/* ============================================================================
   Stegasoo - Main Stylesheet
   ============================================================================ */

/* ----------------------------------------------------------------------------
   CSS Variables
   ---------------------------------------------------------------------------- */
:root {
    --gradient-start: #4a2860;
    --gradient-end: #5570d4;
    --bg-dark-1: #1a1a2e;
    --bg-dark-2: #16213e;
    --bg-dark-3: #0f3460;
    --text-muted: rgba(255, 255, 255, 0.5);
    --border-light: rgba(255, 255, 255, 0.1);
    --overlay-dark: rgba(0, 0, 0, 0.3);
    --overlay-light: rgba(255, 255, 255, 0.05);
    --day-highlight: #E3FF54; /* Bright yellow/green for day of week */
    --header-gold: #fee862; /* Halfway between light straw and 24k gold */
}

/* ----------------------------------------------------------------------------
   Day of Week Highlight - Simple
   ---------------------------------------------------------------------------- */
.day-of-week-highlight {
    color: var(--day-highlight) !important;
    font-weight: 700 !important;
}

/* ----------------------------------------------------------------------------
   Channel Card Icons (About page) - Contrast fix for gradient backgrounds
   ---------------------------------------------------------------------------- */
#channel-keys .card-header i.bi {
    /* Add outline/shadow for visibility on gradient backgrounds */
    filter: drop-shadow(0 0 2px rgba(0, 0, 0, 0.8))
            drop-shadow(0 0 4px rgba(0, 0, 0, 0.5));
}

/* Override green Auto icon to white for better contrast */
#channel-keys .card-header i.bi-gear-fill.text-success {
    color: #ffffff !important;
    filter: drop-shadow(0 0 3px rgba(34, 197, 94, 0.8))
            drop-shadow(0 0 6px rgba(34, 197, 94, 0.5))
            drop-shadow(0 0 2px rgba(0, 0, 0, 0.6));
}

/* ----------------------------------------------------------------------------
   Mode Selection Buttons (Compact)
   ---------------------------------------------------------------------------- */
.mode-btn {
    background: var(--overlay-light);
    border: 2px solid var(--border-light);
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    padding-left: 2.75rem; /* Make room for absolutely positioned radio */
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative; /* For absolute positioning of radio */
}

.mode-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}

.mode-btn.active {
    border-color: var(--gradient-start);
    background: rgba(102, 126, 234, 0.1);
}

.mode-btn .form-check-input {
    position: absolute;
    left: 15px; /* Fixed distance from left edge of card */
    top: 50%;
    transform: translateY(-50%);
    margin: 0;
    flex-shrink: 0;
}

/* Remove ms-2 margin from first icon after radio since radio is now absolute */
.mode-btn > i.bi:first-of-type {
    margin-left: 0 !important;
}

/* Equal-width mode buttons (ignores content length) */
.mode-btn.equal-width {
    flex: 1 1 0;
    min-width: 0;
}

/* ----------------------------------------------------------------------------
   Security Factor Boxes - Matches drop-zone dashed border style
   ---------------------------------------------------------------------------- */
.security-box {
    border: 2px dashed rgba(255, 255, 255, 0.2);
    border-radius: 0.5rem;
    padding: 1rem;
    height: 100%;
}

.mode-info-icon {
    cursor: help;
    opacity: 0.6;
    font-size: 0.85rem;
}

.mode-info-icon:hover {
    opacity: 1;
}

/* ----------------------------------------------------------------------------
   Base Styles
   ---------------------------------------------------------------------------- */
body {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg-dark-1) 0%, var(--bg-dark-2) 50%, var(--bg-dark-3) 100%);
}

/* ----------------------------------------------------------------------------
   Navigation
   ---------------------------------------------------------------------------- */
.navbar {
    background: var(--overlay-dark) !important;
    backdrop-filter: blur(10px);
}

/* ----------------------------------------------------------------------------
   Cards
   ---------------------------------------------------------------------------- */
.card {
    background: var(--overlay-light);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-light);
}

.card-header {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    border-bottom: none;
}

.card-header h5 {
    color: var(--header-gold);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.33);
}

.title-gold {
    color: var(--header-gold);
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.55);
}

/* Two-choice toggle buttons - gradient-matched colors + equal width */
.btn-group .btn-outline-primary,
.btn-group .btn-outline-secondary {
    flex: 1 1 0;
    transition: all 0.2s ease;
}
.btn-group .btn-outline-primary:hover,
.btn-group .btn-outline-secondary:hover {
    background-color: rgba(255, 255, 255, 0.08);
}

/* Channel key highlight pulse */
.channel-highlight {
    animation: channel-pulse 0.4s ease;
}
@keyframes channel-pulse {
    0% { box-shadow: 0 0 0 0 rgba(254, 232, 98, 0); }
    20% { box-shadow: 0 0 9px 1px rgba(254, 232, 98, 0.19); }
    40% { box-shadow: 0 0 9px 1px rgba(254, 232, 98, 0.19); }
    100% { box-shadow: 0 0 0 0 rgba(254, 232, 98, 0); }
}
.btn-group .btn-outline-primary:first-of-type,
.btn-group .btn-outline-secondary:first-of-type {
    color: #6b4d8a;
    border-color: #6b4d8a;
    border-right: 1px dashed rgba(255, 255, 255, 0.2);
}
.btn-group .btn-outline-primary:last-of-type,
.btn-group .btn-outline-secondary:last-of-type {
    color: #4a62a8;
    border-color: #4a62a8;
}
.btn-group .btn-check:checked + .btn-outline-primary:first-of-type,
.btn-group .btn-check:checked + .btn-outline-secondary:first-of-type {
    background-color: #6b4d8a;
    border-color: #6b4d8a;
    color: #fff;
}
.btn-group .btn-check:checked + .btn-outline-primary:last-of-type,
.btn-group .btn-check:checked + .btn-outline-secondary:last-of-type {
    background-color: #4a62a8;
    border-color: #4a62a8;
    color: #fff;
}

/* Override small warning text to use header gold */
.text-warning.small {
    color: var(--header-gold) !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.33);
}

.card-link .card-header.text-center {
    padding-top: 0.5rem !important;
    padding-bottom: 0.5rem !important;
    height: 4.5rem; /* Fixed height to match original */
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(102, 126, 234, 0.2);
}

/* ----------------------------------------------------------------------------
   Buttons
   ---------------------------------------------------------------------------- */
.btn-primary {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--gradient-end), var(--gradient-start));
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

/* ----------------------------------------------------------------------------
   Forms
   ---------------------------------------------------------------------------- */
.form-control,
.form-select {
    background: var(--overlay-light);
    border: 1px solid var(--border-light);
    color: #fff;
}

.form-control:focus,
.form-select:focus {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--gradient-start);
    box-shadow: 0 0 0 0.25rem rgba(102, 126, 234, 0.25);
    color: #fff;
}

.form-control::placeholder {
    color: var(--text-muted);
}

/* Fix dropdown options for dark theme */
.form-select option {
    background: var(--bg-dark-1);
    color: #fff;
}

/* ----------------------------------------------------------------------------
   Hero & Icons
   ---------------------------------------------------------------------------- */
.hero-icon {
    font-size: 4rem;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ----------------------------------------------------------------------------
   Phrase Display
   ---------------------------------------------------------------------------- */
.phrase-display {
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    background: var(--overlay-dark);
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    border-left: 4px solid var(--gradient-start);
    display: inline-block;
    line-height: 1.6;
    word-spacing: 0.3rem;
}

/* ----------------------------------------------------------------------------
   PIN Display
   ---------------------------------------------------------------------------- */
.pin-display {
    font-family: 'Courier New', monospace;
    font-size: 3rem;
    font-weight: bold;
    letter-spacing: 0.75rem;
    background: linear-gradient(135deg, #fef08a, #fcd34d, #fb923c);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    line-height: 1;
}

.pin-container {
    background: var(--overlay-dark);
    border: 1px solid var(--border-light);
    border-radius: 0.75rem;
    padding: 1.5rem 2rem;
    display: inline-block;
}

/* ----------------------------------------------------------------------------
   Story Cards (Memory Aid)
   ---------------------------------------------------------------------------- */
.story-word {
    color: #ff6b6b;
    font-weight: bold;
    text-transform: uppercase;
}

.story-card {
    background: rgba(0, 0, 0, 0.2);
    border-left: 3px solid var(--gradient-start);
    padding: 1rem;
    margin-bottom: 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.95rem;
    line-height: 1.6;
}

.story-card .day-label {
    font-weight: bold;
    color: var(--gradient-start);
    margin-bottom: 0.5rem;
}

/* ----------------------------------------------------------------------------
   Alert / Message Display
   ---------------------------------------------------------------------------- */
.alert-message {
    background: var(--overlay-dark);
    border: 1px solid var(--border-light);
    border-radius: 0.5rem;
    padding: 1.5rem;
    white-space: pre-wrap;
    font-family: 'Courier New', monospace;
}

/* ----------------------------------------------------------------------------
   Drop Zone (Drag & Drop File Upload)
   ---------------------------------------------------------------------------- */
.drop-zone {
    position: relative;
    border: 2px dashed rgba(255, 255, 255, 0.2);
    border-radius: 0.5rem;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.2s ease;
}

.drop-zone.drag-over {
    border-color: var(--gradient-start);
    background: rgba(102, 126, 234, 0.1);
}

.drop-zone input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.drop-zone-label {
    pointer-events: none;
}

.drop-zone-preview {
    max-height: 120px;
    border-radius: 0.375rem;
    margin-top: 0.75rem;
}

/* ----------------------------------------------------------------------------
   Footer
   ---------------------------------------------------------------------------- */
footer {
    background: rgba(0, 0, 0, 0.2);
}

/* ----------------------------------------------------------------------------
   Custom Alert Variants
   ---------------------------------------------------------------------------- */
.alert-success-bright {
    background: rgba(34, 197, 94, 0.2);
    border-color: #22c55e;
    color: #4ade80;
}

/* ----------------------------------------------------------------------------
   Utility Classes
   ---------------------------------------------------------------------------- */
.bg-dark-subtle {
    background: rgba(0, 0, 0, 0.2);
}

.status-box {
    background: rgba(0, 0, 0, 0.2);
    padding: 1rem;
    border-radius: 0.5rem;
}

.result-icon {
    font-size: 4rem;
}

.footer-icon {
    vertical-align: text-bottom;
}

/* ----------------------------------------------------------------------------
   Card Stuff Icons 
   ---------------------------------------------------------------------------- */
.action-card {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.action-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1) !important;
}

.feature-card {
    border-radius: 10px;
    overflow: hidden;
}

/* Ensure buttons are easily tappable on mobile */
@media (max-width: 768px) {
    .btn-lg {
        padding: 1rem 1.5rem;
        font-size: 1.1rem;
    }
    
    .card {
        margin-bottom: 1rem;
    }
}

/* ----------------------------------------------------------------------------
   Dramatic Gold Glow Hover Effect
   ---------------------------------------------------------------------------- */
.embossed-icon {
    color: #f8f8f8 !important;
    text-shadow: 
        /* Subtle emboss only by default */
        0 0.5px 0 rgba(255, 255, 255, 0.4),     /* Soft top highlight */
        0 -0.5px 0 rgba(0, 0, 0, 0.15),         /* Very soft bottom shadow */
        0 1px 2px rgba(0, 0, 0, 0.1);           /* Minimal drop shadow */
    
    position: relative;
    display: inline-block;
    transition: all 0.3s ease;
    font-size: 3.5rem !important;
    line-height: 1;
    padding: 10px 0;
}

.card-link:hover .embossed-icon {
    color: #ffffff !important;
    text-shadow: 
        /* GOLD GLOW LAYERS - Only on hover */
        0 0 10px rgba(255, 215, 0, 0.5),        /* Soft inner glow */
        0 0 20px rgba(255, 215, 0, 0.3),        /* Medium glow */
        0 0 30px rgba(255, 215, 0, 0.2),        /* Outer glow */
        0 0 40px rgba(255, 215, 0, 0.1),        /* Far outer glow */
        
        /* Enhanced emboss on hover */
        0 1px 0 rgba(255, 255, 255, 0.8),       /* Bright top highlight */
        0 -1px 0 rgba(0, 0, 0, 0.25),           /* Deeper bottom shadow */
        0 2px 4px rgba(0, 0, 0, 0.15),          /* Soft drop shadow */
        
        /* Gold accent shadows */
        0 1px 2px rgba(255, 215, 0, 0.3),       /* Gold highlight layer */
        0 -1px 1px rgba(255, 215, 0, 0.15);     /* Gold shadow layer */
    
    filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.25));
    transform: scale(1.02); /* Slight grow on hover */
}

/* Card header adjustments for dramatic effect */
.card-link .card-header.text-center {
    padding-top: 1.25rem !important;
    padding-bottom: 1.25rem !important;
    min-height: 6.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: all 0.3s ease;
}

/* Enhance the gradient on hover for dramatic effect */
.card-link:hover .card-header.text-center {
    background: linear-gradient(135deg,
        #3d2050 0%,
        var(--gradient-start) 30%,
        var(--gradient-end) 70%,
        #6680e0 100%);
    box-shadow: inset 0 0 20px rgba(255, 215, 0, 0.1);
}

/* Mobile adjustments */
@media (max-width: 768px) {
    .embossed-icon {
        font-size: 2.8rem !important;
        padding: 8px 0;
    }
    
    .card-link:hover .embossed-icon {
        transform: scale(1.01);
    }
    
    .card-link .card-header.text-center {
        padding-top: 1rem !important;
        padding-bottom: 1rem !important;
        min-height: 5.5rem;
    }
}

/* ----------------------------------------------------------------------------
   Card Links
   ---------------------------------------------------------------------------- */
.card-link {
    text-decoration: none;
    color: inherit;
    display: block;
    height: 100%;
}

.card-link:hover {
    color: inherit;
}

/* Optional: Add a slight scale effect to the entire card on hover */
.card-link .feature-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card-link:hover .feature-card {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(74, 40, 96, 0.4);
}

/* ----------------------------------------------------------------------------
   Reference Photo Scan Animation
   ---------------------------------------------------------------------------- */
.scan-container {
    position: relative;
    overflow: hidden;
}

.scan-container .drop-zone-preview {
    position: relative;
    z-index: 1;
    margin-bottom: 45px;
}

.scan-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 2;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.scan-container.scanning .scan-overlay {
    opacity: 1;
}

/* Scan line that moves down */
.scan-line {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(0, 255, 170, 0.4) 20%, 
        rgba(0, 255, 170, 1) 50%, 
        rgba(0, 255, 170, 0.4) 80%, 
        transparent 100%
    );
    box-shadow: 0 0 10px rgba(0, 255, 170, 0.6), 0 0 20px rgba(0, 255, 170, 0.3);
    opacity: 0;
}

.scan-container.scanning .scan-line {
    opacity: 1;
    animation: scanDown 0.7s ease-out forwards;
}

@keyframes scanDown {
    0% { top: 0; opacity: 1; }
    100% { top: 100%; opacity: 0; }
}

/* Grid overlay - subtle */
.scan-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(0, 255, 170, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 170, 0.03) 1px, transparent 1px);
    background-size: 8px 8px;
    opacity: 0;
}

.scan-container.scanning .scan-grid {
    opacity: 0.5;
}

/* Hash blocks container - masked to image, positioned over it */
.hash-blocks {
    position: absolute;
    z-index: 3;
    pointer-events: none;
    overflow: hidden;
    border-radius: 0.375rem;
    display: grid;
    gap: 2px;
}

.hash-block {
    background: rgba(0, 255, 170, 0.6);
    border-radius: 1px;
    box-shadow: 0 0 4px rgba(0, 255, 170, 0.5);
    opacity: 0;
}

/* Hash blocks fade in then out one by one */
.scan-container.scanning .hash-block {
    animation: hashBlockPulse 0.7s ease-in-out forwards;
}

@keyframes hashBlockPulse {
    0% { 
        opacity: 0;
        transform: scale(0.8);
    }
    15% {
        opacity: 0.7;
        transform: scale(1);
        background: rgba(0, 255, 170, 0.6);
    }
    40% {
        opacity: 0.8;
        background: rgba(0, 255, 170, 0.7);
        box-shadow: 0 0 6px rgba(0, 255, 170, 0.6);
    }
    70% {
        opacity: 0.6;
        transform: scale(1);
    }
    100% { 
        opacity: 0;
        transform: scale(0.5);
    }
}

/* Corner brackets - hidden during scan, shown after */
.scan-corners {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.scan-corner {
    position: absolute;
    width: 16px;
    height: 16px;
    border-color: rgba(0, 255, 170, 0.8);
    border-style: solid;
    border-width: 0;
}

.scan-corner.tl { top: 4px; left: 4px; border-top-width: 2px; border-left-width: 2px; }
.scan-corner.tr { top: 4px; right: 4px; border-top-width: 2px; border-right-width: 2px; }
.scan-corner.bl { bottom: 4px; left: 4px; border-bottom-width: 2px; border-left-width: 2px; }
.scan-corner.br { bottom: 4px; right: 4px; border-bottom-width: 2px; border-right-width: 2px; }

/* Scan complete state */
.scan-container.scan-complete .scan-overlay {
    opacity: 0;
}

.scan-container.scan-complete .scan-corners {
    opacity: 1;
}

.scan-container.scan-complete .drop-zone-preview {
    animation: scanPop 0.3s ease-out;
}

@keyframes scanPop {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); }
    100% { transform: scale(1); }
}

/* Data panel that appears after scan */
.scan-data-panel {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 3;
    background: linear-gradient(to top, 
        rgba(10, 15, 30, 0.98) 0%, 
        rgba(12, 20, 40, 0.9) 50%, 
        rgba(15, 25, 50, 0.6) 75%, 
        transparent 100%);
    padding: 35px 10px 8px 10px;
    opacity: 0;
    transform: translateY(4px);
    transition: opacity 0.4s ease, transform 0.4s ease;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

.scan-container.scan-complete .scan-data-panel {
    opacity: 1;
    transform: translateY(0);
}

.scan-data-filename {
    font-family: 'Courier New', monospace;
    font-size: 0.7rem;
    color: #fff;
    text-align: center;
    margin-bottom: 5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.scan-data-filename i {
    color: rgba(0, 255, 170, 1);
    margin-right: 4px;
}

.scan-data-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: 'Courier New', monospace;
    font-size: 0.6rem;
    color: rgba(0, 255, 170, 0.9);
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.scan-data-label {
    color: rgba(255, 255, 255, 0.5);
    text-transform: uppercase;
    font-size: 0.55rem;
}

.scan-data-value {
    color: rgba(0, 255, 170, 1);
    font-weight: 600;
    font-size: 0.65rem;
}

.scan-hash-preview {
    font-family: 'Courier New', monospace;
    font-size: 0.55rem;
    color: rgba(0, 255, 170, 0.6);
    letter-spacing: 0.5px;
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.scan-status-badge {
    display: inline-flex;
    align-items: center;
    background: rgba(0, 255, 170, 0.15);
    border: 1px solid rgba(0, 255, 170, 0.4);
    border-radius: 3px;
    padding: 2px 6px;
    font-size: 0.65rem;
    color: rgba(0, 255, 170, 1);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    line-height: 1;
}

/* ----------------------------------------------------------------------------
   Carrier/Stego Embed Animation - Hidden data threads
   ---------------------------------------------------------------------------- */
.pixel-container {
    position: relative;
    overflow: hidden;
}

.pixel-container .drop-zone-preview {
    position: relative;
    z-index: 1;
    margin-bottom: 45px;
}

/* Scan line effect - smooth single pass */
.pixel-scan-line {
    position: absolute;
    left: 0;
    right: 0;
    height: 2px;
    top: 0;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(212, 225, 87, 0.4) 20%, 
        rgba(212, 225, 87, 1) 50%, 
        rgba(212, 225, 87, 0.4) 80%, 
        transparent 100%
    );
    box-shadow: 0 0 10px rgba(212, 225, 87, 0.6), 0 0 20px rgba(212, 225, 87, 0.3);
    opacity: 0;
    z-index: 5;
    pointer-events: none;
}

.pixel-container.loading .pixel-scan-line {
    opacity: 1;
    animation: embedScanDown 0.7s ease-out forwards;
}

@keyframes embedScanDown {
    0% { top: 0; opacity: 1; }
    100% { top: calc(100% - 45px); opacity: 0; }
}

/* Grid overlay - matches reference scan-grid exactly */
.embed-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 3;
    pointer-events: none;
    background-image: 
        linear-gradient(rgba(0, 255, 170, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 170, 0.03) 1px, transparent 1px);
    background-size: 8px 8px;
    opacity: 0;
}

.pixel-container.loading .embed-grid {
    opacity: 0.5;
}

/* Tron-style circuit traces container - masked to image */
.embed-traces {
    position: absolute;
    z-index: 4;
    pointer-events: none;
    overflow: hidden;
    border-radius: 0.375rem;
}

.embed-trace {
    position: absolute;
    border-radius: 1px;
    opacity: 0;
}

/* Color variants - 60% opacity */
.embed-trace.color-yellow {
    background: rgba(212, 225, 87, 0.6);
    box-shadow: 0 0 6px rgba(212, 225, 87, 0.5), 0 0 12px rgba(212, 225, 87, 0.3);
}

.embed-trace.color-cyan {
    background: rgba(0, 255, 170, 0.6);
    box-shadow: 0 0 6px rgba(0, 255, 170, 0.5), 0 0 12px rgba(0, 255, 170, 0.3);
}

.embed-trace.color-purple {
    background: rgba(167, 139, 250, 0.6);
    box-shadow: 0 0 6px rgba(167, 139, 250, 0.5), 0 0 12px rgba(167, 139, 250, 0.3);
}

.embed-trace.color-blue {
    background: rgba(102, 126, 234, 0.6);
    box-shadow: 0 0 6px rgba(102, 126, 234, 0.5), 0 0 12px rgba(102, 126, 234, 0.3);
}

/* Vertical segments shrink from top */
.embed-trace.v {
    width: 2px;
    transform-origin: top center;
}

/* Horizontal segments shrink from left */
.embed-trace.h {
    height: 2px;
    transform-origin: left center;
}

/* Animation - appear, glow, shrink away completely */
.pixel-container.loading .embed-trace.h {
    animation: traceHShrink 0.65s ease-in-out forwards;
}

.pixel-container.loading .embed-trace.v {
    animation: traceVShrink 0.65s ease-in-out forwards;
}

@keyframes traceHShrink {
    0% { 
        transform: scaleX(0);
        opacity: 0;
    }
    15% {
        transform: scaleX(1);
        opacity: 1;
    }
    40% { 
        transform: scaleX(1);
        opacity: 1;
    }
    100% { 
        transform: scaleX(0);
        opacity: 0;
    }
}

@keyframes traceVShrink {
    0% { 
        transform: scaleY(0);
        opacity: 0;
    }
    15% {
        transform: scaleY(1);
        opacity: 1;
    }
    40% { 
        transform: scaleY(1);
        opacity: 1;
    }
    100% { 
        transform: scaleY(0);
        opacity: 0;
    }
}

/* Ensure traces are gone after animation */
.pixel-container.load-complete .embed-traces {
    display: none;
}

/* Corner brackets for pixel container - purple/blue theme */
.pixel-corners {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.pixel-corner {
    position: absolute;
    width: 16px;
    height: 16px;
    border-color: rgba(212, 225, 87, 0.8);
    border-style: solid;
    border-width: 0;
}

.pixel-corner.tl { top: 4px; left: 4px; border-top-width: 2px; border-left-width: 2px; }
.pixel-corner.tr { top: 4px; right: 4px; border-top-width: 2px; border-right-width: 2px; }
.pixel-corner.bl { bottom: 4px; left: 4px; border-bottom-width: 2px; border-left-width: 2px; }
.pixel-corner.br { bottom: 4px; right: 4px; border-bottom-width: 2px; border-right-width: 2px; }

.pixel-container.load-complete .pixel-corners {
    opacity: 1;
}

/* Data panel for pixel container - purple/blue theme */
.pixel-data-panel {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 3;
    background: linear-gradient(to top, 
        rgba(10, 15, 30, 0.98) 0%, 
        rgba(12, 20, 40, 0.9) 50%, 
        rgba(15, 25, 50, 0.6) 75%, 
        transparent 100%);
    padding: 35px 10px 8px 10px;
    opacity: 0;
    transform: translateY(4px);
    transition: opacity 0.4s ease, transform 0.4s ease;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

.pixel-container.load-complete .pixel-data-panel {
    opacity: 1;
    transform: translateY(0);
}

.pixel-data-filename {
    font-family: 'Courier New', monospace;
    font-size: 0.7rem;
    color: #fff;
    text-align: center;
    margin-bottom: 5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.pixel-data-filename i {
    color: #d4e157;
    margin-right: 4px;
}

.pixel-data-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: 'Courier New', monospace;
    font-size: 0.6rem;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.pixel-data-value {
    color: #d4e157;
    font-weight: 600;
    font-size: 0.65rem;
}

.pixel-status-badge {
    display: inline-flex;
    align-items: center;
    background: rgba(212, 225, 87, 0.15);
    border: 1px solid rgba(212, 225, 87, 0.4);
    border-radius: 3px;
    padding: 2px 6px;
    font-size: 0.65rem;
    color: #d4e157;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    line-height: 1;
}

.pixel-dimensions {
    font-family: 'Courier New', monospace;
    font-size: 0.55rem;
    color: rgba(212, 225, 87, 0.7);
    letter-spacing: 0.5px;
    text-align: center;
}

/* ----------------------------------------------------------------------------
   QR Code Section - Square Inner Panel Layout
   ---------------------------------------------------------------------------- */
#rsaQrSection {
    display: flex;
    justify-content: center;
}

#rsaQrSection .drop-zone {
    width: 200px;
    height: 200px;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    transition: all 0.3s ease;
}

/* Expand drop zone when showing scanned QR result */
#rsaQrSection .drop-zone:has(.qr-scan-container:not(.d-none)) {
    width: auto;
    min-width: 280px;
    max-width: 400px;
    height: auto;
    min-height: 280px;
    aspect-ratio: auto;
}

#rsaQrSection .drop-zone-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
}

/* ----------------------------------------------------------------------------
   QR Code Section Scan Animation - Simplified: Loading → Scan → Complete
   ---------------------------------------------------------------------------- */
.qr-scan-container {
    position: relative;
    overflow: visible;
    border-radius: 8px;
    background: rgba(0, 0, 0, 0.3);
    min-height: 220px;
    min-width: 220px;
    padding: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.qr-scan-container img {
    display: block;
    margin: 0 auto;
}

/* Hide original image - we don't use it anymore */
.qr-scan-container .qr-original {
    display: none;
}

/* Cropped image - hidden until loaded, scales UP to fill container */
.qr-scan-container .qr-cropped {
    max-height: 240px;
    max-width: 240px;
    min-width: 180px;
    min-height: 180px;
    width: auto;
    height: auto;
    object-fit: contain;
    display: none;
    border-radius: 6px;
}

/* ===========================================
   PHASE 1: Loading - spinner while cropping
   =========================================== */
.qr-loader {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: rgba(0, 255, 170, 0.9);
    padding: 30px 20px;
    width: 100%;
}

.qr-loader i {
    font-size: 2.5rem;
    animation: qrLoaderPulse 1.5s ease-in-out infinite;
}

.qr-loader span {
    font-family: 'Courier New', monospace;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    opacity: 0.8;
}

@keyframes qrLoaderPulse {
    0%, 100% { opacity: 0.5; transform: scale(0.95); }
    50% { opacity: 1; transform: scale(1.05); }
}

.qr-scan-container.loading .qr-loader {
    display: flex;
}

/* Error state */
.qr-scan-container.error .qr-loader {
    display: flex;
    color: #fbbf24;
}

.qr-scan-container.error .qr-loader i {
    animation: none;
}

/* ===========================================
   PHASE 2: Scanning - cropped QR with brackets
   =========================================== */
.qr-scan-container.scanning .qr-cropped,
.qr-scan-container.scan-complete .qr-cropped {
    display: block;
}

/* Scanner overlay - covers the container, padded to match image area */
.qr-scanner-overlay {
    position: absolute;
    inset: 10px;
    pointer-events: none;
    z-index: 5;
    border-radius: 6px;
    overflow: visible;
}

/* Four corner finder brackets */
.qr-finder-bracket {
    position: absolute;
    width: 18px;
    height: 18px;
    border-color: rgba(0, 255, 170, 0.9);
    border-style: solid;
    border-width: 0;
    opacity: 0;
    transition: all 0.3s ease;
}

.qr-finder-bracket.tl { top: 0; left: 0; border-top-width: 3px; border-left-width: 3px; }
.qr-finder-bracket.tr { top: 0; right: 0; border-top-width: 3px; border-right-width: 3px; }
.qr-finder-bracket.bl { bottom: 0; left: 0; border-bottom-width: 3px; border-left-width: 3px; }
.qr-finder-bracket.br { bottom: 0; right: 0; border-bottom-width: 3px; border-right-width: 3px; }

/* Scanning state - brackets pulse */
.qr-scan-container.scanning .qr-finder-bracket {
    opacity: 1;
    box-shadow: 0 0 8px rgba(0, 255, 170, 0.6);
    animation: bracketPulse 1s ease-in-out infinite;
}

.qr-scan-container.scanning .qr-finder-bracket.tl { animation-delay: 0s; }
.qr-scan-container.scanning .qr-finder-bracket.tr { animation-delay: 0.15s; }
.qr-scan-container.scanning .qr-finder-bracket.br { animation-delay: 0.3s; }
.qr-scan-container.scanning .qr-finder-bracket.bl { animation-delay: 0.45s; }

@keyframes bracketPulse {
    0%, 100% { opacity: 0.6; border-color: rgba(0, 255, 170, 0.6); box-shadow: 0 0 4px rgba(0, 255, 170, 0.4); }
    50% { opacity: 1; border-color: rgba(0, 255, 170, 1); box-shadow: 0 0 12px rgba(0, 255, 170, 0.8); }
}

/* Scan line during scanning phase */
.qr-scan-container.scanning .qr-scanner-overlay::before {
    content: '';
    position: absolute;
    left: 2px;
    right: 2px;
    height: 2px;
    top: 2px;
    z-index: 6;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(0, 255, 170, 0.5) 20%, 
        rgba(0, 255, 170, 1) 50%, 
        rgba(0, 255, 170, 0.5) 80%, 
        transparent 100%
    );
    box-shadow: 0 0 8px rgba(0, 255, 170, 0.8);
    animation: qrScanLine 1s ease-in-out infinite;
}

@keyframes qrScanLine {
    0% { top: 2px; opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { top: calc(100% - 2px); opacity: 0; }
}

/* Grid overlay during scanning */
.qr-scan-container.scanning .qr-scanner-overlay::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: 
        linear-gradient(rgba(0, 255, 170, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 170, 0.03) 1px, transparent 1px);
    background-size: 6px 6px;
    opacity: 0.5;
    z-index: 4;
}

/* ===========================================
   PHASE 3: Complete - brackets lock solid
   =========================================== */
.qr-scan-container.scan-complete .qr-finder-bracket {
    opacity: 1;
    border-color: rgba(0, 255, 170, 1);
    box-shadow: 0 0 8px rgba(0, 255, 170, 0.6);
    animation: none;
}

/* Data panel at bottom of overlay (relative to image) */
.qr-scanner-overlay .qr-data-panel {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 10;
    background: linear-gradient(to top,
        rgba(10, 15, 30, 0.95) 0%,
        rgba(10, 15, 30, 0.6) 80%,
        transparent 100%);
    padding: 8px 10px 6px 10px;
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: 0 0 6px 6px;
}

.qr-scan-container.scan-complete .qr-data-panel {
    opacity: 1;
}

/* Hide the static data panel in HTML */
.qr-scan-container > .qr-data-panel {
    display: none;
}

/* Hide elements we don't use */
.qr-scan-container .crop-badge {
    display: none;
}

/* QR Data Panel text styles */
.qr-data-filename {
    font-family: 'Courier New', monospace;
    font-size: 0.7rem;
    color: #fff;
    text-align: center;
    margin-bottom: 3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.qr-data-filename i {
    color: rgba(0, 255, 170, 1);
    margin-right: 3px;
}

.qr-data-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: 'Courier New', monospace;
    font-size: 0.6rem;
    white-space: nowrap;
}

.qr-status-badge {
    display: inline-flex;
    align-items: center;
    background: rgba(0, 255, 170, 0.15);
    border: 1px solid rgba(0, 255, 170, 0.4);
    border-radius: 3px;
    padding: 2px 6px;
    font-size: 0.65rem;
    color: rgba(0, 255, 170, 1);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.qr-data-value {
    color: rgba(0, 255, 170, 1);
    font-weight: 600;
    font-size: 0.65rem;
}

/* ----------------------------------------------------------------------------
   LED Indicator
   ---------------------------------------------------------------------------- */
.led-indicator {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    vertical-align: middle;
}

.led-yellow {
    background: #fbbf24;
    box-shadow: 0 0 3px #fbbf24, 0 0 6px rgba(251, 191, 36, 0.4);
}

.led-green {
    background: #22c55e;
    box-shadow: 0 0 3px #22c55e, 0 0 6px rgba(34, 197, 94, 0.4);
}

.led-red {
    background: #ef4444;
    box-shadow: 0 0 3px #ef4444, 0 0 6px rgba(239, 68, 68, 0.4);
}

/* LED Badge backgrounds */
.led-badge-yellow {
    background: rgba(251, 191, 36, 0.2);
    border: 1px solid rgba(251, 191, 36, 0.4);
    color: #fbbf24;
}

.led-badge-green {
    background: rgba(34, 197, 94, 0.2);
    border: 1px solid rgba(34, 197, 94, 0.4);
    color: #22c55e;
}

.led-badge-red {
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid rgba(239, 68, 68, 0.4);
    color: #ef4444;
}

/* Key capsule container */
.key-capsule {
    display: inline-flex;
    align-items: center;
    border: 1px dashed rgba(255, 255, 255, 0.3);
    border-radius: 0.375rem;
    padding: 0.35rem 0.75rem;
    background: rgba(0, 0, 0, 0.1);
}

/* ============================================================================
   MOBILE RESPONSIVE IMPROVEMENTS
   ============================================================================ */

/* Mobile-specific drop zone improvements */
@media (max-width: 768px) {
    /* Larger drop zones on mobile for easier touch targets */
    .drop-zone {
        padding: 2rem 1.5rem;
        min-height: 140px;
    }

    /* Larger touch target for upload icons */
    .drop-zone-label i {
        font-size: 2.5rem !important;
    }

    /* Touch feedback - active state */
    .drop-zone:active {
        border-color: var(--gradient-start);
        background: rgba(102, 126, 234, 0.15);
        transform: scale(0.98);
    }

    /* Mode buttons - stack vertically on very small screens */
    .d-flex.gap-2:has(.mode-btn) {
        flex-direction: column;
    }

    .mode-btn {
        padding: 1rem;
        min-height: 56px; /* iOS touch target minimum */
    }

    /* Full-width primary buttons */
    .btn-primary.btn-lg {
        padding: 1rem 1.5rem;
        font-size: 1.1rem;
        min-height: 56px;
    }

    /* Security factor boxes - more padding for touch */
    .security-box {
        padding: 1.25rem;
    }

    /* Form controls - larger for touch */
    .form-control,
    .form-select {
        padding: 0.75rem 1rem;
        font-size: 1rem;
        min-height: 48px;
    }

    /* Input groups - consistent sizing */
    .input-group .form-control {
        min-height: 48px;
    }

    .input-group .btn {
        min-width: 48px;
        padding: 0.75rem;
    }

    /* Password toggle button - easier to tap */
    [data-toggle-password] {
        min-width: 52px;
    }

    /* PIN input - larger on mobile */
    .pin-input-container .form-control {
        font-size: 1.4rem;
        letter-spacing: 4px;
        padding: 0.875rem 1rem;
    }

    /* Passphrase input - comfortable mobile size */
    .passphrase-input {
        font-size: 1rem !important;
        padding: 0.875rem 1rem !important;
    }

    /* Card headers - compact on mobile */
    .card-header h5 {
        font-size: 1.1rem;
    }

    /* Alert info panel - readable text */
    .alert.small {
        font-size: 0.9rem;
    }

    /* Bottom info icons - larger tap targets */
    .row.text-center .col-4 {
        padding: 0.5rem;
    }

    .row.text-center .col-4 i {
        font-size: 2rem !important;
    }

    /* Capacity panel badges - easier to read */
    #capacityPanel .badge {
        font-size: 0.8rem;
        padding: 0.4rem 0.6rem;
    }

    /* Payload type toggle - full width buttons */
    .btn-group[role="group"] {
        flex-direction: row;
    }

    .btn-group .btn {
        padding: 0.75rem 0.5rem;
        font-size: 0.95rem;
    }

    /* Textarea - comfortable height */
    textarea.form-control {
        min-height: 120px;
    }

    /* Channel select - full width */
    #channelSelect {
        font-size: 1rem;
    }
}

/* Very small screens (iPhone SE, etc.) */
@media (max-width: 375px) {
    .drop-zone {
        padding: 1.5rem 1rem;
    }

    .mode-btn {
        padding: 0.875rem;
        font-size: 0.9rem;
    }

    .mode-btn .text-muted {
        display: none; /* Hide secondary text on tiny screens */
    }

    .card-header h5 {
        font-size: 1rem;
    }

    /* Stack security factor row */
    .row:has(.security-box) > .col-md-6 {
        margin-bottom: 1rem;
    }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
    /* Remove hover effects that don't work on touch */
    .btn-primary:hover {
        transform: none;
    }

    .feature-card:hover {
        transform: none;
    }

    .card-link:hover .feature-card {
        transform: none;
    }

    /* Add active states instead */
    .btn-primary:active {
        transform: scale(0.98);
        box-shadow: 0 2px 10px rgba(102, 126, 234, 0.3);
    }

    .feature-card:active {
        transform: scale(0.98);
    }

    /* Drop zone active feedback */
    .drop-zone:active {
        border-color: var(--gradient-start);
        background: rgba(102, 126, 234, 0.1);
    }

    /* Mode button active state */
    .mode-btn:active {
        background: rgba(255, 255, 255, 0.12);
        border-color: var(--gradient-start);
    }
}

/* Camera hint for mobile - shows on file inputs */
@media (max-width: 768px) {
    .drop-zone-label span.text-muted {
        display: block;
    }

    /* Add camera icon hint on mobile */
    .drop-zone-label::after {
        content: "Tap to take photo or choose file";
        display: block;
        font-size: 0.75rem;
        color: rgba(255, 255, 255, 0.4);
        margin-top: 0.5rem;
    }

    /* Hide the default text and show mobile version */
    .drop-zone-label > span.text-muted {
        display: none;
    }
}

/* Navbar mobile adjustments */
@media (max-width: 768px) {
    .navbar {
        padding: 0.5rem 1rem;
    }

    .navbar-brand img {
        height: 32px;
    }

    /* Sticky header shouldn't eat too much space */
    .navbar.sticky-top {
        position: relative; /* Don't stick on mobile - saves screen space */
    }
}

/* Results page mobile adjustments */
@media (max-width: 768px) {
    /* Download button - full width on mobile */
    .btn-success.btn-lg,
    a.btn-success.btn-lg {
        width: 100%;
        padding: 1rem;
        font-size: 1.1rem;
    }

    /* QR codes - appropriate sizing */
    .qr-scan-container {
        max-width: 280px;
        margin: 0 auto;
    }

    /* Message display - readable on mobile */
    .alert-message {
        font-size: 0.9rem;
        padding: 1rem;
        word-break: break-word;
    }

    /* Result icon - slightly smaller on mobile */
    .result-icon {
        font-size: 3rem;
    }
}
