:root {
  /* Light theme colors */
  --text-color: #1a1c20;
  --link-color: #4a76ee;
  --background-color: #eeeff1;
  --shadow-color: rgba(0, 0, 0, 0.2);
  --button-hover-color: #3a5bcc;

  /* Dark theme colors */
  --dark-text-color: #eee;
  --dark-link-color: #5aa0ff;
  --dark-background-color: #121212;
  --dark-shadow-color: rgba(255, 255, 255, 0.2);
  --dark-button-hover-color: #3a5bcc;
}

/* Global resets */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "Poppins", sans-serif;
  color: var(--text-color);
  background: var(--background-color);
  max-width: 1400px;
  margin: 0 auto;
  transition: all 0.3s ease;
}
a {
  color: var(--link-color);
  text-decoration: none;
  transition: color 0.3s;
}

/* Dark theme variables */
body.dark-theme {
  --text-color: var(--dark-text-color);
  --link-color: var(--dark-link-color);
  --background-color: var(--dark-background-color);
  --shadow-color: var(--dark-shadow-color);
  --button-hover-color: var(--dark-button-hover-color);
}

/* NAVBAR*/
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 50px;
  height: 80px;
  position: relative;
}

nav .left a {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-color);
}

nav .right a {
  margin: 0 10px;
  color: var(--text-color);
}

nav .right a span {
  margin-left: 5px;
}

nav .right a#theme-toggle i {
  cursor: pointer;
}

/* הכפתור Hamburger – מוסתר במחשב */
.menu-toggle {
  display: none;
  font-size: 24px;
  cursor: pointer;
}

@media (max-width: 700px) {
  .menu-toggle {
    display: block;
    z-index: 1000;
  }

  nav .right {
    position: absolute;
    top: 80px;
    right: 0;
    background-color: var(--background-color);
    flex-direction: column;
    width: 200px;
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    display: none;
    z-index: 999;
  }

  nav .right.show {
    display: flex;
  }

  nav .right a {
    margin: 8px 0;
  }
}

/* HERO SECTION */
.hero-section {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  justify-content: space-between;
  align-items: center;
  padding: 50px;
}
.hero-section .text {
  flex: 1 1 300px;
  position: relative;
  z-index: 2;
}
.hero-section .text h2 {
  font-size: 45px;
  margin-bottom: 15px;
}
.hero-section .text p {
  font-size: 18px;
  line-height: 1.6;
  margin-bottom: 25px;
}
.hero-section .links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  position: relative;
  z-index: 3;
}
.hero-section .links a {
  display: inline-block;
  padding: 8px 15px;
  border: 2px solid var(--link-color);
  border-radius: 6px;
  font-weight: 500;
  transition: all 0.2s;
}
.hero-section .links a:hover {
  background-color: var(--link-color);
  color: #fff;
}
.hero-section .headshot {
  width: 200px;
  max-width: 100%;
  aspect-ratio: 1/1;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid #ccc;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}
.hero-section .headshot img {
  width: 100% !important;
  height: 100% !important;
  object-fit: cover;
}

/* SKILLS */
.skills-section {
  padding: 0 50px;
  margin-bottom: 100px;
}
.skills-section h2 {
  text-align: center;
  font-size: 35px;
  margin-bottom: 40px;
}
.skills-section .cells {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
}
.skills-section .cells .cell {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  width: 200px;
  padding: 10px 20px;
  border-radius: 10px;
  background: linear-gradient(135deg, #ffffff, #f0f4ff);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
}
.skills-section .cells .cell:hover {
  transform: translateY(-5px) scale(1.03);
  box-shadow: 0 12px 25px var(--shadow-color);
}
.skills-section .cells .cell img {
  width: 30px;
  height: 30px;
  object-fit: contain;
}
.skills-section .cells .cell span {
  font-size: 18px;
  font-weight: 500;
}

/* PROJECTS */
.projects-section {
  padding: 0 50px;
  margin-bottom: 100px;
}
.projects-section h2 {
  font-size: 35px;
  margin-bottom: 30px;
  text-align: center;
}
.project {
  margin-bottom: 25px;
  padding: 20px;
  border-radius: 12px;
  background: linear-gradient(135deg, #ffffff, #f7f9ff);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
}
.project:hover {
  transform: translateY(-5px) scale(1.02);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}
.project h3 a {
  color: var(--link-color);
  transition: color 0.3s;
}
.project h3 a:hover {
  color: var(--button-hover-color);
}

/* ABOUT SECTION */
.about-section {
  padding: 50px;
  margin-bottom: 100px;
  background: linear-gradient(
    135deg,
    rgba(74, 118, 238, 0.05),
    rgba(255, 255, 255, 0.05)
  );
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
}
.about-section h2 {
  font-size: 35px;
  text-align: center;
  margin-bottom: 30px;
  color: var(--text-color);
}
.about-section p {
  font-size: 18px;
  line-height: 1.7;
  margin-bottom: 20px;
  color: var(--text-color);
  text-align: justify;
}
.about-section p:last-child {
  margin-bottom: 0;
}
.about-section:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
}

/* CONTACT SECTION */
.contact-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding: 50px 20px;
  margin-bottom: 50px;
  min-height: 50vh;
}
.contact-section h2 {
  font-size: 35px;
  margin-bottom: 20px;
}
.contact-section .group {
  width: 100%;
  max-width: 500px;
}
.contact-section form {
  display: flex;
  flex-direction: column;
  gap: 15px;
  width: 100%;
}
.contact-section input,
.contact-section textarea {
  padding: 12px;
  border: 2px solid var(--link-color);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-color);
  outline: none;
  border-radius: 5px;
  transition: all 0.3s ease;
}
.contact-section input:focus,
.contact-section textarea:focus {
  border-color: var(--link-color);
  box-shadow: 0 4px 10px var(--shadow-color);
  background: rgba(255, 255, 255, 0.1);
}
.contact-section button {
  padding: 15px;
  border: none;
  background: var(--link-color);
  color: #fff;
  cursor: pointer;
  border-radius: 5px;
  font-size: 16px;
  transition: 0.3s;
}
.contact-section button:hover {
  background: var(--button-hover-color);
  transform: scale(1.05);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

/* PARAGRAPHS & LINKS */
p {
  font-size: 18px;
  line-height: 1.75;
  margin-bottom: 20px;
  color: var(--text-color);
  letter-spacing: 0.4px;
  font-weight: 400;
  transition: color 0.3s, transform 0.3s, text-shadow 0.3s;
}
p:hover {
  transform: translateY(-2px);
  color: var(--link-color);
}
p a {
  color: var(--link-color);
  text-decoration: underline;
  transition: color 0.3s;
}
p a:hover {
  color: var(--button-hover-color);
  text-decoration: none;
}

/* CONTACT INTRO TEXT */
.contact-section > p:first-of-type {
  font-size: 18px;
  line-height: 1.7;
  font-weight: 400;
  margin: 0 auto 30px auto;
  max-width: 700px;
  padding: 15px 20px;
  background-color: rgba(74, 118, 238, 0.03);
  border-radius: 8px;
  color: var(--text-color);
  text-align: justify;
  letter-spacing: 0.3px;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
}
.contact-section > p:first-of-type:hover {
  transform: translateY(-2px);
  text-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}
.contact-section > p:first-of-type a {
  color: var(--link-color);
  text-decoration: underline;
  transition: color 0.3s, text-shadow 0.3s;
}
.contact-section > p:first-of-type a:hover {
  color: var(--button-hover-color);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* FOOTER */
.footer-section {
  text-align: center;
  padding: 20px 0;
  background-color: var(--background-color);
  color: var(--text-color);
  border-top: 1px solid var(--shadow-color);
  font-size: 14px;
  transition: all 0.3s ease;
}

/* DARK MODE CARDS AND FOOTER */
body.dark-theme .skills-section .cells .cell {
  background: linear-gradient(135deg, #1e1e1e, #252525);
  box-shadow: 0 5px 15px rgba(255, 255, 255, 0.05);
}
body.dark-theme .skills-section .cells .cell:hover {
  box-shadow: 0 12px 25px rgba(255, 255, 255, 0.1);
}
body.dark-theme .project {
  background: linear-gradient(135deg, #1a1a1a, #222222);
  box-shadow: 0 8px 20px rgba(255, 255, 255, 0.05);
}
body.dark-theme .project:hover {
  box-shadow: 0 15px 35px rgba(255, 255, 255, 0.1);
}
body.dark-theme .about-section {
  background: linear-gradient(
    135deg,
    rgba(90, 160, 255, 0.05),
    rgba(255, 255, 255, 0.03)
  );
  box-shadow: 0 8px 20px rgba(255, 255, 255, 0.05);
}
body.dark-theme .about-section:hover {
  box-shadow: 0 12px 30px rgba(255, 255, 255, 0.1);
}
body.dark-theme .contact-section > p:first-of-type {
  background-color: rgba(90, 160, 255, 0.05);
}
body.dark-theme .footer-section {
  background-color: var(--dark-background-color);
  color: var(--dark-text-color);
  border-top: 1px solid var(--dark-shadow-color);
}

/* MEDIA QUERIES */
@media (max-width: 850px) {
  .hero-section .text h2 {
    font-size: 35px;
  }
}
@media (max-width: 740px) {
  .hero-section {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 25px;
  }
  .hero-section .headshot {
    width: 180px;
  }
  .hero-section .links {
    justify-content: center;
  }
}
@media (max-width: 600px) {
  nav {
    padding: 0 20px;
  }
  .hero-section {
    padding: 0 20px;
  }
  .skills-section {
    padding: 0 20px;
  }
  .contact-section {
    padding: 0 20px;
  }
}
@media (max-width: 768px) {
  p {
    font-size: 16px;
    line-height: 1.6;
    letter-spacing: 0.3px;
  }
  .contact-section > p:first-of-type {
    font-size: 16px;
    line-height: 1.6;
    text-align: center;
    max-width: 90%;
    padding: 10px 15px;
  }
}

/* Fade-in + slide-up animation */
.fade-init {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}
.appear {
  opacity: 1;
  transform: translateY(0);
}

/* BACK TO TOP BUTTON */
#back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background-color: var(--link-color);
  color: #fff;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  font-size: 22px;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}
#back-to-top.show {
  opacity: 1;
  visibility: visible;
}
#back-to-top:hover {
  background-color: var(--button-hover-color);
  transform: scale(1.1);
}

/* BACK TO TOP BUTTON DARK MODE */
body.dark-theme #back-to-top {
  background-color: var(--dark-link-color);
  color: var(--dark-text-color);
}
body.dark-theme #back-to-top:hover {
  background-color: var(--dark-button-hover-color);
}

/* SMOOTH HOVER TRANSITIONS FOR DYNAMIC ELEMENTS */
.hero-section .links a,
.contact-section button,
.skills-section .cells .cell,
.project,
p,
p a {
  transition: transform 0.3s ease, box-shadow 0.3s ease, color 0.3s ease,
    text-shadow 0.3s ease;
}

/* SPINNER ל-Contact Form */
.contact-section button .spinner {
  display: inline-block;
  margin-left: 10px;
  font-size: 16px;
  vertical-align: middle;
  color: #fff;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.contact-section button .spinner i {
  display: inline-block;
  animation: spin 1s linear infinite;
}