body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #f4f7f7; 
}
.upper-div{
    width: 100%;
    height: 55px;
    background-color:  #00979D; 
    margin-top: 0%;
    padding-top: 10px;
}
.logo{
    width: 45px;
    margin-left: 20px;
    float: left;
    border-radius: 100%;
}
.upper-div p{
    color: white;
    font-size: 25px;
    margin-left: 75px;
    margin-top: 7px;
    font-weight: bold;
}
.upper-buttons{
    float: right;
    margin-top: 7px;
    margin-right: 380px;
}
.btn-u{
    width: 80px;
    height: 35px;
    font-size: 16px;
    font-weight: bold;
    background-color: transparent;
    color:#f4f7f7;
    border: none;
    margin-right: 40px;
    cursor: pointer;
    transition: all 0.3s ease;
}
.btn-u:hover {
    color: white;
    text-shadow: 0 0 10px #f4f7f7;
    transform: translateY(-3px);
}

.a{
    text-decoration: none;
    color: #f4f7f7;
}
.hero {
  text-align: center;
  padding: 60px 20px;
}

.btn-primary {
  display: inline-block;
  margin-top: 16px;
  background-color: #00979D;
  color: white;
  padding: 12px 20px;
  border-radius: 6px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease;
}
.btn-primary:hover {
  box-shadow: 0 0 10px #00979D;
}
.btn-sta{
    width: 150px;
    height: 35px;
    color: white;
    text-decoration: none;
    border: none;
    background-color: #00979D;
    font-size: 16px;
    font-weight: bold;
    border-radius: 6px;
    font-family:Arial, sans-serif;
    cursor: pointer;
    transition: all 0.3s ease;
}
.btn-sta:hover {
    box-shadow: 0 0 10px #00979D;
}
.aa{
    text-decoration: none;
    color: white;
}
.features {
  display: flex;
  gap: 20px;
  padding: 40px;

}

.fe-img{
    width: 300px;
    border-radius: 8px;
}
#fee-img{
    width: 350px;
    border-radius: 8px;
}
.new-ard{
    float: right;
    width: 320px;
    border-radius: 8px;
    margin-top: -10px;
}
.box {
  background: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  cursor: pointer;
  transition: all 0.3s ease;
}
.box:hover{
  transform: scale(1.02);
}
.path {
  background-color: #ffffff;
  margin: 40px auto;
  padding: 30px 24px;
  max-width: 800px;
  border-radius: 10px;
  box-shadow: 0 6px 14px rgba(0,0,0,0.08);
}

.path h2 {
  margin-bottom: 8px;
  color: #00979D; /* Arduino blue */
}

.path p {
  margin-bottom: 16px;
  color: #555;
}

.path ol {
  padding-left: 20px;
  list-style-position: inside;
  font-weight: 500;
}

.path li {
  margin-bottom: 10px;
  font-size: 16px;
  color: #333;
}
.new-a{
  color: #333;
  text-decoration: none;
}
.beginner {
  max-width: 900px;
  margin: auto;
  padding: 40px 20px;
}

.intro h1 {
  color: #00979D;
  margin-bottom: 10px;
}

.intro p {
  color: #555;
  font-size: 17px;
}
.who {
  margin-top: 50px;
}

.who h2 {
  color: #00979D;
  margin-bottom: 10px;
}

.who p {
  color: #555;
  margin-bottom: 14px;
}

.who ul {
  padding-left: 20px;
}

.who li {
  margin-bottom: 8px;
  color: #333;
}
.needs {
  margin-top: 50px;
}

.needs h2 {
  color: #00979D;
  margin-bottom: 10px;
}

.needs p {
  color: #555;
  margin-bottom: 14px;
}

.needs ul {
  padding-left: 20px;
}

.needs li {
  margin-bottom: 8px;
  color: #333;
}
.projects-list {
  margin-top: 50px;
}

.projects-list h2 {
  color: #00979D;
  margin-bottom: 8px;
}

.projects-list p {
  color: #555;
  margin-bottom: 20px;
}

.project {
  background-color: #ffffff;
  padding: 18px;
  border-radius: 8px;
  margin-bottom: 16px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
  cursor: pointer;
  transition: all 0.3s ease;
}
.project:hover{
  transform: scale(1.01);
}

.project h3 {
  margin-bottom: 6px;
  color: #333;
}

.project p {
  margin: 0;
  color: #555;
}
.mistakes {
  margin-top: 50px;
}

.mistakes h2 {
  color: #00979D;
  margin-bottom: 12px;
}

.mistakes ul {
  padding-left: 20px;
}

.mistakes li {
  margin-bottom: 8px;
  color: #333;
}
.what-is {
  margin-top: 40px;
}

.what-is h2 {
  color: #00979D;
  margin-bottom: 8px;
}

.what-is p {
  color: #555;
  margin-bottom: 10px;
}

.learn-more {
  color: #00979D;
  text-decoration: none;
  font-weight: 500;
}

.learn-more:hover {
  text-decoration: underline;
}
.next-steps {
  margin-top: 50px;
  margin-bottom: 60px;
}

.next-steps h2 {
  color: #00979D;
  margin-bottom: 10px;
}

.next-steps p {
  color: #555;
  margin-bottom: 14px;
}

.next-steps ul {
  padding-left: 20px;
}

.next-steps li {
  margin-bottom: 8px;
  color: #333;
}

.projects-page {
  max-width: 1100px;
  margin: auto;
  padding: 40px 20px;
}

.projects-intro h1 {
  color: #00979D;
  margin-bottom: 8px;
}

.projects-intro p {
  color: #555;
  margin-bottom: 30px;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.project-card {
  background-color: #ffffff;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 6px 16px rgba(0,0,0,0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 10px 24px rgba(0,0,0,0.12);
}

.project-card h3 {
  margin-bottom: 8px;
  color: #333;
}

.project-card p {
  color: #555;
  margin-bottom: 14px;
}
.project-card a:hover {
  text-decoration: underline;
}
.project-a{
    text-decoration: none;
}
.project-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.ard-imgg{
  width: 100%;
  border-radius: 8px;
}


.logo-link{
    text-decoration: none;
}




/* Difficulty badge */
.difficulty {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
}

.--beginner {
  background-color: #e0f7f7;
  color: #00979D;
}
.project-detail {
  max-width: 900px;
  margin: auto;
  padding: 40px 20px;
}

.project-header h1 {
  color: #00979D;
  margin-bottom: 10px;
}

.project-header p {
  color: #555;
  font-size: 17px;
  margin-bottom: 12px;
}
.project-section {
  margin-top: 40px;
}

.project-section h2 {
  color: #00979D;
  margin-bottom: 14px;
}

.components-list {
  list-style: disc;
  padding-left: 20px;
  color: #555;
}

.components-list li {
  margin-bottom: 6px;
  font-size: 16px;
}
.project-section {
  margin-top: 40px;
  max-width: 800px;
}

.project-section h2 {
  margin-bottom: 10px;
}

.project-section p {
  color: #555;
  line-height: 1.6;
}

.project-section ol {
  padding-left: 20px;
  line-height: 1.8;
}
.circuit-image {
  display: block;
  max-width: 100%;
  width: 600px;
  margin: 25px auto;
  border-radius: 12px;
  box-shadow: 0 6px 16px rgba(0,0,0,0.1);
}


.project-section {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
}

.project-section h2 {
    color: #00979D;
    margin-bottom: 15px;
}

.code-block {
    background: #0f172a;           /* dark code background */
    color: #e5e7eb;
    padding: 20px;
    border-radius: 10px;
    overflow-x: auto;
    font-size: 15px;
    line-height: 1.6;
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.code-block code {
    font-family: "Fira Code", monospace;
    white-space: pre;
}

.project-section h3 {
  margin-top: 20px;
  margin-bottom: 6px;
  color: #333;
}

.project-section p {
  color: #555;
  line-height: 1.7;
  font-size: 16px;
}

.project-section code {
  padding: 2px 6px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 15px;
}
.mistakes-list {
  padding-left: 20px;
  color: #555;
  line-height: 1.7;
}

.mistakes-list li {
  margin-bottom: 10px;
}

.mistakes-list code {
  background-color: #f1f5f9;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: monospace;
}
.project-section ul {
  list-style: disc;
  padding-left: 20px;
  line-height: 1.7;
  color: #555;
}

.project-section li {
  margin-bottom: 8px;
}
.button-exp{
    background-color: #00979D;
    color: white;
    padding: 10px 16px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}
.button-exp:hover {
    box-shadow: 0 0 10px #00979D;
}
.coming-soon {
    text-align: center;
    margin-top: 50px;
    padding: 30px;
    background-color: #e0f7f7;
    border-radius: 10px;
}

/* ------------------------------------------------------------------
   Responsive adjustments
   - Keep all current desktop rules untouched
   - Add overrides only for smaller viewports (tablets / phones)
   - Goals: header stacks properly, floats removed on small screens,
     images become fluid, feature boxes stack, paddings shrink.
   ------------------------------------------------------------------ */

/* Make images responsive by default on small screens */
img, .fe-img, #fee-img, .new-ard, .ard-imgg, .circuit-image {
  max-width: 100%;
  height: auto;
}

/* Tablet and small laptop and large-phone fallback */
/* Specific layout for larger tablets / small desktops (901px - 1024px)
   Keep desktop and other media unchanged. This targets widths where
   we want the header to show logo+title on the left and buttons on the right. */
@media (min-width: 901px) and (max-width: 1024px) {
  .upper-div {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 10px 18px;
    box-sizing: border-box;
    height: auto;
  }

  /* Group logo and site title together on the left */
  .logo-link {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    order: 0;
  }

  .logo {
    width: 48px;
    margin: 0;
    float: none;
    flex: 0 0 auto;
  }

  .upper-div p {
    margin: 0;
    font-size: 22px;
    font-weight: bold;
    color: #ffffff;
    text-align: left;
    flex: 0 1 auto;
  }

  /* Keep the menu buttons grouped on the right */
  .upper-buttons {
    display: flex;
    gap: 10px;
    align-items: center;
    margin: 0;
    float: none;
    order: 1;
    flex: 0 0 auto;
  }

  .btn-u {
    padding: 8px 12px;
    font-size: 15px;
  }
}

@media (max-width: 900px) {
  /* Header: make a predictable flex layout on tablet widths */
  .upper-div {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 8px 14px;
    box-sizing: border-box;
    height: auto;
  }

  /* Place logo + site title together on the left, menu buttons on the right */
  .logo-link {
    display: flex;
    align-items: center;
    gap: 8px;
    order: 0; /* keep left */
    text-decoration: none;
  }

  .logo {
    width: 44px;
    margin: 0;
    float: none;
    flex: 0 0 auto;
  }

  /* Title should sit immediately to the right of the logo and align left */
  .upper-div p {
    margin: 0;
    font-size: 20px;
    font-weight: bold;
    color: #ffffff;
    text-align: left;
    flex: 0 1 auto;
  }

  .upper-buttons {
    display: flex;
    gap: 8px;
    align-items: center;
    margin: 0;
    float: none;
    order: 1; /* push menu to the right */
    flex: 0 0 auto;
  }

  .btn-u {
    width: auto;
    height: 34px;
    padding: 6px 10px;
    margin-right: 0;
  }

  /* Hero spacing reduction for smaller widths */
  .hero {
    padding: 40px 16px;
  }

  /* Features: allow wrapping so cards flow naturally on narrower widths */
  .features {
    display: flex;
    gap: 16px;
    padding: 20px;
    justify-content: center;
    flex-wrap: wrap;
    box-sizing: border-box;
  }

  /* Boxes become flex items; remove floats so they align in the flex container */
  .box {
    width: 254px;
    max-width: 100%;
    float: none;
    box-sizing: border-box;
  }

  /* Ensure feature images fit their containers */
  .fe-img, #fee-img, .new-ard {
    width: 100%;
    max-width: 420px;
    margin: 0 auto;
    display: block;
  }

  /* Path layout: avoid small, fragile floats and let content flow under images */
  .path img{
    float: right;
    display: block;
    width: 100%;
    max-width: 290px;
  }

  .path ol {
    padding-left: 0px;
    max-width: 420px;
  }

  /* Path and container paddings shrink to fit */
  .path, .beginner, .projects-page, .project-detail, .project-section {
    padding-left: 16px;
    padding-right: 16px;
    margin-left: 12px;
    margin-right: 12px;
    box-sizing: border-box;
  }

  /* Remove floats used for two-column layouts so blocks stack */
  .new-ard, .projects-list, .who, .needs {
    float: none;
    width: 100%;
  }

  /* Make project cards and project sections slightly more compact */
  .project, .project-card {
    padding: 14px;
  }

  /* Code blocks remain usable on small screens */
  .code-block {
    font-size: 14px;
    padding: 14px;
  }

  /* Buttons scale down slightly */
  .btn-sta, .button-exp {
    padding: 8px 12px;
    font-size: 15px;
  }

}

/* Phones and very small screens */
@media (max-width: 480px) {
  /* Header: stack and center everything, place logo visually on top */
  .upper-div {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 12px;
    height: auto;
    box-sizing: border-box;
  }

  /* Force visual ordering: logo first, then title, then buttons */
  .logo {
    order: -1; /* appear above title */
    margin: 0 0 6px 0;
    display: block;
    width: 54px; /* slight bump so logo is visible on tiny screens */
    height: auto;
    float: left;
  }

  /* Ensure the title centers and doesn't keep any left margin/float */
  .upper-div p {
    order: 0;
    margin: 0;
    font-size: 18px;
    text-align: center;
    font-weight: bold;
    color: #ffffff;
    float: left;
    line-height: 1.1;
    margin-top: 0px;
    margin-left: 5px;
  }

  /* Buttons: center and allow wrapping, put after title */
  .upper-buttons {
    order: 1;
    display: flex;
    gap: 6px;
    justify-content: center;
    align-items: center;
    width: 100%;
    margin: 0;
    float: none;
    padding: 6px 0 4px 0;
    box-sizing: border-box;
    flex-wrap: wrap;
  }

  .btn-u {
    width: auto;
    padding: 6px 10px;
    font-size: 13px;
    margin-right: 0;
  }

  /* Features: stack vertically and center content */
  .features {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 12px 12px;
    gap: 12px;
    box-sizing: border-box;
  }

  /* Boxes: full width but bounded by a max-width so they look tidy */
  .box {
    width: 100%;
    max-width: 380px;
    margin: 8px auto;
    float: none;
    box-sizing: border-box;
  }

  /* Ensure path and main containers center and don't overflow */
  .path, .beginner, .projects-page, .project-detail, .project-section {
    padding-left: 12px;
    padding-right: 12px;
    margin: 12px auto;
    box-sizing: border-box;
    max-width: 100%;
  }

  /* Path images shouldn't float on small screens */
  .path img {
    float: none;
    display: block;
    margin: 12px auto;
    width: 100%;
    max-width: 320px;
  }

  /* Ensure `.new-ard` sits at the bottom of its parent container on very small screens */
  .new-ard {
    order: 99;              /* place it after other flex children */     /* center horizontally */
    width: 100%;
    max-width: 320px;      /* keep a sensible max so it doesn't stretch too wide */   /* small gap above, auto horizontal centering */
    float:right;
    display: block;
    box-sizing: border-box;
  }

  /* Normalize headings and paragraph spacing for readability */
  .project-section h2, .who h2, .needs h2, .projects-intro h1, .intro h1 {
    font-size: 20px;
    margin: 8px 0;
  }

  .path{
    width: 90%;
  }
  .project-section p, .intro p, .project p, .who p, .needs p {
    font-size: 15px;
    margin: 6px 0;
  }

  /* Keep code blocks usable on very small screens */
  .code-block {
    font-size: 13px;
    padding: 12px;
  }

  /* Slightly smaller badges */
  .difficulty {
    padding: 5px 10px;
    font-size: 13px;
  }
}

/* Small accessibility improvement: ensure focus outlines remain visible */
:focus {
  outline: 3px solid rgba(0,151,157,0.18);
  outline-offset: 2px;
}