/* style.css — Instagram Explore Page Styles
   Míriam Domínguez Martínez - 03.03.26
*/

/* ================================================================
   1. FONTS LOCALLY
*/

@font-face {
  font-family: 'Nunito';
  src: url('./fonts/Nunito/Nunito-Regular.ttf') format('truetype');
  font-weight: 400;
}

@font-face {
  font-family: 'Nunito';
  src: url('./fonts/Nunito/Nunito-SemiBold.ttf') format('truetype');
  font-weight: 600;
}

@font-face {
  font-family: 'Nunito';
  src: url('./fonts/Nunito/Nunito-Bold.ttf') format('truetype');
  font-weight: 700;
}

/* ================================================================
   2. GLOBAL BASE STYLES
*/

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box; /* Ensures padding and border are included in element's total width/height */
}

body {
  font-family: 'Nunito', sans-serif;
  background-color: #fafafa;
  color: #262626;
  min-height: 100vh; /* Ensures body takes full viewport height */
}

/* ================================================================
   3. HEADER NAVIGATION BAR
*/

.site-header {
  position: sticky; /* Sticks to top of viewport when scrolling */
  top: 0; 
  z-index: 100; /* Ensures header stays above other content */
  background-color: #ffffff;
  border-bottom: 1px solid #dbdbdb;
  display: flex; /* Flexbox for horizontal layout */
  align-items: center;
  justify-content: flex-start; /* Aligns items to the left */
  gap: 24px; /* Space between logo, search bar, and buttons */
  padding: 12px 24px; /* Vertical and horizontal padding */
}

/* Logo styling in header */
.logo {
  font-size: 22px; 
  font-weight: 700;
  letter-spacing: -0.5px;
  white-space: nowrap; /* Prevents logo from breaking into multiple lines */
  flex-shrink: 0; /* Prevents logo from shrinking when space is limited */
}

/* ================================================================
   4. SEARCH BAR SECTION
*/

.search-bar {
  flex: 1; /* Allows search bar to grow and fill available space */
  max-width: 280px; /* Limits search bar width */
}

.search-input {
  width: 100%;
  padding: 9px 16px; 
  background-color: #efefef;
  border: none;
  border-radius: 8px; /* Rounded corners */
  font-size: 14px;
  font-family: inherit; 
  color: #262626;
  outline: none; /* Remove default focus outline */
  transition: background-color 0.15s ease; /* Smooth background color transition on focus */
}

/* Placeholder text styling */
.search-input::placeholder {
  color: #8e8e8e;
}

/* Change background color on focus for better visibility */
.search-input:focus {
  background-color: #e2e2e2;
}

/* ================================================================
   5. HEADER ACTION BUTTONS
*/

.header-actions {
  display: flex; /* Flexbox for horizontal layout of buttons */
  gap: 12px; /* Space between buttons */
  margin-left: auto;
  flex-shrink: 0; /* Prevents buttons from shrinking when space is limited */
}

/* ================================================================
   6. BUTTON STYLES
*/

.btn {
  padding: 8px 20px; 
  border: none;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer; /* Pointer cursor on hover */
  transition: all 0.2s ease; /* Smooth transition for hover effects */
  font-family: inherit; 
}

.btn-primary {
  background-color: #0095f6;
  color: #ffffff;
}

.btn-primary:hover {
  background-color: #0081cc;
}

.btn-secondary {
  background-color: transparent;
  color: #0095f6;
  border: 1px solid #0095f6;
}

.btn-secondary:hover {
  background-color: #f0f9ff;
}

/* ================================================================
   7. PAGE TITLE SECTION
*/

.page-title-section {
  text-align: left; /* Aligns title to the left */
  margin: 32px 0 24px 0; /* Top margin for spacing from header, bottom margin for spacing from filters */
}

.page-title {
  font-size: 28px; /* Larger font size for main title */
  font-weight: 700; 
  color: #262626;
}

/* ================================================================
   8. FILTER SECTION
*/

.filter-section {
  display: flex; /* Flexbox for horizontal layout of filter buttons */
  gap: 12px; /* Space between filter buttons */
  margin-bottom: 32px; /* Spacing between filters and main content */
  justify-content: flex-start; /* Aligns filter buttons to the left */
}

.filter-btn {
  padding: 8px 16px;
  background-color: #f0f0f0;
  border: none;
  border-radius: 20px; /* Pill-shaped buttons */
  font-size: 14px; /* Smaller font size for filter buttons */
  font-weight: 600;
  color: #262626;
  cursor: pointer; /* Pointer cursor on hover */
  transition: all 0.2s ease; /* Smooth transition for hover and active states */
  font-family: inherit;
}

.filter-btn:hover {
  background-color: #e0e0e0;
}

.filter-btn.active {
  background-color: #262626;
  color: #ffffff;
}

/* ================================================================
   9. MAIN CONTENT WRAPPER
*/

.main-content {
  max-width: 935px;
  margin: 0 auto; /* Centers main content horizontally */
  padding: 24px; /* Adds whitespace around edges */
}

/* ================================================================
   10. GRID SECTION
*/

.grid-section {
  margin-bottom: 48px; /* Spacing between sections */
  display: flex; /* Flexbox for vertical layout of section header and carousel */
  flex-direction: column; /* Stacks header and carousel vertically */
  align-items: flex-start; /* Aligns section header to the left */
}

/* ================================================================
   11. GRID INNER WRAPPER
*/

.grid-inner {
  width: 100%; /* Ensures carousel takes full width of section */
}

/* ================================================================
   12. SECTION HEADER
*/

.section-header {
  display: flex; /* Flexbox for horizontal layout of title and arrow */
  align-items: center; /* Vertically centers title and arrow */
  justify-content: space-between; /* Pushes title to left and arrow to right */
  margin-bottom: 12px; /* Spacing between header and carousel */
  gap: 12px; /* Space between title and arrow */
}

.section-title {
  font-size: 16px;
  font-weight: 700;
  color: #262626;
}

.section-arrow {
  font-size: 20px;
  color: #262626;
  text-decoration: none;
  cursor: pointer;
  transition: color 0.2s ease;
}

.section-arrow:hover {
  color: #0095f6;
}

/* ================================================================
   13. PHOTO GRID CAROUSELn
*/

.photo-grid {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 10px;
  align-items: flex-start; /* Aligns items to the top of the carousel */
}

/* ================================================================
   14. GRID ITEMS
*/

.grid-item {
  position: relative; /* Allows for absolute positioning of labels */
  border-radius: 8px; /* Rounded corners for images */
  width: 160px;
  height: 280px;
  flex-shrink: 0;
  overflow: hidden; /* Ensures images don't overflow their container */
  cursor: pointer; /* Pointer cursor on hover */
  background-color: #dbdbdb;
  transition: transform 0.2s ease; /* Smooth scaling on hover */
}

.grid-item img {
  width: 100%;
  height: 100%;
  object-fit: cover; /* Ensures image covers entire grid item without distortion */
  display: block; /* Removes default inline spacing below images */
  transition: transform 0.3s ease; /* Smooth scaling on hover */
}

.grid-item:hover {
  transform: scale(1.02);
}

.grid-item:hover img {
  transform: scale(1.04);
}

/* ================================================================
   15. GRID LABEL
*/

.grid-label {
  position: absolute; /* Allows label to be positioned over the image */
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,0), rgba(0,0,0,0.7)); /* Gradient for better text visibility */
  color: #ffffff;
  padding: 16px 12px; /* Padding for label text */
  font-size: 14px; /* Smaller font size for labels */
  font-weight: 600;
  text-align: left;
}

/* ================================================================
   16. FOOTER
*/

.site-footer {
  text-align: center; /* Centers footer text */
  background-color: #ffffff;
  padding: 24px;
  border-top: 1px solid #dbdbdb; /* Adds a top border to separate footer from main content */
  font-size: 13px; 
  color: #8e8e8e;
  margin-top: 150px; /* Adds spacing between main content and footer */
}