:root {
    /* Neon Light Hybrid Theme Variables */
    --bg-color: #F8F9FA;
    --card-bg: #FFFFFF;
    --primary-color: #FF6B6B;
    /* Coral Pink */
    --secondary-color: #4ECDC4;
    /* Soft Blue */
    --text-main: #2D3436;
    --text-muted: #636E72;
    --border-color: #DFE6E9;
    --input-bg: #FFFFFF;

    /* Neon Structure Variables */
    --border-radius: 0px;
    /* Sharp corners for Neon feel */
    --border-width: 2px;
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 15px 35px rgba(255, 107, 107, 0.15);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    background-image:
        linear-gradient(90deg, rgba(223, 230, 233, 0.3) 1px, transparent 1px),
        linear-gradient(rgba(223, 230, 233, 0.3) 1px, transparent 1px);
    background-size: 40px 40px;
    /* Grid pattern from Neon theme but light */
}

.container {
    width: 100%;
    max-width: 1000px;
}

header {
    text-align: center;
    margin-bottom: 1rem;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 0.5rem;
    color: var(--text-main);
    text-transform: uppercase;
    /* Neon style typography */
}

header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.generator-card {
    background: var(--card-bg);
    border: var(--border-width) solid var(--text-main);
    /* Sharp border */
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    box-shadow: 10px 10px 0px rgba(45, 52, 54, 0.1);
    /* Brutalist/Neon shadow */
    overflow: hidden;
}

/* Left Side - Controls */
.controls-section {
    padding: 2rem;
    border-right: var(--border-width) solid var(--border-color);
}

.input-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

input,
select,
textarea {
    width: 100%;
    padding: 1rem;
    background: var(--input-bg);
    border: var(--border-width) solid var(--border-color);
    color: var(--text-main);
    font-size: 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    outline: none;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 4px 4px 0px rgba(255, 107, 107, 0.2);
}

.select-wrapper {
    position: relative;
}

.select-wrapper::after {
    content: '\f078';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    color: var(--text-muted);
}

select {
    appearance: none;
    cursor: pointer;
}

textarea {
    resize: vertical;
    min-height: 100px;
}

.customization-options {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.color-picker {
    flex: 1;
}

.color-picker input {
    height: 50px;
    padding: 0.2rem;
    cursor: pointer;
}

#generate-btn {
    width: 100%;
    padding: 1.2rem;
    background: var(--primary-color);
    color: white;
    border: none;
    font-size: 1.1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: var(--transition);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

#generate-btn:hover {
    background: #FF5252;
    transform: translateY(-2px);
    box-shadow: 4px 4px 0px rgba(45, 52, 54, 0.2);
}

/* Right Side - Preview */
.preview-section {
    padding: 3rem;
    background: #FAFAFA;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-left: var(--border-width) solid var(--border-color);
}

.qr-preview-container {
    width: 300px;
    height: 300px;
    background: white;
    border: var(--border-width) solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2rem;
    position: relative;
    box-shadow: 10px 10px 0px rgba(230, 230, 230, 1);
}

#qr-placeholder {
    text-align: center;
    color: var(--border-color);
}

#qr-placeholder i {
    font-size: 4rem;
    margin-bottom: 1rem;
}

#qr-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 1rem;
}

.action-buttons {
    display: flex;
    gap: 1rem;
    width: 100%;
    max-width: 300px;
}

.action-btn {
    flex: 1;
    padding: 0.8rem;
    background: white;
    border: var(--border-width) solid var(--text-main);
    color: var(--text-main);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-transform: uppercase;
    font-size: 0.9rem;
}

.action-btn:hover {
    background: var(--secondary-color);
    color: white;
    border-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 4px 4px 0px rgba(78, 205, 196, 0.3);
}

/* Utility Classes */
.hidden-form {
    display: none;
}

.active-form {
    display: block;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .generator-card {
        grid-template-columns: 1fr;
    }

    .controls-section {
        border-right: none;
        border-bottom: var(--border-width) solid var(--border-color);
    }

    .preview-section {
        border-left: none;
        padding: 2rem;
    }
}

/* --- New Styles for Bio Page Feature --- */

/* Tabs */
.mode-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: var(--border-width) solid var(--border-color);
    padding-bottom: 1rem;
}

.tab-btn {
    flex: 1;
    padding: 0.8rem;
    background: #F1F2F6;
    border: 2px solid transparent;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.tab-btn:hover {
    color: var(--text-main);
    background: #E4E7EB;
}

.tab-btn.active {
    color: white;
    background: var(--text-main);
    font-weight: 700;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* Secondary Button (Add Link) */
.secondary-btn {
    width: 100%;
    padding: 0.8rem;
    background: #F8F9FA;
    border: 2px solid #DFE6E9;
    color: var(--text-main);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.secondary-btn:hover {
    border-color: var(--text-main);
    background: white;
    transform: translateY(-2px);
}

/* Bio Link Row */
.bio-link-row {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    animation: fadeIn 0.3s ease-out;
}

.bio-link-row select {
    width: 140px;
}

.bio-link-row input {
    flex: 1;
}

.remove-link-btn {
    padding: 0 1rem;
    background: #FFECEC;
    color: #FF6B6B;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    border-radius: var(--border-radius);
}

.remove-link-btn:hover {
    background: #FF6B6B;
    color: white;
}

/* Create Bio Button */
#create-bio-btn {
    width: 100%;
    padding: 1rem;
    background: var(--text-main);
    color: white;
    border: none;
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: var(--transition);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

#create-bio-btn:hover {
    background: #000000;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}