/* fonts */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');


* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #4361ee;
  --secondary-color: #3f37c9;
  --accent-color: #4895ef;
  --background-light: #f8f9fa;
  --text-primary: #2b2d42;
  --text-secondary: #6c757d;
  --transition-speed: 0.3s;
  --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --primary-rgb: 67, 97, 238;
  --accent-rgb: 72, 149, 239;
  --nav-bg: #ffffff;
  --card-bg: #ffffff;
  --card-bg-secondary: #f8f9fa;
  --border-color: rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
  --background-light: #1a1b1e;
  --text-primary: #f8f9fa;
  --text-secondary: #ced4da;
  --box-shadow: 0 4px 6px rgba(255, 255, 255, 0.1);
  --nav-bg: #2d2d2d;
  --card-bg: #2d2d2d;
  --card-bg-secondary: #363636;
  --border-color: rgba(255, 255, 255, 0.1);
}

#toggle-dark {
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 1.2rem;
  padding: 0.5rem;
  transition: transform var(--transition-speed) ease;
}

#toggle-dark:hover {
  opacity: 0.8;
}

#toggle-dark.rotate {
  animation: rotate 0.5s ease-in-out;
}

@keyframes rotate {
  from {
    transform: rotate(0);
  }
  to {
    transform: rotate(360deg);
  }
}


html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  background-color: var(--background-light);
  color: var(--text-primary);
  overflow-x: hidden;
  font-family: 'Poppins', sans-serif;
  font-size: 16px;
  line-height: 1.5;
  transition: all var(--transition-speed) ease;
}


.classes-container {
    min-height: 100vh;
    padding: 6rem 2rem 4rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: linear-gradient(
        135deg,
        rgba(67, 97, 238, 0.05),
        rgba(72, 149, 239, 0.05)
    );
}


.titles-container {
    display: flex;
    gap: 50px; 
    justify-content: center; 
    width: 75%;
}


.text-title {
    font-family: 'Poppins', sans-serif;
    font-size: 3.5rem;
    font-weight: 700;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 2px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
    transition: all var(--transition-speed) ease;
    flex: 1;
    position: relative;
    padding: 1rem;
}

.text-title:hover {
    transform: scale(1.1); 
}

.buttons-container {
    display: flex;
    justify-content: space-between; 
    gap: 40px; 
    width: 100%;
    max-width: 1000px; 
}


.vertical-buttons {
    display: flex;
    flex-direction: column; 
    gap: 15px;
    justify-content: center;
    align-items: center;
    flex: 1; 
}


.vertical-buttons button {
    width: 300px;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    font-weight: 500;
    border-radius: 12px;
    background: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    backdrop-filter: blur(10px);
}

.vertical-buttons button:hover {
    transform: translateY(-2px);
    background: var(--secondary-color);
    box-shadow: 0 6px 12px rgba(67, 97, 238, 0.3);
}

.vertical-buttons button:active {
    transform: translateY(0);
}

.vertical-buttons button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        120deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    transition: all 0.6s ease;
}

.vertical-buttons button:hover::before {
    left: 100%;
}

.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--box-shadow);
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    text-decoration: none !important;
}

.logo span {
    text-decoration: none !important;
    color: inherit !important;
}

.logo i {
    font-size: 2rem;
}

#toggle-dark {
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
    border-radius: 50%;
    transition: all var(--transition-speed) ease;
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

#toggle-dark:hover {
    background-color: rgba(var(--primary-rgb), 0.1);
}

#toggle-dark i {
    font-size: 1.2rem;
    transition: transform var(--transition-speed) ease;
}

#toggle-dark:active i {
    transform: scale(0.9);
}
/*
.hero-section {
    min-height: 100vh;
    padding: 6rem 2rem 2rem;
    display: flex;
    align-items: center;
    background: linear-gradient(
        45deg,
        rgba(67, 97, 238, 0.1),
        rgba(72, 149, 239, 0.1)
    );
}
*/
.container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.main-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    padding: 2rem;
}

.card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 2rem;
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition-speed) ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--box-shadow);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(67, 97, 238, 0.2);
    border-color: var(--primary-color);
}

.card-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.card-content i {
    font-size: 3rem;
    color: var(--primary-color);
}

.card-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.card-content p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.subject-header {
    text-align: center;
    margin-bottom: 4rem;
    animation: fadeIn 0.6s ease-out forwards;
}

.subject-description {
    color: var(--text-secondary);
    font-size: 1.2rem;
    margin-top: 1rem;
}

.grade-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    animation: fadeIn 0.8s ease-out forwards;
}

.grade-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 2rem;
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition-speed) ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--box-shadow);
    position: relative;
    overflow: hidden;
}

.grade-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg,
        rgba(var(--primary-rgb), 0.1),
        rgba(var(--accent-rgb), 0.1)
    );
    opacity: 0;
    transition: opacity var(--transition-speed) ease;
}

.grade-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.grade-card:hover::before {
    opacity: 1;
}

.grade-content {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    z-index: 1;
    padding: 1rem;
}

.grade-number {
    font-size: 4.5rem;
    font-weight: 700;
    line-height: 1;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 0.5rem;
}

.grade-content h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin: 0;
    text-align: center;
}

.main-footer {
  text-align: center;
  padding: 2rem;
  min-height: 100px;
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
}

/* Dark mode footer fix */
[data-theme="dark"] .main-footer {
  background: rgba(0, 0, 0, 0.2);
  color: var(--text-primary);
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    /*
    .hero-section {
        padding: 5rem 1rem 1rem;
    }
    */
    .feature-item {
        width: 100%;
        justify-content: center;
    }
    .grid-container {
        padding: 1rem;
        grid-template-columns: 1fr;
    }

    .grade-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        padding: 1rem;
    }
    
    .grade-card {
        padding: 1.5rem;
    }
    
    .grade-number {
        font-size: 3rem;
    }
}

[data-theme="dark"] .main-nav {
    background: rgba(26, 27, 30, 0.8);
}

[data-theme="dark"] .card {
    background: rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .grade-card {
    background: rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .grade-card:hover {
    background: rgba(0, 0, 0, 0.3);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
/* Improve Font Awesome performance */
@font-face {
  font-family: 'Font Awesome 6 Free';
  font-style: normal;
  font-weight: 900;
  font-display: swap;
  src: url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/webfonts/fa-solid-900.woff2') format('woff2'),
       url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/webfonts/fa-solid-900.woff') format('woff');
}

@font-face {
  font-family: 'Font Awesome 6 Free';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/webfonts/fa-regular-400.woff2') format('woff2'),
       url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/webfonts/fa-regular-400.woff') format('woff');
}

.email-link {
    color: var(--primary-color);
    text-decoration: underline;  /* always visible */
    font-weight: 600;            /* optional for emphasis */
}
.email-link:hover,
.email-link:focus {
    color: var(--accent-color);
    text-decoration: underline;
    outline: none; /* optional, but consider adding a visible outline for keyboard users */
}
[data-theme="dark"] .email-link {
    color: #6e47ee; /* soft lavender-blue */
}


/*
.hero-section > * {
    animation: fadeIn 0.6s ease-out forwards;
}
*/