/* ==============================
   CSS Custom Properties (Variables)
============================== */
:root {
    --bg-dark: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.7);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #38bdf8;
    --accent-hover: #0ea5e9;
    --nav-bg: rgba(15, 23, 42, 0.85);
    
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
}

/* ==============================
   Global Styles & Resets
============================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

/* Typography Utilities */
.highlight {
    color: var(--accent);
}

.mt-4 { margin-top: 2rem; }

/* ==============================
   Layouts & Components
============================== */
.grid-layout {
    display: grid;
    gap: 2rem;
    grid-template-columns: 1fr;
}
@media (min-width: 768px) {
    .grid-layout { grid-template-columns: repeat(2, 1fr); }
    .about-content { grid-template-columns: 2fr 1fr; }
    .skills-container { grid-template-columns: repeat(3, 1fr); }
}

.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    border-color: rgba(56, 189, 248, 0.3);
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    font-family: var(--font-heading);
}

.primary-btn {
    background-color: var(--accent);
    color: var(--bg-dark);
}

.primary-btn:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
}

.outline-btn {
    border: 2px solid var(--accent);
    color: var(--accent);
}

.outline-btn:hover {
    background-color: rgba(56, 189, 248, 0.1);
    transform: translateY(-2px);
}

/* ==============================
   Navigation
============================== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.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;
    font-family: var(--font-heading);
    color: var(--accent);
    letter-spacing: 1px;
}

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

.nav-links li a {
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

.nav-links li a:hover {
    color: var(--accent);
}

.hamburger {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg-dark);
        padding: 1rem 2rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .nav-links.active {
        display: flex;
    }
    .hamburger { display: block; }
}

/* ==============================
   Sections (General)
============================== */
section {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
}

/* ==============================
   Hero Section
============================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 8rem;
    flex-wrap: wrap;
    gap: 3rem;
}

.hero-content {
    flex: 1;
    min-width: 300px;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

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

.social-icons a {
    font-size: 1.5rem;
    color: var(--text-muted);
    transition: all 0.3s ease;
}

.social-icons a:hover {
    color: var(--accent);
    transform: translateY(-3px);
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    min-width: 300px;
}

.image-wrapper {
    width: 350px;
    height: 350px;
    border-radius: 50%;
    padding: 10px;
    background: linear-gradient(135deg, var(--accent), transparent);
    animation: float 6s ease-in-out infinite;
}

.image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    background-color: var(--bg-card); /* Fallback */
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
    100% { transform: translateY(0px); }
}

@media (max-width: 768px) {
    .hero-title { font-size: 2.5rem; }
    .hero { text-align: center; justify-content: center; }
    .hero-actions { justify-content: center; }
    .social-icons { justify-content: center; }
}

/* ==============================
   About & Stats
============================== */
.about-text p {
    margin-bottom: 1rem;
    color: var(--text-muted);
}
.about-stats {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 1.5rem;
    text-align: center;
}
.stat h3 {
    font-size: 1.5rem;
    color: var(--accent);
}
.stat p {
    font-size: 0.9rem;
    color: var(--text-muted);
}
.education-snippet {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 1.5rem;
}
.timeline-item h4 {
    margin: 0.5rem 0 0.2rem;
}
.timeline-date {
    font-size: 0.85rem;
    color: var(--accent);
}
.timeline-detail {
    font-size: 0.9rem;
    color: var(--text-muted);
}

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

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: rgba(56, 189, 248, 0.3);
}

.timeline-point {
    position: relative;
    padding-left: 60px;
    margin-bottom: 3rem;
}

.timeline-marker {
    position: absolute;
    left: 14px;
    top: 5px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    border: 3px solid var(--bg-dark);
}

.timeline-content h3 { font-size: 1.4rem; }
.timeline-content h4 { color: var(--text-muted); font-weight: 400; margin-bottom: 0.5rem; }
.timeline-content .date { font-size: 0.85rem; color: var(--accent); margin-bottom: 1rem; }
.timeline-content ul { padding-left: 1.2rem; color: var(--text-muted); font-size: 0.95rem; }
.timeline-content li { list-style-type: disc; margin-bottom: 0.5rem; }

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

.project-card {
    display: flex;
    flex-direction: column;
}

.project-content h3 { margin-bottom: 1rem; }
.project-content p { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 1.5rem; flex-grow: 1; }

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-stack span {
    background: rgba(56, 189, 248, 0.1);
    color: var(--accent);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-family: var(--font-heading);
}

/* ==============================
   Skills Section
============================== */
.skill-category {
    text-align: center;
}

.category-icon {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.skill-category h3 { margin-bottom: 1.5rem; }

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.8rem;
}

.skill-tags span {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.skill-tags span:hover {
    background: var(--accent);
    color: var(--bg-dark);
    border-color: var(--accent);
    transform: translateY(-2px);
}

/* ==============================
   Certs & Leadership
============================== */
.clean-list li {
    margin-bottom: 1rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 10px;
}
.clean-list i { color: var(--accent); font-size: 0.9rem; }

/* ==============================
   Footer / Contact
============================== */
footer {
    background: var(--bg-card);
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 4rem 2rem 2rem;
    text-align: center;
}

.footer-container {
    max-width: 800px;
    margin: 0 auto;
}

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

.contact-methods {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 2rem;
    margin: 2rem 0;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-main);
    transition: color 0.3s;
}

.contact-item:hover { color: var(--accent); }

.refs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
    text-align: left;
}

.ref-card { padding: 1.5rem; }
.ref-card h4 { color: var(--text-main); }
.ref-card p { margin-top: 0.2rem; font-size: 0.9rem; }
.ref-contact { font-family: var(--font-heading); color: var(--accent) !important; display: flex; align-items: center; gap: 8px;}

.copyright {
    margin-top: 4rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 2rem;
    font-size: 0.85rem;
}

/* ==============================
   Animations (Scroll Reveal)
============================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

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

.reveal-delay {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease 0.3s;
}

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