/* --- Variables & Reset --- */
:root {
  --primary-color: #2b6cb0;
  --secondary-color: #2c5282;
  --accent-color: #f6ad55;
  --text-dark: #333;
  --text-light: #666;
  --white: #fff;
  --bg-light: #f7fafc;
  --success: #25d366;

  /* WhatsApp Green */
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Open Sans', sans-serif;
  --nav-height: 70px;
}

body.dark-mode {
  --text-dark: #f7fafc;
  --text-light: #cbd5e0;
  --white: #1a202c;

  /* Main dark bg */
  --bg-light: #2d3748;

  /* Lighter dark for cards/sections */
  --primary-color: #63b3ed;

  /* Lighter blue for dark mode visibility */
  --secondary-color: #4299e1;
  --text-heading: #fff;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--white);
  padding-top: var(--nav-height);

  /* Offset for fixed header */
  transition:
    background-color 0.3s ease,
    color 0.3s ease;
}

a {
  text-decoration: none;
  color: inherit;
  transition: 0.3s;
}

ul {
  list-style: none;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* --- Navigation --- */
.navbar {
  background-color: var(--white);
  height: var(--nav-height);
  display: flex;
  justify-content: center;
  align-items: center;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-link {
  font-weight: 600;
  color: var(--text-dark);
  font-size: 1rem;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color);
}

/* Hamburger Menu */
.menu-toggle {
  display: none;
  cursor: pointer;
}

.bar {
  display: block;
  width: 25px;
  height: 3px;
  margin: 5px auto;
  transition: all 0.3s ease-in-out;
  background-color: var(--text-dark);
}

/* --- Hero Section --- */
.hero {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--white);
  height: 80vh;

  /* Take up most of the viewport */
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 0 20px;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: 3rem;
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 30px;
  opacity: 0.9;
}

.btn {
  display: inline-block;
  padding: 12px 30px;
  border-radius: 50px;
  font-weight: 600;
  cursor: pointer;
  border: none;
}

/* Theme Toggle Button */
.theme-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.2rem;
  color: var(--text-dark);
  padding: 5px;
  transition:
    transform 0.3s ease,
    color 0.3s ease;
  display: flex;
  align-items: center;
}

.theme-btn:hover {
  color: var(--accent-color);
  transform: rotate(15deg);
}

.btn-primary {
  background-color: var(--accent-color);
  color: var(--text-dark);
}

.btn-primary:hover {
  background-color: #dd9643;
  transform: translateY(-2px);
}

/* --- General Section Styles --- */
.section {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 50px;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background-color: var(--accent-color);
  margin: 10px auto 0;
  border-radius: 2px;
}

.bg-light {
  background-color: var(--bg-light);
}

/* --- Dark Mode Overrides --- */
body.dark-mode .navbar {
  background-color: var(--white);
  border-bottom: 1px solid #2d3748;
}

body.dark-mode .card,
body.dark-mode .testimonial-card,
body.dark-mode .feedback-form-wrapper {
  /* Cards should be 'elevated' (lighter in dark mode usually).
     Make cards lighter than main bg */
  background-color: #4a5568;
}

body.dark-mode .bg-light {
  /* Make "light" sections darker than main bg for contrast, or keep as var?
                                  Let's use a specific dark tone */
  background-color: #2d3748;

  /* Lighter than everything */
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

body.dark-mode .feedback-form-wrapper {
  border-color: #4a5568;
}

/* Input Fields in Dark Mode */
body.dark-mode input,
body.dark-mode textarea {
  background-color: #2d3748;
  color: #f7fafc;
  border-color: #4a5568;
}

body.dark-mode input:focus,
body.dark-mode textarea:focus {
  border-color: var(--accent-color);
}

/* --- Cards (Subjects & Projects) --- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.card {
  background: var(--white);
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease;
  text-align: center;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.card-icon {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.card h3 {
  margin-bottom: 15px;
  font-family: var(--font-heading);
}

.card p {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* --- Skills Tags --- */
.skills-wrapper {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
}

.skill-tag {
  background: var(--bg-light);
  color: var(--secondary-color);
  padding: 10px 20px;
  border-radius: 20px;
  font-weight: 600;
  font-size: 0.9rem;
  border: 1px solid #e2e8f0;
}

/* --- Testimonials Section --- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-bottom: 60px;
}

.testimonial-card {
  background: var(--bg-light);
  padding: 30px;
  border-radius: 10px;
  position: relative;
  border-left: 5px solid var(--primary-color);
}

.quote-icon {
  font-size: 1.5rem;
  color: var(--primary-color);
  opacity: 0.3;
  margin-bottom: 15px;
}

.testimonial-text {
  font-style: italic;
  color: var(--text-dark);
  margin-bottom: 20px;
}

.testimonial-author h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--primary-color);
  margin-bottom: 2px;
}

.testimonial-author span {
  font-size: 0.85rem;
  color: var(--text-light);
}

/* --- Feedback Form --- */
.feedback-form-wrapper {
  max-width: 600px;
  margin: 0 auto;
  background: var(--white);
  padding: 40px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  text-align: center;
  border: 1px solid #eee;
}

.feedback-form-wrapper h3 {
  font-family: var(--font-heading);
  color: var(--secondary-color);
  margin-bottom: 10px;
}

.feedback-form-wrapper p {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 30px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid #ccc;
  border-radius: 5px;
  font-family: var(--font-body);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary-color);
}

.form-group textarea {
  resize: vertical;
}

/* --- Star Rating (New) --- */
.rating-group {
  text-align: left;
  margin-bottom: 20px;
}

.rating-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--text-dark);
}

.star-rating {
  display: flex;
  gap: 10px;
  font-size: 1.5rem;
  cursor: pointer;
}

.star-rating i {
  color: #e2e8f0;

  /* Default empty color */
  transition: color 0.2s ease;
}

.star-rating i.active,
.star-rating i.hover {
  color: #f6ad55;

  /* Match accent color but verify variable usage */
  color: var(--accent-color);
}

.testimonial-rating {
  margin-bottom: 10px;
  color: var(--accent-color);
  font-size: 1rem;
}

/* --- Contact --- */
.contact-info {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 30px;
  flex-wrap: wrap;
}

.info-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
}

.info-item i {
  color: var(--primary-color);
}

.contact-subtitle {
  text-align: center;
  color: var(--text-light);
}

/* --- Footer --- */
footer {
  background-color: var(--text-dark);
  color: var(--white);
  text-align: center;
  padding: 20px 0;
  margin-top: auto;
}

/* --- WhatsApp Button --- */
.whatsapp-btn {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background-color: var(--success);
  color: var(--white);
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 35px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  z-index: 2000;
  transition: transform 0.3s ease;
}

.whatsapp-btn:hover {
  transform: scale(1.1);
}

/* --- Mobile Responsive --- */
@media (width <= 768px) {
  .menu-toggle {
    display: block;
    z-index: 1001;
  }

  .menu-toggle.active .bar:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .menu-toggle.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .nav-menu {
    position: fixed;
    left: -100%;
    top: 0;

    /* Cover entire screen including behind notification area if possible, but 0 is good */
    gap: 0;
    flex-direction: column;
    background-color: var(--white);
    width: 100%;
    height: 100vh;

    /* Full viewport height */
    text-align: center;
    transition: 0.3s;
    padding-top: 80px;

    /* Space for the X button */
    justify-content: flex-start;
  }

  .nav-menu.active {
    left: 0;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  }

  .nav-menu li {
    margin: 20px 0;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .section {
    padding: 50px 0;
  }
}