/*
 * Practice menu loading overlay — SC / RE / RC
 * Visual only; #loading-overlay id + display:flex onsubmit unchanged.
 */

#loading-overlay.practice-loading {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 3000;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
    box-sizing: border-box;
    text-align: center;
    color: var(--ink);
    background:
        radial-gradient(
            ellipse 90% 70% at 50% 0%,
            rgba(124, 199, 255, 0.18) 0%,
            transparent 58%
        ),
        radial-gradient(
            ellipse 70% 55% at 85% 85%,
            rgba(158, 125, 244, 0.12) 0%,
            transparent 52%
        ),
        rgba(255, 253, 248, 0.78);
    backdrop-filter: blur(20px) saturate(165%);
    -webkit-backdrop-filter: blur(20px) saturate(165%);
}

#loading-overlay.practice-loading::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: var(--clearli-bg-image);
    background-size: cover;
    background-position: center bottom;
    opacity: 0.35;
    pointer-events: none;
    z-index: 0;
}

[data-theme="dark"] #loading-overlay.practice-loading {
    background:
        radial-gradient(
            ellipse 85% 65% at 50% -5%,
            rgba(38, 119, 255, 0.2) 0%,
            transparent 55%
        ),
        radial-gradient(
            ellipse 65% 50% at 12% 90%,
            rgba(158, 125, 244, 0.14) 0%,
            transparent 50%
        ),
        rgba(7, 14, 28, 0.82);
}

[data-theme="dark"] #loading-overlay.practice-loading::before {
    opacity: 0.22;
}

.practice-loading__panel {
    position: relative;
    z-index: 1;
    width: min(100%, 420px);
    padding: 36px 28px 32px;
    border-radius: var(--radius-lg, 20px);
    border: 1px solid var(--border-soft);
    background:
        linear-gradient(
            165deg,
            rgba(255, 255, 255, 0.94) 0%,
            rgba(255, 251, 245, 0.88) 100%
        );
    box-shadow:
        var(--clearli-inset-hi),
        0 20px 50px rgba(7, 43, 110, 0.1),
        0 4px 16px rgba(75, 131, 255, 0.08);
    backdrop-filter: blur(16px) saturate(150%);
    -webkit-backdrop-filter: blur(16px) saturate(150%);
    animation: practice-loading-in 0.45s cubic-bezier(0.22, 1, 0.36, 1) both;
}

[data-theme="dark"] .practice-loading__panel {
    background:
        linear-gradient(
            165deg,
            rgba(18, 32, 58, 0.96) 0%,
            rgba(10, 20, 40, 0.92) 100%
        );
    box-shadow:
        var(--clearli-inset-hi),
        0 24px 56px rgba(0, 0, 0, 0.45),
        0 0 48px rgba(38, 119, 255, 0.08);
}

.practice-loading__icon-wrap {
    position: relative;
    width: 76px;
    height: 76px;
    margin: 0 auto 22px;
    display: grid;
    place-items: center;
}

.practice-loading__icon-ring {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: conic-gradient(
        from 210deg,
        var(--practice-load-accent, #4b83ff) 0deg,
        rgba(103, 216, 200, 0.85) 120deg,
        rgba(158, 125, 244, 0.75) 220deg,
        var(--practice-load-accent, #4b83ff) 360deg
    );
    opacity: 0.9;
    animation: practice-loading-spin 2.4s linear infinite;
}

.practice-loading__icon-ring::after {
    content: "";
    position: absolute;
    inset: 3px;
    border-radius: 50%;
    background: linear-gradient(
        165deg,
        rgba(255, 255, 255, 0.98) 0%,
        rgba(248, 241, 232, 0.95) 100%
    );
}

[data-theme="dark"] .practice-loading__icon-ring::after {
    background: linear-gradient(
        165deg,
        rgba(16, 28, 52, 0.98) 0%,
        rgba(9, 18, 36, 0.96) 100%
    );
}

.practice-loading__icon {
    position: relative;
    z-index: 1;
    font-size: 1.65rem;
    color: var(--practice-load-accent, var(--royal));
    animation: practice-loading-pulse 1.6s ease-in-out infinite;
}

.practice-loading__title {
    margin: 0 0 10px;
    font-size: clamp(1.25rem, 3.5vw, 1.55rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--ink);
    line-height: 1.25;
}

.practice-loading__subtitle {
    margin: 0 auto 22px;
    max-width: 34ch;
    font-size: 0.98rem;
    line-height: 1.6;
    color: var(--subtitle);
    font-weight: 500;
}

.practice-loading__progress {
    position: relative;
    height: 5px;
    border-radius: 999px;
    background: rgba(75, 131, 255, 0.12);
    overflow: hidden;
    -webkit-mask-image: linear-gradient(
        90deg,
        transparent 0%,
        #000 5%,
        #000 95%,
        transparent 100%
    );
    mask-image: linear-gradient(
        90deg,
        transparent 0%,
        #000 5%,
        #000 95%,
        transparent 100%
    );
}

[data-theme="dark"] .practice-loading__progress {
    background: rgba(124, 199, 255, 0.12);
}

.practice-loading__progress-bar {
    position: absolute;
    top: 0;
    left: 0;
    display: block;
    height: 100%;
    width: 40%;
    border-radius: inherit;
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0) 0%,
        var(--practice-load-accent, #4b83ff) 18%,
        rgba(103, 216, 200, 0.95) 82%,
        rgba(255, 255, 255, 0) 100%
    );
    animation: practice-loading-slide 1.5s linear infinite;
    will-change: transform;
}

/* Section accents */
.practice-loading--sc {
    --practice-load-accent: #f59e0b;
}

.practice-loading--sc .practice-loading__icon-ring {
    background: conic-gradient(
        from 210deg,
        #f59e0b 0deg,
        #fbbf24 120deg,
        #ea580c 240deg,
        #f59e0b 360deg
    );
}

.practice-loading--sc .practice-loading__progress-bar {
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0) 0%,
        #f59e0b 18%,
        #fbbf24 82%,
        rgba(255, 255, 255, 0) 100%
    );
}

.practice-loading--re {
    --practice-load-accent: #e11d48;
}

.practice-loading--re .practice-loading__icon-ring {
    background: conic-gradient(
        from 210deg,
        #e11d48 0deg,
        #fb7185 120deg,
        #be123c 240deg,
        #e11d48 360deg
    );
}

.practice-loading--re .practice-loading__progress-bar {
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0) 0%,
        #e11d48 18%,
        #fb7185 82%,
        rgba(255, 255, 255, 0) 100%
    );
}

.practice-loading--rc {
    --practice-load-accent: #4b83ff;
}

.practice-loading--rc .practice-loading__icon-ring {
    background: conic-gradient(
        from 210deg,
        #4b83ff 0deg,
        #7cc7ff 120deg,
        #6366f1 240deg,
        #4b83ff 360deg
    );
}

.practice-loading--rc .practice-loading__progress-bar {
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0) 0%,
        #4b83ff 18%,
        #67d8c8 82%,
        rgba(255, 255, 255, 0) 100%
    );
}

@keyframes practice-loading-in {
    from {
        opacity: 0;
        transform: translateY(14px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

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

@keyframes practice-loading-pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.06); opacity: 0.88; }
}

@keyframes practice-loading-slide {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(250%);
    }
}

@media (prefers-reduced-motion: reduce) {
    .practice-loading__panel,
    .practice-loading__icon-ring,
    .practice-loading__icon,
    .practice-loading__progress-bar {
        animation: none !important;
    }

    .practice-loading__icon-ring {
        background: var(--practice-load-accent, #4b83ff);
        opacity: 0.35;
    }
}

@media (prefers-reduced-transparency: reduce) {
    #loading-overlay.practice-loading,
    .practice-loading__panel {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }

    #loading-overlay.practice-loading {
        background: var(--bg-base);
    }

    .practice-loading__panel {
        background: var(--card-solid);
    }
}