/* ================= THEME VARIABLES ================= */
:root {
    /* Dark Mode (Default) */
    --bg-color: #0c0c14;
    --primary-color: #8a2be2; /* BlueViolet */
    --secondary-color: #00d1e0; /* Bright Cyan */
    --text-color: #e0e0e0;
    --text-muted-color: #a0a0a0;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --card-shadow: none;
    --nav-bg: rgba(12, 12, 20, 0.7);
    --font-family: 'Poppins', sans-serif;
}

body.light-mode {
    /* Light Mode Overrides */
    --bg-color: #f4f7fc;
    --primary-color: #6a11cb; /* Darker Purple for contrast */
    --secondary-color: #2575fc; /* Stronger Blue */
    --text-color: #2c3e50;
    --text-muted-color: #7f8c8d;
    --card-bg: #ffffff;
    --card-border: #e0e0e0;
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.07);
    --nav-bg: rgba(255, 255, 255, 0.7);
}

/* ================= GLOBAL STYLES ================= */
::selection { background-color: var(--primary-color); color: white; }
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-color); }
::-webkit-scrollbar-thumb { background: var(--primary-color); border-radius: 4px; }

html { scroll-behavior: smooth; }
body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-family);
    overflow-x: hidden;
    cursor: none;
    transition: background-color 0.4s ease, color 0.4s ease;
}
.section-title {
    font-weight: 700; font-size: 2.8rem; text-align: center;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
}
section { padding-top: 5rem; padding-bottom: 5rem; }

/* ================= CUSTOM CURSOR ================= */
.cursor-dot, .cursor-outline { position: fixed; top: 0; left: 0; transform: translate(-50%, -50%); border-radius: 50%; pointer-events: none; z-index: 9999; }
.cursor-dot { width: 8px; height: 8px; background-color: var(--secondary-color); transition: transform 0.1s ease; }
.cursor-outline { width: 40px; height: 40px; border: 2px solid var(--secondary-color); transition: transform 0.2s ease, width 0.3s ease, height 0.3s ease; }
body:has(a:hover, button:hover, .btn-nav-resume:hover, .skill-card:hover) .cursor-outline { transform: scale(1.5); border-color: var(--primary-color); }

/* ================= ANIMATED BACKGROUND ================= */
.background-animation { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -1; overflow: hidden; }
.circle { position: absolute; border-radius: 50%; background: radial-gradient(circle, var(--primary-color), transparent 70%); opacity: 0.2; animation: move 20s infinite alternate; transition: opacity 0.4s ease; }
body.light-mode .circle { opacity: 0.08; }
.c1 { width: 400px; height: 400px; top: 10%; left: 5%; animation-duration: 25s; }
.c2 { width: 500px; height: 500px; top: 60%; left: 70%; animation-duration: 30s; }
.c3 { width: 300px; height: 300px; top: 30%; left: 40%; background: radial-gradient(circle, var(--secondary-color), transparent 70%); animation-duration: 20s; }
@keyframes move { from { transform: translate(0, 0) scale(1); } to { transform: translate(10vw, -15vh) scale(1.2); } }

/* ================= NAVBAR & THEME SWITCHER ================= */
#topNav { transition: all 0.4s ease; background: transparent; }
#topNav.scrolled { background: var(--nav-bg); backdrop-filter: blur(10px); border-bottom: 1px solid var(--card-border); }
.navbar-brand { font-weight: 600; font-size: 1.5rem; }
.navbar-brand .nav-typing-effect { color: var(--text-color); }
.nav-link { color: var(--text-muted-color); font-weight: 500; transition: color 0.3s ease; position: relative; }
.nav-link::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 0; height: 2px; background: var(--secondary-color); transition: width 0.3s ease; }
.nav-link:hover, .nav-link.active { color: var(--secondary-color); }
.nav-link:hover::after, .nav-link.active::after { width: 60%; }

.btn-nav-resume {
    padding: 0.5rem 1.2rem; border: 2px solid var(--secondary-color); color: var(--secondary-color); border-radius: 50px;
    font-weight: 500; text-decoration: none; transition: all 0.3s ease; background: transparent;
}
.btn-nav-resume:hover { background: var(--secondary-color); color: #fff; box-shadow: 0 0 15px var(--secondary-color); }
body.light-mode .btn-nav-resume:hover { color: white; }

.theme-switcher { display: flex; align-items: center; }
#theme-toggle { display: none; }
.theme-toggle-label {
    cursor: pointer; position: relative; width: 50px; height: 26px; background: #333;
    border-radius: 25px; display: flex; align-items: center; justify-content: space-between; padding: 5px;
}
.theme-toggle-label::before {
    content: ''; position: absolute; width: 20px; height: 20px; border-radius: 50%; background: white;
    left: 3px; transition: transform 0.3s ease;
}
#theme-toggle:checked + .theme-toggle-label::before { transform: translateX(24px); }
.theme-toggle-label i { font-size: 0.9rem; }
.bi-moon-stars-fill { color: #f1c40f; }
.bi-sun-fill { color: #f39c12; }

/* ================= HERO SECTION ================= */
.hero { min-height: 100vh; position: relative; }
.hero-img { width: 180px; height: 180px; border-radius: 50%; border: 5px solid var(--card-border); object-fit: cover; animation: float 4s ease-in-out infinite; }
.hero-title { font-weight: 700; font-size: 3.5rem; }
.hero-subtitle { font-size: 1.8rem; color: var(--text-muted-color); }
.hero-typing-effect { color: var(--secondary-color); font-weight: 600; }
.hero-summary { max-width: 600px; color: var(--text-muted-color); }
.hero-actions { display: flex; justify-content: center; align-items: center; gap: 1.5rem; }
.hero-socials { display: flex; gap: 1rem; }
.hero-socials a { font-size: 1.5rem; color: var(--text-muted-color); transition: color 0.3s ease, transform 0.3s ease; }
.hero-socials a:hover { color: var(--secondary-color); transform: translateY(-3px); }

.btn-primary-custom {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color)); color: white; border: none; padding: 12px 25px;
    border-radius: 50px; font-weight: 600; transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.btn-primary-custom:hover { transform: translateY(-3px); box-shadow: 0 10px 20px rgba(138, 43, 226, 0.3); }

.scroll-down-indicator { position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%); font-size: 2rem; color: var(--text-muted-color); animation: bounce 2s infinite; }
@keyframes bounce { 0%, 20%, 50%, 80%, 100% { transform: translate(-50%, 0); } 40% { transform: translate(-50%, -20px); } 60% { transform: translate(-50%, -10px); } }

/* ================= CARDS & INFO ================= */
.info-card, .timeline-content, .skill-card, .project-card, .cert-card {
    background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 15px;
    backdrop-filter: blur(10px); padding: 1.5rem; box-shadow: var(--card-shadow);
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.info-card ul li { margin-bottom: 1rem; font-size: 1.1rem; }
.info-card ul li i { color: var(--secondary-color); margin-right: 10px; }

/* ================= TIMELINE ================= */
.timeline { position: relative; margin-left: 20px; }
.timeline::before { content: ''; position: absolute; top: 0; left: -2px; height: 100%; width: 2px; background: var(--card-border); }
.timeline::after { content: ''; position: absolute; top: 0; left: -2px; height: 0; width: 2px; background: var(--secondary-color); animation: fill-timeline linear forwards; animation-timeline: view(); }
@keyframes fill-timeline { to { height: 100%; } }
.timeline-item { position: relative; margin-bottom: 2rem; padding-left: 40px; }
.timeline-marker { position: absolute; left: -11px; top: 5px; width: 20px; height: 20px; border-radius: 50%; background: var(--secondary-color); border: 3px solid var(--bg-color); transition: transform 0.3s ease, border-color 0.4s ease; }
.timeline-item:hover .timeline-marker { transform: scale(1.2); }
.timeline-item:hover .timeline-content { border-color: var(--secondary-color); transform: translateY(-3px); box-shadow: 0 5px 20px rgba(0, 209, 224, 0.1); }
body.light-mode .timeline-item:hover .timeline-content { box-shadow: var(--card-shadow); }
.timeline-date { color: var(--text-muted-color); font-size: 0.9rem; }
.timeline-title { font-weight: 600; color: var(--text-color); }
.timeline-subtitle { color: var(--secondary-color); }
.timeline-content ul { padding-left: 20px; }

/* ================= SKILLS SECTION ================= */
.skills-container { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; }
.skill-card { display: flex; flex-direction: column; align-items: center; justify-content: center; width: 130px; height: 120px; text-align: center; }
.skill-card:hover { border-color: var(--secondary-color); box-shadow: 0 5px 20px rgba(0, 209, 224, 0.1); }
body.light-mode .skill-card:hover { box-shadow: var(--card-shadow); }
.skill-card i { font-size: 3rem; margin-bottom: 0.5rem; }
.skill-card span { font-weight: 500; font-size: 0.9rem; }
i.devicon-hibernate-plain-wordmark.colored { color: #ac7902; } /* Hibernate Icon Fix */

/* ================= PROJECTS SECTION ================= */
.project-card { padding: 0; overflow: hidden; position: relative; display: flex; flex-direction: column; height: 100%; }
.project-card:hover { border-color: var(--primary-color); transform: translateY(-5px); box-shadow: 0 5px 20px rgba(138, 43, 226, 0.1); }
body.light-mode .project-card:hover { box-shadow: var(--card-shadow); }
.project-card img { width: 100%; height: 200px; object-fit: cover; transition: transform 0.4s ease; }
.project-card:hover img { transform: scale(1.05); }
.project-card-body { padding: 1.5rem; flex-grow: 1; }
.project-tech-stack { display: flex; gap: 0.75rem; font-size: 1.5rem; margin-top: auto; padding-top: 1rem; }
.project-links { background: rgba(12, 12, 20, 0.8); backdrop-filter: blur(5px); padding: 1rem 1.5rem; position: absolute; bottom: 0; left: 0; width: 100%; display: flex; gap: 1.5rem; transform: translateY(100%); transition: transform 0.4s ease; }
body.light-mode .project-links { background: rgba(255, 255, 255, 0.8); }
.project-card:hover .project-links { transform: translateY(0); }
.project-links a { text-decoration: none; color: var(--secondary-color); font-weight: 500; }
.project-links a:hover { color: var(--primary-color); }

/* ================= CERTIFICATES & CONTACT ================= */
.cert-card { text-decoration: none; display: block; color: var(--text-color); text-align: center; min-height: 100%; }
.cert-card:hover { border-color: var(--primary-color); transform: translateY(-5px); box-shadow: 0 5px 20px rgba(138, 43, 226, 0.1); }
body.light-mode .cert-card:hover { box-shadow: var(--card-shadow); }
.cert-card h5 { margin-bottom: 0.5rem; font-weight: 600; }
.cert-card p { color: var(--text-muted-color); }

footer { background: rgba(0,0,0,0.2); color: var(--text-muted-color); transition: background-color 0.4s ease; }
body.light-mode footer { background: #e9ecef; }

/* ================= ANIMATIONS & RESPONSIVENESS ================= */
@keyframes float { 0%, 100% { transform: translateY(0px); } 50% { transform: translateY(-15px); } }
.fade-in { opacity: 0; transform: translateY(40px); transition: opacity 0.8s ease, transform 0.8s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 991px) {
    .cursor-dot, .cursor-outline { display: none; }
    body { cursor: auto; }
}
@media (max-width: 768px) {
    .section-title { font-size: 2.2rem; }
    .hero-title { font-size: 2.5rem; }
    .hero-subtitle { font-size: 1.5rem; }
    .timeline { margin-left: 0; }
}