.dark {
    background: var(--bg-alt);
    position: relative;
}

.section.dark::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../images/tech_blueprint_overlay.png') repeat;
    opacity: 0.05;
    pointer-events: none;
    z-index: 0;
}

.section.dark .container {
    position: relative;
    z-index: 1;
}

#about {
    position: relative;
    overflow: hidden;
}

#about::before {
    content: '';
    position: absolute;
    top: 50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: url('../images/about_bg.png') no-repeat center center;
    background-size: contain;
    opacity: 0.15;
    z-index: -1;
    pointer-events: none;
    mix-blend-mode: screen;
    transform: translateY(-50%);
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: 4rem;
    text-align: center;
    letter-spacing: -1px;
}

/* About Section Grid */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    align-items: center;
}

.about-image-container {
    display: flex;
    justify-content: center;
}

.profile-frame {
    width: 300px;
    height: 380px;
    border: 1px solid var(--glass-border);
    padding: 1rem;
    position: relative;
    background: var(--glass);
    transition: var(--transition);
}

.profile-frame::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    width: 30px;
    height: 30px;
    border-top: 2px solid var(--accent);
    border-left: 2px solid var(--accent);
}

.profile-frame:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
}

.profile-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(0.2);
    transition: var(--transition);
}

.profile-frame:hover .profile-img {
    filter: grayscale(0);
}

@media (max-width: 968px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .profile-frame {
        width: 250px;
        height: 320px;
    }
}


/* Skills & Chip Selection */
.skills-selector-container {
    max-height: 400px;
    overflow-y: auto;
    padding-right: 1rem;
}

.skill-category {
    margin-bottom: 1.5rem;
}

.skill-category h4 {
    color: var(--primary);
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.skill-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.skill-chip {
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 2rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
    user-select: none;
}

.skill-chip:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
}

.skill-chip.selected {
    background: var(--primary);
    color: var(--bg);
    border-color: var(--primary);
    box-shadow: 0 4px 12px rgba(56, 189, 248, 0.3);
}

/* Dynamic Skills Grid on Home Page */
.skills-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    max-width: 900px;
    margin: 0 auto;
}

.skills-grid .skill-tag {
    padding: 0.75rem 1.5rem;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 0.75rem;
    font-size: 1rem;
    color: var(--text);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.skills-grid .skill-tag:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(56, 189, 248, 0.1);
}

.skills-grid .skill-tag span {
    color: var(--primary);
}

/* Project Filtering */
.filter-btns {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.filter-btn {
    padding: 0.5rem 1.5rem;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 2rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn.active, .filter-btn:hover {
    background: var(--primary);
    color: var(--bg);
    border-color: var(--primary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    position: relative;
    border-radius: 1.5rem;
    padding: 3rem;
    transition: var(--transition);
    overflow: hidden;
    background-image: url('../images/tech_blueprint_solid.png');
    background-size: cover;
    background-blend-mode: screen;
}

.project-glow {
    position: absolute;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(56, 189, 248, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s;
    transform: translate(-50%, -50%);
}

.project-card:hover {
    transform: translateY(-10px);
    border-color: rgba(56, 189, 248, 0.5);
    background: rgba(255, 255, 255, 0.05);
}

.project-card:hover .project-glow {
    opacity: 1;
}

/* Impact Section */
.problem-card {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 2rem;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 1.5rem;
    overflow: hidden;
}

.problem-content, .solution-content {
    padding: 3rem;
}

.problem-content {
    background: rgba(239, 68, 68, 0.03);
    border-right: 1px solid var(--glass-border);
}

.solution-content {
    background: rgba(56, 189, 248, 0.03);
}

.problem-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.problem-header h3 {
    margin: 0;
    font-size: 1.25rem;
    color: var(--primary);
}

.icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(56, 189, 248, 0.1);
    border: 1px solid var(--glass-border);
    border-radius: 0.5rem;
    color: var(--accent);
}

.problem-content .icon {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}


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

.testimonial-card {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    padding: 2.5rem;
    border-radius: 1.5rem;
    font-style: italic;
}

.user-info {
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    font-style: normal;
}

.user-info strong {
    color: var(--primary);
}

/* Reveal System */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.reveal-item {
    opacity: 0;
    transform: scale(0.9);
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-item.active {
    opacity: 1;
    transform: scale(1);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-100px);
    transition: all 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-left.active {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(100px);
    transition: all 1s cubic-bezier(0.16, 1, 0.3, 1);
}


/* Floating Animations */
@keyframes float-y {
    0%, 100% { transform: translateY(-20px); }
    50% { transform: translateY(20px); }
}

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

.floating-sat {
    position: absolute;
    top: 10%;
    right: 5%;
    width: 250px;
    height: 250px;
    background: url('../images/technical_satellite_drawing.png') no-repeat center center;
    background-size: contain;
    opacity: 0.8;
    animation: float-y 6s ease-in-out infinite;
    pointer-events: none;
    z-index: 0;
    mix-blend-mode: screen; /* Removes black, keeping white lines */
    filter: drop-shadow(0 0 10px rgba(56, 189, 248, 0.3));
}

.rotating-gear {
    position: absolute;
    bottom: -100px;
    left: -100px;
    width: 400px;
    height: 400px;
    background: url('../images/technical_gear_drawing.png') no-repeat center center;
    background-size: contain;
    opacity: 0.3;
    animation: spin-slow 30s linear infinite;
    pointer-events: none;
    z-index: -1;
    mix-blend-mode: screen;
}


/* Nebula Accent */
.nebula-accent {
    position: absolute;
    width: 600px;
    height: 600px;
    background: url('../images/cosmic_nebula_accent.png') no-repeat center center;
    background-size: contain;
    opacity: 0.4;
    z-index: -1;
    pointer-events: none;
    mix-blend-mode: screen;
}

/* Contact Loader */
.submit-btn.loading .btn-text {
    opacity: 0;
}

.btn-loader {
    width: 20px;
    height: 20px;
    border: 2px solid white;
    border-radius: 50%;
    border-top-color: transparent;
    position: absolute;
    top: 50%;
    left: 50%;
    margin: -10px 0 0 -10px;
    opacity: 0;
    animation: spin 0.8s linear infinite;
}

.submit-btn.loading .btn-loader {
    opacity: 1;
}

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

/* Contact Section */
.contact-wrapper {
    max-width: 600px;
    margin: 0 auto;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
}

.form-group input, .form-group textarea, 
.project-input-group input, .project-input-group textarea {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 0.75rem;
    padding: 1.25rem;
    color: var(--text);
    font-family: inherit;
    transition: var(--transition);
    width: 100%;
}

.form-group input:focus, .form-group textarea:focus,
.project-input-group input:focus, .project-input-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.05);
    box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.1);
}

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

.form-group input.error, .form-group textarea.error,
.project-input-group input.error, .project-input-group textarea.error {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.05);
}

.form-group input[type="color"] {
    padding: 0.5rem;
    height: 50px;
    cursor: pointer;
}

/* Footer */
footer {
    padding: 4rem 2rem;
    border-top: 1px solid var(--glass-border);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.social-links {
    display: flex;
    gap: 2rem;
}

.social-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

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

/* Portfolio Builder Overlay */
.builder-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(3, 7, 18, 0.9);
    backdrop-filter: blur(20px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    transition: opacity 0.5s ease;
}

.builder-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.builder-card {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    padding: 3rem;
    border-radius: 2rem;
    max-width: 600px;
    width: 90%;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    max-height: 90vh;
    overflow-y: auto;
}

.builder-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.builder-header h2 span {
    color: var(--primary);
}

.builder-header p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.form-step {
    display: none;
    animation: fadeIn 0.4s ease;
}

.form-step.active {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-step h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--primary);
}

.project-input-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 1rem;
    border: 1px solid var(--glass-border);
}

.step-btns {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.step-btns .secondary-btn, .step-btns .primary-btn {
    flex: 1;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
    .navbar ul {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(3, 7, 18, 0.95);
        padding: 2rem;
        border-bottom: 1px solid var(--glass-border);
        backdrop-filter: blur(10px);
    }

    .navbar ul.active { display: flex; }
    .problem-card { grid-template-columns: 1fr; }
    .problem-content { border-right: none; border-bottom: 1px solid var(--glass-border); }
}

/* AI Chatbot Styles */
.ai-chatbot-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 1500;
}

.chatbot-trigger {
    background: var(--glass);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    padding: 0.75rem 1.5rem;
    border-radius: 3rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.chatbot-trigger:hover {
    transform: translateY(-5px) scale(1.05);
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.05);
}

.robot-avatar {
    width: 40px;
    height: 40px;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.robot-head {
    width: 24px;
    height: 18px;
    background: var(--accent);
    border-radius: 4px;
    position: relative;
    animation: breathing 3s ease-in-out infinite;
}

.eyes {
    display: flex;
    gap: 6px;
    position: absolute;
    top: 5px;
    left: 4px;
}

.eye {
    width: 4px;
    height: 4px;
    background: var(--bg);
    border-radius: 50%;
}

.robot-body {
    width: 16px;
    height: 10px;
    background: var(--primary-dark);
    border-radius: 2px 2px 8px 8px;
    margin-top: 2px;
}

.trigger-text {
    font-weight: 600;
    font-size: 0.9rem;
}

.chat-window {
    position: absolute;
    bottom: calc(100% + 1.5rem);
    right: 0;
    width: 350px;
    height: 500px;
    background: rgba(3, 7, 18, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 1.5rem;
    display: none;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    transform: translateY(20px);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.chat-window.active {
    display: flex;
    transform: translateY(0);
    opacity: 1;
}

.chat-header {
    padding: 1.25rem;
    background: var(--glass);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.bot-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: #10b981;
    border-radius: 50%;
    box-shadow: 0 0 10px #10b981;
}

.chat-actions {
    display: flex;
    gap: 0.5rem;
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.1rem;
    padding: 0.25rem;
    transition: var(--transition);
}

.icon-btn:hover {
    color: var(--primary);
    transform: scale(1.1);
}

.chat-messages {
    flex: 1;
    padding: 1.25rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.message {
    max-width: 85%;
    padding: 0.85rem 1.25rem;
    border-radius: 1rem;
    font-size: 0.9rem;
    line-height: 1.4;
    animation: messageIn 0.3s ease-out;
}

.message.bot {
    align-self: flex-start;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-bottom-left-radius: 0;
}

.message.user {
    align-self: flex-end;
    background: var(--primary);
    color: var(--bg);
    font-weight: 500;
    border-bottom-right-radius: 0;
}

.chat-input-area {
    padding: 1.25rem;
    background: var(--glass);
    border-top: 1px solid var(--glass-border);
    display: flex;
    gap: 0.75rem;
}

.input-wrapper {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
}

#chat-input {
    width: 100%;
    background: var(--bg);
    border: 1px solid var(--glass-border);
    padding: 0.75rem 2.5rem 0.75rem 1rem;
    border-radius: 0.5rem;
    color: var(--text);
    font-family: inherit;
    font-size: 0.9rem;
}

#voice-btn {
    position: absolute;
    right: 0.5rem;
}

#voice-btn.recording {
    color: #ef4444;
    animation: pulse 1.5s infinite;
}

.builder-footer {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
    text-align: center;
}

@keyframes breathing {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-3px); }
}

@keyframes messageIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.2); opacity: 0.7; }
    100% { transform: scale(1); opacity: 1; }
}