/* ============================================
   EVENT CHATBOT - Premium Design System
   Crimson & Indigo Theme
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500&display=swap');

/* ============ CSS VARIABLES ============ */
:root {
    /* Crimson Palette */
    --crimson-50: #FFF1F2;
    --crimson-100: #FFE4E6;
    --crimson-200: #FECDD3;
    --crimson-300: #FDA4AF;
    --crimson-400: #DC143C;
    --crimson-500: #BE123C;
    --crimson-600: #9F1239;

    /* Indigo Palette */
    --indigo-50: #EEF2FF;
    --indigo-100: #E0E7FF;
    --indigo-200: #C7D2FE;
    --indigo-300: #A5B4FC;
    --indigo-400: #6D28D9;
    --indigo-500: #3F0071;
    --indigo-600: #2E005A;

    /* Dark Theme (default) */
    --bg-color: #0A0A1A;
    --bg-secondary: #10102A;
    --surface-color: #161638;
    --surface-hover: #1C1C48;
    --surface-active: #22224E;
    --border-color: rgba(99, 102, 241, 0.15);
    --border-hover: rgba(99, 102, 241, 0.3);

    --text-primary: #F1F5F9;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;

    --glass-bg: rgba(22, 22, 56, 0.85);
    --glass-border: rgba(99, 102, 241, 0.12);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);

    --gradient-primary: linear-gradient(135deg, var(--crimson-400), var(--indigo-400));
    --gradient-hero: linear-gradient(135deg, #DC143C 0%, #6D28D9 50%, #3F0071 100%);
    --gradient-surface: linear-gradient(180deg, var(--surface-color) 0%, var(--bg-color) 100%);

    --sidebar-width: 280px;
    --header-height: 64px;
    --input-height: 72px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme */
.light-theme {
    --bg-color: #F8F9FC;
    --bg-secondary: #FFFFFF;
    --surface-color: #FFFFFF;
    --surface-hover: #F1F5F9;
    --surface-active: #E2E8F0;
    --border-color: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(0, 0, 0, 0.15);
    --text-primary: #1E293B;
    --text-secondary: #475569;
    --text-muted: #94A3B8;
    --glass-bg: rgba(255, 255, 255, 0.9);
    --glass-border: rgba(0, 0, 0, 0.06);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

/* ============ GLOBAL RESET ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; overflow: hidden; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============ APP LAYOUT ============ */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

/* ============ SIDEBAR ============ */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    z-index: 100;
    transition: transform var(--transition-smooth);
    overflow: hidden;
}

.sidebar-header {
    padding: 24px 20px 16px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.bot-avatar-large {
    width: 56px; height: 56px;
    background: var(--gradient-primary);
    border-radius: 16px;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 12px;
    font-size: 1.5rem; color: #fff;
    box-shadow: 0 4px 20px rgba(220, 20, 60, 0.3);
}

.sidebar-header h2 {
    font-size: 1.1rem; font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-subtitle { font-size: 0.75rem; color: var(--text-muted); margin-top: 2px; }

/* Event Info Card */
.event-info-card {
    margin: 12px;
    padding: 14px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    position: relative;
    overflow: hidden;
}
.event-info-card::before {
    content: '';
    position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: var(--gradient-primary);
}
.event-badge {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 3px 10px; border-radius: 20px;
    background: rgba(220, 20, 60, 0.15); color: var(--crimson-400);
    font-size: 0.6rem; font-weight: 700; letter-spacing: 0.75px;
    margin-bottom: 8px;
}
.event-badge::before {
    content: ''; width: 6px; height: 6px;
    background: var(--crimson-400); border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}
.event-info-card h3 { font-size: 0.9rem; font-weight: 700; margin-bottom: 4px; line-height: 1.3; }
.event-tagline { font-size: 0.72rem; color: var(--text-muted); font-style: italic; margin-bottom: 8px; }
.event-meta { display: flex; flex-direction: column; gap: 4px; }
.event-meta span { font-size: 0.72rem; color: var(--text-secondary); display: flex; align-items: center; gap: 6px; }
.event-meta i { color: var(--crimson-400); font-size: 0.65rem; width: 14px; text-align: center; }

/* Sidebar Navigation */
.sidebar-nav {
    flex: 1; overflow-y: auto; padding: 8px 12px;
    scrollbar-width: thin; scrollbar-color: var(--border-color) transparent;
}
.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-track { background: transparent; }
.sidebar-nav::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }

.nav-section-title {
    font-size: 0.62rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: 1.2px; color: var(--text-muted);
    padding: 12px 8px 6px; margin-top: 4px;
}

.nav-item {
    display: flex; align-items: center; gap: 10px;
    width: 100%; padding: 9px 12px;
    background: transparent; border: none;
    color: var(--text-secondary); font-size: 0.8rem; font-weight: 500;
    border-radius: var(--radius-sm); cursor: pointer;
    transition: all var(--transition-fast);
    text-align: left; font-family: inherit;
}
.nav-item:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
    transform: translateX(3px);
}
.nav-item i { width: 18px; text-align: center; font-size: 0.85rem; color: var(--crimson-400); }

.google-signin-btn {
    background: var(--surface-color) !important;
    border: 1px solid var(--border-color) !important;
    justify-content: center;
    margin: 8px 0 !important;
    padding: 10px 12px !important;
}
.google-signin-btn i { color: #4285F4 !important; }

/* Sidebar Footer */
.sidebar-footer {
    padding: 12px; border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}
.sidebar-footer > p { font-size: 0.65rem; color: var(--text-muted); text-align: center; }

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

/* ============ HEADER ============ */
.chat-header {
    height: var(--header-height);
    padding: 0 20px;
    display: flex; align-items: center; gap: 12px;
    background: var(--glass-bg);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-shrink: 0; z-index: 10;
}

.menu-toggle {
    display: none;
    background: transparent; border: none; color: var(--text-primary);
    font-size: 1.2rem; cursor: pointer; padding: 8px;
    border-radius: var(--radius-sm);
}
.menu-toggle:hover { background: var(--surface-hover); }

.header-info { display: flex; align-items: center; gap: 10px; flex: 1; }
.header-avatar {
    width: 38px; height: 38px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    font-size: 1rem; color: white; position: relative;
}
.status-dot {
    position: absolute; bottom: -1px; right: -1px;
    width: 10px; height: 10px; border-radius: 50%;
    border: 2px solid var(--bg-color);
}
.status-dot.online { background: #10B981; }
.chat-header h1 { font-size: 0.95rem; font-weight: 700; }
.header-status { font-size: 0.7rem; color: var(--text-muted); }

.header-actions { display: flex; align-items: center; gap: 6px; }
.header-btn {
    width: 36px; height: 36px; border-radius: var(--radius-sm);
    background: transparent; border: 1px solid var(--border-color);
    color: var(--text-secondary); cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: all var(--transition-fast); font-size: 0.85rem;
}
.header-btn:hover {
    background: var(--surface-hover); color: var(--text-primary);
    border-color: var(--border-hover);
}

/* View Toggle Group */
.view-toggle-group {
    display: flex;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-right: 6px;
}
.view-toggle-btn {
    width: 36px; height: 36px;
    background: transparent; border: none;
    color: var(--text-muted); cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: all var(--transition-fast); font-size: 0.85rem;
}
.view-toggle-btn:first-child { border-right: 1px solid var(--border-color); }
.view-toggle-btn.active {
    background: var(--gradient-primary);
    color: #fff;
}
.view-toggle-btn:not(.active):hover {
    background: var(--surface-hover);
    color: var(--text-primary);
}

/* ============ VIEW PANELS ============ */
.view-panel {
    display: none;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}
.view-panel.active {
    display: flex;
}

/* ============ WELCOME SCREEN ============ */
.welcome-screen {
    display: flex; flex-direction: column; align-items: center;
    padding: 40px 20px 30px;
    animation: fadeInUp 0.6s ease-out;
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.welcome-hero { text-align: center; margin-bottom: 24px; }
.welcome-icon-ring {
    width: 90px; height: 90px;
    border-radius: 50%;
    background: var(--gradient-primary);
    padding: 3px;
    margin: 0 auto 18px;
    animation: ring-spin 6s linear infinite;
}
@keyframes ring-spin {
    0% { box-shadow: 0 0 0 0 rgba(220, 20, 60, 0.4); }
    50% { box-shadow: 0 0 0 12px rgba(109, 40, 217, 0); }
    100% { box-shadow: 0 0 0 0 rgba(220, 20, 60, 0.4); }
}
.welcome-icon {
    width: 100%; height: 100%;
    background: var(--bg-color);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 2.2rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.welcome-hero h2 { font-size: 1.6rem; font-weight: 800; margin-bottom: 6px; }
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.welcome-subtitle { font-size: 0.9rem; color: var(--text-muted); max-width: 400px; }

/* Welcome Event Banner */
.welcome-event-banner {
    position: relative;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    margin-bottom: 28px;
    width: 100%;
    max-width: 520px;
    overflow: hidden;
}
.banner-glow {
    position: absolute; top: -50%; left: -25%;
    width: 150%; height: 200%;
    background: radial-gradient(ellipse, rgba(220, 20, 60, 0.06), transparent 60%);
    pointer-events: none;
}
.banner-content { position: relative; z-index: 1; }
.live-pulse {
    display: inline-block;
    width: 8px; height: 8px;
    background: #10B981; border-radius: 50%;
    margin-right: 8px; vertical-align: middle;
    animation: pulse-dot 1.5s infinite;
}
.banner-content h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; display: inline; }
.banner-meta {
    display: flex; gap: 16px; margin-top: 10px;
    flex-wrap: wrap;
}
.banner-meta span { font-size: 0.8rem; color: var(--text-secondary); display: flex; align-items: center; gap: 6px; }
.banner-meta i { color: var(--crimson-400); font-size: 0.75rem; }

/* Quick Actions Grid */
.quick-actions-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    width: 100%; max-width: 520px;
}
.quick-action-card {
    display: flex; flex-direction: column; align-items: center;
    gap: 8px; padding: 18px 10px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer; font-family: inherit;
    transition: all var(--transition-normal);
    color: var(--text-secondary);
}
.quick-action-card:hover {
    border-color: var(--crimson-400);
    background: var(--surface-hover);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(220, 20, 60, 0.12);
    color: var(--text-primary);
}
.qa-icon {
    width: 42px; height: 42px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.1rem; color: #fff;
}
.quick-action-card span { font-size: 0.72rem; font-weight: 600; }

/* ============ CHAT MESSAGES ============ */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 20px;
    min-height: 0;
    scroll-behavior: smooth;
    scrollbar-width: thin; scrollbar-color: var(--border-color) transparent;
}
.chat-messages::-webkit-scrollbar { width: 5px; }
.chat-messages::-webkit-scrollbar-track { background: transparent; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }

.message {
    display: flex; gap: 10px;
    margin-bottom: 16px;
    animation: messageSlide 0.3s ease-out;
    max-width: 85%;
}
@keyframes messageSlide { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.message.user { flex-direction: row-reverse; margin-left: auto; }

.message-avatar {
    width: 32px; height: 32px;
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    font-size: 0.8rem; flex-shrink: 0;
}
.message.bot .message-avatar { background: var(--gradient-primary); color: #fff; }
.message.user .message-avatar { background: var(--surface-color); border: 1px solid var(--border-color); color: var(--text-secondary); }

.message-content {
    padding: 12px 16px;
    border-radius: var(--radius-lg);
    font-size: 0.88rem; line-height: 1.6;
    max-width: 100%;
    word-wrap: break-word;
}
.message.bot .message-content {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-top-left-radius: 4px;
}
.message.user .message-content {
    background: var(--gradient-primary);
    color: #fff;
    border-top-right-radius: 4px;
}

.message-time {
    display: block; margin-top: 6px;
    font-size: 0.65rem; color: var(--text-muted);
}
.message.user .message-time { color: rgba(255,255,255,0.6); text-align: right; }

/* ============ CARDS ============ */
.cards-container { display: flex; flex-direction: column; gap: 10px; margin-top: 12px; }

.info-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 14px;
    transition: all var(--transition-fast);
}
.info-card:hover { border-color: var(--border-hover); }
.card-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; margin-bottom: 8px; }
.card-title { font-size: 0.88rem; font-weight: 700; color: var(--text-primary); }
.card-badge {
    padding: 2px 10px; border-radius: 12px;
    font-size: 0.6rem; font-weight: 700; letter-spacing: 0.5px; text-transform: uppercase;
    background: rgba(220, 20, 60, 0.1); color: var(--crimson-400);
    white-space: nowrap;
}
.card-badge.ongoing {
    background: rgba(16, 185, 129, 0.15); color: #10B981;
    animation: pulse-dot 2s infinite;
}
.card-details { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
.card-detail { font-size: 0.76rem; color: var(--text-secondary); display: flex; align-items: center; gap: 4px; }
.card-detail i { color: var(--crimson-400); font-size: 0.7rem; }
.card-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.card-action-btn {
    padding: 5px 12px; border-radius: 6px;
    background: var(--surface-color); border: 1px solid var(--border-color);
    color: var(--text-secondary); font-size: 0.72rem; font-weight: 600;
    cursor: pointer; transition: all var(--transition-fast); font-family: inherit;
}
.card-action-btn:hover { background: var(--gradient-primary); color: #fff; border-color: transparent; }

/* Presenter Card */
.presenter-card {
    display: flex; gap: 12px; align-items: center;
    background: var(--bg-color); border: 1px solid var(--border-color);
    border-radius: var(--radius-md); padding: 14px;
}
.presenter-avatar {
    width: 44px; height: 44px;
    background: var(--gradient-primary);
    border-radius: 50%; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-weight: 700; font-size: 0.9rem;
}
.presenter-info h4 { font-size: 0.88rem; font-weight: 600; }
.presenter-info p { font-size: 0.76rem; color: var(--text-secondary); }

/* Venue, Attendee, Kiosk Cards */
.venue-card, .attendee-card, .kiosk-card {
    background: var(--bg-color); border: 1px solid var(--border-color);
    border-radius: var(--radius-md); padding: 14px;
}
.venue-type-icon {
    width: 36px; height: 36px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: 0.9rem; flex-shrink: 0;
}
.kiosk-card h4 { font-size: 0.88rem; font-weight: 700; margin-bottom: 4px; }
.kiosk-company { font-size: 0.76rem; color: var(--crimson-400); font-weight: 600; margin-bottom: 4px; }
.kiosk-card p { font-size: 0.76rem; color: var(--text-secondary); }

.attendee-card { display: flex; gap: 10px; align-items: center; }
.attendee-avatar {
    width: 36px; height: 36px;
    background: var(--gradient-primary);
    border-radius: 50%; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-weight: 700; font-size: 0.75rem;
}

/* Action Buttons */
.action-buttons { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 12px; }
.action-btn {
    padding: 7px 14px; border-radius: 20px;
    background: var(--surface-color); border: 1px solid var(--border-color);
    color: var(--text-secondary); font-size: 0.78rem; font-weight: 600;
    cursor: pointer; transition: all var(--transition-fast); font-family: inherit;
}
.action-btn:hover { background: var(--gradient-primary); color: #fff; border-color: transparent; }

/* ============ TYPING INDICATOR ============ */
.typing-indicator {
    display: flex; align-items: center; gap: 8px;
    padding: 0 20px 8px;
    flex-shrink: 0;
}
.typing-avatar {
    width: 28px; height: 28px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: 0.7rem;
}
.typing-dots { display: flex; gap: 4px; }
.typing-dots span {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--text-muted);
    animation: typingBounce 1.4s infinite ease-in-out;
}
.typing-dots span:nth-child(1) { animation-delay: 0s; }
.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typingBounce {
    0%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-8px); }
}

/* ============ SUGGESTION CHIPS ============ */
.suggestion-chips {
    display: flex; gap: 8px; padding: 6px 20px;
    overflow-x: auto;
    flex-shrink: 0;
    min-height: 0;
    scrollbar-width: none;
}
.suggestion-chips::-webkit-scrollbar { display: none; }
.suggestion-chip {
    padding: 7px 14px; border-radius: 20px;
    background: var(--surface-color); border: 1px solid var(--border-color);
    color: var(--text-secondary); font-size: 0.76rem; font-weight: 500;
    cursor: pointer; white-space: nowrap;
    transition: all var(--transition-fast); font-family: inherit;
}
.suggestion-chip:hover {
    background: var(--gradient-primary); color: #fff; border-color: transparent;
    transform: translateY(-2px);
}

/* ============ CHAT INPUT ============ */
.chat-input-area {
    padding: 12px 20px 16px;
    background: var(--glass-bg);
    border-top: 1px solid var(--border-color);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-shrink: 0;
}
.input-container {
    display: flex; align-items: center; gap: 8px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 6px;
    transition: border-color var(--transition-fast);
}
.input-container:focus-within {
    border-color: var(--crimson-400);
    box-shadow: 0 0 0 3px rgba(220, 20, 60, 0.1);
}
.input-action-btn {
    width: 38px; height: 38px; border-radius: var(--radius-sm);
    background: transparent; border: none;
    color: var(--text-muted); cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.1rem;
    transition: color var(--transition-fast);
}
.input-action-btn:hover { color: var(--crimson-400); }

#messageInput {
    flex: 1; background: transparent; border: none; outline: none;
    color: var(--text-primary); font-size: 0.9rem; font-family: inherit;
    padding: 8px 4px;
}
#messageInput::placeholder { color: var(--text-muted); }

.send-btn {
    width: 40px; height: 40px;
    background: var(--gradient-primary);
    border: none; border-radius: var(--radius-sm);
    color: #fff; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.95rem; flex-shrink: 0;
    transition: all var(--transition-fast);
}
.send-btn:hover { transform: scale(1.05); box-shadow: 0 4px 16px rgba(220, 20, 60, 0.3); }

/* ============ CALENDAR VIEW ============ */
.calendar-container {
    display: flex; flex-direction: column;
    flex: 1; overflow: hidden;
}

.calendar-header-bar {
    padding: 20px 24px 12px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}
.calendar-title-row {
    display: flex; align-items: center; justify-content: space-between;
    flex-wrap: wrap; gap: 10px;
    margin-bottom: 12px;
}
.calendar-title {
    font-size: 1.15rem; font-weight: 800;
    display: flex; align-items: center; gap: 10px;
}
.calendar-title i {
    background: var(--gradient-primary);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.calendar-date-badge {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 14px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 0.78rem; font-weight: 600;
    color: var(--text-secondary);
}
.calendar-date-badge i { color: var(--crimson-400); }

.calendar-legend {
    display: flex; gap: 14px; flex-wrap: wrap;
}
.legend-item {
    display: flex; align-items: center; gap: 5px;
    font-size: 0.7rem; color: var(--text-muted); font-weight: 500;
}
.legend-dot {
    width: 10px; height: 10px;
    border-radius: 3px;
}

/* Timeline */
.calendar-timeline {
    flex: 1; overflow-y: auto;
    padding: 16px 24px 30px;
    scrollbar-width: thin; scrollbar-color: var(--border-color) transparent;
}
.calendar-timeline::-webkit-scrollbar { width: 5px; }
.calendar-timeline::-webkit-scrollbar-track { background: transparent; }
.calendar-timeline::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }

.timeline-loading {
    text-align: center; padding: 60px;
    color: var(--text-muted); font-size: 0.9rem;
}
.timeline-loading i { margin-right: 8px; }

/* Time Slot */
.time-slot {
    display: flex; gap: 16px;
    margin-bottom: 6px;
    position: relative;
}
.time-label {
    width: 70px;
    font-size: 0.75rem; font-weight: 700;
    color: var(--text-muted);
    text-align: right;
    padding-top: 12px;
    flex-shrink: 0;
}
.time-slot-line {
    flex: 1;
    border-top: 1px dashed var(--border-color);
    margin-top: 18px;
    position: relative;
}

/* Session Block */
.session-block {
    position: relative;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--crimson-400);
    border-radius: var(--radius-sm);
    padding: 12px 14px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
    animation: fadeInUp 0.3s ease-out;
}
.session-block:hover {
    border-color: var(--border-hover);
    transform: translateX(4px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}
.session-block-header {
    display: flex; justify-content: space-between; align-items: flex-start; gap: 8px;
}
.session-block-title {
    font-size: 0.88rem; font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
}
.session-block-type {
    padding: 2px 10px; border-radius: 10px;
    font-size: 0.6rem; font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.5px;
    white-space: nowrap; flex-shrink: 0;
}
.session-block-meta {
    display: flex; flex-wrap: wrap; gap: 10px;
    margin-top: 8px;
}
.session-block-meta span {
    font-size: 0.74rem; color: var(--text-secondary);
    display: flex; align-items: center; gap: 4px;
}
.session-block-meta i { font-size: 0.7rem; }
.session-block-actions {
    display: flex; gap: 6px; margin-top: 10px;
}
.sb-action {
    padding: 4px 10px; border-radius: 6px;
    background: var(--bg-color); border: 1px solid var(--border-color);
    color: var(--text-muted); font-size: 0.68rem; font-weight: 600;
    cursor: pointer; transition: all var(--transition-fast); font-family: inherit;
}
.sb-action:hover { background: var(--gradient-primary); color: #fff; border-color: transparent; }

/* Type colors */
.type-keynote { background: rgba(220, 20, 60, 0.15); color: var(--crimson-400); }
.type-breakout { background: rgba(109, 40, 217, 0.15); color: var(--indigo-400); }
.type-workshop { background: rgba(5, 150, 105, 0.15); color: #059669; }
.type-panel { background: rgba(217, 119, 6, 0.15); color: #D97706; }
.type-networking { background: rgba(124, 58, 237, 0.15); color: #7C3AED; }
.type-lunch, .type-break, .type-registration {
    background: rgba(100, 116, 139, 0.1); color: var(--text-muted);
}

/* ============ MODALS ============ */
.modal-overlay {
    position: fixed; inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(6px);
    display: flex; align-items: center; justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease-out;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    width: 90%; max-width: 440px;
    overflow: hidden; position: relative;
    box-shadow: var(--glass-shadow);
    animation: modalSlide 0.3s ease-out;
}
@keyframes modalSlide { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

.modal-close {
    position: absolute; top: 16px; right: 16px;
    background: var(--surface-color); border: 1px solid var(--border-color);
    color: var(--text-muted); cursor: pointer;
    width: 32px; height: 32px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.85rem; z-index: 1;
    transition: all var(--transition-fast);
}
.modal-close:hover { background: var(--crimson-400); color: #fff; border-color: transparent; }

.modal-header {
    padding: 20px 24px 12px;
    border-bottom: 1px solid var(--border-color);
}
.modal-header h3 { font-size: 1rem; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.modal-header i { color: var(--crimson-400); }

.modal-body { padding: 20px 24px; }
.modal-footer {
    padding: 14px 24px;
    border-top: 1px solid var(--border-color);
    display: flex; gap: 8px; justify-content: flex-end;
}

/* Form Groups */
.form-group { margin-bottom: 14px; }
.form-group label {
    display: block; margin-bottom: 5px;
    font-size: 0.82rem; font-weight: 600; color: var(--text-secondary);
}
.form-group label small { font-weight: 400; color: var(--text-muted); }
.form-group input, .form-group select {
    width: 100%; padding: 10px 12px; border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: var(--surface-color); color: var(--text-primary);
    font-family: inherit; font-size: 0.85rem;
    transition: border-color var(--transition-fast);
}
.form-group input:focus, .form-group select:focus {
    outline: none;
    border-color: var(--crimson-400);
    box-shadow: 0 0 0 3px rgba(220, 20, 60, 0.1);
}

/* Buttons */
.btn {
    padding: 10px 20px; border-radius: var(--radius-sm);
    font-weight: 600; font-size: 0.85rem;
    cursor: pointer; border: none;
    transition: all var(--transition-fast);
    display: inline-flex; align-items: center; gap: 6px;
    font-family: inherit;
}
.btn-primary { background: var(--gradient-primary); color: #fff; }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(220, 20, 60, 0.3); }
.btn-secondary {
    background: var(--surface-color); border: 1px solid var(--border-color);
    color: var(--text-secondary);
}
.btn-secondary:hover { background: var(--surface-hover); color: var(--text-primary); }

/* Share Buttons */
.share-buttons { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.share-btn {
    display: flex; flex-direction: column; align-items: center; gap: 6px;
    padding: 16px 10px; border-radius: var(--radius-md);
    background: var(--surface-color); border: 1px solid var(--border-color);
    color: var(--text-secondary); cursor: pointer;
    transition: all var(--transition-fast); font-family: inherit;
}
.share-btn:hover { transform: translateY(-3px); }
.share-btn i { font-size: 1.3rem; }
.share-btn span { font-size: 0.72rem; font-weight: 600; }
.share-btn.whatsapp:hover { background: #25D366; color: #fff; border-color: #25D366; }
.share-btn.twitter:hover { background: #1DA1F2; color: #fff; border-color: #1DA1F2; }
.share-btn.linkedin:hover { background: #0A66C2; color: #fff; border-color: #0A66C2; }
.share-btn.email:hover { background: var(--crimson-400); color: #fff; border-color: var(--crimson-400); }
.share-btn.copy:hover { background: var(--indigo-400); color: #fff; border-color: var(--indigo-400); }

/* QR Display */
.qr-display { text-align: center; }
.qr-display img { max-width: 220px; margin: 0 auto 12px; display: block; border-radius: var(--radius-md); }
.qr-event-name { font-weight: 700; font-size: 0.95rem; margin-bottom: 4px; }
.qr-loading { text-align: center; padding: 40px; color: var(--text-muted); }

/* Toast Notifications */
.toast {
    position: fixed; bottom: 24px; right: 24px;
    padding: 12px 20px; border-radius: var(--radius-md);
    background: var(--surface-color); border: 1px solid var(--border-color);
    color: var(--text-primary); font-size: 0.85rem; font-weight: 500;
    display: flex; align-items: center; gap: 8px;
    box-shadow: var(--glass-shadow);
    z-index: 10000;
    animation: toastSlide 0.3s ease-out;
}
@keyframes toastSlide { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
.toast.success i { color: #10B981; }
.toast.error i { color: var(--crimson-400); }
.toast.info i { color: #3B82F6; }

/* Sidebar overlay */
.sidebar-overlay {
    display: none; position: fixed; inset: 0;
    background: rgba(0, 0, 0, 0.5); z-index: 99;
}
.sidebar-overlay.active { display: block; }

/* ============ RESPONSIVE ============ */
@media (max-width: 900px) {
    .sidebar {
        position: fixed; left: 0; top: 0; bottom: 0;
        transform: translateX(-100%);
        z-index: 200;
    }
    .sidebar.open { transform: translateX(0); }
    .menu-toggle { display: flex; }
    .quick-actions-grid { grid-template-columns: repeat(2, 1fr); }
    .welcome-hero h2 { font-size: 1.3rem; }
    .share-buttons { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
    .chat-header { padding: 0 12px; }
    .chat-messages { padding: 12px; }
    .chat-input-area { padding: 8px 12px 12px; }
    .message { max-width: 92%; }
    .calendar-header-bar { padding: 14px 16px 10px; }
    .calendar-timeline { padding: 12px 16px; }
    .time-label { width: 55px; font-size: 0.68rem; }
}