/* === RESET & BASE === */
*, *::before, *::after { box-sizing: border-box; }

/* Generyczna klasa ukrywająca — nadrzędna wobec display elementów przełączanych z JS */
.hidden { display: none !important; }

:root {
  --primary: #1A73E8;
  --primary-hover: #1557B0;
  --aurora-start: #4285F4;
  --aurora-mid: #9B59D8;
  --aurora-end: #E94040;
  --sidebar-bg: #EAF1FB;
  --sidebar-border: #D3E3FD;
  --main-bg: #ffffff;
  --surface: #F0F4F9;
  --surface-hover: #E8F0FE;
  --text-primary: #1F1F1F;
  --text-secondary: #5F6368;
  --text-placeholder: #9AA0A6;
  --border: #E0E7FF;
  --composer-border: #D3E3FD;
  --bubble-user: #E8F0FE;
  --bubble-user-border: #D3E3FD;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 8px;
  --font: 'Google Sans', -apple-system, Roboto, 'Segoe UI', Arial, sans-serif;
  --transition: 150ms ease;
}

html, body { margin: 0; height: 100%; overflow: hidden; font-family: var(--font); color: var(--text-primary); background: var(--surface); }

/* === LAYOUT === */
.layout {
  display: flex; height: 100vh; overflow: hidden;
  max-width: 1200px; margin: 0 auto;
  box-shadow: 0 0 0 1px var(--border);
  background: var(--main-bg);
}

/* === SIDEBAR === */
.sidebar {
  background: var(--sidebar-bg);
  border-right: 1px solid var(--sidebar-border);
  display: flex; flex-direction: column;
  width: 260px; min-width: 0; flex-shrink: 0;
  padding: 12px 8px;
  overflow: hidden;
  transition: width 220ms ease, padding 220ms ease, border-color 220ms ease;
}
.sidebar.collapsed {
  width: 0;
  padding-left: 0;
  padding-right: 0;
  border-right-color: transparent;
}

.sidebar-top { display: flex; align-items: center; gap: 8px; padding: 4px 8px 12px; }
.sidebar-close { display: flex; }

.brand { display: flex; align-items: center; gap: 8px; padding: 4px 8px; }
.brand-icon { font-size: 1.3rem; background: linear-gradient(90deg, var(--aurora-start), var(--aurora-mid)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.brand-name { font-size: 1.1rem; font-weight: 600; color: var(--text-primary); letter-spacing: -0.02em; }

.new-chat-btn {
  display: flex; align-items: center; gap: 8px;
  width: 100%; padding: 10px 16px; margin: 4px 0 12px;
  background: var(--main-bg); border: 1px solid var(--composer-border);
  border-radius: var(--radius-lg); color: var(--primary);
  font-family: var(--font); font-size: 0.9rem; font-weight: 600;
  cursor: pointer; transition: background var(--transition), box-shadow var(--transition);
}
.new-chat-btn:hover { background: var(--surface-hover); box-shadow: 0 2px 8px rgba(26,115,232,0.12); }
.new-chat-icon { background: linear-gradient(90deg, var(--aurora-start), var(--aurora-mid)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; font-size: 1.1rem; }

.sidebar-search-wrap { position: relative; margin: 0 4px 8px; }
.sidebar-search-wrap .search-icon { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); font-size: 0.8rem; pointer-events: none; opacity: 0.5; }
#sessions-search { width: 100%; padding: 8px 12px 8px 30px; background: rgba(255,255,255,0.7); border: 1px solid var(--sidebar-border); border-radius: 20px; font-family: var(--font); font-size: 0.82rem; color: var(--text-primary); outline: none; transition: border-color var(--transition); }
#sessions-search:focus { border-color: var(--primary); background: white; }

.sidebar-section-label { font-size: 0.72rem; font-weight: 600; color: var(--text-secondary); padding: 4px 12px 4px; text-transform: uppercase; letter-spacing: 0.06em; }

#sessions-list { list-style: none; padding: 0; margin: 0; overflow-y: auto; flex: 1; display: flex; flex-direction: column; gap: 2px; }

.session-item { position: relative; display: flex; align-items: center; border-radius: var(--radius-md); overflow: hidden; }
.session-item:hover { background: rgba(26,115,232,0.08); }
.session-item:hover .session-item-actions { opacity: 1; }

.session-select {
  flex: 1; min-width: 0; text-align: left; background: transparent; border: none;
  padding: 9px 12px; cursor: pointer; font-family: var(--font); font-size: 0.875rem; color: var(--text-primary);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; border-radius: var(--radius-md);
  transition: color var(--transition);
}
.session-select.active { color: var(--primary); font-weight: 600; }
.session-item:has(.session-select.active) { background: var(--surface-hover); }

.session-rename-input {
  flex: 1; min-width: 0; border: 1px solid var(--primary);
  border-radius: var(--radius-sm); padding: 6px 10px 6px 14px;
  background: var(--main-bg); color: var(--text-primary);
  font-family: var(--font); font-size: 0.875rem; outline: none;
  box-shadow: 0 0 0 3px rgba(26,115,232,0.15);
  margin-left: 4px;
}

.session-item-actions { display: flex; gap: 2px; padding-right: 6px; opacity: 0; transition: opacity var(--transition); }
.session-action-btn { border: none; background: transparent; border-radius: 8px; padding: 4px 6px; cursor: pointer; color: var(--text-secondary); font-size: 0.85rem; transition: background var(--transition), color var(--transition); }
.session-action-btn:hover { background: rgba(0,0,0,0.08); color: var(--text-primary); }
.session-action-btn.delete:hover { background: #FDECEA; color: #C62828; }

/* === MAIN === */
.chat-main { display: flex; flex-direction: column; height: 100vh; overflow: hidden; background: var(--main-bg); position: relative; flex: 1; min-width: 0; }

/* === TOPBAR === */
.topbar { display: flex; align-items: center; padding: 8px 16px; gap: 8px; min-height: 52px; background: rgba(255,255,255,0.92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); z-index: 10; flex-shrink: 0; }
.menu-btn { display: flex; }
.topbar-brand { font-size: 1rem; font-weight: 700; background: linear-gradient(90deg, var(--aurora-start), var(--aurora-mid)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.topbar-session { font-size: 0.8rem; color: var(--text-secondary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 300px; }
.topbar-spacer { flex: 1; }

/* === USER MENU === */
.user-menu { position: relative; }

.user-menu-trigger {
  display: flex; align-items: center; gap: 8px;
  background: none; border: none; cursor: pointer;
  padding: 4px 10px 4px 4px; border-radius: 20px;
  font-family: var(--font);
  transition: background var(--transition);
}
.user-menu-trigger:hover { background: var(--surface); }

.user-avatar {
  width: 28px; height: 28px; border-radius: 50%; flex-shrink: 0;
}
.user-avatar-img { object-fit: cover; display: block; }
.user-avatar-img.hidden { display: none; }
.user-avatar-fallback {
  background: linear-gradient(135deg, var(--aurora-start), var(--aurora-mid));
  display: flex; align-items: center; justify-content: center;
  font-size: 0.72rem; font-weight: 700; color: white;
  letter-spacing: 0;
}
.user-avatar-fallback.hidden { display: none; }

.user-display-name {
  font-size: 0.85rem; color: var(--text-secondary);
  max-width: 110px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

.user-menu-dropdown {
  position: absolute; right: 0; top: calc(100% + 6px);
  background: var(--main-bg); border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 24px rgba(0,0,0,0.12);
  min-width: 200px; max-width: max-content; z-index: 50;
  animation: fadeInUp 0.12s ease both;
}
.user-menu-dropdown.hidden { display: none; }

.user-menu-info { padding: 12px 16px; text-align: right; }
.user-menu-email-full { font-size: 0.8rem; color: var(--text-secondary); white-space: nowrap; }

.user-menu-divider { height: 1px; background: var(--border); }

.user-menu-item {
  display: block; width: 100%; padding: 10px 16px;
  background: none; border: none; cursor: pointer;
  font-family: var(--font); font-size: 0.88rem;
  color: var(--text-primary); text-align: right;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  transition: background var(--transition), color var(--transition);
}
.user-menu-item:hover { background: var(--surface); }
.logout-item { color: #ef5350; }
.logout-item:hover { background: #FDECEA; color: #C62828; }

[data-theme="dark"] .user-menu-dropdown { box-shadow: 0 4px 24px rgba(0,0,0,0.4); }
[data-theme="dark"] .logout-item:hover { background: rgba(198,40,40,0.2); color: #ef9a9a; }

/* === MESSAGES === */
.messages { flex: 1; overflow-y: auto; padding: 24px 16px; scroll-behavior: smooth; }
.messages-inner { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 24px; }

.bubble { max-width: 100%; animation: fadeInUp 0.2s ease both; }

@keyframes fadeInUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* User bubble */
.bubble.user { display: flex; justify-content: flex-end; }
.bubble.user .bubble-body {
  max-width: min(85%, 640px);
  background: var(--bubble-user); border: 1px solid var(--bubble-user-border);
  border-radius: 18px 18px 4px 18px; padding: 12px 16px;
  font-size: 0.93rem; line-height: 1.55; color: var(--text-primary);
}

/* Assistant bubble */
.bubble.assistant { display: flex; gap: 12px; align-items: flex-start; }
.bubble-avatar { width: 32px; height: 32px; border-radius: 50%; background: linear-gradient(135deg, var(--aurora-start), var(--aurora-mid)); display: flex; align-items: center; justify-content: center; font-size: 1rem; flex-shrink: 0; color: white; font-weight: 600; }
.bubble.assistant .bubble-body { flex: 1; min-width: 0; }

.bubble .content { font-size: 0.93rem; line-height: 1.65; color: var(--text-primary); }
.bubble .content p { margin: 0 0 0.6em; }
.bubble .content p:last-child { margin-bottom: 0; }
.bubble .content pre { margin: 0.5em 0; padding: 12px 14px; border-radius: var(--radius-sm); background: var(--surface); border: 1px solid var(--border); overflow-x: auto; font-size: 0.84rem; }
.bubble .content code { font-family: 'Roboto Mono', Consolas, Monaco, monospace; font-size: 0.88em; background: var(--surface); padding: 1px 5px; border-radius: 4px; }
.bubble .content pre code { background: none; padding: 0; font-size: 1em; }
.bubble .content ul, .bubble .content ol { margin: 0.4em 0 0.4em 1.2em; padding: 0; }
.bubble .content li { margin-bottom: 0.25em; }
.bubble .content a { color: var(--primary); text-decoration: none; }
.bubble .content a:hover { text-decoration: underline; }
.bubble .content h1, .bubble .content h2, .bubble .content h3 { margin: 0.8em 0 0.4em; font-weight: 600; line-height: 1.3; }

.bubble .meta { margin-top: 8px; font-size: 0.7rem; color: var(--text-secondary); }

.bubble .metrics { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 6px; }
.meta-pill { display: inline-flex; align-items: center; background: var(--surface); border: 1px solid var(--border); border-radius: 999px; font-size: 0.68rem; color: var(--text-secondary); padding: 2px 8px; }

.bubble details { margin-top: 8px; }
.bubble details summary { display: inline-flex; align-items: center; gap: 4px; font-size: 0.72rem; cursor: pointer; background: var(--surface); border: 1px solid var(--border); border-radius: 999px; padding: 3px 10px; color: var(--text-secondary); list-style: none; transition: background var(--transition); user-select: none; }
.bubble details summary:hover { background: var(--surface-hover); color: var(--primary); }
.bubble details[open] summary { background: var(--surface-hover); color: var(--primary); }

.tool-usage-item { margin-top: 8px; padding: 8px 10px; border-radius: var(--radius-sm); background: var(--surface); border: 1px solid var(--border); }
.tool-usage-name { font-size: 0.78rem; font-weight: 600; color: var(--text-primary); margin-bottom: 4px; }
.tool-usage-item pre { margin: 4px 0 0; padding: 6px 8px; border-radius: 4px; background: rgba(0,0,0,0.05); font-size: 0.72rem; overflow-x: auto; white-space: pre-wrap; word-break: break-all; }

/* Waiting bubble */
.bubble.waiting .bubble-body { background: none; border: none; padding: 4px 0; }
.thinking-dots { display: inline-flex; gap: 5px; align-items: center; padding: 8px 4px; }
.thinking-dots span { width: 7px; height: 7px; border-radius: 50%; background: linear-gradient(135deg, var(--aurora-start), var(--aurora-mid)); opacity: 0.3; animation: pulse 1.2s infinite ease-in-out; }
.thinking-dots span:nth-child(2) { animation-delay: 0.2s; }
.thinking-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes pulse { 0%, 100% { opacity: 0.2; transform: scale(0.8); } 50% { opacity: 1; transform: scale(1); } }

/* === WELCOME SCREEN === */
.welcome-screen { position: absolute; inset: 52px 0 0 0; display: flex; align-items: center; justify-content: center; pointer-events: none; z-index: 1; }
.welcome-screen.hidden { display: none; }
.welcome-content { text-align: center; padding: 24px; pointer-events: auto; max-width: 640px; }
.welcome-heading { margin: 0 0 8px; font-size: 2.4rem; font-weight: 700; background: linear-gradient(135deg, var(--aurora-start) 0%, var(--aurora-mid) 50%, var(--aurora-end) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1.1; }
.welcome-sub { margin: 0 0 32px; font-size: 1.1rem; color: var(--text-secondary); font-weight: 400; }
.welcome-suggestions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.welcome-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 14px 16px; text-align: left; cursor: pointer; font-family: var(--font); font-size: 0.85rem; color: var(--text-primary); line-height: 1.4; transition: background var(--transition), box-shadow var(--transition); }
.welcome-card:hover { background: var(--surface-hover); box-shadow: 0 2px 12px rgba(26,115,232,0.1); border-color: var(--composer-border); }

/* === COMPOSER === */
.composer-wrap { flex-shrink: 0; padding: 8px 16px 12px; background: linear-gradient(to bottom, transparent, var(--main-bg) 20%); position: relative; }

.prompt-suggestions { margin-bottom: 8px; }
.prompt-suggestions summary {
  display: inline-flex; align-items: center; gap: 6px;
  list-style: none; cursor: pointer; user-select: none;
  font-size: 0.78rem; font-weight: 500; color: var(--text-secondary);
  padding: 5px 12px; border: 1px solid var(--composer-border);
  border-radius: 999px; background: var(--main-bg);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.prompt-suggestions summary::-webkit-details-marker { display: none; }
.prompt-suggestions summary::before { content: '✦'; font-size: 0.7rem; opacity: 0.7; }
.prompt-suggestions summary::after { content: '▾'; font-size: 0.65rem; transition: transform var(--transition); }
.prompt-suggestions[open] summary::after { transform: rotate(-180deg); }
.prompt-suggestions summary:hover { background: var(--surface-hover); color: var(--primary); border-color: var(--primary); }
.prompt-suggestions[open] summary { background: var(--surface-hover); color: var(--primary); border-color: var(--primary); }
.prompt-suggestions-list {
  display: flex; flex-wrap: wrap; gap: 6px;
  padding: 8px 4px 2px;
  animation: fadeInUp 0.15s ease both;
}
.suggestion-chip { border: 1px solid var(--composer-border); background: var(--main-bg); color: var(--text-primary); border-radius: 999px; font-size: 0.78rem; padding: 5px 12px; cursor: pointer; font-family: var(--font); transition: background var(--transition), border-color var(--transition), color var(--transition); }
.suggestion-chip:hover { background: var(--surface-hover); border-color: var(--primary); color: var(--primary); }

.composer { max-width: 760px; margin: 0 auto; }
.composer-inner {
  display: flex; align-items: flex-end; gap: 8px;
  background: var(--main-bg); border: 1.5px solid var(--composer-border);
  border-radius: var(--radius-lg); padding: 10px 12px 10px 16px;
  box-shadow: 0 2px 16px rgba(0,0,0,0.08);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.composer-inner:focus-within { border-color: var(--primary); box-shadow: 0 2px 20px rgba(26,115,232,0.14); }

#chat-input {
  flex: 1; border: none; outline: none; resize: none;
  font-family: var(--font); font-size: 0.93rem; color: var(--text-primary);
  background: transparent; line-height: 1.55;
  max-height: 200px; overflow-y: auto;
}
#chat-input::placeholder { color: var(--text-placeholder); }

.composer-actions { display: flex; align-items: center; gap: 4px; flex-shrink: 0; }

.icon-btn { background: transparent; border: none; cursor: pointer; border-radius: 50%; width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; color: var(--text-secondary); font-size: 1.1rem; transition: background var(--transition), color var(--transition); padding: 0; }
.icon-btn:hover { background: var(--surface); color: var(--text-primary); }

.attach-btn { cursor: pointer; }
.attach-btn input[type="file"] { display: none; }

.send-btn {
  width: 36px; height: 36px; border-radius: 50%; border: none;
  background: var(--surface); color: var(--text-secondary);
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: all var(--transition); padding: 0; flex-shrink: 0;
}
.send-btn:not(:disabled) { background: linear-gradient(135deg, var(--aurora-start), var(--aurora-mid)); color: white; }
.send-btn:not(:disabled):hover { box-shadow: 0 2px 10px rgba(26,115,232,0.3); transform: scale(1.05); }
.send-btn:disabled { cursor: default; opacity: 0.5; }

.files-preview { display: flex; flex-wrap: wrap; gap: 6px; padding: 0 4px; margin-top: 6px; }
.file-chip { display: flex; align-items: center; gap: 6px; background: var(--surface); border: 1px solid var(--border); border-radius: 20px; padding: 4px 10px; font-size: 0.78rem; color: var(--text-primary); }
.file-chip-remove { background: none; border: none; cursor: pointer; color: var(--text-secondary); font-size: 1rem; line-height: 1; padding: 0 2px; opacity: 0.6; flex-shrink: 0; }
.file-chip-remove:hover { opacity: 1; color: var(--text-primary); }

.composer-disclaimer { text-align: center; font-size: 0.72rem; color: var(--text-secondary); margin: 6px 0 0; }

/* === SIDEBAR OVERLAY (mobile) === */
.sidebar-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 99; opacity: 0; transition: opacity var(--transition); }
.sidebar-overlay.visible { opacity: 1; display: block; }

/* === DARK MODE === */
[data-theme="dark"] {
  --primary: #8AB4F8;
  --primary-hover: #aecbfa;
  --sidebar-bg: #1C2333;
  --sidebar-border: #2D3748;
  --main-bg: #131314;
  --surface: #1E2130;
  --surface-hover: #263048;
  --text-primary: #E8EAED;
  --text-secondary: #9AA0A6;
  --text-placeholder: #5F6368;
  --border: #2D3748;
  --composer-border: #3C4759;
  --bubble-user: #1A3A5C;
  --bubble-user-border: #2A5080;
}

[data-theme="dark"] .topbar {
  background: rgba(19,19,20,0.94);
}

[data-theme="dark"] #sessions-search {
  background: rgba(255,255,255,0.06);
  color: var(--text-primary);
}
[data-theme="dark"] #sessions-search:focus {
  background: rgba(255,255,255,0.1);
}

[data-theme="dark"] .new-chat-btn {
  background: rgba(255,255,255,0.06);
}
[data-theme="dark"] .new-chat-btn:hover {
  background: var(--surface-hover);
}

[data-theme="dark"] .session-action-btn:hover {
  background: rgba(255,255,255,0.1);
}
[data-theme="dark"] .session-action-btn.delete:hover {
  background: rgba(198,40,40,0.25);
  color: #ef9a9a;
}

[data-theme="dark"] .composer-inner {
  box-shadow: 0 2px 16px rgba(0,0,0,0.4);
}

[data-theme="dark"] .tool-usage-item pre {
  background: rgba(255,255,255,0.05);
}

[data-theme="dark"] .welcome-card:hover {
  box-shadow: 0 2px 12px rgba(138,180,248,0.12);
}

/* Auto dark (system preference, only when no manual override) */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]):not([data-theme="dark"]) {
    --primary: #8AB4F8;
    --primary-hover: #aecbfa;
    --sidebar-bg: #1C2333;
    --sidebar-border: #2D3748;
    --main-bg: #131314;
    --surface: #1E2130;
    --surface-hover: #263048;
    --text-primary: #E8EAED;
    --text-secondary: #9AA0A6;
    --text-placeholder: #5F6368;
    --border: #2D3748;
    --composer-border: #3C4759;
    --bubble-user: #1A3A5C;
    --bubble-user-border: #2A5080;
  }
  :root:not([data-theme="light"]):not([data-theme="dark"]) .topbar { background: rgba(19,19,20,0.94); }
  :root:not([data-theme="light"]):not([data-theme="dark"]) #sessions-search { background: rgba(255,255,255,0.06); color: var(--text-primary); }
  :root:not([data-theme="light"]):not([data-theme="dark"]) #sessions-search:focus { background: rgba(255,255,255,0.1); }
  :root:not([data-theme="light"]):not([data-theme="dark"]) .new-chat-btn { background: rgba(255,255,255,0.06); }
  :root:not([data-theme="light"]):not([data-theme="dark"]) .new-chat-btn:hover { background: var(--surface-hover); }
}

/* === THEME TOGGLE BUTTON === */
.theme-toggle-btn { font-size: 1.1rem; }

/* === LOGIN SCREEN === */
.login-screen {
  position: fixed; inset: 0; z-index: 200;
  background: var(--main-bg);
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
}
.login-screen.hidden { display: none; }

.login-card {
  width: 100%; max-width: 400px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.18);
}

.login-brand {
  display: flex; align-items: center; gap: 10px; margin-bottom: 4px;
}
.login-brand .brand-icon {
  background: linear-gradient(135deg, var(--aurora-start), var(--aurora-mid));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.login-brand .brand-name { font-weight: 700; color: var(--text-primary); }

.login-sub { margin: 0 0 20px; font-size: 0.88rem; color: var(--text-secondary); text-align: center; }

.login-form { width: 100%; display: flex; flex-direction: column; gap: 10px; }

.login-input {
  width: 100%; padding: 12px 16px;
  background: var(--main-bg); border: 1.5px solid var(--composer-border);
  border-radius: var(--radius-md); color: var(--text-primary);
  font-family: var(--font); font-size: 0.95rem; outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.login-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,115,232,0.15);
}
.login-input::placeholder { color: var(--text-placeholder); }

.login-btn {
  width: 100%; padding: 12px;
  background: linear-gradient(135deg, var(--aurora-start), var(--aurora-mid));
  border: none; border-radius: var(--radius-md);
  color: #fff; font-family: var(--font); font-size: 0.95rem; font-weight: 600;
  cursor: pointer; transition: opacity var(--transition), box-shadow var(--transition);
}
.login-btn:hover { opacity: 0.92; box-shadow: 0 4px 16px rgba(66,133,244,0.3); }

#g_id_signin { position: absolute; left: -9999px; top: -9999px; }

.google-login-btn {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  margin-top: 8px;
}

.login-error {
  margin: 4px 0 0; font-size: 0.82rem; color: #ef5350; text-align: center;
}
.login-error.hidden { display: none; }

/* === DELETE CONFIRM DIALOG === */
.delete-dialog-overlay {
  position: fixed; inset: 0; z-index: 300;
  background: rgba(0,0,0,0.45);
  backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  animation: overlayFadeIn 150ms ease;
}
.delete-dialog-overlay.hidden { display: none; }

@keyframes overlayFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.delete-dialog {
  background: var(--main-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 28px 24px;
  max-width: 340px; width: 100%;
  box-shadow: 0 8px 40px rgba(0,0,0,0.18);
  animation: dialogSlideIn 150ms ease;
}

@keyframes dialogSlideIn {
  from { opacity: 0; transform: scale(0.95) translateY(-8px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.delete-dialog-header {
  display: flex; flex-direction: row; flex-wrap: nowrap; align-items: center; gap: 12px;
  margin-bottom: 8px;
}

.delete-dialog-icon {
  font-size: 1.4rem;
  width: 40px; height: 40px;
  background: #FDECEA;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}

.delete-dialog-title {
  margin: 0; min-width: 0;
  font-size: 1.05rem; font-weight: 600;
  color: var(--text-primary);
}

.delete-dialog-desc {
  margin: 0 0 24px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.delete-dialog-actions {
  display: flex; gap: 10px;
}

.delete-dialog-btn {
  flex: 1; padding: 10px 16px;
  border: none; border-radius: var(--radius-md);
  font-family: var(--font); font-size: 0.9rem; font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), box-shadow var(--transition);
}

.delete-dialog-btn.cancel {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-primary);
}
.delete-dialog-btn.cancel:hover { background: var(--surface-hover); }

.delete-dialog-btn.confirm {
  background: #C62828;
  color: #fff;
}
.delete-dialog-btn.confirm:hover {
  background: #B71C1C;
  box-shadow: 0 4px 12px rgba(198,40,40,0.3);
}

[data-theme="dark"] .delete-dialog-icon { background: rgba(198,40,40,0.2); }
[data-theme="dark"] .delete-dialog-btn.cancel {
  background: rgba(255,255,255,0.06);
  border-color: var(--border);
}
[data-theme="dark"] .delete-dialog-btn.cancel:hover { background: rgba(255,255,255,0.1); }

/* === SCROLLBAR === */
* { scrollbar-width: thin; scrollbar-color: #CBD5E1 transparent; }
[data-theme="dark"] * { scrollbar-color: #3C4759 transparent; }
*::-webkit-scrollbar { width: 5px; }
*::-webkit-scrollbar-thumb { background: #CBD5E1; border-radius: 99px; }
[data-theme="dark"] *::-webkit-scrollbar-thumb { background: #3C4759; }

/* === RESPONSIVE === */
@media (max-width: 680px) {
  /* Na mobile sidebar wychodzi jako overlay */
  .sidebar {
    position: fixed; left: 0; top: 0; bottom: 0;
    width: 280px !important; padding: 12px 8px !important;
    border-right-color: var(--sidebar-border) !important;
    z-index: 100; transform: translateX(-100%);
    transition: transform 220ms ease;
    box-shadow: 4px 0 20px rgba(0,0,0,0.15);
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar.collapsed { width: 280px !important; transform: translateX(-100%); }
  .sidebar.collapsed.open { transform: translateX(0); }
  .bubble.user .bubble-body { max-width: 92%; }
  .welcome-suggestions { grid-template-columns: 1fr; }
  .mode-switch .mode-btn { padding: 6px 10px; font-size: 0.8rem; }
  .plan-table { font-size: 0.78rem; }
}

/* === Plan produkcyjny view (główny widok) === */
.plan-view { flex: 1; overflow-y: auto; min-height: 0; }

.plan-inner { max-width: 1100px; margin: 0 auto; padding: 32px 24px 64px; }
.plan-header { text-align: center; margin-bottom: 28px; }
.plan-title { font-size: 1.6rem; font-weight: 600; color: var(--text-primary); margin: 0 0 8px; }
.plan-sub { color: var(--text-secondary); font-size: 0.95rem; margin: 0; }

.plan-dropzone {
  border: 2px dashed var(--composer-border);
  border-radius: var(--radius-md);
  background: var(--surface);
  padding: 36px 24px;
  text-align: center;
  transition: border-color var(--transition), background var(--transition);
}
.plan-dropzone.dragover { border-color: var(--primary); background: var(--surface-hover); }
.plan-dropzone-icon { font-size: 2.4rem; margin-bottom: 10px; }
.plan-dropzone-text { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.plan-pick-btn {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 10px 20px;
  cursor: pointer;
  transition: background var(--transition);
}
.plan-pick-btn:hover { background: var(--primary-hover); }
.plan-dropzone-hint { color: var(--text-placeholder); font-size: 0.85rem; }
.plan-filename { margin-top: 14px; color: var(--text-primary); font-size: 0.9rem; font-weight: 500; }

.plan-actions { display: flex; justify-content: center; margin: 22px 0; }
.plan-generate-btn {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 28px;
  cursor: pointer;
  transition: background var(--transition), opacity var(--transition);
}
.plan-generate-btn:hover:not(:disabled) { background: var(--primary-hover); }
.plan-generate-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.plan-status {
  display: flex; align-items: center; gap: 10px; justify-content: center;
  padding: 14px 18px; border-radius: var(--radius-sm);
  font-size: 0.9rem; margin-bottom: 20px;
}
.plan-status.loading { background: var(--surface); color: var(--text-secondary); }
.plan-status.error { background: #FDECEA; color: #B3261E; }
.plan-spinner {
  width: 16px; height: 16px; border-radius: 50%;
  border: 2px solid var(--text-placeholder); border-top-color: var(--primary);
  animation: plan-spin 0.7s linear infinite; display: inline-block;
}
@keyframes plan-spin { to { transform: rotate(360deg); } }

.plan-result-bar {
  display: flex; justify-content: space-between; align-items: flex-end; gap: 16px;
  flex-wrap: wrap; margin-bottom: 14px;
}
.plan-meta { display: flex; flex-direction: column; gap: 2px; font-size: 0.85rem; color: var(--text-secondary); }
.plan-meta strong { color: var(--text-primary); font-size: 1rem; }
.plan-download-btn {
  background: var(--primary); color: #fff; border: none; border-radius: var(--radius-sm);
  font-family: var(--font); font-size: 0.9rem; font-weight: 600; padding: 10px 18px; cursor: pointer;
  transition: background var(--transition); white-space: nowrap;
}
.plan-download-btn:hover { background: var(--primary-hover); }

.plan-table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-sm); }
.plan-table { border-collapse: collapse; width: 100%; font-size: 0.82rem; }
.plan-table th, .plan-table td {
  border-bottom: 1px solid var(--border); padding: 8px 10px; text-align: left; vertical-align: top;
}
.plan-table th {
  background: var(--surface); color: var(--text-secondary); font-weight: 600;
  position: sticky; top: 0; white-space: nowrap;
}
.plan-table td { color: var(--text-primary); }
.plan-table tbody tr:hover, .plan-table tr:hover { background: var(--surface-hover); }
.plan-table a { color: var(--primary); }

/* === Główny widok — dopracowanie === */
.plan-upload-card {
  max-width: 620px; margin: 0 auto;
  background: var(--main-bg); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 22px; box-shadow: 0 2px 12px rgba(0,0,0,0.05);
}
.plan-upload-card.hidden { display: none; }

.plan-generate-btn.loading { position: relative; color: transparent; }
.plan-generate-btn.loading::after {
  content: ''; position: absolute; inset: 0; margin: auto; width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,0.5); border-top-color: #fff; border-radius: 50%;
  animation: plan-spin 0.7s linear infinite;
}

.plan-result-buttons { display: flex; gap: 8px; align-items: center; }
.plan-reset-btn {
  background: transparent; color: var(--text-secondary); border: 1px solid var(--border);
  border-radius: var(--radius-sm); font-family: var(--font); font-size: 0.9rem; font-weight: 500;
  padding: 10px 16px; cursor: pointer; transition: background var(--transition), color var(--transition); white-space: nowrap;
}
.plan-reset-btn:hover { background: var(--surface-hover); color: var(--text-primary); }
.plan-result-bar { position: sticky; top: 0; background: var(--main-bg); z-index: 2; padding-top: 4px; }
.plan-table tbody tr:nth-child(even) { background: color-mix(in srgb, var(--surface) 45%, transparent); }

/* === Pływający widget wsparcia === */
.chat-launcher {
  display: none; position: fixed; right: 24px; bottom: 24px; z-index: 60;
  width: 56px; height: 56px; border-radius: 50%; border: none; cursor: pointer;
  background: var(--primary); color: #fff; align-items: center; justify-content: center;
  box-shadow: 0 6px 20px rgba(0,0,0,0.25); transition: transform var(--transition), background var(--transition);
}
body.logged-in .chat-launcher { display: flex; }
.chat-launcher:hover { background: var(--primary-hover); transform: translateY(-2px); }
.chat-launcher.active { background: var(--primary-hover); }

.chat-widget {
  position: fixed; right: 24px; bottom: 92px; z-index: 60;
  width: 380px; max-width: calc(100vw - 32px); height: 560px; max-height: calc(100vh - 130px);
  display: flex; flex-direction: column; overflow: hidden;
  background: var(--main-bg); border: 1px solid var(--border); border-radius: var(--radius-lg);
  box-shadow: 0 12px 40px rgba(0,0,0,0.28);
  animation: chat-pop 160ms ease;
}
@keyframes chat-pop { from { opacity: 0; transform: translateY(12px) scale(0.98); } to { opacity: 1; transform: none; } }

.chat-widget-head {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 12px 14px; border-bottom: 1px solid var(--border);
  background: linear-gradient(90deg, var(--aurora-start), var(--aurora-mid)); color: #fff;
}
.chat-widget-title { display: flex; align-items: center; gap: 10px; }
.chat-widget-avatar {
  width: 34px; height: 34px; border-radius: 50%; background: rgba(255,255,255,0.22);
  display: flex; align-items: center; justify-content: center; font-size: 1.1rem;
}
.chat-widget-name { font-size: 0.95rem; font-weight: 600; }
.chat-widget-status { font-size: 0.75rem; opacity: 0.9; }
.chat-widget-actions { display: flex; align-items: center; gap: 4px; }
.chat-widget-btn {
  border: none; background: rgba(255,255,255,0.16); color: #fff;
  font-family: var(--font); font-size: 0.75rem; cursor: pointer; padding: 5px 9px; border-radius: 6px;
  transition: background var(--transition);
}
.chat-widget-btn:hover { background: rgba(255,255,255,0.3); }

.chat-widget-messages { flex: 1; overflow-y: auto; padding: 14px; display: flex; flex-direction: column; gap: 10px; }
.chat-empty { margin: auto; text-align: center; color: var(--text-secondary); padding: 16px; }
.chat-empty-icon { font-size: 2rem; margin-bottom: 8px; }
.chat-empty p { font-size: 0.86rem; line-height: 1.5; margin: 0; }

.chat-msg { font-size: 0.88rem; line-height: 1.5; border-radius: var(--radius-md); padding: 9px 12px; max-width: 90%; word-wrap: break-word; }
.chat-msg.chat-user { align-self: flex-end; background: var(--bubble-user); border: 1px solid var(--bubble-user-border); color: var(--text-primary); }
.chat-msg.chat-assistant { align-self: flex-start; background: var(--surface); color: var(--text-primary); }
.chat-msg.chat-waiting { display: flex; align-items: center; gap: 8px; color: var(--text-secondary); }
.chat-msg a { color: var(--primary); }
.chat-msg pre { background: var(--main-bg); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 8px; overflow-x: auto; }
.chat-msg ul { margin: 6px 0; padding-left: 18px; }

.chat-widget-form { display: flex; align-items: flex-end; gap: 8px; padding: 10px 12px 4px; border-top: 1px solid var(--border); }
.chat-widget-form textarea {
  flex: 1; border: 1px solid var(--composer-border); outline: none; resize: none;
  background: var(--main-bg); color: var(--text-primary); font-family: var(--font);
  font-size: 0.9rem; line-height: 1.5; max-height: 120px; padding: 9px 12px; border-radius: var(--radius-md);
}
.chat-widget-form textarea:focus { border-color: var(--primary); }
.chat-widget-form textarea::placeholder { color: var(--text-placeholder); }
.chat-widget-form .send-btn {
  flex-shrink: 0; width: 38px; height: 38px; border: none; border-radius: 50%;
  background: var(--primary); color: #fff; cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: background var(--transition), opacity var(--transition);
}
.chat-widget-form .send-btn:hover:not(:disabled) { background: var(--primary-hover); }
.chat-widget-form .send-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.chat-widget-disclaimer { text-align: center; font-size: 0.68rem; color: var(--text-placeholder); margin: 4px 0 10px; }

@media (max-width: 480px) {
  .chat-widget { right: 8px; left: 8px; bottom: 84px; width: auto; height: calc(100vh - 110px); }
  .chat-launcher { right: 16px; bottom: 16px; }
}