:root {
    --bg-main: #ffffff;
    --bg-sidebar: #f9f9f9;
    --bg-hover: #ececf1;
    --bg-active: #e8e8ed;
    --border-subtle: #e5e5ea;
    --text-primary: #0d0d0d;
    --text-muted: #6e6e73;
    --user-msg-bg: #f4f4f6;
    --focus-ring: #3b82f6;
    --radius-main: 8px;
    --shadow-popup: 0 8px 24px rgba(0, 0, 0, 0.08);
    --chip-bg: #eaeaea;
}

body.dark-mode {
    --bg-main: #212121;
    --bg-sidebar: #171717;
    --bg-hover: #2a2a2a;
    --bg-active: #333333;
    --border-subtle: #2e2e2e;
    --text-primary: #ececec;
    --text-muted: #8e8e93;
    --user-msg-bg: #2f2f2f;
    --focus-ring: #60a5fa;
    --shadow-popup: 0 8px 24px rgba(0, 0, 0, 0.4);
    --chip-bg: #2d2d2d;
}

/* PREMIUM CUSTOM TEXT SELECTION */
::selection { background: rgba(59, 130, 246, 0.25); color: #0d0d0d; }
::-moz-selection { background: rgba(59, 130, 246, 0.25); color: #0d0d0d; }
body.dark-mode ::selection { background: rgba(96, 165, 250, 0.35); color: #ffffff; }
body.dark-mode ::-moz-selection { background: rgba(96, 165, 250, 0.35); color: #ffffff; }

* { 
    box-sizing: border-box; 
    margin: 0; 
    padding: 0; 
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; 
    -webkit-tap-highlight-color: transparent; 
}

*:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; border-radius: 4px; }
svg.lucide { stroke-width: 1.75px; }

body { 
    background-color: var(--bg-main); 
    color: var(--text-primary); 
    height: 100vh; 
    display: flex; 
    overflow: hidden; 
    font-size: 14px; 
    line-height: 1.5; 
}

/* SIDEBAR LAYOUT */
.sidebar { 
    width: 260px; 
    background-color: var(--bg-sidebar); 
    display: flex; 
    flex-direction: column; 
    height: 100%; 
    z-index: 50; 
    flex-shrink: 0; 
    transition: margin-left 0.2s ease, transform 0.2s ease; 
}

@media (min-width: 768px) { 
    .sidebar.collapsed { margin-left: -260px; visibility: hidden; } 
}

body:not(.sidebar-collapsed) #sidebarToggleBtn { display: none !important; }
body.sidebar-collapsed #sidebarToggleBtn { display: flex !important; }

@media (max-width: 767px) { 
    .sidebar { position: fixed; left: 0; top: 0; bottom: 0; } 
    .sidebar.collapsed { transform: translateX(-100%); } 
    body:not(.sidebar-collapsed) #sidebarToggleBtn { display: flex !important; } 
}

.sidebar-scrim { 
    position: fixed; 
    inset: 0; 
    background: rgba(0, 0, 0, 0.3); 
    opacity: 0; 
    pointer-events: none; 
    transition: opacity 0.2s ease; 
    z-index: 40; 
}
.sidebar-scrim.visible { opacity: 1; pointer-events: auto; }
@media (min-width: 768px) { .sidebar-scrim { display: none !important; } }

.sidebar-header { padding: 12px 14px; display: flex; align-items: center; justify-content: space-between; height: 52px; }
.brand-button { background: transparent; border: none; display: flex; align-items: center; gap: 10px; cursor: pointer; text-align: left; color: var(--text-primary); padding: 4px; border-radius: var(--radius-main); }
.brand-copy strong { display: block; font-size: 14.5px; font-weight: 600; letter-spacing: -0.2px; }
.brand-copy small { display: block; font-size: 11px; color: var(--text-muted); }
.icon-btn { background: transparent; border: none; color: var(--text-muted); padding: 6px; border-radius: var(--radius-main); cursor: pointer; display: flex; align-items: center; justify-content: center; transition: all 0.15s ease; }

.sidebar-content { flex: 1; overflow-y: auto; padding: 4px 10px 10px 10px; }
.new-chat-btn { width: 100%; padding: 9px 10px; border-radius: var(--radius-main); background: transparent; border: none; color: var(--text-primary); font-size: 13.5px; font-weight: 500; display: flex; align-items: center; cursor: pointer; transition: all 0.15s ease; margin-bottom: 20px; }
.new-chat-btn .btn-inner { display: flex; align-items: center; gap: 10px; }
.section-title { font-size: 11px; font-weight: 600; color: var(--text-muted); padding: 0 10px 8px 10px; display: block; }

.history-item { position: relative; display: flex; align-items: center; height: 38px; padding: 0 10px; border-radius: var(--radius-main); font-size: 13.5px; font-weight: 400; color: var(--text-primary); cursor: pointer; margin-bottom: 2px; transition: background 0.15s ease; }
.history-item-title { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; padding-right: 28px; }
.history-item-actions { display: none; position: absolute; right: 2px; top: 0; bottom: 0; width: 36px; align-items: center; justify-content: center; border-radius: 0 var(--radius-main) var(--radius-main) 0; background: linear-gradient(to right, transparent 0%, var(--bg-hover) 30%, var(--bg-hover) 100%); }
.history-item.active .history-item-actions { background: linear-gradient(to right, transparent 0%, var(--bg-active) 30%, var(--bg-active) 100%); }
.history-item.active .history-item-actions, .history-item:hover .history-item-actions { display: flex; }
.history-action-btn { background: transparent; border: none; color: var(--text-muted); cursor: pointer; padding: 2px 4px; border-radius: 4px; display: flex; align-items: center; justify-content: center; opacity: 0.75; transition: opacity 0.12s ease; }
.history-action-btn:hover { opacity: 1; color: var(--text-primary); }
.history-action-btn svg, .history-action-btn i { width: 14px !important; height: 14px !important; }
.history-item.active { background: var(--bg-active); font-weight: 500; }

.sidebar-footer { position: relative; padding: 10px; }
.user-profile-btn { width: 100%; display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: var(--radius-main); background: transparent; border: none; cursor: pointer; transition: background 0.15s ease; text-align: left; }
#userAvatar { width: 32px; height: 32px; position: relative; flex-shrink: 0; overflow: hidden; background-size: cover; background-position: center; background-color: var(--bg-hover); border-radius: 50%; color: var(--text-primary); font-weight: 600; font-size: 13px; display: flex; align-items: center; justify-content: center; }
#userAvatar::before { content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.35), 0 2px 8px rgba(0, 0, 0, 0.06); }
body.dark-mode #userAvatar::before { box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12), 0 2px 8px rgba(0, 0, 0, 0.25); }
.user-info { flex: 1; overflow: hidden; }
.user-name { display: block; font-size: 13px; font-weight: 500; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-badge { display: block; font-size: 10.5px; color: var(--text-muted); }
.more-icon { color: var(--text-muted); transition: color 0.15s ease; }
.user-profile-btn:hover .more-icon { color: var(--text-primary); }

/* POPUP MENUS */
.history-popup-menu, .attachment-popup-menu, .user-popup-menu { background: var(--bg-main); border: 1px solid var(--border-subtle); border-radius: 12px; box-shadow: var(--shadow-popup); padding: 5px; z-index: 10000; }
.history-popup-menu { display: none; position: fixed; width: 180px; }
.history-popup-menu.show { display: block; animation: popIn 0.12s ease forwards; }
.attachment-popup-menu { display: none; position: absolute; bottom: calc(100% + 10px); left: 0; width: 175px; }
.attachment-popup-menu.show { display: block; animation: popIn 0.12s ease forwards; }
.user-popup-menu { visibility: hidden; opacity: 0; transform: translateY(8px) scale(0.98); pointer-events: none; position: absolute; bottom: 60px; left: 10px; width: calc(100% - 20px); transition: all 0.15s ease; }
.user-popup-menu.show { visibility: visible; opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }

@keyframes popIn { from { opacity: 0; transform: translateY(3px) scale(0.98); } to { opacity: 1; transform: translateY(0) scale(1); } }
.history-popup-item, .attachment-popup-item, .popup-item { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 6px; font-size: 13px; font-weight: 500; color: var(--text-primary); cursor: pointer; transition: background 0.1s ease; }
.history-popup-item i, .attachment-popup-item i, .popup-item i { color: var(--text-muted); flex-shrink: 0; }
.history-popup-item:hover, .attachment-popup-item:hover, .popup-item:hover { background: var(--bg-hover); }
.history-popup-item.danger, .popup-item.danger { color: #ef4444; }
.history-popup-item.danger i, .popup-item.danger i { color: #ef4444; }
.attachment-popup-item.active-mode { color: #10b981; background: rgba(16, 185, 129, 0.08); }
.attachment-popup-item.active-mode i { color: #10b981 !important; }
.popup-divider { height: 1px; background: var(--border-subtle); margin: 4px 0; }

/* APP SHELL & TOP BAR */
.app-shell { flex: 1; display: flex; flex-direction: column; height: 100%; position: relative; min-width: 0; background: var(--bg-main); }
.top-bar { height: 52px; padding: 0 16px; display: flex; align-items: center; justify-content: space-between; }
.top-left, .top-right { display: flex; align-items: center; gap: 8px; }

/* FREEMIUM MODEL DROPDOWN */
.model-dropdown-wrapper { position: relative; }
.model-badge { display: flex; align-items: center; gap: 6px; padding: 6px 10px; border-radius: 8px; cursor: pointer; transition: background 0.15s ease; }
.model-name { font-size: 15.5px; font-weight: 600; color: var(--text-primary); letter-spacing: -0.2px; }
.model-chevron { color: var(--text-muted); }
.model-badge:hover { background-color: var(--bg-hover); }

.model-dropdown-menu { display: none; position: absolute; top: calc(100% + 6px); left: 0; width: 270px; background: var(--bg-main); border: 1px solid var(--border-subtle); border-radius: 14px; box-shadow: var(--shadow-popup); padding: 6px; z-index: 1000; }
.model-dropdown-menu.show { display: block; animation: popIn 0.12s ease forwards; }
.model-option { display: flex; align-items: center; justify-content: space-between; padding: 10px 12px; border-radius: 8px; cursor: pointer; transition: background 0.12s ease; }
.model-option:hover { background: var(--bg-hover); }
.model-opt-info strong { display: block; font-size: 13.5px; font-weight: 600; color: var(--text-primary); }
.model-opt-info small { display: block; font-size: 11px; color: var(--text-muted); margin-top: 1px; }
.opt-check-icon { color: var(--focus-ring); opacity: 0; }
.model-option.active .opt-check-icon { opacity: 1; }
.pro-tag { background: linear-gradient(135deg, #3b82f6, #8b5cf6); color: #ffffff; font-size: 10px; font-weight: 700; padding: 2px 7px; border-radius: 12px; letter-spacing: 0.5px; }

/* MAIN CONVERSATION AREA */
.scroll-area { flex: 1; overflow-y: auto; padding: 20px 20px 180px 20px; scroll-behavior: smooth; }
.conversation-column { max-width: 768px; margin: 0 auto; }
.hero-section { text-align: center; padding: 60px 0 30px 0; }
.hero-section h1 { font-size: 26px; font-weight: 600; margin-bottom: 8px; letter-spacing: -0.4px; }
.hero-copy { font-size: 14px; color: var(--text-muted); margin-bottom: 32px; }
.starter-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 10px; text-align: left; }
.starter-grid button { background: transparent; border: 1px solid var(--border-subtle); padding: 12px 14px; border-radius: 12px; color: var(--text-primary); cursor: pointer; display: flex; align-items: center; gap: 10px; font-size: 13.5px; font-weight: 500; transition: background 0.15s ease; }
.starter-grid button:hover { background-color: var(--bg-hover); }

/* CHAT MESSAGES & BUBBLES */
.chat-messages { display: flex; flex-direction: column; gap: 24px; }
.message { display: flex; flex-direction: column; position: relative; width: 100%; }

.message.user { align-items: flex-end; }
.message.user .message-wrapper { display: flex; flex-direction: column; align-items: flex-end; max-width: 85%; width: 100%; }
.message.user .message-content { background: var(--user-msg-bg); color: var(--text-primary); padding: 10px 16px; border-radius: 20px; font-size: 14.5px; line-height: 1.5; word-break: break-word; border: none; box-shadow: none; }
.user-msg-actions { display: flex; align-items: center; gap: 4px; margin-top: 4px; padding-right: 4px; opacity: 0; transition: opacity 0.15s ease; }
.message.user:hover .user-msg-actions { opacity: 1; }
.user-action-btn { background: transparent !important; border: none !important; outline: none !important; box-shadow: none !important; color: var(--text-muted); cursor: pointer; padding: 4px; border-radius: 6px; display: inline-flex; align-items: center; justify-content: center; transition: color 0.12s ease, background 0.12s ease; }
.user-action-btn:hover { background: var(--bg-hover) !important; color: var(--text-primary); }
.user-action-btn svg, .user-action-btn i { width: 14px !important; height: 14px !important; pointer-events: none; }

/* EDIT CONTAINER STATE */
.edit-message-box { width: 100%; display: flex; flex-direction: column; gap: 10px; background: var(--bg-sidebar); border: 1px solid var(--border-subtle); border-radius: 16px; padding: 12px; box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05); }
.edit-textarea { width: 100%; background: transparent; border: none; outline: none; color: var(--text-primary); font-size: 14.5px; resize: none; font-family: inherit; line-height: 1.5; }
.edit-actions { display: flex; align-items: center; justify-content: flex-end; gap: 8px; }
.edit-btn-cancel, .edit-btn-save { padding: 6px 14px; border-radius: 18px; font-size: 13px; font-weight: 500; cursor: pointer; border: none; transition: all 0.15s ease; }
.edit-btn-cancel { background: transparent; color: var(--text-primary); }
.edit-btn-cancel:hover { background: var(--bg-hover); }
.edit-btn-save { background: var(--text-primary); color: var(--bg-main); }
.edit-btn-save:hover { opacity: 0.85; }

/* ASSISTANT MESSAGE */
.message.assistant { align-items: flex-start; }
.message.assistant .message-content { background: transparent; padding: 0; font-size: 14.5px; line-height: 1.6; }
.message-content p { margin-bottom: 12px; }
.message-content p:last-child { margin-bottom: 0; }
.message-content ul, .message-content ol { margin: 10px 0 12px 20px; }
.message-content li { margin-bottom: 4px; }
.message-content table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 13.5px; border-radius: 8px; overflow: hidden; border: 1px solid var(--border-subtle); }
.message-content th, .message-content td { padding: 8px 12px; border: 1px solid var(--border-subtle); text-align: left; }
.message-content th { background: var(--bg-sidebar); font-weight: 600; }
.message-content pre { background: #f8f8fa; padding: 14px 16px; border-radius: 10px; overflow-x: auto; margin: 12px 0; border: 1px solid var(--border-subtle); max-width: 100%; }
body.dark-mode .message-content pre { background: #191919; }
.message-content code { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; font-size: 13px; background: rgba(0, 0, 0, 0.04); padding: 2px 5px; border-radius: 4px; }
body.dark-mode .message-content code { background: rgba(255, 255, 255, 0.08); }

/* DYNAMIC THINKING SHIMMER (Clean, Sparkle-Free) */
.message.assistant.is-thinking .message-content { display: flex; align-items: center; font-size: 14.5px; font-weight: 500; padding: 2px 0; }
.thinking-shimmer { background: linear-gradient(90deg, var(--text-muted) 0%, var(--text-primary) 50%, var(--text-muted) 100%); background-size: 200% 100%; -webkit-background-clip: text; -webkit-text-fill-color: transparent; animation: shimmerWave 1.8s infinite linear; }
@keyframes shimmerWave { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

.message.assistant.is-thinking .message-actions { display: none !important; }
.message-actions { display: flex; align-items: center; gap: 2px; margin-top: 6px; margin-left: -4px; animation: fadeIn 0.2s ease forwards; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(2px); } to { opacity: 1; transform: translateY(0); } }
.msg-action-btn { position: relative; background: transparent; border: none; color: var(--text-muted); width: 28px; height: 28px; padding: 0; border-radius: 6px; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; transition: all 0.15s ease; opacity: 0.75; }
.msg-action-btn:hover { background-color: var(--bg-hover); opacity: 1; color: var(--text-primary); }
.msg-action-btn svg, .msg-action-btn i { width: 16px !important; height: 16px !important; pointer-events: none; }

/* COMPOSER DOCK & DYNAMIC PILL CONTAINER */
.composer-dock { position: absolute; bottom: 0; left: 0; right: 0; padding: 12px 20px 16px 20px; background: linear-gradient(to top, var(--bg-main) 85%, transparent); z-index: 30; pointer-events: none; }
.composer-wrapper { max-width: 768px; margin: 0 auto; position: relative; pointer-events: auto; }

.drag-drop-overlay { display: none; position: absolute; inset: 0; background: var(--bg-main); border: 2px dashed var(--focus-ring); border-radius: 28px; z-index: 50; flex-direction: column; align-items: center; justify-content: center; gap: 8px; color: var(--focus-ring); font-weight: 600; font-size: 14px; }
.drag-drop-overlay.active { display: flex; }

.live-suggestions { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; overflow-x: auto; padding: 2px 4px; scrollbar-width: none; }
.live-suggestions::-webkit-scrollbar { display: none; }
.suggestion-chip { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: 20px; background: var(--user-msg-bg); border: 1px solid var(--border-subtle); color: var(--text-primary); font-size: 13px; font-weight: 500; cursor: pointer; white-space: nowrap; transition: all 0.15s ease; }
.suggestion-chip:hover { background: var(--bg-hover); border-color: rgba(0,0,0,0.15); }
body.dark-mode .suggestion-chip { background: var(--bg-sidebar); border-color: var(--border-subtle); }

/* COMPOSER PILL & EXPANDED ROUNDED RECTANGLE SHAPES */
.glass-input-container { 
    background: var(--bg-sidebar); 
    border: 1px solid var(--border-subtle); 
    border-radius: 28px; 
    padding: 6px 8px 6px 12px; 
    display: flex; 
    flex-direction: column; 
    gap: 8px; 
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.04); 
    transition: border-color 0.15s ease, box-shadow 0.15s ease, border-radius 0.2s ease; 
}
.glass-input-container.is-expanded { 
    border-radius: 18px; 
}
.glass-input-container:focus-within { border-color: rgba(0, 0, 0, 0.2); box-shadow: 0 4px 22px rgba(0, 0, 0, 0.08); }
body.dark-mode .glass-input-container:focus-within { border-color: rgba(255, 255, 255, 0.2); }

/* ATTACHMENTS & IMAGE THUMBNAIL PREVIEWS */
.attached-chips-wrapper { display: flex; flex-wrap: wrap; gap: 8px; padding-top: 4px; padding-bottom: 2px; }
.attached-chips-wrapper:empty { display: none; }

.image-preview-chip {
    position: relative;
    width: 60px;
    height: 60px;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-subtle);
    background: var(--bg-hover);
    flex-shrink: 0;
}
.image-preview-chip img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.image-preview-chip .chip-remove-btn {
    position: absolute;
    top: 3px;
    right: 3px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.65);
    color: #ffffff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    line-height: 1;
    transition: background 0.15s ease;
}
.image-preview-chip .chip-remove-btn:hover { background: #ef4444; }

.file-chip { display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px; border-radius: 14px; background: var(--chip-bg); border: 1px solid var(--border-subtle); font-size: 12.5px; font-weight: 500; color: var(--text-primary); max-width: 220px; }
.file-chip span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-chip-remove { border: none; background: rgba(239, 68, 68, 0.12); color: #ef4444; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; width: 18px; height: 18px; border-radius: 50%; font-size: 11px; margin-left: 2px; flex-shrink: 0; transition: background 0.15s ease, color 0.15s ease; }
.file-chip-remove:hover { background: rgba(239, 68, 68, 0.25); color: #dc2626; }

.composer-input-row { display: flex; align-items: flex-end; gap: 6px; width: 100%; position: relative; }
.attach-btn { background: transparent; border: none; color: var(--text-muted); width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; transition: background 0.15s ease, color 0.15s; flex-shrink: 0; margin-bottom: 1px; }
.attach-btn:hover { background-color: var(--bg-hover); color: var(--text-primary); }

/* REAL-TIME VOICE WAVEFORM CONTAINER */
.voice-transcribe-container { display: none; flex: 1; align-items: center; justify-content: space-between; padding: 0 12px; height: 32px; }
.composer-input-row.is-transcribing textarea#chatInput { display: none; }
.composer-input-row.is-transcribing .voice-transcribe-container { display: flex; }
.composer-input-row.is-transcribing .mic-btn { display: none; }

.wave-dots-bar { display: flex; align-items: center; gap: 3.5px; height: 28px; flex: 1; overflow: hidden; padding: 0 4px; }
.wave-dots-bar span { display: block; width: 3px; height: 4px; background: var(--text-muted); border-radius: 3px; opacity: 0.4; transition: height 0.06s ease, opacity 0.06s ease, background-color 0.06s ease; }

.stop-recording-btn { background: var(--bg-hover); border: none; color: var(--text-primary); width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; transition: background 0.15s ease; margin-left: 10px; flex-shrink: 0; }
.stop-recording-btn:hover { background: rgba(239, 68, 68, 0.15); color: #ef4444; }

.mic-btn { color: var(--text-muted); width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; flex-shrink: 0; background: transparent; transition: all 0.2s ease; margin-bottom: 1px; }
.mic-btn:hover { background-color: var(--bg-hover); color: var(--text-primary); }

textarea#chatInput { flex: 1; background: transparent; border: none; outline: none; color: var(--text-primary); font-size: 15px; resize: none; min-height: 24px; max-height: 160px; line-height: 1.5; padding: 4px 0; margin: 0; overflow-y: auto; }

.send-btn { width: 32px; height: 32px; border-radius: 50%; background: var(--text-primary); color: var(--bg-main); border: none; cursor: pointer; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-bottom: 1px; transition: opacity 0.15s ease, transform 0.1s ease; }
.send-btn:disabled { opacity: 0.3; cursor: not-allowed; }
.send-btn:hover:not(:disabled) { opacity: 0.85; }
.send-btn svg, .send-btn i { width: 16px !important; height: 16px !important; stroke-width: 2.2px; pointer-events: none; }

.composer-note { text-align: center; font-size: 11.5px; color: var(--text-muted); margin-top: 10px; }
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-thumb { background: rgba(0, 0, 0, 0.15); border-radius: 8px; }

/* UPGRADE PRO MODAL */
.modal-overlay { display: none; position: fixed; inset: 0; background: rgba(0, 0, 0, 0.45); backdrop-filter: blur(6px); z-index: 20000; align-items: center; justify-content: center; padding: 20px; }
.modal-overlay.show { display: flex; animation: fadeInModal 0.18s ease forwards; }
@keyframes fadeInModal { from { opacity: 0; transform: scale(0.97); } to { opacity: 1; transform: scale(1); } }
.modal-card { position: relative; width: 100%; max-width: 440px; background: var(--bg-main); border: 1px solid var(--border-subtle); border-radius: 20px; padding: 28px 24px 24px 24px; box-shadow: 0 16px 40px rgba(0, 0, 0, 0.2); }
.modal-close-btn { position: absolute; top: 14px; right: 16px; background: transparent; border: none; font-size: 22px; color: var(--text-muted); cursor: pointer; line-height: 1; transition: color 0.12s ease; }
.modal-close-btn:hover { color: var(--text-primary); }
.modal-header { text-align: center; margin-bottom: 22px; }
.pro-sparkle-badge { width: 46px; height: 46px; margin: 0 auto 12px auto; border-radius: 50%; background: rgba(59, 130, 246, 0.12); color: var(--focus-ring); display: flex; align-items: center; justify-content: center; }
.modal-header h2 { font-size: 20px; font-weight: 700; color: var(--text-primary); margin-bottom: 6px; }
.modal-header p { font-size: 13px; color: var(--text-muted); line-height: 1.4; }
.modal-features-list { display: flex; flex-direction: column; gap: 14px; margin-bottom: 26px; }
.feature-item { display: flex; align-items: flex-start; gap: 12px; }
.feature-icon { width: 32px; height: 32px; border-radius: 8px; background: var(--bg-hover); color: var(--text-primary); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.feature-text strong { display: block; font-size: 13.5px; font-weight: 600; color: var(--text-primary); }
.feature-text small { display: block; font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.modal-footer-actions { display: flex; flex-direction: column; gap: 8px; }
.upgrade-btn-primary { width: 100%; padding: 12px; border-radius: 12px; background: linear-gradient(135deg, #2563eb, #7c3aed); color: #ffffff; font-size: 14px; font-weight: 600; border: none; cursor: pointer; transition: opacity 0.15s ease, transform 0.1s ease; }
.upgrade-btn-primary:hover { opacity: 0.92; }
.upgrade-btn-secondary { width: 100%; padding: 10px; border-radius: 12px; background: transparent; color: var(--text-muted); font-size: 13px; font-weight: 500; border: none; cursor: pointer; transition: color 0.12s ease; }
.upgrade-btn-secondary:hover { color: var(--text-primary); }