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

:root {
    /* Color Variables */
    --color-primary-blue: #3b82f6;
    --color-primary-purple: #8b5cf6;
    --color-primary-cyan: #06b6d4;
    --color-slate-900: #0f172a;
    --color-slate-800: #1e293b;
    --color-slate-700: #334155;
    --color-slate-600: #475569;
    --color-slate-500: #64748b;
    --color-slate-400: #94a3b8;
    --color-slate-300: #cbd5e1;
    --color-slate-200: #e2e8f0;
    --color-slate-100: #f1f5f9;
    --color-slate-50: #f8fafc;
    --color-white: #ffffff;

    /* Gradients */
    --gradient-primary: linear-gradient(
            135deg,
            var(--color-primary-blue) 0%,
            var(--color-primary-purple) 50%,
            var(--color-primary-cyan) 100%
    );
    --gradient-background: linear-gradient(
            135deg,
            var(--color-slate-900) 0%,
            var(--color-slate-800) 50%,
            var(--color-slate-700) 100%
    );
    --gradient-card: linear-gradient(135deg, var(--color-white) 0%, var(--color-slate-50) 100%);
    --gradient-existing-bg: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);

    /* Base sizing */
    --base-unit: 0.25rem;
    --border-width: 0.125rem;
    --border-radius-sm: 0.375rem;
    --border-radius-md: 0.625rem;
    --border-radius-lg: 1.25rem;

    /* Spacing scale */
    --space-1: var(--base-unit);
    --space-2: calc(var(--base-unit) * 2);
    --space-3: calc(var(--base-unit) * 3);
    --space-4: calc(var(--base-unit) * 4);
    --space-5: calc(var(--base-unit) * 5);
    --space-6: calc(var(--base-unit) * 6);
    --space-8: calc(var(--base-unit) * 8);
    --space-10: calc(var(--base-unit) * 10);
    --space-12: calc(var(--base-unit) * 12);
    --space-16: calc(var(--base-unit) * 16);

    /* Typography */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.75rem;
    --font-size-3xl: 2rem;

    /* Transitions */
    --transition-standard: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--gradient-background);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    position: relative;
}

body::before {
    content: "";
    position: absolute;
    inset: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="%23ffffff" opacity="0.02"/><circle cx="75" cy="75" r="1" fill="%23ffffff" opacity="0.02"/><circle cx="50" cy="10" r="0.5" fill="%23ffffff" opacity="0.03"/><circle cx="20" cy="80" r="0.5" fill="%23ffffff" opacity="0.03"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    pointer-events: none;
}

/* Form container */
.form-container {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(1.25rem);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 2rem 4rem rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(255, 255, 255, 0.05), inset 0 1px 0
    rgba(255, 255, 255, 0.1);
    padding: var(--space-12);
    width: 100%;
    max-width: 32.5rem;
    position: relative;
}

/*
.form-container::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 0.25rem;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
}
 */

/* Form header */
.form-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.form-header h1 {
    color: var(--color-slate-900);
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, var(--color-slate-900) 0%, var(--color-primary-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.form-header p {
    color: var(--color-slate-500);
    font-size: var(--font-size-base);
    line-height: 1.5;
}

/* Form elements */
fieldset {
    border: none;
    padding: 0;
    margin: 0 0 var(--space-6) 0;
}

legend {
    font-weight: 600;
    color: var(--color-slate-900);
    font-size: var(--font-size-xs);
    letter-spacing: -0.01em;
    text-transform: uppercase;
    padding: 0;
    margin-bottom: var(--space-2);
    width: 100%;
}

.radio-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.radio-option {
    display: flex;
    align-items: center;
    padding: var(--space-5);
    border: var(--border-width) solid var(--color-slate-200);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition-standard);
    background: var(--gradient-card);
    position: relative;
    overflow: hidden;
}

.radio-option::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.1), transparent);
    transition: left 0.5s ease;
}

.radio-option:hover {
    border-color: var(--color-primary-blue);
    background: linear-gradient(135deg, var(--color-white) 0%, #eff6ff 100%);
    transform: translateY(-0.125rem);
    box-shadow: 0 0.5rem 1.5625rem rgba(59, 130, 246, 0.15);
}

.radio-option:hover::before {
    left: 100%;
}

.radio-option.selected {
    border-color: var(--color-primary-blue);
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    box-shadow: 0 0.25rem 1.25rem rgba(59, 130, 246, 0.2);
}

.radio-option input[type="radio"] {
    margin-right: var(--space-4);
    width: 1.25rem;
    height: 1.25rem;
    accent-color: var(--color-primary-blue);
}

.radio-option label {
    font-weight: 600;
    color: var(--color-slate-900);
    cursor: pointer;
    flex: 1;
    font-size: var(--font-size-base);
    letter-spacing: -0.01em;
}

.address-fields {
    display: none;
    animation: slideIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.address-fields.show {
    display: block;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-1.25rem) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.form-row {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-5);
}

.form-field {
    flex: 1;
}

.form-field.full-width {
    flex: 100%;
}

label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: 600;
    color: var(--color-slate-900);
    font-size: var(--font-size-xs);
    letter-spacing: -0.01em;
    text-transform: uppercase;
}

/* Input styles - shared between text and number */
input[type="text"],
input[type="number"] {
    width: 100%;
    padding: var(--space-4);
    border: var(--border-width) solid var(--color-slate-200);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-base);
    font-weight: 500;
    transition: var(--transition-standard);
    background: var(--gradient-card);
    color: var(--color-slate-900);
    font-family: inherit;
}

input[type="text"]:focus,
input[type="number"]:focus {
    outline: none;
    border-color: var(--color-primary-blue);
    box-shadow: 0 0 0 0.25rem rgba(59, 130, 246, 0.1), 0 0.25rem 1.25rem rgba(59, 130, 246, 0.15);
    background: var(--color-white);
    transform: translateY(-0.0625rem);
}

input[type="text"]::placeholder,
input[type="number"]::placeholder {
    color: var(--color-slate-400);
    font-weight: 400;
}

/* Remove default number input arrows */
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type="number"] {
    -moz-appearance: textfield;
}

.existing-address {
    display: none;
    padding: var(--space-6);
    background: var(--gradient-existing-bg);
    border-radius: var(--border-radius-md);
    border: var(--border-width) solid #0ea5e9;
    margin-bottom: var(--space-6);
    position: relative;
    overflow: hidden;
}

.existing-address::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0.25rem;
    background: linear-gradient(180deg, #0ea5e9 0%, var(--color-primary-blue) 100%);
}

.existing-address.show {
    display: block;
    animation: slideIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.existing-address h3 {
    color: var(--color-slate-900);
    margin-bottom: var(--space-2);
    font-size: var(--font-size-lg);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.existing-address p {
    color: var(--color-slate-600);
    margin: 0;
    font-weight: 500;
    line-height: 1.6;
}

.input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.input-suffix {
    position: absolute;
    right: var(--space-4);
    color: var(--color-slate-500);
    font-weight: 500;
    font-size: var(--font-size-sm);
    pointer-events: none;
}

.input-group input[type="number"] {
    padding-right: 3.5rem;
}

.submit-btn {
    width: 100%;
    background: var(--gradient-primary);
    color: var(--color-white);
    border: none;
    padding: 1.125rem var(--space-8);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-base);
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-standard);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
    overflow: hidden;
    font-family: inherit;
    margin-top: var(--space-4);
}

.submit-btn::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.submit-btn:hover {
    transform: translateY(-0.1875rem);
    box-shadow: 0 0.75rem 2.5rem rgba(59, 130, 246, 0.4), 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.submit-btn:hover::before {
    left: 100%;
}

.submit-btn:active {
    transform: translateY(-0.0625rem);
}

/* Animation styles for address fields */
.address-field-container {
    overflow: hidden;
    transition: max-height 0.3s ease-out, opacity 0.3s ease-out;
}

.address-field-container.sliding-down {
    max-height: 0;
    opacity: 0;
}

.address-field-container.sliding-up {
    max-height: 200px; /* Adjust based on your content */
    opacity: 1;
}

.autocomplete-container {
    overflow: hidden;
    transition: max-height 0.3s ease-out, opacity 0.3s ease-out;
}

.autocomplete-container.sliding-down {
    max-height: 60px; /* Adjust based on autocomplete height */
    opacity: 1;
}

.autocomplete-container.sliding-up {
    max-height: 0;
    opacity: 0;
}

@media (max-width: 30rem) {
    .form-container {
        padding: var(--space-8) var(--space-4);
        margin: var(--space-4);
    }

    .form-header h1 {
        font-size: var(--font-size-2xl);
    }

    .form-row {
        flex-direction: column;
        gap: var(--space-5);
    }

    .radio-option {
        padding: var(--space-4);
    }
}