/* Detection Panel Styles - Minimalist */
.detection-panel {
    display: flex;
    flex-direction: column;
}

.detection-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid var(--glass-border);
    padding: var(--spacing-md) var(--spacing-lg);
}

.detection-header .panel-title {
    margin: 0;
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text);
}

/* Confidence Badge - Minimalist with colored background */
.confidence-badge {
    font-size: clamp(0.75rem, 1.8vw, 1.125rem);
    font-weight: 700;
    padding: clamp(2px, 0.5vw, 4px) clamp(8px, 1.5vw, 16px);
    border-radius: 16px;
    background: rgba(239, 68, 68, 0.2); /* Default red for low confidence */
    color: #ef4444;
    transition: all 0.3s ease;
}

.confidence-badge.high {
    background: rgba(16, 185, 129, 0.2);
    color: #10b981;
}

.confidence-badge.medium {
    background: rgba(245, 158, 11, 0.2);
    color: #f59e0b;
}

.confidence-badge.low {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
}

.detection-body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    flex: 1;
}

@media (max-width: 768px) {
    .detection-body {
        padding: 0.75rem 0.5rem;
    }
}

.detection-result {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.detected-letter {
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
    text-shadow: 0 0 30px rgba(16, 185, 129, 0.3);
}

/* Smaller text for "TRAINING" mode */
.detected-letter.training-mode {
    font-size: 1.5rem;
    font-weight: 600;
    color: #3b82f6;
    text-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
    letter-spacing: 2px;
}

/* Hold Timer - Minimalist (hidden by default) */
.hold-timer-minimal {
    width: 100%;
    max-width: 200px;
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    pointer-events: none;
}

.hold-timer-minimal.active {
    opacity: 1;
    transform: translateY(0);
}

.timer-bar {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: var(--spacing-xs);
}

.timer-fill {
    height: 100%;
    width: 0%;
    background: var(--color-primary);
    border-radius: 3px;
    transition: width 0.05s linear;
}

.timer-text {
    text-align: center;
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Reference Section - Smaller Visual Guide */
.guide-body {
    overflow: visible; /* No scrolling - show hover preview */
    padding: var(--spacing-xs);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.guide-panel .panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-hint {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    font-weight: 500;
    font-style: italic;
    opacity: 0.7;
}

.reference-section {
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: visible; /* Allow hover preview to extend beyond */
}

.reference-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    flex-shrink: 0;
}

.reference-grid {
    display: grid;
    grid-template-columns: repeat(13, 1fr); /* 13 columns = 2 rows for 26 letters */
    gap: 3px; /* Smaller gap */
    flex: 1;
    overflow: visible; /* Allow hover preview to extend beyond */
    align-content: start; /* Align to top */
}

/* Responsive reference grid */
@media (max-width: 1024px) {
    .reference-grid {
        grid-template-columns: repeat(10, 1fr);
        gap: 4px;
    }
}

@media (max-width: 768px) {
    .reference-grid {
        grid-template-columns: repeat(8, 1fr);
        gap: 5px;
    }
}

@media (max-width: 480px) {
    .reference-grid {
        grid-template-columns: repeat(6, 1fr);
        gap: 4px;
    }
}

/* Reference Card - Smaller, more compact */
.reference-card {
    position: relative; /* For trained indicator AND hover preview */
    padding: 2px; /* Even smaller padding */
    background: var(--color-surface);
    border: 1.5px solid var(--glass-border);
    border-radius: 6px;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    aspect-ratio: 1; /* Square cards */
    min-height: 24px; /* Smaller for compact layout */
    cursor: pointer;
    font-size: 10px; /* Smaller font */
    z-index: 1; /* Base z-index */
}

/* Touch-friendly on mobile */
@media (max-width: 768px) {
    .reference-card {
        min-height: 28px;
        padding: 2px;
        border-radius: 4px;
    }
}

/* Hover image preview - Show on LEFT side to avoid clipping */
.reference-card::before {
    content: '';
    position: absolute;
    right: 100%; /* Position to the LEFT of the card */
    top: 50%;
    transform: translateY(-50%) translateX(-8px); /* Center vertically, gap from card */
    width: 180px;
    height: 180px;
    background-image: var(--hover-image);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    z-index: 1000; /* Very high z-index to appear above everything */
    border: 3px solid var(--color-primary);
}

.reference-card:hover::before {
    opacity: 1;
}

/* Set background images for each letter - supports both .jpg and .png */
.reference-card[data-letter="A"] { --hover-image: url('/assets/ui/sign-guide/Letter_A_Guide.jpg'), url('/assets/ui/sign-guide/Letter_A_Guide.png'); }
.reference-card[data-letter="B"] { --hover-image: url('/assets/ui/sign-guide/Letter_B_Guide.jpg'), url('/assets/ui/sign-guide/Letter_B_Guide.png'); }
.reference-card[data-letter="C"] { --hover-image: url('/assets/ui/sign-guide/Letter_C_Guide.jpg'), url('/assets/ui/sign-guide/Letter_C_Guide.png'); }
.reference-card[data-letter="D"] { --hover-image: url('/assets/ui/sign-guide/Letter_D_Guide.jpg'), url('/assets/ui/sign-guide/Letter_D_Guide.png'); }
.reference-card[data-letter="E"] { --hover-image: url('/assets/ui/sign-guide/Letter_E_Guide.jpg'), url('/assets/ui/sign-guide/Letter_E_Guide.png'); }
.reference-card[data-letter="F"] { --hover-image: url('/assets/ui/sign-guide/Letter_F_Guide.jpg'), url('/assets/ui/sign-guide/Letter_F_Guide.png'); }
.reference-card[data-letter="G"] { --hover-image: url('/assets/ui/sign-guide/Letter_G_Guide.jpg'), url('/assets/ui/sign-guide/Letter_G_Guide.png'); }
.reference-card[data-letter="H"] { --hover-image: url('/assets/ui/sign-guide/Letter_H_Guide.jpg'), url('/assets/ui/sign-guide/Letter_H_Guide.png'); }
.reference-card[data-letter="I"] { --hover-image: url('/assets/ui/sign-guide/Letter_I_Guide.jpg'), url('/assets/ui/sign-guide/Letter_I_Guide.png'); }
.reference-card[data-letter="J"] { --hover-image: url('/assets/ui/sign-guide/Letter_J_Guide.jpg'), url('/assets/ui/sign-guide/Letter_J_Guide.png'); }
.reference-card[data-letter="K"] { --hover-image: url('/assets/ui/sign-guide/Letter_K_Guide.jpg'), url('/assets/ui/sign-guide/Letter_K_Guide.png'); }
.reference-card[data-letter="L"] { --hover-image: url('/assets/ui/sign-guide/Letter_L_Guide.jpg'), url('/assets/ui/sign-guide/Letter_L_Guide.png'); }
.reference-card[data-letter="M"] { --hover-image: url('/assets/ui/sign-guide/Letter_M_Guide.jpg'), url('/assets/ui/sign-guide/Letter_M_Guide.png'); }
.reference-card[data-letter="N"] { --hover-image: url('/assets/ui/sign-guide/Letter_N_Guide.jpg'), url('/assets/ui/sign-guide/Letter_N_Guide.png'); }
.reference-card[data-letter="O"] { --hover-image: url('/assets/ui/sign-guide/Letter_O_Guide.jpg'), url('/assets/ui/sign-guide/Letter_O_Guide.png'); }
.reference-card[data-letter="P"] { --hover-image: url('/assets/ui/sign-guide/Letter_P_Guide.jpg'), url('/assets/ui/sign-guide/Letter_P_Guide.png'); }
.reference-card[data-letter="Q"] { --hover-image: url('/assets/ui/sign-guide/Letter_Q_Guide.jpg'), url('/assets/ui/sign-guide/Letter_Q_Guide.png'); }
.reference-card[data-letter="R"] { --hover-image: url('/assets/ui/sign-guide/Letter_R_Guide.jpg'), url('/assets/ui/sign-guide/Letter_R_Guide.png'); }
.reference-card[data-letter="S"] { --hover-image: url('/assets/ui/sign-guide/Letter_S_Guide.jpg'), url('/assets/ui/sign-guide/Letter_S_Guide.png'); }
.reference-card[data-letter="T"] { --hover-image: url('/assets/ui/sign-guide/Letter_T_Guide.jpg'), url('/assets/ui/sign-guide/Letter_T_Guide.png'); }
.reference-card[data-letter="U"] { --hover-image: url('/assets/ui/sign-guide/Letter_U_Guide.jpg'), url('/assets/ui/sign-guide/Letter_U_Guide.png'); }
.reference-card[data-letter="V"] { --hover-image: url('/assets/ui/sign-guide/Letter_V_Guide.jpg'), url('/assets/ui/sign-guide/Letter_V_Guide.png'); }
.reference-card[data-letter="W"] { --hover-image: url('/assets/ui/sign-guide/Letter_W_Guide.jpg'), url('/assets/ui/sign-guide/Letter_W_Guide.png'); }
.reference-card[data-letter="X"] { --hover-image: url('/assets/ui/sign-guide/Letter_X_Guide.jpg'), url('/assets/ui/sign-guide/Letter_X_Guide.png'); }
.reference-card[data-letter="Y"] { --hover-image: url('/assets/ui/sign-guide/Letter_Y_Guide.jpg'), url('/assets/ui/sign-guide/Letter_Y_Guide.png'); }
.reference-card[data-letter="Z"] { --hover-image: url('/assets/ui/sign-guide/Letter_Z_Guide.jpg'), url('/assets/ui/sign-guide/Letter_Z_Guide.png'); }

.reference-card:hover {
    border-color: var(--color-primary);
    transform: scale(1.05);
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.2);
    z-index: 2000; /* Bring hovered card AND its preview to the very front */
}

.reference-card.active {
    border-color: var(--color-primary);
    background: rgba(16, 185, 129, 0.1);
    box-shadow: 0 0 0 1.5px var(--color-primary);
}

.reference-letter {
    font-size: clamp(12px, 1.5vw, 16px); /* Responsive font size */
    font-weight: 700;
    color: var(--color-primary);
    text-align: center;
}

/* Trained indicator - smaller */
.reference-card[data-trained="true"]::after {
    content: '\2713';
    position: absolute;
    top: 0px;
    right: 0px;
    font-size: 6px;
    font-weight: bold;
    line-height: 1;
    color: #10b981;
    background: rgba(16, 185, 129, 0.2);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: none;
    text-shadow: none;
    filter: none; /* Prevent blur */
    -webkit-backface-visibility: hidden; /* Fix blur on webkit */
    backface-visibility: hidden;
    transform: translateZ(0); /* Force GPU acceleration */
    will-change: transform; /* Optimize rendering */
}

.reference-card {
    position: relative; /* For trained indicator */
}

/* ========================================
   RESPONSIVE STYLES
   ======================================== */

/* Desktop/Laptop */
@media (max-width: 1200px) {
    .detected-letter {
        font-size: 4rem;
    }
    
    .reference-image {
        width: 60px;
        height: 60px;
    }
    
    .reference-letter {
        font-size: var(--font-size-xl);
        width: 35px;
    }
}

/* Tablet */
@media (max-width: 1024px) {
    .detected-letter {
        font-size: 3.5rem;
    }
    
    .reference-grid {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .reference-card {
        flex-direction: column;
        flex: 1;
        min-width: 100px;
    }
    
    .reference-image {
        width: 100%;
        height: auto;
        aspect-ratio: 1;
    }
}

/* Mobile Portrait */
@media (max-width: 768px) {
    .detected-letter.training-mode {
        font-size: clamp(1rem, 3vw, 1.25rem);
    }

    .confidence-value {
        font-size: var(--font-size-base);
    }
    
    .detected-letter-container {
        padding: var(--spacing-md);
    }
    
    .detection-body {
        padding: clamp(0.5rem, 2vw, 1rem);
    }
    
    .hold-timer-minimal {
        max-width: 180px;
    }
    
    .timer-bar {
        height: 5px;
    }
}

/* Mobile Landscape */
@media (max-width: 768px) and (orientation: landscape) {
    .detection-body {
        padding: 0.5rem;
    }
}

/* Extra Small Mobile */
@media (max-width: 374px) {
    .detection-body {
        padding: 0.4rem;
    }
}

/* Hold Timer Styles - Compact */
.hold-timer-container {
    position: relative;
    margin-top: var(--spacing-sm); /* Smaller margin */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.hold-timer-ring {
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.3s ease;
    width: 60px; /* Smaller from 80px */
    height: 60px;
}

.hold-timer-ring.active {
    opacity: 1;
    transform: scale(1);
}

.hold-timer-ring.complete {
    animation: pulse-success 0.3s ease;
}

@keyframes pulse-success {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.hold-timer-ring circle.progress {
    transition: stroke-dashoffset 0.05s linear;
}

.hold-timer-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: var(--font-size-base); /* Smaller */
    font-weight: 700;
    color: var(--color-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    margin-top: -6px; /* Adjust for smaller size */
}

.hold-timer-text.active {
    opacity: 1;
}

.hold-timer-label {
    font-size: 10px; /* Smaller */
    color: var(--color-text-secondary);
    margin-top: 4px; /* Smaller margin */
    text-transform: uppercase;
    letter-spacing: 0.5px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.hold-timer-ring.active ~ .hold-timer-label {
    opacity: 1;
}