/* === D.K. CONVERTER VARIABLES === */
:root {
    /* Color Palette */
    --color-bg-primary: #020207; 
    --color-bg-secondary: rgba(15, 15, 25, 0.85); 
    --color-text-primary: #f0f8ff; 
    --color-text-secondary: #9aa7b5; 

    /* Core Accent Colors */
    --color-neon-green: #3fff7d; 
    --color-neon-blue: #55b6ff; 
    --color-accent-dark: #1f5f37;
    
    /* Glass/Border */
    --color-border-green: rgba(63, 255, 125, 0.4); 
    --color-border-blue: rgba(85, 182, 255, 0.4); 

    /* Glow Effects */
    --shadow-glow-green: 0 0 10px var(--color-neon-green), 0 0 35px rgba(63, 255, 125, 0.5); 
    --shadow-glow-blue: 0 0 10px var(--color-neon-blue), 0 0 35px rgba(85, 182, 255, 0.5); 
    
    --font-stack: 'Poppins', sans-serif; 
    --font-header: 'Roboto Mono', monospace; /* Header Font */

    --border-radius-lg: 18px; 
    --border-radius-sm: 8px;
}

/* === SCROLLBAR STYLING === */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--color-bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--color-accent-dark);
    border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-neon-green);
}

body {
    font-family: var(--font-stack);
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    /* subtle, focused background gradients */
    background-image: radial-gradient(circle at 10% 20%, rgba(63, 255, 125, 0.1) 0%, transparent 40%),
                        radial-gradient(circle at 90% 80%, rgba(85, 182, 255, 0.1) 0%, transparent 40%);
    min-height: 100vh;
}

/* === TYPOGRAPHY & HEADERS === */
h1 {
    font-family: var(--font-header); 
    color: var(--color-neon-blue); 
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 3px solid;
    
    /* animated */
    border-image: linear-gradient(to right, transparent 5%, var(--color-neon-green) 40%, var(--color-neon-blue) 60%, transparent 95%) 1;
    
    font-size: 2.8em;
    letter-spacing: 5px; 
    text-shadow: var(--shadow-glow-blue); /* Blue glow */
    font-weight: 700;
    
    /* Neon Flicker Animation */
    animation: neon-flicker-blue 4s infinite alternate ease-in-out;
}

h2 {
    color: var(--color-text-primary);
    font-size: 1.8em;
    margin-top: 40px;
    border-bottom: none;
    padding-bottom: 5px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
}

h3 {
    color: var(--color-neon-green);
    font-size: 1.2em;
    margin-top: 5px;
    font-weight: 600;
}

h5 {
    color: var(--color-text-secondary);
    font-weight: 400;
    font-size: 0.9em;
}

/* === CONTAINER & HOLOGRAPHIC EFFECT === */
.container {
    background-color: var(--color-bg-secondary);
    border: 2px solid var(--color-border-green);
    padding: 40px;
    border-radius: var(--border-radius-lg);
    
    /* Glassmorphism Blur */
    backdrop-filter: blur(15px) saturate(250%);
    -webkit-backdrop-filter: blur(15px) saturate(250%);
    
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.8), var(--shadow-glow-green);
    transition: transform 0.6s ease-out, box-shadow 0.6s ease-out;
    transform-style: preserve-3d;
    will-change: transform; 
    
    /* Grid Background */
    background-image: linear-gradient(0deg, transparent 50%, rgba(63, 255, 125, 0.05) 50%),
                        linear-gradient(90deg, transparent 50%, rgba(85, 182, 255, 0.05) 50%);
    background-size: 4px 4px;
    animation: holographic-shift 6s linear infinite;
}

.container:hover {
    transform: perspective(1000px) rotateX(1deg) rotateY(1deg) translateZ(5px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.9), var(--shadow-glow-green);
}

.container form {
    display: flex;
    flex-direction: column;
    gap: 25px; 
    transform: translateZ(0); 
}

/* Input Grouping Fieldset */
.input-group {
    border: 1px solid var(--color-border-blue);
    border-radius: var(--border-radius-sm);
    padding: 20px;
    margin-top: 10px;
    display: flex;
    flex-direction: column;
    gap: 25px;
    box-shadow: inset 0 0 10px rgba(85, 182, 255, 0.1);
}
.input-group legend {
    color: var(--color-neon-blue);
    font-weight: 700;
    padding: 0 10px;
    margin-left: -10px;
}

/* === INPUTS & FORMS === */
label {
    color: var(--color-text-primary);
    font-weight: 600;
    font-size: 1.1em;
    display: flex;
    align-items: center;
    text-shadow: 0 0 5px rgba(0, 0, 0, 0.5);
    margin-bottom: -15px; 
}

input[type="number"], input[type="file"] {
    background-color: #0d0d15;
    color: var(--color-text-primary);
    border: 1px solid #333;
    padding: 18px 16px; 
    border-radius: var(--border-radius-sm);
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.8);
    transition: border-color 0.3s, box-shadow 0.3s;
    font-family: var(--font-header);
}

input[type="file"] {
    border: 2px dashed var(--color-border-green);
    background-color: #080810;
}

input[type="number"]:focus, input[type="file"]:focus {
    border-color: var(--color-neon-green);
    box-shadow: 0 0 0 3px rgba(63, 255, 125, 0.3), 
                inset 0 0 10px rgba(63, 255, 125, 0.6),
                0 0 15px var(--color-neon-green); 
}

/* === BUTTON STYLING === */
button {
    padding: 16px; 
    width: 100%; 
    box-sizing: border-box; 
    border: none; 
    cursor: pointer;
    border-radius: var(--border-radius-sm);
    font-weight: 700;
    letter-spacing: 2px; 
    transition: all 0.2s ease;
}

#generate-button {
    background: linear-gradient(90deg, var(--color-neon-green), var(--color-neon-blue));
    background-size: 200% 100%;
    background-position: 0% 0%;
    transition: background-position 0.6s ease, 
                transform 0.2s ease, 
                box-shadow 0.2s ease;

    color: var(--color-bg-primary);
    margin-top: 40px;
    box-shadow: 0 8px 30px rgba(63, 255, 125, 0.6);
    font-size: 1.4em;
    text-transform: uppercase;
    font-family: var(--font-header);
}

#generate-button:hover {
    background-position: 100% 0%;
    transform: translateY(-2px) scale(1.01);
    box-shadow: 0 12px 35px rgba(85, 182, 255, 0.7);
}

#generate-button:active {
    transform: translateY(2px) scale(0.99);
    box-shadow: 0 2px 10px rgba(74, 222, 128, 0.7);
}


.copy-button {
    background: radial-gradient(circle at center, var(--color-neon-blue), #2563eb);
    color: var(--color-text-primary);
    padding: 12px 25px;
    font-weight: 600;
    flex-shrink: 0;
    width: auto; 
    border-radius: var(--border-radius-sm);
    box-shadow: 0 3px 15px rgba(59, 130, 246, 0.5);
    font-family: var(--font-header);
}
.copy-button:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.8);
}
.copy-button:active {
    transform: translateY(1px) scale(0.99);
    box-shadow: 0 1px 5px rgba(59, 130, 246, 0.7);
}

/* Separator with Animated Border */
.form-separator {
    height: 1px;
    margin: 20px 0;
    background: linear-gradient(90deg, transparent 0%, var(--color-border-green) 50%, transparent 100%);
    border: none;
    animation: border-pulse 4s infinite ease-in-out;
}

/* === CODE BLOCKS & RESULTS === */
pre {
    background-color: #080810;
    color: var(--color-neon-green);
    padding: 30px; 
    overflow-x: auto; 
    white-space: pre; 
    word-wrap: normal;
    
    border: 2px solid var(--color-neon-green);
    background-image: linear-gradient(rgba(63, 255, 125, 0.05) 1px, transparent 1px), 
                        linear-gradient(90deg, rgba(63, 255, 125, 0.05) 1px, transparent 1px);
    background-size: 20px 20px;
    box-shadow: var(--shadow-glow-green);
    border-radius: var(--border-radius-lg); 
    font-family: var(--font-header); /* monospace for code */
    font-size: 0.95em;
}

#utilityOutput {
    border-color: var(--color-neon-blue);
    box-shadow: var(--shadow-glow-blue);
    background-image: linear-gradient(rgba(85, 182, 255, 0.05) 1px, transparent 1px),
                        linear-gradient(90deg, rgba(85, 182, 255, 0.05) 1px, transparent 1px);
    background-size: 20px 20px;
}

/* Override highlight.js background to keep custom styling */
pre.hljs {
    background-color: #080810 !important;
    background-image: linear-gradient(rgba(63, 255, 125, 0.05) 1px, transparent 1px), 
                        linear-gradient(90deg, rgba(63, 255, 125, 0.05) 1px, transparent 1px) !important;
}

#utilityOutput.hljs {
    background-color: #080810 !important;
    background-image: linear-gradient(rgba(85, 182, 255, 0.05) 1px, transparent 1px),
                        linear-gradient(90deg, rgba(85, 182, 255, 0.05) 1px, transparent 1px) !important;
}

/* === KEYFRAME ANIMATIONS === */
@keyframes neon-flicker-blue {
    0% { 
        text-shadow: var(--shadow-glow-blue); 
        opacity: 1; 
        border-color: var(--color-neon-blue); 
    }
    1% { 
        text-shadow: 0 0 5px var(--color-neon-green); 
        opacity: 0.9; 
        border-color: var(--color-neon-green); 
    }
    2% { 
        text-shadow: var(--shadow-glow-blue); 
        opacity: 1; 
        border-color: var(--color-neon-blue); 
    }
    3% { 
        text-shadow: none; 
        opacity: 0.8; 
    }
    4% { 
        text-shadow: var(--shadow-glow-blue); 
        opacity: 1; 
        border-color: var(--color-neon-blue); 
    }
    50% { 
        text-shadow: var(--shadow-glow-blue); 
        opacity: 1; 
    }
    100% { 
        text-shadow: var(--shadow-glow-blue); 
        opacity: 1; 
    }
}

@keyframes holographic-shift {
    from { background-position: 0 0; }
    to { background-position: 40px 40px; }
}

@keyframes border-pulse {
    0% { opacity: 0.5; }
    50% { opacity: 1; }
    100% { opacity: 0.5; }
}

.result-header {
    margin-top: 50px;
    margin-bottom: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--color-border-green);
    display: flex; 
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}
.result-info-box {
    flex-grow: 1; 
}
.error {
    color: var(--color-error);
    font-weight: 600; 
    padding: 10px; 
    border: 1px solid 
    var(--color-error); border-radius: 
    var(--border-radius-sm); 
    background-color: rgba(255, 82, 82, 0.1); 
}
.success { color: var(--color-success); font-weight: 600; padding: 10px; border: 1px solid var(--color-success); border-radius: var(--border-radius-sm); background-color: rgba(63, 255, 125, 0.1); }

input[type=number]::-webkit-inner-spin-button, input[type=number]::-webkit-outer-spin-button { 
    -webkit-appearance: none;
    margin: 0; 
}
input[type=number] { 
    appearance: textfield;
    -moz-appearance: textfield; 
} 

#loading-screen {
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%; 
    display: none; 
    flex-direction: column; 
    justify-content: center; 
    align-items: center; 
    background: rgba(2, 2, 7, 0.98); 
    backdrop-filter: blur(15px); 
    z-index: 1000; 
    color: var(--color-text-primary); 
    font-family: var(--font-stack); 
    gap: 20px;
}
#loading-screen p { 
    color: var(--color-text-secondary); 
}
#loading-screen h2 { 
    font-size: 2.5em; 
    color: var(--color-neon-green); 
    animation: pulse 1.5s infinite alternate; 
    margin: 0; 
}
#progress-container {
    width: 100%;
    max-width: 400px;
    margin: 20px auto;
    background-color: rgba(15, 15, 25, 0.5);
    border: 1px solid var(--color-border-green);
    border-radius: 10px;
    padding: 5px;
    position: relative;
}
#progress-bar {
    height: 20px;
    background: linear-gradient(90deg, var(--color-neon-green), var(--color-neon-blue));
    border-radius: 8px;
    width: 0%;
    transition: width 0.3s ease;
}
#progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--color-text-primary);
    font-weight: bold;
}
@keyframes pulse { from { 
    opacity: 0.8; 
    text-shadow: 0 0 5px rgba(63, 255, 125, 0.3); 
} to {
    opacity: 1; 
    text-shadow: 0 0 20px rgba(63, 255, 125, 0.8); 
} }

/* Spinner for long-running conversions */
#spinner {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: 5px solid rgba(63,255,125,0.12);
    border-top-color: var(--color-neon-green);
    box-shadow: 0 0 18px rgba(63,255,125,0.35);
    animation: spin 0.95s linear infinite;
}
@keyframes spin { to { 
    transform: rotate(360deg); 
} }

/* Keep a simple fallback container style so the spinner sits nicely */
.loading-spinner-wrap { 
    width: 90px; 
    height: 90px; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
}

/* === AD STYLES === */
.ad-banner, .loading-ad {
    background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
    border: 1px solid rgba(255,255,255,0.04);
    border-radius: 10px;
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 8px 12px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.6);
}
.ad-banner img, .loading-ad img { 
    max-height: 
    48px; max-width: 100%; 
    border-radius: 6px; 
}
.ad-banner {
    width: 100%; 
    margin: 12px 0; 
}

/* === MOBILE RESPONSIVENESS === */
@media (max-width: 768px) {
    body {
        font-size: 14px;
    }
    h1 {
        font-size: 2em;
    }
    .container {
        padding: 20px;
        max-width: 100%;
    }
    .form-section {
        flex-direction: column;
    }
    .form-section > div {
        width: 100%;
        margin-bottom: 15px;
    }
    input[type="number"], input[type="file"] {
        font-size: 16px; /* Prevents zoom on iOS */
    }
    #generate-button {
        width: 100%;
        padding: 15px;
        font-size: 18px;
    }
    .result-header {
        flex-direction: column;
        text-align: center;
    }
    .copy-button {
        width: 100%;
        margin-top: 10px;
    }
    pre {
        font-size: 12px;
        white-space: pre-wrap;
        word-break: break-all;
    }
    #loading-screen h2 {
        font-size: 1.5em;
    }
    .loading-ad {
        margin: 10px 0;
    }
}
.loading-ad { 
    width: 320px; 
    max-width: 85vw; 
    text-align: center; 
    margin-top: 12px; 
    flex-direction: column; 
}
.ad-text { 
    font-size: 0.9em; 
    color: var(--color-text-secondary); 
}

/* === MOBILE RESPONSIVE DESIGN === */
@media (max-width: 768px) {
body {
    padding: 20px 10px;
    max-width: 100%;
}

h1 {
    font-size: 2.2em;
    letter-spacing: 3px;
    margin-bottom: 20px;
    padding-bottom: 10px;
}

h2 {
    font-size: 1.5em;
    margin-top: 30px;
}

h3 {
    font-size: 1.1em;
}

.container {
    padding: 20px;
    margin: 0;
}

.container form {
    gap: 15px;
}

.input-group {
    padding: 15px;
    gap: 15px;
}

label {
    font-size: 1em;
    margin-bottom: -10px;
}

input[type="number"], input[type="file"] {
    padding: 14px 12px;
    font-size: 16px; /* Prevents zoom on iOS */
}

button {
    padding: 14px;
    font-size: 1.1em;
}

#generate-button {
    margin-top: 30px;
    font-size: 1.2em;
}

pre {
    padding: 20px;
    font-size: 0.9em;
}

.result-header {
    flex-direction: column;
    gap: 15px;
    margin-top: 30px;
    margin-bottom: 15px;
    padding-top: 15px;
}

.copy-button {
    width: 100%;
    padding: 14px;
}

#loading-screen h2 {
    font-size: 2em;
}

#progress-container {
    max-width: 300px;
}
}

@media (max-width: 480px) {
body {
    padding: 15px 5px;
}

h1 {
    font-size: 1.8em;
    letter-spacing: 2px;
}

.container {
    padding: 15px;
}

.input-group {
    padding: 10px;
}

input[type="number"], input[type="file"] {
    padding: 12px 10px;
}

button {
    padding: 12px;
}

#generate-button {
    font-size: 1.1em;
}

pre {
    padding: 15px;
    font-size: 0.85em;
}
}