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

:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-gradient-hover: linear-gradient(135deg, #7c8ef5 0%, #8a5bb8 100%);
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    --bg-gradient-animated: linear-gradient(-45deg, #667eea, #764ba2, #f093fb, #4facfe);
    --text-primary: #1a202c;
    --text-secondary: #718096;
    --border-color: #e2e8f0;
    --border-focus: #667eea;
    --error-color: #ef4444;
    --success-color: #10b981;
    --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);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-gradient);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(118, 75, 162, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(240, 147, 251, 0.2) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.container {
    width: 100%;
    max-width: 520px;
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-wrapper {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 48px;
    box-shadow: var(--shadow-2xl);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.form-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

h1 {
    color: var(--text-primary);
    margin-bottom: 8px;
    text-align: center;
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 40px;
}

.form-group {
    margin-bottom: 28px;
    position: relative;
}

label {
    display: block;
    margin-bottom: 10px;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.2px;
    transition: color 0.2s ease;
}

label::after {
    content: '';
    display: inline-block;
    width: 4px;
    height: 4px;
    background: var(--error-color);
    border-radius: 50%;
    margin-left: 4px;
    vertical-align: middle;
}

input[type="text"],
input[type="email"],
input[type="tel"] {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 16px;
    font-weight: 400;
    color: var(--text-primary);
    background: #ffffff;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    outline: none;
    box-shadow: var(--shadow-sm);
}

input[type="text"]:hover,
input[type="email"]:hover,
input[type="tel"]:hover {
    border-color: #cbd5e0;
    box-shadow: var(--shadow-md);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1), var(--shadow-md);
    transform: translateY(-1px);
}

/* Убираем подсветку после ввода - поля возвращаются к обычному состоянию */
input[type="text"]:not(:focus),
input[type="email"]:not(:focus),
input[type="tel"]:not(:focus) {
    transform: none;
}

/* Для валидных полей после ввода - обычное состояние */
input[type="email"]:valid:not(:focus):not(:placeholder-shown),
input[type="tel"]:valid:not(:focus):not(:placeholder-shown) {
    border-color: var(--border-color);
    box-shadow: var(--shadow-sm);
}

input[type="text"]::placeholder,
input[type="email"]::placeholder,
input[type="tel"]::placeholder {
    color: #a0aec0;
    font-weight: 400;
}

input[type="text"]:invalid:not(:placeholder-shown):not(:focus),
input[type="email"]:invalid:not(:placeholder-shown):not(:focus),
input[type="tel"]:invalid:not(:placeholder-shown):not(:focus) {
    border-color: var(--error-color);
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.1);
}

.phone-input-wrapper {
    display: flex;
    align-items: center;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: #ffffff;
    box-shadow: var(--shadow-sm);
}

.phone-input-wrapper:hover {
    border-color: #cbd5e0;
    box-shadow: var(--shadow-md);
}

.phone-input-wrapper:focus-within {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1), var(--shadow-md);
    transform: translateY(-1px);
}

/* Убираем подсветку телефона после ввода */
.phone-input-wrapper:not(:focus-within) {
    transform: none;
}

.country-code {
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
    padding: 14px 18px;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 16px;
    border-right: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 6px;
}

.country-code::before {
    content: '🇺🇸';
    font-size: 18px;
}

.phone-input-wrapper input {
    border: none;
    flex: 1;
    padding: 14px 18px;
    background: transparent;
}

.phone-input-wrapper input:focus {
    box-shadow: none;
    transform: none;
}

.error-message {
    display: block;
    color: var(--error-color);
    font-size: 13px;
    margin-top: 8px;
    min-height: 20px;
    font-weight: 500;
    animation: slideDown 0.3s ease-out;
    padding-left: 0;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.submit-btn {
    width: 100%;
    padding: 16px 24px;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.3px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    margin-top: 12px;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.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;
}

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

.submit-btn:hover {
    background: var(--primary-gradient-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

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

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: var(--shadow-sm);
}

.submit-btn:disabled:hover {
    transform: none;
    box-shadow: var(--shadow-sm);
}

/* Анимация загрузки */
.submit-btn:disabled::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-left: -10px;
    margin-top: -10px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Улучшенная адаптивность */
@media (max-width: 600px) {
    .form-wrapper {
        padding: 32px 24px;
        border-radius: 20px;
    }

    h1 {
        font-size: 28px;
        margin-bottom: 32px;
    }

    .form-group {
        margin-bottom: 24px;
    }

    input[type="text"],
    input[type="email"],
    input[type="tel"] {
        padding: 12px 16px;
        font-size: 16px; /* Предотвращает зум на iOS */
    }

    .country-code {
        padding: 12px 16px;
    }

    .phone-input-wrapper input {
        padding: 12px 16px;
    }

    .submit-btn {
        padding: 14px 20px;
    }
}

@media (max-width: 400px) {
    body {
        padding: 12px;
    }

    .form-wrapper {
        padding: 24px 20px;
    }

    h1 {
        font-size: 24px;
    }
}

/* Темная тема (опционально, можно добавить переключатель) */
@media (prefers-color-scheme: dark) {
    /* Можно добавить поддержку темной темы в будущем */
}

/* Улучшения для доступности */
input:focus-visible {
    outline: 2px solid var(--border-focus);
    outline-offset: 2px;
}

/* Плавная прокрутка */
html {
    scroll-behavior: smooth;
}