/* Modern & Premium Light Theme */
@import url('https://fonts.googleapis.com/css2?family=Sarabun:wght@300;400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Prompt:wght@300;400;500;600&display=swap');

:root {
    /* Refined Color Palette */
    --primary-color: #2563eb;
    /* Royal Blue */
    --primary-light: #60a5fa;
    --primary-dark: #1e40af;
    --accent-color: #8b5cf6;
    /* Violet */

    --background-page: #f0f4f8;
    --surface-card: rgba(255, 255, 255, 0.95);

    --text-main: #1f2937;
    --text-secondary: #6b7280;
    --border-color: #e2e8f0;

    /* Gradients */
    --bg-gradient: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    --primary-gradient: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);

    /* Functional */
    --success: #10b981;
    --error: #ef4444;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Prompt', 'Sarabun', sans-serif;
    background: #f3f4f6;
    background-image:
        radial-gradient(at 0% 0%, hsla(253, 16%, 7%, 1) 0, transparent 50%),
        radial-gradient(at 50% 0%, hsla(225, 39%, 30%, 1) 0, transparent 50%),
        radial-gradient(at 100% 0%, hsla(339, 49%, 30%, 1) 0, transparent 50%);
    background-image: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMDAlIiBoZWlnaHQ9IjEwMCUiPjxkZWZzPjxsaW5lYXJHcmFkaWVudCBpZD0iYSIgeDE9IjAlIiB5MT0iMCUiIHgyPSIxMDAlIiB5Mj0iMTAwJSI+PHN0b3Agb2Zmc2V0PSIwIiBzdG9wLWNvbG9yPSIjRjBGOUZGIi8+PHN0b3Agb2Zmc2V0PSIxIiBzdG9wLWNvbG9yPSIjRTVFN0VCIi8+PC9saW5lYXJHcmFkaWVudD48L2RlZnM+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgZmlsbD0idXJsKCNhKSIvPjxwYXRoIGZpbGw9InJnYmEoMzcsIDk5LCAyMzUsIDAuMDUpIiBkPSJNMCAwaDEwMHYxMDBIMHoiLz48L3N2Zz4=');
    background-size: cover;
    background-attachment: fixed;
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 3rem 1rem;
}

.container {
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
    animation: fadeIn 0.6s ease-out;
}

/* Glassmorphism Card */
.glass-card {
    background: var(--surface-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: 20px;
    padding: 3rem;
    box-shadow: var(--shadow-lg), 0 0 0 1px rgba(0, 0, 0, 0.02);
    position: relative;
    overflow: hidden;
}

/* Subtle accent line on top */
.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: var(--primary-gradient);
}

h1,
h2,
h3 {
    color: var(--text-main);
    font-family: 'Prompt', sans-serif;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 2rem;
    line-height: 1.3;
}

/* Form Elements */
.form-group {
    margin-bottom: 1.8rem;
    position: relative;
}

label {
    display: block;
    margin-bottom: 0.6rem;
    color: #4b5563;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s;
}

.form-group:focus-within label {
    color: var(--primary-color);
}

input[type="text"],
input[type="date"],
input[type="time"],
textarea,
select {
    width: 100%;
    padding: 0.85rem 1.1rem;
    background: #f9fafb;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-main);
    font-family: 'Sarabun', sans-serif;
    /* Keep Sarabun for inputs for reading comfort */
    font-size: 1rem;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    background: #ffffff;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15);
    transform: translateY(-1px);
}

/* Readonly fields styling */
input[readonly] {
    background-color: #f3f4f6;
    border-color: #e5e7eb;
    color: #6b7280;
    cursor: default;
    box-shadow: none;
}

input[readonly]:focus {
    box-shadow: none;
    background-color: #f3f4f6;
    border-color: #e5e7eb;
    transform: none;
}

/* Radio Buttons & Checkboxes */
.radio-group {
    display: flex;
    gap: 1rem;
    margin-top: 0.5rem;
    flex-wrap: wrap;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-main);
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: #fff;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    user-select: none;
}

.radio-label:hover {
    background: #f0f9ff;
    border-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.radio-label input:checked+span {
    /* If we wrapped text in span, currently we don't, but logic holds */
}

/* Custom styling for checked state via parent class logic would require JS, 
   but we can use :has() selector if modern browser support is assumed, 
   or just rely on the input's accent color. */

input[type="radio"],
input[type="checkbox"] {
    accent-color: var(--primary-color);
    width: 1.25em;
    height: 1.25em;
}

/* Buttons */
button.btn-primary {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 1rem 2.5rem;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    font-family: 'Prompt', sans-serif;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
    box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.3), 0 2px 4px -1px rgba(37, 99, 235, 0.15);
    margin-top: 2rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

button.btn-primary:hover {
    box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.4), 0 4px 6px -2px rgba(37, 99, 235, 0.2);
    transform: translateY(-2px);
}

button.btn-primary:active {
    transform: translateY(1px);
}

/* Back Link */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 1.5rem;
    font-weight: 500;
    transition: all 0.2s;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(4px);
}

.back-link:hover {
    color: var(--primary-color);
    background: rgba(255, 255, 255, 0.9);
    transform: translateX(-5px);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

/* Print Overrides */
@media print {
    body {
        background: white;
        padding: 0;
        display: block;
    }

    .container,
    .glass-card {
        max-width: 100%;
        margin: 0;
        padding: 0;
        box-shadow: none;
        border: none;
        backdrop-filter: none;
    }

    .no-print {
        display: none !important;
    }
}