:root {
  --sidebar-bg: #202123;
  --main-bg: #343541;
  --surface-bg: #3f404d;
  --bubble-bg: #444654;
  --typing-bg: #4b4d5d;
  --text-primary: #ececf1;
  --text-muted: #c8c9d1;
  --border: #4d4f5e;
  --accent: #10a37f;
  --chip-bg: #3c3e4c;
  --chip-border: #5b5d6d;
  --panel-muted-bg: rgba(255, 255, 255, 0.04);
  --control-bg: #404250;
  --control-soft-bg: #2a2b34;
  --control-soft-hover: #343645;
  --welcome-muted: rgba(236, 236, 241, 0.78);
  --quote-label-color: rgba(236, 236, 241, 0.62);
  --quote-text-color: rgba(236, 236, 241, 0.76);
  --input-placeholder: rgba(206, 209, 220, 0.72);
  --scroll-track: rgba(255, 255, 255, 0.06);
  --scroll-thumb: rgba(255, 255, 255, 0.24);
  --scroll-thumb-hover: rgba(255, 255, 255, 0.36);
}

html {
  scroll-behavior: smooth;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Modern adaptive scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--scroll-thumb) var(--scroll-track);
}

*::-webkit-scrollbar {
  width: 9px;
  height: 9px;
}

*::-webkit-scrollbar-track {
  background: var(--scroll-track);
  border-radius: 999px;
}

*::-webkit-scrollbar-thumb {
  background: var(--scroll-thumb);
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: padding-box;
}

*::-webkit-scrollbar-thumb:hover {
  background: var(--scroll-thumb-hover);
}

body {
  font-family:
    Inter,
    system-ui,
    -apple-system,
    Segoe UI,
    Roboto,
    Helvetica,
    Arial,
    sans-serif;
  background: var(--main-bg);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  transition:
    background-color 0.3s ease,
    color 0.3s ease;
}

.app {
  display: flex;
  min-height: 100vh;
  overflow-x: hidden;
  transition:
    background-color 0.3s ease,
    color 0.3s ease;
}

.sidebar {
  width: 260px;
  background: var(--sidebar-bg);
  border-right: 1px solid #2d2f35;
  padding: 1rem;
  position: fixed;
  inset: 0 auto 0 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: transform 0.28s ease;
  z-index: 20;
}

.sidebar-footer {
  margin-top: auto;
}

.sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  font-size: 1.1rem;
  font-weight: 600;
}

.close-sidebar,
.menu-toggle {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 8px;
  padding: 0.35rem 0.55rem;
  cursor: pointer;
}

.nav {
  display: grid;
  gap: 0.65rem;
}

.nav-item {
  width: 100%;
  text-align: left;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  padding: 0.75rem;
  border-radius: 10px;
  cursor: pointer;
  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease,
    transform 0.2s ease;
}

.nav-icon {
  width: 16px;
  height: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  opacity: 0.9;
}

.nav-icon svg {
  width: 100%;
  height: 100%;
  fill: currentColor;
}

.nav-item::before {
  content: "";
  position: absolute;
  left: 0.45rem;
  top: 50%;
  width: 3px;
  height: 0;
  border-radius: 2px;
  background: var(--accent);
  transform: translateY(-50%);
  transition: height 0.2s ease;
}

.nav-item:hover,
.nav-item:focus-visible {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border);
  color: var(--text-primary);
  transform: translateX(2px);
}

.nav-item.active {
  background: rgba(16, 163, 127, 0.16);
  border-color: rgba(16, 163, 127, 0.45);
  color: var(--text-primary);
}

.nav-item.active::before {
  height: 65%;
}

.sidebar-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  z-index: 15;
}

.main {
  margin-left: 260px;
  width: calc(100% - 260px);
  padding: 1.5rem;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 1rem;
  height: 100vh;
}

.main-header {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding-right: 170px;
}

.main-header h2 {
  font-size: 1.2rem;
}

.menu-toggle {
  display: none;
}

.social-links {
  position: fixed;
  top: 1rem;
  right: 1rem;
  display: flex;
  gap: 0.5rem;
  z-index: 30;
}

.social-icon {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel-muted-bg);
  color: var(--text-primary);
  transition:
    border-color 0.2s ease,
    color 0.2s ease,
    box-shadow 0.2s ease,
    transform 0.2s ease;
}

.social-icon svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.social-icon:hover,
.social-icon:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 16px rgba(16, 163, 127, 0.22);
  transform: translateY(-1px);
}

.chat-shell {
  background: var(--surface-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  min-height: 260px;
  height: 100%;
  overflow-y: auto;
  scroll-behavior: smooth;
  padding: 1.35rem;
  transition:
    opacity 0.22s ease,
    transform 0.22s ease;
  font-size: 1rem;
  margin: 0 auto;
  width: min(100%, 980px);
}

.chat-shell.section-switching {
  opacity: 0.35;
  transform: translateY(4px);
}

.chat-thread {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-height: 100%;
  justify-content: flex-start;
  max-width: 840px;
  margin: 0 auto;
}

.welcome-screen {
  min-height: 100%;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 1rem;
  text-align: center;
  width: min(100%, 860px);
}

.welcome-title {
  font-size: clamp(1.4rem, 2.8vw, 2rem);
  font-weight: 600;
  color: var(--text-primary);
}

.welcome-intro {
  max-width: 760px;
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--welcome-muted);
  text-align: center;
}

.welcome-headline {
  font-size: clamp(1.45rem, 3vw, 2.2rem);
  line-height: 1.25;
  text-align: center;
  color: var(--text-primary);
}

.welcome-cta {
  padding: 0.52rem 0.95rem;
  font-weight: 600;
}

.flux-block {
  width: min(100%, 760px);
  border: 1px solid var(--border);
  background: var(--panel-muted-bg);
  border-radius: 14px;
  padding: 0.85rem;
  display: grid;
  gap: 0.45rem;
  justify-items: center;
  text-align: center;
}

.flux-block h2 {
  font-size: 1.05rem;
}

.flux-block p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.welcome-quote-label {
  margin-top: 0.2rem;
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--quote-label-color);
}

.welcome-quote {
  margin-top: 0.1rem;
  color: var(--quote-text-color);
  font-size: 0.83rem;
  text-align: center;
  font-style: italic;
}

.coffee-btn {
  margin-top: 0.2rem;
}

.welcome-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
}

.welcome-chip {
  padding: 0.5rem 0.9rem;
  font-size: 0.9rem;
}

.message-row {
  display: flex;
  justify-content: flex-start;
}

.project-grid-row {
  width: 100%;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 0.75rem;
}

.project-card {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--bubble-bg);
  padding: 0.7rem;
  display: grid;
  gap: 0.45rem;
}

.project-image {
  aspect-ratio: 16 / 9;
  border-radius: 10px;
  border: 1px solid var(--border);
  overflow: hidden;
  position: relative;
  background: var(--panel-muted-bg);
}

.project-image-media {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.project-image-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(0, 0, 0, 0.05) 30%,
    rgba(0, 0, 0, 0.45) 100%
  );
  pointer-events: none;
}

.project-card h4 {
  font-size: 0.95rem;
}

.project-card p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.45;
}

.project-card small {
  font-size: 0.72rem;
  color: var(--text-primary);
  opacity: 0.8;
}

.project-view {
  border: 1px solid var(--border);
  background: var(--chip-bg);
  color: var(--text-primary);
  border-radius: 9px;
  padding: 0.35rem 0.55rem;
  font-size: 0.78rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  transition:
    border-color 0.2s ease,
    background 0.2s ease,
    color 0.2s ease;
}

.project-view:hover,
.project-view:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(16, 163, 127, 0.08);
}

.project-view:disabled {
  opacity: 0.58;
  cursor: not-allowed;
  background: transparent;
  border-style: dashed;
}

.contact-form-card {
  width: min(100%, 700px);
  display: grid;
  gap: 0.55rem;
}

.contact-input {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--panel-muted-bg);
  color: var(--text-primary);
  border-radius: 10px;
  padding: 0.6rem 0.7rem;
  font: inherit;
}

.contact-input:focus {
  outline: 2px solid rgba(16, 163, 127, 0.35);
  outline-offset: 1px;
}

textarea.contact-input {
  min-height: 92px;
  resize: vertical;
}

.contact-submit {
  justify-self: end;
  border: 1px solid var(--border);
  background: var(--chip-bg);
  color: var(--text-primary);
  border-radius: 9px;
  padding: 0.4rem 0.75rem;
  cursor: pointer;
}

.message-row.user {
  justify-content: flex-end;
}

.message {
  max-width: min(100%, 700px);
  background: var(--bubble-bg);
  border: 1px solid var(--border);
  border-radius: 18px;
  border-top-left-radius: 8px;
  padding: 0.86rem 1.02rem;
  color: var(--text-muted);
  line-height: 1.5;
  font-weight: 500;
  opacity: 0;
  transform: translateY(8px);
  transition:
    opacity 0.25s ease,
    transform 0.25s ease,
    box-shadow 0.25s ease;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
  box-shadow: 0 3px 14px rgba(0, 0, 0, 0.18);
}

.message.show {
  opacity: 1;
  transform: translateY(0);
}

.message.user {
  background: rgba(16, 163, 127, 0.2);
  border-color: rgba(16, 163, 127, 0.55);
  color: var(--text-primary);
}

.skills-message {
  width: min(100%, 700px);
  display: grid;
  gap: 0.7rem;
}

.skill-item {
  display: grid;
  gap: 0.35rem;
}

.skill-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.88rem;
  color: var(--text-primary);
}

.skill-track {
  width: 100%;
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  overflow: hidden;
}

.skill-fill {
  width: 0;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, #10a37f, #19c39b);
  transition: width 0.85s ease;
}

.skill-fill.animate {
  width: var(--target-width);
}

.resume-message {
  width: min(100%, 700px);
}

.resume-viewer {
  width: 100%;
  height: 280px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
}

.resume-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 0.6rem;
}

.flux-quotes {
  width: min(100%, 700px);
  display: grid;
  gap: 0.4rem;
}

.flux-quotes p {
  font-style: italic;
  color: var(--text-primary);
}

.resume-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  color: var(--text-primary);
  text-decoration: none;
  padding: 0.55rem 0.9rem;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  transition:
    border-color 0.2s ease,
    background 0.2s ease,
    color 0.2s ease;
}

.resume-download:hover,
.resume-download:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(16, 163, 127, 0.08);
}

.coffee-screen {
  min-height: 100%;
  width: min(100%, 700px);
  margin: 0 auto;
  display: grid;
  align-content: center;
  justify-items: center;
  text-align: center;
  gap: 0.8rem;
}

.coffee-title {
  font-size: clamp(1.1rem, 2.4vw, 1.35rem);
  color: var(--text-primary);
}

.coffee-subtext {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.55;
}

.coffee-support-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  min-width: 128px;
  padding: 0.6rem 1rem;
  border-radius: 999px;
  border: 1px solid rgba(16, 163, 127, 0.5);
  background: rgba(16, 163, 127, 0.14);
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    background 0.2s ease,
    border-color 0.2s ease;
}

.coffee-support-btn:hover,
.coffee-support-btn:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 0 18px rgba(16, 163, 127, 0.24);
  background: rgba(16, 163, 127, 0.2);
  border-color: rgba(16, 163, 127, 0.72);
}

.coffee-note {
  color: var(--quote-text-color);
  font-size: 0.82rem;
}

.message.typing {
  width: 72px;
  min-height: 40px;
  background: var(--typing-bg);
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.typing-dots {
  display: inline-flex;
  gap: 0.22rem;
}

.typing-dots span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #d5d7e1;
  opacity: 0.4;
  animation: dotPulse 1s infinite ease-in-out;
}

.typing-dots span:nth-child(2) {
  animation-delay: 0.15s;
}

.typing-dots span:nth-child(3) {
  animation-delay: 0.3s;
}

.message.first-load {
  animation: firstMessageFade 0.55s ease;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  opacity: 0;
  transform: translateY(8px);
  transition:
    opacity 0.25s ease,
    transform 0.25s ease;
}

.chip-row.show {
  opacity: 1;
  transform: translateY(0);
}

.suggestion-chip {
  border: 1px solid var(--chip-border);
  background: var(--chip-bg);
  color: var(--text-primary);
  border-radius: 999px;
  padding: 0.4rem 0.8rem;
  font-size: 0.86rem;
  cursor: pointer;
  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    transform 0.2s ease;
}

.suggestion-chip:hover,
.suggestion-chip:focus-visible {
  background: #4a4c5c;
  border-color: #737689;
  transform: translateY(-1px);
}

.theme-toggle {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--control-soft-bg);
  color: var(--text-primary);
  border-radius: 10px;
  padding: 0.65rem 0.75rem;
  cursor: pointer;
  text-align: left;
  transition:
    background 0.2s ease,
    border-color 0.2s ease;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  background: var(--control-soft-hover);
  border-color: #6b6e81;
}

body.light-mode {
  --sidebar-bg: #eceef5;
  --main-bg: #f6f7fb;
  --surface-bg: #ffffff;
  --bubble-bg: #f4f5fb;
  --typing-bg: #eceff7;
  --text-primary: #1f2430;
  --text-muted: #4d5568;
  --border: #d4d9e7;
  --chip-bg: #eef1f8;
  --chip-border: #c6cfe3;
  --panel-muted-bg: rgba(31, 36, 48, 0.04);
  --control-bg: #edf1fa;
  --control-soft-bg: #e7ebf7;
  --control-soft-hover: #dce4f7;
  --welcome-muted: #3f4b61;
  --quote-label-color: #5a677f;
  --quote-text-color: #2f3a4f;
  --input-placeholder: #7d879f;
  --scroll-track: rgba(31, 36, 48, 0.08);
  --scroll-thumb: rgba(65, 77, 102, 0.32);
  --scroll-thumb-hover: rgba(65, 77, 102, 0.48);
}

.fake-input-bar {
  width: min(100%, 980px);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.6rem;
  padding: 0.55rem;
  border: 1px solid var(--border);
  background: var(--control-bg);
  border-radius: 14px;
  transition:
    opacity 0.22s ease,
    transform 0.22s ease,
    max-height 0.22s ease,
    padding 0.22s ease,
    border-width 0.22s ease;
  max-height: 72px;
}

.fake-input-bar.hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
  border-width: 0;
  overflow: hidden;
}

.fake-input {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid transparent;
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  border-radius: 10px;
  padding: 0.45rem 0.55rem;
}

.fake-input:focus-visible {
  border-color: rgba(16, 163, 127, 0.42);
  background: rgba(16, 163, 127, 0.06);
}

.fake-input::placeholder {
  color: var(--input-placeholder);
}

.fake-send {
  border: 0;
  border-radius: 10px;
  width: 34px;
  height: 34px;
  background: #5b5e70;
  color: #dfe1eb;
  opacity: 0.7;
}

@media (min-width: 769px) and (max-width: 1100px) {
  .main {
    padding: 1.1rem;
  }

  .chat-shell,
  .fake-input-bar {
    width: min(100%, 900px);
  }
}

@keyframes dotPulse {
  0%,
  80%,
  100% {
    opacity: 0.35;
    transform: translateY(0);
  }
  40% {
    opacity: 1;
    transform: translateY(-2px);
  }
}

@keyframes firstMessageFade {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.sidebar,
.main,
.chat-shell,
.message,
.suggestion-chip,
.theme-toggle,
.fake-input-bar,
.social-icon {
  transition-duration: 0.25s;
  transition-timing-function: ease;
}

@media (max-width: 768px) {
  .sidebar {
    width: min(84vw, 300px);
    transform: translateX(-100%);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  body.menu-open .sidebar-backdrop {
    opacity: 1;
    pointer-events: auto;
  }

  .main {
    margin-left: 0;
    width: 100%;
    padding: 0.85rem;
    gap: 0.85rem;
  }

  .main-header {
    padding-right: 136px;
  }

  .main-header h2 {
    font-size: 1.05rem;
  }

  .social-links {
    top: 0.7rem;
    right: 0.75rem;
    gap: 0.35rem;
  }

  .social-icon {
    width: 32px;
    height: 32px;
    border-radius: 9px;
  }

  .social-icon svg {
    width: 16px;
    height: 16px;
  }

  .chat-shell {
    height: 100%;
    min-height: 0;
    padding: 1rem;
    font-size: 0.95rem;
    width: 100%;
  }

  .fake-input-bar {
    width: 100%;
    padding: 0.5rem;
    gap: 0.5rem;
  }

  .fake-input {
    font-size: 0.9rem;
  }

  .chat-thread {
    gap: 0.85rem;
  }

  .message {
    width: 100%;
    max-width: 100%;
    padding: 0.74rem 0.86rem;
    line-height: 1.45;
  }

  .chip-row {
    gap: 0.45rem;
  }

  .suggestion-chip {
    font-size: 0.8rem;
    padding: 0.36rem 0.68rem;
  }

  .welcome-title {
    font-size: 1.35rem;
  }

  .welcome-intro {
    font-size: 0.86rem;
  }

  .welcome-headline {
    font-size: 1.35rem;
  }

  .flux-block {
    padding: 0.75rem;
  }

  .welcome-quote-label {
    font-size: 0.7rem;
  }

  .welcome-quote {
    font-size: 0.78rem;
  }

  .menu-toggle,
  .close-sidebar {
    display: inline-flex;
    align-items: center;
    justify-content: flex-start;
  }
}

@media (min-width: 769px) {
  .close-sidebar {
    display: none;
  }
}