:root {
  /* ----------------------- */
  /* PRIMARY - ELECTRIC INDIGO */
  /* ----------------------- */
  --primary: #4C1D95;          /* Deep royal indigo */
  --primary-hover: #7C3AED;    /* Vivid violet for hover */
  --primary-active: #2E1065;   /* Almost-black indigo for pressed */
  --primary-focus: #C4B5FD;    /* Soft lavender focus outline */
  --primary-glow: #8B5CF6;     /* Used for glow / gradient accents */

  /* ----------------------- */
  /* SECONDARY - SUNSET CORAL */
  /* ----------------------- */
  --secondary: #F43F5E;        /* Bold coral-rose */
  --secondary-hover: #FB7185;  /* Lighter coral for hover */
  --secondary-active: #BE123C; /* Darker rose for pressed */
  --secondary-focus: #FECDD3;  /* Soft blush focus outline */

  /* ----------------------- */
  /* ACCENT - LIQUID GOLD */
  /* ----------------------- */
  --accent: #FBBF24;
  --accent-soft: #FDE68A;

  /* ----------------------- */
  /* NEUTRAL / GRAY */
  /* ----------------------- */
  --neutral-text: #1A1523;        /* Deep ink violet-black */
  --neutral-muted: #6D6580;       /* Muted plum-grey */
  --neutral-bg: #F7F5FB;          /* Whisper-lavender background */
  --neutral-card: #FFFFFF;        /* Card / section background */
  --neutral-border: #E4DEF2;      /* Soft violet-tinted border */
  --neutral-disabled: #DAD3E8;    /* Disabled buttons / inputs */

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #4C1D95 0%, #7C3AED 50%, #F43F5E 100%);
  --gradient-hero: linear-gradient(120deg, #2E1065 0%, #4C1D95 40%, #7C3AED 75%, #F43F5E 100%);
  --gradient-card: linear-gradient(160deg, #FFFFFF 0%, #F7F5FB 100%);

  --page-padding: 1.6rem;
  --box-padding: 0.8rem;
  --section-margin: 1.6rem;
  --items-gap: 1rem;

  --font-size-h1: 3.2rem;
  --font-size-h2: 2.8rem;
  --font-size-h3: 2.4rem;
  --font-size-h4: 2rem;
  --font-size-p: 1.6rem;
  --font-size-small: 1.4rem;

  /* Elevation system */
  --shadow-soft: 0 0.4rem 1.2rem rgba(76, 29, 149, 0.10);
  --shadow-glow: 0 0.8rem 2.4rem rgba(124, 58, 237, 0.25);
  --shadow-lift: 0 1.2rem 3.2rem rgba(76, 29, 149, 0.18);
  --radius-lg: 1.6rem;
  --radius-md: 1rem;
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (min-width: 768px) {
  :root {
    --page-padding: 2.4rem;  /* slightly larger padding */
    --box-padding: 1.6rem;
    --section-margin: 2.4rem;
    --items-gap: 1.4rem;

    --font-size-h1: 4rem;
    --font-size-h2: 3.6rem;
    --font-size-h3: 3.2rem;
    --font-size-h4: 2.4rem;
    --font-size-p: 1.8rem;
    --font-size-small: 1.6rem;
  }
}

/* Desktop */
@media (min-width: 1024px) {
  :root {
    --page-padding: 3.2rem;       /* more space on large screens */
    --box-padding: 2.4rem;
    --section-margin: 3.2rem;
    --items-gap: 1.6rem;

    --font-size-h1: 4.8rem;
    --font-size-h2: 4.2rem;
    --font-size-h3: 3.6rem;
    --font-size-h4: 3rem;
    --font-size-p: 2rem;
    --font-size-small: 1.8rem;
  }
}

/*@media (prefers-color-scheme: dark) {
  :root {
    /* Backgrounds
    --neutral-bg: #121212;
--neutral-card: #1E1E1E;
    --neutral-border: #2C2C2C;
 */
    /* Text
    --neutral-text: #F5F5F5;
    --neutral-muted: #A0A0A0;
    */

    /* Primary / Secondary
    --primary: #3B5DC9;
    --primary-hover: #5A7DEB;
    --primary-active: #162F6F;
    --primary-focus: #93C5FD;

    --secondary: #22C55E;
    --secondary-hover: #4ADE80;
    --secondary-active: #15803D;
    --secondary-focus: #A7F3D0;
  }
} */

* {
  box-sizing: border-box;
}

html{
  font-size: 62.5%;
  scroll-behavior: smooth;
}
body{
  font-size: 1.6rem;
  background-color: var(--neutral-bg);
  background-image:
    radial-gradient(circle at 10% 0%, rgba(124, 58, 237, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 90% 20%, rgba(244, 63, 94, 0.06) 0%, transparent 40%);
  color: var(--neutral-text);
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
h1{
  background: var(--gradient-primary);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--primary);
  font-size: var(--font-size-h1, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
h2{
  color: var(--primary);
  font-size: var(--font-size-h2, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}
h3{
  color: var(--primary-active);
  font-size: var(--font-size-h3, 2.4rem);
  font-weight: 700;
}
h4{
  font-size: var(--font-size-h4, 2rem);
  font-weight: 600;
}
#universities h3 {
   color: var(--primary);
}
.university-image, .logo-img{
  display: block;
  width: 100%;
  height: 12rem;
  background: var(--gradient-card);
  border: 1px dashed var(--neutral-border);
  border-radius: var(--radius-md);
  object-fit: cover;
}
.logo-img{
  width: 4rem;
  height: 4rem;
  min-height: 0;
  border-radius: 50%;
}
p, li, dt,dd,blockquote,a{
  font-size: var(--font-size-p, 1.6rem);
  color: var(--neutral-text);
}
a{
  color: var(--primary);
  transition: var(--transition-smooth);
}
::selection{
  background-color: var(--primary-glow);
  color: #fff;
}
header{
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 100;
  }

header nav{
  display: flex;
  justify-content: space-between;
  align-items:center;
  height: 5.6rem;
  background-color: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(1.2rem);
  -webkit-backdrop-filter: blur(1.2rem);
  border-bottom: 1px solid var(--neutral-border);
  box-shadow: 0 0.2rem 1.2rem rgba(76, 29, 149, 0.06);
  padding: 0 var(--page-padding);
  }

nav ul{
  display:flex;
  align-items: center;
  gap: var(--items-gap, 1rem);
  list-style: none;

}
header nav .menu{
  display: inline-block;
  text-decoration: none;
  border: 1.5px solid var(--primary);
  padding: 0.6rem 1.2rem;
  color: var(--primary);
  background-color: transparent;
  font-weight: 600;
  border-radius: 999px;
  transition: var(--transition-smooth);
}
header nav a:hover{
  color: #fff;
  background: var(--gradient-primary);
  border: 1.5px solid transparent;
  box-shadow: var(--shadow-glow);
  transform: translateY(-0.15rem);
}

header nav a:active{
  color: #fff;
  background-color: var(--primary-active);
  border: 1.5px solid var(--primary-active);
  transform: translateY(0);
}

header nav a:focus{
  color: var(--primary);
  background-color: var(--primary-focus);
  border: 1.5px solid var(--primary);
  outline: none;
}
header nav .login{
  display: inline-block;
  text-decoration: none;
  border: none;
  padding: 0.7rem 1.6rem;
  color: #fff;
  background: var(--gradient-primary);
  font-weight: 700;
  border-radius: 999px;
  box-shadow: var(--shadow-soft);
}
main{
  padding-top: 5.6rem;
}
.characteristics{
  border: 1px solid var(--neutral-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lift);
  background: var(--gradient-card);
  margin: var(--section-margin, 1.6rem);
  padding: var(--box-padding, 0.8rem);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}
.characteristics::before{
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0.5rem;
  background: var(--gradient-primary);
}
.characteristics:hover{
  transform: translateY(-0.4rem);
  box-shadow: 0 1.6rem 4rem rgba(76, 29, 149, 0.24);
}
.university-flexbox{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(26rem, 1fr));
  gap: var(--items-gap, 1rem);
}

.university-flexbox-container{
  display: flex;
  flex-direction: column;
  border: 1px solid var(--neutral-border);
  box-shadow: var(--shadow-soft);
  background-color: var(--neutral-card);
  border-radius: var(--radius-lg);
  height: 100%;
  padding: var(--box-padding, 0.8rem);
  overflow: hidden;
  transition: var(--transition-smooth);
}
.university-flexbox-container h3{
  margin: 1rem 0 0.4rem;
}
.university-flexbox-container p{
  flex-grow: 1;
}
.university-flexbox-container button{
  align-self: flex-start;
  margin-top: 0.8rem;
}
.university-flexbox-container:hover{
  box-shadow: var(--shadow-glow);
  border-color: var(--primary-glow);
  transform: translateY(-0.3rem);
}
table{
  width: 95%;
  margin: var(--section-margin, 1.6rem) auto;
  padding: 1rem;
  border: 1px solid var(--neutral-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  background-color: var(--neutral-card);
  border-collapse: separate;
  border-spacing: 0;
  overflow: hidden;
}
table th, table td{
  text-align: left;
  padding: 0.8rem 1rem;
}
table thead th{
  background: var(--gradient-primary);
  color: #fff;
  font-weight: 700;
}
.table-caption{
  font-weight: bold;
  font-size: var(--font-size-p, 1.6rem);
  color: var(--primary);
  margin: 1rem auto;
}
table tr{
  font-size: var(--font-size-p, 1.6rem);
  padding: 1.2rem;
  transition: var(--transition-smooth);
}
tbody tr:hover td{
  background-color: var(--primary-focus);
}
tbody tr:nth-of-type(2n+1) td{
  background-color: var(--neutral-bg);
}
.grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.6rem;
}

/* Buttons — subtle Academy-Award shimmer */
button, .btn{
  font-family: inherit;
  font-weight: 700;
  border: none;
  border-radius: 999px;
  padding: 0.8rem 2rem;
  background: var(--gradient-primary);
  color: #fff;
  cursor: pointer;
  box-shadow: var(--shadow-soft);
  transition: var(--transition-smooth);
}
button:hover, .btn:hover{
  box-shadow: var(--shadow-glow);
  transform: translateY(-0.15rem) scale(1.02);
}
button:active, .btn:active{
  transform: translateY(0) scale(0.98);
}

@media screen and (min-width: 768px){
  h1{
  font-size: var(--font-size-h1, 4rem);
}
h2{
  font-size: var(--font-size-h2, 3.2rem);
}
h3{
   font-size: var(--font-size-h3, 2.6rem);
}
h4{
  font-size: var(--font-size-h4, 2.2rem);
}

p, li, dt,dd,blockquote,a{
  font-size: var(--font-size-p, 1.7rem);
}

nav ul{
  gap: var(--items-gap, 1.4rem);
}
.characteristics{
  margin: var(--section-margin, 2.4rem);
  padding: var(--box-padding, 1.6rem)
}
.university-flexbox{
  gap: var(--items-gap, 1.4rem);
}

.university-flexbox-container{
  padding: var(--box-padding, 1.6rem)
}
table{
  margin: var(--section-margin, 2.4rem) auto;
  padding: var(--box-padding, 1.6rem);
}
.table-caption{
  font-size: var(--font-size-p, 1.7rem);
  margin: var(--box-padding, 1.6rem) auto;
}
table tr{
  font-size: var(--font-size-p, 1.7rem);
  }
  .grid{
  display: grid;
  grid-template-columns: repeat(2,1fr);
  gap: 1.6rem;
  height: 100vh;
}
  .item-1, .item-2{
    overflow-y: auto;
    height: 100vh;
  }
}

@media screen and (min-width: 1024px){
  h1{
  font-size: var(--font-size-h1, 4.8rem);
}
h2{
  font-size: var(--font-size-h2, 3.6rem);
}
h3{
   font-size: var(--font-size-h3, 2.8rem);
}
h4{
  font-size: var(--font-size-h4, 2.4rem);
}

p, li, dt,dd,blockquote,a{
  font-size: var(--font-size-p, 1.8rem);
}

nav ul{
  gap: var(--items-gap, 1.6rem);
}
.characteristics{
  margin: var(--section-margin, 3.2rem);
  padding: var(--box-padding, 2.4rem)
}
.university-flexbox{
  gap: var(--items-gap, 1.6rem);
}

.university-flexbox-container{
  padding: var(--box-padding, 2.4rem)
}
table{
  margin: var(--section-margin, 3.2rem) auto;
  padding: var(--box-padding, 2.4rem);
}
.table-caption{
  font-size: var(--font-size-p, 1.8rem);
  margin: var(--box-padding, 2.4rem) auto;
}
table tr{
  font-size: var(--font-size-p, 1.8rem);
  }
  .grid{
  display: grid;
  grid-template-columns: repeat(2,1fr);
  gap: 2.4rem;
  height: 100vh;
}
  .item-1, .item-2{
    overflow-y: auto;
    height: 100vh;
  }
}

/* ============================= */
/* PAGE LAYOUT (multi-page site) */
/* ============================= */
.page-content{
  max-width: 1400px;
  margin: 0 auto;
}
.logo-link{
  display: inline-flex;
  align-items: center;
}

/* ============================= */
/* NAV: active link + dark toggle */
/* ============================= */
header nav .menu[aria-current="page"]{
  color: #fff;
  background: var(--gradient-primary);
  border: 1.5px solid transparent;
  box-shadow: var(--shadow-soft);
}
.dark-toggle{
  display: inline-block;
  font-family: inherit;
  font-size: var(--font-size-small, 1.4rem);
  border: 1.5px solid var(--primary);
  padding: 0.6rem 1.2rem;
  color: var(--primary);
  background-color: transparent;
  font-weight: 600;
  border-radius: 999px;
  cursor: pointer;
  transition: var(--transition-smooth);
}
.dark-toggle:hover{
  color: #fff;
  background: var(--gradient-primary);
  border-color: transparent;
  box-shadow: var(--shadow-glow);
  transform: translateY(-0.15rem);
}
.dark-toggle:focus-visible{
  outline: 2px solid var(--primary-glow);
  outline-offset: 2px;
}

/* ============================= */
/* HOME PAGE: quick links         */
/* ============================= */
.quick-links{
  margin: var(--section-margin, 1.6rem) 0;
}
.quick-links-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--items-gap, 1rem);
}
.quick-link-card{
  display: block;
  text-decoration: none;
  color: var(--neutral-text);
  background: var(--gradient-card);
  border: 1px solid var(--neutral-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: var(--box-padding, 0.8rem);
  transition: var(--transition-smooth);
}
.quick-link-card:hover{
  transform: translateY(-0.4rem);
  box-shadow: var(--shadow-glow);
  border-color: var(--primary-glow);
}
.quick-link-card h3{
  color: var(--primary);
  margin-top: 0;
}
.quick-link-cta{
  display: inline-block;
  margin-top: 0.8rem;
  font-weight: 700;
  color: var(--secondary);
}

@media screen and (min-width: 768px){
  .quick-links-grid{
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============================= */
/* DARK MODE THEME               */
/* ============================= */
html[data-theme="dark"]{
  --primary: #A78BFA;
  --primary-hover: #C4B5FD;
  --primary-active: #7C3AED;
  --primary-focus: #382A5C;
  --primary-glow: #A78BFA;

  --secondary: #FB7185;
  --secondary-hover: #FDA4AF;
  --secondary-active: #E11D48;
  --secondary-focus: #4C1D28;

  --accent: #FBBF24;
  --accent-soft: #78350F;

  --neutral-text: #F1EDFB;
  --neutral-muted: #B4ABC9;
  --neutral-bg: #120E1C;
  --neutral-card: #1E1830;
  --neutral-border: #34294D;
  --neutral-disabled: #4B3F66;

  --gradient-primary: linear-gradient(135deg, #7C3AED 0%, #A78BFA 50%, #FB7185 100%);
  --gradient-hero: linear-gradient(120deg, #2E1065 0%, #7C3AED 40%, #A78BFA 75%, #FB7185 100%);
  --gradient-card: linear-gradient(160deg, #1E1830 0%, #120E1C 100%);

  --shadow-soft: 0 0.4rem 1.2rem rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0.8rem 2.4rem rgba(167, 139, 250, 0.35);
  --shadow-lift: 0 1.2rem 3.2rem rgba(0, 0, 0, 0.55);
}
html[data-theme="dark"] body{
  background-image:
    radial-gradient(circle at 10% 0%, rgba(167, 139, 250, 0.14) 0%, transparent 45%),
    radial-gradient(circle at 90% 20%, rgba(251, 113, 133, 0.12) 0%, transparent 40%);
}
html[data-theme="dark"] header nav{
  background-color: rgba(18, 14, 28, 0.75);
}

body, header nav, .characteristics, .university-flexbox-container,
table, .quick-link-card{
  transition: background-color 0.3s ease, color 0.3s ease,
              border-color 0.3s ease, box-shadow 0.3s ease;
}

/* ============================= */
/* FOOTER                        */
/* ============================= */
.site-footer{
  margin-top: var(--section-margin, 1.6rem);
  padding: var(--box-padding, 0.8rem) var(--page-padding, 1.6rem);
  border-top: 1px solid var(--neutral-border);
  background: var(--gradient-card);
}
.footer-content{
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
}
.footer-credit{
  color: var(--neutral-muted);
  font-size: var(--font-size-small, 1.4rem);
  margin: 0;
}
.footer-credit strong{
  background: var(--gradient-primary);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.footer-socials{
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.8rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-socials a{
  display: inline-block;
  text-decoration: none;
  font-size: var(--font-size-small, 1.4rem);
  font-weight: 600;
  color: var(--primary);
  border: 1.5px solid var(--primary);
  padding: 0.5rem 1.2rem;
  border-radius: 999px;
  transition: var(--transition-smooth);
}
.footer-socials a:hover,
.footer-socials a:focus-visible{
  color: #fff;
  background: var(--gradient-primary);
  border-color: transparent;
  box-shadow: var(--shadow-glow);
  transform: translateY(-0.15rem);
  outline: none;
}

@media screen and (min-width: 768px){
  .footer-content{
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* ============================= */
/* MOBILE NAV (hamburger)        */
/* ============================= */
.nav-toggle{
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 2.6rem;
  height: 2rem;
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
  z-index: 20;
}
.nav-toggle span{
  display: block;
  height: 0.3rem;
  width: 100%;
  background-color: var(--primary);
  border-radius: 0.2rem;
  transition: var(--transition-smooth);
}
.nav-toggle.open span:nth-child(1){
  transform: translateY(0.85rem) rotate(45deg);
}
.nav-toggle.open span:nth-child(2){
  opacity: 0;
}
.nav-toggle.open span:nth-child(3){
  transform: translateY(-0.85rem) rotate(-45deg);
}

@media screen and (max-width: 767.98px){
  .nav-toggle{
    display: flex;
  }
  header nav{
    flex-wrap: wrap;
    height: auto;
    min-height: 5.6rem;
  }
  header nav ul{
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: 0.8rem;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
    padding: 0 var(--page-padding);
    background-color: var(--neutral-card);
    border-top: 1px solid var(--neutral-border);
    box-shadow: var(--shadow-lift);
    transition: max-height 0.35s ease, opacity 0.25s ease, padding 0.35s ease;
  }
  header nav ul.nav-open{
    max-height: 50rem;
    opacity: 1;
    pointer-events: auto;
    padding: 1.2rem var(--page-padding);
  }
  header nav ul li{
    width: 100%;
  }
  header nav ul li a,
  header nav ul li .dark-toggle{
    display: block;
    width: 100%;
    text-align: center;
  }
}