* {
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: Arial;
}

body {
background: linear-gradient(135deg, #667eea, #764ba2);
color: white;
}

/* HEADER */
header {
text-align: center;
padding: 20px;
background: rgba(0,0,0,0.3);
}

/* LAYOUT */
.container {
display: flex;
}

/* SIDEBAR */
.sidebar {
width: 220px;
height: 100vh;
background: rgba(0,0,0,0.4);
padding: 15px;
display: flex;
flex-direction: column;
gap: 10px;
}

.sidebar button {
padding: 10px;
border-radius: 8px;
background: white;
color: black;
font-weight: bold;
cursor: pointer;
}

.sidebar button:hover {
background: #ddd;
}

/* MAIN */
.main-content {
flex: 1;
padding: 20px;
}

/* SECTION */
.section {
display: none;
}

/* CARD */
.card {
background: rgba(255,255,255,0.15);
padding: 20px;
border-radius: 15px;
margin-bottom: 20px;
}

/* GRID */
.exercise-grid {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
gap: 15px;
}

/* BOX */
.box {
padding: 15px;
background: rgba(0,0,0,0.25);
border-radius: 12px;
display: flex;
flex-direction: column;
gap: 10px;
}

/* INPUT */
input {
padding: 8px;
border-radius: 6px;
border: none;
}

/* BUTTON */
button {
padding: 10px;
border-radius: 8px;
border: none;
cursor: pointer;
font-weight: bold;
transition: 0.3s;
}

button:hover {
transform: scale(1.05);
}

/* IMAGE */
.img {
width: 120px;
border-radius: 10px;
}
/* PROFILE LAYOUT */
.profile-container {
display: flex;
justify-content: space-between;
align-items: center;
gap: 20px;
flex-wrap: wrap; /* responsive */
}

/* LEFT SIDE TEXT */
.profile-info {
flex: 1;
}

/* RIGHT SIDE IMAGE */
.profile-image {
flex: 1;
display: flex;
justify-content: flex-end;
}

/* IMAGE STYLE */
.profile-img {
width: 150px;
border-radius: 50%;
box-shadow: 0 0 10px rgba(0,0,0,0.5);
}

/* DARK MODE */
.dark-mode {
background: #111 !important;
color: white;
}

/* FOOTER */
footer {
text-align: center;
padding: 15px;
background: rgba(0,0,0,0.4);
border-top: 2px solid rgba(255,255,255,0.3);
margin-top: 20px;
}