/* ===== CSS RESET ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ===== CSS VARIABLES ===== */
:root {
    /* Colors */
    --color-bg: #FAF9F7;
    --color-bg-neutral: #e6e6e6;
    --color-surface: #FFFFFF;
    --color-primary: #301E67;
    --color-node-fill: #D2F0D1;
    --color-text-primary: #03001C;
    --color-text-secondary: #343434;
    --color-text-on-primary: #FFFFFF;
    --color-border: #d9d9d9;

    /* Typography */
    --font-family: 'Nunito', sans-serif;

    /* Spacing */
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 48px;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-full: 50%;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(48, 30, 103, 0.08);
    --shadow-md: 0 4px 12px rgba(48, 30, 103, 0.2);
    --shadow-lg: 0 6px 20px rgba(48, 30, 103, 0.25);

    /* Button States */
    --btn-hover-scale: 1.05;
    --btn-active-scale: 0.98;
    --btn-transition: all 0.2s ease;
}

/* ===== BASE STYLES ===== */
body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== TYPOGRAPHY ===== */
h1 {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text-primary);
}

h2 {
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-text-primary);
}

h3 {
    font-size: 1.125rem;
    font-weight: 600;
    line-height: 1.4;
    color: var(--color-text-primary);
}

p {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

/* ===== LAYOUT ===== */
.site-width {
    padding: 0 var(--spacing-lg);
    margin: 0 auto;
}

main {
    min-height: 100vh;
}

/* ===== UTILITIES ===== */
.hidden {
    display: none;
}

/* ===== HERO SECTION ===== */
.hero {
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.hero h1 {
    margin-bottom: var(--spacing-xl);
}

.challenge-grid {
    position: relative;
    width: 320px;
    height: 320px;
    margin: 0 auto;
}

/* Spin button */
.spin {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    border-radius: var(--radius-full);
    background-color: var(--color-primary);
    color: var(--color-text-on-primary);
    font-size: 1.25rem;
    font-weight: 700;
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: var(--btn-transition);
    z-index: 2;
}

.spin:hover {
    transform: translate(-50%, -50%) scale(var(--btn-hover-scale));
    box-shadow: var(--shadow-lg);
}

.spin:active {
    transform: translate(-50%, -50%) scale(var(--btn-active-scale));
}

/* Challenge nodes */
.challenge-node {
    position: absolute;
    width: 64px;
    height: 64px;
    border-radius: var(--radius-full);
    background-color: var(--color-node-fill);
    border: 1.5px solid var(--color-primary);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s ease;
    z-index: 1;
}

.node-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    transition: transform 0.2s ease;
}

.challenge-node:hover {
    box-shadow: var(--shadow-md);
}

.challenge-node:hover .node-content {
    transform: scale(1.1);
}

.challenge-node.selected {
    background-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.challenge-node.selected .category-icon {
    filter: brightness(0) invert(1);
}

.challenge-node.selected .category-label {
    color: var(--color-text-on-primary);
}

/* Node positioning */
.challenge-node:nth-child(2) {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(0deg) translateY(-128px);
}

.challenge-node:nth-child(3) {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(36deg) translateY(-128px) rotate(-36deg);
}

.challenge-node:nth-child(4) {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(72deg) translateY(-128px) rotate(-72deg);
}

.challenge-node:nth-child(5) {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(108deg) translateY(-128px) rotate(-108deg);
}

.challenge-node:nth-child(6) {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(144deg) translateY(-128px) rotate(-144deg);
}

.challenge-node:nth-child(7) {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(180deg) translateY(-128px) rotate(-180deg);
}

.challenge-node:nth-child(8) {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(216deg) translateY(-128px) rotate(-216deg);
}

.challenge-node:nth-child(9) {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(252deg) translateY(-128px) rotate(-252deg);
}

.challenge-node:nth-child(10) {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(288deg) translateY(-128px) rotate(-288deg);
}

.challenge-node:nth-child(11) {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(324deg) translateY(-128px) rotate(-324deg);
}

.category-icon {
    width: 24px;
    height: 24px;
}

.category-label {
    display: none;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-primary);
    text-align: center;
}

/* ===== CHALLENGE CARDS ===== */
.challenge-details {
    margin-top: var(--spacing-xl);
}

.challenge {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-xl);
}

.challenge-category {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-sm);
}

.challenge-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-lg);
}

.step {
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.step h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.prompt {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.hint-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: var(--btn-transition);
}

.hint-toggle:hover {
    background-color: rgba(48, 30, 103, 0.05);
}

.info-icon {
    width: 20px;
    height: 20px;
}

.hint {
    background-color: #F3F1F9;
    border-left: 3px solid var(--color-primary);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    margin-top: var(--spacing-sm);
    position: sticky;
    top: var(--spacing-md);
    z-index: 5;
    box-shadow: var(--shadow-sm);
}

.hint p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin: 0;
    line-height: 1.5;
}

.hint-close {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    float: right;
    margin-left: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: var(--btn-transition);
}

.hint-close:hover {
    background-color: rgba(48, 30, 103, 0.1);
}

.close-icon {
    width: 16px;
    height: 16px;
}

.additional-steps {
    margin-top: var(--spacing-lg);
}

.expand-btn {
    width: 100%;
    background: none;
    border: 1.5px solid var(--color-primary);
    color: var(--color-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: var(--btn-transition);
    margin-top: var(--spacing-lg);
}

.expand-btn:hover {
    background-color: var(--color-primary);
    color: var(--color-text-on-primary);
}

.arrow-icon {
    width: 16px;
    height: 16px;
    transition: transform 0.3s ease;
}

.expand-btn.expanded .arrow-icon {
    transform: rotate(180deg);
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--color-bg-neutral);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-xl);
}

.footer-content {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    text-align: center;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.social-links a {
    display: block;
    width: 32px;
    height: 32px;
    transition: var(--btn-transition);
}

.social-links a:hover {
    transform: scale(1.1);
    opacity: 0.7;
}

.social-links img {
    width: 100%;
    height: 100%;
}

.footer-about {
    font-size: 1.2rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.footer-legal {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.footer-legal a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--btn-transition);
}

.footer-legal a:hover {
    text-decoration: underline;
}

.copyright {
    color: var(--color-text-secondary);
}

/* ===== TABLET BREAKPOINT (768px+) ===== */
@media (min-width: 768px) {

    /* Layout */
    .site-width {
        max-width: 900px;
        padding: 0 var(--spacing-xl);
    }

    /* Hero - Even larger grid */
    .challenge-grid {
        width: 580px;
        height: 580px;
    }

    /* Spin button - Larger */
    .spin {
        width: 180px;
        height: 180px;
        font-size: 1.625rem;
        /* Slightly bigger text too */
    }

    /* Challenge nodes - Bigger for comfortable labels */
    .challenge-node {
        width: 110px;
        /* Was 100px */
        height: 110px;
    }

    /* Node icons */
    .category-icon {
        width: 32px;
        height: 32px;
    }

    /* Node labels */
    .category-label {
        display: block;
        font-size: 0.75rem;
        line-height: 1.2;
        margin-top: 4px;
        font-weight: 600;
    }

    /* Adjust gap in node content */
    .node-content {
        gap: 6px;
    }

    .challenge-node:hover .node-content {
        transform: scale(1.03);
        /* Very subtle */
    }

    /* Circular positioning - larger radius */
    .challenge-node:nth-child(2) {
        transform: translate(-50%, -50%) rotate(0deg) translateY(-235px);
        /* Was -210px */
    }

    .challenge-node:nth-child(3) {
        transform: translate(-50%, -50%) rotate(36deg) translateY(-235px) rotate(-36deg);
    }

    .challenge-node:nth-child(4) {
        transform: translate(-50%, -50%) rotate(72deg) translateY(-235px) rotate(-72deg);
    }

    .challenge-node:nth-child(5) {
        transform: translate(-50%, -50%) rotate(108deg) translateY(-235px) rotate(-108deg);
    }

    .challenge-node:nth-child(6) {
        transform: translate(-50%, -50%) rotate(144deg) translateY(-235px) rotate(-144deg);
    }

    .challenge-node:nth-child(7) {
        transform: translate(-50%, -50%) rotate(180deg) translateY(-235px) rotate(-180deg);
    }

    .challenge-node:nth-child(8) {
        transform: translate(-50%, -50%) rotate(216deg) translateY(-235px) rotate(-216deg);
    }

    .challenge-node:nth-child(9) {
        transform: translate(-50%, -50%) rotate(252deg) translateY(-235px) rotate(-252deg);
    }

    .challenge-node:nth-child(10) {
        transform: translate(-50%, -50%) rotate(288deg) translateY(-235px) rotate(-288deg);
    }

    .challenge-node:nth-child(11) {
        transform: translate(-50%, -50%) rotate(324deg) translateY(-235px) rotate(-324deg);
    }

    /* Footer */
    .footer-legal {
        flex-direction: row;
        justify-content: center;
        gap: var(--spacing-md);
    }

    .copyright::before {
        content: "| ";
        margin-right: var(--spacing-sm);
    }
}

/* ===== DESKTOP BREAKPOINT (1024px+) ===== */
@media (min-width: 1024px) {
  
  /* Layout - Larger max-width and even more generous padding */
  .site-width {
    max-width: 1200px; /* Was 900px on tablet */
    padding: 0 calc(var(--spacing-xl) * 1.5); /* 72px side padding */
  }
  
  /* Typography - Slightly larger for readability on big screens */
  h1 {
    font-size: 2.25rem; /* Was 2rem, now 36px */
  }
  
  h2 {
    font-size: 1.75rem; /* Was 1.5rem, now 28px */
  }
  
  /* Hero - Scale up the grid further */
  .challenge-grid {
    width: 680px; /* Was 580px on tablet */
    height: 680px;
  }
  
  /* Spin button - Proportionally larger */
  .spin {
    width: 200px; /* Was 180px */
    height: 200px;
    font-size: 1.75rem; /* Was 1.625rem */
  }
  
  /* Challenge nodes - Larger with more room */
  .challenge-node {
    width: 120px; /* Was 110px */
    height: 120px;
  }
  
  /* Node icons - Scale up */
  .category-icon {
    width: 36px; /* Was 32px */
    height: 36px;
  }
  
  /* Node labels - Slightly larger font */
  .category-label {
    font-size: 0.8125rem; /* 13px, was 12px */
    margin-top: 5px;
  }
  
  /* Node content gap */
  .node-content {
    gap: 8px; /* Was 6px */
  }
  
  /* Circular positioning - larger radius for desktop */
  .challenge-node:nth-child(2) { 
    transform: translate(-50%, -50%) rotate(0deg) translateY(-280px); /* Was -235px */
  }
  .challenge-node:nth-child(3) { 
    transform: translate(-50%, -50%) rotate(36deg) translateY(-280px) rotate(-36deg);
  }
  .challenge-node:nth-child(4) { 
    transform: translate(-50%, -50%) rotate(72deg) translateY(-280px) rotate(-72deg);
  }
  .challenge-node:nth-child(5) { 
    transform: translate(-50%, -50%) rotate(108deg) translateY(-280px) rotate(-108deg);
  }
  .challenge-node:nth-child(6) { 
    transform: translate(-50%, -50%) rotate(144deg) translateY(-280px) rotate(-144deg);
  }
  .challenge-node:nth-child(7) { 
    transform: translate(-50%, -50%) rotate(180deg) translateY(-280px) rotate(-180deg);
  }
  .challenge-node:nth-child(8) { 
    transform: translate(-50%, -50%) rotate(216deg) translateY(-280px) rotate(-216deg);
  }
  .challenge-node:nth-child(9) { 
    transform: translate(-50%, -50%) rotate(252deg) translateY(-280px) rotate(-252deg);
  }
  .challenge-node:nth-child(10) { 
    transform: translate(-50%, -50%) rotate(288deg) translateY(-280px) rotate(-288deg);
  }
  .challenge-node:nth-child(11) { 
    transform: translate(-50%, -50%) rotate(324deg) translateY(-280px) rotate(-324deg);
  }
  
  /* Challenge cards - Optional: slightly more padding */
  .challenge {
    padding: var(--spacing-xl); /* Was 24px, now 48px */
  }
  
  /* Footer - Increase spacing */
  .footer {
    padding: calc(var(--spacing-xl) * 1.5) 0; /* 72px vertical padding */
  }
  
  .social-links {
    gap: var(--spacing-xl); /* More spacing between icons */
  }
  
  .social-links a {
    width: 36px; /* Slightly larger icons */
    height: 36px;
  }
}