/* ──────────────────────────────────────────────────────────────────────────
   Tweetik — Twitter micro-clone
   Palette:
     --tw-bg:        #F7F9FA   (page background)
     --tw-surface:   #FFFFFF   (cards)
     --tw-border:    #EFF3F4   (borders)
     --tw-text:      #0F1419   (primary text)
     --tw-muted:     #536471   (secondary text / time)
     --tw-primary:   #1D9BF0   (Twitter blue, buttons)
     --tw-like:      #F91880   (heart / like)
     --tw-fire:      #FF7A00   (fire)
     --tw-thumb:     #1D9BF0   (thumbs-up = primary blue)
   Signature element: feather-pointed logo + compose textarea glow on focus
────────────────────────────────────────────────────────────────────────── */

:root {
  --tw-bg:        #F7F9FA;
  --tw-surface:   #FFFFFF;
  --tw-border:    #EFF3F4;
  --tw-text:      #0F1419;
  --tw-muted:     #536471;
  --tw-primary:   #1D9BF0;
  --tw-primary-h: #1a8cd8;
  --tw-like:      #F91880;
  --tw-fire:      #FF7A00;
  --tw-thumb:     #1D9BF0;
  --tw-radius:    16px;
  --tw-radius-sm: 8px;
  --tw-shadow:    0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
}

/* ── Reset & base ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  color: var(--tw-text);
  background: var(--tw-bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--tw-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible {
  outline: 2px solid var(--tw-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ── Navbar ──────────────────────────────────────────────────────────────── */
.tw-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--tw-surface);
  border-bottom: 1px solid var(--tw-border);
  padding: 0 1rem;
}

.tw-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 640px;
  margin: 0 auto;
  height: 53px;
  gap: .75rem;
}

.tw-logo {
  display: flex;
  align-items: center;
  gap: .45rem;
  color: var(--tw-primary);
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
  flex-shrink: 0;
}
.tw-logo i { font-size: 1.3rem; }
.tw-logo:hover { opacity: .85; }

.tw-logo-text { letter-spacing: -.02em; }

.tw-nav-actions {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-shrink: 0;
}

.tw-username-badge {
  font-size: .83rem;
  font-weight: 600;
  color: var(--tw-muted);
  display: flex;
  align-items: center;
  gap: .3rem;
}

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.tw-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .45rem 1.1rem;
  background: var(--tw-primary);
  color: #fff !important;
  border: none;
  border-radius: 9999px;
  font-family: inherit;
  font-size: .875rem;
  font-weight: 700;
  cursor: pointer;
  transition: background .15s;
  text-decoration: none !important;
  white-space: nowrap;
  line-height: 1.4;
}
.tw-btn-primary:hover  { background: var(--tw-primary-h); }
.tw-btn-primary:active { transform: scale(.97); }
.tw-btn-primary:focus-visible {
  outline: 2px solid var(--tw-primary);
  outline-offset: 3px;
}

.tw-btn-outline {
  display: inline-flex;
  align-items: center;
  padding: .45rem 1.1rem;
  background: transparent;
  color: var(--tw-primary) !important;
  border: 1.5px solid var(--tw-primary);
  border-radius: 9999px;
  font-family: inherit;
  font-size: .875rem;
  font-weight: 700;
  cursor: pointer;
  transition: background .15s;
  text-decoration: none !important;
  white-space: nowrap;
}
.tw-btn-outline:hover { background: rgba(29,155,240,.08); }

.tw-btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .4rem .75rem;
  background: transparent;
  color: var(--tw-muted) !important;
  border: none;
  border-radius: 9999px;
  font-family: inherit;
  font-size: .875rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s, color .15s;
  text-decoration: none !important;
}
.tw-btn-ghost:hover {
  background: rgba(0,0,0,.05);
  color: var(--tw-text) !important;
}

/* ── Main layout ─────────────────────────────────────────────────────────── */
.tw-main {
  padding: 0;
  min-height: calc(100vh - 53px);
}

.tw-feed-wrap {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 0 4rem;
}

/* ── Compose card ────────────────────────────────────────────────────────── */
.tw-compose-card {
  background: var(--tw-surface);
  border-bottom: 1px solid var(--tw-border);
  border-top: 3px solid var(--tw-primary);   /* visual separator from sticky nav */
  padding: 1rem 1rem .75rem;
}

.tw-compose-header {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin-bottom: .6rem;
}

.tw-avatar-icon {
  font-size: 2rem;
  color: var(--tw-primary);
  flex-shrink: 0;
}

.tw-compose-name {
  font-weight: 700;
  font-size: .9rem;
  color: var(--tw-text);
}

.tw-compose-textarea {
  display: block;
  width: 100%;
  border: 1.5px solid transparent;
  border-radius: var(--tw-radius-sm);
  padding: .6rem .75rem;
  font-family: inherit;
  font-size: 1rem;
  color: var(--tw-text);
  background: var(--tw-bg);
  resize: none;
  transition: border-color .2s, box-shadow .2s;
  line-height: 1.5;
}
.tw-compose-textarea::placeholder { color: var(--tw-muted); }
.tw-compose-textarea:focus {
  outline: none;
  border-color: var(--tw-primary);
  box-shadow: 0 0 0 3px rgba(29,155,240,.18);
}

.tw-compose-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: .6rem;
}

.tw-char-counter {
  font-size: .8rem;
  color: var(--tw-muted);
  font-variant-numeric: tabular-nums;
  min-width: 2.5rem;
  text-align: right;
}
.tw-char-counter.warn  { color: #FF7A00; }
.tw-char-counter.limit { color: var(--tw-like); }

.tw-post-btn { padding: .45rem 1.2rem; }
.tw-post-btn:disabled {
  opacity: .45;
  cursor: not-allowed;
}

.tw-compose-error {
  margin-top: .5rem;
  font-size: .85rem;
  color: var(--tw-like);
}

/* ── Welcome strip (replaces login prompt — no duplicate nav buttons) ────── */
.tw-welcome-strip {
  background: linear-gradient(135deg, rgba(29,155,240,.06) 0%, rgba(29,155,240,.02) 100%);
  border-bottom: 1px solid var(--tw-border);
  border-top: 3px solid var(--tw-primary);   /* visual separator from sticky nav */
  padding: .85rem 1rem;
}
.tw-welcome-inner {
  display: flex;
  align-items: center;
  gap: .65rem;
}
.tw-welcome-icon {
  font-size: 1.2rem;
  color: var(--tw-primary);
  flex-shrink: 0;
}
.tw-welcome-text {
  margin: 0;
  font-size: .875rem;
  color: var(--tw-muted);
  line-height: 1.4;
}
.tw-welcome-text a {
  font-weight: 700;
  color: var(--tw-primary);
}
.tw-welcome-text a:hover { text-decoration: underline; }

/* ── New banner ──────────────────────────────────────────────────────────── */
.tw-new-banner {
  position: sticky;
  top: 53px;
  z-index: 50;
  display: flex;
  justify-content: center;
  padding: .5rem;
}
.tw-new-banner[hidden] { display: none; }

.tw-new-banner-btn {
  background: var(--tw-primary);
  color: #fff;
  border: none;
  border-radius: 9999px;
  padding: .5rem 1.25rem;
  font-family: inherit;
  font-size: .875rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(29,155,240,.35);
  transition: background .15s, transform .15s;
  animation: slide-down .25s ease;
}
.tw-new-banner-btn:hover  { background: var(--tw-primary-h); transform: translateY(-1px); }
.tw-new-banner-btn:active { transform: scale(.97); }

@keyframes slide-down {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Posts list ──────────────────────────────────────────────────────────── */
.tw-posts-list { }

/* ── Post card ───────────────────────────────────────────────────────────── */
.tw-post {
  background: var(--tw-surface);
  border-bottom: 1px solid var(--tw-border);
  padding: .9rem 1rem .7rem;
  animation: fade-in .25s ease;
}
.tw-post:hover { background: #FAFBFB; }

@keyframes fade-in {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.tw-post-header {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin-bottom: .45rem;
}

.tw-post-meta {
  display: flex;
  align-items: baseline;
  gap: .5rem;
  flex-wrap: wrap;
  min-width: 0;
}

.tw-post-author {
  font-weight: 700;
  font-size: .9rem;
  color: var(--tw-text);
}

.tw-post-time {
  font-size: .8rem;
  color: var(--tw-muted);
}

.tw-post-content {
  margin: 0 0 .7rem;
  font-size: .975rem;
  line-height: 1.55;
  word-break: break-word;
  white-space: pre-wrap;
  color: var(--tw-text);
  padding-left: 2.6rem;
}

/* ── Reaction buttons ────────────────────────────────────────────────────── */
.tw-post-actions {
  display: flex;
  gap: .25rem;
  padding-left: 2.2rem;
}

.tw-react-btn {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  background: none;
  border: none;
  padding: .35rem .65rem;
  border-radius: 9999px;
  cursor: pointer;
  font-family: inherit;
  font-size: .85rem;
  font-weight: 500;
  color: var(--tw-muted);
  transition: background .15s, color .15s, transform .15s;
  user-select: none;
}
/* Inactive: icon at 40% opacity so solid icons look "hollow" */
.tw-react-btn i { opacity: .4; transition: opacity .15s, color .15s; }
.tw-react-btn:hover i { opacity: .75; }
.tw-react-btn.active i { opacity: 1; }

/* Like (heart) */
.tw-react-btn:hover {
  background: rgba(249,24,128,.08);
  color: var(--tw-like);
}
.tw-react-btn:hover i,
.tw-react-btn.active i.tw-icon-like { color: var(--tw-like); }
.tw-react-btn.active { color: var(--tw-like); }

/* Fire reaction */
.tw-react-btn.type-heart:hover {
  background: rgba(255,122,0,.08);
  color: var(--tw-fire);
}
.tw-react-btn.type-heart:hover i { color: var(--tw-fire); }
.tw-react-btn.type-heart.active {
  background: rgba(255,122,0,.08);
  color: var(--tw-fire);
}
.tw-react-btn.type-heart.active i { color: var(--tw-fire); }

/* Thumbs-up reaction */
.tw-react-btn.type-fire:hover {
  background: rgba(29,155,240,.08);
  color: var(--tw-thumb);
}
.tw-react-btn.type-fire:hover i { color: var(--tw-thumb); }
.tw-react-btn.type-fire.active {
  background: rgba(29,155,240,.08);
  color: var(--tw-thumb);
}
.tw-react-btn.type-fire.active i { color: var(--tw-thumb); }

.tw-react-btn:focus-visible {
  outline: 2px solid var(--tw-primary);
  outline-offset: 2px;
}

.tw-react-btn:active { transform: scale(.88); }

.tw-react-count {
  font-variant-numeric: tabular-nums;
  min-width: 1ch;
  text-align: left;
}

/* bounce animation on react */
@keyframes react-pop {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.5); }
  60%  { transform: scale(.85); }
  100% { transform: scale(1); }
}
.tw-react-btn.popping i { animation: react-pop .35s ease; }

/* ── Empty state ─────────────────────────────────────────────────────────── */
.tw-empty-state {
  text-align: center;
  padding: 3.5rem 1rem;
  color: var(--tw-muted);
}
.tw-empty-icon {
  display: block;
  font-size: 2.5rem;
  margin-bottom: .75rem;
  color: var(--tw-border);
}

/* ── End-of-feed marker ──────────────────────────────────────────────────── */
.tw-feed-end {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: 1.75rem 1rem 2.5rem;
  color: var(--tw-border);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.tw-feed-end i { font-size: .85rem; }

/* ── Auth pages ──────────────────────────────────────────────────────────── */
.tw-auth-wrap {
  min-height: calc(100vh - 53px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem 1rem;
}

.tw-auth-card {
  background: var(--tw-surface);
  border: 1px solid var(--tw-border);
  border-radius: var(--tw-radius);
  padding: 2rem 1.75rem;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--tw-shadow);
}

.tw-auth-logo {
  text-align: center;
  font-size: 2.5rem;
  color: var(--tw-primary);
  margin-bottom: 1rem;
}

.tw-auth-title {
  font-size: 1.35rem;
  font-weight: 800;
  text-align: center;
  margin: 0 0 1.25rem;
  letter-spacing: -.02em;
}

.tw-alert-error {
  background: rgba(249,24,128,.07);
  border: 1px solid rgba(249,24,128,.25);
  border-radius: var(--tw-radius-sm);
  color: #b2004a;
  padding: .65rem .9rem;
  font-size: .875rem;
  margin-bottom: 1rem;
}

.tw-field { margin-bottom: 1rem; }

.tw-label {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  color: var(--tw-muted);
  margin-bottom: .35rem;
}

.tw-input {
  display: block;
  width: 100%;
  padding: .6rem .85rem;
  border: 1.5px solid var(--tw-border);
  border-radius: var(--tw-radius-sm);
  font-family: inherit;
  font-size: .95rem;
  color: var(--tw-text);
  background: var(--tw-surface);
  transition: border-color .2s, box-shadow .2s;
}
.tw-input::placeholder { color: var(--tw-muted); opacity: .65; }
.tw-input:focus {
  outline: none;
  border-color: var(--tw-primary);
  box-shadow: 0 0 0 3px rgba(29,155,240,.18);
}

.tw-field-hint {
  display: block;
  font-size: .78rem;
  color: var(--tw-muted);
  margin-top: .25rem;
}

.tw-auth-submit {
  width: 100%;
  padding: .65rem;
  font-size: .95rem;
  margin-top: .5rem;
  border-radius: var(--tw-radius-sm);
}

.tw-auth-switch {
  text-align: center;
  margin: 1.25rem 0 0;
  font-size: .875rem;
  color: var(--tw-muted);
}
.tw-auth-switch a {
  font-weight: 700;
  color: var(--tw-primary);
}

/* ── Gravatar avatar ─────────────────────────────────────────────────────── */
.tw-avatar-img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  background: var(--tw-border);
  display: block;
}

/* ── @mention links ──────────────────────────────────────────────────────── */
.tw-mention {
  color: var(--tw-primary);
  font-weight: 600;
  text-decoration: none;
}
.tw-mention:hover {
  text-decoration: underline;
  color: var(--tw-primary-h);
}

/* ── #hashtag links ───────────────────────────────────────────────────────── */
.tw-hashtag {
  color: var(--tw-primary);
  font-weight: 600;
  text-decoration: none;
}
.tw-hashtag:hover {
  text-decoration: underline;
  color: var(--tw-primary-h);
}
.tw-hashtag-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--tw-primary);
  background: rgba(29,155,240,.08);
  border: 3px solid var(--tw-border);
}

/* ── Feed tabs («Все твиты» / «Подписки») ───────────────────────────────── */
.tw-feed-tabs {
  display: flex;
  background: var(--tw-surface);
  border-bottom: 1px solid var(--tw-border);
}

.tw-feed-tab {
  flex: 1 1 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .35rem;
  padding: .8rem .5rem;
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  font-family: inherit;
  font-size: .875rem;
  font-weight: 700;
  color: var(--tw-muted);
  cursor: pointer;
  transition: color .15s, background .15s;
}
.tw-feed-tab:hover { background: rgba(0,0,0,.03); color: var(--tw-text); }
.tw-feed-tab.active {
  color: var(--tw-primary);
  border-bottom-color: var(--tw-primary);
}
.tw-feed-tab:focus-visible {
  outline: 2px solid var(--tw-primary);
  outline-offset: -2px;
}

/* ── Follow / unfollow button ────────────────────────────────────────────── */
.tw-follow-btn { flex-shrink: 0; }
.tw-follow-btn.following {
  background: var(--tw-surface);
  color: var(--tw-text) !important;
  border: 1.5px solid var(--tw-border);
}
.tw-follow-btn.following:hover {
  background: rgba(249,24,128,.06);
  color: var(--tw-like) !important;
  border-color: rgba(249,24,128,.35);
}

/* ── Delete tweet button ─────────────────────────────────────────────────── */
.tw-delete-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  border-radius: 50%;
  color: var(--tw-muted);
  cursor: pointer;
  opacity: 0;
  transition: opacity .15s, background .15s, color .15s;
  flex-shrink: 0;
  padding: 0;
}
.tw-post:hover .tw-delete-btn { opacity: 1; }
.tw-delete-btn:hover {
  background: rgba(249,24,128,.1);
  color: var(--tw-like);
}
.tw-delete-btn:focus-visible {
  outline: 2px solid var(--tw-like);
  outline-offset: 2px;
  opacity: 1;
}
/* Always show delete btn on touch devices */
@media (hover: none) {
  .tw-delete-btn { opacity: 0.6; }
}

/* ── User profile page ───────────────────────────────────────────────────── */
.tw-profile-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1rem;
  background: var(--tw-surface);
  border-bottom: 1px solid var(--tw-border);
  border-top: 3px solid var(--tw-primary);
}

.tw-profile-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 3px solid var(--tw-border);
}

.tw-profile-info {
  min-width: 0;
}

.tw-profile-name {
  font-size: 1.15rem;
  font-weight: 800;
  margin: 0 0 .2rem;
  color: var(--tw-text);
  letter-spacing: -.02em;
}

.tw-profile-meta {
  font-size: .8rem;
  color: var(--tw-muted);
  margin: 0 0 .25rem;
}

.tw-profile-stats {
  font-size: .85rem;
  color: var(--tw-muted);
  margin: 0;
}

.tw-muted-text {
  color: var(--tw-muted);
  font-weight: 400;
}

/* ── Post author link ────────────────────────────────────────────────────── */
.tw-post-author {
  font-weight: 700;
  font-size: .9rem;
  color: var(--tw-text);
  text-decoration: none;
}
.tw-post-author:hover {
  color: var(--tw-primary);
  text-decoration: underline;
}

/* ── Mobile tweaks ───────────────────────────────────────────────────────── */
@media (max-width: 480px) {
  .tw-compose-card { padding: .75rem .75rem .6rem; }
  .tw-post { padding: .8rem .75rem .6rem; }
  .tw-post-content { padding-left: 0; }
  .tw-post-actions { padding-left: 0; }
  .tw-auth-card { padding: 1.5rem 1.25rem; border: none; box-shadow: none; }
  .tw-logo-text { display: none; }
  .tw-react-btn { padding: .3rem .5rem; font-size: .8rem; }
  .tw-feed-tab { font-size: .8rem; padding: .7rem .35rem; }
  .tw-profile-header { flex-wrap: wrap; }
  .tw-follow-btn { margin-left: 0 !important; }
}

/* ── Reduced motion ──────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}