:root {
  --color-bg: #0a0a0f;
  --color-text: #e6e6e6;
  --color-accent: #1d201e;
  --color-highlight: #ffffff;
  --color-hover: #05446d;
  --color-border: rgba(255, 255, 255, 0.12);
  --color-btn-bg: #f9f9f9;
  --color-btn-hover: #05446d;
  --color-footer: #000018;
  --color-skill-bg: #11141a;
  --color-skill-hover: #1a1d24;
  --radius: 12px;
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: 'Poppins', sans-serif;
  overflow-x: hidden;
  line-height: 1.6;
}

/* ----- NAVBAR ----- */
nav {
  position: sticky;
  top: 0;
  z-index: 999;
  width: 100%;
  padding: 15px 20px;
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav .left {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-highlight);
  font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
}

nav ul {
  display: flex;
  gap: 10px;
  list-style: none;
}

nav ul li {
  padding: 8px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.9rem;
}

nav ul li:hover {
  background: var(--color-hover);
  color: #fff;
}

nav ul li a {
  text-decoration: none;
  color: inherit;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-highlight);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 5px;
}

/* ----- SECTIONS ----- */
.section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 20px;
}

/* ----- HERO ----- */
.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  flex-direction: column-reverse;
  text-align: center;
}

.hero-text {
  flex: 1;
  max-width: 600px;
}

.hero-text h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 20px;
  animation: fadeInUp 1s ease-out;
  color: var(--color-highlight);
  line-height: 1.2;
}

.hero-text p {
  font-size: 1rem;
  opacity: 0.85;
  margin-bottom: 25px;
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius);
  background: var(--color-btn-bg);
  color: #00101f;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  margin-top: 10px;
}

.btn:hover {
  background: var(--color-btn-hover);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(31, 164, 255, 0.3);
}

.hero-image {
  flex: 1;
  text-align: center;
  max-width: 400px;
}

.hero-image img {
  width: 100%;
  max-width: 280px;
  height: 280px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--color-accent);
  box-shadow: 0 12px 40px rgba(0, 153, 255, 0.45);
  transition: var(--transition);
}

.hero-image img:hover {
  transform: scale(1.05);
}

/* ----- TITLES ----- */
.section-title {
  font-size: 2rem;
  margin-bottom: 30px;
  padding-left: 14px;
  border-left: 6px solid var(--color-accent);
  color: var(--color-highlight);
  line-height: 1.3;
}

/* ----- SKILLS ----- */
.skills ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  justify-content: center;
}

.skills li {
  padding: 12px 20px;
  background: var(--color-skill-bg);
  border-radius: var(--radius);
  transition: var(--transition);
  font-size: 0.9rem;
  text-align: center;
  min-width: 120px;
}

.skills li:hover {
  background: var(--color-skill-hover);
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

/* ----- CONTACT FORM ----- */
.contact-form {
  background: rgba(255, 255, 255, 0.06);
  padding: 25px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  backdrop-filter: blur(10px);
  max-width: 600px;
  margin: 0 auto;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  margin-bottom: 15px;
  padding: 12px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  transition: var(--transition);
  font-family: inherit;
  font-size: 0.9rem;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 12px rgba(77, 184, 255, 0.4);
  outline: none;
}

.contact-form textarea {
  min-height: 120px;
  resize: vertical;
}

/* ----- SLIDER ----- */
.slider {
  margin: 30px auto;
  width: 95%;
  max-width: 750px;
  height: 300px;
  overflow: hidden;
  border-radius: var(--radius);
  position: relative;
  background: #111;
  box-shadow: 0px 8px 20px rgba(0,0,0,0.25);
}

.slider img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: none;
  transition: var(--transition);
}

.slider img.active {
  display: block;
}

.arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  padding: 10px 14px;
  border-radius: 50%;
  background: rgba(0, 88, 158, 0.7);
  cursor: pointer;
  z-index: 10;
  user-select: none;
  transition: var(--transition);
  color: #fff;
  font-size: 1.2rem;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
}

.arrow:hover {
  background: rgba(0, 142, 222, 0.9);
  transform: translateY(-50%) scale(1.1);
}

.arrow.prev {
  left: 10px;
}

.arrow.next {
  right: 10px;
}

/* ----- FOOTER ----- */
footer {
  text-align: center;
  padding: 25px 20px;
  border-top: 1px solid var(--color-border);
  background: var(--color-footer);
  color: #9ecbff;
  font-size: 0.9rem;
  margin-top: 40px;
}

/* ----- ANIMATIONS ----- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(50px);
  transition: 0.7s ease-in-out;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* ----- RESPONSIVE BREAKPOINTS ----- */

/* Tablet */
@media (min-width: 768px) {
  nav {
    padding: 18px 30px;
  }
  
  nav .left {
    font-size: 1.8rem;
  }
  
  nav ul {
    gap: 15px;
  }
  
  nav ul li {
    padding: 10px 16px;
    font-size: 1rem;
  }
  
  .section {
    padding: 90px 30px;
  }
  
  .hero {
    flex-direction: row;
    text-align: left;
    gap: 50px;
  }
  
  .hero-text h1 {
    font-size: 3rem;
  }
  
  .hero-text p {
    font-size: 1.1rem;
  }
  
  .hero-image img {
    max-width: 330px;
    height: 330px;
  }
  
  .btn {
    padding: 14px 32px;
    font-size: 1rem;
  }
  
  .section-title {
    font-size: 2.2rem;
  }
  
  .skills ul {
    justify-content: flex-start;
    gap: 12px;
  }
  
  .skills li {
    padding: 14px 24px;
    font-size: 1rem;
    min-width: 140px;
  }
  
  .contact-form {
    padding: 30px;
  }
  
  .slider {
    height: 360px;
    width: 90%;
  }
  
  .arrow {
    padding: 12px 18px;
    font-size: 1.5rem;
    width: 50px;
    height: 50px;
  }
}

/* Desktop */
@media (min-width: 1024px) {
  nav {
    padding: 18px 40px;
  }
  
  nav .left {
    font-size: 2rem;
  }
  
  nav ul {
    gap: 20px;
  }
  
  nav ul li {
    padding: 10px 18px;
  }
  
  .section {
    padding: 100px 30px;
  }
  
  .hero-text h1 {
    font-size: 3.5rem;
  }
  
  .hero-text p {
    font-size: 1.15rem;
  }
  
  .hero-image img {
    max-width: 350px;
    height: 350px;
  }
  
  .section-title {
    font-size: 2.4rem;
  }
  
  .slider {
    margin: 40px auto;
  }
}

/* Small Mobile */
@media (max-width: 480px) {
  nav {
    padding: 12px 15px;
  }
  
  nav .left {
    font-size: 1.3rem;
  }
  
  .hero-text h1 {
    font-size: 2rem;
  }
  
  .hero-image img {
    max-width: 220px;
    height: 220px;
  }
  
  .section-title {
    font-size: 1.7rem;
  }
  
  .skills li {
    padding: 10px 16px;
    font-size: 0.85rem;
    min-width: 100px;
  }
  
  .contact-form {
    padding: 20px;
  }
  
  .slider {
    height: 250px;
  }
  
  .arrow {
    padding: 8px 12px;
    font-size: 1rem;
    width: 35px;
    height: 35px;
  }
  
  footer {
    padding: 20px 15px;
    font-size: 0.85rem;
  }
}

/* Mobile Menu for very small screens */
@media (max-width: 600px) {
  .menu-toggle {
    display: block;
  }
  
  nav ul {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(15px);
    flex-direction: column;
    padding: 15px 0;
    border-bottom: 1px solid var(--color-border);
  }
  
  nav ul.show {
    display: flex;
  }
  
  nav ul li {
    text-align: center;
    padding: 12px;
    margin: 0 15px;
    border-radius: var(--radius);
  }
}

/* Prevent horizontal scroll */
@media (max-width: 400px) {
  .skills li {
    min-width: calc(50% - 10px);
  }
  
  .hero-text h1 {
    font-size: 1.8rem;
  }
  
  .section {
    padding: 60px 15px;
  }
}