:root {
    --base-color: #faf9f8;
    --base-variant: #c2b9b6;
    --text-color: #333;
    --primary-color: #5c4c8a;
    --secondary-color: #b88fbd;
}

.darkmode {
  --base-color: #121212;
  --base-variant: #1f1f1f;
  --text-color: #eee;
  --primary-color: #b39ddb;
  --secondary-color: #d1b4f0;
}


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

body, header, main, aside, footer {
  transition: background-color 0.3s ease, color 0.3s ease;
}

body {
    background: var(--base-color);
    color: var(--text-color);
    font-size: 16px;
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

body.darkmode {
  background-color: #121212;
  color: #f2f2f2;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: bold;
    text-transform: capitalize;
}

/* Header */
header {
    position: sticky;
    top: 0;
    background: var(--base-color);
    z-index: 1000;
    border-bottom: 1px solid #ddd;
    padding: 10px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav a {
    display: flex;
    list-style-type: none;
    gap: 25px;
    font-weight: bold;
    font-size: 0.9rem;
    text-transform: uppercase;
}

.nav a.active,
.nav a:hover {
    color: var(--secondary-color);
    cursor: pointer;
}

header input[type="search"] {
    padding: 5px 10px;
    border: 1px solid var(--base-variant);
    border-radius: 18px;
    font-size: 0.9rem;
    width: 180px;
    margin-right: 15px;
}

header button.post-btn {
    background: var(--secondary-color);
    border: none;
    color: var(--base-color);
    padding: 6px 15px;
    font-weight: bold;
    border-radius: 35px;
    cursor: pointer;
    font-size: 0.9rem;
}

.post-btn svg {
    width: 100%;
    height: 20px;
}

header button.post-btn:hover {
    background: var(--secondary-color);
}

#theme-switcher {
    height: 100%;
    width: 40px;
    padding: 0;
    border-radius: 50%;
    background-color: var(--primary-color);
    display: flex;
    justify-content: center;
    align-items: center;
    top: 20px;
    right: 20px;
}

#theme-switcher svg {
    fill: var(--base-color);
}

#theme-switcher svg:last-child {
    display: none;
}

.darkmode #theme-switcher svg:first-child {
    display: none;
}

.darkmode #theme-switcher svg:last-child {
    display: block;
}

/* Banner Image */
.banner {
    width: 100%;
    height: 220px;
    background: url('img/banner.jpg') center/cover no-repeat;
    position: relative;
}

/* Container for sidebar + main content */
.container {
    display: flex;
    max-width: 1200px;
    margin: 20px auto;
    gap: 30px;
}

/* Sidebar */
aside.sidebar {
    flex: 1 1 280px;
    background: var(--base-variant);
    padding: 25px;
    border-radius: 8px;
    border: 1px solid var(--base-variant);
}

aside .profile-pic {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--secondary-color);
    margin: 0 auto 20px;
}

aside .profile-pic img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

aside h2.username {
    text-align: center;
    font-size: 1.7rem;
    font-weight: 900;
    margin-bottom: 5px;
}

aside p.handle {
    text-align: center;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 0.9rem;
}

aside .bio {
    font-size: 0.9rem;
    line-height: 1.4;
    margin-bottom: 20px;
}

aside .section-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 9px;
    border-bottom: 1px solid var(--base-variant);
    padding-bottom: 5px;
}

/* Friends list */
aside .friends,
aside .current-obs {
    list-style: none;
    padding-left: 0;
}

aside .friends li,
aside .current-obs li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    margin-bottom: 10px;
}

aside .friends li img {
    width: 30px;
    height: 30px;
    border-radius: 50%;
}

/* Main content */
main.content {
    flex: 2 1 700px;
    background: var(--base-color);
    padding: 25px;
    border-radius: 8px;
    border: 1px solid #eee;
    box-shadow: 1px 1px 18px var(--primary-color);
}

/* Tab navigation */
main .tabs {
    display: flex;
    gap: 25px;
    margin-bottom: 25px;
    border-bottom: 1px solid #ddd;
    transition: all 0.2s ease-in-out;
}

main .tabs button {
    background: none;
    border: none;
    font-weight: 700;
    font-size: 1rem;
    padding: 10px 0;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    color: var(--secondary-color);
}

main .tabs button.active, button:hover {
    border-color: var(--secondary-color);
    color: var(--primary-color);
}

/* About me section */
.about-me {
    font-size: 0.9rem;
    line-height: 1.4;
    color: var(--text-color);
}

.about-me h3 {
    font-weight: 900;
    font-size: 1.1rem;
    margin-bottom: 12px;
}

.about-me p {
    color: var(--secondary-color);
    font-weight: 700;
    letter-spacing: 1.2px;
    margin-bottom: 15px;
}

.about-me small {
    font-size: 0.85rem;
    color: #555;
    white-space: pre-line;
}

.about-me img {
    float: right;
    width: 110px;
    margin-left: 15px;
    margin-bottom: 10px;
    border-radius: 10px;
}

/* Posts */
.post {
    border-top: 1px solid #eee;
    padding-top: 15px;
    margin-top: 15px;
}

.post-header {
    display: flex;
    gap: 15px;
    align-items: center;
    margin-bottom: 8px;
}

.post-time {
    font-size: 0.8rem;
    color: var(--secondary-color);
}

.post-img {
    width: 80px;
    border-radius: 6px;
}

.post-info {
    flex-grow: 1;
}

.post-title {
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 4px;
}

.post-tags {
    font-size: 0.85rem;
    color: var(--secondary-color);
    margin-bottom: 6px;
}

.post-data div {
    font-size: 0.85rem;
    color: var(--secondary-color);
}

/* Footer */
footer {
    font-size: 0.75rem;
    color: var(--primary-color);
    text-align: center;
    margin: 30px 0 15px;
    background: var(--base-color);
    padding: 10px;
    border-top: 1px solid var(--base-variant);
}

main.content::-webkit-scrollbar {
    width: 7px;
}

main.content::-webkit-scrollbar-thumb {
    background: var(--secondary-color);
    border-radius: 10px;
}

@media (max-width: 768px) {
  .container {
    flex-direction: column;
    padding: 0 15px;
  }

  aside.sidebar {
    width: 100%;
  }

  main.content {
    width: 100%;
  }

  header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  header input[type="search"] {
    width: 100%;
  }
}