:root {
  --bg: #f4f6f8;
  --bg-gradient: linear-gradient(165deg, #eef2f7 0%, #f8fafb 40%, #eef3f6 100%);
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --text: #1f2937;
  --muted: #526071;
  --accent: #0f766e;
  --border: #d6dde5;
  --shadow: 0 14px 34px rgba(15, 23, 42, 0.08);
  --toggle-active-bg: #d9eeea;
  --toggle-active-border: #9ccfc8;
  --toggle-active-text: #0f5f59;
  --modal-backdrop: rgba(15, 23, 42, 0.55);
  --card-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
  --card-shadow-hover: 0 14px 28px rgba(15, 23, 42, 0.1);
}

body.theme-dark {
  --bg: #0f1720;
  --bg-gradient: linear-gradient(165deg, #0d141d 0%, #111a26 40%, #0f1720 100%);
  --surface: #162231;
  --surface-soft: #1d2b3d;
  --text: #e6edf6;
  --muted: #b3c1d1;
  --accent: #39b7aa;
  --border: #2d3d52;
  --shadow: 0 14px 34px rgba(0, 0, 0, 0.38);
  --toggle-active-bg: #1d4f4a;
  --toggle-active-border: #2f726b;
  --toggle-active-text: #c8f4ee;
  --modal-backdrop: rgba(3, 8, 14, 0.7);
  --card-shadow: 0 10px 24px rgba(0, 0, 0, 0.32);
  --card-shadow-hover: 0 14px 30px rgba(0, 0, 0, 0.44);
}

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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background: var(--bg-gradient);
  line-height: 1.6;
  transition: background 0.25s ease, color 0.25s ease;
  position: relative;
  overflow-x: hidden;
}

.container {
  width: min(1100px, 92%);
  margin: 0 auto;
}

.bg-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(10px);
  pointer-events: none;
  z-index: -1;
  opacity: 0.25;
  animation: floatOrb 9s ease-in-out infinite;
}

.bg-orb.orb-a {
  width: 280px;
  height: 280px;
  top: -80px;
  right: -70px;
  background: radial-gradient(circle, #4fb6aa 0%, rgba(79, 182, 170, 0.12) 65%, transparent 100%);
}

.bg-orb.orb-b {
  width: 230px;
  height: 230px;
  bottom: 10%;
  left: -80px;
  background: radial-gradient(circle, #6f96d8 0%, rgba(111, 150, 216, 0.1) 65%, transparent 100%);
  animation-delay: 1.4s;
}

.hero {
  padding: 72px 0 40px;
}

.hero-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 36px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 18px;
  animation: fadeUp 0.65s ease both;
}

.hero-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-content {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 18px;
  align-items: stretch;
}

.hero-main {
  display: grid;
  gap: 12px;
}

.hero-panel {
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
  display: grid;
  gap: 12px;
  box-shadow: var(--card-shadow);
}

.hero-panel h3 {
  font-size: 1.02rem;
}

.hero-panel p {
  color: var(--muted);
  font-size: 0.94rem;
  max-width: none;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  text-align: center;
}

.stat span {
  display: block;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.1;
}

.stat small {
  color: var(--muted);
  font-size: 0.78rem;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.lang-switch {
  display: flex;
  gap: 8px;
}

.lang-btn,
.theme-btn {
  border: 1px solid var(--border);
  background: var(--surface-soft);
  color: var(--text);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 0.86rem;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.theme-btn {
  width: 36px;
  height: 36px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--accent);
  background: var(--surface);
}

.theme-btn svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.9;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.theme-btn:hover {
  border-color: var(--toggle-active-border);
  background: var(--surface-soft);
}

.lang-btn.active {
  background: var(--toggle-active-bg);
  border-color: var(--toggle-active-border);
  color: var(--toggle-active-text);
  font-weight: 600;
}

.eyebrow {
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.86rem;
}

h1 {
  font-size: clamp(1.8rem, 3.8vw, 2.8rem);
  line-height: 1.2;
}

.hero p {
  color: var(--muted);
  max-width: 70ch;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}

.badge {
  background: var(--surface-soft);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 0.92rem;
}

.assistant-btn {
  border: 1px solid var(--toggle-active-border);
  background: var(--toggle-active-bg);
  color: var(--toggle-active-text);
  border-radius: 12px;
  padding: 9px 12px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.assistant-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--card-shadow);
}

.assistant-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.assistant-status {
  font-size: 0.88rem;
  min-height: 20px;
}

.chat-fab {
  position: fixed;
  right: 22px;
  bottom: 22px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 1px solid var(--toggle-active-border);
  background: var(--toggle-active-bg);
  color: var(--toggle-active-text);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
  z-index: 30;
}

.chat-fab svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

.chat-widget {
  position: fixed;
  right: 22px;
  bottom: 88px;
  width: min(390px, calc(100vw - 24px));
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 12px;
  z-index: 30;
  display: none;
  gap: 10px;
}

.chat-widget.open {
  display: grid;
}

.chat-widget-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.chat-widget-header h3 {
  font-size: 1rem;
}

.chat-widget-close {
  border: 1px solid var(--border);
  background: var(--surface-soft);
  color: var(--text);
  border-radius: 10px;
  width: 30px;
  height: 30px;
  cursor: pointer;
}

.chat-box {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-soft);
  min-height: 220px;
  max-height: 340px;
  overflow-y: auto;
  padding: 10px;
  display: grid;
  gap: 8px;
  align-content: start;
}

.chat-row {
  max-width: 90%;
  padding: 8px 10px;
  border-radius: 10px;
  font-size: 0.92rem;
  white-space: pre-wrap;
}

.chat-row.user {
  margin-left: auto;
  background: var(--toggle-active-bg);
  border: 1px solid var(--toggle-active-border);
  color: var(--toggle-active-text);
}

.chat-row.bot {
  margin-right: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
}

.chat-row.typing {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-width: 52px;
}

.chat-row.typing span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--muted);
  opacity: 0.38;
  animation: typingPulse 1s infinite ease-in-out;
}

.chat-row.typing span:nth-child(2) {
  animation-delay: 0.16s;
}

.chat-row.typing span:nth-child(3) {
  animation-delay: 0.32s;
}

.chat-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}

.chat-form input {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 9px 10px;
  background: var(--surface-soft);
  color: var(--text);
}

section {
  padding: 22px 0 50px;
}

.section-title {
  margin-bottom: 18px;
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
}

.domain-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 16px;
}

.filter-btn {
  border: 1px solid var(--border);
  background: var(--surface-soft);
  color: var(--muted);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 0.88rem;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.filter-btn.active {
  color: var(--toggle-active-text);
  border-color: var(--toggle-active-border);
  background: var(--toggle-active-bg);
}

.portfolio-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 18px;
  box-shadow: var(--card-shadow);
  display: grid;
  gap: 12px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  grid-column: span 6;
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--card-shadow-hover);
  border-color: var(--toggle-active-border);
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0.8;
}

.card h3 {
  font-size: 1.2rem;
}

.card p {
  color: var(--muted);
}

.image-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.image-row img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #dde5ed;
}

.card-hint {
  color: var(--muted);
  font-size: 0.94rem;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.skills-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 18px;
  box-shadow: var(--card-shadow);
  display: grid;
  gap: 10px;
}

.skills-card h3 {
  font-size: 1rem;
}

.skills-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.skill-item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  min-height: 46px;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.skill-item:hover {
  border-color: var(--toggle-active-border);
  background: var(--surface);
  transform: translateY(-1px);
}

#skills .skills-card:first-child .skill-item {
  min-height: 40px;
  padding: 7px;
}

.skill-icon {
  font-size: 1.35rem;
  width: 24px;
  text-align: center;
  color: var(--muted);
  filter: grayscale(1) saturate(0);
}

.skill-logo {
  width: 24px;
  height: 24px;
  object-fit: contain;
  opacity: 0.95;
}

.skill-logo-dark {
  display: none;
}

body.theme-dark .skill-logo-light {
  display: none;
}

body.theme-dark .skill-logo-dark {
  display: block;
}

.contact-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px;
  box-shadow: var(--card-shadow);
}

.contact-list {
  list-style: none;
  display: grid;
  gap: 8px;
  color: var(--muted);
  margin-top: 8px;
}

.contact-list strong {
  color: var(--text);
  min-width: 92px;
  display: inline-block;
}

.contact-icons {
  margin-top: 12px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.contact-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface-soft);
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: transform 0.2s ease, color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.contact-icon svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.contact-icon:hover {
  transform: translateY(-2px);
  color: var(--accent);
  border-color: var(--toggle-active-border);
  background: var(--surface);
}

footer {
  text-align: center;
  color: var(--muted);
  padding: 14px 0 30px;
  font-size: 0.92rem;
}

.modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: var(--modal-backdrop);
  z-index: 20;
}

.modal.open {
  display: flex;
}

.modal-content {
  width: min(900px, 100%);
  max-height: 90vh;
  overflow: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 20px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 12px;
}

.modal.open .modal-content {
  animation: modalIn 0.24s ease;
}

.modal-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 12px;
}

.modal-close {
  border: 1px solid var(--border);
  background: var(--surface-soft);
  color: var(--text);
  border-radius: 10px;
  padding: 6px 10px;
  cursor: pointer;
}

.modal-desc {
  color: var(--muted);
  white-space: pre-line;
}

.modal-tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 2px;
}

.case-study {
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  display: grid;
  gap: 10px;
}

.case-study h4 {
  font-size: 1.02rem;
}

.case-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.case-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  display: grid;
  gap: 4px;
}

.case-item h5 {
  color: var(--accent);
  font-size: 0.86rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.case-item p {
  color: var(--muted);
  font-size: 0.9rem;
}

.portfolio-grid .card:nth-child(1),
.portfolio-grid .card:nth-child(4) {
  grid-column: span 7;
}

.portfolio-grid .card:nth-child(2),
.portfolio-grid .card:nth-child(5) {
  grid-column: span 5;
}

.portfolio-grid .card:nth-child(3),
.portfolio-grid .card:nth-child(6) {
  grid-column: span 6;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.985);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes typingPulse {
  0%,
  80%,
  100% {
    transform: scale(0.7);
    opacity: 0.35;
  }
  40% {
    transform: scale(1);
    opacity: 0.95;
  }
}

@keyframes floatOrb {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-12px);
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}

@media (max-width: 880px) {
  .hero-content {
    grid-template-columns: 1fr;
  }

  .portfolio-grid {
    grid-template-columns: 1fr 1fr;
  }

  .skills-grid {
    grid-template-columns: 1fr;
  }

  .skills-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .portfolio-grid .card:nth-child(n) {
    grid-column: auto;
  }

  .image-row {
    grid-template-columns: 1fr 1fr;
  }

  .case-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .hero-box {
    padding: 24px;
  }

  .header-controls {
    width: 100%;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  .image-row {
    grid-template-columns: 1fr;
  }

  .image-row img {
    height: 210px;
  }

  .chat-fab {
    right: 14px;
    bottom: 14px;
  }

  .chat-widget {
    right: 10px;
    bottom: 78px;
    width: calc(100vw - 20px);
  }
}