/* ============================================
   Root Variables & Global Styles - Material 3
============================================ */
:root {
  --m3-primary: #392404;
  --m3-primary-container: #614b29;
  --m3-on-primary: #ffffff;
  --m3-on-primary-container: #f9ebd7;
  
  --m3-secondary: #b6ac46;
  --m3-secondary-container: #eae7c2;
  --m3-on-secondary: #ffffff;
  --m3-on-secondary-container: #24210e;
  
  --m3-tertiary: #937953;
  --m3-tertiary-container: #f3e0c7;
  --m3-on-tertiary: #ffffff;
  --m3-on-tertiary-container: #291f15;
  
  --m3-surface: #faf5eb;
  --m3-surface-variant: #f1e7d6;
  --m3-surface-dim: #e8e0d0;
  --m3-surface-bright: #fff8ed;
  --m3-surface-container-lowest: #ffffff;
  --m3-surface-container-low: #f7f2e8;
  --m3-surface-container: #f2ede2;
  --m3-surface-container-high: #ede7dc;
  --m3-surface-container-highest: #e7e1d6;
  
  --m3-on-surface: #211400;
  --m3-on-surface-variant: #4a3a24;
  
  --m3-outline: #8c7c5a;
  --m3-outline-variant: #d0c5b1;
  --m3-error: #ba1a1a;
  --m3-on-error: #ffffff;
  
  --m3-shadow-1: 0px 1px 3px rgba(0,0,0,0.12), 0px 1px 2px rgba(0,0,0,0.14);
  --m3-shadow-2: 0px 3px 6px rgba(0,0,0,0.15), 0px 2px 4px rgba(0,0,0,0.12);
  --m3-shadow-3: 0px 10px 20px rgba(0,0,0,0.15), 0px 3px 6px rgba(0,0,0,0.10);
  --m3-shadow-4: 0px 15px 25px rgba(0,0,0,0.15), 0px 5px 10px rgba(0,0,0,0.05);
  --m3-shadow-5: 0px 20px 40px rgba(0,0,0,0.2);
  
  --m3-shape-small: 8px;
  --m3-shape-medium: 16px;
  --m3-shape-large: 24px;
  --m3-shape-extra-large: 32px;
  
  --primary-color: var(--m3-primary);
  --secondary-color: var(--m3-secondary);
  --accent-color: var(--m3-tertiary);
  --light-bg: var(--m3-surface);
  --text-dark: var(--m3-on-surface);
  --text-light: #c6c6c6;

  --animation-standard: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --animation-decelerate: 0.3s cubic-bezier(0.0, 0.0, 0.2, 1);
  --animation-accelerate: 0.3s cubic-bezier(0.4, 0.0, 1, 1);
  --hover-overlay: rgba(255, 255, 255, 0.08);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Roboto', sans-serif;
  margin: 0;
  padding: 0;
  color: var(--m3-on-surface);
  background-color: var(--m3-surface);
  line-height: 1.5;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 500;
  margin-top: 0;
  line-height: 1.2;
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

.m3-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--m3-shape-small);
  padding: 10px 24px;
  font-weight: 500;
  font-size: 0.875rem;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  min-height: 40px;
  background-color: var(--m3-primary);
  color: var(--m3-on-primary);
  box-shadow: var(--m3-shadow-1);
  letter-spacing: 0.5px;
  outline: none;
}

.m3-button::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background-color: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.4s ease, height 0.4s ease;
  z-index: 1;
  pointer-events: none;
}

.m3-button:hover::after {
  width: 300px;
  height: 300px;
}

.m3-button > * {
  position: relative;
  z-index: 2;
}

.m3-button:hover {
  box-shadow: var(--m3-shadow-2);
  background-color: var(--m3-primary-container);
  color: var(--m3-on-primary-container);
}

.m3-button:active {
  box-shadow: var(--m3-shadow-1);
  transform: translateY(1px);
}

.m3-button.outlined {
  background-color: transparent;
  border: 1px solid var(--m3-outline);
  color: var(--m3-primary);
}

.m3-button.outlined:hover {
  background-color: rgba(57, 36, 4, 0.08);
}

.m3-button .material-icons {
  font-size: 18px;
}

.m3-text-field {
  position: relative;
  margin: 16px 0;
  width: 100%;
}

.m3-text-field input {
  width: 100%;
  padding: 12px 16px;
  font-size: 1rem;
  border: 2px solid var(--m3-outline-variant);
  border-radius: var(--m3-shape-small);
  background: var(--m3-surface-container);
  transition: all 0.2s;
  outline: none;
  color: var(--m3-on-surface);
}

.m3-text-field label {
  position: absolute;
  top: 50%;
  left: 16px;
  transform: translateY(-50%);
  background-color: var(--m3-surface-container);
  padding: 0 4px;
  font-size: 1rem;
  color: var(--m3-outline);
  transition: all 0.2s;
  pointer-events: none;
}

.m3-text-field input:focus,
.m3-text-field input:not(:placeholder-shown) {
  border-color: var(--m3-primary);
  padding-top: 20px;
  padding-bottom: 4px;
}

.m3-text-field input:focus + label,
.m3-text-field input:not(:placeholder-shown) + label {
  top: 0;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--m3-primary);
}

/* ============================================
   Material 3 Table Styles
============================================ */
table {
  width: 100% !important;
  border-collapse: collapse !important;
  margin-top: 20px !important;
  background: var(--m3-surface-container) !important;
  border-radius: var(--m3-shape-small) !important;
  overflow: hidden !important;
  box-shadow: var(--m3-shadow-1) !important;
}

table th,
table td {
  padding: 12px 16px !important;
  text-align: left !important;
  border-bottom: 1px solid var(--m3-outline-variant) !important;
}

table th {
  background: var(--m3-primary) !important;
  color: var(--m3-on-primary) !important;
  font-weight: 500 !important;
}

table tr:last-child td {
  border-bottom: none !important;
}

table tr:hover {
  background: var(--m3-surface-variant) !important;
}

table a.view-button,
.view-button {
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  padding: 8px 16px !important;
  background-color: var(--m3-primary) !important;
  color: var(--m3-on-primary) !important;
  border: none !important;
  border-radius: var(--m3-shape-small) !important;
  font-weight: 500 !important;
  text-decoration: none !important;
  cursor: pointer !important;
  transition: all 0.3s ease !important;
  box-shadow: var(--m3-shadow-1) !important;
}

table a.view-button:hover,
.view-button:hover {
  background-color: var(--m3-primary-container) !important;
  color: var(--m3-on-primary-container) !important;
  box-shadow: var(--m3-shadow-2) !important;
}

.content-container {
  max-width: 1200px !important;
  margin: 0 auto !important;
  padding: 20px !important;
  background-color: var(--m3-surface) !important;
  border-radius: var(--m3-shape-medium) !important;
  box-shadow: var(--m3-shadow-1) !important;
}

.page-title {
  color: var(--m3-primary) !important;
  margin-bottom: 20px !important;
  padding-bottom: 10px !important;
  border-bottom: 1px solid var(--m3-outline-variant) !important;
}

.table-responsive {
  overflow-x: auto !important;
  border-radius: var(--m3-shape-small) !important;
  box-shadow: var(--m3-shadow-1) !important;
}

@media (max-width: 768px) {
  table th, 
  table td {
    padding: 10px 12px !important;
  }
  
  .view-button {
    padding: 6px 12px !important;
    font-size: 0.875rem !important;
  }
}

@media (max-width: 480px) {
  table th, 
  table td {
    padding: 8px 10px !important;
    font-size: 0.875rem !important;
  }
  
  .view-button {
    padding: 4px 10px !important;
    font-size: 0.75rem !important;
  }
}

/* ============================================
   Header, Logo & College Name
============================================ */
header {
  background-color: var(--m3-surface-container);
  color: var(--m3-on-surface);
  padding: 15px 20px;
  border-radius: var(--m3-shape-medium) var(--m3-shape-medium) 0 0;
  box-shadow: var(--m3-shadow-1);
  position: relative;
  z-index: 100;
}

.logo-container {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

/* .logo-college-wrapper {
  padding: 0 10px;
} */

.logo-college-container {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  margin: 0 0 10px 0;
}
.logo{
  display: flex;
  align-items: center;
  justify-content: center;
  /* 
   */
  padding: 0;   
}

.logo img {
  height: 50px;
  width: 80%;
  
  object-fit: contain;
  border-radius: var(--m3-shape-small);
}

.college-name {
  text-align: left;
  margin-left: 37px;
}

.college-name h1 {
  font-size: 1.5rem;
  margin: 0px;
  line-height: 1.2;
  font-weight: 500;
  color: var(--m3-primary);
}

.college-name p {
  font-size: 0.8rem;
  margin: 2px 0;
  color: var(--m3-on-surface-variant);
}

/* ============================================
   Faculty Links (.facu)
============================================ */
.facu {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
  margin: 15px 25px 0 0;
  padding: 0;
}

.facu a {
  color: var(--m3-primary);
  text-decoration: none;
  text-align: center;
  padding: 5px 8px;
  border-radius: var(--m3-shape-small);
  transition: all 0.2s ease;
  font-weight: 500;
  position: relative;
}

.facu a:hover {
  color: var(--m3-primary-container);
  text-decoration: underline;
  background-color: transparent;
}

/* ============================================
   Navigation - Material 3
============================================ */
.nav {
  background-color: var(--m3-primary);
  color: var(--m3-on-primary);
  box-shadow: var(--m3-shadow-2);
  position: relative;
  padding: 0;
  z-index: 99;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

.nav-list li {
  position: relative;
  padding: 0;
}

.nav-list a {
  color: inherit;
  text-decoration: none;
  padding: 12px 15px;
  display: block;
  transition: all 0.2s ease;
  border-radius: var(--m3-shape-small);
}

.nav-dropdown-icon {
  font-size: 16px;
  margin-left: 4px;
  transition: transform 0.2s ease;
}

.nav-list > li > a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--m3-on-primary);
  transform: scaleX(0);
  transition: transform 0.2s ease;
}

.nav-list > li > a:hover::after {
  transform: scaleX(1);
}

.nav-list a:hover {
}

.nav-list a:hover .nav-dropdown-icon {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  background-color: var(--m3-surface-container-high); 
  top: 100%;
  left: 0;
  width: 200px;
  box-shadow: var(--m3-shadow-3);
  border-radius: var(--m3-shape-small);
  z-index: 1000;
  overflow: hidden;
  display: none;
  padding: 0;
  margin: 0;
  list-style: none;
  transition: none;
}

.dropdown:hover .dropdown-menu {
  display: block;
  
}

.dropdown-menu li {
  border-bottom: 1px solid var(--m3-outline-variant);
  margin: 0;
  padding: 0;
}

.dropdown-menu a {
  padding: 12px 16px;
  color: var(--m3-on-surface);
  transition: all 0.2s ease;
}

.dropdown-menu a:hover {
  background-color: var(--m3-tertiary) !important;
  padding-left: 20px;
}

/* ============================================
   Mobile Navigation
============================================ */    
.mobile-nav-header {
  display: none;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
  background-color: var(--m3-primary);
}

.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 12px;
  border-radius: var(--m3-shape-small);
  cursor: pointer;
}

.hamburger span {
  width: 25px;
  height: 2px;
  background: var(--m3-on-primary);
  transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-nav-header .mobile-home {
  color: var(--m3-on-primary);
  text-decoration: none;
  padding: 12px;
  border-radius: var(--m3-shape-small);
}

.mobile-nav-header .mobile-home:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

/* ============================================
   Media Queries
============================================ */
@media (max-width: 457px) {
  /* .logo {
    padding-left: 118px;
  }
} */}

@media (max-width: 968px) {
  .facu {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    width: 100%;
    margin: 10px 0 0 0;
    padding: 5px 0;
  }
  
  .facu a {
    display: inline-block;
    padding: 2px 6px;
    color: var(--m3-primary);
    font-size: 0.7rem;
    font-weight: 500;
    text-transform: uppercase;
    background: transparent;
    border: none;
    transition: all 0.2s ease;
  }
  
  .facu a:hover, .facu a:active {
    color: var(--m3-primary-container);
    text-decoration: underline;
  }
  
  .facu a:not(:last-child)::after {
    content: none;
  }
  
  .college-name h1 {
    font-size: 1.4rem;
  }
  
  .college-name p {
    font-size: 0.75rem;
  }
  
  .nav-list {
    flex-direction: column;
    display: none;
    padding: 10px 0;
  }
  
  .nav-list.open {
    display: flex;
  }
  
  .nav-list > li {
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  .desktop-home {
    display: none;
  }
  
  
  .dropdown-menu {
    position: static;
    width: 100%;
    background-color: rgba(0, 0, 0, 0.15);
    display: none;
    box-shadow: none;
    border-radius: 0;
    animation: none;
    transform: none;
    transition: none;
    visibility: visible;
    opacity: 1;
  }
  .dropdown-menu a{
    color: var(--m3-on-tertiary);
  }
  
  .dropdown.active .dropdown-menu {
    transform: none;
    display: block;
  }
  
  .nested-dropdown-menu {
    position: static;
    width: 100%;
    background-color: rgba(0, 0, 0, 0.15);
    padding-left: 20px;
    animation: none;
  }
  
  .nested-dropdown:hover .nested-dropdown-menu {
    display: none;
  }
  
  .nested-dropdown.active .nested-dropdown-menu {
    display: block;
  }
  
  .mobile-nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background-color: var(--m3-primary);
  }
}

/* ============================================
   Footer - Material 3 - Fixed Version
============================================ */
.footer {
  background: var(--m3-primary);
  color: var(--m3-on-primary);
  padding: 40px 5% 20px;
  margin-top: 48px;
  border-radius: var(--m3-shape-medium) var(--m3-shape-medium) 0 0;
  box-sizing: border-box;
  position: relative;
  width: 100%;
  clear: both;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.footer-section {
  padding: 0 10px;
}

.footer-section h3 {
  font-size: 1.2rem;
  margin-top: 0;
  margin-bottom: 20px;
  position: relative;
  font-weight: 500;
  color: var(--m3-on-primary);
}

.footer-section h3::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 40px;
  height: 3px;
  background: var(--m3-tertiary-container);
  border-radius: 2px;
}

.m3-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.m3-list li {
  margin-bottom: 10px;
}

.m3-list li a {
  color: var(--m3-on-primary);
  text-decoration: none;
  opacity: 0.85;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: var(--m3-shape-small);
  position: relative;
}

.m3-list li a:hover {
  opacity: 1;
  transform: translateX(4px);
  background-color: transparent;
}

.m3-list .material-icons {
  font-size: 18px;
  transition: transform 0.3s ease;
}

.m3-list li a:hover .material-icons {
  transform: translateX(3px);
}

.contact-info {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 12px;
}

.contact-info .material-icons {
  opacity: 0.85;
  flex-shrink: 0;
}

.contact-info p {
  margin: 0;
  font-size: 0.95rem;
}

.social-links {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.m3-icon-button {
  color: var(--m3-on-primary);
  background: transparent;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.m3-icon-button:hover {
  transform: translateY(-2px);
  border-color: var(--m3-on-primary);
  background-color: transparent;
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  opacity: 0.8;
  font-size: 0.875rem;
}

.m3-form {
  margin-top: 15px;
}

.m3-form .m3-text-field {
  margin: 0 0 15px;
}

.m3-form .m3-text-field input {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--m3-on-primary);
}

.m3-form .m3-text-field label {
  color: rgba(255, 255, 255, 0.7);
  background-color: transparent;
}

.m3-form .m3-text-field input:focus + label,
.m3-form .m3-text-field input:not(:placeholder-shown) + label {
  color: var(--m3-on-primary);
}

.m3-form .m3-button {
  background-color: var(--m3-tertiary);
  border: none;
  width: 100%;
}

.m3-form .m3-button:hover {
  background-color: var(--m3-tertiary-container);
}

@media (max-width: 768px) {
  .footer {
    padding: 30px 5% 15px;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .footer-section {
    margin-bottom: 25px;
  }
  
  .footer-section:last-child {
    margin-bottom: 0;
  }
}

@media (max-width: 480px) {
  .footer {
    padding: 25px 5% 15px;
    margin-top: 30px;
  }
  
  .footer-section h3 {
    margin-bottom: 15px;
  }
  
  .contact-info p {
    font-size: 0.9rem;
  }
  
  .footer-bottom {
    padding-top: 15px;
  }
}

.floating-contact-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: #2196F3;
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    cursor: pointer;
    transition: transform 0.3s, background 0.3s;
    z-index: 1000;
}

.floating-contact-btn:hover {
    transform: scale(1.1);
    background: #1976D2;
}

.contact-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1001;
    align-items: center;
    justify-content: center;
}

.contact-modal.active {
    display: flex;
}

.contact-form-container {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    width: 90%;
    max-width: 500px;
    position: relative;
    animation: slideIn 0.3s ease-out;
}

.contact-form-container h2 {
    margin-bottom: 1.5rem;
    color: #333;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group input,
.form-group textarea {
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: #2196F3;
    outline: none;
}

.contact-actions {
    display: flex;
    gap: 10px;
    justify-content: space-between;
    margin-top: 20px;
}

.contact-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s ease;
}

.contact-btn.primary {
    background-color: #007bff;
    color: white;
}

.contact-btn.secondary {
    background-color: #6c757d;
    color: white;
}

.contact-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.contact-btn i {
    font-size: 18px;
}

@media (max-width: 600px) {
    .contact-actions {
        flex-direction: column;
    }
    
    .contact-btn {
        width: 100%;
        justify-content: center;
    }
}

.contact-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.contact-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background 0.3s;
}

.contact-btn.primary {
    background: #2196F3;
    color: white;
}

.contact-btn.secondary {
    background: #4CAF50;
    color: white;
}

.close-modal {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: #666;
}

@keyframes slideIn {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@media (max-width: 768px) {
    .contact-actions {
        flex-direction: column;
    }
    
    .floating-contact-btn {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
    }
}

.card, .m3-card {
  transition: transform var(--animation-standard), box-shadow var(--animation-standard);
}

.card:hover, .m3-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--m3-shadow-3);
}

a:focus, button:focus, input:focus, textarea:focus, select:focus {
  outline: 2px solid var(--m3-tertiary);
  outline-offset: 2px;
}

.page-transition {
  animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.ripple {
  position: relative;
  overflow: hidden;
}

.ripple::after {
  content: "";
  display: block;
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  pointer-events: none;
  background-image: radial-gradient(circle, #fff 10%, transparent 10.01%);
  background-repeat: no-repeat;
  background-position: 50%;
  transform: scale(10, 10);
  opacity: 0;
  transition: transform 0.5s, opacity 1s;
}

.ripple:active::after {
  transform: scale(0, 0);
  opacity: 0.3;
  transition: 0s;
}

#back-to-top {
  position: fixed;
  right: 37px;
  width: 50px;
  height: 50px;
  background-color: var(--m3-primary);
  color: var(--m3-on-primary);
  border: none;
  border-radius: 50%;
  box-shadow: var(--m3-shadow-3);
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.3s ease, transform 0.3s ease, background-color 0.3s ease;
  z-index: 999;
}

#back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}

#back-to-top:hover {
  background-color: var(--m3-primary-container);
  color: var(--m3-on-primary-container);
  transform: translateY(-5px);
}

#back-to-top i {
  font-size: 24px;
}

@media (max-width: 768px) {
  #back-to-top {
    width: 40px;
    height: 40px;
    right: 27px;
  }
  
  #back-to-top i {
    font-size: 18px;
  }
}