/* ---- shazbook styles ---- */

:root {
   --blue:       #1877f2;
   --blue-dark:  #166fe5;
   --blue-light: #e7f0fd;
   --bg:         #f0f2f5;
   --card:       #ffffff;
   --text:       #050505;
   --text-mid:   #444;
   --text-light: #65676b;
   --border:     #dddfe2;
   --red:        #e4405f;
   --green:      #42b72a;
   --radius:     8px;
   --shadow:     0 1px 2px rgba(0,0,0,.12);
}

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

body {
   font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI',
                Roboto, Helvetica, Arial, sans-serif;
   font-size: 15px;
   background: var(--bg);
   color: var(--text);
   min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }
img { display: block; max-width: 100%; }
textarea, input { font-family: inherit; font-size: inherit; }
.hidden { display: none !important; }

/* ---- Navbar ---- */
.navbar {
   position: sticky;
   top: 0;
   z-index: 100;
   background: var(--blue);
   color: #fff;
   display: flex;
   align-items: center;
   padding: 0 1rem;
   height: 56px;
   box-shadow: 0 2px 4px rgba(0,0,0,.2);
   gap: 1.5rem;
}

.nav-logo {
   font-size: 1.5rem;
   font-weight: 800;
   letter-spacing: -1px;
   color: #fff;
   text-decoration: none;
   flex-shrink: 0;
   display: flex;
   align-items: center;
}
.nav-logo img {
   height: 36px;
   width: auto;
}

.nav-links {
   display: flex;
   gap: .5rem;
   flex: 1;
   justify-content: center;
}

.nav-link {
   color: rgba(255,255,255,.85);
   padding: .4rem .8rem;
   border-radius: 6px;
   font-size: .9rem;
   font-weight: 500;
   text-decoration: none;
   transition: background .15s;
}
.nav-link:hover,
.nav-link.active { background: rgba(255,255,255,.2); }

.nav-user {
   display: flex;
   align-items: center;
   gap: .75rem;
   flex-shrink: 0;
}

.nav-avatar-link {
   display: flex;
   align-items: center;
   gap: .5rem;
   color: #fff;
   text-decoration: none;
   font-size: .9rem;
}
.nav-avatar-link:hover { text-decoration: none; opacity: .9; }

.nav-avatar {
   width: 32px;
   height: 32px;
   border-radius: 50%;
   object-fit: cover;
   border: 2px solid rgba(255,255,255,.4);
}

.nav-logout {
   font-size: .85rem;
   opacity: .8;
}

/* ---- Main layout ---- */
.main {
   max-width: 680px;
   margin: 0 auto;
   padding: 1.25rem 1rem 3rem;
}

/* ---- Alerts ---- */
.alert {
   padding: .75rem 1rem;
   border-radius: var(--radius);
   margin-bottom: 1rem;
   font-size: .9rem;
}
.alert-error   { background: #fde8ec; color: #c0392b; border: 1px solid #f5c6cb; }
.alert-success { background: #e8f5e9; color: #2e7d32; border: 1px solid #c8e6c9; }

/* ---- Card ---- */
.card {
   background: var(--card);
   border-radius: var(--radius);
   box-shadow: var(--shadow);
   margin-bottom: 1rem;
   overflow: hidden;
}

/* ---- Composer ---- */
.composer { padding: 1rem; }

.composer-top {
   display: flex;
   align-items: center;
   gap: .75rem;
   margin-bottom: .5rem;
}

.composer-trigger {
   flex: 1;
   text-align: left;
   background: var(--bg);
   border: 1px solid var(--border);
   border-radius: 20px;
   padding: .6rem 1rem;
   color: var(--text-light);
   cursor: pointer;
   font-size: .95rem;
   transition: background .15s;
}
.composer-trigger:hover { background: #e4e6ea; }

.composer-form { margin-top: .75rem; }
.composer-form textarea {
   width: 100%;
   border: 1px solid var(--border);
   border-radius: var(--radius);
   padding: .75rem;
   resize: vertical;
   min-height: 80px;
   background: var(--bg);
   color: var(--text);
   outline: none;
}
.composer-form textarea:focus { border-color: var(--blue); }

.composer-footer {
   display: flex;
   align-items: center;
   gap: .5rem;
   margin-top: .75rem;
   flex-wrap: wrap;
}
.composer-footer .btn-primary { margin-left: auto; }

.img-preview {
   max-height: 80px;
   border-radius: 4px;
   object-fit: cover;
}

/* ---- Post card ---- */
.post { padding: 0; }

.post-header {
   display: flex;
   align-items: center;
   gap: .75rem;
   padding: .9rem 1rem .5rem;
}

.post-meta {
   flex: 1;
   display: flex;
   flex-direction: column;
}

.post-author {
   font-weight: 600;
   font-size: .95rem;
   color: var(--text);
}
.post-author:hover { text-decoration: underline; }

.post-time {
   font-size: .78rem;
   color: var(--text-light);
   margin-top: 1px;
}

.post-delete button { background: none; border: none; cursor: pointer;
   font-size: 1rem; opacity: .5; padding: .25rem; }
.post-delete button:hover { opacity: 1; }

.post-body {
   padding: .25rem 1rem .75rem;
   line-height: 1.55;
   white-space: pre-wrap;
   word-break: break-word;
}

.post-image img {
   width: 100%;
   max-height: 500px;
   object-fit: cover;
}

.post-actions {
   padding: .5rem 1rem .75rem;
   border-top: 1px solid var(--border);
   margin-top: .25rem;
}

.btn-like {
   background: none;
   border: none;
   cursor: pointer;
   font-size: .9rem;
   color: var(--text-light);
   padding: .35rem .6rem;
   border-radius: 6px;
   display: inline-flex;
   align-items: center;
   gap: .35rem;
   transition: background .15s, color .15s;
}
.btn-like:hover { background: var(--blue-light); color: var(--blue); }
.btn-like.liked  { color: var(--red); }

.like-wrap {
   position: relative;
   display: inline-block;
}
.like-tooltip {
   position: absolute;
   bottom: calc(100% + 6px);
   left: 50%;
   transform: translateX(-50%);
   background: #333;
   color: #fff;
   font-size: .78rem;
   padding: .3rem .55rem;
   border-radius: 5px;
   white-space: pre;
   pointer-events: none;
   z-index: 10;
}
.like-tooltip::after {
   content: '';
   position: absolute;
   top: 100%;
   left: 50%;
   transform: translateX(-50%);
   border: 5px solid transparent;
   border-top-color: #333;
}

/* ---- Comments ---- */
.comments {
   border-top: 1px solid var(--border);
   padding: .5rem 1rem 0;
   display: flex;
   flex-direction: column;
   gap: .5rem;
}
.comment {
   display: flex;
   align-items: flex-start;
   gap: .5rem;
}
.comment-content {
   background: var(--bg);
   border-radius: 12px;
   padding: .4rem .7rem;
   flex: 1;
   min-width: 0;
}
.comment-author {
   font-weight: 600;
   font-size: .85rem;
   display: block;
}
.comment-body {
   font-size: .9rem;
   margin: .15rem 0;
   word-break: break-word;
}
.comment-image {
   max-width: 200px;
   border-radius: 8px;
   margin-top: .3rem;
   display: block;
}
.comment-time {
   font-size: .75rem;
   color: var(--text-light);
   margin-top: .2rem;
   display: block;
}
.comment-compose {
   display: flex;
   align-items: flex-start;
   gap: .5rem;
   padding: .5rem 0 .6rem;
}
.comment-form { flex: 1; }
.comment-input-wrap {
   display: flex;
   align-items: center;
   background: var(--bg);
   border-radius: 20px;
   padding: .3rem .5rem .3rem .8rem;
   gap: .4rem;
}
.comment-input-wrap textarea {
   flex: 1;
   border: none;
   background: none;
   resize: none;
   font-size: .9rem;
   font-family: inherit;
   outline: none;
   max-height: 120px;
}
.comment-form-actions {
   display: flex;
   align-items: center;
   gap: .3rem;
   flex-shrink: 0;
}
.comment-img-preview {
   max-width: 120px;
   border-radius: 6px;
   margin-top: .35rem;
   display: block;
}

/* ---- Avatars ---- */
.avatar-xs {
   width: 28px; height: 28px;
   border-radius: 50%; object-fit: cover; flex-shrink: 0;
}
.avatar-sm {
   width: 40px; height: 40px;
   border-radius: 50%; object-fit: cover; flex-shrink: 0;
}
.avatar-md {
   width: 56px; height: 56px;
   border-radius: 50%; object-fit: cover; flex-shrink: 0;
}
.avatar-lg {
   width: 100px; height: 100px;
   border-radius: 50%; object-fit: cover;
}

/* ---- Buttons ---- */
.btn {
   display: inline-block;
   padding: .5rem 1.1rem;
   border-radius: 6px;
   font-size: .9rem;
   font-weight: 600;
   cursor: pointer;
   border: 2px solid transparent;
   text-align: center;
   text-decoration: none;
   transition: background .15s, opacity .15s;
   line-height: 1.3;
}
.btn-primary {
   background: var(--blue);
   color: #fff;
   border-color: var(--blue);
}
.btn-primary:hover { background: var(--blue-dark);
   border-color: var(--blue-dark); }

.btn-outline {
   background: transparent;
   border-color: var(--border);
   color: var(--text-mid);
}
.btn-outline:hover { background: var(--bg); }

.btn-sm { padding: .35rem .8rem; font-size: .82rem; }
.btn-google {
   display: flex; align-items: center; justify-content: center;
   gap: .6rem; background: #fff; color: var(--text);
   border: 1px solid var(--border); border-radius: 6px;
   padding: .7rem 1.2rem; font-size: 1rem; font-weight: 500;
   cursor: pointer; width: 100%;
   transition: box-shadow .15s;
}
.btn-google:hover { box-shadow: 0 2px 8px rgba(0,0,0,.15); }
.btn-google svg { flex-shrink: 0; }

.btn-icon {
   background: none; border: none; cursor: pointer; padding: .25rem;
}

.disabled { opacity: .6; pointer-events: none; }

/* ---- Login page ---- */
.login-page { background: var(--bg); }

.login-wrap {
   min-height: 100vh;
   display: flex;
   align-items: center;
   justify-content: center;
   gap: 2.5rem;
   padding: 2rem;
   flex-wrap: wrap;
}

.login-logo {
   height: 80px;
   width: auto;
}
.login-brand h1 {
   font-size: 3rem;
   font-weight: 800;
   color: var(--blue);
   letter-spacing: -2px;
   margin-top: .25rem;
}
.login-brand p {
   font-size: 1.15rem;
   color: var(--text-mid);
   margin-top: .5rem;
   max-width: 320px;
}

.login-card {
   background: var(--card);
   border-radius: var(--radius);
   box-shadow: 0 2px 16px rgba(0,0,0,.12);
   padding: 2rem;
   width: 100%;
   max-width: 360px;
}
.login-card h2 {
   font-size: 1.4rem;
   margin-bottom: 1.25rem;
   color: var(--text);
}
.login-note {
   margin-top: 1rem;
   font-size: .78rem;
   color: var(--text-light);
   text-align: center;
}

/* ---- Profile page ---- */
.profile-wrap { }

.profile-header { padding: 0; }
.profile-cover {
   height: 200px;
   background: linear-gradient(135deg, #1877f2 0%, #42b0ff 100%);
}
.profile-info {
   display: flex;
   align-items: flex-end;
   gap: 1rem;
   padding: 0 1.25rem 1.25rem;
   flex-wrap: wrap;
   position: relative;
}
.profile-avatar {
   width: 120px; height: 120px;
   border-radius: 50%; object-fit: cover;
   border: 4px solid #fff;
   margin-top: -60px;
   flex-shrink: 0;
   box-shadow: 0 2px 8px rgba(0,0,0,.2);
}
.profile-details { flex: 1; padding-top: .5rem; }
.profile-details h2 { font-size: 1.4rem; }
.profile-bio { color: var(--text-mid); margin-top: .3rem;
   font-size: .9rem; max-width: 400px; }
.profile-stat { font-size: .85rem; color: var(--text-light);
   margin-top: .3rem; display: block; }
.profile-actions { display: flex; gap: .5rem; flex-wrap: wrap;
   padding-top: .5rem; }

.profile-columns {
   display: grid;
   grid-template-columns: 260px 1fr;
   gap: 1rem;
   align-items: start;
}
@media (max-width: 640px) {
   .profile-columns { grid-template-columns: 1fr; }
}

.profile-friends-card { padding: 1rem; }
.profile-friends-card h3 { margin-bottom: .75rem; }
.friend-grid {
   display: grid;
   grid-template-columns: repeat(3, 1fr);
   gap: .5rem;
}
.friend-thumb {
   display: flex; flex-direction: column; align-items: center;
   gap: .25rem; text-decoration: none;
}
.friend-thumb img {
   width: 72px; height: 72px;
   border-radius: var(--radius); object-fit: cover;
}
.friend-thumb span {
   font-size: .75rem; color: var(--text-mid);
   text-align: center; white-space: nowrap;
   overflow: hidden; text-overflow: ellipsis; max-width: 72px;
}
.friend-thumb:hover span { text-decoration: underline; }

.profile-posts { }

.profile-avatar-preview {
   width: 100px; height: 100px;
   border-radius: 50%; object-fit: cover;
   display: block; margin-bottom: .75rem;
   border: 3px solid var(--border);
}
.avatar-upload-group {
   display: flex; flex-direction: column; gap: .4rem;
   margin-bottom: 1.25rem;
}

/* ---- Friends page ---- */
.section-title {
   padding: 1rem 1rem .5rem;
   font-size: 1.05rem;
   color: var(--text);
}
.empty-msg { padding: 0 1rem 1rem; color: var(--text-light);
   font-size: .9rem; }

.people-list { padding: .5rem 1rem 1rem; display: flex;
   flex-direction: column; gap: .75rem; }

.person-card {
   display: flex;
   align-items: center;
   gap: .75rem;
   padding: .5rem;
   border-radius: var(--radius);
   transition: background .15s;
}
.person-card:hover { background: var(--bg); }
.person-info { flex: 1; }
.person-name { font-weight: 600; font-size: .9rem;
   color: var(--text); }
.person-name:hover { text-decoration: underline; }
.person-meta { font-size: .8rem; color: var(--text-light); }
.person-actions { display: flex; gap: .4rem; flex-wrap: wrap; }

/* ---- Form elements ---- */
.form-group { margin-bottom: 1.1rem; }
.form-group label {
   display: block; font-size: .85rem;
   font-weight: 600; margin-bottom: .3rem;
   color: var(--text-mid);
}
.form-input {
   width: 100%; padding: .6rem .8rem;
   border: 1px solid var(--border); border-radius: 6px;
   background: var(--bg); color: var(--text);
   outline: none; transition: border-color .15s;
}
.form-input:focus { border-color: var(--blue); }
textarea.form-input { resize: vertical; }

.form-actions { display: flex; gap: .75rem; margin-top: 1.25rem; }

/* ---- Empty state ---- */
.empty-state { padding: 2rem; text-align: center;
   color: var(--text-light); }

/* ---- Feed wrap ---- */
.feed-wrap { }

/* ---- Responsive ---- */
@media (max-width: 520px) {
   .profile-info { flex-direction: column; align-items: flex-start; }
   .login-brand { text-align: center; }
   .nav-links .nav-link span { display: none; }
}