/* 
 * Full Name Input Application Styles
 * A modern, elegant design system with smooth animations and responsive layout
 */

/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color palette - Unique teal-emerald professional scheme */
    --primary-gradient-start: #14b8a6;
    --primary-gradient-end: #059669;
    --background-dark: #0a1f1c;
    --background-mid: #1a3a35;
    --background-light: #234842;
    --text-primary: #ffffff;
    --text-secondary: #d1fae5;
    --input-bg: rgba(20, 184, 166, 0.08);
    --input-border: rgba(20, 184, 166, 0.25);
    --input-focus: rgba(20, 184, 166, 0.4);
    --success-color: #10b981;
    --error-color: #ef4444;

    /* Spacing system */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Typography */
    --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-base: 16px;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;

    /* Border radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);

    /* Multi-layer gradient background for depth */
    background: linear-gradient(135deg, var(--background-dark) 0%, var(--background-mid) 50%, var(--background-light) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);

    /* Smooth scrolling for better UX */
    overflow-x: hidden;
}

/* Animated background pattern overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(20, 184, 166, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(5, 150, 105, 0.12) 0%, transparent 50%);
    pointer-events: none;
    animation: backgroundPulse 15s ease-in-out infinite;
    z-index: 0;
}

@keyframes backgroundPulse {

    0%,
    100% {
        opacity: 0.5;
    }

    50% {
        opacity: 0.8;
    }
}

/* Main container with glassmorphism effect */
.container {
    position: relative;
    z-index: 1;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    max-width: 500px;
    width: 100%;
    box-shadow: var(--shadow-lg);

    /* Entrance animation */
    animation: slideInUp 0.6s ease-out;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

/* Header section */
.header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.header h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-gradient-start), var(--primary-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
    animation: fadeIn 0.8s ease-out 0.2s both;
}

.header p {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    animation: fadeIn 0.8s ease-out 0.4s both;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* Form styling */
.form-container {
    animation: fadeIn 0.8s ease-out 0.6s both;
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    transition: color 0.3s ease;
}

.form-group input {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--input-bg);
    border: 2px solid var(--input-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    font-family: var(--font-primary);
    transition: all 0.3s ease;
    outline: none;
}

/* Input focus and hover states */
.form-group input:focus {
    border-color: var(--primary-gradient-start);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 0 4px var(--input-focus);
    transform: translateY(-2px);
}

.form-group input:hover:not(:focus) {
    border-color: rgba(255, 255, 255, 0.3);
}

/* Input validation states */
.form-group input.error {
    border-color: var(--error-color);
    animation: shake 0.4s ease;
}

.form-group input.success {
    border-color: var(--success-color);
}

@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-10px);
    }

    75% {
        transform: translateX(10px);
    }
}

/* Error message styling */
.error-message {
    color: var(--error-color);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
    display: none;
    animation: fadeIn 0.3s ease;
}

.error-message.show {
    display: block;
}

/* Submit button with gradient and hover effects */
.submit-btn {
    width: 100%;
    padding: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-gradient-start), var(--primary-gradient-end));
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    font-weight: 600;
    font-family: var(--font-primary);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

/* Button hover effect */
.submit-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.submit-btn:hover::before {
    width: 300px;
    height: 300px;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(20, 184, 166, 0.5);
}

.submit-btn:active {
    transform: translateY(0);
}

/* Loading state for button */
.submit-btn.loading {
    pointer-events: none;
    opacity: 0.7;
}

/* Reset button with subtle transparent design */
.reset-btn {
    width: 100%;
    padding: var(--spacing-md);
    margin-top: var(--spacing-sm);
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    font-weight: 500;
    font-family: var(--font-primary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.reset-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.3);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.reset-btn:active {
    transform: translateY(0);
}


/* Result display section */
.result-container {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    display: none;
    animation: slideInUp 0.5s ease-out;
}

.result-container.show {
    display: block;
}

.result-container h2 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.result-name {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    background: linear-gradient(135deg, var(--success-color), var(--primary-gradient-start));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeIn 0.6s ease-out;
}

/* Responsive design for smaller screens */
@media (max-width: 768px) {
    :root {
        --font-size-2xl: 1.5rem;
        --font-size-xl: 1.25rem;
        --spacing-xl: 2rem;
    }

    .container {
        padding: var(--spacing-lg);
    }

    body {
        padding: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-2xl: 1.25rem;
        --font-size-xl: 1.125rem;
        --spacing-xl: 1.5rem;
    }
}

/* Accessibility: Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {

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