/* --- Root Variable Matrix --- */
:root {
    --bg-main: #0A192F;
    --bg-navbar: rgba(10, 25, 47, 0.85);
    --accent: #8B5CF6;
    --accent-glow: rgba(139, 92, 246, 0.35);
    --text-primary: #F3F4F6;
    --text-secondary: #9CA3AF;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.07);
    --glass-hover-border: rgba(139, 92, 246, 0.4);
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --font-stack: 'Poppins', sans-serif;
}

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

html {
    scroll-behavior: smooth;
    font-family: var(--font-stack);
    background-color: var(--bg-main);
    color: var(--text-primary);
    overflow-x: hidden;
}

body {
    position: relative;
    overflow-x: hidden;
}

/* --- Ambient Glow Orbs --- */
.orb {
    position: absolute;
    width: 45vw;
    height: 45vw;
    border-radius: 50%;
    background: radial-gradient(circle, var(--accent-glow) 0%, rgba(0,0,0,0) 70%);
    filter: blur(40px);
    z-index: -1;
    pointer-events: none;
    animation: orbFloat 12s ease-in-out infinite alternate;
}
.orb-1 { top: -10%; left: -10%; }
.orb-2 { top: 50%; right: -15%; animation-delay: -4s; }

@keyframes orbFloat {
    0% { transform: translateY(0) scale(1); }
    100% { transform: translateY(40px) scale(1.1); }
}

/* --- Universal Component Elements --- */
.section-padding {
    padding: 100px 8% 40px 8%;
}

.section-header {
    margin-bottom: 50px;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.underline {
    width: 60px;
    height: 4px;
    background: var(--accent);
    margin-top: 10px;
    border-radius: 2px;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 12px 28px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    border: 1px solid transparent;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 24px rgba(139, 92, 246, 0.6);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    margin-left: 15px;
}

.btn-secondary:hover {
    border-color: var(--accent);
    background: rgba(139, 92, 246, 0.05);
    transform: translateY(-3px);
}

/* --- Navigation System --- */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    height: 80px;
    background: var(--bg-navbar);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-b: 1px solid var(--glass-border);
    z-index: 1000;
    transition: var(--transition-smooth);
}

.nav-container {
    max-width: 1400px;
    height: 100%;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 4%;
}

.logo {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

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

.nav-menu {
    display: flex;
    gap: 35px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 400;
    transition: var(--transition-smooth);
    position: relative;
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition-smooth);
}

.nav-link:hover::after {
    width: 100%;
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-toggle .bar {
    display: block;
    width: 25px;
    height: 2px;
    margin: 5px 0;
    background-color: var(--text-primary);
    transition: var(--transition-smooth);
}

/* --- Hero Section Architecture --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 8%;
    gap: 40px;
}

.hero-content {
    flex: 1.2;
    max-width: 700px;
}

.intro-greeting {
    color: var(--accent);
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 15px;
    display: block;
}

.hero-name {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -2px;
    margin-bottom: 15px;
    background: linear-gradient(120deg, var(--text-primary) 30%, var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-typing-container {
    font-size: 2.2rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 25px;
}

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

.cursor {
    color: var(--accent);
    animation: blink 0.8s infinite;
}

@keyframes blink {
    50% { opacity: 0; }
}

.hero-description {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 40px;
}

.hero-visual {
    flex: 0.8;
    display: flex;
    justify-content: center;
    position: relative;
}

.image-wrapper {
    position: relative;
    width: 320px;
    height: 320px;
}

.hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    position: relative;
    z-index: 2;
    animation: imageFloat 6s ease-in-out infinite alternate;
}

.glow-card-back {
    position: absolute;
    top: -10px;
    left: -10px;
    width: 100%;
    height: 100%;
    background: var(--accent-glow);
    border-radius: 24px;
    filter: blur(20px);
    z-index: 1;
}

@keyframes imageFloat {
    0% { transform: translateY(0); }
    100% { transform: translateY(-15px); }
}

/* --- About & Custom Badges --- */
.about-grid {
    max-width: 900px;
}

.about-text p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

.profile-cards-grid {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    margin-top: 35px;
}

.profile-badge {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 12px 24px;
    border-radius: 12px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition-smooth);
}

.profile-badge:hover {
    border-color: var(--glass-hover-border);
    background: rgba(139, 92, 246, 0.05);
    transform: translateY(-2px);
}

.profile-badge .arrow {
    color: var(--accent);
    transition: var(--transition-smooth);
}

.profile-badge:hover .arrow {
    transform: translateX(4px);
}

/* --- Technical Expertise System --- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 150fr));
    gap: 20px;
}

.skill-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 24px;
    border-radius: 16px;
    position: relative;
    transition: var(--transition-smooth);
}

.skill-card:hover {
    transform: translateY(-5px);
    border-color: var(--glass-hover-border);
    box-shadow: 0 10px 30px rgba(139, 92, 246, 0.1);
}

.skill-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.skill-icon {
    font-size: 1.4rem;
    color: var(--accent);
}

.skill-card h3 {
    font-size: 1.05rem;
    font-weight: 500;
}

.progress-bar {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 2px;
}

.status-learning {
    border-style: dashed;
}

.badge-status {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 0.7rem;
    text-transform: uppercase;
    background: rgba(139, 92, 246, 0.15);
    color: #c4b5fd;
    padding: 3px 8px;
    border-radius: 20px;
    letter-spacing: 0.5px;
}

/* --- Timeline Matrix --- */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background: var(--glass-border);
    top: 0;
    bottom: 0;
    left: 30px;
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
    padding-left: 70px;
}

.timeline-dot {
    position: absolute;
    width: 16px;
    height: 16px;
    left: 23px;
    top: 6px;
    background: var(--bg-main);
    border: 3px solid var(--accent);
    border-radius: 50%;
    z-index: 2;
}

.timeline-content {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 30px;
    border-radius: 16px;
}

.timeline-date {
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 600;
    display: block;
    margin-bottom: 8px;
}

.timeline-content h3 {
    font-size: 1.3rem;
    margin-bottom: 4px;
}

.timeline-content h4 {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 12px;
}

.timeline-details {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

.academic-score {
    margin-top: 15px;
    font-size: 0.95rem;
}

.score-highlight {
    color: var(--text-primary);
    font-weight: 600;
    background: rgba(255, 255, 255, 0.05);
    padding: 2px 8px;
    border-radius: 4px;
    border: 1px solid var(--glass-border);
}

/* --- Project Grid Cards --- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.project-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    overflow: hidden;
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-6px);
    border-color: var(--glass-hover-border);
}

.project-img-container {
    width: 100%;
    height: 180px;
    overflow: hidden;
}

.project-placeholder-ui {
    width: 100%;
    height: 100%;
    background-size: cover;
    transition: var(--transition-smooth);
}

.project-card:hover .project-placeholder-ui {
    transform: scale(1.05);
}

/* Abstract placeholder gradient sets to skip dynamic resource dependencies */
.portfolio-bg { background: linear-gradient(135deg, #4338ca, #6d28d9); }
.weather-bg { background: linear-gradient(135deg, #1d4ed8, #0369a1); }
.todo-bg { background: linear-gradient(135deg, #065f46, #0f766e); }
.calc-bg { background: linear-gradient(135deg, #374151, #111827); }
.future-bg { background: repeating-linear-gradient(45deg, #1f2937, #1f2937 10px, #111827 10px, #111827 20px); }

.project-info {
    padding: 25px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.project-info h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.project-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 20px;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: auto;
    margin-bottom: 20px;
}

.project-tags span {
    font-size: 0.75rem;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--glass-border);
    padding: 4px 10px;
    border-radius: 6px;
    color: var(--text-secondary);
}

.project-links {
    display: flex;
    gap: 12px;
}

.proj-btn {
    flex: 1;
    text-align: center;
    padding: 10px 0;
    border-radius: 6px;
    font-size: 0.85rem;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-smooth);
}

.p-primary {
    background: rgba(139, 92, 246, 0.1);
    color: #c4b5fd;
    border: 1px solid rgba(139, 92, 246, 0.2);
}

.p-primary:hover {
    background: var(--accent);
    color: #fff;
}

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

.p-secondary:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

.future-card {
    opacity: 0.75;
    border-style: dashed;
}

.info-badge {
    position: static;
    display: inline-block;
    align-self: flex-start;
    margin-bottom: 12px;
}

/* --- Contact Core --- */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 50px;
    max-width: 1100px;
}

.contact-info h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
}

.contact-info p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 30px;
}

.method-item {
    display: flex;
    align-items: center;
    gap: 15px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 20px;
    border-radius: 12px;
}

.m-icon {
    font-size: 1.5rem;
}

.method-item h4 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.method-item a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
}

/* Minimalist floating form layout */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.form-group {
    position: relative;
    width: 100%;
}

.form-group input,
.form-group textarea {
    width: 100%;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 16px;
    border-radius: 10px;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font-stack);
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

.form-group textarea {
    resize: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 15px rgba(139, 92, 246, 0.15);
}

.form-group label {
    position: absolute;
    left: 16px;
    top: 16px;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
    pointer-events: none;
    font-size: 0.95rem;
}

/* Floating operational labels */
.form-group input:focus ~ label,
.form-group input:not(:placeholder-shown) ~ label,
.form-group textarea:focus ~ label,
.form-group textarea:not(:placeholder-shown) ~ label {
    top: -10px;
    left: 12px;
    font-size: 0.75rem;
    background: var(--bg-main);
    padding: 2px 8px;
    color: var(--accent);
    border-radius: 4px;
}

.form-submit {
    border: none;
    justify-content: center;
}

/* --- Footer Output --- */
.footer {
    border-top: 1px solid var(--glass-border);
    padding: 40px 0;
    text-align: center;
}

.footer-highlight {
    color: var(--accent);
    font-weight: 500;
}

.footer-sub {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-top: 8px;
}

/* --- Optimized Performance Display Intersections --- */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* --- System Responsive Breakpoints --- */
@media (max-width: 968px) {
    .hero {
        flex-direction: column-reverse;
        justify-content: center;
        text-align: center;
        padding-top: 140px;
    }
    .hero-content {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    .hero-name { font-size: 3rem; }
    .hero-typing-container { font-size: 1.7rem; }
    .contact-container { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .mobile-toggle { display: block; }
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--bg-main);
        flex-direction: column;
        align-items: center;
        padding-top: 50px;
        transition: var(--transition-smooth);
    }
    .nav-menu.active { left: 0; }
    .mobile-toggle.active .bar:nth-child(2) { opacity: 0; }
    .mobile-toggle.active .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .mobile-toggle.active .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
    .section-padding { padding: 80px 5% 30px 5%; }
}