/* ==========================================================================
   Enhanced Form Stylesheet - Modern Design System (Compact Version)
   ========================================================================== */

/* CSS Custom Properties for Easy Customization
   ========================================================================== */
:root {
    /* Primary Color Palette */
    --color-primary: #2563eb;
    --color-primary-light: #3b82f6;
    --color-primary-dark: #1d4ed8;
    --color-primary-50: #eff6ff;
    --color-primary-100: #dbeafe;
    --color-primary-500: #3b82f6;

    /* Success Colors (for the submit button) */
    --color-success: #059669;
    --color-success-light: #10b981;
    --color-success-dark: #047857;
    --color-success-50: #ecfdf5;

    /* Neutral Color Palette */
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;

    /* Typography */
    --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-family-display: 'Inter', system-ui, sans-serif;

    /* Font Sizes - Reduced */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 0.9rem;
    --text-lg: 1rem;
    --text-xl: 1.125rem;
    --text-2xl: 1.25rem;
    --text-3xl: 1.5rem;

    /* Font Weights */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;

    /* Spacing Scale - Reduced */
    --space-1: 0.25rem;
    --space-2: 0.4rem;
    --space-3: 0.6rem;
    --space-4: 0.8rem;
    --space-5: 1rem;
    --space-6: 1.2rem;
    --space-8: 1.5rem;
    --space-10: 2rem;
    --space-12: 2.5rem;
    --space-16: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.25rem;

    /* 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 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Layout - Reduced */
    --container-max-width: 420px;
    --form-padding: var(--space-6);
    --input-height: 2.75rem;

    /* Placeholder Colors - Light Mode */
    --placeholder-color: var(--color-gray-400);
    --placeholder-color-focus: var(--color-gray-300);
}

/* Dark Mode Color Variables */
@media (prefers-color-scheme: dark) {
    :root {
        --placeholder-color: #9ca3af;
        --placeholder-color-focus: #6b7280;
    }
}

/* Reset and Base Styles
     ========================================================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family-primary);
    font-size: var(--text-base);
    font-weight: var(--font-normal);
    line-height: 1.5;
    color: var(--color-gray-900);
    background: linear-gradient(135deg, var(--color-primary-50) 0%, var(--color-gray-50) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Main Container
     ========================================================================== */
.form-container {
    width: 100%;
    max-width: var(--container-max-width);
    background: var(--color-white);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    padding: var(--form-padding);
    position: relative;
    overflow: hidden;
}

.form-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
}

/* Typography
     ========================================================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-family-display);
    font-weight: var(--font-bold);
    line-height: 1.2;
    color: var(--color-gray-900);
    margin-bottom: var(--space-5);
}

h2 {
    font-size: var(--text-2xl);
    font-weight: var(--font-extrabold);
    text-align: center;
    color: var(--color-gray-800);
    margin-bottom: var(--space-6);
    position: relative;
}

h2::after {
    content: '';
    position: absolute;
    bottom: -var(--space-2);
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    border-radius: var(--radius-sm);
}

/* Form Styles
     ========================================================================== */
.form {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.form-group {
    position: relative;
    display: flex;
    flex-direction: column;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
}

/* Input Styles
     ========================================================================== */
.form-input,
.form-textarea {
    width: 100%;
    height: var(--input-height);
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
    font-weight: var(--font-medium);
    color: var(--color-gray-900);
    background-color: var(--color-gray-50);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    outline: none;
    font-family: inherit;
    line-height: 1.4;
}

.form-textarea {
    height: auto;
    min-height: calc(var(--input-height) * 2.2);
    resize: vertical;
    padding-top: var(--space-3);
    padding-bottom: var(--space-3);
    line-height: 1.5;
}

/* Select Dropdown Specific Styles */
select.form-input {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right var(--space-3) center;
    background-repeat: no-repeat;
    background-size: 1.25em 1.25em;
    padding-right: calc(var(--space-4) + 1.5rem);
    appearance: none;
    cursor: pointer;
    line-height: 1.2;
    min-height: var(--input-height);
}

select.form-input:focus {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%232563eb' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
}

select.form-input option {
    padding: var(--space-2);
    font-size: var(--text-base);
    line-height: 1.4;
    color: var(--color-gray-900);
    background-color: var(--color-white);
}

/* Enhanced Placeholder Styles - Dark Mode Compatible */
.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--placeholder-color);
    font-weight: var(--font-normal);
    transition: all var(--transition-fast);
    opacity: 1;
    /* Ensure placeholder is always visible */
}

.form-input:focus::placeholder,
.form-textarea:focus::placeholder {
    color: var(--placeholder-color-focus);
    transform: translateY(-1px);
    opacity: 0.8;
    /* Slightly fade on focus but keep visible */
}

.form-input:focus,
.form-textarea:focus {
    background-color: var(--color-white);
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    transform: translateY(-1px);
}

/* Input States */
.form-input:valid {
    border-color: var(--color-success);
}

.form-input:invalid:not(:placeholder-shown) {
    border-color: #ef4444;
}

/* Button Styles
     ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    font-family: inherit;
    line-height: 1.2;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    user-select: none;
    min-height: var(--input-height);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-success), var(--color-success-light));
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-success-dark), var(--color-success));
    box-shadow: var(--shadow-lg);
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-md);
}

.btn-primary:focus {
    outline: none;
    box-shadow: var(--shadow-lg), 0 0 0 3px rgba(5, 150, 105, 0.2);
}

/* Button Loading State */
.btn-loading {
    pointer-events: none;
    opacity: 0.8;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 14px;
    height: 14px;
    margin: auto;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Form Sections
     ========================================================================== */
.form-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.form-section-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--color-gray-700);
    margin-bottom: var(--space-2);
    padding-bottom: var(--space-2);
    border-bottom: 1px solid var(--color-gray-200);
}

/* Enhanced Visual Elements
     ========================================================================== */
.form-container::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.02) 0%, transparent 70%);
    pointer-events: none;
}

/* Success/Error Messages */
.form-message {
    padding: var(--space-3);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    margin-top: var(--space-3);
    opacity: 0;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
}

.form-message.show {
    opacity: 1;
    transform: translateY(0);
}

.form-message.success {
    background-color: var(--color-success-50);
    color: var(--color-success-dark);
    border: 1px solid rgba(5, 150, 105, 0.2);
}

.form-message.error {
    background-color: #fef2f2;
    color: #dc2626;
    border: 1px solid rgba(220, 38, 38, 0.2);
}

/* Back Link Styles */
.back-link {
    text-align: center;
    margin-top: var(--space-5);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-gray-200);
}

.link-subtle {
    color: var(--color-gray-500);
    text-decoration: none;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    transition: color var(--transition-fast);
}

.link-subtle:hover {
    color: var(--color-primary);
}

/* Dark Mode Support - Enhanced Placeholder Visibility
     ========================================================================== */
@media (prefers-color-scheme: dark) {
    body {
        background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
        color: #f9fafb;
    }

    .form-container {
        background: rgba(31, 41, 55, 0.95);
        border: 1px solid rgba(75, 85, 99, 0.3);
    }

    .form-input,
    .form-textarea {
        background-color: rgba(55, 65, 81, 0.8);
        border-color: rgba(75, 85, 99, 0.5);
        color: #f9fafb;
    }

    .form-input:focus,
    .form-textarea:focus {
        background-color: rgba(55, 65, 81, 0.9);
        border-color: var(--color-primary-light);
    }

    /* Dark Mode Placeholder - Maintain Visibility */
    .form-input::placeholder,
    .form-textarea::placeholder {
        color: #9ca3af !important;
        /* Force gray color in dark mode */
        opacity: 1 !important;
        /* Ensure full opacity */
    }

    .form-input:focus::placeholder,
    .form-textarea:focus::placeholder {
        color: #6b7280 !important;
        /* Slightly darker on focus but still visible */
        opacity: 0.9 !important;
    }

    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
        color: #f9fafb;
    }

    select.form-input option {
        background-color: #374151;
        color: #f9fafb;
    }
}

/* Responsive Design
     ========================================================================== */
@media (max-width: 640px) {
    :root {
        --form-padding: var(--space-5);
        --container-max-width: 100%;
        --input-height: 2.5rem;
    }

    body {
        padding: var(--space-2);
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: var(--space-3);
    }

    h2 {
        font-size: var(--text-xl);
        margin-bottom: var(--space-5);
    }

    .form-input,
    .form-textarea,
    .btn {
        font-size: var(--text-sm);
    }

    select.form-input {
        padding-right: calc(var(--space-3) + 1.25rem);
        background-size: 1em 1em;
    }
}

@media (max-width: 480px) {
    :root {
        --form-padding: var(--space-4);
        --container-max-width: 100%;
    }

    .form-container {
        border-radius: var(--radius-xl);
    }

    h2 {
        font-size: var(--text-lg);
        margin-bottom: var(--space-4);
    }

    .form {
        gap: var(--space-3);
    }
}

/* Accessibility Enhancements
     ========================================================================== */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus Visible for Better Keyboard Navigation */
.form-input:focus-visible,
.form-textarea:focus-visible,
.btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --color-gray-200: #000000;
        --color-gray-400: #666666;
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    }

    .form-input::placeholder,
    .form-textarea::placeholder {
        color: #666666 !important;
        opacity: 1 !important;
    }
}

/* Print Styles */
@media print {
    body {
        background: white;
        color: black;
    }

    .form-container {
        box-shadow: none;
        border: 1px solid #000;
    }

    .btn {
        background: white !important;
        color: black !important;
        border: 1px solid black !important;
    }

    .form-input::placeholder,
    .form-textarea::placeholder {
        color: #666666 !important;
    }
}

/* Animation for Form Appearance */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

.form-container {
    animation: fadeInUp 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Staggered Animation for Form Elements */
.form-group:nth-child(1) {
    animation-delay: 0.05s;
}

.form-group:nth-child(2) {
    animation-delay: 0.1s;
}

.form-group:nth-child(3) {
    animation-delay: 0.15s;
}

.form-group:nth-child(4) {
    animation-delay: 0.2s;
}

.form-group:nth-child(5) {
    animation-delay: 0.25s;
}

.form-group {
    animation: fadeInUp 0.3s cubic-bezier(0.4, 0, 0.2, 1) both;
}