:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --error-color: #ef4444;
    --success-color: #10b981;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-color: #f9fafb;
    --card-bg: #ffffff;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 1rem 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 10;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    text-decoration: none;
    color: white;
}

.logo img {
    height: 50px;
    width: auto;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

.registration-card {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
    margin-bottom: 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.registration-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 1.25rem 2rem;
    text-align: center;
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.card-body {
    padding: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -0.75rem;
}

.form-col {
    flex: 1 0 0;
    padding: 0 0.75rem;
    min-width: 250px;
}

.form-input {
    position: relative;
    margin-bottom: 1.5rem;
}

.form-input input,
.form-input select {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--card-bg);
    transition: var(--transition);
    outline: none;
    height: 52px;
}

.form-input input:focus,
.form-input select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

.form-input label {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
    background: var(--card-bg);
    padding: 0 0.5rem;
    transition: var(--transition);
    pointer-events: none;
    font-size: 1rem;
}

.form-input.filled label,
.form-input input:focus+label,
.form-input select:focus+label {
    top: 0;
    font-size: 0.75rem;
    color: var(--primary-color);
    transform: translateY(-50%) scale(0.9);
}

.form-input input:focus+label {
    color: var(--primary-color);
}

.toggle-password {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
    cursor: pointer;
    background: none;
    border: none;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toggle-password:hover {
    color: var(--primary-color);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.5;
    color: white;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    background: linear-gradient(135deg, var(--primary-dark), #1e40af);
}

.btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn-block {
    display: block;
    width: 100%;
    padding: 0.875rem 1rem;
}

.error-message {
    color: var(--error-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: block;
}

.success-message {
    background-color: #d1fae5;
    color: #065f46;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.success-message i {
    font-size: 1.25rem;
}

.form-footer {
    text-align: center;
    padding: 1.5rem 2rem;
    border-top: 1px solid var(--border-color);
    background-color: #f9fafb;
}

.login-link {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-light);
}

.login-link a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    margin-left: 0.25rem;
}

.login-link a:hover {
    text-decoration: underline;
}

.required {
    color: var(--error-color);
    margin-left: 0.25rem;
}

/* Error state */
.form-group.error .form-input input,
.form-group.error .form-input select {
    border-color: var(--error-color);
}

.form-group.error .form-input label {
    color: var(--error-color);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .form-col {
        flex: 1 0 100%;
        padding: 0;
    }

    .container {
        padding: 0 1rem;
    }

    .card-body {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .header-content {
        flex-direction: column;
        text-align: center;
        gap: 0.75rem;
        padding: 0.75rem 1rem;
    }

    .logo {
        justify-content: center;
    }

    .logo-text {
        font-size: 1.25rem;
    }

    .card-header {
        font-size: 1.25rem;
        padding: 1rem;
    }

    .btn {
        padding: 0.75rem 1rem;
    }
}