* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #f3f4f6;
    padding: 20px;
    transition: background 0.4s;
}

.card {
    width: 100%;
    max-width: 360px;
    padding: 40px 28px;
    background: white;
    text-align: center;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    border-radius: 28px;
    transition: all 0.4s ease;
    position: relative;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
}

.toggle-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 26px;
    cursor: pointer;
    width: 45px;
    height: 45px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    transition: 0.3s;
}

.toggle-btn:hover {
    background: #f1f1f1;
}

/* Dark Mode */
body.dark-mode {
    background: #1f2937;
}

.card.dark-mode {
    background: #111827;
    color: #f1f5f9;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
}

.card.dark-mode h2 {
    color: #f1f5f9;
}

.card.dark-mode p {
    color: #9ca3af;
}

.card.dark-mode .skill {
    background: #334155;
    color: #60a5fa;
}

.card.dark-mode .btn-primary {
    background: #3b82f6;
}

.card.dark-mode .btn-secondary {
    background: #475569;
    color: #e2e8f0;
}

.card.dark-mode .like-btn {
    background: #f87171;
}

.card.dark-mode img {
    border-color: #475569;
}

img {
    border-radius: 50%;
    height: 140px;
    width: 140px;
    border: 5px solid #e0f2fe;
    object-fit: cover;
    margin-bottom: 20px;
}

h2 {
    margin-bottom: 10px;
    color: #1f2937;
}

p {
    font-size: 15px;
    color: #6b7280;
    line-height: 1.6;
    margin-bottom: 24px;
}

.skills {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 28px;
}

.skill {
    background: #e0f2fe;
    color: #0369a1;
    padding: 8px 16px;
    border-radius: 9999px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: 0.3s;
}

.skill:hover {
    transform: scale(1.05);
}

.buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

@media (min-width: 480px) {
    .buttons {
        flex-direction: row;
        justify-content: center;
    }

    .buttons button {
        flex: 1;
        max-width: 170px;
    }
}

button {
    padding: 14px 20px;
    border: none;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: #2563eb;
    color: white;
}

.btn-secondary {
    background: #e5e7eb;
    color: #374151;
}

.like-btn {
    background: #ef4444;
    color: white;
}

button:hover {
    transform: translateY(-3px);
}

.btn-primary:hover {
    background: #1d4ed8;
}