:root {
  --bg-primary: #060c10;
  --text-color:#f0f0cad9;
  --python-blue: #0099ff;
  --python-yellow: #fdbb3e;
    --python-gradient-text: linear-gradient(
    90deg,
    #05b1f4,
    #34c0f8,
    #ff9e28,
    #fcc245
  ); 
  --icons-border:solid 1px rgba(105, 104, 104, 0.5);
    --nav-border: solid 1px #34c1f871;
  --btn-bg-hover: rgba(3, 15, 66, 0.06);
  --transition-time: 360ms;
  --transition-ease: cubic-bezier(.2,.9,.2,1); 
  --nav-toggle-icons: var(--python-blue);
  --header-scroll: #060c10;
  --header-scroll-border: 1px solid rgba(86, 230, 255, 0.30);
  --header-scroll-box-shadow:0 6px 24px rgba(32, 32, 32, 0.45);
}

:root[data-theme="noir"] {
    --python-blue: black;
  --python-yellow: rgb(216,216,216);
    --python-gradient-text: linear-gradient(
    90deg,
    rgb(255, 255, 255),
    whitesmoke,
    rgb(230, 230, 230),
    rgb(217, 217, 217)
  );
  --nav-border: solid 1px rgba(245, 245, 245, 0.50);
  --nav-toggle-icons: rgb(216, 216, 216);
  --header-scroll: black;
  --header-scroll-border: 1px solid rgba(158, 158, 158, 0.3);
  --header-scroll-box-shadow:0 6px 24px rgba(124, 124, 124, 0.10);
}

:root[data-theme="ice"] {
  --python-blue: #171717;
  --python-yellow: rgb(51, 50, 50);
    --python-gradient-text: linear-gradient(
    90deg,
    rgb(17, 17, 17),
    rgb(31, 31, 31),
    #242424,
    #2b2b2b
  ); 
  --nav-border: solid 1px rgb(30, 30, 30);
  --nav-toggle-icons: rgb(30,30,30);
  --header-scroll: rgb(231, 245, 255);
  --header-scroll-border: 1px solid rgba(30, 30, 30, 0.50);
  --header-scroll-box-shadow:0 6px 24px rgba(124, 124, 124, 0.10);
}

:root[data-theme="blood"] {
  --nav-border: solid 1px #a43636;
  --nav-toggle-icons: var(--python-yellow);
  --header-scroll: var(--bg-primary);
  --header-scroll-border: 1px solid rgba(30, 30, 30, 0.50);
  --header-scroll-box-shadow:0 6px 24px rgba(124, 124, 124, 0.10);
}

:root[data-theme="neon"] {
  --nav-border: solid 1px rgb(181, 41, 209);
  --nav-toggle-icons: rgb(210, 27, 219);
  --header-scroll: var(--bg-primary);
}

:root[data-theme="ocean"] {
  --nav-border: solid 1px rgb(4, 90, 143) !important;
  --nav-toggle-icons: var(--python-yellow);
  --header-scroll: var(--bg-primary);
}

:root[data-theme="fire"] {
  --nav-border: solid 1px rgb(143, 32, 4);
  --nav-toggle-icons: var(--python-yellow);
  --header-scroll: var(--bg-primary);
  --header-scroll-border: 1px solid rgba(255, 170, 86, 0.3);
}

:root[data-theme="forest"] {
  --nav-border: solid 1px rgb(0, 90, 52);
  --nav-toggle-icons: var(--python-yellow);
  --header-scroll: var(--bg-primary);
  --header-scroll-border: 1px solid rgba(86, 255, 106, 0.3);
}

:root[data-theme="blood"] .themes {
  box-shadow: 0px 2px 2px 0px rgba(75, 75, 75, 0.1);
}


:root[data-theme='ice'] .themes {
  background-color: rgb(207, 232, 250);
}

:root[data-theme='noir'] .language-form {
  border: 1px solid transparent;
}


h1 {
  font-family: 'Montserrat', sans-serif;
  font-size: 2.2rem;
  font-weight: 600;
  text-align: center;
}

#header-top{
  z-index: 999;
  display:flex;
  align-items:center;
  justify-content: center;
  gap: 1.5rem;
  position: fixed; 
  padding: 2rem;
  max-width: 1400px;
  width: 100%;
  top: 0;
  left: 0;
  right: 0;
  height: auto;
  transition: background-color 260ms ease, backdrop-filter 260ms ease, box-shadow 260ms ease, border-color 260ms ease;
  backdrop-filter: none;
}

#header-top.is-stuck, #user-manager.is-stuck {
  background-color: var(--header-scroll);
  backdrop-filter: blur(10px);
  box-shadow: var(--header-scroll-box-shadow);
  border-bottom: var(--header-scroll-border);
}

#header-side{
  display: none;
}

#header-top > * { pointer-events: auto; }

#menu-burguer {
  order: 1;
  pointer-events: auto;
}

.user-manager-desktop {
  display: none;
  align-items: center;
  gap: 1.5rem;
  width: auto;
  padding: 1rem;
  justify-content: center;
  z-index: 9999;     
  align-items:center;
  position: fixed; 
  max-width: 900px;
  width: 100%;
  top: 0;
  left: 0;
  right: 0;
  pointer-events: auto;
  height: auto;
  transition: background-color 260ms ease, backdrop-filter 260ms ease, box-shadow 260ms ease, border-color 260ms ease;
  backdrop-filter: none;
  margin: 0 auto;
  border-bottom-left-radius: 2rem;
  border-bottom-right-radius: 2rem;

}

.user-manager-desktop .a-user {
  font-size: 2rem;
}

.user-manager {
  order: 2;
  z-index: 999;
}

#menu-theme {
  order: 3;
}

#menu-burguer,
#menu-theme{
  cursor: pointer;
  font-size: 1.6rem;
  color: var(--nav-toggle-icons);
  transition: 
    background-color var(--transition-time) var(--transition-ease),
    transform var(--transition-time) var(--transition-ease),
    box-shadow var(--transition-time) var(--transition-ease),
    border-color var(--transition-time) var(--transition-ease);
  transform: translateZ(0);  
  will-change: transform, background-color;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 1rem;
  max-width: 600px;
  width: 100%;
  z-index: 9999;
  transition: opacity 180ms ease, transform 180ms ease;
  border: var(--nav-border);
  background-color: var(--bg-primary);
  border-radius: 0.5rem;
  margin: 0 auto;
}

.logo-and-name {
  display: none;
}

#logo {
  display: none;
}

.user-manager {
  display: flex;
  align-items: center;
  gap: 1rem;
  max-width: 400px;
  width: auto;
  padding: 0.5rem;
  margin: 0 auto;
  flex-wrap: wrap;
  justify-content: center;
}

.a-user {
  font-size: clamp(1.4rem, 2.8vw, 1.4rem);
  display: flex;
  align-items: center;
  gap: 0.8rem;
  text-decoration: none;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 0.5rem;
  border: 1px solid transparent;
  overflow: visible;
  background: transparent;
  transition: 
    background-color var(--transition-time) var(--transition-ease),
    transform var(--transition-time) var(--transition-ease),
    box-shadow var(--transition-time) var(--transition-ease),
    border-color var(--transition-time) var(--transition-ease);
  transform: translateZ(0);  
  will-change: transform, background-color;
}

.a-user:hover,
.a-user:focus,
#menu-burguer:hover,
#menu-burguer:focus,
#menu-theme:hover,
#menu-theme:focus {
  background-color: var(--btn-bg-hover);
  transform: translateY(-6px);
  border-color: var(--python-yellow);
  box-shadow: 0 10px 30px rgba(2,6,23,0.6), 0 0 14px rgba(0,153,255,0.05);
}

.username-large {
  font-size: 1.2rem;
}

.username {
  font-size: 1.4rem;
}

.user-manager.large-username {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 1rem;
}

.a-users {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 0.8rem;
  margin: 0 auto;
}

.a-nav {
  text-decoration: none;
  cursor: pointer;
  font-size: 1.2rem;
  border-radius: 0.4rem;
    border-radius: 0.5rem;
  border: 1px solid transparent;
  overflow: visible;
  background: transparent;
  transition: 
    background-color var(--transition-time) var(--transition-ease),
    transform var(--transition-time) var(--transition-ease),
    box-shadow var(--transition-time) var(--transition-ease),
    border-color var(--transition-time) var(--transition-ease);
  transform: translateZ(0);  
  will-change: transform, background-color;
  padding: 0.5rem;

}

.a-nav:hover,
.a-nav:focus{
  background-color: var(--btn-bg-hover);
  transform: translateX(6px);
  border-color: var(--python-yellow);
  box-shadow: 0 10px 30px rgba(2,6,23,0.6), 0 0 14px rgba(0,153,255,0.05);
}
/* foco por teclado — acessibilidade */
.a-user:focus, .a-nav:focus {
  outline: 3px solid rgba(0, 174, 255, 0.12);
  outline-offset: 4px;
}

.a-user i, .a-nav i {
  color: var(--python-yellow);
}

@media (prefers-reduced-motion: reduce) {
  .a-user, .a-nav {
    transition: none;
    transform: none;
  }
}

.language-form {
  max-width: 100px;
  width: 100%;
  background-color: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border-radius: 0.4rem;
  border: var(--nav-border);
}

.language-form button {
  outline: none;
  border: none;
  background-color: transparent;
  padding: 1rem;
  cursor: pointer;
}

.language-form img {
  width: 2.2rem;
  height: 2.2rem;
  transition: transform 0.3s ease;
}

.language-form button:hover,
.language-form img:hover{
  transform: scale(1.05);
}

.gradient-text {
  background-image: var(--python-gradient-text);
  -webkit-background-clip: text;
  background-clip: text; /* para navegadores que suportam sem prefixo */
  -webkit-text-fill-color: transparent;
  color: transparent; /* fallback */
}

.themes {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  display: none;
  flex-direction: column;
  gap: 1rem;
  height: auto;
  max-width: 150px;
  width: auto;
  z-index: 9999;
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
  border: var(--nav-border);
  background-color: var(--bg-primary);
  border-radius: 2rem;
  padding: 1rem;
  box-shadow: 0px 2px 2px 0px rgba(248, 248, 248, 0.1);
}

.theme-toggle {
  position: relative;
  order: 3;
  z-index: 9999;
}

.theme-toggle button {
  background: transparent;
  border: none;
  padding: 0.2rem;
  cursor: pointer;
  display: inline-flex;
  -webkit-appearance: none;
  appearance: none;
}

.themes.open {
display: flex;
opacity: 1;
transform: translateY(0);
pointer-events: auto;
}

.circle { 
  cursor: pointer;
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 50%;
  border: 1px solid rgb(61, 61, 61);
  transition: 
    background-color var(--transition-time) var(--transition-ease),
    transform var(--transition-time) var(--transition-ease),
   box-shadow var(--transition-time) var(--transition-ease),
    border-color var(--transition-time) var(--transition-ease);
  transform: translateZ(0);  
  will-change: transform, background-color;
}

.circle:hover, .circle:focus {
  border-color: var(--python-yellow);
  transform: translateX(-6px);
  box-shadow: 0 10px 30px rgba(2,6,23,0.6), 0 0 14px rgba(0,153,255,0.05);
  outline: 1px solid rgba(0,153,255,0.20);
  outline-offset: 2px;
}

@media(min-width:480px) {
  #menu-burguer,
  #menu-theme{
    font-size: 2rem;
  }

  .a-user, .username {
  font-size: 1.6rem;
  }

  .a-nav {
  font-size: 1.4rem;
  }
  .language-form img {
    width: 2.5rem;
    height: 2.5rem;
  }
}

@media(min-width: 600px) {
  .a-nav {
      font-size: 1.8rem;
  }
}

@media(min-width:768px) {

.circle:hover, .circle:focus {
  transform: translateY(-6px);
}
  #header-top {
    display: flex;
    align-items: center;
    width: 100%;
    gap: 1rem;
    padding: 1.5rem 2rem;
  }

  .theme-toggle { order: 2; display: flex; align-items: center; gap: .5rem; }
  .user-manager, .user-manager.large-username { order: 3;}

  #menu-burguer { 
    order: 1;
    font-size: 2.4rem; 
  }

  #menu-theme {
    display: none;
  }

  .a-nav {
      font-size: 1.8rem;
    }

  .theme-toggle {
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .themes  {
    position: static;
    opacity:1 !important;
    display: flex !important;
    align-items: center; 
    flex-direction: row; 
    transform: none !important;
    pointer-events: auto !important;
    max-width: none !important;
    width: auto !important;
    z-index: 9999;
    margin: 0;
  }
  .user-manager {
     max-width: 400px;
      justify-content: flex-start; 
    }

    .language-form {
      max-width: 200px;
    }

  .language-form img {
    width: 2.8rem;
    height: 2.8rem;
  }

  .circle { 
  width: 2.2rem;
  height: 2.2rem;
  }

  .circle:hover, .circle:focus {
    border-color: var(--python-yellow);
    transform: translateY(-6px);
    box-shadow: 0 10px 30px rgba(2,6,23,0.6), 0 0 14px rgba(0,153,255,0.05);
  }
}

@media(min-width:1024px){

  .user-manager-desktop {
    display: flex;
  }

  .user-manager {
    display: none;
  }
    #header-top {
    display: none;
  }

  #menu-burguer, #menu-theme {
    display: none;
  }


  .logo-and-name {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    width: 100%;
  }

  #logo {
    width: 12rem;
    height: auto;
    display: block;
    cursor: pointer;
  }

  #header-side {
    position: sticky;
    top: 0;
    left: 0;
    height: calc(100svh);
    width: 300px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1.6rem;
    padding: 2rem 1rem;
    z-index: 999;
  }

  .navbar-desktop {
    display: flex ;
    flex-direction: column;
    align-items: center;
    gap: 1.2rem;
    width: 100%;
    height: 100%;
    padding: 0;
    margin-top: 0.8rem;
  }

  .navbar-desktop span {
    font-size: 1.8rem;
  }

  .a-nav-desktop {
    font-size: 2rem;
    border-radius: 0.4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem;
    transition: 
    background-color var(--transition-time) var(--transition-ease),
    box-shadow var(--transition-time) var(--transition-ease),
    border-color var(--transition-time) var(--transition-ease),
    transform var(--transition-time) var(--transition-ease);
    will-change:background-color;
    border: 1px solid transparent;
  }

  .a-nav-desktop:hover,
  .a-nav-desktop:focus{
    background-color: var(--btn-bg-hover);
    transform: translateX(6px);
    border-color: var(--python-yellow);
    box-shadow: 0 10px 30px rgba(2,6,23,0.6), 0 0 14px rgba(0,153,255,0.05);
  }
  /* foco por teclado — acessibilidade */
  .a-nav-desktop:focus {
    outline: 3px solid rgba(0, 174, 255, 0.12);
    outline-offset: 4px;
  }

  .a-nav-desktop i {
    cursor: pointer;
    color: var(--python-yellow);
  }

  .language-form img {
  width: 4rem;
  height: 4rem;
  }
}

@media (min-width:1400px) {

  .user-manager-desktop {
    max-width: 800px;
  }

  #logo {
    width: 15rem;
  }

  .circle {
    width: 3rem;
    height: 3rem;
  }

  h1 {
    font-size: 2.8rem;
  }

  .logo-and-name span {
    font-size: 2rem;
  }

  .a-nav-desktop {
    font-size: 2.2rem;
  }
}

@media (max-height: 600px) {
  #header-side .navbar-desktop {
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    }
}