:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #8b5cf6;
    --accent-hover: #7c3aed;
    --border-color: #334155;
    --input-bg: #0f172a;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    background-image:
        radial-gradient(circle at 15% 50%, rgba(59, 130, 246, 0.1), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(139, 92, 246, 0.15), transparent 25%);
    background-size: cover;
    background-repeat: no-repeat;
    height: 100%;
}

.navbar {
    padding: 1.5rem 3rem;
    border-bottom: 1px solid var(--border-color);
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 10;
}

.navbar::after {
    content: "";
    display: table;
    clear: both;
}

.nav-links {
    float: left;
}

.nav-links .nav-btn {
    display: inline-block;
    margin-right: 1.5rem;
}

.login-btn-container {
    float: right;
}

.nav-btn.login-btn {
    float: right;
}

.nav-btn {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    padding: 0.75rem 1.5rem;
    border-radius: 9999px;
    transition: all 0.3s ease;
    border: 1px solid transparent;
    text-transform: uppercase;
}

.nav-btn:hover {
    color: var(--text-primary);
}

.nav-btn.outline {
    border-color: var(--border-color);
}

.nav-btn.outline:hover {
    border-color: var(--text-primary);
}

.nav-btn.active {
    background-color: transparent;
    border-color: var(--text-primary);
    color: var(--text-primary);
}

.nav-btn.login-btn {
    border: 1px solid var(--border-color);
}

.nav-btn.login-btn:hover {
    background-color: var(--text-primary);
    color: var(--bg-color);
}

.nav-btn.login-btn.active {
    background-color: transparent;
    border-color: var(--text-primary);
    color: var(--text-primary);
}

.container {
    padding: 2rem;
    min-height: calc(100vh - 80px);
    position: relative;
}

.thank-you-card {
    background-color: var(--card-bg);
    padding: 2.5rem 3rem;
    border-radius: 1.5rem;
    width: 100%;
    max-width: 550px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;

    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.thank-you-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
    opacity: 0.7;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translate(-50%, calc(-50% + 30px));
    }

    to {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
}

h2 {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 2rem;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    text-align: left;
}

.thank-you-form {
    display: block;
}

.form-group {
    display: block;
    margin-bottom: 2rem;
}

.form-group label.tracking-label {
    display: block;
    margin-bottom: 1rem;
}

.custom-select-wrapper {
    position: relative;
    display: block;
}

.custom-select-wrapper::after {
    content: '▼';
    font-size: 0.7rem;
    color: var(--text-secondary);
    position: absolute;
    right: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
}

.custom-select {
    appearance: none;
    width: 100%;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 1rem 1.25rem;
    border-radius: 0.75rem;
    font-family: inherit;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
    display: block;
}

.custom-select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2), inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.custom-select option {
    background-color: var(--card-bg);
    color: var(--text-primary);
}

.tracking-label {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.custom-textarea {
    width: 100%;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 1rem 1.25rem;
    border-radius: 0.75rem;
    font-family: inherit;
    font-size: 1rem;
    resize: vertical;
    transition: all 0.3s ease;
    min-height: 140px;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
    display: block;
}

.custom-textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2), inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.custom-textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.5;
}

.custom-input {
    width: 100%;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 1rem 1.25rem;
    border-radius: 0.75rem;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
    display: block;
}

.custom-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2), inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.custom-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.5;
}

.submit-btn {
    background: linear-gradient(135deg, var(--accent-hover), var(--accent-color));
    color: white;
    border: none;
    padding: 1rem;
    border-radius: 0.75rem;
    font-family: inherit;
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 0.5rem;
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
    display: block;
    width: 100%;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(139, 92, 246, 0.4);
    filter: brightness(1.1);
}

.submit-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(139, 92, 246, 0.3);
}

@media (max-width: 768px) {
    .navbar {
        padding: 1.5rem;
        text-align: center;
    }

    .nav-links,
    .nav-btn.login-btn {
        float: none;
        display: block;
    }

    .nav-links .nav-btn {
        display: inline-block;
        margin: 0.5rem;
    }

    .nav-btn.login-btn {
        display: inline-block;
        margin-top: 1rem;
    }

    .container {
        padding: 1rem;
    }

    .thank-you-card {
        padding: 2rem 1.5rem;
        position: static;
        transform: none;
        margin: 2rem auto;
        animation: none;
    }
}