/* ===== VARIABLES ===== */
:root {
  /* Colores */
  --primary-gradient: linear-gradient(147deg, #4d4855 0%, #2f2c2c 74%);
  --header-gradient: linear-gradient(147deg, #4d4855 0%, #000000 74%);
  --text-light: #ffffff;
  --text-dark: #1c1c1e;
  --bg-light: #f9f9f9;
  --border-dark: #000;
  --scroll-bg: #e1e1e1;
  --scroll-hover: #d0d0d0;
  --active-color: #4d4855;
  --card-hover-shadow: 0 20px 30px rgba(0, 0, 0, 0.15);
  --link-hover-bg: rgba(255, 255, 255, 0.3);

  /* Tipografía */
  --font-primary: "Inter", sans-serif;

  /* Espaciado */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 5rem;

  /* Bordes */
  --radius-sm: 5px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 50%;

  /* Sombras */
  --shadow-sm: 0 2px 5px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.05);

  /* Transiciones */
  --transition-fast: all 0.2s ease;
  --transition-base: all 0.3s ease;
  --transition-bounce: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 1.5);
}

/* ===== RESET Y BASE ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  margin: 0;
  padding: 0;
  text-align: center;
  background-color: var(--bg-light);
  color: var(--text-dark);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

/* ===== TIPOGRAFÍA ===== */
h1 {
  font-size: clamp(1.8rem, 5vw, 2.5rem);
  margin-bottom: var(--space-md);
}

h2 {
  border-bottom: 2px solid var(--border-dark);
  display: inline-block;
  padding-bottom: var(--space-xs);
  font-weight: 600;
  letter-spacing: -0.5px;
  color: #111;
  font-size: clamp(1.8rem, 4vw, 2.2rem);
  margin-bottom: var(--space-xl);
}

h3 {
  color: var(--text-light);
  font-size: clamp(1.3rem, 3vw, 1.6rem);
  margin-bottom: var(--space-sm);
}

/* ===== HEADER ===== */
.header {
  background-image: var(--header-gradient);
  color: var(--text-light);
  padding: var(--space-xl) var(--space-md);
  position: relative;
  width: 100%;
}

/* Foto de perfil */
.profile-photo {
  width: clamp(120px, 20vw, 150px);
  height: clamp(120px, 20vw, 150px);
  border-radius: var(--radius-full);
  object-fit: cover;
  display: block;
  margin: 0 auto var(--space-md);
  border: 3px solid rgba(255, 255, 255, 0.2);
  transition: var(--transition-base);
}

.profile-photo:hover {
  transform: scale(1.05);
  border-color: rgba(255, 255, 255, 0.5);
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

/* Navegación */
.header__nav {
  margin-top: var(--space-lg);
}

.header__nav ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(var(--space-md), 4vw, var(--space-xl));
}

.header__nav ul li a {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 600;
  font-size: clamp(1rem, 2vw, 1.1rem);
  padding: var(--space-xs) var(--space-sm);
  transition: var(--transition-base);
  position: relative;
}

/* Efecto hover para enlaces de navegación */
.header__nav ul li a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--text-light);
  transition: width 0.3s ease;
}

.header__nav ul li a:hover::after {
  width: 100%;
}

/* Enlace activo (subrayado) */
.header__nav ul li a.active {
  text-decoration: underline;
  text-underline-offset: 5px;
  text-decoration-thickness: 2px;
}

/* ===== BOTONES DE IDIOMA ===== */
.language-buttons {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  z-index: 100;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  padding: var(--space-xs);
  border-radius: var(--radius-md);
  backdrop-filter: blur(5px);
}

.language-buttons button {
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid white;
  color: white;
  padding: clamp(0.3rem, 1.5vw, 0.5rem) clamp(0.6rem, 2vw, 1rem);
  font-size: clamp(0.8rem, 2vw, 0.9rem);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-bounce);
  min-width: 45px;
  font-weight: 500;
}

.language-buttons button:hover {
  background: rgba(255, 255, 255, 0.4);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.language-buttons button.active {
  background: white;
  color: #4d4855;
  font-weight: bold;
  transform: scale(1.05);
}

/* ===== SECCIONES ===== */
.section {
  padding: clamp(var(--space-2xl), 8vw, var(--space-3xl)) var(--space-md);
  max-width: 1200px;
  margin: 0 auto;
  line-height: 1.6;
  animation: fadeIn 0.8s ease-in-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== ABOUT PAGE ===== */
.about__content {
  max-width: 800px;
  margin: 0 auto;
  text-align: left;
  padding: var(--space-xl);
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transition: var(--transition-base);
}

.about__content:hover {
  box-shadow: var(--card-hover-shadow);
  transform: translateY(-5px);
}

.about__text {
  font-size: clamp(1rem, 2vw, 1.1rem);
  margin-bottom: var(--space-lg);
  line-height: 1.8;
}

.about__subtitle {
  color: var(--active-color);
  margin-bottom: var(--space-md);
  font-size: clamp(1.2rem, 3vw, 1.4rem);
  border-left: 4px solid var(--active-color);
  padding-left: var(--space-md);
}

.about__skills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.about__skill {
  background: var(--primary-gradient);
  color: white;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  transition: var(--transition-bounce);
}

.about__skill:hover {
  transform: scale(1.1) translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ===== PROYECTOS ===== */
.projects {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  padding: var(--space-xl) var(--space-md);
  max-width: 1400px;
  margin: 0 auto;
}

.project__card {
  background-image: var(--header-gradient);
  border-radius: var(--radius-lg);
  padding: clamp(var(--space-lg), 4vw, var(--space-xl));
  box-shadow: var(--shadow-lg);
  transition: var(--transition-bounce);
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
  position: relative;
  overflow: hidden;
}

.project__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.1),
    transparent
  );
  transition: left 0.5s ease;
}

.project__card:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: var(--card-hover-shadow);
}

.project__card:hover::before {
  left: 100%;
}

.project__card-text {
  color: var(--text-light);
  margin-bottom: var(--space-lg);
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

.project-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md);
  position: relative;
  z-index: 1;
}

.project-links a {
  background-image: var(--primary-gradient);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: clamp(0.6rem, 2vw, 0.8rem) clamp(1rem, 3vw, 1.5rem);
  border-radius: var(--radius-md);
  font-size: clamp(0.9rem, 2vw, 1rem);
  transition: var(--transition-bounce);
  color: var(--text-light);
  text-decoration: none;
  display: inline-block;
  font-weight: 500;
  position: relative;
  overflow: hidden;
}

.project-links a::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition:
    width 0.5s,
    height 0.5s;
}

.project-links a:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: var(--shadow-md);
  border-color: white;
}

.project-links a:hover::before {
  width: 200px;
  height: 200px;
}

/* Tablets - 2 columnas */
@media (min-width: 768px) and (max-width: 1024px) {
  .projects {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
  }

  .project__card {
    margin: 0;
    max-width: none;
    height: 100%;
    display: flex;
    flex-direction: column;
  }

  .project-links {
    margin-top: auto;
  }
}

/* Desktop - 3 columnas */
@media (min-width: 1025px) {
  .projects {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
  }

  .project__card {
    margin: 0;
    max-width: none;
    height: 100%;
    display: flex;
    flex-direction: column;
  }

  .project-links {
    margin-top: auto;
  }
}

/* ===== CONTACT PAGE ===== */
.contact__content {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--space-xl);
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transition: var(--transition-base);
}

.contact__content:hover {
  box-shadow: var(--card-hover-shadow);
  transform: translateY(-5px);
}

.contact__info {
  margin-bottom: var(--space-xl);
  font-size: clamp(1rem, 2vw, 1.1rem);
}

.contact__container {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: clamp(var(--space-lg), 5vw, var(--space-2xl));
  margin: var(--space-xl) 0;
}

.contact__link {
  display: inline-block;
  transition: var(--transition-bounce);
  position: relative;
}

.contact__icon {
  width: clamp(45px, 10vw, 60px);
  height: clamp(45px, 10vw, 60px);
  transition: var(--transition-bounce);
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.contact__link:hover {
  transform: translateY(-8px) scale(1.1);
}

.contact__link:hover .contact__icon {
  transform: scale(1.15);
  filter: drop-shadow(0 8px 12px rgba(0, 0, 0, 0.2));
}

.contact__link::after {
  content: attr(aria-label);
  position: absolute;
  bottom: -30px;
  left: 50%;
  transform: translateX(-50%) scale(0);
  background: var(--active-color);
  color: white;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  white-space: nowrap;
  opacity: 0;
  transition: all 0.3s ease;
  pointer-events: none;
}

.contact__link:hover::after {
  opacity: 1;
  transform: translateX(-50%) scale(1);
  bottom: -40px;
}

.contact__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.contact__form input,
.contact__form textarea {
  padding: var(--space-md);
  border: 2px solid #eee;
  border-radius: var(--radius-md);
  font-family: var(--font-primary);
  font-size: 1rem;
  transition: var(--transition-base);
}

.contact__form input:focus,
.contact__form textarea:focus {
  outline: none;
  border-color: var(--active-color);
  box-shadow: 0 0 0 3px rgba(77, 72, 85, 0.1);
  transform: scale(1.02);
}

.contact__form textarea {
  min-height: 150px;
  resize: vertical;
}

.contact__form button {
  background-image: var(--primary-gradient);
  color: white;
  border: none;
  padding: var(--space-md);
  border-radius: var(--radius-md);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-bounce);
  border: 1px solid transparent;
}

.contact__form button:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: var(--shadow-md);
  border-color: white;
}

/* ===== BOTÓN SCROLL TOP ===== */
.scroll__top {
  position: fixed;
  right: clamp(var(--space-md), 4vw, var(--space-xl));
  bottom: clamp(var(--space-md), 4vw, var(--space-xl));
  width: clamp(45px, 8vw, 55px);
  height: clamp(45px, 8vw, 55px);
  background: var(--scroll-bg);
  color: var(--text-dark);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  font-size: clamp(1.3rem, 3vw, 1.6rem);
  display: flex;
  justify-content: center;
  align-items: center;
  transition: var(--transition-bounce);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  cursor: pointer;
  z-index: 1000;
}

.scroll__top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll__top:hover {
  background: var(--scroll-hover);
  transform: translateY(-5px) scale(1.1);
  box-shadow: var(--shadow-md);
}

/* ===== FOOTER ===== */

.footer {
  background-color: #4d4855;
  background-image: var(--header-gradient);
  color: white;
  text-align: center;
  padding: var(--space-lg);
  margin-top: auto;
  font-size: clamp(0.85rem, 2vw, 0.95rem);
}

.footer__text {
  margin: var(--space-xs) 0;
  transition: var(--transition-base);
}

.footer__text:hover {
  transform: scale(1.05);
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

/* ===== MEDIA QUERIES ===== */

/* Teléfonos pequeños */
@media (max-width: 320px) {
  .language-buttons {
    flex-direction: column;
    gap: var(--space-xs);
    top: var(--space-xs);
    right: var(--space-xs);
  }

  .language-buttons button {
    width: 100%;
  }

  .header__nav ul {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .project-links {
    flex-direction: column;
  }

  .project-links a {
    width: 100%;
  }
}

/* Teléfonos */
@media (max-width: 480px) {
  .header {
    padding-top: 50px;
  }

  .language-buttons {
    top: var(--space-xs);
    right: var(--space-xs);
  }

  .profile-photo {
    margin-top: var(--space-lg);
  }

  .section {
    padding: var(--space-xl) var(--space-sm);
  }

  .about__content,
  .contact__content {
    padding: var(--space-lg);
  }
}

/* Tablets */
@media (max-width: 768px) {
  .header__nav ul li {
    display: block;
    margin: var(--space-xs) 0;
  }

  .profile-photo {
    width: 120px;
    height: 120px;
  }
}

/* ===== ABOUT PAGE MEJORADA ===== */
.about {
  padding: var(--space-2xl) var(--space-md);
}

.about__content {
  max-width: 900px;
  margin: 0 auto;
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-lg);
  transition: var(--transition-base);
  text-align: left;
}

.about__content:hover {
  box-shadow: var(--card-hover-shadow);
  transform: translateY(-5px);
}

.about__intro {
  margin-bottom: var(--space-2xl);
}

.about__text {
  font-size: clamp(1rem, 2vw, 1.1rem);
  line-height: 1.8;
  color: var(--text-dark);
  white-space: pre-line; /* Дозволяє переносити рядки */
}

.about__subtitle {
  color: var(--active-color);
  margin: var(--space-xl) 0 var(--space-lg);
  font-size: clamp(1.2rem, 3vw, 1.4rem);
  border-left: 4px solid var(--active-color);
  padding-left: var(--space-md);
  font-weight: 600;
}

.about__skills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.about__skill {
  background: var(--primary-gradient);
  color: white;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition-bounce);
  box-shadow: var(--shadow-sm);
}

.about__skill:hover {
  transform: scale(1.1) translateY(-2px);
  box-shadow: var(--shadow-md);
}

.about__languages {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-md);
  background: #f8f8f8;
  padding: var(--space-lg);
  border-radius: var(--radius-md);
}

.about__language {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-xs) 0;
  border-bottom: 1px solid #e0e0e0;
}

.about__language:last-child {
  border-bottom: none;
}

.about__language-name {
  font-weight: 600;
  color: var(--active-color);
  font-size: 1.1rem;
}

.about__language-level {
  background: var(--primary-gradient);
  color: white;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9rem;
  min-width: 70px;
  text-align: center;
}

/* Для мобільних пристроїв */
@media (max-width: 768px) {
  .about__content {
    padding: var(--space-lg);
  }

  .about__skills {
    gap: var(--space-xs);
  }

  .about__skill {
    font-size: 0.8rem;
    padding: 0.2rem 0.8rem;
  }

  .about__language {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs);
  }

  .about__language-level {
    align-self: flex-start;
  }
}

@media (max-width: 480px) {
  .about__content {
    padding: var(--space-md);
  }
}