/*---------------------------------------/*
 # SETTINGS
/*---------------------------------------*/

/* Prevent horizontal overflow on mobile */
* {
    box-sizing: border-box;
}

html, body {
    max-width: 100%;
    overflow-x: hidden;
    padding-bottom: 35px;
}

:root {
    /* Primary brand color (10%) */
    --primary-color: #2c6fb8; /* blue */
    --secondary-color: #1f5aa0; /* slightly darker blue for gradients */
    --tertiary-color: #1a4f93;

    /* Light mode neutrals */
    --bg-60: #f7f8fa; /* 60% background - very light */
    --bg-30: #e1e4e8; /* 30% surface/grey */
    --bg-10: #ffffff; /* 10% accents (pure white) */

    /* Text colors */
    --text-60: #111418; /* primary text (dark) */
    --text-30: #4b5561; /* secondary text (muted) */
    --text-10: #9aa6b2; /* subtle muted */

    /* UI helpers */
    --border-color: #d3d7db;
    --accent-color: var(--primary-color);
    --success-color: #1f8a49;
    --danger-color: #c62828;
    --hover-bg: #f0f3f6;
    --active-bg: #e6eef8;
    --shadow-light: rgba(44,76,124,0.06);

    /* Spacing and sizing */
    --border-radius: 8px;
    --border-radius-sm: 4px;
    --border-radius-lg: 12px;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Typography */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 2rem;

    /* Map commonly used vars to the 60/30/10 tokens */
    --bg-primary: var(--bg-60);
    --bg-secondary: var(--bg-30);
    --bg-tertiary: var(--bg-10);
    --text-primary: var(--text-60);
    --text-secondary: var(--text-30);
    --text-muted: var(--text-10);
    --text-inverse: #ffffff;
    --border-focus: var(--primary-color);
    --shadow-medium: rgba(44,76,124,0.15);
    --shadow-heavy: rgba(44,76,124,0.25);
    --pulse-color: var(--primary-color);
    --pulse-glow: rgba(44,111,184,0.7);
    --bg-overlay: rgba(0, 0, 0, 0.15);
    --warning-color: #e65100;
    --info-color: #0d61aa;
}

/* Dark theme - activated by .theme-dark class */
[data-theme="dark"],
.theme-dark {
    /* Primary brand color (10%) - keep blue */
    --primary-color: #2c6fb8;
    --secondary-color: #1f5aa0;
    --tertiary-color: #1a4f93;

    /* Dark mode neutrals */
    --bg-60: #0f1112; /* 60% background - near black */
    --bg-30: #1f2326; /* 30% surface/grey */
    --bg-10: #0a0b0c; /* accents */

    /* Text colors */
    --text-60: #e6eef8; /* primary text (light) */
    --text-30: #b9c5d6; /* secondary text */
    --text-10: #8f9fb0; /* subtle muted */

    /* UI helpers */
    --border-color: #2a3034;
    --accent-color: var(--primary-color);
    --success-color: #36b37e;
    --danger-color: #ff6b6b;
    --hover-bg: #14171a;
    --active-bg: #1a1f23;
    --shadow-light: rgba(0,0,0,0.5);

    /* Map commonly used vars */
    --bg-primary: var(--bg-60);
    --bg-secondary: var(--bg-30);
    --bg-tertiary: var(--bg-10);
    --text-primary: var(--text-60);
    --text-secondary: var(--text-30);
    --text-muted: var(--text-10);
    --text-inverse: #0f1112;
    --border-focus: #60a5fa;
    --shadow-medium: rgba(0,0,0,0.6);
    --shadow-heavy: rgba(0,0,0,0.8);
    --pulse-color: var(--primary-color);
    --pulse-glow: rgba(44,111,184,0.7);
    --bg-overlay: rgba(255, 255, 255, 0.12);
    --warning-color: #ffb74d;
    --info-color: #4fc3f7;
}


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

/*---------------------------------------/*
 # ELEMENTS
/*---------------------------------------*/
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: var(--font-size-base);
    transition: all 0.3s ease;
    min-height: 100vh;
    position: relative;
}

/* Spire Background - Sharp spire imagery that adapts to theme, stays fixed in viewport */
.spire-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.spire-background img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    filter: brightness(0.7);
    opacity: 0;
    transition: opacity 0.6s ease-in-out;
    pointer-events: none;
}

/* Light mode: show light spire - MUCH MORE VISIBLE */
[data-theme="light"] .spire-bg-light,
.theme-light .spire-bg-light,
body:not([data-theme]) .spire-bg-light {
    opacity: 0.85;
    filter: brightness(0.85);
}

/* Dark mode: show dark spire - MUCH MORE VISIBLE */
[data-theme="dark"] .spire-bg-dark,
.theme-dark .spire-bg-dark {
    opacity: 0.75;
    filter: brightness(0.65);
}

/* Reduced overlay to let the spire image shine through */
.spire-background::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to bottom,
        transparent 0%,
        transparent 40%,
        var(--bg-primary) 100%
    );
    opacity: 0;
    pointer-events: none;
}

/* Enhance content readability with subtle backdrop on containers */
.o-container,
.c-header {
    position: relative;
}

.o-container::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    background: var(--bg-primary);
    opacity: 0;
    border-radius: var(--border-radius-lg);
    z-index: -1;
    pointer-events: none;
}

/* Smooth transitions for theme changes */
body * {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

/*---------------------------------------/*
 # OBJECTS
/*---------------------------------------*/
.o-container {
    width: 100%;
    max-width: 1200px;
    padding: 0 var(--spacing-md);
    margin: var(--spacing-md) auto;
    position: relative;
    z-index: 1; /* Ensure content stays above pulse effects */
}

.o-button-group {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.o-status-display {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    background-color: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px var(--shadow-light);
}

.o-servo-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

/*---------------------------------------/*
 # COMPONENTS
/*---------------------------------------*/
.c-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-inverse);
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    position: relative;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 8px var(--shadow-light);
    z-index: 1;
}

.c-header__link {
    text-decoration: none;
    color: inherit;
}

.c-header__link:hover .c-header__title {
    text-decoration: underline;
}

.c-header__title {
    margin: 0;
    display: inline-block;
    font-size: var(--font-size-2xl) !important;
    font-weight: 600;
    color: white !important;
}

.c-header {
    color: white !important;
    margin: 0;
}

.c-welcome-message {
    background-color: var(--bg-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-xl);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px var(--shadow-light);
}

.c-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    position: relative;
    overflow: hidden;
    min-height: 44px; /* Touch target accessibility */
    transition: all 0.2s ease;
}

.c-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

.c-btn:focus {
    outline: none;
}

.c-btn:focus-visible {
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.25);
    transform: translateY(-1px);
}

.c-btn:active {
    transform: translateY(0);
}

.c-btn--primary,
.c-btn--secondary,
.c-btn--tertiary {
    background-color: #fff;
    color: #000;
    border: 2px solid #000;
}

.c-btn--primary:hover,
.c-btn--secondary:hover,
.c-btn--tertiary:hover {
    background-color: #fff;
    border-color: var(--primary-color);
    color: var(--primary-color);
    box-shadow: 0 0 0 1px var(--primary-color), 0 4px 12px rgba(30, 58, 138, 0.15);
}

/* Dark mode button styles */
[data-theme="dark"] .c-btn--primary,
[data-theme="dark"] .c-btn--secondary,
[data-theme="dark"] .c-btn--tertiary,
.theme-dark .c-btn--primary,
.theme-dark .c-btn--secondary,
.theme-dark .c-btn--tertiary {
    background-color: #000;
    color: #fff;
    border: 2px solid #fff;
}

[data-theme="dark"] .c-btn--primary:hover,
[data-theme="dark"] .c-btn--secondary:hover,
[data-theme="dark"] .c-btn--tertiary:hover,
.theme-dark .c-btn--primary:hover,
.theme-dark .c-btn--secondary:hover,
.theme-dark .c-btn--tertiary:hover {
    background-color: #000;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 1px var(--primary-color), 0 4px 12px rgba(96, 165, 250, 0.25);
}

.c-btn--delete {
    background-color: var(--danger-color);
    color: var(--text-inverse);
}

.c-btn--delete:hover {
    background-color: #c53030;
}

.c-btn--tertiary {
    background-color: #fff;
    color: #000;
    border: 2px solid #000;
}

.c-btn--tertiary:hover {
    background-color: #fff;
    border-color: var(--primary-color);
    color: var(--primary-color);
    box-shadow: 0 0 0 1px var(--primary-color), 0 4px 12px rgba(30, 58, 138, 0.15);
}

/* Specific buttons that should remain blue */
#startQuizBtn,
#studyQuizBtn,
#articleTheSpireBtn,
button[onclick*="idleGame/idlegame.html"] {
    background-color: var(--primary-color) !important;
    color: white !important;
    border: 2px solid black !important;
}

#startQuizBtn:hover,
#studyQuizBtn:hover,
#articleTheSpireBtn:hover,
button[onclick*="idleGame/idlegame.html"]:hover {
    background-color: var(--primary-color) !important;
    color: white !important;
    border: 2px solid white !important;
}

.c-btn--admin {
    background-color: var(--dark-color);
    color: white;
}

/* Small button variant */
.c-btn--sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
}

/* Theme toggle button (formerly servo button) */
#servoTestBtn {
    position: relative;
    overflow: visible;
    z-index: 1;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-inverse);
    border: 2px solid var(--border-color);
    padding: var(--spacing-md) calc(var(--spacing-lg) + 30px); /* Extra padding for icons */
    text-align: center;
}

.c-theme-toggle::before {
    content: "☀️";
    font-size: 1rem;
    transition: all 0.3s ease;
    margin-right: 0.5rem;
    flex-shrink: 0;
    width: 1.2rem;
    height: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

[data-theme="dark"] .c-theme-toggle::before {
    content: "🌙";
}

/* Remove the ::after pseudo-element since we only need one icon */
#servoTestBtn::after {
    display: none;
}

#servoTestBtn:hover {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    transform: translateY(-2px);
}

/* Responsive adjustments for theme button */
@media (max-width: 480px) {
    #servoTestBtn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--font-size-sm);
    }
    
    #servoTestBtn::before,
    #servoTestBtn::after {
        font-size: 1em;
    }
}

.c-info-btn {
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid var(--text-inverse);
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-inverse);
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.c-info-btn:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-50%) scale(1.1);
}

.c-modal {
    display: none;
    position: fixed;
    z-index: 10000; /* Higher than pulse effects */
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: var(--bg-overlay);
    backdrop-filter: blur(4px);
}

.c-modal__content {
    background-color: var(--bg-secondary);
    margin: 5% auto;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    width: 90%;
    max-width: 800px;
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 25px -5px var(--shadow-heavy);
    position: relative;
    color: var(--text-primary);
}

.c-modal__close {
    color: var(--text-secondary);
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.2s ease;
}

.c-modal__close:hover {
    color: var(--text-primary);
}

.c-info-section {
    margin-bottom: var(--spacing-lg);
}

.c-info-section__title {
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
    font-weight: 600;
}

.c-items-list {
    list-style-type: none;
    margin-left: var(--spacing-md);
}

.c-items-list__item {
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--text-secondary);
}

.c-items-list__item::before {
    content: "•";
    color: var(--primary-color);
    font-size: 1.2rem;
    position: absolute;
    left: 0;
    top: 0;
}

.c-servo-test {
    margin-top: var(--spacing-lg);
    background-color: var(--bg-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px var(--shadow-light);
}

.c-login-form {
    background-color: var(--bg-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px var(--shadow-light);
    max-width: 400px;
    margin: 0 auto;
}

.c-login-input {
    width: 100%;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-base);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.c-login-input:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(74, 134, 232, 0.1);
}

.c-error-message {
    color: var(--danger-color);
    background-color: rgba(239, 68, 68, 0.1);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--danger-color);
    margin-bottom: var(--spacing-md);
    display: none;
}

.c-error-message.is-visible {
    display: block;
}

.c-loading-spinner {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
    margin-right: 0.5rem;
}

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

/* Floating dark mode modal (bottom-right) */
.dm-fab {
    position: fixed;
    right: 18px;
    bottom: 18px;
    z-index: 10000;
    width: 44px; height: 44px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-inverse);
    box-shadow: 0 6px 16px var(--shadow-medium);
    cursor: pointer;
}
.dm-popover {
    position: fixed;
    right: 18px; bottom: 72px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    box-shadow: 0 10px 24px var(--shadow-heavy);
    padding: .75rem;
    display: none;
    z-index: 10000;
}
.dm-popover.is-open { display: block; }
.dm-popover__row { font-weight: 600; margin-bottom: .5rem }
.dm-popover__actions { display: flex; gap: .5rem }

/* Solar sonar animation */
@keyframes solarSonar {
    0% {
        transform: rotate(0deg);
        opacity: 0.8;
        width: 50px;
    }
    50% {
        opacity: 0.4;
    }
    100% {
        transform: rotate(360deg);
        opacity: 0;
        width: 1500px;
    }
}

.sonar-sweep {
    position: fixed;
    top: 50%;
    left: 50%;
    transform-origin: 0 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--pulse-color), transparent);
    z-index: 9998;
    pointer-events: none;
    border-radius: 50%;
    filter: blur(1px);
    box-shadow: 0 0 15px 5px var(--pulse-glow);
}

/* Theme toggle functionality - replaces color cycling */
.theme-toggle-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-inverse);
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 1.2rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    min-width: 120px;
    white-space: nowrap;
    border: none;
}

/* Legacy theme classes - maintained for backwards compatibility but now only affect pulse colors */
.theme-blue {
    --pulse-color: #4a86e8;
    --pulse-glow: rgba(74, 134, 232, 0.7);
}

.theme-orange {
    --pulse-color: #ff8c00;
    --pulse-glow: rgba(255, 140, 0, 0.7);
}

.theme-green {
    --pulse-color: #4caf50;
    --pulse-glow: rgba(76, 175, 80, 0.7);
}

.theme-purple {
    --pulse-color: #9c27b0;
    --pulse-glow: rgba(156, 39, 176, 0.7);
}

.theme-red {
    --pulse-color: #f44336;
    --pulse-glow: rgba(244, 67, 54, 0.7);
}

.theme-cyan {
    --pulse-color: #00bcd4;
    --pulse-glow: rgba(0, 188, 212, 0.7);
}

/* Additional fruit-themed pulse colors */
.theme-banana-yellow {
    --pulse-color: #fbbf24;
    --pulse-glow: rgba(251, 191, 36, 0.7);
}

.theme-blueberry-blue {
    --pulse-color: #2c4c7c;;
    --pulse-glow: rgba(59, 130, 246, 0.7);
}

.theme-orange-orange {
    --pulse-color: #f97316;
    --pulse-glow: rgba(249, 115, 22, 0.7);
}

.theme-strawberry-red {
    --pulse-color: #ef4444;
    --pulse-glow: rgba(239, 68, 68, 0.7);
}

.theme-kiwi-green {
    --pulse-color: #22c55e;
    --pulse-glow: rgba(34, 197, 94, 0.7);
}

.theme-grape-purple {
    --pulse-color: #8b5cf6;
    --pulse-glow: rgba(139, 92, 246, 0.7);
}

/*---------------------------------------/*
 # UTILITIES
/*---------------------------------------*/
.u-flex {
    display: flex;
}

.u-gap-1 {
    gap: 1rem;
}

.u-mb-2 {
    margin-bottom: 2rem;
}

/* New utility: top margin */
.u-mt-2 {
    margin-top: 2rem;
}

/* Connection status styles */
.status-initial {
    color: #666;
    background-color: #f0f0f0;
    padding: 0.5rem;
    text-align: center;
}

.status-connected {
    color: var(--success-color);
    background-color: rgba(46, 139, 52, 0.1);
    padding: 0.5rem;
    text-align: center;
}

.status-disconnected {
    color: var(--danger-color);
    background-color: rgba(211, 47, 47, 0.1);
    padding: 0.5rem;
    text-align: center;
}

/* Responsive design */
@media screen and (min-width: 1024px) {
    .o-container {
        margin: var(--spacing-xl) auto;
        padding: 0 var(--spacing-xl);
    }

    .o-button-group {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: var(--spacing-lg);
        margin-bottom: var(--spacing-xl);
    }

    .o-status-display {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }

    .o-servo-buttons {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        gap: var(--spacing-lg);
    }

    .c-header {
        padding: var(--spacing-xl);
    }


    .c-btn {
        padding: var(--spacing-md) var(--spacing-xl);
        font-size: var(--font-size-lg);
    }
}

/* Dark mode preference detection */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]):not(.theme-light) {
        /* Apply dark theme variables when system preference is dark and no explicit light theme is set */
        --bg-primary: #0f172a;
        --bg-secondary: #1e293b;
        --bg-tertiary: #334155;
        --bg-overlay: rgba(255, 255, 255, 0.1);
        
        --text-primary: #f1f5f9;
        --text-secondary: #cbd5e1;
        --text-muted: #94a3b8;
        --text-inverse: #0f172a;
        
        --border-color: #374151;
        --border-focus: #60a5fa;
        --shadow-light: rgba(0, 0, 0, 0.3);
        --shadow-medium: rgba(0, 0, 0, 0.4);
        --shadow-heavy: rgba(0, 0, 0, 0.6);
        
        --hover-bg: rgba(96, 165, 250, 0.12);
        --active-bg: rgba(96, 165, 250, 0.16);
        
        --primary-color: #2c4c7c;
        --secondary-color: #1d4ed8;
        --tertiary-color: #60a5fa;
        --accent-color: #60a5fa;
        --pulse-color: #60a5fa;
        --pulse-glow: rgba(96, 165, 250, 0.7);
        
        --success-color: #10b981;
        --danger-color: #ef4444;
                --warning-color: #f59e0b;
        --info-color: #2c4c7c;
    }
}

/* Utility Classes */
.u-center-button {
    max-width: 320px;
    margin-left: auto;
    margin-right: auto;
}

.c-header__subtitle {
    font-size: 1rem;
    opacity: 0.8;
    margin-top: 5px;
}