@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap');

:root {
    --primary: #2563EB;
    --primary-hover: #1D4ED8;
    --primary-focus: rgba(37, 99, 235, 0.2);
    --primary-inverse: #FFFFFF;
    
    --background-color: #F8FAFC;
    --card-background-color: rgba(255, 255, 255, 0.75);
    --card-border-color: rgba(255, 255, 255, 0.4);
    
    --text-color: #334155;
    --muted-color: #64748B;
    --secondary: #64748B;

    --border-color: #E2E8F0;
    --border-radius: 1.25rem;
    --box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.01);
    
    --font-family: 'Outfit', 'Pretendard', 'Noto Sans SC', sans-serif;
    
    --h1-color: #0F172A;
    --h2-color: #1E293B;
    --h3-color: #334155;
}

body {
    background: linear-gradient(135deg, #e0f2fe 0%, #ffffff 50%, #f0fdf4 100%);
    background-size: 200% 200%;
    animation: gradientShift 15s ease infinite;
    min-height: 100vh;
    font-weight: 400;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Glassmorphism containers */
article, .glass-card {
    background: var(--card-background-color);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--card-border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2.5rem;
    margin-bottom: 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* Fix Pico CSS header/footer boundaries for the new 2.5rem padding */
article > header, .glass-card > header {
    margin-top: -2.5rem;
    margin-left: -2.5rem;
    margin-right: -2.5rem;
    margin-bottom: 2rem;
    padding: 1.5rem 2.5rem;
    background: rgba(248, 250, 252, 0.4);
    border-bottom: 1px solid var(--border-color);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

article > footer, .glass-card > footer {
    margin-top: 2rem;
    margin-left: -2.5rem;
    margin-right: -2.5rem;
    margin-bottom: -2.5rem;
    padding: 1.5rem 2.5rem;
    background: rgba(248, 250, 252, 0.4);
    border-top: 1px solid var(--border-color);
    border-radius: 0 0 var(--border-radius) var(--border-radius);
}

article:hover, .glass-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
}

/* Nav Bar Enhancement */
header.container nav {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
    border-radius: 1rem;
    padding: 0.5rem 1.5rem;
    margin-top: 1rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
    border: 1px solid rgba(255,255,255,0.6);
}

header.container nav ul li a {
    font-weight: 500;
    transition: color 0.2s ease;
}

header.container nav ul li a:hover {
    color: var(--primary);
}

/* Button Upgrades */
button, input[type="submit"], input[type="button"], a[role="button"] {
    background: linear-gradient(135deg, #2563EB 0%, #3B82F6 100%);
    border: none !important;
    border-radius: 0.75rem;
    color: white !important;
    font-weight: 600;
    letter-spacing: 0.025em;
    padding: 0.75rem 1.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.2);
}

button:hover, input[type="submit"]:hover, input[type="button"]:hover, a[role="button"]:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.3);
    background: linear-gradient(135deg, #1D4ED8 0%, #2563EB 100%);
}

button.outline, a[role="button"].outline {
    background: transparent !important;
    color: var(--primary) !important;
    border: 2px solid var(--primary) !important;
    box-shadow: none;
}

button.outline:hover, a[role="button"].outline:hover {
    background: #eff6ff !important;
    transform: translateY(-2px);
    color: var(--primary-hover) !important;
}

button.contrast {
    background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
    box-shadow: 0 4px 6px -1px rgba(15, 23, 42, 0.2);
}
button.contrast:hover {
    background: linear-gradient(135deg, #000000 0%, #0F172A 100%);
    box-shadow: 0 10px 15px -3px rgba(15, 23, 42, 0.3);
}

/* Inputs and Forms */
input:not([type="checkbox"]):not([type="radio"]), select, textarea {
    background: rgba(255,255,255,0.7) !important;
    border: 1px solid #CBD5E1 !important;
    border-radius: 0.75rem !important;
    padding: 0.75rem 1rem !important;
    transition: all 0.2s ease !important;
    font-family: inherit;
    color: var(--text-color);
}

input:not([type="checkbox"]):not([type="radio"]):focus, select:focus, textarea:focus {
    background: #FFFFFF !important;
    border-color: var(--primary) !important;
    box-shadow: 0 0 0 4px var(--primary-focus) !important;
    outline: none !important;
}

/* Form Legends and Labels */
legend strong, label strong {
    font-size: 1.1rem;
    color: var(--h2-color);
    display: inline-block;
    margin-bottom: 0.5rem;
}

/* Structure grid for modern layout */
.section-card {
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid #E2E8F0;
    border-radius: 1rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: background 0.3s ease;
}
.section-card:hover {
    background: rgba(255, 255, 255, 0.8);
}

.section-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 2px dashed #E2E8F0;
    padding-bottom: 0.75rem;
}

/* Radio and Checkbox modern pill design logic */
.option-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
    margin-top: 0.5rem;
}

/* A label functioning as a card wrapper */
label.option-card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 1.25rem;
    border-radius: 1rem;
    border: 2px solid #E2E8F0;
    background: rgba(255,255,255,0.6);
    cursor: pointer;
    transition: all 0.2s ease;
    margin: 0;
}

label.option-card:hover {
    border-color: #93C5FD;
    background: #FFFFFF;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.03);
}

label.option-card:has(input:checked) {
    border-color: var(--primary);
    background: #eff6ff; /* light blue bg */
    box-shadow: 0 4px 6px -1px rgba(37,99,235, 0.1);
}

/* Hide actual radio/checkbox visually but keep accessible */
label.option-card input[type="radio"], label.option-card input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 1px;
    height: 1px;
    margin: -1px;
}

label.option-card strong {
    display: block;
    margin-bottom: 0.25rem;
    color: var(--h2-color);
    font-size: 1rem;
}
label.option-card small {
    color: var(--muted-color);
    font-size: 0.85rem;
    font-weight: normal;
}

/* Selected mark inside option card */
label.option-card .check-icon {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
    color: #CBD5E1;
    transition: color 0.2s;
    font-size: 1.2rem;
}
label.option-card:has(input:checked) .check-icon {
    color: var(--primary);
}

/* File Dropzone Upgrades */
.file-dropzone {
    border: 2px dashed #94A3B8 !important;
    background: rgba(241, 245, 249, 0.6) !important;
    border-radius: 1rem !important;
    padding: 3rem 1.5rem !important;
    transition: all 0.3s ease !important;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.file-dropzone:hover {
    border-color: var(--primary) !important;
    background: rgba(241, 245, 249, 0.9) !important;
}
.file-dropzone.is-dragover {
    border-color: var(--primary) !important;
    background: #eff6ff !important;
    transform: scale(1.02);
}
.file-dropzone p {
    font-size: 1.15rem !important;
    font-weight: 600 !important;
    color: var(--text-color) !important;
}
.file-dropzone .file-dropzone__hint {
    color: var(--muted-color) !important;
    font-size: 0.95rem !important;
}
.file-upload__button {
    background: linear-gradient(135deg, #10B981 0%, #059669 100%) !important; /* Green accent for upload */
}
.file-upload__button:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%) !important;
}

/* Hero Section */
.hero-section {
    text-align: center;
    padding: 3rem 1rem 4rem 1rem;
}
.hero-badge {
    display: inline-block;
    background: #eff6ff;
    color: var(--primary);
    padding: 0.4rem 1rem;
    border-radius: 2rem;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    border: 1px solid #bfdbfe;
}
.hero-section h2 {
    font-size: 3.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, #1E3A8A 0%, #3B82F6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}
.hero-section p.lead {
    font-size: 1.25rem;
    color: var(--text-color);
    max-width: 650px;
    margin: 0 auto 2.5rem auto;
    line-height: 1.6;
    text-wrap: pretty;
}
.hero-section .lead-sentence {
    display: inline-block;
    max-width: 100%;
    white-space: normal;
}
.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}
.hero-actions .hero-btn {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* Utility layout */
.flex-column {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* Feature icon */
.feature-icon-wrapper {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    border-radius: 0.75rem;
    background: #eff6ff;
    color: var(--primary);
    margin-bottom: 1rem;
}