:root {
    /* Updated Color Scheme */
    --color-bg: #0f0f13;
    --color-surface: #1a1a22;
    --color-surface-variant: #24242e;
    --color-surface-elevated: #2c2c38;
    
    --color-primary: #8a2be2;
    --color-primary-variant: #9d4edd;
    --color-primary-light: #bb86fc;
    --gradient-primary: linear-gradient(135deg, #8a2be2, #9d4edd);
    
    --color-secondary: #03dac6;
    --color-error: #ff5c8d;
    --color-warning: #ffb766;
    --color-success: #4ecca3;
    --gradient-success: linear-gradient(135deg, #4ecca3, #2dd4bf);
    --gradient-warning: linear-gradient(135deg, #ffb766, #ff9800);
    --gradient-error: linear-gradient(135deg, #ff5c8d, #ff4081);
    
    --color-on-bg: rgba(255, 255, 255, 0.9);
    --color-on-surface: rgba(255, 255, 255, 0.9);
    --color-on-surface-muted: rgba(255, 255, 255, 0.6);
    --color-on-primary: #ffffff;
    --color-on-secondary: #000000;
    
    --color-border: rgba(255, 255, 255, 0.08);
    --color-input-bg: rgba(255, 255, 255, 0.05);
    --color-focus: rgba(138, 43, 226, 0.5);
    --color-hover: rgba(255, 255, 255, 0.05);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15), 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 6px 12px rgba(0, 0, 0, 0.25), 0 3px 5px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.3), 0 5px 10px rgba(0, 0, 0, 0.2);
    --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.2);
    
    /* Animations */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-medium: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-pill: 50px;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    
    /* Typography */
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    color: var(--color-on-bg);
    background: var(--color-bg);
    background-image: 
        radial-gradient(circle at 20% 35%, rgba(138, 43, 226, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 75% 44%, rgba(3, 218, 198, 0.05) 0%, transparent 60%);
    background-attachment: fixed;
    line-height: 1.5;
    font-size: 16px;
    overflow-x: hidden;
    min-height: 100vh;
    height: auto;
    overflow-y: visible;
    position: relative;
    -webkit-overflow-scrolling: touch;
}

/* Selection styling */
::selection {
    background-color: var(--color-primary);
    color: var(--color-on-primary);
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-surface);
}

::-webkit-scrollbar-thumb {
    background: var(--color-surface-variant);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary-variant);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
    color: var(--color-on-bg);
    letter-spacing: -0.01em;
}

h1 {
    font-size: 2.25rem;
    font-weight: var(--font-weight-bold);
}

h2 {
    font-size: 1.75rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

h5 {
    font-size: 1.125rem;
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-on-surface-muted);
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.text-primary {
    color: var(--color-primary) !important;
}

.text-success {
    color: var(--color-success) !important;
}

.text-warning {
    color: var(--color-warning) !important;
}

.text-danger {
    color: var(--color-error) !important;
}

.text-muted {
    color: var(--color-on-surface-muted) !important;
}

/* Layout */
.container {
    max-width: 1200px;
    width: 100%;
    padding: var(--spacing-lg);
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

/* Header */
header {
    background-color: var(--color-surface);
    padding: var(--spacing-xl) 0;
    text-align: center;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 100;
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
    color: var(--color-primary-light);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

header p {
    margin: var(--spacing-sm) 0 0;
    color: var(--color-on-surface-muted);
    font-size: 1.1rem;
}

/* Form Container */
.form-container {
    background-color: var(--color-surface);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    margin: var(--spacing-xl) auto;
    max-width: 800px;
    animation: fadeIn 0.4s ease-in-out;
}

.form-container h2 {
    margin-top: 0;
    color: var(--color-primary-light);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    padding-bottom: var(--spacing-md);
}

/* Input Groups */
.input-group {
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.input-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--color-on-surface);
    font-weight: var(--font-weight-medium);
}

.input-group input {
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--color-input-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-on-surface);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.input-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-focus);
}

/* Buttons */
button {
    background: var(--gradient-primary);
    color: var(--color-on-primary);
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-medium);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

button:disabled {
    background: var(--color-on-surface-muted);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

button::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-medium);
    z-index: -1;
}

button:hover::before {
    opacity: 1;
}

/* Response Messages */
#responseMessage {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    display: none;
    animation: fadeIn 0.4s ease-in-out;
}

.success {
    background-color: rgba(46, 125, 50, 0.2);
    border-left: 4px solid var(--color-success);
    color: var(--color-success);
}

.error {
    background-color: rgba(198, 40, 40, 0.2);
    border-left: 4px solid var(--color-error);
    color: var(--color-error);
}

/* Footer */
footer {
    background-color: var(--color-surface);
    padding: var(--spacing-lg) 0;
    text-align: center;
    margin-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

.footer-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.footer-content p {
    margin: 0;
    color: var(--color-on-surface-muted);
    font-size: 0.9rem;
}

.social-links {
    margin-top: var(--spacing-md);
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.social-icon {
    display: inline-block;
    width: 32px;
    height: 32px;
    transition: transform var(--transition-medium);
}

.social-icon:hover {
    transform: translateY(-3px);
}

.social-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* Admin Link */
.admin-link {
    position: fixed;
    bottom: 10px;
    right: 10px;
    color: var(--color-on-surface-muted);
    font-size: 0.8rem;
    text-decoration: none;
    opacity: 0.3;
    transition: opacity var(--transition-fast);
}

.admin-link:hover {
    opacity: 1;
    color: var(--color-primary-light);
}

/* Animations */
.fade-in {
    animation: fadeIn 0.4s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 20px;
        --spacing-md: 15px;
        --spacing-sm: 10px;
    }
    
    header {
        padding: var(--spacing-lg) 0;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .form-container {
        padding: var(--spacing-lg);
        margin: var(--spacing-lg) auto;
    }
    
    .input-group {
        margin-bottom: var(--spacing-md);
    }
    
    button {
        padding: var(--spacing-md);
        width: 100%;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 16px;
        --spacing-md: 12px;
    }
    
    header h1 {
        font-size: 1.75rem;
    }
    
    .form-container {
        padding: var(--spacing-md);
    }
}