/* ===== CSS VARIABLES ===== */
:root {
  --accent: #18b5b8;
  --accent-dark: #0f8f92;
  --accent-light: #e0f7f7;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --surface: #ffffff;
  --border: #e2e8f0;
  --text: #1a202c;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.10);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.25s ease;
  --font: 'Inter', system-ui, sans-serif;
}
[data-theme="dark"] {
  --bg: #0f172a;
  --bg-alt: #1e293b;
  --surface: #1e293b;
  --border: #334155;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --text-light: #64748b;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --accent-light: #0f3a3b;
}
/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.7; transition: background var(--transition), color var(--transition); }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ===== BUTTONS ===== */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 24px; border-radius: 8px; font-weight: 600; font-size: 0.9rem; cursor: pointer; transition: all var(--transition); border: 2px solid transparent; }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(24,181,184,0.35); }
.btn-outline { background: transparent; color: var(--accent); border-color: var(--accent); }
.btn-outline:hover { background: var(--accent); color: #fff; transform: translateY(-2px); }
.btn-full { width: 100%; justify-content: center; }

/* ===== NAVBAR ===== */
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; display: flex; align-items: center; gap: 32px; padding: 0 32px; height: 68px; background: var(--bg); border-bottom: 1px solid var(--border); box-shadow: var(--shadow-sm); transition: background var(--transition), box-shadow var(--transition); }
.navbar.scrolled { box-shadow: var(--shadow-md); }
.nav-logo { font-size: 1.4rem; font-weight: 800; color: var(--text); white-space: nowrap; }
.nav-logo span { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 4px; margin: 0 auto; }
.nav-link { padding: 6px 12px; border-radius: 6px; font-size: 0.9rem; font-weight: 500; color: var(--text-muted); transition: color var(--transition), background var(--transition); }
.nav-link:hover, .nav-link.active { color: var(--accent); background: var(--accent-light); }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.theme-toggle { background: none; border: 1px solid var(--border); border-radius: 8px; width: 38px; height: 38px; display: flex; align-items: center; justify-content: center; cursor: pointer; color: var(--text-muted); transition: all var(--transition); }
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; margin-left: auto; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: all var(--transition); }

/* ===== SECTION BASE ===== */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }
.section-header { text-align: center; margin-bottom: 56px; }
.section-label { font-size: 0.8rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 8px; }
.section-title { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 800; color: var(--text); line-height: 1.2; }
.section-desc { margin-top: 12px; color: var(--text-muted); font-size: 1.05rem; }

/* ===== HERO ===== */
.hero { min-height: 100vh; display: flex; align-items: center; padding: 100px 32px 60px; max-width: 1100px; margin: 0 auto; gap: 48px; position: relative; }
.hero-content { flex: 1; }
.hero-eyebrow { font-size: 0.85rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); margin-bottom: 16px; }
.hero-title { font-size: clamp(2rem, 5vw, 3.4rem); font-weight: 800; line-height: 1.15; color: var(--text); margin-bottom: 20px; }
.gradient-text { background: linear-gradient(135deg, var(--accent), #6366f1); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-sub { font-size: 1.05rem; color: var(--text-muted); max-width: 520px; margin-bottom: 32px; line-height: 1.8; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 32px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.hero-tags span { padding: 4px 12px; background: var(--accent-light); color: var(--accent); border-radius: 20px; font-size: 0.8rem; font-weight: 600; }
.hero-image { flex: 0 0 380px; display: flex; justify-content: center; }
.hero-img-wrapper { width: 340px; height: 340px; border-radius: 50%; overflow: hidden; border: 4px solid var(--accent); box-shadow: 0 0 0 8px var(--accent-light), var(--shadow-lg); animation: float 4s ease-in-out infinite; }
.hero-img-wrapper img { width: 100%; height: 100%; object-fit: cover; object-position: center top; }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
.scroll-indicator { position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%); color: var(--text-muted); font-size: 1.2rem; animation: bounce 2s infinite; }
@keyframes bounce { 0%, 100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(8px); } }

/* ===== ABOUT ===== */
.about-grid { display: grid; grid-template-columns: 1fr 1.6fr; gap: 64px; align-items: center; }
.about-image { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.about-image img { width: 100%; border-radius: var(--radius-lg); }
.about-content h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 16px; color: var(--text); }
.about-content p { color: var(--text-muted); margin-bottom: 14px; line-height: 1.8; }
.about-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 24px 0; padding: 20px; background: var(--bg-alt); border-radius: var(--radius); border: 1px solid var(--border); }
.meta-item { display: flex; flex-direction: column; gap: 2px; }
.meta-label { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-light); }
.meta-item span { font-size: 0.9rem; color: var(--text); font-weight: 500; }
.available { color: var(--accent) !important; }
.about-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ===== SKILLS ===== */
.skills-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.skill-category { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 28px; box-shadow: var(--shadow-sm); transition: box-shadow var(--transition), transform var(--transition); }
.skill-category:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.skill-category-header { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.skill-category-header i { font-size: 1.3rem; color: var(--accent); width: 40px; height: 40px; background: var(--accent-light); border-radius: 10px; display: flex; align-items: center; justify-content: center; }
.skill-category-header h3 { font-size: 1.05rem; font-weight: 700; }
.skill-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-tags span { padding: 5px 12px; background: var(--bg-alt); border: 1px solid var(--border); border-radius: 20px; font-size: 0.82rem; font-weight: 500; color: var(--text-muted); transition: all var(--transition); }
.skill-tags span:hover { background: var(--accent-light); border-color: var(--accent); color: var(--accent); }

/* ===== PROJECTS ===== */
.projects-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.project-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 32px; box-shadow: var(--shadow-sm); transition: box-shadow var(--transition), transform var(--transition); position: relative; overflow: hidden; }
.project-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--accent), #6366f1); }
.project-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.project-number { font-size: 2.5rem; font-weight: 900; color: var(--border); line-height: 1; margin-bottom: 8px; }
.project-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 20px; color: var(--text); }
.project-section { margin-bottom: 14px; }
.project-label { font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: var(--accent); margin-bottom: 4px; }
.project-section p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.7; }
.project-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.project-tags span { padding: 3px 10px; background: var(--accent-light); color: var(--accent); border-radius: 20px; font-size: 0.78rem; font-weight: 600; }

/* ===== IMPACT ===== */
.impact-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 48px; }
.stat-card { text-align: center; padding: 28px 16px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.stat-number { display: block; font-size: 2.4rem; font-weight: 900; color: var(--accent); line-height: 1; margin-bottom: 8px; }
.stat-label { font-size: 0.85rem; color: var(--text-muted); font-weight: 500; }
.impact-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 56px; }
.impact-card { padding: 28px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); transition: box-shadow var(--transition), transform var(--transition); }
.impact-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.impact-card i { font-size: 1.5rem; color: var(--accent); margin-bottom: 14px; }
.impact-card h4 { font-size: 1rem; font-weight: 700; margin-bottom: 10px; }
.impact-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.7; }
.testimonials-title { font-size: 1.3rem; font-weight: 700; text-align: center; margin-bottom: 24px; }
.testimonial-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.testimonial-card { padding: 28px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.testimonial-card i { color: var(--accent); font-size: 1.2rem; margin-bottom: 12px; }
.testimonial-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.8; font-style: italic; margin-bottom: 14px; }
.testimonial-author { font-size: 0.82rem; font-weight: 700; color: var(--text); }

/* ===== TIMELINE ===== */
.timeline-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.timeline-col-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 28px; display: flex; align-items: center; gap: 10px; color: var(--text); }
.timeline-col-title i { color: var(--accent); }
.timeline { position: relative; padding-left: 24px; }
.timeline::before { content: ''; position: absolute; left: 6px; top: 0; bottom: 0; width: 2px; background: var(--border); }
.timeline-item { position: relative; margin-bottom: 32px; opacity: 0; transform: translateY(20px); transition: opacity 0.5s ease, transform 0.5s ease; }
.timeline-item.visible { opacity: 1; transform: translateY(0); }
.timeline-dot { position: absolute; left: -21px; top: 6px; width: 12px; height: 12px; border-radius: 50%; background: var(--accent); border: 2px solid var(--bg); box-shadow: 0 0 0 2px var(--accent); }
.timeline-content h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 4px; }
.timeline-org { font-size: 0.85rem; color: var(--accent); font-weight: 600; margin-bottom: 2px; }
.timeline-date { font-size: 0.78rem; color: var(--text-light); margin-bottom: 8px; }
.timeline-content p { font-size: 0.88rem; color: var(--text-muted); line-height: 1.7; }
.timeline-content ul { padding-left: 16px; list-style: disc; }
.timeline-content li { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 4px; line-height: 1.6; }

/* ===== CONTACT ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.8fr; gap: 48px; align-items: start; }
.contact-info { display: flex; flex-direction: column; gap: 20px; }
.contact-item { display: flex; align-items: flex-start; gap: 14px; }
.contact-item i { font-size: 1rem; color: var(--accent); width: 38px; height: 38px; background: var(--accent-light); border-radius: 10px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.contact-available { font-size: 0.6rem !important; }
.contact-item-label { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-light); margin-bottom: 2px; }
.contact-item a, .contact-item p { font-size: 0.9rem; color: var(--text-muted); }
.contact-item a:hover { color: var(--accent); }
.social-links { display: flex; gap: 10px; margin-top: 8px; }
.social-links a { width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; color: var(--text-muted); font-size: 0.95rem; transition: all var(--transition); }
.social-links a:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-light); }
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 0.82rem; font-weight: 600; color: var(--text-muted); }
.form-group input, .form-group textarea { padding: 12px 16px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; color: var(--text); font-family: var(--font); font-size: 0.9rem; transition: border-color var(--transition), box-shadow var(--transition); resize: vertical; }
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(24,181,184,0.15); }

/* ===== FOOTER ===== */
.footer { background: var(--bg-alt); border-top: 1px solid var(--border); padding: 32px 0; text-align: center; }
.footer p { font-size: 0.88rem; color: var(--text-muted); }
.footer-copy { margin-top: 4px; font-size: 0.8rem; color: var(--text-light); }

/* ===== BACK TO TOP ===== */
.back-to-top { position: fixed; bottom: 28px; right: 28px; width: 44px; height: 44px; background: var(--accent); color: #fff; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 1rem; box-shadow: var(--shadow-md); opacity: 0; pointer-events: none; transition: opacity var(--transition), transform var(--transition); z-index: 999; }
.back-to-top.visible { opacity: 1; pointer-events: all; }
.back-to-top:hover { transform: translateY(-3px); }

/* ===== ANIMATIONS ===== */
.fade-in { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .skills-grid { grid-template-columns: 1fr 1fr; }
  .impact-stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .navbar { padding: 0 20px; }
  .nav-links { display: none; position: absolute; top: 68px; left: 0; right: 0; background: var(--bg); border-bottom: 1px solid var(--border); flex-direction: column; padding: 16px 20px; gap: 4px; box-shadow: var(--shadow-md); }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .nav-actions .btn { display: none; }
  .hero { flex-direction: column-reverse; text-align: center; padding: 100px 20px 60px; gap: 32px; }
  .hero-sub { margin: 0 auto 32px; }
  .hero-cta { justify-content: center; }
  .hero-tags { justify-content: center; }
  .hero-image { flex: none; }
  .hero-img-wrapper { width: 240px; height: 240px; }
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .about-image { max-width: 320px; margin: 0 auto; }
  .skills-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .impact-stats { grid-template-columns: repeat(2, 1fr); }
  .impact-cards { grid-template-columns: 1fr; }
  .testimonial-grid { grid-template-columns: 1fr; }
  .timeline-grid { grid-template-columns: 1fr; gap: 32px; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .about-meta { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .section { padding: 64px 0; }
  .impact-stats { grid-template-columns: 1fr 1fr; }
}

/* ===== CHATBOT ===== */
.chat-widget { position: fixed; bottom: 28px; left: 28px; z-index: 1100; }

.chat-bubble {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--accent); color: #fff; border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; box-shadow: 0 4px 20px rgba(24,181,184,0.45);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  position: relative;
}
.chat-bubble:hover { transform: scale(1.08); box-shadow: 0 6px 24px rgba(24,181,184,0.55); }
.chat-close-icon { display: none; }
.chat-widget.open .chat-open-icon { display: none; }
.chat-widget.open .chat-close-icon { display: block; }

.chat-badge {
  position: absolute; top: -4px; right: -4px;
  background: #ef4444; color: #fff; font-size: 0.65rem; font-weight: 700;
  width: 18px; height: 18px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  border: 2px solid var(--bg);
  animation: pulse-badge 2s infinite;
}
.chat-badge.hidden { display: none; }
@keyframes pulse-badge { 0%,100% { transform: scale(1); } 50% { transform: scale(1.2); } }

.chat-window {
  position: absolute; bottom: 68px; left: 0;
  width: 340px; background: var(--bg);
  border: 1px solid var(--border); border-radius: 20px;
  box-shadow: var(--shadow-lg);
  display: flex; flex-direction: column;
  overflow: hidden;
  opacity: 0; pointer-events: none;
  transform: translateY(12px) scale(0.97);
  transform-origin: bottom left;
  transition: opacity 0.25s ease, transform 0.25s ease;
}
.chat-widget.open .chat-window { opacity: 1; pointer-events: all; transform: translateY(0) scale(1); }

.chat-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px;
  background: var(--accent);
  color: #fff;
}
.chat-header-info { display: flex; align-items: center; gap: 10px; }
.chat-avatar { width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,0.25); display: flex; align-items: center; justify-content: center; font-size: 0.75rem; font-weight: 800; flex-shrink: 0; }
.chat-name { font-size: 0.9rem; font-weight: 700; line-height: 1; margin-bottom: 3px; }
.chat-status { font-size: 0.72rem; opacity: 0.9; display: flex; align-items: center; gap: 5px; }
.chat-online-dot { width: 7px; height: 7px; border-radius: 50%; background: #4ade80; display: inline-block; }
.chat-header-close { background: none; border: none; color: #fff; cursor: pointer; font-size: 0.9rem; opacity: 0.8; padding: 4px; transition: opacity 0.2s; }
.chat-header-close:hover { opacity: 1; }

.chat-messages {
  flex: 1; overflow-y: auto; padding: 16px;
  display: flex; flex-direction: column; gap: 10px;
  max-height: 300px; min-height: 200px;
  scroll-behavior: smooth;
}
.chat-messages::-webkit-scrollbar { width: 4px; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.chat-msg { display: flex; flex-direction: column; max-width: 85%; }
.chat-msg.bot { align-self: flex-start; }
.chat-msg.user { align-self: flex-end; }

.chat-bubble-msg {
  padding: 10px 14px; border-radius: 16px;
  font-size: 0.85rem; line-height: 1.6;
}
.chat-msg.bot .chat-bubble-msg { background: var(--bg-alt); color: var(--text); border-bottom-left-radius: 4px; border: 1px solid var(--border); }
.chat-msg.user .chat-bubble-msg { background: var(--accent); color: #fff; border-bottom-right-radius: 4px; }

.chat-time { font-size: 0.68rem; color: var(--text-light); margin-top: 3px; }
.chat-msg.user .chat-time { text-align: right; }

.chat-typing { display: flex; align-items: center; gap: 4px; padding: 10px 14px; background: var(--bg-alt); border: 1px solid var(--border); border-radius: 16px; border-bottom-left-radius: 4px; width: fit-content; }
.chat-typing span { width: 6px; height: 6px; border-radius: 50%; background: var(--text-muted); animation: typing-dot 1.2s infinite; }
.chat-typing span:nth-child(2) { animation-delay: 0.2s; }
.chat-typing span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typing-dot { 0%,60%,100% { transform: translateY(0); opacity: 0.4; } 30% { transform: translateY(-5px); opacity: 1; } }

.chat-suggestions { display: flex; flex-wrap: wrap; gap: 6px; padding: 8px 16px; border-top: 1px solid var(--border); }
.suggestion-chip { padding: 5px 11px; background: var(--accent-light); color: var(--accent); border: 1px solid var(--accent); border-radius: 20px; font-size: 0.75rem; font-weight: 600; cursor: pointer; transition: all 0.2s; white-space: nowrap; }
.suggestion-chip:hover { background: var(--accent); color: #fff; }

.chat-input-area { display: flex; align-items: center; gap: 8px; padding: 12px 16px; border-top: 1px solid var(--border); }
.chat-input-area input { flex: 1; padding: 9px 14px; border: 1px solid var(--border); border-radius: 20px; background: var(--bg-alt); color: var(--text); font-size: 0.85rem; font-family: var(--font); outline: none; transition: border-color 0.2s; }
.chat-input-area input:focus { border-color: var(--accent); }
.chat-input-area input::placeholder { color: var(--text-light); }
#chatSend { width: 36px; height: 36px; border-radius: 50%; background: var(--accent); color: #fff; border: none; cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 0.85rem; transition: background 0.2s, transform 0.2s; flex-shrink: 0; }
#chatSend:hover { background: var(--accent-dark); transform: scale(1.08); }

@media (max-width: 480px) {
  .chat-window { width: calc(100vw - 40px); }
}