/* ============================================================
   BELLA — Professional UI Stylesheet
   Themes: Rose (default), Night, Sakura, Ocean, Forest
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
button { font-family: inherit; cursor: pointer; }
input  { font-family: inherit; }


.splash-logo-img {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 0 40px rgba(244,114,182,0.5);
  margin-bottom: 16px;
  animation: splashPulse 2s ease-in-out infinite;
}
.bella-disclaimer {
  text-align: center;
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  padding: 6px 16px;
  background: var(--input-bg);
  border-top: 1px solid var(--border);
  letter-spacing: 0.1px;
  line-height: 1.5;
}

/* ── Theme: Rose (Default) ── */
:root {
  --bg:              #fce4f0;
  --container:       #fff8fc;
  --header-from:     #f472b6;
  --header-to:       #c084fc;
  --header-text:     #ffffff;
  --user-from:       #f472b6;
  --user-to:         #c084fc;
  --user-text:       #ffffff;
  --bot-bubble:      #fce7f3;
  --bot-text:        #3b1a2e;
  --muted:           #b07a9e;
  --border:          #f0cce5;
  --input-bg:        #fff0f8;
  --input-border:    #f0b8d8;
  --heart:           #ec4899;
  --accent:          #c084fc;
  --shadow:          rgba(244,114,182,0.18);
  --card-bg:         #fff4fa;
  --overlay-bg:      rgba(30,5,40,0.55);
  --gold:            #fbbf24;
  --danger:          #f43f5e;
  --success:         #10b981;
  --streak:          #fb923c;
  --radius-lg:       24px;
  --radius-md:       16px;
  --radius-sm:       12px;
  --transition:      0.25s cubic-bezier(.4,0,.2,1);
}

/* ── Theme: Night ── */
[data-theme="night"] {
  --bg:              #0d0717;
  --container:       #150d22;
  --header-from:     #7c3aed;
  --header-to:       #4f46e5;
  --bot-bubble:      #1f1235;
  --bot-text:        #e9d5ff;
  --muted:           #8b6fad;
  --border:          #2e1a4a;
  --input-bg:        #1f1235;
  --input-border:    #4a2575;
  --heart:           #a78bfa;
  --accent:          #818cf8;
  --shadow:          rgba(124,58,237,0.2);
  --card-bg:         #1f1235;
}

/* ── Theme: Sakura ── */
[data-theme="sakura"] {
  --bg:              #fff0f3;
  --container:       #fffafa;
  --header-from:     #fb7185;
  --header-to:       #f43f5e;
  --user-from:       #fb7185;
  --user-to:         #f43f5e;
  --bot-bubble:      #ffe4e8;
  --bot-text:        #3f1520;
  --muted:           #be7585;
  --border:          #fecdd3;
  --input-bg:        #fff5f6;
  --input-border:    #fda4af;
  --heart:           #f43f5e;
  --accent:          #fb7185;
  --shadow:          rgba(251,113,133,0.2);
  --card-bg:         #fff5f6;
}

/* ── Theme: Ocean ── */
[data-theme="ocean"] {
  --bg:              #e0f2fe;
  --container:       #f0faff;
  --header-from:     #0ea5e9;
  --header-to:       #6366f1;
  --user-from:       #0ea5e9;
  --user-to:         #6366f1;
  --bot-bubble:      #e0f2fe;
  --bot-text:        #0c2a4a;
  --muted:           #5b8faa;
  --border:          #bae6fd;
  --input-bg:        #f0faff;
  --input-border:    #7dd3fc;
  --heart:           #0ea5e9;
  --accent:          #6366f1;
  --shadow:          rgba(14,165,233,0.18);
  --card-bg:         #f0faff;
}

/* ── Theme: Forest ── */
[data-theme="forest"] {
  --bg:              #ecfdf5;
  --container:       #f0fdf4;
  --header-from:     #059669;
  --header-to:       #0d9488;
  --user-from:       #059669;
  --user-to:         #0d9488;
  --bot-bubble:      #d1fae5;
  --bot-text:        #064e3b;
  --muted:           #4d8068;
  --border:          #a7f3d0;
  --input-bg:        #f0fdf4;
  --input-border:    #6ee7b7;
  --heart:           #059669;
  --accent:          #0d9488;
  --shadow:          rgba(5,150,105,0.18);
  --card-bg:         #f0fdf4;
}

/* ============================================================
   BASE LAYOUT
   ============================================================ */
body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100dvh;
  transition: background var(--transition);
  overflow: hidden;
}
body.wallpaper-active {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.chat-container {
  width: 100%;
  max-width: 420px;
  height: 100%;
  max-height: 780px;
  background: var(--container);
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-lg);
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.5) inset,
    0 20px 60px var(--shadow),
    0 4px 12px rgba(0,0,0,0.08);
  overflow: hidden;
  transition: background var(--transition);
  position: relative;
}

/* ============================================================
   SPLASH
   ============================================================ */
.splash-screen {
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, var(--header-from) 0%, var(--header-to) 100%);
  z-index: 500;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.splash-screen.fade-out { opacity: 0; transform: scale(1.04); pointer-events: none; }
.splash-screen.gone { display: none; }
.splash-logo { font-size: 64px; animation: splashPulse 2s infinite ease-in-out; filter: drop-shadow(0 4px 16px rgba(255,255,255,0.3)); }
.splash-title { color: #fff; font-size: 28px; font-weight: 800; letter-spacing: -0.5px; }
.splash-sub   { color: rgba(255,255,255,0.75); font-size: 13px; font-weight: 500; }
.splash-spinner {
  width: 28px; height: 28px;
  border: 3px solid rgba(255,255,255,0.25);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin-top: 8px;
}

/* ============================================================
   HEADER
   ============================================================ */
.chat-header {
  background: linear-gradient(135deg, var(--header-from) 0%, var(--header-to) 100%);
  color: var(--header-text);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
  box-shadow: 0 2px 16px var(--shadow);
  position: relative;
  z-index: 10;
}
.header-left { display: flex; align-items: center; gap: 10px; }
.header-avatar {
  width: 38px; height: 38px; border-radius: 50%;
  background: rgba(255,255,255,0.2);
  border: 2px solid rgba(255,255,255,0.35);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
  flex-shrink: 0;
}
.header-name { font-size: 15px; font-weight: 800; letter-spacing: -0.3px; }
.header-status { font-size: 11px; font-weight: 500; opacity: 0.8; }
.streak-pill {
  background: rgba(255,255,255,0.2);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 20px;
  padding: 3px 9px;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 3px;
  white-space: nowrap;
}
.streak-pill.hidden { display: none; }
.premium-badge {
  background: var(--gold);
  color: #78350f;
  font-size: 9px;
  font-weight: 800;
  padding: 2px 7px;
  border-radius: 8px;
  letter-spacing: 0.5px;
  display: none;
}
.premium-badge.visible { display: inline-block; }

.header-right { display: flex; align-items: center; gap: 5px; }
.header-btn {
  background: rgba(255,255,255,0.18);
  border: 1px solid rgba(255,255,255,0.25);
  color: #fff;
  border-radius: 50%;
  width: 32px; height: 32px;
  font-size: 13px;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition), transform 0.15s;
  flex-shrink: 0;
}
.header-btn:hover { background: rgba(255,255,255,0.32); transform: scale(1.08); }
.heart-pill {
  background: rgba(255,255,255,0.18);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 20px;
  padding: 5px 11px;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  display: flex; align-items: center; gap: 4px;
  transition: background var(--transition);
  white-space: nowrap;
  cursor: pointer;
}
.heart-pill:hover { background: rgba(255,255,255,0.3); }

/* ============================================================
   USER BAR
   ============================================================ */
.user-bar {
  background: var(--card-bg);
  border-bottom: 1.5px solid var(--border);
  padding: 5px 14px;
  display: none;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}
.user-bar.visible { display: flex; }
.user-bar-left { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--muted); font-weight: 600; }
.user-bar-name { color: var(--bot-text); font-weight: 700; }
.logout-btn { background: none; border: none; font-size: 11px; color: var(--heart); font-weight: 700; text-decoration: underline; padding: 0; }

/* ============================================================
   MESSAGES
   ============================================================ */
.chat-messages {
  flex: 1;
  padding: 14px 12px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: var(--container);
  scroll-behavior: smooth;
}
.chat-messages::-webkit-scrollbar { width: 3px; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.message-row {
  display: flex;
  flex-direction: column;
  max-width: 78%;
  animation: fadeUp 0.22s ease-out;
}
.message-row.user-row { align-self: flex-end; align-items: flex-end; }
.message-row.bot-row  { align-self: flex-start; align-items: flex-start; }

.message {
  padding: 10px 15px;
  border-radius: 20px;
  line-height: 1.6;
  font-size: 14px;
  word-wrap: break-word;
  font-weight: 500;
  white-space: pre-wrap;
}
.message.user {
  background: linear-gradient(135deg, var(--user-from), var(--user-to));
  color: var(--user-text);
  border-bottom-right-radius: 4px;
  box-shadow: 0 3px 12px var(--shadow);
}
.message.bot {
  background: var(--bot-bubble);
  color: var(--bot-text);
  border-bottom-left-radius: 4px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.04);
}
.message.typing { font-style: italic; color: var(--muted); }

.timestamp { font-size: 10px; color: var(--muted); margin-top: 3px; padding: 0 5px; font-weight: 600; }

.audio-btn {
  margin-top: 4px;
  background: none;
  border: 1.5px solid var(--border);
  color: var(--muted);
  border-radius: 20px;
  font-size: 11px; font-weight: 600;
  padding: 4px 12px;
  transition: all 0.2s;
}
.audio-btn:hover { border-color: var(--heart); color: var(--heart); background: var(--bot-bubble); }

/* Date divider */
.date-divider {
  align-self: center;
  font-size: 11px;
  font-weight: 700;
  color: var(--muted);
  background: var(--border);
  padding: 3px 12px;
  border-radius: 20px;
  margin: 8px 0;
}

/* Image bubble */
.image-bubble {
  background: var(--bot-bubble);
  padding: 7px;
  border-radius: 20px;
  border-bottom-left-radius: 4px;
  display: inline-block;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.image-bubble img {
  width: 200px;
  border-radius: 13px;
  display: block;
  cursor: pointer;
  transition: transform 0.2s;
}
.image-bubble img:hover { transform: scale(1.02); }
.image-actions { display: flex; justify-content: flex-end; gap: 6px; margin-top: 6px; }
.image-actions button {
  background: linear-gradient(135deg, var(--user-from), var(--user-to));
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 11px; font-weight: 700;
  padding: 5px 11px;
  transition: opacity 0.2s;
}
.image-actions button:hover { opacity: 0.85; }

/* ============================================================
   INPUT BAR
   ============================================================ */
.chat-input {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-top: 1.5px solid var(--border);
  background: var(--container);
  flex-shrink: 0;
}
.chat-input input {
  flex: 1;
  border: 2px solid var(--input-border);
  border-radius: 22px;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  background: var(--input-bg);
  color: var(--bot-text);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  min-width: 0;
}
.chat-input input:focus {
  border-color: var(--heart);
  box-shadow: 0 0 0 3px rgba(236,72,153,0.1);
}
.chat-input input::placeholder { color: var(--muted); }
.send-btn {
  background: linear-gradient(135deg, var(--user-from), var(--user-to));
  color: #fff;
  border: none;
  border-radius: 22px;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 3px 12px var(--shadow);
  transition: transform 0.15s, opacity 0.2s;
  white-space: nowrap;
}
.send-btn:hover { transform: translateY(-1px); opacity: 0.92; }
.send-btn:disabled { background: var(--border); color: var(--muted); box-shadow: none; transform: none; }

/* ============================================================
   AUTH OVERLAY
   ============================================================ */
.auth-overlay {
  position: absolute;
  inset: 0;
  background: var(--container);
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 24px;
  overflow-y: auto;
  transition: background var(--transition);
}
.auth-overlay.hidden { display: none; }

.auth-logo { font-size: 56px; margin-bottom: 8px; filter: drop-shadow(0 4px 12px var(--shadow)); }
.auth-title { font-size: 24px; font-weight: 800; color: var(--bot-text); margin-bottom: 4px; letter-spacing: -0.5px; }
.auth-sub { font-size: 13px; color: var(--muted); margin-bottom: 24px; text-align: center; line-height: 1.6; font-weight: 500; }

.auth-tabs {
  display: flex;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 20px;
  width: 100%;
}
.auth-tab {
  flex: 1; padding: 11px;
  font-size: 14px; font-weight: 700;
  background: transparent; border: none;
  color: var(--muted); transition: all 0.2s;
}
.auth-tab.active {
  background: linear-gradient(135deg, var(--user-from), var(--user-to));
  color: #fff;
}

.auth-form { width: 100%; display: flex; flex-direction: column; gap: 12px; }
.auth-input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--input-border);
  border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 500;
  background: var(--input-bg);
  color: var(--bot-text);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.auth-input:focus {
  border-color: var(--heart);
  box-shadow: 0 0 0 3px rgba(236,72,153,0.1);
}
.auth-error { font-size: 12px; color: var(--danger); text-align: center; font-weight: 600; min-height: 16px; }
.auth-submit {
  width: 100%;
  padding: 13px;
  background: linear-gradient(135deg, var(--user-from), var(--user-to));
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 15px; font-weight: 700;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  box-shadow: 0 4px 16px var(--shadow);
  transition: opacity 0.2s, transform 0.15s;
}
.auth-submit:hover { opacity: 0.92; transform: translateY(-1px); }
.auth-submit:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.btn-spinner {
  width: 15px; height: 15px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: none;
}
.auth-submit.loading .btn-spinner { display: block; }

/* ============================================================
   LIGHTBOX
   ============================================================ */
.lightbox-overlay {
  position: fixed; inset: 0;
  background: rgba(10,2,20,0.9);
  display: none; align-items: center; justify-content: center;
  z-index: 9999;
  backdrop-filter: blur(8px);
}
.lightbox-overlay.active { display: flex; }
.lightbox-overlay img {
  max-width: 90%; max-height: 82%;
  border-radius: var(--radius-md);
  box-shadow: 0 12px 60px rgba(0,0,0,0.6);
}
.lightbox-close {
  position: absolute; top: 16px; right: 16px;
  background: rgba(255,255,255,0.15); color: #fff; border: none;
  border-radius: 50%; width: 40px; height: 40px; font-size: 18px;
  backdrop-filter: blur(4px); transition: background 0.2s;
  display: flex; align-items: center; justify-content: center;
}
.lightbox-close:hover { background: rgba(255,255,255,0.28); }

/* ============================================================
   GALLERY PANEL
   ============================================================ */
.gallery-panel {
  position: absolute; inset: 0;
  background: var(--container);
  z-index: 50;
  display: none; flex-direction: column;
  transition: background var(--transition);
}
.gallery-panel.open { display: flex; }
.panel-header {
  background: linear-gradient(135deg, var(--header-from), var(--header-to));
  color: #fff;
  padding: 14px 16px;
  font-size: 15px; font-weight: 800;
  display: flex; align-items: center; justify-content: space-between;
  flex-shrink: 0;
}
.panel-close {
  background: rgba(255,255,255,0.2); border: none; color: #fff;
  border-radius: 50%; width: 30px; height: 30px;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; transition: background 0.2s;
}
.panel-close:hover { background: rgba(255,255,255,0.35); }
.gallery-grid {
  flex: 1; overflow-y: auto; padding: 10px;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; align-content: start;
}
.gallery-grid img { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: var(--radius-sm); cursor: pointer; transition: transform 0.2s; }
.gallery-grid img:hover { transform: scale(1.04); }
.gallery-empty { grid-column: 1/-1; text-align: center; color: var(--muted); padding: 40px 20px; font-size: 13px; font-weight: 600; }

/* ============================================================
   HEARTS PANEL
   ============================================================ */
.hearts-panel {
  position: absolute; inset: 0;
  background: var(--container);
  z-index: 50;
  display: none; flex-direction: column;
  transition: background var(--transition);
}
.hearts-panel.open { display: flex; }
.hearts-body { flex: 1; overflow-y: auto; padding: 16px 14px; display: flex; flex-direction: column; gap: 12px; }

.hearts-balance-card {
  background: linear-gradient(135deg, var(--user-from), var(--user-to));
  border-radius: var(--radius-md); padding: 22px 20px;
  color: #fff; text-align: center;
  box-shadow: 0 6px 20px var(--shadow);
}
.hb-icon { font-size: 46px; margin-bottom: 6px; }
.hb-count { font-size: 48px; font-weight: 800; line-height: 1; }
.hb-label { font-size: 13px; opacity: 0.85; margin-top: 4px; font-weight: 600; }
.hb-reset { font-size: 11px; opacity: 0.7; margin-top: 6px; }

/* Streak card */
.streak-card {
  background: var(--card-bg);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: flex; align-items: center; gap: 14px;
}
.streak-icon { font-size: 32px; }
.streak-info { flex: 1; }
.streak-days { font-size: 22px; font-weight: 800; color: var(--streak); }
.streak-label { font-size: 12px; color: var(--muted); font-weight: 600; margin-top: 1px; }
.streak-bonus { font-size: 11px; color: var(--success); font-weight: 700; margin-top: 3px; }

.hearts-section {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  border: 1.5px solid var(--border);
}
.section-title {
  font-size: 10px; font-weight: 800;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 10px;
}
.hbr-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px; font-weight: 500; color: var(--bot-text);
}
.hbr-row:last-child { border-bottom: none; }
.hbr-cost { font-weight: 700; color: var(--heart); }
.hdi-row { display: flex; justify-content: space-between; align-items: center; padding: 5px 0; font-size: 13px; color: var(--bot-text); font-weight: 500; }
.hdi-val { font-weight: 700; color: var(--heart); }

.watch-ad-btn {
  width: 100%;
  background: linear-gradient(135deg, var(--user-from), var(--user-to));
  color: #fff; border: none;
  border-radius: var(--radius-sm); padding: 13px;
  font-size: 14px; font-weight: 700;
  box-shadow: 0 4px 14px var(--shadow);
  transition: transform 0.15s, opacity 0.2s;
  margin-top: 4px;
}
.watch-ad-btn:hover { transform: translateY(-1px); opacity: 0.9; }
.watch-ad-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.ad-note { font-size: 11px; color: var(--muted); font-weight: 600; text-align: center; min-height: 16px; margin-top: 4px; }
.adsense-slot { border-radius: var(--radius-sm); overflow: hidden; min-height: 60px; background: var(--card-bg); }

/* ============================================================
   SETTINGS PANEL
   ============================================================ */
.settings-panel {
  position: absolute; inset: 0;
  background: var(--container);
  z-index: 50;
  display: none; flex-direction: column;
  transition: background var(--transition);
}
.settings-panel.open { display: flex; }
.settings-body { flex: 1; overflow-y: auto; padding: 16px 14px; display: flex; flex-direction: column; gap: 12px; }

.settings-section {
  background: var(--card-bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
}
.settings-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 9px 0;
  border-bottom: 1px solid var(--border);
  gap: 12px;
}
.settings-row:last-child { border-bottom: none; }
.settings-row-label { font-size: 13px; font-weight: 600; color: var(--bot-text); display: flex; align-items: center; gap: 7px; }
.settings-row-label span { font-size: 16px; }

/* Theme picker */
.theme-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  padding: 4px 0;
}
.theme-chip {
  display: flex; flex-direction: column; align-items: center; gap: 5px;
  cursor: pointer; padding: 6px 4px; border-radius: 10px;
  transition: background 0.2s;
  border: 2px solid transparent;
}
.theme-chip:hover { background: var(--border); }
.theme-chip.active { border-color: var(--heart); background: var(--bot-bubble); }
.theme-swatch {
  width: 28px; height: 28px; border-radius: 50%;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.theme-chip-label { font-size: 9px; font-weight: 700; color: var(--muted); }

/* Toggle switch */
.toggle-switch {
  position: relative; width: 40px; height: 22px; flex-shrink: 0;
}
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-track {
  position: absolute; inset: 0;
  background: var(--border);
  border-radius: 11px;
  transition: background 0.2s;
  cursor: pointer;
}
.toggle-track::before {
  content: '';
  position: absolute;
  width: 16px; height: 16px;
  left: 3px; top: 3px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.2s;
  box-shadow: 0 1px 4px rgba(0,0,0,0.15);
}
.toggle-switch input:checked + .toggle-track { background: var(--heart); }
.toggle-switch input:checked + .toggle-track::before { transform: translateX(18px); }

/* Pollinations credit */
.pollinations-credit {
  background: linear-gradient(135deg, rgba(244,114,182,0.08), rgba(192,132,252,0.08));
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex; flex-direction: column; gap: 8px;
  text-align: center;
}
.pollinations-logo { font-size: 28px; }
.pollinations-text { font-size: 13px; color: var(--bot-text); font-weight: 600; line-height: 1.5; }
.pollinations-link {
  display: inline-block;
  background: linear-gradient(135deg, var(--user-from), var(--user-to));
  color: #fff; text-decoration: none;
  border-radius: 10px; padding: 8px 18px;
  font-size: 13px; font-weight: 700;
  transition: opacity 0.2s;
}
.pollinations-link:hover { opacity: 0.85; }

/* ============================================================
   CONFIRM DIALOG
   ============================================================ */
.confirm-dialog {
  position: absolute; inset: 0;
  background: var(--overlay-bg);
  z-index: 200;
  display: none; align-items: center; justify-content: center;
  padding: 20px;
  backdrop-filter: blur(6px);
}
.confirm-dialog.open { display: flex; }
.confirm-box {
  background: var(--container); border-radius: var(--radius-md);
  padding: 26px 22px; width: 100%; max-width: 290px; text-align: center;
  box-shadow: 0 12px 40px rgba(0,0,0,0.25);
}
.confirm-box h3 { font-size: 17px; color: var(--bot-text); margin-bottom: 8px; font-weight: 800; }
.confirm-box p { font-size: 13px; color: var(--muted); line-height: 1.6; margin-bottom: 20px; }
.confirm-actions { display: flex; gap: 10px; }
.confirm-actions button {
  flex: 1; padding: 12px; border: none; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 700; transition: opacity 0.2s;
}
.btn-cancel { background: var(--border); color: var(--bot-text); }
.btn-clear  { background: linear-gradient(135deg, #f43f5e, #ec4899); color: #fff; box-shadow: 0 3px 12px rgba(244,63,94,0.3); }

/* ============================================================
   TOASTS
   ============================================================ */
.toast {
  position: absolute; bottom: 74px; left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: linear-gradient(135deg, var(--user-from), var(--user-to));
  color: #fff;
  padding: 10px 20px;
  border-radius: 22px;
  font-size: 13px; font-weight: 700;
  z-index: 300;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s;
  white-space: nowrap;
  box-shadow: 0 4px 16px var(--shadow);
  max-width: 320px; text-align: center;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* Birthday modal */
.birthday-modal {
  position: absolute; inset: 0;
  background: var(--overlay-bg);
  z-index: 400;
  display: none; align-items: center; justify-content: center;
  backdrop-filter: blur(8px);
}
.birthday-modal.open { display: flex; }
.birthday-box {
  background: var(--container);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  max-width: 300px; width: 90%;
  box-shadow: 0 16px 50px rgba(0,0,0,0.3);
}
.birthday-emoji { font-size: 56px; margin-bottom: 10px; animation: splashPulse 1.5s infinite; }
.birthday-title { font-size: 20px; font-weight: 800; color: var(--bot-text); margin-bottom: 6px; }
.birthday-msg { font-size: 14px; color: var(--muted); line-height: 1.6; margin-bottom: 20px; }
.birthday-btn {
  background: linear-gradient(135deg, var(--user-from), var(--user-to));
  color: #fff; border: none; border-radius: 14px;
  padding: 12px 28px; font-size: 14px; font-weight: 700;
  box-shadow: 0 4px 16px var(--shadow);
  transition: opacity 0.2s;
}
.birthday-btn:hover { opacity: 0.88; }

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes splashPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes heartPop {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.45); }
  100% { transform: scale(1); }
}
.heart-pop { animation: heartPop 0.3s ease-out; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 480px) {
  .chat-container { border-radius: 0; max-height: 100dvh; }
  body { align-items: stretch; }
}

/* ============================================================
   IMAGE SKELETON SHIMMER
   ============================================================ */
.image-skeleton {
  width: 200px;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bot-bubble);
  border: 1px solid var(--border);
  padding-bottom: 8px;
}
.skeleton-shimmer {
  width: 100%;
  height: 200px;
  background: linear-gradient(
    90deg,
    var(--bot-bubble) 0%,
    var(--border) 40%,
    var(--bot-bubble) 80%
  );
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite linear;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}
.skeleton-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  text-align: center;
  padding: 8px 4px 2px;
  animation: fadeUp 0.3s ease;
}
@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ============================================================
   AVATAR PICKER
   ============================================================ */
.avatar-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-top: 4px;
}
.avatar-chip {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  aspect-ratio: 1;
  font-size: 26px;
  border-radius: var(--radius-sm);
  border: 2.5px solid var(--border);
  background: var(--card-bg);
  cursor: pointer;
  transition: border-color var(--transition), transform var(--transition);
  user-select: none;
}
.avatar-chip:hover  { transform: scale(1.08); }
.avatar-chip.active {
  border-color: var(--heart);
  background: var(--input-bg);
  box-shadow: 0 0 0 3px var(--shadow);
}

/* ============================================================
   PREMIUM PANEL
   ============================================================ */
.premium-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 16px 16px;
  text-align: center;
  background: linear-gradient(135deg, var(--header-from), var(--header-to));
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  color: #fff;
}
.premium-hero-icon  { font-size: 40px; margin-bottom: 8px; }
.premium-hero-title { font-size: 22px; font-weight: 800; letter-spacing: -0.5px; }
.premium-hero-sub   { font-size: 13px; font-weight: 500; opacity: 0.88; margin-top: 4px; }

.premium-perk {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 9px 0;
  font-size: 13px;
  font-weight: 600;
  color: var(--bot-text);
  border-bottom: 1px solid var(--border);
}
.premium-perk:last-child { border-bottom: none; }
.premium-perk span:first-child { font-size: 18px; width: 24px; text-align: center; }

.premium-plan-btn {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 2px solid var(--border);
  background: var(--card-bg);
  cursor: pointer;
  margin-bottom: 10px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.premium-plan-btn:hover {
  border-color: var(--heart);
  box-shadow: 0 2px 12px var(--shadow);
}
.premium-plan-featured {
  border-color: var(--heart);
  background: linear-gradient(135deg, var(--header-from)15, var(--header-to)15);
}
.plan-label {
  font-size: 14px;
  font-weight: 700;
  color: var(--bot-text);
  display: flex;
  align-items: center;
  gap: 8px;
}
.plan-badge {
  font-size: 10px;
  font-weight: 800;
  background: var(--heart);
  color: #fff;
  padding: 2px 7px;
  border-radius: 99px;
  letter-spacing: 0.2px;
}
.plan-price {
  font-size: 13px;
  font-weight: 700;
  color: var(--heart);
}

/* ============================================================
   PUSH NOTIFICATION CARD
   ============================================================ */
.push-notif-card {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 12px 14px;
  background: var(--card-bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  margin-bottom: 12px;
}
.push-notif-icon { font-size: 22px; }
.push-notif-text { font-size: 12px; font-weight: 500; color: var(--muted); line-height: 1.5; }
.push-notif-text strong { color: var(--bot-text); font-weight: 700; }

/* premium-badge clickable style */
.premium-badge.clickable { cursor: pointer; }
.premium-badge.clickable:hover { opacity: 0.85; }