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

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
    overflow: hidden;
}

/* Animated background */
.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
}

.circle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    animation: float 20s infinite ease-in-out;
}

.circle-1 {
    width: 300px;
    height: 300px;
    top: -50px;
    left: -50px;
    animation-delay: 0s;
}

.circle-2 {
    width: 200px;
    height: 200px;
    top: 50%;
    right: -100px;
    animation-delay: 7s;
}

.circle-3 {
    width: 250px;
    height: 250px;
    bottom: -100px;
    left: 50%;
    animation-delay: 14s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) scale(1);
        opacity: 0.3;
    }
    50% {
        transform: translateY(-50px) scale(1.1);
        opacity: 0.5;
    }
}

.container {
    width: 100%;
    max-width: 500px;
    position: relative;
    z-index: 1;
}

.card {
    background: var(--bg-white);
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    padding: 40px;
    animation: slideUp 0.5s ease-out;
}

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

.header {
    text-align: center;
    margin-bottom: 30px;
}

.icon-wrapper {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    box-shadow: var(--shadow-lg);
}

.icon {
    width: 40px;
    height: 40px;
    color: white;
}

h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.5;
}

.warning-banner {
    background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%);
    border-left: 4px solid var(--warning-color);
    padding: 16px;
    border-radius: 12px;
    margin-bottom: 30px;
    display: flex;
    gap: 12px;
    animation: fadeIn 0.5s ease-out 0.2s both;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.warning-icon {
    width: 24px;
    height: 24px;
    color: var(--warning-color);
    flex-shrink: 0;
}

.warning-banner div {
    color: #92400e;
    font-size: 14px;
    line-height: 1.5;
}

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

label {
    display: block;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 14px;
}

.input-wrapper {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: var(--text-secondary);
    pointer-events: none;
}

input[type="email"] {
    width: 100%;
    padding: 14px 16px 14px 48px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 16px;
    font-family: inherit;
    transition: all 0.3s ease;
    background: var(--bg-light);
}

input[type="email"]:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--bg-white);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

input[type="email"]::placeholder {
    color: #9ca3af;
}

.submit-btn {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

.submit-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.submit-btn:active:not(:disabled) {
    transform: translateY(0);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-icon {
    width: 20px;
    height: 20px;
    transition: transform 0.3s ease;
}

.submit-btn:hover:not(:disabled) .btn-icon {
    transform: translateX(4px);
}

#result {
    margin-top: 24px;
    padding: 20px;
    border-radius: 12px;
    animation: fadeIn 0.3s ease-out;
}

#result:empty {
    display: none;
}

#result.success {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    border-left: 4px solid var(--success-color);
    color: #065f46;
}

#result.error {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    border-left: 4px solid var(--danger-color);
    color: #991b1b;
}

#result h2 {
    font-size: 20px;
    margin-bottom: 12px;
    color: inherit;
}

#result p {
    margin: 8px 0;
    line-height: 1.6;
}

#result code {
    background: rgba(0, 0, 0, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 13px;
}

#redirect-button {
    margin: 16px 0;
    padding: 12px 24px;
    background: var(--success-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

#redirect-button:hover {
    background: #059669;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.privacy-section {
    margin-top: 30px;
    padding: 20px;
    background: var(--bg-light);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

summary {
    cursor: pointer;
    font-weight: 500;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
    user-select: none;
    padding: 4px;
    border-radius: 8px;
    transition: background 0.2s ease;
}

summary:hover {
    background: rgba(99, 102, 241, 0.05);
}

.privacy-icon {
    width: 20px;
    height: 20px;
    color: var(--primary-color);
}

.privacy-content {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
    animation: fadeIn 0.3s ease-out;
}

.privacy-content ul {
    list-style: none;
    padding: 0;
}

.privacy-content li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    color: var(--text-secondary);
    line-height: 1.6;
}

.privacy-content li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.privacy-content strong {
    color: var(--text-primary);
}

/* Loading state */
.submit-btn.loading .btn-text::after {
    content: "";
    animation: dots 1.5s infinite;
}

@keyframes dots {
    0%, 20% {
        content: "";
    }
    40% {
        content: ".";
    }
    60% {
        content: "..";
    }
    80%, 100% {
        content: "...";
    }
}

/* Responsive design */
@media (max-width: 600px) {
    .card {
        padding: 30px 24px;
    }

    h1 {
        font-size: 24px;
    }

    .icon-wrapper {
        width: 60px;
        height: 60px;
    }

    .icon {
        width: 30px;
        height: 30px;
    }
}

/* Smooth transitions */
* {
    transition: background-color 0.3s ease;
}