:root {
    --bg-color: #111111;
    --text-color: #e0e0e0;
    --card-bg: #1c1c1c;
    --card-shadow: rgba(0, 0, 0, 0.5);
    --border-color: #333;
    --transition-speed: 0.5s;
    --primary-accent: #0A66C2;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
    padding-top: 80px; /* Space for nav */
    min-height: 100vh;
}

/* --- Navigation --- */
.main-nav {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--card-bg);
    padding: 10px 20px;
    border-radius: 50px;
    box-shadow: 0 5px 15px var(--card-shadow);
    z-index: 1000;
    display: flex;
    gap: 15px;
}
.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 50px;
    transition: background-color 0.3s, color 0.3s;
    opacity: 0.7;
}
.nav-link.active, .nav-link:hover {
    background-color: var(--primary-accent);
    color: #fff;
    opacity: 1;
}

/* --- Header & Intro --- */
.header {
    text-align: center;
    margin-bottom: 3rem;
    max-width: 800px;
}
.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
}
.header p {
    font-size: 1.1rem;
    opacity: 0.7;
    margin-top: 0.5rem;
    line-height: 1.6;
}

/* --- Card Stack (Home Page) --- */
.card-stack {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 400px;
    perspective: 2000px;
}

@keyframes card-entry {
    from { opacity: 0; transform: translateY(50px) rotateX(-20deg); }
    to { opacity: 1; transform: translateY(0) rotateX(0deg); }
}

.card-container {
    width: 100%;
    max-width: 360px;
    min-height: 220px;
    opacity: 0;
    animation: card-entry 0.8s ease-out forwards;
    transition: transform 0.4s ease, margin-top 0.4s ease;
}
.card-container:not(:first-child) { margin-top: -160px; }
.card-container:hover { transform: translateY(-15px) scale(1.02); z-index: 10; }
.card-container:hover + .card-container { margin-top: -140px; }
.card-container:nth-child(1) { animation-delay: 0.1s; z-index: 4; }
.card-container:nth-child(2) { animation-delay: 0.2s; z-index: 3; }
.card-container:nth-child(3) { animation-delay: 0.3s; z-index: 2; }
.card-container:nth-child(4) { animation-delay: 0.4s; z-index: 1; }

.card {
    width: 100%;
    height: 220px;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.8s cubic-bezier(0.25, 0.8, 0.25, 1);
    cursor: pointer;
    border-radius: 18px;
    box-shadow: 0 10px 30px var(--card-shadow);
}
.card.is-flipped { transform: rotateY(180deg); }
.card-face {
    position: absolute; width: 100%; height: 100%;
    backface-visibility: hidden;
    border-radius: 18px; overflow: hidden;
    display: flex; flex-direction: column;
    justify-content: space-between; padding: 25px;
    font-family: 'Inter', sans-serif;
}
.card-front { z-index: 2; }
.card-back { transform: rotateY(180deg); }

/* Card Specific Styles */
.card.main-card .card-front { background: linear-gradient(135deg, #2d2d2d, #1c1c1c); color: #fff; align-items: flex-start; }
.main-card .card-front h3 { font-size: 1.4em; font-weight: 500; }
.main-card .card-front p { font-size: 0.8em; letter-spacing: 2px; text-transform: uppercase; opacity: 0.7; }
.main-card .card-back { background: #222; color: #ccc; display: flex; justify-content: center; align-items: center; }
.card.behance-card { background: #053eff; color: #fff; }
.behance-card .card-front, .behance-card .card-back { background: linear-gradient(135deg, #1358d4, #053eff); }
.card.linkedin-card { background: #0A66C2; color: #fff; }
.linkedin-card .card-front, .linkedin-card .card-back { background: linear-gradient(135deg, #0a73da, #0A66C2); }
.card.instagram-card { background: #d6249f; color: #fff; }
.instagram-card .card-front, .instagram-card .card-back { background: linear-gradient(45deg, #f09433 0%,#e6683c 25%,#dc2743 50%,#cc2366 75%,#bc1888 100%); }
.card-front .card-icon { font-size: 2.5rem; align-self: flex-end; }
.card-front .card-title { font-size: 1.5rem; font-weight: 500; }
.card-back { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 15px; }
.card-back .stats { text-align: center; }
.card-back h4 { font-size: 2rem; font-weight: 700; }
.card-back p { font-size: 0.9rem; opacity: 0.8; margin-top: -5px; }
.card-back .btn { text-decoration: none; color: inherit; background: rgba(255, 255, 255, 0.2); padding: 10px 20px; border-radius: 50px; font-weight: 500; transition: background 0.3s; }
.card-back .btn:hover { background: rgba(255, 255, 255, 0.4); }
.detail-item { font-size: 0.9em; cursor: copy; display: flex; align-items: center; gap: 10px; margin-bottom: 5px; }

/* --- Experience Page - NEW UI --- */
.experience-grid {
    width: 100%;
    max-width: 1000px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@keyframes card-fade-in {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.experience-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 18px;
    box-shadow: 0 10px 30px var(--card-shadow);
    transition: background-color var(--transition-speed) ease;
    opacity: 0;
    animation: card-fade-in 0.6s ease-out forwards;
}
.experience-card:nth-child(1) { animation-delay: 0.1s; }
.experience-card:nth-child(2) { animation-delay: 0.2s; }
.experience-card:nth-child(3) { animation-delay: 0.3s; }


.experience-card h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}
.large-card { min-height: 250px; }
.full-width-card { grid-column: 1 / -1; }

/* Metrics Card */
.metrics-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    text-align: center;
}
.metric-item i {
    font-size: 1.8rem;
    color: var(--primary-accent);
    margin-bottom: 0.5rem;
}
.metric-item h3 {
    font-size: 2rem;
    font-weight: 700;
}
.metric-item p {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* Career Card */
.timeline {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}
.timeline-entry {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.timeline-icon {
    background-color: var(--primary-accent);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-size: 1.2rem;
}
.timeline-details h4 {
    font-size: 1.1rem;
    font-weight: 500;
}
.timeline-details span {
    font-size: 0.9rem;
    opacity: 0.6;
}

/* Skills Card */
.skills-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}
.skill-tag {
    background-color: var(--bg-color);
    padding: 10px 20px;
    border-radius: 50px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background-color 0.3s, color 0.3s;
}
.skill-tag:hover {
    background-color: var(--primary-accent);
    color: #fff;
}
.skill-tag i {
    opacity: 0.8;
}

/* --- Popup Modal --- */
.popup {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.7); backdrop-filter: blur(10px);
    z-index: 100; display: flex; justify-content: center; align-items: center;
    opacity: 0; visibility: hidden; transition: opacity 0.4s, visibility 0.4s;
}
.popup.active { opacity: 1; visibility: visible; }
.popup-content {
    width: 400px; max-width: 90vw; height: 250px;
    transform: scale(0.8);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.popup.active .popup-content { transform: scale(1); }

/* --- Notification --- */
.notification {
    position: fixed; bottom: -100px; left: 50%;
    transform: translateX(-50%);
    background-color: #1abc9c; color: white;
    padding: 15px 30px; border-radius: 8px;
    z-index: 1000; transition: bottom 0.5s ease-in-out;
}
.notification.show { bottom: 30px; }

/* Responsive Adjustments */
@media (max-width: 768px) {
    body { padding: 1rem; padding-top: 100px; }
    .header h1 { font-size: 2rem; }
    .main-nav { top: 10px; }
    .experience-grid { grid-template-columns: 1fr; }
}