@import url("https://fonts.googleapis.com/css2?family=Inter:ital,opsz,wght@0,14..32,100..900;1,14..32,100..900&display=swap");

:root {
  --font-main: "Inter", sans-serif;
  --font-heading: "Inter", sans-serif;

  --text-dark: #111111;
  --text-light: #525252;
  --text-muted: #888888;

  --bg-light: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.65);
  --border-glass: rgba(255, 255, 255, 0.6);
  --border-solid: rgba(0, 0, 0, 0.05);

  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 30px;
  --radius-pill: 100px;

  --transition-fast: 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-normal: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-slow: 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);

  --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 12px 35px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 25px 50px rgba(0, 0, 0, 0.06);
  --shadow-glass: 0 10px 40px rgba(0, 0, 0, 0.04);
}

/* Reset & Base */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 50px;
}

body {
  font-family: var(--font-main);
  color: var(--text-light);
  background-color: var(--bg-soft);
  background-image:
    radial-gradient(
      circle at 15% 50%,
      rgba(255, 255, 255, 0.8),
      transparent 30%
    ),
    radial-gradient(
      circle at 85% 30%,
      rgba(255, 255, 255, 0.6),
      transparent 30%
    );
  background-attachment: fixed;
  line-height: 1.7;
  overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  color: var(--text-dark);
  font-weight: 500;
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 60px;
  letter-spacing: 1px;
  text-transform: none;
  font-style: italic;
  position: relative;
  display: block;
  width: auto;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: width var(--transition-normal);
}

.section-title:hover::after {
  width: 80px;
}

.subsection-title {
  font-family: var(--font-heading);
  text-align: center;
  font-size: 1.2rem;
  font-weight: 600;
  margin: 40px 0 25px;
  color: var(--text-dark);
  font-style: italic;
  position: relative;
}

.note {
  text-align: center;
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 30px;
  font-style: italic;
}

/* Glassmorphism Utilities */
.glass {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-glass);
  border-radius: var(--radius-lg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 45px;
  font-family: var(--font-main);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-decoration: none;
  border-radius: var(--radius-pill);
  transition: all var(--transition-normal);
  cursor: pointer;
  border: none;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: linear-gradient(
    120deg,
    rgba(255, 255, 255, 0) 30%,
    rgba(255, 255, 255, 0.4) 50%,
    rgba(255, 255, 255, 0) 70%
  );
  background-size: 200% 100%;
  background-position: 100% 0;
  transition: all var(--transition-slow);
  z-index: -1;
}

.btn:hover::before {
  background-position: -100% 0;
}

.btn--primary {
  background-color: var(--primary);
  color: #fff;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
  text-transform: uppercase;
}

.btn--primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

.btn--secondary {
  background-color: transparent;
  color: var(--text-dark);
  border: 1px solid var(--text-dark);
  backdrop-filter: blur(4px);
  text-transform: uppercase;
}

.btn--secondary:hover {
  background-color: var(--text-dark);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

/* Header */
.header {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 100px 0;
  background: url("../img/header-bg.png") center/cover no-repeat;
  position: relative;
  transition: background var(--transition-slow);
}

.header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at top right, var(--bg-soft), transparent 60%),
    radial-gradient(
      circle at bottom left,
      rgba(255, 255, 255, 0.8),
      transparent 60%
    );
  z-index: 1;
}

@keyframes float {
  0% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(50px, 30px) scale(1.1);
  }
  100% {
    transform: translate(-20px, 60px) scale(0.9);
  }
}

.header__intro {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-lg);
  padding: 60px 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 40px;
  animation: slideUpFade 1s var(--transition-slow) forwards;
  opacity: 0;
  transform: translateY(30px);
  position: relative;
  z-index: 2;
}

@keyframes slideUpFade {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.header__logo {
  max-width: 450px;
  width: 100%;
  height: auto;
  transition: transform var(--transition-normal);
}

.header__logo:hover {
  transform: scale(1.02);
}

.header__contacts {
  display: flex;
  gap: 30px;
  flex-wrap: wrap;
  justify-content: center;
}

.contact-block {
  display: flex;
  align-items: center;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-dark);
  font-weight: 500;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid var(--border-glass);
  transition: var(--transition-fast);
}

.contact-link:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.contact-icon {
  width: 20px;
  height: 20px;
  object-fit: contain;
  transition: var(--transition-fast);
}

.contact-link:hover .contact-icon {
  filter: brightness(0) invert(1);
  transform: scale(1.1);
}

/* Price List & Tabs */
.price-list {
  position: relative;
}

.price-list::before {
  content: "";
  position: absolute;
  top: 10%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: var(--primary);
  opacity: 0.05;
  filter: blur(100px);
  border-radius: 50%;
  z-index: -1;
  max-width: 100vw;
  overflow: hidden;
}

.tabs__header {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin-bottom: 50px;
  flex-wrap: wrap;
}

.tab-btn {
  background: rgba(255, 255, 255, 0.4);
  border: 1px solid var(--border-solid);
  font-family: var(--font-main);
  font-size: 16px;
  font-weight: 500;
  color: var(--text-light);
  padding: 12px 30px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: var(--transition-normal);
  backdrop-filter: blur(10px);
}

.tab-btn:hover {
  background: rgba(255, 255, 255, 0.8);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
  color: var(--text-dark);
}

.tab-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.tab-panel,
.sub-tab-panel {
  display: none;
  animation: fadeInOut 0.5s ease forwards;
  opacity: 0;
}

.tab-panel.active,
.sub-tab-panel.active {
  display: block;
}

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

/* Sub Tabs */
.sub-tabs__header {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.sub-tab-btn {
  background: transparent;
  border: none;
  padding: 10px 20px;
  font-family: var(--font-main);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  position: relative;
  transition: var(--transition-fast);
}

.sub-tab-btn::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition-normal);
}

.sub-tab-btn:hover {
  color: var(--text-dark);
}

.sub-tab-btn.active {
  color: var(--primary);
}

.sub-tab-btn.active::after {
  width: 100%;
}

/* Price Table */
.price-table {
  width: 100%;
  max-width: 850px;
  margin: 0 auto 50px;
  border-collapse: separate;
  border-spacing: 0 12px;
}

.price-table tr {
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  transition: var(--transition-normal);
  border-radius: var(--radius-md);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
}

.price-table tr:hover {
  transform: scale(1.01) translateY(-2px);
  box-shadow: var(--shadow-md);
  background: #fff;
}

.price-table td {
  padding: 24px 30px;
  border: 1px solid var(--border-solid);
  border-style: solid none;
}

.price-table td:first-child {
  border-left: 1px solid var(--border-solid);
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  font-weight: 400;
  color: var(--text-dark);
  font-size: 15px;
}

.price-table td:last-child {
  border-right: 1px solid var(--border-solid);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  text-align: right;
  font-weight: 600;
  color: var(--primary);
  font-size: 16px;
  white-space: nowrap;
}

/* Accordion */
.education {
  position: relative;
}

.education::before {
  content: "";
  position: absolute;
  bottom: 10%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: var(--primary);
  opacity: 0.04;
  filter: blur(80px);
  border-radius: 50%;
  z-index: -1;
  max-width: 100vw;
  overflow: hidden;
}

.accordion {
  max-width: 900px;
  margin: 0 auto 50px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.accordion-item {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
}

.accordion-item:hover {
  box-shadow: var(--shadow-md);
  background: rgba(255, 255, 255, 0.9);
}

.accordion-item.active {
  background: #ffffff;
  border-color: var(--border-solid);
}

.accordion-header {
  width: 100%;
  background: transparent;
  border: none;
  padding: 25px 30px;
  text-align: left;
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
  color: var(--text-dark);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition-fast);
}

.accordion-header::after {
  content: "+";
  font-family: var(--font-main);
  font-size: 24px;
  font-weight: 300;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-soft);
  transition: all var(--transition-normal);
}

.accordion-item.active .accordion-header::after {
  content: "-";
  background: var(--primary);
  color: #fff;
  transform: rotate(90deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.accordion-content p,
.accordion-content ul {
  padding: 0 40px 30px;
  font-size: 15px;
  color: var(--text-light);
}

.accordion-content ul {
  padding-left: 60px;
}

.accordion-content li {
  margin-bottom: 12px;
  position: relative;
  list-style: none;
}

.accordion-content li::before {
  content: "";
  position: absolute;
  left: -20px;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}

.education__action {
  text-align: center;
  margin-top: 50px;
}

/* Portfolio Slider */
.portfolio {
  background: linear-gradient(to bottom, transparent, var(--bg-light));
}

.slider {
  position: relative;
  width: 100%;
  padding: 0 20px;
}

.slider__container {
  position: relative;
  width: 100%;
  overflow: hidden;
}

.slider__wrapper {
  display: flex;
  gap: 30px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 20px 0px 40px;
  scrollbar-width: none; /* Firefox */
}

.slider__wrapper::-webkit-scrollbar {
  display: none; /* Safari and Chrome */
}

.slider__item {
  flex: 0 0 calc(33.333% - 20px);
  scroll-snap-align: center;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transition: var(--transition-normal);
  position: relative;
}

.slider__item::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.4) 0%, transparent 40%);
  opacity: 0;
  transition: opacity var(--transition-fast);
  pointer-events: none;
}

.slider__item:hover::after {
  opacity: 1;
}

.slider__item img {
  width: 100%;
  height: 500px;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  display: block;
}

.slider__item:hover img {
  transform: scale(1.08);
}

.slider__btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 60px;
  height: 60px;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-glass);
  border-radius: 50%;
  cursor: pointer;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-normal);
  box-shadow: var(--shadow-sm);
  color: var(--text-dark);
}

.slider__btn:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  transform: translateY(-50%) scale(1.1);
  box-shadow: var(--shadow-md);
}

.slider__btn::after {
  content: "";
  width: 12px;
  height: 12px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  display: block;
}

.slider__btn--prev {
  left: 0;
}

.slider__btn--prev::after {
  transform: rotate(135deg);
  margin-left: 6px;
}

.slider__btn--next {
  right: 0;
}

.slider__btn--next::after {
  transform: rotate(-45deg);
  margin-right: 6px;
}

/* Footer */
.footer {
  background: #0f0f0f;
  color: #fff;
  padding: 100px 0 60px;
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: "";
  position: absolute;
  top: -50px;
  left: 0;
  right: 0;
  height: 100px;
  background: var(--bg-light);
  border-radius: 0 0 50% 50% / 0 0 100px 100px;
  z-index: 1;
}

.footer__container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 60px;
  position: relative;
  z-index: 2;
  margin-top: 40px;
}

.footer__contacts {
  flex: 1;
  max-width: 450px;
}

.footer__title {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 500;
  margin-bottom: 40px;
  color: #fff;
  font-style: italic;
}

.footer__name {
  font-size: 1.2rem;
  font-weight: 300;
  margin-bottom: 30px;
  color: rgba(255, 255, 255, 0.7);
}

.footer__contact-item {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 25px;
  padding-bottom: 25px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.footer__contact-item:last-child {
  border-bottom: none;
}

.footer__icon {
  width: 24px;
  height: 24px;
  filter: brightness(0) invert(1) opacity(0.5);
  transition: var(--transition-fast);
}

.footer__contact-item:hover .footer__icon {
  filter: brightness(0) invert(1) opacity(1);
}

.footer__contact-text a,
.footer__contact-text span {
  color: #fff;
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 400;
  letter-spacing: 0.5px;
  transition: var(--transition-fast);
}

.footer__contact-text a:hover {
  color: var(--primary);
}

.footer__map-wrapper {
  flex: 1.2;
  width: 100%;
}

.footer__map {
  width: 100%;
  height: 450px;
  background: #1a1a1a;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

/* Responsive */
@media (max-width: 1024px) {
  .header__intro {
    padding: 50px;
  }
  .slider__item {
    flex: 0 0 calc(50% - 15px);
  }
}

@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 1.8rem;
    margin-bottom: 40px;
  }

  .header__intro {
    padding: 40px 20px;
    width: 100%;
  }

  .header__logo {
    max-width: 280px;
  }

  .btn {
    padding: 16px 30px;
    width: 100%;
  }

  .header__contacts {
    flex-direction: column;
    width: 100%;
    align-items: stretch;
  }

  .contact-link {
    justify-content: center;
    width: 100%;
  }

  .tabs__header {
    flex-direction: column;
  }

  .tab-btn {
    width: 100%;
    margin-bottom: 0px;
  }

  .sub-tabs__header {
    flex-direction: column;
    gap: 8px;
  }

  .sub-tab-btn {
    width: 100%;
    padding: 14px;
    background: rgba(255, 255, 255, 0.4);
    border-radius: var(--radius-sm);
  }

  .sub-tab-btn.active {
    background: rgba(255, 255, 255, 0.8);
  }
  .sub-tab-btn::after {
    display: none;
  }

  /* Make price tables responsive blocks */
  .price-table,
  .price-table tbody {
    display: block;
    width: 100%;
  }

  .price-table tr {
    display: flex;
    flex-direction: column;
    margin-bottom: 15px;
    padding: 20px;
    border-radius: var(--radius-md);
  }

  .price-table td {
    display: block;
    padding: 5px 0;
    border: none;
    text-align: center;
  }

  .price-table td:first-child {
    border: none;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 10px;
  }

  .price-table td:last-child {
    border: none;
    font-size: 18px;
    text-align: center;
  }

  .accordion-header {
    font-size: 16px;
    padding: 20px;
  }

  .accordion-header::after {
    width: 28px;
    height: 28px;
    font-size: 20px;
  }

  .accordion-content p,
  .accordion-content ul {
    padding: 0 20px 20px;
  }

  .accordion-content ul {
    padding-left: 30px;
  }

  .footer__container {
    flex-direction: column;
    gap: 40px;
  }

  .footer__contacts,
  .footer__map-wrapper {
    max-width: 100%;
  }
}

@media (max-width: 576px) {
  .slider__item {
    flex: 0 0 calc(100% - 20px);
  }
}