:root {
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --primary-light: rgba(52, 152, 219, 0.1);
    --secondary-color: #2c3e50;
    --success-color: #2ecc71;
    --text-color: #1a1a1a;
    --text-muted: #8898aa;
    --border-radius: 16px;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

body,
html {
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    display: flex;
    flex-direction: column;
}

.background {
    position: relative;
    width: 100%;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.3), rgba(44, 62, 80, 0.5)), url('../img/background.jpg') no-repeat center center fixed;
    background-size: cover;
    padding: 40px 20px;
}

.signup-form-container {
    width: 100%;
    max-width: 650px;
    position: relative;
    z-index: 1;
}

.signup-form-box {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 24px;
    padding: 35px 40px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
    height: 540.3px;
    display: flex;
    flex-direction: column;
}

.login-brand {
    text-align: center;
    margin-bottom: 15px;
}

.login-brand h2 {
    font-size: 22px;
    font-weight: 800;
    color: var(--secondary-color);
    margin-bottom: 5px;
}

.login-brand p {
    font-size: 14px;
    color: var(--text-muted);
    margin: 0;
}

.form-stepper {
    height: 415px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.stepper-header {
    display: flex;
    justify-content: space-between;
    position: relative;
    margin-bottom: 20px;
}

.stepper-header::after {
    content: '';
    position: absolute;
    top: 20px;
    left: 0;
    right: 0;
    height: 2px;
    background: #e9ecef;
    z-index: 1;
}

.stepper-step {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
}

.step-indicator {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: #fff;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    margin-bottom: 8px;
    border: 2px solid #e9ecef;
    transition: var(--transition);
}

.step-label {
    font-size: 12px;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stepper-step.active .step-indicator {
    background: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
    box-shadow: 0 4px 10px rgba(52, 152, 219, 0.3);
}

.stepper-step.active .step-label {
    color: var(--primary-color);
}

.step-panel {
    display: none;
    animation: fadeIn 0.4s ease-out;
}

.step-panel.active {
    display: block;
}

#signupForm {
    flex: 1;
    display: flex;
    flex-direction: column;
    margin-bottom: 0;
}

.stepper-body {
    height: 215px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 10px;
}

.form-row-triple {
    grid-template-columns: 1fr 1fr 0.7fr !important;
}

.form-field-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
    text-align: left;
    margin-bottom: 18px;
    position: relative;
}

.form-label {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--secondary-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-label i {
    color: var(--primary-color);
    width: 16px;
}

.form-control {
    width: 100% !important;
    height: 48px !important;
    padding: 10px 16px !important;
    border: 1.5px solid #e9ecef !important;
    border-radius: 12px !important;
    font-size: 0.9rem !important;
    transition: var(--transition) !important;
    background: white !important;
    color: var(--secondary-color) !important;
}

.form-control:focus {
    outline: none !important;
    border-color: var(--primary-color) !important;
    box-shadow: 0 0 0 4px var(--primary-light) !important;
}

.input-combo {
    display: flex;
    gap: 10px;
}

.input-combo select {
    width: 80px !important;
    flex-shrink: 0;
    text-align: center;
    text-align-last: center;
}

.form-row-triple .input-combo select {
    width: 60px !important;
}

.form-actions {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #e9ecef;
    height: 80px;
}

.invalid-feedback {
    display: block;
    font-size: 11px;
    color: var(--danger-color);
    font-weight: 600;
    text-align: left;
    position: absolute;
    bottom: -20px;
    left: 4px;
    width: 100%;
}

.form-btn {
    flex: 1;
    height: 50px;
    border-radius: 12px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    white-space: nowrap;
}

.btn-next,
.btn-submit {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: #fff;
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.2);
}

.btn-prev {
    background: #f8f9fa;
    color: var(--secondary-color);
    border: 1.5px solid #e9ecef;
}

.step-info {
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
    font-style: italic;
    margin-top: 15px;
}

.signup-footer {
    text-align: center;
    padding-top: 15px;
    margin-top: 15px;
    border-top: 1px dashed #e9ecef;
    font-size: 14px;
    color: var(--text-muted);
    height: 35px;
}

.signup-footer a {
    color: var(--primary-color);
    font-weight: 700;
    text-decoration: none;
}

.signup-footer a:hover {
    text-decoration: underline;
}

.form-btn:hover:not(:disabled) {
    transform: translateY(-2px);
}

.form-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

@media (max-width: 768px) {

    html,
    body {
        overflow: hidden !important;
        height: 100dvh !important;
    }

    .background {
        padding: 10px 12px;
        align-items: flex-start;
        padding-top: 25px;
        height: 100dvh;
        overflow: hidden;
    }

    .signup-form-box {
        padding: 10px 8px;
        height: auto !important;
        min-height: auto;
        width: 100%;
        max-width: 100%;
        border-radius: 10px;
        margin: 0 auto;
    }

    .form-header {
        margin-bottom: 5px;
    }

    .form-header h2 {
        font-size: 1.15rem;
        margin: 0;
    }

    .form-header p {
        display: none;
    }

    .form-stepper {
        height: auto !important;
        gap: 1px;
    }

    .stepper-header {
        margin-bottom: 8px;
    }

    .step-indicator {
        width: 24px;
        height: 24px;
        font-size: 0.75rem;
        border-radius: 6px;
    }

    .stepper-header::after {
        top: 12px;
    }

    .stepper-body {
        height: auto !important;
        min-height: auto;
        margin-bottom: 4px;
    }

    .form-group {
        margin-bottom: 5px;
    }

    .form-group label {
        margin-bottom: 1px;
        font-size: 0.68rem;
    }

    .form-group label i {
        display: none;
    }

    .form-control {
        height: 32px;
        padding: 4px 8px;
        font-size: 0.85rem;
        border-radius: 6px;
    }

    .form-actions {
        height: auto !important;
        margin-top: 5px;
        padding-bottom: 5px;
    }

    .signup-footer {
        height: auto !important;
        padding-top: 5px;
        margin-top: 2px;
        font-size: 11px;
    }

    .form-row {
        grid-template-columns: 1fr !important;
        gap: 5px;
    }

    .form-row-triple {
        grid-template-columns: 1fr 1fr !important;
        gap: 5px;
    }

    .form-row-triple> :last-child {
        grid-column: span 2;
    }

    .step-label {
        display: none;
    }

    .form-btn {
        height: 35px;
        font-size: 0.85rem;
        border-radius: 6px;
    }
}