/* ============================================================
   BHIATECH — Digital Visiting Card Stylesheet
   3D Flip Card with Glassmorphism & Particle Effects
   ============================================================ */
:root {
    --bg: #060111;
    --accent: #b32dfd;
    --accent-2: #4b6be0;
    --gradient: linear-gradient(135deg, #b32dfd 0%, #4b6be0 100%);
    --glass: rgba(14, 6, 32, 0.7);
    --glass-border: rgba(179, 45, 253, 0.2);
    --text: #fff;
    --text-2: #b8b8d0;
    --text-3: #6b6b80;
    --radius: 24px;
    --font: 'Inter', sans-serif;
    --font-d: 'Space Grotesk', sans-serif;
}

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

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

#particleCanvas {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

.vcard-container {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 20px;
    width: 100%;
    max-width: 440px;
}

/* ===== 3D CARD ===== */
.card-3d-wrapper {
    width: 100%;
    max-width: 420px;
    aspect-ratio: 3 / 5;
    perspective: 1200px;
    cursor: grab;
}

.card-3d-inner {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-3d-inner.flipped {
    transform: rotateY(180deg);
}

.card-face {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.card-back {
    transform: rotateY(180deg);
}

/* Card Glow */
.card-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent 0%, var(--accent) 10%, transparent 20%, var(--accent-2) 30%, transparent 40%);
    animation: rotateGlow 6s linear infinite;
    opacity: 0.08;
}
@keyframes rotateGlow { to { transform: rotate(360deg); } }

/* Card Pattern */
.card-pattern {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 25% 25%, rgba(179,45,253,.06) 0, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(75,107,224,.06) 0, transparent 50%);
    pointer-events: none;
}

/* ===== FRONT FACE ===== */
.card-front-content {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 32px 28px;
    text-align: center;
}

.card-logo {
    font-family: var(--font-d);
    font-size: 1.1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 4px;
    margin-bottom: 24px;
    opacity: 0.7;
}
.card-logo .logo-icon {
    width: 28px;
    height: 28px;
    background: var(--gradient);
    color: #fff;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 800;
}

/* Avatar — 2x2 inch size (192x192px at 96dpi) */
.card-avatar {
    width: 200px;
    height: 200px;
    border-radius: 20px;
    position: relative;
    margin-bottom: 20px;
}

.avatar-ring {
    position: absolute;
    inset: -4px;
    border-radius: 20px;
    background: var(--gradient);
    animation: pulse-ring 2s ease-in-out infinite;
}
@keyframes pulse-ring {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}

.avatar-placeholder {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: 20px;
    background: linear-gradient(135deg, #1a0a2e, #0e0620);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.8rem;
    color: var(--accent);
    overflow: hidden;
}
.avatar-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 20px;
}

.card-name {
    font-family: var(--font-d);
    font-size: 1.65rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 6px;
    background: linear-gradient(135deg, #fff 30%, var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.card-title {
    font-size: 0.88rem;
    color: var(--text-2);
    font-weight: 500;
    margin-bottom: 20px;
}

.card-divider {
    width: 60px;
    height: 3px;
    background: var(--gradient);
    border-radius: 100px;
    margin-bottom: 20px;
}

.card-quick-info {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 100%;
    margin-bottom: 20px;
}

.quick-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    border-radius: 12px;
    background: rgba(179,45,253,0.06);
    border: 1px solid rgba(179,45,253,0.1);
    font-size: 0.85rem;
    color: var(--text-2);
    transition: all 0.3s ease;
    text-decoration: none;
}
.quick-item:hover {
    background: rgba(179,45,253,0.12);
    border-color: rgba(179,45,253,0.3);
    color: #fff;
}
.quick-item i {
    color: var(--accent);
    width: 16px;
    text-align: center;
}

.flip-btn {
    padding: 10px 24px;
    border-radius: 100px;
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-2);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: inherit;
}
.flip-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(179,45,253,0.08);
}

/* ===== BACK FACE ===== */
.card-back-content {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    flex-direction: column;
    padding: 32px 28px;
    overflow-y: auto;
}

.back-title {
    font-family: var(--font-d);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.back-about {
    font-size: 0.88rem;
    color: var(--text-2);
    line-height: 1.7;
    margin-bottom: 20px;
}

.back-address {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 16px;
    background: rgba(179,45,253,0.06);
    border: 1px solid rgba(179,45,253,0.1);
    border-radius: 12px;
    font-size: 0.85rem;
    color: var(--text-2);
    margin-bottom: 20px;
}
.back-address i {
    color: var(--accent);
    margin-top: 2px;
}

.skills-title {
    font-family: var(--font-d);
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.skill-tag {
    padding: 6px 14px;
    background: rgba(179,45,253,0.08);
    border: 1px solid rgba(179,45,253,0.15);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    transition: all 0.3s ease;
}
.skill-tag:hover {
    background: rgba(179,45,253,0.2);
    transform: translateY(-1px);
}

.social-links {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.social-icon {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(179,45,253,0.08);
    border: 1px solid rgba(179,45,253,0.15);
    color: var(--text-2);
    font-size: 1rem;
    transition: all 0.3s ease;
    text-decoration: none;
}
.social-icon:hover {
    background: var(--gradient);
    color: #fff;
    border-color: transparent;
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 8px 20px rgba(179,45,253,0.3);
}

/* ===== ACTION BUTTONS ===== */
.card-actions {
    display: flex;
    gap: 12px;
    margin-top: 32px;
    flex-wrap: wrap;
    justify-content: center;
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: 100px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    color: var(--text-2);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    font-family: inherit;
    backdrop-filter: blur(12px);
}
.action-btn:hover {
    background: rgba(179,45,253,0.15);
    border-color: var(--accent);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(179,45,253,0.2);
}
.action-btn i { font-size: 1rem; }

.vcard-footer {
    margin-top: 32px;
    font-size: 0.78rem;
    color: var(--text-3);
    text-align: center;
}
.vcard-footer a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
}

/* ===== 3D TILT HOVER ===== */
.card-3d-wrapper:hover .card-3d-inner {
    /* Tilt applied via JS */
}

/* ===== ENTRANCE ANIMATION ===== */
@keyframes cardEntrance {
    from {
        opacity: 0;
        transform: translateY(40px) rotateX(10deg);
    }
    to {
        opacity: 1;
        transform: translateY(0) rotateX(0);
    }
}

.card-3d-wrapper {
    animation: cardEntrance 1s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.card-actions {
    animation: cardEntrance 1s cubic-bezier(0.4, 0, 0.2, 1) 0.3s both;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 480px) {
    .vcard-container { padding: 24px 16px; }
    .card-3d-wrapper { max-width: 360px; }
    .card-front-content, .card-back-content { padding: 24px 20px; }
    .card-name { font-size: 1.4rem; }
    .card-actions { gap: 8px; }
    .action-btn { padding: 10px 16px; font-size: 0.78rem; }
    .action-btn span { display: none; }
    .action-btn { padding: 12px; border-radius: 50%; }
}

@media (prefers-reduced-motion: reduce) {
    .card-3d-inner { transition: none; }
    .card-glow { animation: none; }
    .avatar-ring { animation: none; }
    .card-3d-wrapper, .card-actions { animation: none; }
}