/* ==================== CSS VARIABLES ==================== */
:root {
    /* Primary Colors - Purple theme */
    --color-primary: #6B46C1;
    --color-primary-dark: #553C9A;
    --color-primary-light: #8B5CF6;
    
    /* Secondary Colors */
    --color-secondary: #9F7AEA;
    --color-secondary-dark: #805AD5;
    --color-secondary-light: #B794F4;
    
    /* Neutral Colors */
    --color-background: #FFFFFF;
    --color-background-secondary: #F3F4F6;
    --color-background-purple-light: #E9D8FD;
    --color-background-dark: #2D1B69;
    
    /* Text Colors */
    --color-text-primary: #1F2937;
    --color-text-secondary: #6B7280;
    --color-text-light: #9CA3AF;
    --color-text-white: #FFFFFF;
    
    /* Border Colors */
    --color-border: #E5E7EB;
    --color-border-dark: #D1D5DB;
    --color-border-focus: #4A90E2;
    
    /* Status Colors */
    --color-success: #10B981;
    --color-error: #EF4444;
    --color-warning: #F59E0B;
    --color-info: #3B82F6;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* 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);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
}

/* ==================== GLOBAL STYLES ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--color-background-secondary);
    color: var(--color-text-primary);
    line-height: 1.6;
}

/* ==================== REGISTRATION FORM ==================== */
.registration-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: var(--spacing-lg);
}

.registration-form {
    background-color: var(--color-background);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-2xl);
    width: 100%;
    max-width: 500px;
}

.registration-form__header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.registration-form__title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.registration-form__subtitle {
    font-size: 1rem;
    color: var(--color-text-secondary);
}

.registration-form__body {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* Form Group */
.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group__label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.form-group__input {
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.form-group__input:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.form-group__input::placeholder {
    color: var(--color-text-light);
}

.form-group__select {
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    color: var(--color-text-primary);
    background-color: var(--color-background);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.form-group__select:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.form-group__error {
    font-size: 0.875rem;
    color: var(--color-error);
    display: none;
}

.form-group--error .form-group__input,
.form-group--error .form-group__select {
    border-color: var(--color-error);
}

.form-group--error .form-group__error {
    display: block;
}

/* Submit Button */
.registration-form__submit {
    padding: var(--spacing-md) var(--spacing-xl);
    background-color: var(--color-primary);
    color: var(--color-text-white);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.registration-form__submit:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.registration-form__submit:active {
    transform: translateY(0);
}

.registration-form__submit:disabled {
    background-color: var(--color-text-light);
    cursor: not-allowed;
    transform: none;
}

/* Language Switcher */
.language-switcher {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-sm);
}

.language-switcher__button {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-background);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.language-switcher__button:hover {
    background-color: var(--color-background-secondary);
    border-color: var(--color-border-dark);
}

.language-switcher__button--active {
    background-color: var(--color-primary);
    color: var(--color-text-white);
    border-color: var(--color-primary);
}

.language-switcher__button--active:hover {
    background-color: var(--color-primary-dark);
}

/* Loading State */
.registration-form--loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Success Card */
.success-card {
    display: none;
    text-align: center;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
    border-radius: var(--radius-lg);
    color: var(--color-text-white);
}

.success-card--visible {
    display: block;
}

.success-card__icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background-color: var(--color-success);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    font-weight: bold;
    color: var(--color-text-white);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.success-card__title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-white);
}

.success-card__message {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
}

.success-card__event {
    background-color: rgba(255, 255, 255, 0.15);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-xl);
    backdrop-filter: blur(10px);
}

.success-card__event-name {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.success-card__event-date {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.success-card__event-time {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-secondary-light);
}

.success-card__qr {
    background-color: var(--color-background);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.success-card__qr #qrcode {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: var(--spacing-md);
    position: relative;
}

.success-card__qr #qrcode img,
.success-card__qr #qrcode canvas {
    border-radius: var(--radius-sm);
}

/* QR Code Logo in center - temporarily disabled */
/* 
.qr-logo {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: var(--radius-md);
    padding: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 10;
}

.qr-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.3));
}
*/

.success-card__qr-text {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    margin: 0;
}

.success-card__user-id {
    font-size: 0.75rem;
    opacity: 0.7;
    margin: 0;
}

/* Responsive */
@media (max-width: 640px) {
    .registration-form {
        padding: var(--spacing-lg);
    }
    
    .registration-form__title {
        font-size: 1.5rem;
    }
    
    .language-switcher {
        position: static;
        justify-content: center;
        margin-bottom: var(--spacing-lg);
    }
}