/* Reset & base */
*, *::before, *::after {
  box-sizing: border-box;
}
body {
  margin: 0;
  padding: 0;
  font-family: 'Poppins', sans-serif;
  background: linear-gradient(135deg, #d4fc79 0%, #96e6a1 100%);
  color: #222;
  scroll-behavior: smooth;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a {
  text-decoration: none;
  color: inherit;
}
ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

/* Container */
.container {
  width: 90%;
  max-width: 1100px;
  margin: 0 auto;
}

/* Navbar */
header {
  position: sticky;
  top: 0;
  background: rgba(255 255 255 / 0.95);
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  z-index: 999;
  backdrop-filter: saturate(180%) blur(10px);
}
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
}
.logo {
  background-image: url('oglogo.png');
  background-size: contain;
  background-repeat: no-repeat;
  width: 120px;
  height: 60px;
  cursor: pointer;
  filter: drop-shadow(2px 2px 3px rgba(0,0,0,0.15));
  transition: transform 0.3s ease;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(23,162,184,0.3);
}
.logo:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 20px rgba(23,162,184,0.6);
}
nav ul {
  display: flex;
  gap: 2rem;
  font-weight: 600;
  font-size: 1.1rem;
}
nav ul li a {
  color: #222;
  position: relative;
  padding-bottom: 4px;
  transition: color 0.3s ease;
  border-radius: 4px;
}
nav ul li a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 3px;
  width: 0;
  background: #17a2b8;
  transition: width 0.3s ease;
  border-radius: 2px;
}
nav ul li a:hover, nav ul li a.active {
  color: #10575f;
  font-weight: 700;
  background: #d2f1ee;
}
nav ul li a:hover::after,
nav ul li a.active::after {
  width: 100%;
}

/* Header Section */
.header {
  height: 100vh;
  background: url('bg3.jpg') center/cover no-repeat fixed;
  display: flex;
  align-items: center;
  color: white;
  text-shadow: 1px 1px 12px rgba(0,0,0,0.8);
  padding-left: 10%;
  border-radius: 0 0 60px 60px / 50px;
  box-shadow: inset 0 0 60px rgba(0,0,0,0.4);
}
.header-text p {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: 3px;
  margin-bottom: 1rem;
  text-transform: uppercase;
  color: #a8e7ffcc;
}
.header-text h1 {
  font-size: 4rem;
  font-weight: 900;
  line-height: 1.1;
  max-width: 720px;
  margin-bottom: 0.3rem;
}
.header-text h1 span {
  color: #17a2b8;
  text-shadow: 0 0 30px #17a2b8aa;
}
@media (max-width: 768px) {
  .header {
    height: 60vh;
    padding-left: 5%;
  }
  .header-text h1 {
    font-size: 2.6rem;
  }
  .header-text p {
    font-size: 1.1rem;
  }
}

/* Section Titles */
h1.sub-title {
  font-size: 2.8rem;
  font-weight: 900;
  text-align: center;
  color: #10575f;
  margin-bottom: 2rem;
  letter-spacing: 2px;
  text-shadow: 0 0 6px #0e7b73aa;
  text-transform: uppercase;
}

/* About Section */
#about {
  padding: 80px 0 60px;
  background: #e6f2f1;
  border-radius: 40px;
  box-shadow: 0 10px 18px rgba(15,45,55,0.15);
  color: #20403c;
  margin-top: 4rem;
}
#about .row {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
}
.about-col-1 {
  flex: 1 1 320px;
  max-width: 420px;
  overflow: hidden;
  border-radius: 30px;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  cursor: default;
}
.about-col-1 img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 30px;
  filter: drop-shadow(1px 4px 7px rgba(23,162,184,0.3));
  user-select:none;
}
.about-col-1:hover {
  transform: scale(1.05);
  box-shadow: 0 20px 60px rgba(23,162,184,0.4);
}
.about-col-2 {
  flex: 1 1 480px;
}
.about-col-2 p {
  font-size: 1.15rem;
  margin: 1rem 0 0 0;
  border-left: 5px solid #60dada;
  padding-left: 20px;
  color: #125c58;
  line-height: 1.5;
  font-weight: 500;
  text-shadow: 0 0 3px #98d5d1cc;
}

/* Tabs */
.tab-titles {
  display: flex;
  gap: 18px;
  margin-top: 48px;
  border-bottom: 3px solid #aacfd2;
  user-select: none;
  flex-wrap: wrap;
}
.tab-links {
  flex-grow: 1;
  padding: 14px 22px;
  font-weight: 700;
  font-size: 1.1rem;
  color: #17a2b8;
  cursor: pointer;
  border-bottom: 5px solid transparent;
  border-radius: 10px 10px 0 0;
  transition: all 0.4s ease;
  text-align: center;
  background-color: #c5f5f8cc;
  box-shadow: 0 3px 8px rgba(23,162,184,0.3);
}
.tab-links.active-link {
  border-color: #10635c;
  background-color: #17a2b8;
  color: #e1f7f7;
  box-shadow: 0 5px 20px rgba(23,162,184,0.6);
}
.tab-contents {
  display: none;
  padding: 22px 20px 0 20px;
  font-size: 1rem;
  color: #154040;
  line-height: 1.6;
}
.tab-contents.active-tab {
  display: block;
}
.tab-contents ul li {
  margin-bottom: 16px;
}
.tab-contents ul li span {
  font-weight: 700;
  color: #104d47;
  font-size: 1.05rem;
  text-shadow: 0 0 3px #7dd0cccc;
}

/* Portfolio Section */
#portfolio {
  padding: 80px 0 60px;
  background: #e3faf8;
  border-radius: 40px;
  box-shadow: 0 10px 40px rgba(23,162,184,0.25);
  margin-top: 4rem;
}
.work-list {
  display: grid;
  grid-template-columns: repeat(auto-fit,minmax(300px,1fr));
  gap: 28px;
  margin-top: 30px;
  padding: 0 1rem;
}
.work {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 16px 40px rgba(0,0,0,0.07);
  cursor: pointer;
  background: white;
  transition: transform 0.45s ease, box-shadow 0.4s ease;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  border: 4px solid transparent;
}
.work:focus-within,
.work:hover {
  transform: translateY(-10px);
  box-shadow: 0 24px 50px rgba(23,162,184,0.4);
  border-color: #0c786c;
  outline: none;
}
.work img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
  border-radius: 20px 20px 0 0;
  user-select:none;
}
.work:hover img,
.work:focus-within img {
  transform: scale(1.06);
}
.layer {
  padding: 16px 2rem 3rem;
  color: #104f4a;
  font-weight: 600;
  font-size: 1.2rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-radius: 0 0 20px 20px;
  background: linear-gradient(180deg, #e3faf8 0%, #8ccfc4 100%);
  text-align: center;
  box-shadow: inset 0 -10px 20px #4cd5c4aa;
}
.layer p {
  margin: 0.55rem 0 0;
  font-weight: 400;
  font-size: 0.95rem;
  color: #0b4944cc;
  text-shadow: 0 0 3px #a8dfddcc;
}
.layer > div.btn-group {
  margin-top: 15px;
  display: flex;
  justify-content: center;
  gap: 12px;
}
.btn {
  padding: 12px 24px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: 35px;
  border: none;
  cursor: pointer;
  color: white;
  background: linear-gradient(45deg, #109a8c, #3fecdd);
  box-shadow: 0 8px 20px rgb(16 154 140 / 0.7);
  transition: background 0.3s ease, box-shadow 0.25s ease;
  user-select:none;
}
.btn:hover,
.btn:focus {
  background: linear-gradient(135deg, #0c6e62, #37d9c9);
  box-shadow: 0 12px 30px rgb(16 154 140 / 0.95);
  outline:none;
}
.btn:active {
  transform: translateY(2px);
  box-shadow: 0 4px 10px rgb(16 154 140 / 0.8);
}

/* Contact Section */
#contact {
  background: #ceecea;
  padding: 80px 0 60px;
  color: #164a44;
  border-radius: 40px;
  box-shadow: 0 12px 44px rgba(22, 80, 73, 0.3);
  margin-top: 4rem;
  margin-bottom: 3rem;
}
#contact .row {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
  justify-content: center;
}
.contact-left, .contact-right {
  flex: 1 1 360px;
  max-width: 480px;
}
.contact-left h1 {
  font-weight: 900;
  margin-bottom: 36px;
  font-size: 2.8rem;
  color: #0b3b35;
  letter-spacing: 2px;
  text-shadow: 0 0 8px #42c7b9a0;
  user-select:none;
}
.contact-left p {
  margin-bottom: 18px;
  font-size: 1.25rem;
  color: #155046;
  display: flex;
  align-items: center;
  gap: 20px;
  font-weight: 600;
  text-shadow: 0 0 3px #89d9ccbb;
}
.contact-left p i {
  color: #139d8f;
  font-size: 2rem;
  min-width: 30px;
  text-align: center;
}
.social-icons {
  margin-top: 28px;
}
.social-icons a {
  font-size: 2rem;
  color: #155046cc;
  margin-right: 28px;
  transition: color 0.4s ease, transform 0.35s ease;
  display: inline-block;
}
.social-icons a:hover,
.social-icons a:focus {
  color: #108878;
  transform: translateY(-6px);
  outline:none;
}
form {
  margin-top: 12px;
  user-select:none;
}
form input, form textarea {
  width: 100%;
  background: #dcf5f3;
  border: 2px solid #68cfc4;
  border-radius: 12px;
  padding: 18px 22px;
  font-size: 1.15rem;
  margin-bottom: 22px;
  transition: border-color 0.35s ease, background-color 0.35s ease;
  resize: vertical;
  font-weight: 600;
  color: #064f45;
  box-shadow: inset 0 0 8px #84ddd6cc;
}
form input:focus, form textarea:focus {
  border-color: #17a2b8;
  background: #e1f9fb;
  outline: none;
  box-shadow: 0 0 10px #17a2b8bb;
}
.btn2 {
  background: linear-gradient(45deg, #11a199, #57f1cc);
  border: none;
  padding: 16px 56px;
  color: white;
  font-size: 1.3rem;
  font-weight: 900;
  border-radius: 50px;
  cursor: pointer;
  width: 100%;
  box-shadow: 0 10px 32px rgba(23,162,184,0.7);
  transition: background 0.4s ease, box-shadow 0.35s ease;
  font-family: 'Poppins', sans-serif;
}
.btn2:hover,
.btn2:focus {
  background: linear-gradient(135deg, #138588, #4ddac4);
  box-shadow: 0 15px 44px rgba(23,162,184,0.95);
  outline:none;
}
.btn2:active {
  transform: translateY(3px);
  box-shadow: 0 5px 14px rgba(23,162,184,0.9);
}
.error-message {
  color: #bd3131;
  display: none;
  font-weight: 700;
  font-size: 0.9rem;
  margin-top: -14px;
  margin-bottom: 14px;
  user-select:none;
}
#formResponse {
  margin-top: 1.4rem;
  font-weight: 700;
  font-size: 1.1rem;
  text-align: center;
  color: #0b665c;
  text-shadow: 0 0 6px #20ceb7bb;
  min-height: 1.5rem;
  user-select:none;
}

/* Responsive */
@media (max-width: 768px) {
  .navbar {
    flex-wrap: wrap;
  }
  nav ul {
    justify-content: center;
    flex-wrap: wrap;
  }
  #about .row {
    flex-direction: column;
    gap: 25px;
  }
  .about-col-1, .about-col-2 {
    max-width: 100%;
  }
  #contact .row {
    flex-direction: column;
    gap: 30px;
  }
  .contact-left, .contact-right {
    max-width: 100%;
  }
  .work img {
    height: 160px;
  }
}

/* Modal styles */
.modal {
  position: fixed;
  z-index: 1500;
  left: 0; right: 0; top: 0; bottom: 0;
  background: rgba(0,0,0,0.75);
  display: none;
  justify-content: center;
  align-items: center;
  padding: 2rem;
  overflow-y: auto;
}
.modal.active {
  display: flex;
  animation: fadeIn 0.3s ease forwards;
}
@keyframes fadeIn {
  from {opacity: 0;}
  to {opacity:1;}
}
.modal-content {
  background: white;
  border-radius: 20px;
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 24px 48px rgba(0,0,0,0.25);
  position: relative;
  padding: 2.4rem 2.8rem 3rem 2.8rem;
  font-family: 'Fira Mono', monospace;
  color: #222;
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.6rem;
}
.modal-header h2 {
  font-weight: 900;
  font-size: 2rem;
  color: #10504c;
  user-select:none;
}
.close-btn {
  cursor: pointer;
  font-size: 2.4rem;
  font-weight: bold;
  color: #666;
  border: none;
  background: none;
  transition: color 0.3s ease;
  user-select:none;
}
.close-btn:hover,
.close-btn:focus {
  color: #17a2b8;
  outline:none;
}
.modal-tabs {
  display: flex;
  gap: 1.2rem;
  margin-bottom: 1rem;
  user-select:none;
}
.modal-tab {
  padding: 12px 28px;
  font-size: 1.1rem;
  font-weight: 600;
  border-radius: 35px;
  border: 2px solid #17a2b8;
  cursor: pointer;
  color: #17a2b8;
  background: #d6f1f5cc;
  transition: background 0.3s ease, color 0.3s ease;
}
.modal-tab.active {
  background: #17a2b8;
  color: white;
  box-shadow: 0 0 8px #17a2b8bb;
}
.modal-body {
  background: #f4f9f9;
  border-radius: 15px;
  padding: 1rem 1.5rem;
  font-size: 1rem;
  overflow-x: auto;
  white-space: pre-wrap;
  max-height: 65vh;
  box-shadow: inset 0 0 30px #53c2bf88;
  font-family: 'Fira Mono', monospace;
  color: #114841;
  user-select:none;
}
.iframe-preview {
  width: 100%;
  height: 65vh;
  border: none;
  border-radius: 16px;
  box-shadow: 0 10px 40px #15bfbca8;
}

/* quiz code  */
* {
    margin: 0;
    padding: 0;
    font-family: 'Poppins','sans-serif';
    box-sizing: border-box;
}
body{
background-color: #001e4d;
}
.app{
    background: #fff;
    width: 90%;
    max-width: 600px;
    margin: 100px auto 0;
    border-radius: 10px;
    padding: 30px;
}
.app h1{
    font-size: 25px;
    color: #001e4d;
    font-weight: 600;
    border-bottom:1px solid #333;
    padding-bottom:30px;
}
.quiz{
    padding: 20px 0;
}
.quiz h2{
    font-size: 18px;
    color: #001e4d;
    font-weight: 600;
}
.btn{
    background: #fff;
    color: #222;
    font-weight: 500;
    width: 100%;
    border:1px solid #222;
    padding: 10px;
    margin: 10px 0;
    text-align: left;
    border-radius: 4px;
    cursor: pointer;
    
    transition: all 0.3s;
}
.btn:hover:not([disabled]){
    background: #222;
    color:#fff;
}
.btn:disabled{
    cursor: no-drop;
}
#next-btn{
    background: #001e4d;
    color: #fff;
    font-weight: 500;
    width: 150px;
    border: 0;
    padding: 10px;
    margin: 20px auto 0;
    border-radius: 4px;
    cursor: pointer;
    display:none;
}
.correct{
    background: #9aeabc;
}
.incorrect{
    background: #ff9393;
}
/* Modal Basic Styles */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0; top: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.6);
  justify-content: center;
  align-items: center;
}
.modal.active {
  display: flex;
}
.modal-content {
  background: #fff;
  padding: 20px;
  width: 90%;
  max-width: 700px;
  border-radius: 8px;
  position: relative;
}
.close-btn {
  position: absolute;
  top: 10px; right: 15px;
  font-size: 24px;
  cursor: pointer;
}
.tab-buttons {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
}
.tab-btn.active {
  font-weight: bold;
  background: #333;
  color: white;
}
.code-panel {
  white-space: pre-wrap;
  background: #f4f4f4;
  padding: 10px;
  border: 1px solid #ccc;
}
.preview-panel {
  width: 100%;
  height: 300px;
  border: none;
}