/* ==========================================
   CANVAS UI & REDESIGN DESIGN SYSTEM
   ========================================== */

/* Fullscreen Backdrop Canvas */
.canvas-ui-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    max-width: 100%;
    height: 100vh;
    height: 100dvh;
    pointer-events: none;
    z-index: 0;
    opacity: 0.85;
    transition: opacity 0.4s ease;
}

/* Interactive Canvas UI Controls Badge */
.canvas-ui-controls {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 99;
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(18, 18, 26, 0.75);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 999px;
    padding: 6px 14px;
    min-height: 44px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4), 0 0 20px rgba(108, 92, 231, 0.15);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.canvas-ui-controls:hover {
    border-color: rgba(108, 92, 231, 0.4);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5), 0 0 28px rgba(108, 92, 231, 0.3);
    transform: translateY(-2px);
}

.canvas-ui-badge {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #a0a0c0;
    display: flex;
    align-items: center;
    gap: 6px;
}

.canvas-ui-badge__dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #00b894;
    box-shadow: 0 0 10px #00b894;
    animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.6; }
}

.canvas-ui-btn {
    background: transparent;
    border: none;
    color: #e0e0ff;
    font-size: 0.82rem;
    cursor: pointer;
    padding: 8px 12px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: background 0.2s ease, color 0.2s ease;
}

.canvas-ui-btn:focus-visible, .tone-btn:focus-visible {
    outline: 2px solid #6c5ce7;
    outline-offset: 2px;
}

.canvas-ui-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
}

/* Creative Tone Visualizer Canvas Container */
.tone-canvas-card {
    background: rgba(18, 18, 28, 0.65);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 24px;
    margin: 24px 0;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.tone-canvas-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, #ff7675, #fdcb6e, #00b894, #6c5ce7);
}

.tone-canvas-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.tone-canvas-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tone-canvas-subtitle {
    font-size: 0.82rem;
    color: #a0a0c0;
}

.tone-buttons-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 16px;
}

.tone-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 12px 8px;
    color: #ffffff;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.tone-btn[data-tone="1"] { border-color: rgba(253, 203, 110, 0.4); }
.tone-btn[data-tone="2"] { border-color: rgba(0, 184, 148, 0.4); }
.tone-btn[data-tone="3"] { border-color: rgba(108, 92, 231, 0.4); }
.tone-btn[data-tone="4"] { border-color: rgba(255, 118, 117, 0.4); }

.tone-btn:hover, .tone-btn.active {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.tone-btn[data-tone="1"]:hover, .tone-btn[data-tone="1"].active {
    background: rgba(253, 203, 110, 0.18);
    box-shadow: 0 8px 24px rgba(253, 203, 110, 0.25);
}
.tone-btn[data-tone="2"]:hover, .tone-btn[data-tone="2"].active {
    background: rgba(0, 184, 148, 0.18);
    box-shadow: 0 8px 24px rgba(0, 184, 148, 0.25);
}
.tone-btn[data-tone="3"]:hover, .tone-btn[data-tone="3"].active {
    background: rgba(108, 92, 231, 0.18);
    box-shadow: 0 8px 24px rgba(108, 92, 231, 0.25);
}
.tone-btn[data-tone="4"]:hover, .tone-btn[data-tone="4"].active {
    background: rgba(255, 118, 117, 0.18);
    box-shadow: 0 8px 24px rgba(255, 118, 117, 0.25);
}

.tone-btn__mark {
    font-size: 1.4rem;
}
.tone-btn__label {
    font-size: 0.75rem;
    font-weight: 500;
    opacity: 0.85;
}

.tone-canvas-view {
    width: 100%;
    height: 180px;
    border-radius: 14px;
    background: rgba(10, 10, 16, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.08);
    display: block;
}

/* Character Stroke Drawing Canvas Component */
.stroke-canvas-wrapper {
    position: relative;
    width: 240px;
    height: 240px;
    margin: 0 auto;
    border-radius: 20px;
    background: rgba(15, 15, 24, 0.85);
    border: 2px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4), inset 0 0 20px rgba(0, 0, 0, 0.6);
    overflow: hidden;
}

.stroke-canvas-wrapper canvas {
    width: 100%;
    height: 100%;
    cursor: crosshair;
    touch-action: none;
}

.stroke-canvas-guide {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 120px;
    color: rgba(255, 255, 255, 0.06);
    font-family: 'Noto Sans SC', serif;
    pointer-events: none;
    user-select: none;
}

.stroke-canvas-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    border: 1px dashed rgba(255, 255, 255, 0.06);
}

.stroke-canvas-grid::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    border-top: 1px dashed rgba(255, 255, 255, 0.06);
}

.stroke-canvas-grid::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 1px;
    border-left: 1px dashed rgba(255, 255, 255, 0.06);
}

.stroke-controls {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 14px;
}

/* Radial Progress Canvas Ring */
.radial-canvas-ring {
    position: relative;
    width: 120px;
    height: 120px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.radial-canvas-ring canvas {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
}

.radial-canvas-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.radial-canvas-value {
    font-size: 1.3rem;
    font-weight: 800;
    color: #ffffff;
    line-height: 1;
}

.radial-canvas-label {
    font-size: 0.68rem;
    color: #a0a0c0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 2px;
}

@media (hover: hover) {
    .glass-panel:hover {
        border-color: rgba(255, 255, 255, 0.2);
        box-shadow: 0 20px 48px rgba(0, 0, 0, 0.45), 0 0 20px rgba(108, 92, 231, 0.15);
    }
}

@media (prefers-reduced-motion: reduce) {
    .canvas-ui-badge__dot {
        animation: none;
    }
    .canvas-ui-controls, .tone-btn, .glass-panel {
        transition: none !important;
    }
}

@media (max-width: 844px) {
    .canvas-ui-controls {
        bottom: calc(76px + env(safe-area-inset-bottom, 0px));
        right: 16px;
        z-index: 350;
        padding: 4px 10px;
    }
    .tone-buttons-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ==========================================
   IMAGE SHOWCASE CARDS & VISUAL ELEVATION
   ========================================== */
.visual-showcase-card {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    margin: 24px 0;
    border: 1px solid rgba(255, 255, 255, 0.14);
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.15);
    background: rgba(12, 14, 24, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.visual-showcase-img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
    filter: brightness(0.85) contrast(1.1);
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), filter 0.4s ease;
}

.visual-showcase-card:hover .visual-showcase-img {
    transform: scale(1.04);
    filter: brightness(1) contrast(1.15);
}

.visual-showcase-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 24px;
    background: linear-gradient(180deg, rgba(8, 10, 20, 0) 0%, rgba(8, 10, 20, 0.85) 40%, rgba(8, 10, 20, 0.98) 100%);
}

.visual-showcase-tag {
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #00b894;
    margin-bottom: 6px;
    display: inline-block;
}

.visual-showcase-title {
    font-size: 1.3rem;
    font-weight: 800;
    color: #ffffff;
    margin: 0 0 6px 0;
}

.visual-showcase-desc {
    font-size: 0.85rem;
    color: #a0a0c0;
    margin: 0;
    line-height: 1.5;
}

.vocab-seal-banner {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 20px;
    align-items: center;
    padding: 20px;
    background: rgba(18, 18, 28, 0.68);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    margin: 20px 0;
}

.vocab-seal-img {
    width: 140px;
    height: 140px;
    border-radius: 16px;
    object-fit: cover;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.4), 0 0 20px rgba(0, 184, 148, 0.2);
}

@media (max-width: 600px) {
    .vocab-seal-banner {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .vocab-seal-img {
        margin: 0 auto;
    }
}