/**
 * Modern Loading Spinner System
 * Consistent spinner design across Eyes of Azrael
 *
 * Features:
 * - 3 concentric rings (no wonky 4th ring)
 * - Each ring spins independently
 * - Staggered animation delays for visual interest
 * - Perfect centering around container center
 * - Smooth, modern animations
 * - Responsive sizing
 */

:root {
    --spinner-size: 120px;
    --spinner-ring-1-color: var(--color-primary, #9370DB);
    --spinner-ring-2-color: var(--color-secondary, #DAA520);
    --spinner-ring-3-color: var(--color-success, #4ade80);
    --spinner-border-width: 3px;
    --spinner-glow: 0.6;
}

/* Container */
.spinner-container {
    position: relative;
    width: var(--spinner-size);
    height: var(--spinner-size);
    margin: 0 auto;
}

/* Base ring styles */
.spinner-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    border-radius: 50%;
    border: var(--spinner-border-width) solid transparent;
    animation-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;
}

/* Outer Ring - Largest, slowest, purple */
.spinner-ring:nth-child(1) {
    width: 100%;
    height: 100%;
    margin-top: calc(var(--spinner-size) / -2);
    margin-left: calc(var(--spinner-size) / -2);
    border-top-color: var(--spinner-ring-1-color);
    border-right-color: var(--spinner-ring-1-color);
    animation: spinner-rotate 2.4s linear infinite;
    animation-delay: 0s;
    box-shadow: 0 0 24px rgba(147, 112, 219, var(--spinner-glow)), inset 0 0 16px rgba(147, 112, 219, calc(var(--spinner-glow) * 0.3));
}

/* Middle Ring - Medium size, medium speed, gold, reverse direction */
.spinner-ring:nth-child(2) {
    width: 75%;
    height: 75%;
    margin-top: calc(var(--spinner-size) * 0.75 / -2);
    margin-left: calc(var(--spinner-size) * 0.75 / -2);
    border-top-color: var(--spinner-ring-2-color);
    border-right-color: var(--spinner-ring-2-color);
    border-left-color: var(--spinner-ring-2-color);
    animation: spinner-rotate 1.8s linear infinite reverse;
    animation-delay: 0.2s;
    box-shadow: 0 0 18px rgba(218, 165, 32, calc(var(--spinner-glow) * 0.9)), inset 0 0 12px rgba(218, 165, 32, calc(var(--spinner-glow) * 0.2));
}

/* Inner Ring - Smallest, fastest, green */
.spinner-ring:nth-child(3) {
    width: 50%;
    height: 50%;
    margin-top: calc(var(--spinner-size) * 0.5 / -2);
    margin-left: calc(var(--spinner-size) * 0.5 / -2);
    border-top-color: var(--spinner-ring-3-color);
    border-right-color: var(--spinner-ring-3-color);
    border-bottom-color: var(--spinner-ring-3-color);
    animation: spinner-rotate 1.2s linear infinite;
    animation-delay: 0.4s;
    box-shadow: 0 0 14px rgba(74, 222, 128, calc(var(--spinner-glow) * 0.7)), inset 0 0 10px rgba(74, 222, 128, calc(var(--spinner-glow) * 0.15));
}

/* Rotation animation */
@keyframes spinner-rotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* Loading container */
.loading {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 200px;
    padding: 2rem;
}

.loading-text {
    margin-top: 1.5rem;
    color: var(--spinner-ring-1-color);
    font-size: 1rem;
    font-weight: 500;
    opacity: 0.85;
    animation: loading-pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
    letter-spacing: 0.3px;
}

@keyframes loading-pulse {
    0%, 100% {
        opacity: 0.6;
    }
    40%, 60% {
        opacity: 1;
    }
}

/* Responsive sizing */
@media (max-width: 768px) {
    :root {
        --spinner-size: 90px;
        --spinner-border-width: 2.5px;
    }
}

@media (max-width: 480px) {
    :root {
        --spinner-size: 70px;
        --spinner-border-width: 2px;
    }

    .loading {
        min-height: 150px;
        padding: 1.5rem;
    }

    .loading-text {
        font-size: 0.9rem;
    }
}

/* Small spinner variant */
.spinner-container.spinner-sm {
    --spinner-size: 60px;
    --spinner-border-width: 2px;
    --spinner-glow: 0.4;
}

/* Large spinner variant */
.spinner-container.spinner-lg {
    --spinner-size: 160px;
    --spinner-border-width: 4px;
    --spinner-glow: 0.8;
}

/* Inline spinner (for buttons, etc.) */
.spinner-container.spinner-inline {
    --spinner-size: 20px;
    --spinner-border-width: 2px;
    --spinner-glow: 0.3;
    display: inline-block;
    vertical-align: middle;
    margin: 0;
}

/* Dark mode adjustments */
@media (prefers-color-scheme: dark) {
    :root {
        --spinner-glow: 0.8;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .spinner-ring {
        animation-duration: 3s;
    }
}

/*
 * Usage Examples:
 *
 * Basic spinner:
 * <div class="loading">
 *     <div class="spinner-container">
 *         <div class="spinner-ring"></div>
 *         <div class="spinner-ring"></div>
 *         <div class="spinner-ring"></div>
 *     </div>
 *     <div class="loading-text">Loading content...</div>
 * </div>
 *
 * Small spinner:
 * <div class="spinner-container spinner-sm">
 *     <div class="spinner-ring"></div>
 *     <div class="spinner-ring"></div>
 *     <div class="spinner-ring"></div>
 * </div>
 *
 * Inline spinner:
 * <button>
 *     <span class="spinner-container spinner-inline">
 *         <div class="spinner-ring"></div>
 *         <div class="spinner-ring"></div>
 *         <div class="spinner-ring"></div>
 *     </span>
 *     Loading...
 * </button>
 */